Biden's interior dept. acts quickly on Vineyard Wind


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Vineyard Wind I advances as BOEM issues a final environmental impact statement for the 800 MW offshore wind farm south of Martha's Vineyard, delivering clean energy, jobs, and carbon reductions to Massachusetts toward net-zero.

 

Key Points

An 800 MW offshore wind project near Martha's Vineyard supplying clean power to Massachusetts.

✅ 800 MW capacity; power for 400,000+ homes and businesses

✅ BOEM final EIS; record of decision pending within 30+ days

✅ 1.68M metric tons CO2 avoided annually; jobs and lower rates

 

Federal environmental officials have completed their review of the Vineyard Wind I offshore wind farm, moving the project that is expected to deliver clean renewable energy to Massachusetts by the end of 2023 closer to becoming a reality.

The U.S. Department of the Interior said Monday morning that its Bureau of Ocean Energy Management completed the analysis it resumed about a month ago, published the project's final environmental impact statement, and said it will officially publish notice of the impact statement in the Federal Register later this week.

"More than three years of federal review and public comment is nearing its conclusion and 2021 is poised to be a momentous year for our project and the broader offshore wind industry," Vineyard Wind CEO Lars Pedersen said. "Offshore wind is a historic opportunity to build a new industry that will lead to the creation of thousands of jobs, reduce electricity rates for consumers and contribute significantly to limiting the impacts of climate change. We look forward to reaching the final step in the federal permitting process and being able to launch an industry that has such tremendous potential for economic development in communities up and down the Eastern seaboard."

The 800-megawatt wind farm planned for 15 miles south of Martha's Vineyard was the first offshore wind project selected by Massachusetts utility companies with input from the Baker administration to fulfill part of a 2016 clean energy law. It is projected to generate cleaner electricity for more than 400,000 homes and businesses in Massachusetts, produce at least 3,600 jobs, reduce costs for Massachusetts ratepayers by an estimated $1.4 billion, and eliminate 1.68 million metric tons of carbon dioxide emissions annually.

Offshore wind power, informed by the U.S. offshore wind outlook, is expected to become an increasingly significant part of Massachusetts' energy mix. The governor and Legislature agree on a goal of net-zero carbon emissions by 2050, but getting there is projected to require having about 25 gigawatts of offshore wind power. That means Massachusetts will need to hit a pace in the 2030s where it has about 1 GW of new offshore wind power on the grid coming online each year.

"I think that's why today's announcement is so historic, because it does represent that culmination of work to understand how to permit and build a cost-effective and environmentally-responsible wind farm that can deliver clean energy to Massachusetts ratepayers, but also just how to do this from start to finish," said Energy and Environmental Affairs Secretary Kathleen Theoharides. "As we move towards our goal of probably [25 GW] of offshore wind by 2050 to hit our net-zero target, this does give us confidence that we have a much clearer path in terms of permitting."

She added, "There's a huge pipeline, so getting this project out really should open the door to the many additional projects up and down the East Coast, such as Long Island proposals, that will come after it."

According to the American Wind Energy Association, there are expected to be 14 offshore projects totaling 9,112 MW of capacity in operation by 2026.

Susannah Hatch, the clean energy coalition director for the Environmental League of Massachusetts and a leader of the broad-based New England for Offshore Wind Regional group, called offshore wind farms like Vineyard Wind "the linchpin of our decarbonization efforts in New England." She said the Biden administration's quick action on Vineyard Wind is a positive sign for the burgeoning sector.

"Moving swiftly on responsibly developed offshore wind is critical to our efforts to mitigate climate change, and offshore wind also provides an enormous opportunity to grow the economy, create thousands of jobs, and drive equitable economic benefits through increased minority economic participation in New England," Hatch said.

With the final environmental impact statement published, Vineyard Wind still must secure a record of decision from BOEM, which processes wind lease requests, an air permit from the Environmental Protection Agency and sign-offs from the U.S. Army Corps of Engineers and the National Marine Fisheries Service to officially clear the way for the project that is on track to be the nation's first utility-scale offshore wind farm. BOEM must wait at least 30 days from the publication of the final environmental impact statement to issue a record of decision.

Project officials have said they expect the final impact statement and then a record of decision "sometime in the first half of 2021." That would allow the project to hit its financial close milestone in the second half of this year, begin on-shore work quickly thereafter, start offshore construction in 2022, begin installing turbines in 2023 and begin exporting power to the grid, marking Vineyard Wind first power, by late 2023, Pedersen said in January.

"Offshore energy development provides an opportunity for us to work with Tribal nations, communities, and other ocean users to ensure all decisions are transparent and utilize the best available science," BOEM Director Amanda Lefton said.

The commercial fishing industry has been among the most vocal opponents of aspects of the Vineyard Wind project and the Responsible Offshore Development Alliance (RODA) has repeatedly urged the new administration to ensure the voices of the industry are heard throughout the licensing and permitting process.

In comments submitted earlier this month in response to a BOEM review of an offshore wind project that is expected to deliver power to New York, including the recent New York offshore wind approval, RODA said the present is "a time of significant confusion and change in the U.S. approach to offshore wind energy (OSW) planning" and detailed mitigation measures it wants to see incorporated into all projects.

"To be clear, none of these requests are new -- nor hardly radical. They have simply been ignored again, and again, and again in a political push/pull between multinational energy companies and the U.S. government, leaving world-famous seafood, and the communities founded around its harvest, off the table," the group said in a press release last week. Some of RODA's suggestions were analyzed as part of BOEM's Vineyard Wind review.

Vineyard Wind has certainly taken a circuitous path to get to this point. The timeline for the project was upended in August 2019 when the Trump administration decided to conduct a much broader assessment of potential offshore wind projects up and down the East Coast, which delayed the project by almost a year.

When the Trump administration delayed its action on a final environmental impact statement last year, Vineyard Wind on Dec. 1 announced that it was pulling its project out of the federal review pipeline in order to complete an internal study on whether the decision to use a certain type of turbine would warrant changes to construction and operations plan. The Trump administration declared the federal review of the project "terminated."

Within two weeks of President Joe Biden being inaugurated, Vineyard Wind said its review determined no changes were necessary and the company resubmitted its plans for review. BOEM agreed to pick up where the Trump administration had left off despite the agency previously declaring its review terminated.

"It would appear that fishing communities are the only ones screaming into a void while public resources are sold to the highest bidder, as BOEM has reversed its decision to terminate a project after receiving a single letter from Vineyard Wind," RODA said.

The final environmental impact statement that BOEM published Monday showed that the federal regulators believe the Vineyard Wind I development as proposed will have "moderate" impacts on commercial fisheries and for-hire recreational fishing outfits, and that the project combined with other factors not related to wind energy development will have "major" impacts on commercial and recreational fishing ventures.

Vineyard Wind pointed Monday to the fishery mitigation agreements it has entered into with Massachusetts and Rhode Island, a fishery science collaboration with the University of Massachusetts Dartmouth's School of Marine Science and Technology, and an agreement with leading environmental organizations around the protection of the endangered right whale.

Responding to concerns about safe navigation among RODA and others in the fishing sector, Vineyard Wind and the four other developers holding leases for offshore wind sites off New England agreed to orient their turbines in fixed east-to-west rows and north-to-south columns spaced one nautical mile apart. Last year, the U.S. Coast Guard concluded that the grid layout was the best way to maintain maritime safety and ease of navigation in the offshore wind development areas south of Martha's Vineyard and Nantucket.

Since a 2016 clean energy law kicked off the state's foray into the offshore wind world, Massachusetts utilities have contracted for a total of about 1,600 MW between two projects, Vineyard Wind I and Mayflower Wind.

A joint venture of Shell and Ocean Winds North America, Mayflower Wind was picked unanimously in 2019 by utility executives to build and operate a wind farm approximately 26 nautical miles south of Martha's Vineyard and 20 nautical miles south of Nantucket, with South Coast construction activity expected as the project progresses. The 804-megawatt project is expected to be operational by December 2025.

Massachusetts and its utilities are expected to go out to bid for up to another 1,600 MW of offshore wind generation capacity later this year using authorization granted by the Legislature in 2018.

The climate policy bill that Gov. Charlie Baker returned to the Legislature with amendments more than a month ago would require that the executive branch direct Massachusetts utilities to buy an additional 2,400 MW of offshore wind power.

 

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Tesla's lead in China's red-hot electric vehicle market is shrinking, says rival XPeng

China EV Market sees surging deliveries as Tesla, XPeng, Nio, and Li Auto race for market share, driven by tech-forward infotainment, autonomous features, and strong P7 and G3 demand, signaling intensifying competition and rapid growth.

 

Key Points

China EV Market features rapid EV sales growth led by Tesla, XPeng, Nio, and Li Auto amid tech-driven competition.

✅ XPeng deliveries up 617% YoY in June; 459% YTD growth

✅ Nio and Li Auto post triple-digit quarterly gains

✅ Tech focus: infotainment, ADAS; models P7, G3, G3i

 

XPeng President and Vice Chairman Brian Gu is quick to praise the Tesla brand and acknowledge the EV maker's "commanding" market share in China, and in key markets like the California EV market as well. 

But in the same breath, the executive at the upstart China-based EV rival said his company and peers are fast closing the competitive gap with Tesla.

"I think the Chinese players are catching up very quickly," Gu said on Yahoo Finance Live. "Our product as well as some of the other products that are being introduced by the leading players are very good, and have comparable specs — as well as better features I think compared to Tesla."

That point is not lost in the sales data from the main China EV players, and mirrors the global EV surge seen in recent years.

XPeng said this week deliveries in June surged 617% year-over-year to 6,565. So far this year, deliveries have skyrocketed 459% to 30,738 fueled by demand for XPeng's P7 sedan and G3 SUV, despite concerns about the biggest threats to the EV boom among investors. 

June deliveries at Nio rose 116% from a year ago to 8,083, even as mainstream adoption hurdles remain industry-wide. For the quarter ending June 30, Nio delivered 21,896 vehicles marking a growth rate from a year ago of 112%. 

As for Li Auto, its June deliveries rose 321% from a year earlier to 7,713. Second quarter deliveries improved 166% year-over-year to 17,575.

Tesla reportedly sold 33,155 cars in China in June, up 122% year-over-year, even as its energy business outlook remains a focus for investors. 

"In the last few months, our growth has outpaced the industry as well as Tesla in China. But I think it's a long race because ultimately this market will not be dominated by one or two companies. It will probably be a number of players occupying probably large market share positions of 10% and above. That will likely be the trend, and we hope to be one of those top players," Gu explained. 

XPeng — which JPMorgan analysts estimate could grab 8% of China's electric car market by 2025 —currently has two models in the Chinese electric car market, as China's carmakers push into Europe too. They have gained notoriety in an increasingly crowded market for their tech-forward infotainment systems and autonomous technology.

The company's third model dubbed the G3i is expected to see deliveries begin in September, taking aim at smaller sedans such as the Toyota Camry. 

Shares of China's EV makers have cooled off this year despite their strong sales, and the U.S. EV market share dipped in early 2024 as well. XPeng shares are down 7% year-to-date, while Nio has shed 5%. Li Auto's stock is down 11% on the year. 

 

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Wind power is Competitive on Reliability and Resilience Says AWEA CEO

Wind farm reliability services now compete in wholesale markets, as FERC and NERC endorse market-based solutions that reward performance, bolster grid resilience, and compensate ancillary services like frequency regulation, voltage support, and spinning reserve.

 

Key Points

Grid support from wind plants, including frequency, voltage, ramping, and inertial response via advanced controls.

✅ Enabled by advanced controls and inverter-based technology

✅ Compete in market-based mechanisms for ancillary services

✅ Support frequency, voltage, reserves; enhance grid resilience

 

 

American Wind Energy Association CEO Tom Kiernan has explained to a congressional testimony that wind farms can now compete, as renewables approach market majority, to provide essential electric reliability services. 

Mr Kiernan appeared before the US Congress House Energy and Commerce Committee where he said that, thanks to technological advances, wind farms are now competitive with other energy technologies with regard to reliability and resiliency. He added that grid reliability and resilience are goals that everyone can support and that efforts underway at the Federal Energy Regulatory Commission (FERC) and by market operators are rightly focused on market-based solutions to better compensate generators for providing those essential services.

AWEA strongly agreed with other witnesses on the panel who endorsed market-based solutions in their submitted testimony, including the American Petroleum Institute, Solar Energy Industries Association, Energy Storage Association, Natural Resources Defence Council, National Hydropower Association, and others. However, AWEA is concerned that the Department of Energy’s recent proposal to provide payments to specific resources based on arbitrary requirements is anti-competitive, and threatens to undermine electricity markets that are bolstering reliability and saving consumers billions of dollars per year.

“We support the objective of maintaining a reliable and resilient grid which is best achieved through free and open markets, with a focus on needed reliability services – not sources – and a programme to promote transmission infrastructure.”

Kiernan outlined several major policy recommendations in his testimony, including reliance on competitive markets that reward performance to ensure affordable and reliable electricity, a focus on reliability needs rather than generation sources and the promotion of transmission infrastructure investment to improve resilience and allow consumers greater access to all low-cost forms of energy.

The CEO of the North American Electric Reliability Corporation (NERC) has recently testified that the state of reliability in North America remains strong and the trend line shows continuing improvement year over year. Technological advances and innovation by over 100,000 US wind workers enable wind farms today to provide the grid reliability services traditionally provided by conventional power plants. NERC’s CEO emphasised in its testimony at last month’s hearing that “variable resources significantly diversify the generation portfolio and can contribute to reliability and resilience in important ways.”

 

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Fact check: Claim on electric car charging efficiency gets some math wrong

EV Charging Coal and Oil Claim: Fact-check of kWh, CO2 emissions, and electricity grid mix shows 70 lb coal or ~8 gallons oil per 66 kWh, with renewables and natural gas reducing lifecycle emissions.

 

Key Points

A viral claim on EV charging overstates oil use; accurate figures depend on grid mix: ~70 lb coal or ~8 gallons oil.

✅ About 70 lb coal or ~8 gal oil per 66 kWh, incl. conversion losses

✅ EVs average ~100 g CO2 per mile vs ~280 g for 30 mpg cars

✅ Grid mix includes renewables, nuclear, natural gas; oil use is low

 

The claim: Average electric car requires equivalent of 85 pounds of coal or six barrels of oil for a single charge

The Biden administration has pledged to work towards decarbonizing the U.S. electricity grid by 2035. And the recently passed $1.2 trillion infrastructure bill provides funding for more electric vehicle (EV) charging infrastructure, including EV charging networks across the country under current plans.

However, a claim that electric cars require an inordinate amount of oil or coal energy to charge has appeared on social media, even as U.S. plug-ins traveled 19 billion miles on electricity in 2021.

“An average electric car takes 66 KWH To charge. It takes 85 pounds of coal or six barrels of oil to make 66 KWH,” read a Dec 1 Facebook post that was shared nearly 500 times in a week. “Makes absolutely no sense.” 

The post included a stock image of an electric car charging, though actual charging costs depend on local rates and vehicle efficiency.

This claim is in the ballpark for the coal comparison, but the math on the oil usage is wildly inaccurate.

It would take roughly 70 pounds of coal to produce the energy required to charge a 66 kWh electric car battery, said Ian Miller, a research associate at the MIT Energy Initiative. That's about 15 pounds less than is claimed in the post.

The oil number is much farther off.

While the post claims that it takes six barrels of oil to charge a 66 kWh battery, Miller said the amount is closer to 8 gallons  — the equivalent of 20% of one barrel of oil.

He said both of his estimates account for energy lost when fossil fuels are converted into electricity. 

"I think the most important question is, 'How do EVs and gas cars compare on emissions per distance?'," said Miller. "In the US, using average electricity, EVs produce roughly 100 grams of CO2 per mile."

He said this is more than 60% less than a typical gasoline-powered car that gets 30 mpg, aligning with analyses that EVs are greener in all 50 states today according to recent studies. Such a vehicle produces roughly 280 grams of CO2 per mile.

Lifecycle analyses also show that the CO2 from making an EV battery is not equivalent to driving a gasoline car for years, which often counters common misconceptions.

"If you switch to an electric vehicle, even if you're using fossil fuels (to charge), it's just simply not true that you'll be using more fossil fuel," said Jessika Trancik, a professor at the Massachusetts Institute of Technology who studies the environmental impact of energy systems.  

However, she emphasized electric cars in the U.S. are not typically charged using only energy from coal or oil, and that electricity grids can handle EVs with proper management.

The U.S. electricity grid relies on a diversity of energy sources, of which oil and coal together make up about 20 percent, according to a DOE spokesperson. This amount is likely to continue to drop as renewable energy proliferates in the U.S., even as some warn that state power grids will be challenged by rapid EV adoption. 

"Switching to an electric vehicle means that you can use other sources, including less carbon-intensive natural gas, and even less carbon-intensive electricity sources like nuclear, solar and wind energy, which also carry with them health benefits in the form of reduced air pollutant emissions," said Trancik. 

Our rating: Partly false
Based on our research, we rate PARTLY FALSE the claim that the average electric car requires the equivalent of 85 pounds of coal or six barrels of oil for a single charge. The claim is in the ballpark on coal consumption, as an MIT researcher estimates that around 70 pounds. But the oil usage is only about 8 gallons, which is 20% of one barrel. And the actual sources of energy for an electric car vary depending on the energy mix in the local electric grid. 

 

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4 European nations to build North Sea wind farms

North Sea Offshore Wind Farms will deliver 150 GW by 2050 as EU partners scale renewable energy, offshore turbines, grid interconnectors, and REPowerEU goals to cut emissions, boost energy security, and reduce Russian fossil dependence.

 

Key Points

A joint EU initiative to build 150 GW of offshore wind by 2050, advancing REPowerEU, decarbonization, and energy security.

✅ Targets at least 150 GW of offshore wind by 2050

✅ Backed by Belgium, Netherlands, Germany, and Denmark

✅ Aligns with REPowerEU, grid integration, and emissions cuts

 

Four European Union countries plan to build North Sea wind farms capable of producing at least 150 gigawatts of energy by 2050 to help cut carbon emissions that cause climate change, with EU wind and solar surpassing gas last year, Danish media have reported.

Under the plan, wind turbines would be raised off the coasts of Belgium, the Netherlands, Germany and Denmark, where a recent green power record highlighted strong winds, daily Danish newspaper Jyllands-Posten said.

The project would mean a tenfold increase in the EU's current offshore wind capacity, underscoring how renewables are crowding out gas across Europe today.

“The North Sea can do a lot," Danish Prime Minister Frederiksen told the newspaper, adding the close cooperation between the four EU nations "must start now.”

European Commission President Ursula von der Leyen, German Chancellor Olaf Scholz, Dutch Prime Minister Mark Rutte and Belgian Prime Minister Alexander De Croo are scheduled to attend a North Sea Summit on Wednesday in Esbjerg, 260 kilometers (162 miles) west of Copenhagen.

In Brussels, the European Commission moved Wednesday to jump-start plans for the whole 27-nation EU to abandon Russian energy amid the Kremlin’s war in Ukraine. The commission proposed a nearly 300 billion-euro ($315 billion) package that includes more efficient use of fuels and a faster rollout of renewable power, even as stunted hydro and nuclear output may hobble recovery efforts.

The investment initiative by the EU's executive arm is meant to help the bloc start weaning themselves off Russian fossil fuels this year, even as Europe is losing nuclear power during the transition. The goal is to deprive Russia, the EU’s main supplier of oil, natural gas and coal, of tens of billions in revenue and strengthen EU climate policies.

“We are taking our ambition to yet another level to make sure that we become independent from Russian fossil fuels as quickly as possible,” von der Leyen said in Brussels when announcing the package, dubbed REPowerEU.

The EU has pledged to reduce carbon dioxide emissions by 55% compared with 1990 levels by 2030, and to get to net zero emissions by 2050, with a recent German renewables milestone underscoring the pace of change.

The European Commission has set an overall target of generating 300 gigawatts of offshore energy of by 2050, though grid expansion challenges in Germany highlight hurdles.

Along with climate change, the war in Ukraine has made EU nations eager to reduce their dependency on Russian natural gas and oil. In 2021, the EU imported roughly 40% of its gas and 25% of its oil from Russia.

At a March 11 summit, EU leaders agreed in principle to phase out Russian gas, oil and coal imports by 2027.

 

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Electric Cars 101: How EV Motors Work, Tech Differences, and More

Electric Car Motors convert electricity to torque via rotor-stator magnetic fields, using AC/DC inverters, permanent magnets or induction designs; they power EV powertrains efficiently and enable regenerative braking for energy recovery and control.

 

Key Points

Electric car motors turn electrical energy into wheel torque using rotor-stator fields, inverters, and AC or DC control.

✅ AC induction, PMSM, BLDC, and reluctance architectures explained

✅ Inverters manage AC/DC, voltage, and motor speed via frequency

✅ Regenerative braking recovers energy and reduces wear

 

When was the last time you stopped to think about how electric cars actually work, especially if you're wondering whether to buy an electric car today? We superfans of the car biz have mostly developed a reasonable understanding of how combustion powertrains work. Most of us can visualize fuel and air entering a combustion chamber, exploding, pushing a piston down, and rotating a crankshaft that ultimately turns the wheels. We generally understand the differences between inline, flat, vee-shaped, and maybe even Wankel rotary combustion engines.

Mechanical engineering concepts such as these are comparatively easy to comprehend. But it's probably a fair bet to wager that only a minority of folks reading this can explain on a bar napkin exactly how invisible electrons turn a car's wheels or how a permanent-magnet motor differs from an AC induction one. Electrical engineering can seem like black magic and witchcraft to car nuts, so it's time to demystify this bold new world of electromobility, with the age of electric cars arriving ahead of schedule.

How Electric Cars Work: Motors
It has to do with magnetism and the natural interplay between electric fields and magnetic fields. When an electrical circuit closes allowing electrons to move along a wire, those moving electrons generate an electromagnetic field complete with a north and a south pole. When this happens in the presence of another magnetic field—either from a different batch of speeding electrons or from Wile E. Coyote's giant ACME horseshoe magnet, those opposite poles attract, and like poles repel each other.


 

Electric motors work by mounting one set of magnets or electromagnets to a shaft and another set to a housing surrounding that shaft. By periodically reversing the polarity (swapping the north and south poles) of one set of electromagnets, the motor leverages these attracting and repelling forces to rotate the shaft, thereby converting electricity into torque and ultimately turning the wheels, in a sector where the electric motor market is growing rapidly worldwide. Conversely—as in the case of regenerative braking—these magnetic/electromagnetic forces can transform motion back into electricity.

How Electric Cars Work: AC Or DC?
The electricity supplied to your home arrives as alternating current (AC), and bidirectional charging means EVs can power homes for days as needed, so-called because the north/south or plus/minus polarity of the power changes (alternates) 60 times per second. (That is, in the United States and other countries operating at 110 volts; countries with a 220-volt standard typically use 50-Hz AC.) Direct current (DC) is what goes into and comes out of the + and - poles of every battery. As noted above, motors require alternating current to spin. Without it, the electromagnetic force would simply lock their north and south poles together. It's the cycle of continually switching north and south that keeps a motor spinning.


 

Today's electric cars are designed to manage both AC and DC energy on board. The battery stores and dispenses DC current, but again, the motor needs AC. When recharging the battery, and with increasing grid coordination enabling flexibility, the energy comes into the onboard charger as AC current during Level 1 and Level 2 charging and as DC high-voltage current on Level 3 "fast chargers." Sophisticated power electronics (which we will not attempt to explain here) handle the multiple onboard AC/DC conversions while stepping the voltage up and down from 100 to 800 volts of charging power to battery/motor system voltages of 350-800 volts to the many vehicle lighting, infotainment, and chassis functions that require 12-48-volt DC electricity.

How Electric Cars Work: What Types Of Motors?
DC Motor (Brushed): Yes, we just said AC makes the motor go around, and these old-style motors that powered early EVs of the 1900s are no different. DC current from the battery is delivered to the rotor windings via spring-loaded "brushes" of carbon or lead that energize spinning contacts connected to wire windings. Every few degrees of rotation, the brushes energize a new set of contacts; this continually reverses the polarity of the electromagnet on the rotor as the motor shaft turns. (This ring of contacts is known as the commutator).

The housing surrounding the rotor's electromagnetic windings typically features permanent magnets. (A "series DC" or so-called "universal motor" may use an electromagnetic stator.) Advantages are low initial cost, high reliability, and ease of motor control. Varying the voltage regulates the motor's speed, while changing the current controls its torque. Disadvantages include a lower lifespan and the cost of maintaining the brushes and contacts. This motor is seldom used in transportation today, save for some Indian railway locomotives.

Brushless DC Motor (BLDC): The brushes and their maintenance are eliminated by moving the permanent magnets to the rotor, placing the electromagnets on the stator (housing), and using an external motor controller to alternately switch the various field windings from plus to minus, thereby generating the rotating magnetic field.

Advantages are a long lifespan, low maintenance, and high efficiency. Disadvantages are higher initial cost and more complicated motor speed controllers that typically require three Hall-effect sensors to get the stator-winding current phased correctly. That switching of the stator windings can result in "torque ripple"—periodic increases and decreases in the delivered torque. This type of motor is popular for smaller vehicles like electric bikes and scooters, and it's used in some ancillary automotive applications like electric power steering assist.


 

Permanent-Magnet Synchronous Motor (PMSM): Physically, the BLDC and PMSM motors look nearly identical. Both feature permanent magnets on the rotor and field windings in the stator. The key difference is that instead of using DC current and switching various windings on and off periodically to spin the permanent magnets, the PMSM functions on continuous sinusoidal AC current. This means it suffers no torque ripple and needs only one Hall-effect sensor to determine rotor speed and position, so it's more efficient and quieter.

The word "synchronous" indicates the rotor spins at the same speed as the magnetic field in the windings. Its big advantages are its power density and strong starting torque. A main disadvantage of any motor with spinning permanent magnets is that it creates "back electromotive force" (EMF) when not powered at speed, which causes drag and heat that can demagnetize the motor. This motor type also sees some duty in power steering and brake systems, but it has become the motor design of choice in most of today's battery electric and hybrid vehicles.


 

Note that most permanent-magnet motors of all kinds orient their north-south axis perpendicular to the output shaft. This generates "radial (magnetic) flux." A new class of "axial flux" motors orients the magnets' N-S axes parallel to the shaft, usually on pairs of discs sandwiching stationary stator windings in between. The compact, high-torque axial flux orientation of these so-called "pancake motors" can be applied to either BLDC or PMSM type motors.


 

AC Induction: For this motor, we toss out the permanent magnets on the rotor (and their increasingly scarce rare earth materials) and keep the AC current flowing through stator windings as in the PMSM motor above.

Standing in for the magnets is a concept Nikola Tesla patented in 1888: As AC current flows through various windings in the stator, the windings generate a rotating field of magnetic flux. As these magnetic lines pass through perpendicular windings on a rotor, they induce an electric current. This then generates another magnetic force that induces the rotor to turn. Because this force is only induced when the magnetic field lines cross the rotor windings, the rotor will experience no torque or force if it rotates at the same (synchronous) speed as the rotating magnetic field.

This means AC induction motors are inherently asynchronous. Rotor speed is controlled by varying the alternating current's frequency. At light loads, the inverter controlling the motor can reduce voltage to reduce magnetic losses and improve efficiency. Depowering an induction motor during cruising when it isn't needed eliminates the drag created by a permanent-magnet motor, while dual-motor EVs using PMSM motors on both axles must always power all motors. Peak efficiency may be slightly greater for BLDC or PMSM designs, but AC induction motors often achieve higher average efficiency. Another small trade-off is slightly lower starting torque than PMSM. The GM EV1 of the mid-1990s and most Teslas have employed AC Induction motors, despite skepticism about an EV revolution in some quarters.


 

Reluctance Motor: Think of "reluctance" as magnetic resistance: the degree to which an object opposes magnetic flux. A reluctance motor's stator features multiple electromagnet poles—concentrated windings that form highly localized north or south poles. In a switched reluctance motor (SRM), the rotor is made of soft magnetic material such as laminated silicon steel, with multiple projections designed to interact with the stator's poles. The various electromagnet poles are turned on and off in much the same way the field windings in a BLDC motor are. Using an unequal number of stator and rotor poles ensures some poles are aligned (for minimum reluctance), while others are directly in between opposite poles (maximum reluctance). Switching the stator polarity then pulls the rotor around at an asynchronous speed.


 

A synchronous reluctance motor (SynRM) doesn't rely on this imbalance in the rotor and stator poles. Rather, SynRM motors feature a more distributed winding fed with a sinusoidal AC current as in a PMSM design, with speed regulated by a variable-frequency drive, and an elaborately shaped rotor with voids shaped like magnetic flux lines to optimize reluctance.

The latest trend is to place small permanent magnets (often simpler ferrite ones) in some of these voids to take advantage of both magnetic and reluctance torque while minimizing cost and the back EMF (or counter-electromotive force) high-speed inefficiencies that permanent-magnet motors suffer.

Advantages include lower cost, simplicity, and high efficiency. Disadvantages can include noise and torque ripple (especially for switched reluctance motors). Toyota introduced an internal permanent-magnet synchronous reluctance motor (IPM SynRM) on the Prius, and Tesla now pairs one such motor with an AC induction motor on its Dual Motor models. Tesla also uses IPM SynRM as the single motor for its rear-drive models.


 

Electric motors may never sing like a small-block or a flat-plane crank Ferrari. But maybe, a decade or so from now, we'll regard the Tesla Plaid powertrain as fondly as we do those engines, even as industry leaders note that mainstream adoption faces hurdles, and every car lover will be able to describe in intimate detail what kind of motors it uses.
 

 

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Local study to look at how e-trucks might supply future electricity

Electrified Trucking Grid Integration explores vehicle-to-grid (V2G) strategies where rolling batteries backfeed power during peak demand, optimizing charging infrastructure, time-of-use pricing, and IESO market operations for Ontario shippers like Nature Fresh Farms.

 

Key Points

An approach using V2G-enabled electric trucks to support the grid, cut peak costs, and add revenue streams.

✅ Models charging sites, timing, and local grid impacts.

✅ Evaluates V2G backfeed economics and IESO pricing.

✅ Uses Nature Fresh Farms data for logistics and energy.

 

A University of Windsor project will study whether an electrified trucking industry might not only deliver the goods, but help keep the lights on with the timely off-loading of excess electrons from their powerful batteries via vehicle-to-grid approaches now emerging.

The two-year study is being overseen by Environmental Energy Institute director Rupp Carriveau and associate professor Hanna Moah of the Cross-Border Institute in conjunction with the Leamington-based greenhouse grower Nature Fresh Farms.

“The study will look at what happens if we electrified the transport truck fleet in Ontario to different degrees, considering the power demand for truck fleets that would result,” Carriveau said.

“Where trucks would be charging and how that will affect the electricity grid grid coordination in those locations at specific times. We’ll be able to identify peak times on the demand side.

“On the other side, we have to recognize these are rolling batteries. They may be able to backfeed the grid, sell electricity back to prop the grid up in locations it wasn’t able to in the past.”

The national research organization Mathematics of International Technology and Complex Systems (Mitacs) is funding the $160,000 study, and the Independent Electricity Systems Operator, a Crown corporation responsible for operating Ontario’s electricity market, amid an electricity supply crunch that is boosting storage efforts, is also offering support for the project.

Because of the varying electricity prices in the province based on usage, peak demand and even time of year, Carriveau said there could be times where draining off excess truck battery power will be cheaper than the grid, and vehicle-to-building charging models show how those savings can be realized.

“It could offer the truck owner another revenue stream from his asset, and businesses a cheaper electricity alternative in certain circumstances,” he said.

The local greenhouse industry was a natural fit for the study, said Carriveau, based on the amount of work the university does with the sector along with the fact it is both a large consumer and producer of electricity.

The study will be based on assumptions for electric truck capacity and performance because the low number of such vehicles currently on the road, though large electric bus fleets offer operational insights.

How will an electrified trucking industry affect Ontario’s electricity grid? University of Windsor engineering professor Rupp Carriveau is part of a new study on trucks being used to help deliver electricity as well as their products around Ontario. He is shown on campus on Tuesday, July 6, 2021.

How will an electrified trucking industry affect Ontario’s electricity grid? University of Windsor engineering professor Rupp Carriveau is part of a new study on trucks being used to help deliver electricity as well as their products around Ontario. He is shown on campus on Tuesday, July 6, 2021.

Nature Fresh Farms will supply all its data on power use, logistics, utility costs and shipping schedules to determine if switching to an electrified fleet makes sense for the company.

“As an innovative company, we are always thinking, ‘What is next?’, whether its developments in product varieties, technology or sustainability,” said company CEO Peter Quiring. “Green transportation is the next big focus.

“We were given the opportunity to work closely on this project and offer our operations as a case study to see how we can find feasible alternatives, not only for Nature Fresh Farms or even for companies in agriculture, but for every industry that relies on the transportation of their goods.”

Currently, Nature Fresh Farms doesn’t have any electrified trucks. Carriveau said the second phase of the study might actually involve an electric truck in a pilot project.

 

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