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Raser and FEV to Develop Plug-in Hybrid Demo Vehicle Using Symetron Motor

Raser Technologies has appointed FEV Engine Technology as the integrator for an advanced plug-in-hybrid electric demonstration vehicle that incorporates a Raser Symetron electric motor and power electronic drive powertrain technology. The vehicle is targeted to achieve more than 100 mpg for the typical American driver.

Symetron is an umbrella label for several Raser innovations in motors and controllers that increase power, torque and efficiency. The Symetron technology, which can be applied in a range of packages, AC or DC, can deliver the high torque of a permanent magnet motor without the use of permanent magnets—in essence, enabling the production of smaller, more powerful and less expensive motors. (Earlier post.)

In 2006, Raser Technologies unveiled a new 100kW AC induction-based electric motor design called the Symetron P-100. The P-100 is designed to double the performance of the company’s award-winning P-50 integrated starter alternator, and is targeted at plug-in hybrids and EVs, among other applications. (Earlier post.)



Raser can pack massive power into tiny motors. I'd really like to see their products get used in EVs and PHEVs.

Harvey D


Any idea of the hp/lb (or KW/Kg) and % efficiency of their P-50 and P100?


That information may be here?


Sorry, couldn't find it myself.

Roger Pham

"Any idea of the hp/lb (or KW/Kg) and % efficiency of their P-50 and P100?"

For the P-50, it's 1 hp/lb and around 94% efficiency, according to the previous posting on the same subject. See:



Their P-2 motor achieved something insane - along the lines of 500 horsepower with a motor that weighs 147 pounds. Add on the weight of the needed controllers - their controllers weigh 6.8kg and handle 180kW. Figure about two of those to be conservative (29.92 pounds) plus the motor weight, and that's still an insane power/weight ratio of 4.62kW/kg, or 2.82hp/lb.


PMLFightlink (of in-wheel motor infamy) claims a similar power density of 4.8kW/kg, but while using much smaller motors and permanent magnet technology.

Yet to be a public demonstration of either, however.


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