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How to improve EV traction motor efficiency

Charged EVs

The CVT4EV is a continuously variable transmission with a pushbelt that Bosch says can increase the efficiency of light commercial EVs by more than 4 percent. Worse still is that the losses in a magnetic material tend to increase at an exponential rate with frequency and flux swing (typically to the 1.5-2.5 kW of loss at 9,000 RPM.

Motoring 101
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Using the PHEV (Plug-In Hybrid Electric Vehicle) to Transition Society Seamlessly and Profitably From Fossil Fuel to 100% Renewable Energy

Green Car Congress

If in addition to normal electric use in homes such as lights and appliances, we charge the PHEV cars at 2 kW at the appropriate times, we could increase the utility factor of the already-installed wires in homes to more than 25%, still leaving plenty of safety margin and capacity. This bit of advanced technology can be low cost at low power.

PHEV 150