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In this paper, a new way of voltage transform is designed. It directly transforms the voltage of the PWM (Pulse Width Modulation) waves whose fundamental wave is sine wave. As the fundamental wave is sine wave with 50Hz, it uses the common cold-rolled silicon steel as transformer core, which significantly reduces the cost of the voltage conversion device and improves the reliability of the voltage...
Using three-phase permanent magnet AC motor (PM motor) as drive part of electric vehicle (EV), the motor must achieve zero speed braking when the vehicle brakes to stop on the slope. Braking force and motor rotation have the same direction when the vehicle is braking in the downhill; and the direction are opposite when braking in the uphill. Therefore, the general control strategy for PM motor cannot...
A new method to calculate the permanent magnet synchronous motor (PMSM) temperature rising in electric vehicle (EV) was proposed based on the stator resistance identification. The measure theory of the motor temperature rising with the stator resistance was discussed at firstly. A PMSM dynamic math model was built which was the research object. Then the resistance identification system model was built...
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