Electric Vehicle Drive System
The electric drive systems operate at optimized voltage levels for efficient DC fast charging. The traction motors usually employ permanent magnet synchronous motors or AC induction motors. Both types can output torque over a wide range of rotational speeds, and even reach the peak torque at zero rotational speed. The switching strategy of the inverter not only improves efficiency but also reduces noise. On the other hand, the rotor position sensing technology ensures precise field-oriented control, thereby achieving smooth driving experience and efficient regenerative braking.
Hybrid Electric Drive Systems
Hybrid electric drive systems combine an internal combustion engine with electric machines to improve fuel efficiency. In parallel hybrids, a traction motor between the engine and transmission provides torque assist, regenerative braking, and launch capability. The hybrid control unit coordinates torque requests and battery state for seamless transitions. The key components here include the power distribution unit and the DC-DC converter. Both of them have been specially designed to be able to withstand the high temperatures and vibrations in the engine compartment.