Power converters
Požadavky na absolvování
Power semiconductor converters for vehicles with electric or hybrid drive. Traction inverters for supplying the electric motor from the traction battery.
1. Introduction
Variable-speed drive
- Variable-speed electric drives always consist of an electric motor, a power semiconductor converter and a control unit with control algorithms.
- The power converter provides a controlled 3-phase voltage (voltage and frequency control).
- Together with the control algorithms, the power inverter provides torque control or higher speed control.
- For electric and hybrid cars, the power converter provides the interface and power transfer between the DC source (traction battery) and the electric motor.
Constant-speed electric drive
- The electric motor is directly connected to a constant voltage and frequency AC source (ie 3f of the mains).
- Constant speed of the stator magnetic flux, unregulated speed, unregulated torque.
