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This text aims to solve such problems as the large pulsation of battery electric locomotive traction motor torque at low speed, the unpredictable frequency spectrum of the torque, and the large frequency and wastage of high-speed inverter switching. Starting from space voltage vector, this text adopts the method of multiple vector synthesis and mutual switch control of motor air-gap flux according...
The three-level inverter and the combination of direct torque control method used in induction motor, designed a simple direct torque control method of twelve vector by use of diode-clamped three-level inverter, in the same as highly torque control accuracy. The result shows that it has simple, fast response, high torque control accuracy Benefits. The control scheme used in high voltage control motor...
Four-switch three-phase inverter (FSTPI) is usually adopted as the topology for continuous fault-tolerant operation of a direct torque (DTC) system when inverter fault occurs. Due to that the FSTPI can only provide four voltage space vectors with unequal amplitude, the DTC system performance will deteriorate to a certain extent. To enhance the performance of permanent magnet synchronous motor (PMSM)...
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