This paper proposes a transformation matrix to generate two phase reference voltage signals for Four Switch Three Phase Inverter (FSTPI) using vector control. The feasibility of the control strategy is verified by proving the power invariance before and after the transformation. Simulation and experimental results have verified the validity and effectiveness of the proposed method to obtain instantaneous response in different operating conditions and provide fast speed response.
This paper proposes a field-weakening control strategy to optimize the torque production and motor efficiency of a four-switch three-phase inverter-fed induction motor drive in the high-speed region. A method to control the torque component current (I q ) and the flux component current (I d ) of the field-weakening region is proposed. The feasibility of the proposed control strategy is verified through a simulation and validated experimentally. The results show that the speed-torque characteristics and the motor efficiency are improved in the high-speed region.
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