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Mono inverter multi-parallel permanent magnet synchronous motor: structure and control strategy

Mono inverter multi-parallel permanent magnet synchronous motor: structure and control strategy

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© The Institution of Engineering and Technology
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This study presents a new and original Mono inverter multi-parallel permanent magnet synchronous motor (PMSM) system. To obtain the stability of such a system, each of the motor synchronisms should always be respected regardless of their load torque. In this case, only one motor, called ‘master motor’, will be self-piloted. If the chosen master motor is the one with the highest applied load torque, synchronism is respected for each of the motors. To find this machine, a solution that compares the rotor positions is thus developed. Experimental results are given for a system with two PMSM plugged in parallel. The proposed solution can, however, be applied to systems whatever the motor numbers; therefore additional simulations are provided for a four-PMSM system.

Inspec keywords: invertors; synchronous motors; machine control; permanent magnet motors; rotors

Other keywords: master motor; PMSM system; rotor; monoinverter multiparallel permanent magnet synchronous motor; motor synchronisms; load torque; control strategy; controller

Subjects: Control of electric power systems; Synchronous machines; Power convertors and power supplies to apparatus

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