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In this paper a new PWM strategy which minimizes the output current ripple for five-phase inverters is analytically determined. The optimization procedure is applied in each switching period, therefore its validity is not restricted to sinusoidal operations. The effectiveness of the proposed PWM strategy is proved by numerical simulations and experimental tests.
Nowadays, there is an increasing interest toward multiphase drives, particularly for medium- and high-power applications. In this paper, some modulation strategies for multiphase voltage-source inverters are compared and the modulation strategy with the minimum switching losses is determined. If the switching devices of the inverter are insulated-gate bipolar transistors or bipolar junction transistors,...
In this paper some different control strategies, suitable for open-phase fault operation of seven-phase current regulated induction motor drives, are presented. These strategies, which are valid in steady-state as well as in transient operating conditions, are compared in terms of stator and rotor copper losses and torque pulsations. The comparison is carried out by means of an opportune mathematical...
Nowadays there is an increasing attention towards multiphase drives, especially for medium and high power applications. In this paper some modulation strategies for M-phase inverters are compared and the modulation strategy with the minimum switching losses is determined. If the switching devices of the inverter are IGBTs or BJTs, this modulation strategy turns out to be the one with the minimum total...
In this paper the problem of the modulation strategy of a five-phase inverter is completely solved using the duty-cycle space vector approach. Furthermore, the inverter voltage limit, under different operating conditions, with sinusoidal or non-sinusoidal output currents, is determined. The analytical approach is confirmed by experimental tests.
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