Optimal common-mode voltage reduction PWM technique for induction motor drives with considering the dead-time effects for inverter control

Parallel-connected four-pole inverters (FPIs) becomes an important application in three-phase four-wire uninterrupted power system, owing to the benefits like high reliability, cost-effective and the convenient expansion of power capacity. Nevertheless, such parallel connection would lead to the sideeffects, just as the circulating current, accompanied by extra loss and current distortion. The difference of common mode voltages (CMV) significantly causes the circulating current, and associated with the switching states and injected offset of scalar PWM. Therefore, this paper respectively investigate the conventional three-dimension pulse width modulation (3-D PWM) and the recently developed 3-D reduced-CMV PWM (3-D RCMVPWM), and evaluate the performance on mitigating circulating current. The overall researches are established on a two-module parallel connected system, and the mathematical model is made to discuss the phenomenon of circulating current. Besides, the experiment results are supported to validate the analysis and evaluation of 3-D PWM in various conditions. Index Terms-Three-phase four-wire, four-pole inverter (FPI), parallel connection, circulating current, common mode voltage (CMV), three-dimension (3-D), pulse width modulation (PWM), SVPWM, AZSPWM, DPWM1, NSPWM.

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Common-mode voltage reduction PWM technique for wide speed range control of induction motor drives fed by inverter with diode front end

Lai

Chen²,

Lee³

et al.

38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.

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Optimal common-mode voltage reduction PWM technique for induction motor drives with considering the dead-time effects for inverter control

Cited by 8 publications

References 20 publications

A nonzero vector PWM method to reduce common-mode voltage

A nonzero vector PWM method to reduce common-mode voltage

Evaluation of PWM methods for suppressing circulating current among parallel connected four-pole inverters

Common-mode voltage reduction PWM technique for wide speed range control of induction motor drives fed by inverter with diode front end

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