The prevalence of EMI noise problems has been considered many times over the past few years, in inverter fed motor control systems. The advent of high speed power devices, and the high dv/dt of switching devices, has resulted in EMI problems and leakage current. This paper describes the application of the newly developed EMI reduction technique of SVPWM in induction motor drives. This newly developed common mode voltage reduction SVPWM technique does not use any zero-voltage vector states for inverter control, hence can restrict the common mode voltage more efficiently than the conventional PWM technique. The validity of the proposed technique is verified through simulation and experimental results. In this paper, by applying the vector control system, the proposed technique is presented as superior in reducing EMI and equal control performance, compared to the conventional space-vector PWM technique.
With the advent of fast power devices, the high W d t produced by PWM inverters have been found to cause EM1 noise, shaft voltage and bearing current.This paper describes the application of newly developed conducted EM1 reduction technique of S V P W M in induction motor drives. The newly developed common mode voltage reduction SVPWM technique doesn't use any zero-voltage vector states for inverter control, hence it can restrict the common mode voltage better than conventional PWM technique. The validity of the proposed technique by software approach is verified through simulation and experiments1 results.
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