Abstract
The switching frequency of two-level VSI is usually limited to a very low level for high-power drives to minimize the switching losses. For the synchronized SVPWM under low switching frequency, there will be a relative deviation of fundamental amplitude between the output voltage and the reference voltage. To solve this problem, in this paper, a method to calculate the amplitude of output phase voltage harmonics under synchronized SVPWM is proposed, and an online fundamental amplitude correction method is proposed based on this calculation result.
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