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【 Dc fan 】 Cost of inverter

by:TOCH     2021-01-27
【 Dc fan 】 The inverter cost of
need rectangular wave current brushless dc motor (BLDCM), the current rating of the inverter for runtime refers to the rectangular wave peaks. Induction motor need to sine wave current, the current rating of the inverter for runtime generally refers to the effective value of the sine wave. To keep the inverter's ability to control the motor current and dc voltage inverter and motor should be enough difference between induced electromotive force. So the trapezoidal brushless dc motor (BLDCM) wave induced electromotive force and induction motor sine wave induced electromotive force can achieve peak are limited to the inverter dc voltage. In this case, if the assumption of brushless dc motor and induction motor current peak is equal, is 33% higher than that of the former power output than the latter, that is to say, the same rectifier/inverter to drive more than 33% higher than that of induction motor output power of the brushless dc motor.

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