Carrier frequency impact on inverters and motors - News - Global IC Trade Starts Here Free Products

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1. The influence of carrier frequency on the output current of the inverter (1) The higher the operating frequency, the larger the duty ratio of the voltage wave, and the smaller the harmonic component of the current, that is, the higher the carrier frequency, the smoother the current waveform. (2) The higher the carrier frequency, the smaller the current allowed by the inverter; (3) The higher the carrier frequency, the smaller the capacitive reactance of the wiring capacitor (because Xc = 1/2Ï€fC), the leakage caused by the high frequency pulse The higher the current. 2. Influence of carrier frequency on the motor The higher the carrier frequency, the smaller the vibration of the motor, the smaller the running noise, and the less the motor generates heat. However, the higher the carrier frequency, the higher the frequency of the harmonic current, and the more severe the skin effect of the motor stator. The larger the motor loss, the smaller the output power. 3. Influence of carrier frequency on other devices The higher the carrier frequency, the more severe the interference of high-frequency voltage through electrostatic induction, electromagnetic induction, electromagnetic radiation, etc. on electronic equipment. 4. The influence of carrier frequency on the inverter itself The larger the carrier frequency, the larger the loss of the inverter and the smaller the output power. If the ambient temperature is high, the dead zones of the two upper and lower inverter tubes of the inverter bridge will become smaller during the alternate conduction process. In severe cases, the bridge arms may be short-circuited and damage the inverter.