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  • No : 21549
  • Release Date : 2018/08/22 16:28
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Soft-PWM

What is Soft-PWM control used with the FR-A500 series?
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Answer

The inverter uses PWM control to change the output voltage and frequency to vary the motor speed.
PWM stands for Pulse Width Modulation.
Voltage is chopped into pulses to vary and the chopping frequency is called width modulation frequency (carrier frequency). This carrier frequency component noise (magnetic noise) is heard from the motor.

The A500 series uses the Mitsubishi proprietary PWM control width modulation method to disperse this magnetic noise over a wide frequency range from low to high frequency. This makes the motor noise gentle to the ear.
In addition, as the inverter is controlled with a low carrier frequency, both the noise and leakage current are suppressed to the same level as our FR-Z series inverter. The A500 series is initially set to use this Soft-PWM control.
Product Name
Inverter, magnet motor drive
Product Category
Inverter
Series
FR-E500, FR-A500

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