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Is permanent magnet synchronous motor powered by DC power or AC power?

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05-30
Permanent magnet synchronous motors are AC motors that require AC power supply.
motor
The stator of a permanent magnet synchronous motor generates a rotating magnetic field through three-phase alternating current, thereby driving the motor to rotate.

A square wave driven permanent magnet synchronous motor can also be considered as a type of brushless DC motor because it drives the motor to rotate through square wave current.

However, it should be noted that the control method of this motor is slightly different from traditional brushless DC motors, as it requires the use of PWM technology to generate square wave currents.

The permanent magnet synchronous motor driven by sine wave requires the use of an AC power supply, as sine wave is an AC waveform. The stator of this motor generates a rotating magnetic field through three-phase sine wave alternating current, thereby driving the motor to rotate.

Both square wave and sine wave driven permanent magnet synchronous motors require AC power supply and belong to the category of AC motors.
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    • Darren

      05-31
      Permanent magnet synchronous motors are classified according to their power supply frequency: permanent magnet brushless DC motors (supplied by square wave inverters) and permanent magnet brushless AC motors (supplied by sine wave inverters), both of which require variable frequency power supply during motor operation.
According to the distribution of air gap magnetic field, it is divided into sine wave permanent magnet synchronous motors (referred to as permanent magnet synchronous motors) and trapezoidal wave permanent magnet synchronous motors (brushless DC motors).
A permanent magnet synchronous motor is an AC motor powered by an AC power source, but a brushless DC motor can be directly powered by a DC power source. If an AC power source is used, it must first be converted into DC power through a converter and input into the driver power supply. Finally, the converter converts the DC voltage into three-phase voltage to drive the motor. Therefore, the final drive for the motor is still AC power.
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