Brushless DC permanent magnet motor and self-controlled permanent magnet synchronous motor
The brushless DC permanent magnet motor (BLDCM) and the self-controlled permanent magnet synchronous motor (PMSM) basically have the same structure with respect to the motor body: the three-phase armature winding is disposed on the stator, and the permanent magnet pole is disposed on the rotor. However, in terms of its operating principle and control mode, the brushless DC permanent magnet motor (BLDCM) is different from the self-controlled permanent magnet synchronous motor (PMSM). Today Ms. participates in the sharing and sharing of the differences between the two fields of magnetic field and application.
BLDCM is the English abbreviation of BrushlessDirectCurrentMotor; PMSM is called permanentmagnetsynchronousmotor, which is permanent magnet synchronous motor. The difference between the two magnetic fields
In general, if the three-phase armature winding of the motor is connected to a unipolar non-bridge electronic commutation (phase) circuit, or to a 120° conduction half-bridge inverter circuit; the driving voltage is a DC rectangle Wave voltage, it is hoped that the magnetic pole of the permanent magnet of the rotor can generate a magnetic field close to a rectangular wave or a trapezoidal wave in the working air gap, thereby inducing a counter electromotive force close to a rectangular wave or a trapezoidal wave in the armature winding; when the motor is running, the three-phase armature The winding is usually turned on in one phase and one phase, or two-phase two-phase turns on, generating a "jumping" rotating magnetic field in the working air gap. We call such a permanent magnet motor a brushless DC permanent magnet motor. Referred to as brushless DC motor (BLDCM).
In general, if the three-phase armature winding of the motor is connected to a 180° conduction type half-bridge inverter circuit; the driving voltage is a pulse voltage modulated via a sinusoidal pulse width, or a pulse voltage modulated via a space vector pulse width. It is hoped that the magnetic pole of the permanent magnet of the rotor can generate a magnetic field close to a sinusoidal waveform in the working air gap, thereby inducing a back electromotive force close to a sinusoidal waveform in the armature winding; when the motor is running, the three-phase armature winding is simultaneously turned on, at the working gas A "continuous" circular rotating magnetic field is generated in the gap. We call such a permanent magnet motor a self-controlled permanent magnet synchronous motor (PMSM).
