Description
SM070/60/020/P1/44/S1/B0 Schneider Motor
SM070/60/020/P1/44/S1/B0 Schneider Motor
Module Clips Drive controller servo moto
SM070/60/020/P1/44/S1/B0 Motor is a device that converts electrical energy into mechanical energy.
It uses energized coils (i.e. stator windings) to generate a rotating magnetic field and applies it to the rotor (such as a squirrel cage closed aluminum frame) to form a magnetic electric rotational torque.
SM070/60/020/P1/44/S1/B0 Electric motors are divided into DC motors and AC motors according to their power sources. Most electric motors in the power system are AC motors,
which can be synchronous motors or asynchronous motors (the stator magnetic field speed and rotor rotation speed of the motor do not maintain synchronous speed).
The SM070/60/020/P1/44/S1/B0 electric motor is mainly composed of a stator and a rotor. The direction of force movement of the energized wires in the magnetic field is related to the direction
of the current and the direction of the magnetic field lines (magnetic field direction). The working principle of an electric motor is that the magnetic field exerts force on the current, causing the motor to rotate.
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The back EMF waveform is different:
BLDC: Approximate trapezoidal wave (ideal state);
PMSM: sine wave (ideal state);
The three-phase current waveforms are different:
BLDC: Approximate square wave or trapezoidal wave (ideal state);
PMSM: sine wave (ideal state);
Differences in control systems:
BLDC: usually includes position controller, speed controller and current (torque) controller;
PMSM: Different control strategies will have different control systems;
Controls are different:
BLDC: 120-degree square wave current, using PWM control;
PMSM: Positive Xuan wave current, controlled by SPWM SVPWM.
However, in actual control, brushless DC can also be controlled by FOC, and permanent magnet synchronous motors can also be controlled by square waves.
Just like the controllers of electric vehicles, I have disassembled and studied three or four. The interfaces are all the same, the control chips are different, and of course the control algorithms are also different. Electric vehicles controlled by sine waves have very low sound when starting and running, and there is no jitter during operation; but electric vehicles controlled by square waves have very obvious sounds, and the jitter during operation can also be felt. The judder is due to definite torque ripples.
Motors controlled by square waves have higher power efficiency, because motors controlled by sine waves have a lower effective voltage.
4. Control technology of permanent magnet synchronous motor
Permanent magnet synchronous motors and brushless DC motors can be operated using the same control method.
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