Description
hardware flow control. It is an ideal choice in the field of industrial automation.
The most fundamental reason for distinguishing these two motor types is that the
design of the air gap magnetic field is different. So the following differences arise
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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CP405 A0 1SAP500405R0001 ABB
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DSPC172 57310001-ML ABB
DSPC172H 57310001-MP/2 ABB
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DSPC454 57310303-F/3 ABB
3BHB003149P104 GVC707AE01 ABB
3BHB003149P201 GVC707AE01 ABB
3BHB003154R0101 GVC707AE01 ABB
3BHB003149P104 IGCT module ABB
3BHB003149P201 IGCT module ABB
GVC707AE01 IGCT module ABB
3BHB003154R0101 IGCT module ABB
3BHB003688R0101 Control circuit board
3BHB003689 IGCT module ABB
3BHB003152P104 GVC700AE01 ABB
3BHB003152P201 GVC700AE01 ABB
3BHB004027R0101 GVC700AE01 ABB
3BHB003152P104 IGCT moduleABB
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3BHB005171R0101 IGCT moduleABB
3BHB005171R0101 CVC750AE101 ABB
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3BHE027632R0101 Control circuit boardABB
GVC736CE101 IGCT module ABB
3BHE039203R0101 IGCT module ABB
3BHL000986P0006 IGCT module ABB
3BHE039203R0101 GVC736CE101 ABB
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UNS0121A-Z,V1 controller ABB
ABB UNITROL 1010
UNITROL 1010 3BHE035301R1002
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UNITROL 1020 3BHE030579R0003
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