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.
Display operation panel INPCI01
Display operation panel INPBS01
Display operation panel INNTP01
Display operation panel INNPM22
Display operation panel INNPM22
Display operation panel INNPM22
Display operation panel INNPM22
Display operation panel INNPM12
Display operation panel INNPM12
Display operation panel INNPM12
Display operation panel INNPM11
Display operation panel INNPM01
Display operation panel INNIS21
Display operation panel INNIS21
Display operation panel INNIS21
Display operation panel INNIS11
Display operation panel INNIS11
Display operation panel INNIS11
Display operation panel INNIS01
Display operation panel INNIS01
Display operation panel INNIS01
Display operation panel INLIM03
Display operation panel INLIM02
Display operation panel INIT03
Display operation panel INIT03
Display operation panel INIPT02
Display operation panel INIPT01
Display operation panel INIIT14
Display operation panel INIIT13
Display operation panel INIIT13
Display operation panel INIIT12
Display operation panel INIIT03
Display operation panel INIIT03
Display operation panel INIIT02
Display operation panel INIIT01
Display operation panel INIET800
Display operation panel INICT13A
Display operation panel INICT13A
Display operation panel INICT13
Display operation panel INICT12
Display operation panel INICT03A
Display operation panel INICT03A
Display operation panel INICT03
Display operation panel INICT03
Display operation panel INICT01
Display operation panel INICT01
Display operation panel INICT01
Display operation panel INICT01
Display operation panel INFBA01
Display operation panel INFBA01
Display operation panel INDDM01
Display operation panel INDDM01
Display operation panel INBTM01
Display operation panel INBTM01
Display operation panel INBIM02
Display operation panel INBIM02
Display operation panel IMUSM01
Display operation panel IMUSM01
Display operation panel IMTSA01
Display operation panel IMTSA01
Display operation panel IMSPM01
Display operation panel IMSPM01
Display operation panel IMSET01
Display operation panel IMSET01
Display operation panel IMSET01
Display operation panel IMSET01
Display operation panel IMSER02
Display operation panel IMSER02
Display operation panel IMSED01
Display operation panel IMSED01
Display operation panel IMSED01
Display operation panel IMSED01
Display operation panel IMRIO02
Display operation panel IMRIO02
Display operation panel IMRIO02
Display operation panel IMRI002
Display operation panel IMRDO01
Display operation panel IMRDO01
Display operation panel IMRDI13
Display operation panel IMRDI13
Display operation panel IMRDI01
Display operation panel IMRDI01
Display operation panel IMRCC02
Display operation panel IMRCC02
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