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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IS200EISBH1A Exciter ISBus board
IS200EHPAG2D pulse amplifier module
IS200EHPAG1C excitation high voltage pulse amplifier
IS200EHPAG1D high voltage gate pulse amplifier
IS200EHPAG1B high voltage pulse amplifier board
IS200EHPAG1A pulse amplifier board
IS200EHFCH2A excitation fan control
IS200EHFCH1A exciter fan control board
IS200EGPAG1B Temperature monitoring module
IS200EGPAG1A Temperature monitoring module
IS200EGDMH1A Ground detection board
IS200EDSLH2A transmission control unit
IS200EDSLH1A dual voltage regulator
IS200EDFFH3A DC feedback board
IS200EDFFH2A excitation module
IS200EDFFH1A Interface board
IS200EDEXG2B degaussing module
IS200EDEXG2A exciter board
IS200EDEXG1A communication card
IS200EDEXG1B excitation module
IS200EDCFG1B I/O terminal board
IS200EDCFG1A DC feedback board
IS200ECTXG1A Exciter CT expansion board
IS200ECTBG1A Output and input modules
IS200ECTBG2A contact terminal board
IS200EBRGH2A Interface board
IS200EBRGH1A Excitation bridge interface board
IS200EBKPG1C Backplane control board
IS200EBKPG1B exciter backplane control board
IS200EBKPG1A Excitation control backplane
IS200EBACG1A Digital controller
IS200EAUXH1A digital controller
IS200EACFG3A feedback board
IS200EACFG3B exciter AC feedback board
IS200EACFG2B excitation control module
IS200EACFG2A actuator AC feedback board
IS200EACFG1B exciter module
IS200EACFG1A AC feedback board
IS200DSPXH2D processor control board
IS200DSPXH1D digital signal processor control board
IS200DSPXH1C processor controller
IS200DSPXH1B digital signal processor board
IS200DSPXH1A digital signal controller
DS2020DACAG2 EX2100 series power module
DS2020DACAG1 Power module
IS420YDOAS1B I/O Ethernet network
IS420YAICS1B simulates I/O
IS420UCSDH1A quad-core controller
IS420UCSCH1B Balance controller
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