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I was referring to one of the following documents AN93637 - PSoC® 4 Sensorless Field-Oriented Control (FOC) | Cypress Semiconductor
My main doubt is whether the Sensorless FOC applicable to BLDC motors as well? I assume that BLDC motors are different from PMSM motors in terms of Back EMF for the former it is Trapezoidal and for the later it is sinusoidal. Please help.
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PSoC 3
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Hi,
Ideally you will never get actual trapezoidal waveform[with proper edge] out of a BLDC.
As the wiring get better the motor become more FOC from BLDC.
For BLDC motors recommended algorithm is to use Back emf method for sensorless [simple algorithm and circuitry as well] approach. The FOC algorithm can probably make the motor run but wouldn't get any FOC specific features.
AN93637 PSoC 4 Sensorless Field-Oriented Control (FOC).zip (PSoC Creator 3.1)
Here in this zip you can find example for BackEmf method as well.
Jobin GT
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Hi,
Ideally you will never get actual trapezoidal waveform[with proper edge] out of a BLDC.
As the wiring get better the motor become more FOC from BLDC.
For BLDC motors recommended algorithm is to use Back emf method for sensorless [simple algorithm and circuitry as well] approach. The FOC algorithm can probably make the motor run but wouldn't get any FOC specific features.
AN93637 PSoC 4 Sensorless Field-Oriented Control (FOC).zip (PSoC Creator 3.1)
Here in this zip you can find example for BackEmf method as well.
Jobin GT