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When starting PWM, a zero combination of Hall sensor states appears

aPott.1
Associate II

Hello! I use B-G431-ESC1 inverter board. Type of motor is BLDC. When I rotate the motor manually with PWM off, there is no such position at which all hall sensors have a zero state, and it is right. I control the states of the sensors in debug mode.

After sending the start command and the start of movement, a zero combination of states appears. 0693W00000QNZpEQAX.pngWhat could be the reason?

1 REPLY 1
Gigi
ST Employee

Ciao

It is possible that some noise glitches in the inputs make this reading wrong?

If it is the case you can try to implement a sort of digital filter reading the input more times before to ***** a low or high state.

Ciao

Gigi