PWM and DC Busbar Voltage

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Maverickmax

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Hi

I have set a microcontroller up to produce 3 phase for AC motor and I have noticed that the recurring noise patterns appears on my oscilloscope when I put my probed on the zero voltage busbar. Why is that? How to remove this problem?

MM
 

1- what kind of microcorntroller do you use?
PIC is better in this category

2- you can seperate the analog GND and the digital GND
its very important

regards
 

to amiralib:

why is it important to seperate the analog GND and the digital GND ???
 

hey ..Can anybody plz tell me...how can i control ...motor direction using the H-bridge...drive..sth,,LD319..sth like that..i m stuck???/
 

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