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How to use the current sens amp for PWM motor application?

Question asked by moto on May 12, 2014
Latest reply on May 20, 2014 by moto

Hi

I would like to know how to use current sense amp in PWM motor drive system.

For example, AD8418 has a peak output by input common-mode step response.
AD8418A,AD8417, AD8210 .... also.
(see AD8418 datasheet Fig.18)

These noise are tough to erase by LPF.
I don't know how to erase these noise.

One idea is to use the differential signal from 2 phase current sense amp outputs.
I don't know if it is good or not. and it is hard to use.

 

Could I see the recommended circuit?

 

 

Regards
moto


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