99% vw 100% PWM, does it make a difference?

[Lebowski]

just to belabor the point ...

@Lowboski - Infineon Hybridpack for EV application uses a 2nd order filter, with a whopping 70uS group delay. not sure i agree with this approach but they don't seem to mind. i've attached the bode plot so you can see their frequency response. FYI, they expect their current sensor to produce 5V full scale at phase current sense input, but i am simualing with 1Vac so you can see the transfer function for what it is. nice flat gain up to about 1.5kHz which is perfect and then sharp attentuation for switching frequency and higher frequency noise due to rise/fall of mosfet which is >100khz, so these parts are nice. but the group delay... yikes.

Yeah 70usec is quite a lot. Not much compared to the 500 to 1000 usec of a motor, but then again the
FOC takes care of the motors group delay... 70usec means about 45deg at 2.2kHz so I'm guessing they're
not running at 120kerpm
You never know though, if all the current sensors have the same filters you can compensate for the delay
in the digital domain...
I prefer to have little analog filtering and then take care of it in the digital (control)loop filter.