# Challenges going faster than certain rpm

**URL:** https://community.simplefoc.com/t/challenges-going-faster-than-certain-rpm/1688
**Category:** Uncategorized
**Created:** [February 9, 2022, 9:54pm UTC](https://community.simplefoc.com/t/challenges-going-faster-than-certain-rpm/1688 "2022-02-09T21:54:33Z")
**Posts on this page:** 1
**Showing post:** 18

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### Author: ![Candas1](https://community.simplefoc.com/user_avatar/community.simplefoc.com/candas1/32/5296_2.png) [@Candas1](https://community.simplefoc.com/u/Candas1)
#### Post date: [September 26, 2023, 2:01pm UTC](https://community.simplefoc.com/t/challenges-going-faster-than-certain-rpm/1688/18 "2023-09-26T14:01:20Z")

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I have discussed this topic with @dekutree64 offline.  
FOC would need to extrapolate the position based on a delay/lag.  
That’s one of the effects I wanted to highlight in this [post](https://community.simplefoc.com/t/highly-scientific-foc-simulation/3901).

 ![image](https://community.simplefoc.com/uploads/default/original/2X/f/fcc96401c63da03c8a89bf90f21bc72fdab5d3a0.png)  
It’s much more visible on slow hardware and as the speed increases of course.

One workaround in voltage mode could be to use the lag compensation and tweak the phase\_inductance to also compensate for the delay.

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