# 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:** 7
### Author: ![RaphZufferey](https://community.simplefoc.com/letter_avatar_proxy/v4/letter/r/9dc877/32.png) [@RaphZufferey](https://community.simplefoc.com/u/RaphZufferey) #### Post date: [September 25, 2023, 8:40am UTC](https://community.simplefoc.com/t/challenges-going-faster-than-certain-rpm/1688/7 "2023-09-25T08:40:34Z")
Hello !! I’ve been able to successfully run full FOC on the G431B-ESC board with an SPI magnetic sensor (AS5047) a 1 MHz thanks to all the great tips I could find on this forum ([https://community.simplefoc.com/t/b-g431b-esc1-beginner-guide-i2c-guide/515/91](https://community.simplefoc.com/t/b-g431b-esc1-beginner-guide-i2c-guide/515/91)). Motor is 100W AT2303 1500KV. While operation at low RPMs runs smoothly after tuning, I can’t achieve speeds beyond 750 rad/s. As I increase velocity, current draw also increases as expected (all below 1A). Going beyond 600-800 rad/s, the current suddenly jumps to the power source limit (3A), the motor becomes very noisy and the reported speed actually decreases (and doesn’t reach the target). For my application, I would need to go to 1500 rad/s. Is there any tips you would have to reach that? I am open to any changes, going open loop at high speed or even switching to 6 step control etc… --- _[View the full topic](https://community.simplefoc.com/t/challenges-going-faster-than-certain-rpm/1688)._