# Noisy motor at 0 current **URL:** https://community.simplefoc.com/t/noisy-motor-at-0-current/6992 **Category:** hardware support **Tags:** noise, drv8323, stm32 **Created:** [March 28, 2025, 1:13pm UTC](https://community.simplefoc.com/t/noisy-motor-at-0-current/6992 "2025-03-28T13:13:33Z") **Posts on this page:** 1 **Page:** 1
### Author: ![MadsHoeffer](https://community.simplefoc.com/letter_avatar_proxy/v4/letter/m/45deac/32.png) [@MadsHoeffer](https://community.simplefoc.com/u/MadsHoeffer) #### Post date: [March 28, 2025, 1:13pm UTC](https://community.simplefoc.com/t/noisy-motor-at-0-current/6992/1 "2025-03-28T13:13:33Z")
Hi everyone, Long time lurker and a big fan of the work you have done! Disclaimer I am running custom firwmare and not using SimpleFOC, but this forum has been a great knowledge base in learning about FOC and I am hoping someone here can guide me. I’m facing an issue on a custom board using a DRV8323 a STM32G4 and a CubeMars RO80 KV105-lite motor. The motor is whining even when I command Iq = 0 Id = 0. Im using SVPWM and alternate reverse sequencing, which essentially means all 3 top side FETs are on 50% of the time and all 3 bottom side FETs are on the other 50%. If anyone has any clue as to why this could be happening I would appreciate it very much. I’m currently also in contact with Texas Instruments support via this post: > **[DRV8323: Audible noise from motor with zero torque. - Motor drivers forum -...](https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/1492128/drv8323-audible-noise-from-motor-with-zero-torque)** > > Part Number: DRV8323 Other Parts Discussed in Thread: CSD88599Q5DC , Tool/software: Hello TI team, > I have designed a custom PCB using the DRV8323SRTAR and CSD88599Q5DC The posts contains much more information about the measurements i have already performed. If this post is not appropriate for the SimpleFOC forum I will happily remove it, but I am at my wits’ end trying to solve this issue.