Noisy PWM Signal from Tyto Flight Stand 15

Support
1

Hi,

I am trying to set up my Tyto Flight Stand 15 in order to test Motors and ESCs. While using the Tyto PWM Output for the Myxa A2Z, the Motor just stuttered and did not move at all. The ESC and the Motor pair seemed to work fine using an external servo controller. So I connected my oscilloscope to the PWM output of the Tyto and got a lot of artefacts along with the PWM signal. I cannot exactly pin point the source of the noise. The noise seems to be a ~325Hz sine waveform and has a fixed time interval between two waves. Could it be a grounding or coupling issue?

Setup:

Motor: T-Motor U8II KV150
ESC: MYXA-A2Z
Tyto Flight Stand 15 - Standard setup with just current and RPM sensor
Power Supply: Korad @48V

Please let me know if any other information is required. Thanks:)

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2

Probe the signal on either side with the cable disconnected to see where the source of the noise is. Try disabling the pull resistor on the analog input if you;re on Telega v1. Try galvanic isolation.

1 Like
3

Thank you for the reply.

It seems to be a grounding issue. I will be implementing a galvanic isolator.