terrible spikes with PWM mode
Posted: Mon Jan 11, 2021 12:44 am
I have taken a new MCP236 and I wanted to check the voltage.
This because last time I found the current quite noisy.
Checking the PWM1 (DUTY 50 on 1000) connected to a Power resistance, I got unexpected voltage impulse every almost 15s with a width of 200ms.
(see LeCroy56.jpg)
When I connect the motor this impulse has an effect on the current (yellow track).
To avoid any doubts, I have measured also the power supply and it is stable at 48V.
LeCroy55.jpg
We get stuck since weeks
This because last time I found the current quite noisy.
Checking the PWM1 (DUTY 50 on 1000) connected to a Power resistance, I got unexpected voltage impulse every almost 15s with a width of 200ms.
(see LeCroy56.jpg)
When I connect the motor this impulse has an effect on the current (yellow track).
To avoid any doubts, I have measured also the power supply and it is stable at 48V.
LeCroy55.jpg
We get stuck since weeks