Speed Control Motor DC 220VDC ?

[id_ruben]

Hi All,

I am planning a 220v dc motor speed control using a microcontroller (PWM).
But I am less familiar with the insulation between the avr to the motor drivers.
Can I use the opto 4n25?.
And how motor circuits using a mosfet or other.
Thanks for the help.

Regards,

Ruben

 

[goldsmith]

Dear Ruben
Hi
See this picture:

 

[goldsmith]

And about your opto coupler : what is your PWM frequency? opto coupler choosing is depends on your frequency.