Hello
I am trying to design a circuit to control a 240v DC motor, and also keep the high voltage separate from the input PWM (in case of magic smoke).
Since I'm fairly new to circuit design, I am unsure of a few things:
Is it ok to have a common ground between the low and high voltage parts?
Should the ground be connected to the mains earth?
If the current draw on the motor exceeds the capability of the fet, can I add more fets in parallel to multiply the maximum current?
Is it safe to assume the high voltage side can be effectively (and safely) tested at a much lower voltage, say 12v?
Perhaps I've done something stupid in my schematic, so any observations and comments are welcome!
Thanks!
I am trying to design a circuit to control a 240v DC motor, and also keep the high voltage separate from the input PWM (in case of magic smoke).
Since I'm fairly new to circuit design, I am unsure of a few things:
Is it ok to have a common ground between the low and high voltage parts?
Should the ground be connected to the mains earth?
If the current draw on the motor exceeds the capability of the fet, can I add more fets in parallel to multiply the maximum current?
Is it safe to assume the high voltage side can be effectively (and safely) tested at a much lower voltage, say 12v?
Perhaps I've done something stupid in my schematic, so any observations and comments are welcome!
Thanks!