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P Channel Mosfet

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j_car:
The only info I have on the speed controller is CC & CV PWM v1.3 sync 100v 200a brushed PWM speed controller. The diagram is the best I can do to show what I've tried to achieve. Sorry if it's not very good.

Alex Nikitin:
It is not that the diagram is not good (it is OK, clear enough), it is the actual circuit which is wrong. The Hall switch will produce the output voltage between 0V and +12V (if it is a push-pull output) but the source of the MOSFET sits at 24V at least some of the time (as the controller is PWM the output is switched between 0 and +24V rapidly , possibly with some filtering applied). If the source voltage is above a certain level (around +15V) , FET won't close. If the Hall switch has an open collector/drain output, than it is the PWM transients which may screw things up. Could you clarify what Hall switch do you use?

Cheers

Alex

j_car:
How can I get it to work?

Alex Nikitin:

--- Quote from: j_car on October 03, 2018, 01:01:40 pm ---How can I get it to work?

--- End quote ---

Sorry, not enough information to answer this question. And I'm afraid that with a PWM controller there are no easy answers. You need at least a scope to see what actually is happening in the circuit.

Cheers

Alex

j_car:
OK. Thank you very much for your help.

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