Hi,
I am going to be controlling a switched reluctance motor using a 555 timer in monostable mode which will be triggered by a DSP. I will use a comparator against a reference voltage to ensure the MOSFET that will be driving the motor does not exceed a designed value.
My general flow therefore is:
DSP -> Comparator -> 555 -> Motor
Which will loop back to the comparator to ensure no over current.
My only problem is hooking up the comparator and 555... I believe my MOSFET will need a driver but I havn't a clue. I've seen some images of two transistors - One PNP and one NPN which will ensure that switching on and off is fast but I do not understand them nor do I find one that is consistantly used (Often different numbers of transistors are used).
Could anybody please advise on how I will drive my mosfet (PS. I can not simply use a MOSFET driver IC).
Cheers.
I am going to be controlling a switched reluctance motor using a 555 timer in monostable mode which will be triggered by a DSP. I will use a comparator against a reference voltage to ensure the MOSFET that will be driving the motor does not exceed a designed value.
My general flow therefore is:
DSP -> Comparator -> 555 -> Motor
Which will loop back to the comparator to ensure no over current.
My only problem is hooking up the comparator and 555... I believe my MOSFET will need a driver but I havn't a clue. I've seen some images of two transistors - One PNP and one NPN which will ensure that switching on and off is fast but I do not understand them nor do I find one that is consistantly used (Often different numbers of transistors are used).
Could anybody please advise on how I will drive my mosfet (PS. I can not simply use a MOSFET driver IC).
Cheers.