I need a bit of help with a project I'm working on. I've been looking for a good simple high amp pwm motor driver circuit and found this
It is suppose to handle 24v 60a. I want to use it for a kids ride on Power Wheels toy from what I've read is that the motors should not draw more then 30a. I made some small changes to the circuit like removing 1 mosfet because I know I would never reach 60a the other thing is I',m using a PIC micro PWM to control the motor because I use a hall sensor for the throttle and also added a 1k between the pic i/o and base of the totem pole circuit.
I hope I can explain this problem, because its for a childs ride on I wanted to be able to run 12 and 24v I have 2 positive wires into the circuit. The first is for the 12v replays that control forward and reverse and also the digital circuit that is dropped to 5v using a lm7805. The second is just for the motors positive side so if I want to run 12v connect both to 1 12v battery if I want 24 I leave the first 12v wire on the first battery and then add a second 12v battery and connect the motor positive to the second battery in series. 12v mode works good its the 24v that kills the mosfets. I cannot figure out why. Also I have a 50v cap on the 12v only side that blew as well. Is there some how running 2 different voltages that 24v is getting to the 12v or 5v somehow?
please help I hope I didn't make your head explode
It is suppose to handle 24v 60a. I want to use it for a kids ride on Power Wheels toy from what I've read is that the motors should not draw more then 30a. I made some small changes to the circuit like removing 1 mosfet because I know I would never reach 60a the other thing is I',m using a PIC micro PWM to control the motor because I use a hall sensor for the throttle and also added a 1k between the pic i/o and base of the totem pole circuit.
I hope I can explain this problem, because its for a childs ride on I wanted to be able to run 12 and 24v I have 2 positive wires into the circuit. The first is for the 12v replays that control forward and reverse and also the digital circuit that is dropped to 5v using a lm7805. The second is just for the motors positive side so if I want to run 12v connect both to 1 12v battery if I want 24 I leave the first 12v wire on the first battery and then add a second 12v battery and connect the motor positive to the second battery in series. 12v mode works good its the 24v that kills the mosfets. I cannot figure out why. Also I have a 50v cap on the 12v only side that blew as well. Is there some how running 2 different voltages that 24v is getting to the 12v or 5v somehow?
please help I hope I didn't make your head explode