S scubadog New Member Nov 12, 2012 #1 Hello I have built a pwm controller using a PIC. I would now like to build a circuit that will actually drive a 10 amp 12V DC motor. I am hoping to use the microcontroller but do not understand how to drive the high currents. Perhaps some one could give me a pointer as to what direction I should look Thanks
Hello I have built a pwm controller using a PIC. I would now like to build a circuit that will actually drive a 10 amp 12V DC motor. I am hoping to use the microcontroller but do not understand how to drive the high currents. Perhaps some one could give me a pointer as to what direction I should look Thanks
ronv Well-Known Member Most Helpful Member Nov 12, 2012 #2 If you want it to run in both directions you need what is called an H-Bridge. If you only wnat it to go in one direction it is easier. Is 10 amps the running current or the maximum current?
If you want it to run in both directions you need what is called an H-Bridge. If you only wnat it to go in one direction it is easier. Is 10 amps the running current or the maximum current?
K KeepItSimpleStupid Well-Known Member Most Helpful Member Nov 12, 2012 #3 This isn't too bad for a newbie: https://www.electro-tech-online.com/custompdfs/2012/11/h-bridge.pdf Then Google the suggested examples e.g. "xxx Datasheet" In simple terms, there are IC's called an H-bridge which can allow coasting, braking, forward and reverse. The PDF shows four switches. These are usually transistors or MOSFETS. A very simple H-bridge has a direction and a NOT Enable signal. Not ENABLE is driven by PWM for speed.
This isn't too bad for a newbie: https://www.electro-tech-online.com/custompdfs/2012/11/h-bridge.pdf Then Google the suggested examples e.g. "xxx Datasheet" In simple terms, there are IC's called an H-bridge which can allow coasting, braking, forward and reverse. The PDF shows four switches. These are usually transistors or MOSFETS. A very simple H-bridge has a direction and a NOT Enable signal. Not ENABLE is driven by PWM for speed.