Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

control circuit for a dc current motor

Status
Not open for further replies.

tsoupl

New Member
a new project at my power electronic lab says:
"make an electronic control circuit for the turns of a motor DC current with working voltage 0-12V DC,maximum power 500W, trigger Voltage 12V and trigger current 3A"
any suggestions?????
 
jh001622 said:
you can use a pwm to control the speed of your motor... if the current is too low, use an h-bridge. :D

Well in the spec of the motor he mentioned 500W - it's going to need a good sized H-bridge :lol:

This sounds like the size of things used in the smaller Robot Wars machines, most of those use 4QD controllers and similar. There's an example circuit at https://www.4qdtec.com/pwm-01.html.
 
PWM is the way to go. At 12 V you need to drive 41A to get the 500W spec. You'd be hard pressed to make a linear amp that can provide that kind of power. A simple N-Channel mosfet as a low side driver should work. You might have to parallel a couple Mosfets to get the current capability to 41V (You might have to do a little reasearch to make this work right). Make sure you use a MOSFET Driver to turn tham on and off quickly. You only need an H-bridge if you need to control the direction of spin- if one direction is enough dont worry about the bridge.

Hope this helps
Brent
 
Status
Not open for further replies.

Latest threads

New Articles From Microcontroller Tips

Back
Top