Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

DC motor controller - avr pwm mosfet

Status
Not open for further replies.

chipxsd

Newbie level 6
Joined
Mar 11, 2004
Messages
14
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
Slovenia
Activity points
183
avr mosfet

Greetings everyone.

I'd like to build my own PWM controller board for an electric scooter. The controller will probably be made with an Atmel's AVR. It is required for the controller to drive a 24V DC motor (250W).

What bothers me, i went through a lot of literature (https://www.4qd.co.uk/faq/) to find out, how to drive a DC motor (all the MOSFETs, Diodes and that kind of stuff...), and haven't found a suitable circuit. As far as i know, controller can be damaged by the motor, if there is no circuit protection.

So, i would like to know, how do you drive the 24V dc-motor - the circuit starting from pwm TTL output to the part where the motor is connected? How are the MOSFETs connected, capacitors, diodes...? Are optocouplers useful in this kind of situation. Any additional circuits, that could improve the controller?

I would really appreciate some help.

Added after 38 minutes:

This is something interesting i found out: **broken link removed** - you can find the schematics in the download section.

It looks like it's an H-bridge, so the motor goes both ways (back and forth). How do i modify the circuit (loose the half of the bridge), for the motor to go only in one direction? Is the circuit good enough for an electric scooter?
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top