Hello everyone in the AAC community. I recently built this motor controller based on TI's TL494 and IR2110 mosfet driver. Although it works great i have a question. I have the ir2110 configured as a dual low side driver and both motors work, if i where to place both motor on the same shaft to spin it will the output power of the motors add up, or will the output power alternate between the two motors?

 

Welcome to AAC!
What is providing the IR2110 Lin and Hin signals?

 

Welcome to AAC!
What is providing the IR2110 Lin and Hin signals?

Tl494 is supplying the signals

 

Yes you can put two motors on the same shaft, you will get no sync problems and better power transfer, but if one motor is under powered it will act as a brake or extra friction.

 

I am not certain how you will connect everything.
The 494 has two outputs. Each is limited to 45 to 49% on time. By paralleling the two MOSFETs you can get to 90 to 98% on time max. It looks like you will have one output per motor. That will limit you to about 1/2 voltage on the motors.

I think you will have no problem with two identical motors on the same shaft. Even if one wants to run slightly faster, it will pull slightly more current but will be fine.

 

Thanks ever1 thats kind what i figured just need more insight since im not an engineer.

 

Thanks ever1 thats kind what i figured just need more insight since im not an engineer.

The TL494 has two Complimentary outputs, one of which you can connect to the IR2110 inputs, the other input is for direction..