PWM motor with relay

464

09:14:09

Control DC motor speed with relay.
How can I improve it?

published 7 years ago

sean140103

7 years ago

Don't use a relay. Use a p channel mosfet for the motor switching. Or (preferably) use an N channel mosfet to low side switch the motor. Also use a higher frequency such as 1kHz and a proper PWM. Perhaps a 555 configured for PWM.

aybex

7 years ago

Switching a relay that fast is not a good idea.

sshsslfun

7 years ago

I wouldn't use a relay. As sean said, use a P Channel Mosfet or an N Channel Mosfet. I have used a Sziklai pair in a driver I made for a motor in one of my posts. Also, when using a relay, motor, or a device with a coil, remember to either put a diode or a cap or both to remoce EMF feedback and avoid a voltage spike.

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.