SSR For DC control

[Critt27]

Hello

I want to control a DC motor with an SSR. I had a Crydon D1D20 and it failed close. Need to work at about 20 Hz (On/off about 40 times per second).
Output - 30 VDC @ 5 Amp Max (1 hp dc motor)
Input - 5 - 10 VDC input.

Was thinking about a power-IO relay

 

[itsmoked]

Tough service for the relay.

Make sure you heatsink it well. Make sure you include a diode across it's output. Make sure you get an over rated SSR, 3 or 4x the current.

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[Critt27]

Is there a possible better way to do this?

 

[itsmoked]

I'd probably look for something specifically designed for that task. Normally for motor control the switching rate is FAR higher than a few Hertz.

I'd google and look around a bit for things like:

http://www.electronickits.com/kit/complete/motor/k166.htm

or

http://www.geckodrive.com/product.cfm?pid=13

"DC speed control"
"DC motor control"
Etc.



Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[ScottyUK]

30V @ 5A is 150W. 1 HP is generally accepted to be 746W. Either your motor isn't a 1 HP machine or your numbers are way off.

Adding to Keith's links:

http://www.4qd.co.uk

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