Would this SSR work for PWM control?

D

Deeg

Member

• Nov 4, 2013

• #1

https://www.amazon.com/Amico-SSR-25..._1?ie=UTF8&qid=1383581597&sr=8-1&keywords=ssr

My concern is whether it's fast enough. In general are high amp SSRs slow? Is there anything I need to consider when choosing an SSR for PWM control?

 

ChrisP58

Well-Known Member

Most Helpful Member

• Nov 4, 2013

• #2

That SSR is for AC, so it will have SCRs or a triac as it's power semiconductor. Don't know if has zero cross detection.

If you're planning to do PWM with a DC supply voltage, then no, it won't work for you. You can turn it on, but you can't turn it off.

 

D

Deeg

Member

• Nov 4, 2013

• #3

Thanks Chris! You saved me some frustration--I didn't consider the difference between AC and DC. It's obvious once it's been pointed out.

 

K

KeepItSimpleStupid

Well-Known Member

Most Helpful Member

• Nov 4, 2013

• #4

You didn't list any specs. your shooting for. Here https://www.omega.com/pptst/SSRDC100V.html is an SSR for DC.

 

crutschow

Well-Known Member

Most Helpful Member

• Nov 4, 2013

• #5

Most DC SSRs are slow and do not work well for PWM unless it's low frequency. Depending upon the PWM frequency you use, you need to look for a DC SSR with the appropriate response time (which unfortunately is not always given in the specifications).