MTaha Posted May 14, 2017 Report Share Posted May 14, 2017 Hi, I need to soft start a 1KW 48VDC Motor. I am thinking of using solid state relay with the V350 built in PWM function. I believe the use of SSR with DC motors is not recommended. Could anyone advice what hardware may I use? Quote Link to comment Share on other sites More sharing options...
MVP 2021 Joe Tauser Posted May 15, 2017 MVP 2021 Report Share Posted May 15, 2017 You can do this, but you need a DC MOSFET SSR. A regular one won't turn off, as the triacs in it are waiting for the supply to cross zero volts. Which won't happen. http://www.crydom.com/en/products/panel-mount/perfect-fit/dc-output/ Your motor will draw 21 amps, so get a 40 amp unit. You'll need to mount it on a heatsink. Joe T. Quote Link to comment Share on other sites More sharing options...
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