I'm having trouble with a LabVIEW VI running a PWM output (via myDAQ) to run a 24 volt (19 watt) DC fan. Motor stalls at regular intervals (about 80 seconds); duty cycle is above 50% when it happens. Don't think it is VI as it is proven on smaller scale running 5 volt fan direct from myDAQ output. I am stepping up using SSR, could this be the issue? Not using free wheel diode as thought motor too small. Could it be feedback or harmonics somewhere.? I have an Electrical rather than Electronics background, so I could be missing something simple. Anyone with any ideas would be great?
