09-04-2017, 04:18 PM
Yeah, I certainly would be interested in your results. I had no idea the belt driven fans were quieter than direct mount squirrel cage.
Electronics are moving so fast these days at which I wouldn't be surprised if someone is using thermistor driven fans. Variable frequency drives are very cheap nowadays which would work with a totally enclosed fan cooled motor as used on belt drive fans. The VFD will accept a 4-20 mil or a 0-10V signal that would typically be fed from a thermocouple. That method has been in play for years.
Galco electronics has low priced single phase VFD's. Dwyer has thermocouples and interfaces to get you to the input level of the VFD, https://www.dwyer-inst.com/Product/Temperature/Sensors/ & https://www.dwyer-inst.com/Product/Tempe.../Series651
Hope this helps...........
Electronics are moving so fast these days at which I wouldn't be surprised if someone is using thermistor driven fans. Variable frequency drives are very cheap nowadays which would work with a totally enclosed fan cooled motor as used on belt drive fans. The VFD will accept a 4-20 mil or a 0-10V signal that would typically be fed from a thermocouple. That method has been in play for years.
Galco electronics has low priced single phase VFD's. Dwyer has thermocouples and interfaces to get you to the input level of the VFD, https://www.dwyer-inst.com/Product/Temperature/Sensors/ & https://www.dwyer-inst.com/Product/Tempe.../Series651
Hope this helps...........
Gordon Jones
2000-45'-2slide-#567