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- Dec 27, 2014
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I'll see what I can come up with. Interesting, and cheap.
Thanks.
Thanks.
Hi Bob, I've been through this recently and have dealt with the Australian pricing phenomenon of chinese vfds being similar in price as decent quality.
Have a look on ebay then have a look on rs components aust. You can get a new teco 1.5hp motor for under $300 and a abb or parker vfd for similar. Last i checked you are paying over $250 for a chinese vfd. Not worth the trouble imo
Are you on single or three phase?
Hi Bob,
you may have to make some concessions if the motor you are trying to put the PWM controller is a capacitor start and/or capacitor run motor.
the centrifugal start switch will be trying to put the start capacitors' charge into the motor's start windings anytime the motor dips to around 80% of it's rated RPM.
this means that you'll need to wire in a momentary start switch circuit for starting, and disconnect the centrifugal switch.
you should start the motor with the PWM at the high speed end of the speed pot's travel to avoid high current draw.
most motors don't like operating over 12Khz, you may wish to avoid that as well.
i hope the information is useful
That's not going to work with your induction motor. It's intended for resistive loads and for motors such as the series motors in drills and the shaded-pole motors in fans.I have ordered a cheap $3.00 PWM type controller from china on ebay,