rg12 said:Hey Guys,
I want to connect my controller to a dummy load (heating element or whatever) but the controller of course has 3 phase wires and not 2 dc positive and negative...
How should I do this?
fechter said:Another approach I've used is to hook up a very small brushless motor so it will run, then add the 3 giant resistors across the phase wires to increase the load.
fechter said:Right. If there is no sensor input, you won't get any output. The little motor gets the controller to fire on all phases.
With many controllers, you could simulate a valid hall signal by just connecting one of the hall signal wires to the 5v and you would get output between a pair of phase wires, but if the signal is static, most controllers will time out after a few seconds thinking the motor was stalled.
Alan B said:Controller will shut down if motor does not spin, as fechter said. Phases should be connected so relationship between phases and halls is correct. Additional power can be consumed by paralleling equal loads to phases.
Alan B said:Power goes with voltage squared (if the resistance does not change). So if you use 80V which is about 1/3 of 220V you'll get 1/9th the power.
You'll have to get more information from the vendor on how it is wired. Or just tell them what you want and let them tell you how to do it.