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Old 08-09-2011, 03:01 PM   #1 (permalink)
A madman
 
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Reversing an AC Motor

Hello EV gents! I'm about to get the EV grin. But first, I was wondering how to reverse an AC Motor? Specifically mine, a Curtis AC-12. The wiring diagram (located here: http://www.electricautosports.com/fi...-2009%29_0.pdf ) says to simply switch the white wire with the yellow wire in pin 33.

But the connector has no yellow wire. And nothing is in pin 33. Is there another way to reverse the motor? Could I possibly reverse the leads going to the motor itself? (W,V,U in the diagram)

Any help would be greatly appreciated!


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Old 08-09-2011, 05:50 PM   #2 (permalink)
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So your controller has a 35 pin plug on the side of it and plugging in to that plug is a wiring harness, correct? and it's on that wiring harness that you are missing the one wire?
If that is the case then it sounds like you need a new wiring harness/pigtail.

As I understand it the hail effect sensor is assuming that the winding's are hooked up correctly and it is the hail affect sensor that is telling the controller where in the rotation the motor is and the controller it's self is making it rotate a given direction, that is why it only takes one wire to tell the controller to change directions.
so to get it to turn the other way you need a new wiring harness pig tail.
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Old 08-09-2011, 06:36 PM   #3 (permalink)
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Yup on everything. Finally heard back from the MFG. They're sending me a new pin to add to my existing one.

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