Need help with chinese controller. Alternator build.

[rob-boss]

Im trying to turn an alternator into a motor. the alternator with its other electronics removed needs the rotor to be electrified and the stator needs the 3 phase cables installed in the right order. no phase combination worked. nothing ever specified where to wire the motors power supply vs its phase lines so i just connected the motor off of the battery cables right before they enter the controller.

I wired the throttle how the diagram said to except for the yellow wire which i don't know what to do with. the throttle display comes on but it displays a dead battery even though the battery is fully charged. the throttle does not make the motor spin in any phase line combination.

The motor positive and negative comes from the battery cables right before they connect to the controller and the phase lines come from the controller.

there are 2 brake sensor lines. i combined both positives and negatives and tested each phase line combo with the lines connected and disconnected to no avail.

the controller page said its supposed to work with the hall lines unplugged. the battery im using is 24v 20Ah with 20A discharge rate. can anyone help me figure out how to wire the power correctly to the motor and controller?

 

[amberwolf]

Im trying to turn an alternator into a motor. the alternator with its other electronics removed needs the rotor to be electrified and the stator needs the 3 phase cables installed in the right order. no phase combination worked. nothing ever specified where to wire the motors power supply vs its phase lines so i just connected the motor off of the battery cables right before they enter the controller.

Well, this controller is not designed to run an alternator, so it would not have any instructions on how to do that.

The motor doesn't get a "power supply" but it will probably need a field current to provide something for the system to react to. Some poeple add permanent magnets instead of dealing with this.

This field current may have to be at a lower voltage than your battery voltage.


I haven't done one of these up, though I was going to at one time before I got some easier to use powerchair motors. My research on it before trying found that there are a lot of different "altermotor" and "alternator as a motor" threads here on ES and elsewhere around the web that would probably have useful info, depending on your specific alternator design. Some of them are made in ways that require physical modification before they can be used as a motor.

Some have installed hall sensors and some have used them sensorlessly. Depends on how your controller works which is required and which works best for your specific usage scenario.

I wired the throttle how the diagram said to except for the yellow wire which i don't know what to do with. the throttle display comes on but it displays a dead battery even though the battery is fully charged. the throttle does not make the motor spin in any phase line combination.

BTW, if your controller has a PAS input, some of them require this to be turning at some minimum rate for the throttle to work.

Also, if you have a display (or the cntroller has an option for one) it may be required to ahve the display to turn the assist level up from zero to whatever minimum level is required to allow throttle to operate.