I have a 12 volt windlass (winch). I would like to be able to select direction of rotation using a switch. Being a D.C. motor I thought I could do this by simply reversing the wires powering it. I was using a battery charger to test my theory, it rotated clockwise fine but when I reversed the leads all I got was a buzz sound. Any suggestion's? Thank's
2007-02-22 15:40:27 · 1 answers · asked by luther 4 in Cars & Transportation ➔ Maintenance & Repairs
Unless other wise specified on the spec. plate a general purpose D-C motor can be reversed by changing the polarity of either the armature or the field but not both. When you changed the supply leads you changed both, thus the buzz sound. I hope this helps.
2007-02-22 16:20:19 · answer #1 · answered by chevycheyenne72 1 · 0⤊ 0⤋
In a straight forward Two wire DC motor your theory is correct.
Just take any blower motor, cooling fan motor,window motor, and what you theorized is correct.
It is quite possible that you have a two speed motor.
In which the case is one polarity and the leads are the two speeds.
If you were to measure from the case to either lead with a DVM and get any resistance reading ( particularly a low one )
it can only mean that the motor is shorted or that you are actually seeing one of the windings.
2007-02-22 16:23:28 · answer #2 · answered by Anonymous · 1⤊ 0⤋