DC motor connections

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jrk

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I have a 2HP 180V DC motor that I need to hook to a contoller. The motor has 4-leads, 1A, 2A, 1F, and 2F. The controller has 2-leads M1 and M2. I presently have M1 connected to A1, M2 connected to A2 and the fields are tied together. The motor spins up but I have no controll over the speed.
 
jrk said:
I have a 2HP 180V DC motor that I need to hook to a contoller. The motor has 4-leads, 1A, 2A, 1F, and 2F. The controller has 2-leads M1 and M2. I presently have M1 connected to A1, M2 connected to A2 and the fields are tied together. The motor spins up but I have no controll over the speed.
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I am guessing this is a controller designed for a PM motor. You appear to not have this type of motor.

1A and 2A are the armature leads, 1F and 2F are the field leads.
 
DC motor

DC motor

What is a PM motor? Also I noticed I am not getting a feed back or Tach reading from the Tach, this may be my problem even though I would expect the motor not to move with no feed back loop.
 
When you say; you do not have control over the speed. What kind of a controller do you have ? and what is the set up?. Do you constantly change speed as it is needed ? or do you adjust the speed where you want it to be and leave where it is?. I have seen set ups where motor is 180VDC. There was a controller and a pot.attach to it where the speed would be adjusted. Is this a new set up that you are trying to make it work ?.Please, give us a little more information to understand your application. May be we could come up with answers for you. Thanks.
 
DC Speed Control

DC Speed Control

jrk said:
I have a 2HP 180V DC motor that I need to hook to a contoller. The motor has 4-leads, 1A, 2A, 1F, and 2F. The controller has 2-leads M1 and M2. I presently have M1 connected to A1, M2 connected to A2 and the fields are tied together. The motor spins up but I have no controll over the speed.
Click to expand...

I am wondering about the M1,M2 leads from you controller. This does not seem correct. As pointed out the A1 & A2 are the Armature and the F1 & F2 are a shunt field winding. There are several ways to control the motor speed. If it is in steps for example you would probably finds resistors in series with the armature and they would have contactors that would allow you to shunt them out one at a time to adjust the current through the armature and the speed in steps. Problem with this is the resistors give off wasted energy in the form of heat. In the newer realm there are electronic controllers that supply variable voltage to the armature separately from the field. With the electronic you get full speed control. I am wondering if you have the correct controller. More info would be helpful.
 
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