Baldor DC Motor info
Baldor DC Motor info
(OP)
Looking for information about this DC motor.
I have nothing so anything helps.
Wiring Diagram?
Please explain the terms in (parenthesis)
Baldor spec 31-987-842
Frame 66CZ5830DD
HP 2 (SER.F. 1.00)
Volts 28 Amps 62
RPM 2600 (Wound CP) (Class FX)
Cont.Duty (ENCL TENV)
Thanks, Cavitate
I have nothing so anything helps.
Wiring Diagram?
Please explain the terms in (parenthesis)
Baldor spec 31-987-842
Frame 66CZ5830DD
HP 2 (SER.F. 1.00)
Volts 28 Amps 62
RPM 2600 (Wound CP) (Class FX)
Cont.Duty (ENCL TENV)
Thanks, Cavitate





RE: Baldor DC Motor info
Frame 66CZ5830DD
## Describes size, mounting holes, shaft type
HP 2 (SER.F. 1.00)
## Means the motor is not expected to be overloaded much or it would be something like "SF 1.15"
Volts 28 Amps 62
## Obvious
RPM 2600 (Wound CP)
## Don't recall
(Class FX)
## The type of wire used and the temperature it can be run up to.
Cont.Duty (ENCL TENV)
## Totally Enclosed No Ventilation.
## This means there are no openings anywhere on the motor and no external fan.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Baldor DC Motor info
Looking at the motor from the shaft end, if A1, F1, and S1 are all positive, the shaft will turn in the clockwise direction. For counterclockwise direction, reverse ONLY the A1 and A2 leads so A2, F1, and S1 are all positive.
Normally, the S and A leads are wired in series to form the high current armature circuit and the F leads are powered separate from a low current field supply. It is a puzzle why the nameplate does not list the field voltage or field current.
Maybe someone else can fill in that missing detail.
RE: Baldor DC Motor info
Browse the Baldor motor site. Look for the Cowern papers. An excellent collection of easy to read and understand papers on motors. I am always impressed by Mr. Cowern's ability to give accurate explanations in plain language.
http://www.baldor.com/pdf/manuals/PR2525.pdf
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Baldor DC Motor info
I opened up the wiring box, it has three wires.
Two heavy wires labeled A2 and F2, one smaller wire labeled F1. Not labeled they way I thought they might be, I suspect
F2 is A2 are internally connected.
What do you think?
Cavitate
RE: Baldor DC Motor info
The lower of the two readings will be from the field to the common point of the armature and other end of the field. You probably won't get a good reading through the carbon brushes for the armature resistance because the meter does not develop enough voltage, but the difference should be apparent.
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If we learn from our mistakes I'm getting a great education!
RE: Baldor DC Motor info
As I said previously, I have three wires out of the wiring box. Two heavy wires labeled A2 and F2, one smaller wire labeled F1. They are not labeled they way I thought they might be, I suspect F2 is A2 are internally connected.
I measured resistance between wires.
A2 to F2 = 0.5 ohms
A2 to F1 = 41.4 ohms
F1 to F2 = 40.9 ohms.
That seems to agree with my statement above "I suspect F2 and A2 are internally connected."
I also notice there are two wiring diagrams on the wiring cover plate. I have attached a picture of the cover plate.
As noted previously, I only have three wires external to the motor, so I don't know why this cover plate diagram.
Thanks, Cavitate.
RE: Baldor DC Motor info
I notice the motor has four sets of brushes and each set has
two brushes in parallel. The end plate has four screws and it looks like if loosened, the plate the brushes are mounted on can be rotated. I'm sure this changes some phase relationship,
can anyone give me more details.
Thanks, Cavitate
RE: Baldor DC Motor info
You basically have the circuit in the top diagram except A1 and A2 have been transposed to reverse rotation. A1 is internally connected to F2 and only one conductor is brought out. The link shown as a dotted line is an internal connection.
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If we learn from our mistakes I'm getting a great education!
RE: Baldor DC Motor info
Ok, So you say I have a shunt wound motor, and I'm guessing the field lead is brought out for speed control? (maybe not)
The motor is labeled 28v.
If I put 28 v on the field will it run at the stated 2600rpm?
If I reduce the voltage on the field will it run faster?
Do you think the design is a 2600rpm motor with the field in parallel with the armature and at the same voltage as the armature? ( I looked back, that is what waross said)
So, now the next phase; I want to buy a speed controller.
I'll start looking at speed controllers for shunt wound motors.
Thanks, Cavitate
RE: Baldor DC Motor info
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If we learn from our mistakes I'm getting a great education!
RE: Baldor DC Motor info
I'll be looking for a PWM motor speed control. I expect to connect the field to 28v and leave it.
The rest of the story;
This is an effort to get my 14 yr old interested in something other than video games. I want him to learn about building an electric go kart. No! I want him to build an electric go kart and get fooled into learning while he's building it.
Thanks for your help, Cavitate
RE: Baldor DC Motor info
Keith Cress
kcress - http://www.flaminsystems.com
RE: Baldor DC Motor info
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Baldor DC Motor info
I tested my motor today, of course it is rotating the wrong direction.(review; Only three wires external, A2, F1 and F2) I disassembled it hoping I could find the other end of the field and reverse things. No luck, tied up and varnish, couldn't find the other end. I can mount the motor the other direction on the go kart, but it's a pain.
While I had it apart I noted the following things,
It has four coil areas.
Two coils opposite each other have thin wire, I think they are the field coils.
The other two areas look like they each have two coils in them (two different color wires) These have heavier wire. This make me think the series coil and the CPNS (or IP) coil are wound in the same slot.
These details make me think the motor is the 6 lead compound motor as shown in the bottom half of the cover plate photo I posted. Please refer to attachment.
Any additional comments or additions or corrections requested.
Thanks, Cavitate