ee 3&5 hp DC motor specs
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  1. #1
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    Are the motor specs for the main drive
    3&5 hp DC motors avaiable?
    (torq curves, rpm v/s volts, etc)

    After reading many posts, it seems one option is to keep the main DC motor & gearbox
    and design a complete new drive.
    Ideal: 220/240V 1phase in with proper dc to rotor & field. But 1st must be very clear on motor specs before designing circuits.

  2. #2
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    I previously posted the nameplate data for my (spare) GE 5 HP motor. My '56 WiaD machine presently has a Reliance 3 HP motor installed. (It's "sibling" was the donor of the 5 HP motor).

    Design the drive for 5 HP and it will be good for 3 HP.

    More than likely, you will not be able to get the required 230/115 volts from a 240 volt single-phase source.

    Commercial VVDs, both "open frame" and full-function, cannot do better than 180/90 volts on 240 volts single-phase. Some can do 230/115 volts on 240 volts three-phase and one or two can do 230/115 volts on 480 volts single-phase (after programming them to ignore the missing phase).

    However, if you designed your drive for a 264 or 288 volt single-phase source, and used an autotransformer or autotransformers to obtain that source voltage, you would undoubtedly be able to obtain full armature and (shunt) field voltages from a 240 volt single-phase source.

    0.5 KVA autotransformer(s) should do the job nicely.

    You could use full-wave rectification for the armature and half-wave rectification for the (shunt) field, with a 120/240 volt source, boosted as described, using autotransformer(s).

    The 10EE "Modular" drive used full-wave and half-wave for the armature and (shunt) field, respectively; the earlier WiaD drive used full-wave in both cases.

  3. #3
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    I plan to include an autotransformer, but I am looking for specs like those shown at:

    http://www.reliance.com/pdf/pdf/dcprform/G2175A.pdf

    to match motor requirements.




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