powe question

Discussion in 'Homework Help' started by deno, Jul 13, 2014.

  1. deno

    Thread Starter New Member

    Jul 13, 2014
    1
    0
    find the solution for this:
    A 240V dc shunt motor gives an output power of 25hp and draws an armature current of 80A at full load. Assume that the armature resistance is 0.05Ω and field resistance is 200Ω. Find the rotational losses at full load and motor efficiency.
     
  2. crutschow

    Expert

    Mar 14, 2008
    12,974
    3,220
    We don't do your homework for you. What have you done so far besides post he question here?
     
  3. vk6zgo

    Active Member

    Jul 21, 2012
    677
    85
    Consider this: HP is just another way of expressing power.

    You can convert the output power in HP to Watts.
    You can also calculate the Electrical power input.
    It should then be easy!
     
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