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# The speed of a 110V,3730W DC motor is controllably driven...

<< Back to: Electrical Wiring FAQ (Part 1 of 2)

 Question by Peters Submitted on 7/27/2005 Related FAQ: Electrical Wiring FAQ (Part 1 of 2) Rating: Not yet rated Rate this question: N/A Worst Weak OK Good Great The speed  of a 110V,3730W DC motor  is controllably  driven by a single phase full-wave thyristor bridge rectifier.The ac supply is 120V,60Hz. Assume that a very    large in inductance is in series with the motor  and both the motor  and the rectifiers  are ideal and lossless.The motor back emf is 55v.A>Draw and label clearly the power circuit.B>Determine  the RMS  value of the supply current.C>      Determine the firing angle of the thyristor.D.Determine the supply power factor.E>Sketch clearly  to scale  on a squared  paper,the time variation  of the supply voltage,output voltage and load current.

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<< Back to: Electrical Wiring FAQ (Part 1 of 2)