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Applie Voltage Control

Speed Control of D.C. Series Motor (Part3)      

3. Applie Voltage Control
       In this method, a series motor is excited by the voltage obtained by a series generator as shown in the Fig. 1.
       The generator is driven by a suitable prime mover. The voltage obtained from the generator is controlled by a field divertor resistance connected across series field winding of the generator.
       As Eα Φ, the flux change is achieved, gives the variable voltage at the output terminals. Due to the change in the suply voltage, the various speeds of the d.c. series motor can be obtained.
       Note that all the advantages and disadvantages of various methods, discussed as applied to shunt motor are equally applicable to speed control of series motor.
Fig. 1  Variable voltage control
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hamada i'm hamada rageh electrical power engineer my talent to write articles about electrical engineering and i depend on google books site to write my articles

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