Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Chapter 44, Problem 2SQ
To determine
Explain the reason to connect a resistor in series with an armature only than with the entire shunt motor.
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Electric Motor Control
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- Why small voltage is built up immediately in rotating shunt machine even without field excitation ?arrow_forwardi need the answer quicklyarrow_forwardThe armature and field circuits of a 230-volt shunt motor have resistance of 0.31 and 115 ohms respectively. It takes 52 A when operating at a certain load. What is the counter emf?arrow_forward
- Explain how dc shunt motor is working with relevant circuit diagramarrow_forward2- A simple wave wound de shunt motor has the following data: Armature resistance =0.1 ohm Shunt field resistance = 100 ohm Number of poles = 2 Number of conductors = 400 Mechanical and core loss at full load = 2000 W. When the motor is connected to a 400 Volt supply and is fully loaded it draws 104 A. Calculate at a speed of 3000 rpm: i) Armature current and E.M.F ii) Flux per pole iii) Copper losses within the machine. iv) Developed torque, shaft torque and efficiency. v) Sketch the power flow diagram at full load. vi) Motor speed if an external resistance of 0.4 ohms is added to the armature circuit while the load torque remains constant.arrow_forwardsolve Iv,v,viarrow_forward
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