Q1/ Correct and incorrect and correct the error if found. 1- It is not possible to increase the speed of a shunt DC motor above rated using flux field control 2-The main disadvantage of potential divider control method of shunt DC motor, the speed up to zero is not possible. 3-The armature voltage of series DC generator is not affected by field current. 4- To solve the armature reaction Problem in large machines, this can be achieved by increasing the brush width 5-In shunt d-e generator the field winding will be constructed from high number of turns and high cross-sectional area of wire. 6-The inter pole winding is connected in parallel to field winding. 7-The produced sparks at the brushes of a de machine is due to friction losses. 8-Series DC motors are used for low torque applications. 9-In series DC generator, Increasing the load current will decrease the magnitude of the generated voltage. 10-The compensation windings are place at the pole face and used to mitigate the effect of the armature reaction.
Q1/ Correct and incorrect and correct the error if found. 1- It is not possible to increase the speed of a shunt DC motor above rated using flux field control 2-The main disadvantage of potential divider control method of shunt DC motor, the speed up to zero is not possible. 3-The armature voltage of series DC generator is not affected by field current. 4- To solve the armature reaction Problem in large machines, this can be achieved by increasing the brush width 5-In shunt d-e generator the field winding will be constructed from high number of turns and high cross-sectional area of wire. 6-The inter pole winding is connected in parallel to field winding. 7-The produced sparks at the brushes of a de machine is due to friction losses. 8-Series DC motors are used for low torque applications. 9-In series DC generator, Increasing the load current will decrease the magnitude of the generated voltage. 10-The compensation windings are place at the pole face and used to mitigate the effect of the armature reaction.
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:Q1/ Correct and incorrect and correct the error if found.
1- It is not possible to increase the speed of a shunt DC motor above rated using flux field control
2-The main disadvantage of potential divider control method of shunt DC motor, the speed up to zero is not possible.
3-The armature voltage of series DC generator is not affected by field current.
4- To solve the armature reaction Problem in large machines, this can be achieved by increasing the brush width
5-In shunt d-e generator the field winding will be constructed from high number of turns and high cross-sectional
area of wire.
6-The inter pole winding is connected in parallel to field winding.
7-The produced sparks at the brushes of a de machine is due to friction losses.
8-Series DC motors are used for low torque applications.
9- In series DC generator, Increasing the load current will decrease the magnitude of the generated voltage.
10-The compensation windings are place at the pole face and used to mitigate the effect of the armature
reaction.
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