A bipolar dc machine with interpoles has a main-pole flux of ф per pole and an interpole flux of Фᵢ per pole. The yoke of the machine is devide into four quadrants by the main-pole axis and The commutation axis. The flux-distribution in the quadrants will be

Electrical Machines
A bipolar dc machine with interpoles has a main-pole flux of ф per pole and an interpole flux of Фᵢ per pole. The yoke of the machine is devide into four quadrants by the main-pole axis and The commutation axis. The flux-distribution in the quadrants will be

½ ( ф - фᵢ ) in all the four quadrants

½ ( ф + фᵢ ) in two diametrically opposite quadrants and ½ ( ф - фᵢ ) in the remaining two Quadrants

½ ( ф + фᵢ ) in two adjacent quadrants and ½ ( ф - фᵢ ) in the remaining two quadrants

½ ( ф + фᵢ ) in all the four quadrants

½ ( ф - фᵢ ) in all the four quadrants

½ ( ф + фᵢ ) in two diametrically opposite quadrants and ½ ( ф - фᵢ ) in the remaining two Quadrants

½ ( ф + фᵢ ) in two adjacent quadrants and ½ ( ф - фᵢ ) in the remaining two quadrants

½ ( ф + фᵢ ) in all the four quadrants

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Electrical Machines
Torque angle of a synchorous machine operating from a constant voltage bus is usually defined as the space angle between

Rotor mmf wave and stator mmf wave.

Stator mmf wave and resultant flux density.

Stator mmf wave and resultant mmf wave.

Rotor mmf wave and resultant flux density wave.

Rotor mmf wave and stator mmf wave.

Stator mmf wave and resultant flux density.

Stator mmf wave and resultant mmf wave.

Rotor mmf wave and resultant flux density wave.

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Electrical Machines
The change in speed of a DC generator due to increased load is corrected by

increasing input power of the prime mover.

increasing terminal voltage.

increasing armature cooling.

increasing armature resistance.

increasing input power of the prime mover.

increasing terminal voltage.

increasing armature cooling.

increasing armature resistance.

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Electrical Machines
A DC series motor has which of the following characteristics?

Has a almost constant speed.

Can be started easily without load.

Has its field winding consinting of thick wire and less no of turns.

Has a poor torque.

Has a almost constant speed.

Can be started easily without load.

Has its field winding consinting of thick wire and less no of turns.

Has a poor torque.

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Electrical Machines
To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used.

Ward Leonard control.

rheostatic control.

none of above.

any of above method.

Ward Leonard control.

rheostatic control.

none of above.

any of above method.

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Electrical Machines
The fall in speed of the DC generator due to increase in load can be corrected by

reducing the load voltage.

increasing the input to the prime mover.

cooling the armature.

increasing the excitation.

reducing the load voltage.

increasing the input to the prime mover.

cooling the armature.

increasing the excitation.

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Electrical Machines

Electrical Machines A bipolar dc machine with interpoles has a main-pole flux of ф per pole and an interpole flux of Фᵢ per pole. The yoke of the machine is devide into four quadrants by the main-pole axis and The commutation axis. The flux-distribution in the quadrants will be

Electrical Machines Torque angle of a synchorous machine operating from a constant voltage bus is usually defined as the space angle between

Electrical Machines The change in speed of a DC generator due to increased load is corrected by

Electrical Machines A DC series motor has which of the following characteristics?

Electrical Machines To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used.

Electrical Machines The fall in speed of the DC generator due to increase in load can be corrected by

Electrical Machines
A bipolar dc machine with interpoles has a main-pole flux of ф per pole and an interpole flux of Фᵢ per pole. The yoke of the machine is devide into four quadrants by the main-pole axis and The commutation axis. The flux-distribution in the quadrants will be

Electrical Machines
Torque angle of a synchorous machine operating from a constant voltage bus is usually defined as the space angle between

Electrical Machines
The change in speed of a DC generator due to increased load is corrected by

Electrical Machines
A DC series motor has which of the following characteristics?

Electrical Machines
To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used.

Electrical Machines
The fall in speed of the DC generator due to increase in load can be corrected by