A 4-pole lap-connected armature of a de Shunt generator is required to supply output loads connected as follows: (1) 2.5 kW Geyser connected in series with a 2.5 kw dc motor. (2) 5 kW Lighting load connected in parallel with the above load. If the load voltage is 250v and the Generator have an armature resistance of 0.2 ohm and a field resistance of 250 ohms. The armature has 120 conductors in the slots and runs at 1000 rpm. Allowing 1 V per brush for contact drops and neglecting friction loss, find? 1- Total flux offered by shunt excitation? 2- If the number of poles are doubled what will be the new total flux?

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A 4-pole lap-connected armature of a dc Shunt generator is required to supply output loads connected as follows:

(1) 2.5 kW Geyser connected in series with a 2.5 kW dc motor.

(2) 5 kW Lighting load connected in parallel with the above load.

If the load voltage is 250v and the Generator have an armature resistance of 0.2 ohm and a field resistance of 250 ohms. The armature has 120 conductors in the slots and runs at 1000 rpm. Allowing 1 V per brush for contact drops and neglecting friction loss, find?

1- Total flux offered by shunt excitation?

2-If the number poles are doubled what will be the new total flux?

A 4-pole lap-connected armature of a de Shunt generator is required to
supply output loads connected as follows:
(1) 2.5 kW Geyser connected in series with a 2.5 kw dc motor.
(2) 5 kW Lighting load connected in parallel with the above load.
If the load voltage is 25sov and the Generator have an armature resistance of 0.2
ohm and a field resistance of 250 ohms. The armature has 120 conductors in the
slots and runs at 1000 rpm. Allowing 1 V per brush for contact drops and neglecting
friction loss, find?
1- Total flux offered by shunt excitation? .
2- If the number of poles are doubled what will be the new total flux?
Transcribed Image Text:A 4-pole lap-connected armature of a de Shunt generator is required to supply output loads connected as follows: (1) 2.5 kW Geyser connected in series with a 2.5 kw dc motor. (2) 5 kW Lighting load connected in parallel with the above load. If the load voltage is 25sov and the Generator have an armature resistance of 0.2 ohm and a field resistance of 250 ohms. The armature has 120 conductors in the slots and runs at 1000 rpm. Allowing 1 V per brush for contact drops and neglecting friction loss, find? 1- Total flux offered by shunt excitation? . 2- If the number of poles are doubled what will be the new total flux?
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