Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 21 Jan 2018 My Price 8.00

value of Rfc required

The dc generator in Problem 4.3 rotates at 1500 rpm, and it delivers rated current at rated terminal voltage. The field winding is connected to a 120 V supply.

(a) Determine the value of the field current.

(b) Determine the value of Rfc required.

Problem 4.3

A dc machine (6 kW, 120 V, 1200 rpm) has the following magnetization characteristics at 1200 rpm.

The machine parameters are Ra = 0:2 Ω, Rfw = 100 Ω. The machine is driven at 1200 rpm and is separately excited. The field current is adjusted at It = 0:8 A. A load resistance RL = 2 Ω is connected to the armature terminals. Neglect armature reaction effect.

(a) Determine the quantity KaΦ for the machine.

(b) Determine Ea and Ia.

(c) Determine torque T and load power PL.

 

Answers

Maurice Tutor
(5)
Status NEW Posted 21 Jan 2018 12:01 AM My Price 8.00

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