Problem 104-1    Source:   Example problem 3-1 - page 75 -    KOSOW, Irving L. -    Book: Electric Machines and Transformers - Ed. Globo - 1st edition - 1977.

A generator in the 250 V shunt configuration, 150 kW, has a field resistance equal to 50 Ω and a armature resistance of 0.05 Ω. Determine:

a) the full load current.

b) the field current.

c) the armature current.

d) the voltage generated at full load.

Solution of the Problem 104-1   

Item a

To solve this problem, we will show the electrical diagram of the DC generator in the shunt configuration according to the Figure 104-05 below.

We know that the power supplied by the generator is the product of the terminal voltage, V_g, and the line current, I_L. Therefore, working algebraically we arrive at:

Item b

To find the field current we use the eq. 104-09. Soon

Item c

To find the armature current we use the eq. 104-08. Soon

Item d

To find the armature voltage we use the eq. 104-02. Soon