Question

The generator is called flat compounded if _____________

(a) The series field ampere turns are such as to produce the same voltage at rated load as at no load

(b) The series field turns are such as that the no load voltage is smaller than the rated load voltage

(c) The rated voltage is less than the no load voltage

(d) Cannot be determined

The question was asked in final exam.

The query is from Methods of Excitation in division Commutation Process & Excitation Methods of DC Machines

Answer 1

The correct choice is (a) The series field ampere turns are such as to produce the same voltage at rated load as at no load

To explain I would say: According to the operating characteristics of a DC compound generator, if series field mmf produces same voltage at rated load as that of no load then it is called as flat compounded generator.