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Which of the following motor has the poorest speed regulation?

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in DC Machines by (506k points)
Which of the following motor has the poorest speed regulation?

(a) Shunt motor

(b) Series motor

(c) Differential compound motor

(d) Cumulative compound motor

I had been asked this question during an interview for a job.

My question is taken from Operating Characteristics of DC Series Motor in division Characteristics of DC Motors of DC Machines

1 Answer

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Best answer
Correct choice is (b) Series motor

Easiest explanation: If the load is applied to the any DC motor or machine, the speed of the motor decreases automatically. Thus, in order to maintain the constant speed, the difference between no load and full load speed called as speed regulation should be maintained very less. In series motor this difference is almost equal to infinity.

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