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The field winding should be designed for a voltage from 15-20% less than the exciter voltage.

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The field winding should be designed for a voltage from 15-20% less than the exciter voltage.

(a) true

(b) false

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This intriguing question originated from Design of Field Winding in chapter Design of Synchronous Machines of Design of Electrical Machines

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Right choice is (a) true

Explanation: The field winding should be designed for a voltage from 15-20% less than the exciter voltage. This is because to allow for the drop in voltage between field and exciter and to allow for variations in the reluctance of the magnetic field.

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