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The static excitations mainly comprises of _______

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The static excitations mainly comprises of _______

(a) brushless excitation system

(b) thyrister based excitation system

(c) synchronous motor excitation system

(d) brushless and thyristor based excitation system

I have been asked this question in class test.

My enquiry is from Excitation Systems for Synchronous Machines topic in section Synchronous Machines of Electrical Machines

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The correct option is (b) thyrister based excitation system

The explanation: SCRs are used in the rectifier configuration as a static system for excitation for dc field winding.

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