Titlebook: An Introduction to Thyristors and Their Applications; M. Ramamoorty Textbook 1977Latest edition Affiliated East-West Press Private Limited

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Parallel-Series Inverters,applied after allowing a certain time for the excess carriers in the outer and inner layers of the SCR to decay. The decay and recombination of these excess carriers may be accelerated by applying a reverse voltage across the SCR.

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Choppers,ed voltage is removed for a duration known as . (.). The load power can be controlled by varying the on- and off-time. The ratio . to (. + .) is known as the .. This method can be applied to both AC and DC circuits. In AC circuits with direct on-off control, the load current is alternating, and therefore a triac can be very conveniently used.

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Multiple Connections of SCRs, the required voltage and current ratings are lower than these maximum limits. Therefore, even though it may be possible to obtain a single SCR of proper voltage and current ratings, on many occasions the designer is forced to use lower-rated SCRs for reasons of economy and availability. In such a s

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