November 2016
Intermediate to advanced
1008 pages
27h 59m
English
Content preview from Power Electronics and Motor Drive SystemsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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5.1. Single-Phase Full-Bridge Fully Controlled Thyristor Rectifier
The most well-known single-phase fully controlled rectifier, shown in Fig. 5.1(a), uses four thyristor devices. The dc load source E can be a battery bank or the counter electro motive force (EMF) of a dc motor. The operation of this rectifier can be described as follows: When during the first half-cycle a gating pulse is applied to thyristors Q1 and Q4, which are forward biased, they are turned on connecting the input power supply voltage to the load terminals. The equivalent circuit of the rectifier during this mode is shown in Fig. 5.1(c). During this mode the input voltage, which has positive values, generates a positive input and output current. When during the second half-cycle ...
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