Abstract
One of the simplest single-phase ac phase-control circuits is shown in Fig. 9–1. The voltage impressed on the load is controlled by changing the phase-control angle α. Usually a symmetrical output is required so that each SCR is gated at the same α. Of course, a given SCR is gated only on alternate half-cycles. It is possible theoretically to use a single triac in place of the inverse-parallel pair of SCRs. However, the dv/dt capability and other rating limitations of presently available triacs often make necessary the use of SCRs. In this chapter, the inverse-parallel pair of SCRs will always be considered since this arrangement is functionally equivalent to the triac and is more generally applicable.
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References
Dewan, S.B. and Straughen, A. Power Semiconductor Circuits. New York: Wiley, 1975, Chapter Four.
Wood, Peter. Switching Power Converters. New York: Van Nostrand Reinhold, 1981, pp. 200–230.
Csaki, F. et al. Power Electronics Problems Manual. Budapest: Akademiai Kiado, 1979, pp. 176–209.
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© 1986 Van Nostrand Reinhold Company Inc.
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Hoft, R.G. (1986). ac Phase Control. In: Semiconductor Power Electronics. Van Nostrand Reinhold Electrical/Computer Science and Engineering Series. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-7015-4_9
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DOI: https://doi.org/10.1007/978-94-011-7015-4_9
Publisher Name: Springer, Dordrecht
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