June 2016
Intermediate to advanced
424 pages
18h 52m
English
Content preview from Power Electronics Handbook
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Chopper control circuits 267
12.6 Chopper control circuits
The basic control circuit for a chopper consists of a mechanism for turning
on the main switching semiconductor at the start of a cycle and of turning
off the device when the cycle is to be terminated. If this main switch is a
thyristor it can be commutated by firing an auxiliary thyristor. Usually
there are two main applications for choppers, to provide a stabilised power
supply and to control the speed of a d.c. motor by varying the voltage
across it. Both these applications require some form of voltage sensing, in
order to keep the load voltage constant under varying current or suppl ...
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