THYRISTOR CONTROL OF ARMATURE VOLTAGE AND CURRENT As we saw in Chapter 4. an SCR can perform most of the duties of a rheostat incontrolhng the average current to a load. Furthermore, an SCR, or any powerthyristor, does not have the shortcomings of high-power rheostats. SCRs are small,inexpensive, and energy-efficient. It is therefore natural to […]
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