Voltage regulator
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United States of America Patent
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-
Nov 7, 2000
Grant Date -
N/A
app pub date -
Feb 18, 2000
filing date -
Feb 18, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A voltage regulator is presented for regulating at least one of voltage, current or power to an electrical load. The regulator includes a transformer series connected between a power source and electrical load, and a bypass switch connected in parallel with the series connected transformer. The bypass switch is a back-to-back pair of silicon controlled rectifiers (SCRs). A pulse width modulated (PWM) inverter is coupled to the series connected transformer for generating a voltage to be applied to the series connected transformer. A controller is provided for transitioning the regulator from a normal mode through a commutate mode to an active mode, wherein the bypass switch is active in the normal mode and inactive in the active mode. The inverter provides a voltage to the series connected transformer in the active mode, and the controller and the PWM inverter together are configured to actively force the SCR off when the device is in the commutate mode.
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