Switching Systems and Methods for Use in Uninterruptible Power Supplies

摘要

An uninterruptible power supply for providing an output power signal to a load has a ferroresonant transformer, a resonant capacitor operatively connected to the ferroresonant transformer, and an inverter operatively connected to the ferroresonant transformer. The inverter is configured to generate the output power signal based on at least one inverter control signal such that the output power signal is a quasi square wave having a first change of phase, an upper limit, and a second change of phase. The at least one inverter control signal is pulse-width modulated between the first change of phase and the upper limit, pulse-width modulated between the upper limit and the second change of phase, and held in an ON state when the output power signal is at the upper limit.

主权项

1. An uninterruptible power supply for providing an output power signal to a load comprising:
a ferroresonant transformer; a resonant capacitor operatively connected to the ferroresonant transformer; and an inverter operatively connected to the ferroresonant transformer, wherein: the inverter is configured to generate the output power signal based on at least one inverter control signal such that the output power signal is a quasi square wave having a first change of phase, an upper limit, and a second change of phase; and the at least one inverter control signal is
pulse-width modulated between the first change of phase and the upper limit,pulse-width modulated between the upper limit and the second change of phase,held in an ON state when the output power signal is at the upper limit.