Uninterruptible power supply and ferroresonant transformer for use therewith

摘要: A line-interactive single conversion uninterruptible power supply (UPS) utilizing a multiple tapped ferroresonant transformer and square wave PWM inverter is presented. During normal utility line operation, the voltage not modified in any way, except for filtering regulation. Tap control circuitry insures proper tap selection based on input voltage. transitions out of specification second source, such as an inverter, operated to provide output connected loads. The switching angles may be accomplished through look-up table. This table contains converter pulse widths monitored battery No feedback required. Based inherent regulation provided by transformer, course steps.