Flywheel power source apparatus.

摘要

A flywheel power source apparatus of the invention can be additively used in a power source apparatus for a load such as computer, which is weak to momentary service interruption or large voltage variation and therefore requires the countermeasure. The flywheel power source apparatus comprises main circuit having a converter for converting AC power source output into DC output and a first inverter for converting the DC output of the con­verter into AC output and supplying it to a load, a flywheel device supplied with power from the main circuit and driven for rotation, and a compensation circuit for supplying the stored energy based on the rotational force of the flywheel device to the first inverter of the main circuit. The flywheel power source apparatus is composed of a chopper circuit for controlling voltage of the compensation circuit, a second inverter circuit for controlling frequency of the compensation circuit, and first and second comparators for comparing outputs during outage of the power source and at normal state with reference values respectively and controlling the chopper circuit.