초록 ▼

A flywheel uninterruptible power source has a charging system that uses a high frequency pulse width modulated inverter inside the motor drive with a very low frequency, line commutated converter that regulates by switching the alternating current from the utility power at frequencies under 200 Hz a

A flywheel uninterruptible power source has a charging system that uses a high frequency pulse width modulated inverter inside the motor drive with a very low frequency, line commutated converter that regulates by switching the alternating current from the utility power at frequencies under 200 Hz and 60 Hz. The placement of the motor power regulation switching is moved from the motor drive preferably to the input AC line current that provides power to charge the flywheel system. The switching is preferably done using natural commutation so that the devices are turned off when the current passes through zero for very low loss and device stresses. Preferable devices for switching include thyristors or triacs. The turn on switching can be accomplished using phase angle firing or in one embodiment zero cross over switching is employed to reduce harmonic distortion and radio frequency interference to the primary source.

대표청구항 ▼

1. A flywheel uninterruptible power source comprised of an energy storage flywheel supported for rotation on a bearing system and accelerated and decelerated using a brushless motor/generator for storing and retrieving energy,said flywheel uninterruptible power source prevents interruption of power

1. A flywheel uninterruptible power source comprised of an energy storage flywheel supported for rotation on a bearing system and accelerated and decelerated using a brushless motor/generator for storing and retrieving energy,said flywheel uninterruptible power source prevents interruption of power to an electrical load during an interruption of primary power by supplying power generated from the flywheel generator, said flywheel is accelerated to normal operating speed using power from an alternating current primary source, said power from said primary source is rectified to direct current power which is supplied to an synchronous inverter that accelerates the motor, said direct current power supplied to the inverter is regulated by using switching regulation of the alternating current from the primary source for controlling the acceleration of the flywheel.