DEVICE FOR UNINTERRUPTED ALTERNATING CURRENT POWER SUPPLY USING INTERMEDIATE HIGH-FREQUENCY CONVERSION Russian patent published in 1997 - IPC

FIELD: electric engineering, power supply of radio electronic devices and computers. SUBSTANCE: device has charge rectifier, which output is connected to redundant power supply and high- frequency inverter which control input receives modulation voltage from control unit through commutator which provides supply of modulation voltage to either one or another diagonal of bridge of high-frequency inverter during one half-period of output voltage. Said modulation voltage may be shaped as pulse sequence. High- frequency inverter outputs amplified bipolar pulse sequence which is rectified by high-frequency rectifier and converted to single polarity pulse voltage by means of smoothing filter. Said pulse voltage is sent to input of low-frequency inverter which is controlled by control unit in order to get sine-shaped voltage of 220 V and 50 Hz at output of low-frequency inverter. EFFECT: increased dynamic range of stabilization, decreased weight and size. 3 cl, 2 dwg