THREE-PHASE NETWORK RECTIFIED VOLTAGE KEY NORMALIZER Russian patent published in 2024 - IPC H02M7/25 

FIELD: electronics; radio engineering.

SUBSTANCE: invention relates to electronics and radio engineering and is intended for use in primary links of power supply of energy-intensive equipment from a three-phase network of an object. Rectified voltage key normalizer comprises three-phase rectifier (13), input capacitive filter (1) with a charge resistor shunted by the controlled key element, switching on circuit (14) of the key element, two-channel driver (2) with optoelectronic isolation, key power amplifier (KPA) (3), made according to half-bridge circuit, input filter, including throttle (4) and capacitance (6), throttle current sensor (5), input and output voltage sensors (7 and 12), controlled level retainer (11), threshold subtractor (8), weight adder (9) and relay element (10). Controlled level retainer (11) includes an integrating circuit with a considerable charge time constant and a short discharge time, which selects the minimum level of the minimum voltage of the control voltage from the output of sensor (12), which is proportional to the voltage at the output of the rectifier. Threshold subtractor (8) generates a differential voltage feedback signal, relay element (10) generates an asynchronous pulse-width modulation (APWM) signal for controlling KPA (3) based on the result of comparing the differential voltage feedback signal with the current feedback signal from current sensor (5) of throttle (4).

EFFECT: improved form factor of phase current consumption at increase of energy efficiency of key normalizer of rectified voltage of three-phase network.

1 cl, 6 dwg