RU94020630A - Frequency changer - Google Patents

Abstract

FIELD: converter engineering; power supply for ozone electrosynthesis plants. SUBSTANCE: frequency changer has three-phase bridge rectifier built around thyristors 1-6 and connected to its input terminal leads, as well as self-contained single-phase bridge converter built around thyristors 7-10 and connected to rectifier through choke coil of filter 11, to series circuit set up of switching choke coil 12 with tap and switching capacitor 13 inserted across diagonally opposite pair of terminals, to diode 14 whose anode is connected to cathode group and cathode, to anode group of inverter bridge, series circuit set up of second choke coil of filter 15 and capacitor 16 connected between positive and negative output terminals of rectifier, thyristor 17 whose anode is connected to common point of connection of second choke coil of filter 15 and capacitor 16 and its cathode is connected to tap of switching choke coil 12, transformer 18, series circuit set up of second diode 19, second thyristor 10, second switching choke coil 21 inserted between anode group of inverter bridge and common point of connection of second choke coil of filter 15 and capacitor 16, second capacitor 22 inserted between common point of connection of second diode 10 and second thyristor 20, and cathode group of inverter bridge 23 whose anode is connected to negative output terminal of rectifier and anode, to its positive output terminal. Switching capacitor 13 is connected to output terminals of frequency changer through thyristor 18. EFFECT: enlarged functional capabilities of frequency changer. 1 dwg

Claims (1)

The invention relates to a conversion technique and can be used as a power source for ozone electrosynthesis plants. The invention extends the scope of the frequency converter. The frequency converter (IF) contains a three-phase bridge rectifier (VP) on thyristors (TI) 1 - 6, connected to the input terminals (YO) of the inverter, and a single-phase bridge autonomous inverter (IN) on TI 7 - 10, connected to the VP through a choke ( DR) filter 11, with a serial circuit (PC) from a switching DR 12 with a tap and a switching capacitor (KN) 13 in the diagonal of an alternating current, with a diode (DI) 14, the anode (AN) of which is connected to the cathode group (KG), and cathode (KA) - with the anode group (AG) of the IN bridge, the PC from the second DR filter 15 and KH 16, included between the positive and the negative output YOU VP, TI 17, the AN of which is connected to the common point (OT) of the connection of the second DR filter 15 and KH 16, and the KA to the tap of the switching DR 12, transformer (TP) 18, the PC from the second DI 19, TI 20 and switching DR 21 connected between the AG of the IN bridge and the OT connection of the second DR filter 15 and KH 16, the second switching KN 22 connected between the OT of the connection of the second DI 19 and the second TI 20 and the KG of the IN bridge, the third CI 23, whose AN is connected to the negative , and KA to a positive output YOU VP. Switching KH 13 is connected to the output of the inverter through TR 18. 1 ill.