Phase-shifting voltage-regulating method of three-phase dry-type rectifier transformer of short-wave transmitter power supply

Abstract

The invention provides a phase-shifting voltage-regulating method of a three-phase dry-type rectifier transformer of a short-wave transmitter power supply, belonging to the transformer technology. A tail end of a phase-shifting winding is connected with a starting end of a main winding, and the voltages of the phase-shifting winding and the main winding are regulated at the same time; a primary coil is connected through an extended triangle; a lead wiring position is exchanged through a connection tube, such that phase-shifting with plus or minus 15 degrees of the primary coil is realized and voltage regulation of plus or minus 5% and plus or minus 2*2.5% is realized; 24 independent windings are connected and operated in parallel to form a secondary coil, the capacity of each winding is 1 / 24 of the capacity of the primary coil, and the output voltages of the 24 windings are equal; and a main insulation distance is determined in accordance with 48 times higher than the voltage of each secondary coil. The primary winding still has high voltage regulation precision after being subjected to phase-shifting; 24 equal capacities and same voltages desired by a user can be realized on the secondary winding on one same product; effective material consumed is less, loss in operation is low, and the investment can be saved. The method has a simple structure, good manufacturability, low cost and is safe and practical, and the space can be saved.

Description

technical field [0001] The invention belongs to transformer technology, in particular to a phase-shifting and voltage-regulating method for a three-phase dry-type rectifying transformer. Background technique [0002] The short-wave transmitters are used in the transmitting stations under the State Administration of Radio, Film and Television. The shortwave transmitter has 48 switches. In the design, the two rectifier transformers are split into 24 windings, and the two 24 windings are connected in parallel to form 48 windings to provide the same voltage as the 48-level switch of the short-wave transmitter. The leakage inductance of many secondary windings of the two rectifier transformers cannot be equal, which will cause the AC input voltage of the 48 sets of low-voltage rectifiers to be unequal, resulting in an unbalanced output voltage of the 48-level switch. Due to the unbalanced output voltage, it will eventually become a part of the noise of the short-wave transmitte...

AI Technical Summary

Problems solved by technology

The phase-shifting and voltage-regulating method of the existing short-wave transmitter power supply rectifier transformer has more taps for each phase lead, which makes the transformer not simple and reliable, safe and practical

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