On-load adjustable stepless voltage-stabilizing transformer

Abstract

The invention discloses a load-bearing adjustable stepless voltage regulating transformer, which belongs to the electrical engineering technical field and is characterized in that the iron core of the transformer comprises a main iron core shaped as the Chinese character <ri> and a cylindrical rotating iron core; the main iron core comprises three iron core columns A, B, C; a cylindrical hollow cavity is arranged inside the iron core column B, and the rotating iron core can be placed and rotated in the hollow cavity; a rotating shaft bracket is made of non-ferromagnetic material, and the rotating shaft of the rotating iron core is arranged at the center of the rotating shaft bracket; the rotating shaft is connected with a transmission mechanism and then driven by a motor; the rotation of the motor is controlled by the output voltage; a primary side winding and a secondary side winding are wound on the iron core column A; another secondary side winding is wound on the iron core column B or C; and the two secondary side windings are positively connected in series to serve as the output end of the transformer. When the rotating iron core rotates, the rotating iron core can load and continuously change the output voltage and can freely set a plurality of stable output voltage value; the transformer causes no electric arc and harmonic when in work and has no thyristor and other electronic elements, so the transformer achieves good reliability and low failure rate; besides, the transformer has simple structure, low manufacturing cost and low maintenance cost.

Description

technical field [0001] The invention relates to a load-adjustable stepless voltage stabilizing transformer, which belongs to the technical field of electric engineering. Background technique [0002] In the stabilized voltage transformer in the prior art, under the load condition, the output voltage is a set value, which cannot be changed easily. [0003] Transformer on-load voltage regulation technology is widely used in power distribution systems and is also used in step-up transformers in power plants. The basic principle of the traditional on-load tap changer is to draw several taps from the coil on one side of the transformer, and switch from one tap to another through the on-load tap changer without cutting off the load current. Connectors to change the effective number of turns to adjust the voltage. The traditional on-load tap changer adopts mechanical tap changer, which has many problems, such as arc generation, slow action speed, inconvenient maintenance, and hig...

AI Technical Summary

Problems solved by technology

The advantages of this type of on-load voltage regulator are fast speed, no arc, and less harmonic content, but when the thyristor is out of control, it will cause voltage regulation out of control

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