On-load voltage regulation circuit of interleaved parallel multi-gear transformer with polarity conversion

A voltage regulation circuit and polarity conversion technology, applied in transformers, variable transformers, and conversion equipment that can be converted to DC without intermediate conversion, can solve problems such as complex switch structures and reduce the number of switching times.

Pending Publication Date: 2019-08-30
ZHEJIANG BOTHWELL ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The upper limit of its on-off times determines the service life of the voltage regulating switch designed according to this circuit." This defect remains unchange

Method used

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  • On-load voltage regulation circuit of interleaved parallel multi-gear transformer with polarity conversion
  • On-load voltage regulation circuit of interleaved parallel multi-gear transformer with polarity conversion

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Embodiment Construction

[0056] The structural characteristics and working principle of the positive and negative voltage regulating circuit of the present invention will be further described below in conjunction with the accompanying drawings.

[0057] see figure 1 Shown is a schematic diagram of a five-speed transformer voltage regulating circuit under the technical solution of this aspect. The circuit is composed of a main winding, a voltage regulating winding, a rated voltage branch, a transition switching unit, and three voltage regulating branches.

[0058] The transition switching unit includes a first input terminal T1, a second input terminal T2, an output terminal Xb, and a vacuum interrupter D0 connected in series between the first input terminal T1 and the output terminal Xb in parallel with a transition resistor R.

[0059] The first voltage regulating coil L1 and the second voltage regulating coil L2 are connected end to end to form a voltage regulating winding, and a voltage regulating ...

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Abstract

The invention relates to the field of distribution transformers, in particular to an on-load voltage regulation circuit of an interleaved parallel multi-gear transformer with polarity conversion. Theon-load voltage regulation circuit includes a main winding, a polarity conversion switch, a voltage regulation winding, a transition switching unit, a rated voltage branch and several voltage regulation branches. According to the technical scheme, the polarity conversion switch is arranged between the main winding and the voltage regulation winding, and forward and reverse voltage regulation is realized by adjusting the independent contact switch-on end of the polarity conversion switch. One ends of the voltage regulation branches are respectively connected to the two end taps and middle tapsof the voltage regulation winding, and the other ends are interlaced and connected in parallel into two groups which are connected with the two input ends of the transition switching unit respectively. The input end of the rated voltage branch is connected with the output end of the main winding, and the output end of the rated voltage branch is connected with the output end of the voltage regulation circuit. The beneficial effects are as follows: the on-off frequency of the on-off switch is reduced, and the service life of the corresponding voltage regulation switch is increased; and the transition voltage changes with the voltage regulation gear during voltage regulation, and there is no need for gear-skipping voltage regulation.

Description

technical field [0001] The invention relates to the field of distribution and transformation transformers, in particular to a transformer on-load voltage regulation circuit. Background technique [0002] In the patent with the application number 201610121960 and the title: "A Permanent Magnet Vacuum On-Load Voltage Regulator, Transformer and On-Load Voltage Regulation Method", it provides a method of using two vacuum interrupters to form the main circuit and the transition circuit respectively. Structural on-load voltage regulation method. The key points of this technical solution are: during normal operation, the vacuum interrupter of the main circuit is connected, the main circuit is in the connected state, the vacuum interrupter of the transition circuit is disconnected, the transition circuit is in the disconnected state, The pressure winding determines the external voltage supply gear of the circuit. When the gear is switched, the transition circuit vacuum interrupter...

Claims

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Application Information

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IPC IPC(8): H02P13/06H01F29/04H01H9/00
CPCH01F29/04H01H9/0038H02P13/06
Inventor 吴正文姜方军
Owner ZHEJIANG BOTHWELL ELECTRIC
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