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High-voltage and high-power transducer

A high-power, inverter technology, applied in the field of high-voltage and high-power inverters, can solve the problems of high loss and high price, and achieve the effect of low iron consumption, reduced iron consumption, and convenient redundant design

Inactive Publication Date: 2010-09-15
SHANXI ZHAOXIN ELECTRIC POWER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the mainstream technology of high-voltage and high-power inverters in China uses Robinson technology in which power units are connected in series. The shortcoming of this technology is the use of expensive and lossy phase-shifting input transformers.

Method used

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  • High-voltage and high-power transducer

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specific Embodiment approach 1

[0020]A high-voltage and high-power frequency converter includes a rectifier, a filter group, an inverter group, and an output transformer group. The filter bank is connected between the rectifier and the inverter bank. The output transformer group includes M transformers, where M≥2, the primary side of each transformer includes N three-phase windings, and the secondary side includes a three-phase winding, where N≥2. The voltage and power of each three-phase winding on the primary side of the transformer are the same, and the voltage and power of each three-phase winding on the secondary side are the same. The same-phase windings of the M secondary three-phase windings are connected in series in sequence, and then connected to form a star-shaped three-phase winding or a delta three-phase winding. The inverter group includes M×N three-phase inverters, each of which is connected in series in sequence, and the output of each three-phase inverter is connected to a primary-side th...

specific Embodiment approach 2

[0033] A high-voltage and high-power frequency converter includes a rectifier, a filter group, an inverter group, and an output transformer group. The filter bank is connected between the rectifier and the inverter bank. The output transformer group includes M transformers, where M≥2. The primary side of each transformer includes N three-phase windings, and the secondary side includes one three-phase winding, where N≥2. The voltage and power of each three-phase winding on the primary side of the transformer are the same, and the voltage and power of each three-phase winding on the secondary side are the same. The same-phase windings of the M secondary three-phase windings are connected in series in sequence, and then connected to form a star-shaped three-phase winding or a delta three-phase winding. The inverter group includes N three-phase inverters, each of which is connected in series in sequence, and the N three-phase inverters are divided into E teams, where E≥2. The N...

specific Embodiment approach 3

[0046] A high-voltage and high-power frequency converter includes a rectifier, a filter group, an inverter group and an output transformer. The filter bank is connected between the rectifier and the inverter bank. The inverter group includes N three-phase inverters. The primary side of the output transformer includes N three-phase windings, where N≥2, and the secondary side includes one three-phase winding. The three-phase output of each three-phase inverter of the inverter group is respectively connected to one primary three-phase winding of the output transformer. The three-phase windings on the primary side are divided into P groups, where P≥2.

[0047] The primary three-phase windings of different groups are phase-shifted by 60° / P sequentially, and the sinusoidal pulse width modulation fundamental waves output by the three-phase inverter to different groups of primary three-phase windings are not phase-shifted. Or there is no phase shift between different groups of prim...

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Abstract

The invention discloses a high-voltage and high-power transducer which comprises a rectifier, a filter unit, an inverter unit and an output transformer unit. The filter unit is connected between the rectifier and the inverter unit, the output transformer unit comprises M transformers, wherein M is larger than or equal to 2, the primary side of each transformer comprises N three-phase windings, the secondary side comprises a three-phase winding, wherein N is larger than or equal to 2, the primary three-phase windings of each transformer have identical voltage and power, the secondary three-phase windings of each transformer have identical voltage and power, the same-phase windings of the M secondary three-phase windings are sequentially connected in series and then connected into star-type three-phase windings or triangular three-phase windings, the inverter unit comprises M*N three-phase inverters which are sequentially connected in series, the output of each three-phase inverter is connected with a primary three-phase winding, phases sequentially shift at 60 degrees / M among the primary three-phase windings of the M transformers, no phase shift happens among the M secondary three-phase windings, and an SPWM (Sinusoidal Pulse Width Modulation) fundamental wave which is output to the primary three-phase windings of the M transformers by the three-phase inverters has no phase shift.

Description

technical field [0001] This patent application relates to a high-voltage high-power frequency converter. Background technique [0002] At present, the mainstream technology of high-voltage and high-power inverters in China uses Robinson technology in which power units are connected in series. The disadvantage of this technology is the use of expensive and lossy phase-shifting input transformers. Contents of the invention [0003] The technical problem to be solved in this patent application is to propose a high-voltage high-power frequency converter with high reliability in order to overcome the above shortcomings. [0004] This patent application adopts the following technical solutions: [0005] A high-voltage high-power frequency converter includes a rectifier, a filter bank, an inverter bank, and an output transformer bank, the filter bank is connected between the rectifier and the inverter bank, and the output transformer bank includes M transformers, Where M≥2, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458
Inventor 丁振荣
Owner SHANXI ZHAOXIN ELECTRIC POWER EQUIP
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