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High-voltage frequency converter with centralized charged power units

A high-voltage inverter, power unit technology, applied in the output power conversion device, AC power input into AC power output, electrical components and other directions, can solve the problems of increasing cost, increasing process complexity, etc., to extend service life, The effect of reducing product cost and reducing space volume

Inactive Publication Date: 2015-07-29
GUANGDONG MINGYANG LONGYUAN POWER ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the disadvantage that each unit needs to install a power resistor and a contactor control circuit, which not only increases the cost but also increases the complexity of the process.

Method used

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  • High-voltage frequency converter with centralized charged power units

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Embodiment Construction

[0015] Such as figure 1 Shown is a high-voltage frequency converter for centralized charging of a power unit of the present invention, including a power unit 1, a phase-shifting transformer 2, a high-voltage power supply 4, a low-voltage power supply 5, and a centralized charging circuit 6. The primary winding of the phase-shifting transformer 2 is connected to the A circuit breaker QF11 is connected in series between the high-voltage power sources 4, and the secondary winding of the phase-shifting transformer 2 is connected to the power unit 1. The secondary winding of the phase-shifting transformer 2 is also provided with an auxiliary winding 3, which is connected to the centralized charging circuit 6, The low-voltage power supplies 5 are connected in series in sequence.

[0016] The inventive idea is: the low-voltage power supply 5 supplies power to the auxiliary winding 3 of the phase-shifting transformer 2 through the centralized charging circuit 6, generates an induced v...

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Abstract

The invention discloses a high-voltage frequency converter with centralized charged power units. The high-voltage frequency converter comprises the power units, a phase-shifting transformer, a high voltage power supply, a low-voltage power supply and a centralized charging circuit, wherein a circuit breaker QF11 is arranged between a primary winding of the phase-shifting transformer and the high voltage power supply in a series connection mode, a secondary line winding of the phase-shifting transformer is connected with the power units, an auxiliary winding is arranged on a secondary side of the phase-shifting transformer, and the auxiliary winding is in series connection with the centralized charging circuit and the low-voltage power supply in sequence. Compared with existing high-voltage frequency converters in the market, the high-voltage frequency converter with the centralized charged power units has the advantages that the number of used charging elements is small, product costs can be greatly reduced, space size of a whole machine can be effectively reduced, maintaining is convenient, meanwhile, impact on direct current capacitors and rectification devices in the power units during supply of high voltage electricity can be limited, the service life of the high-voltage frequency converter is prolonged, and the reliability of the high-voltage frequency converter is improved.

Description

technical field [0001] The invention relates to high-voltage frequency conversion technology, in particular to a high-voltage frequency converter for centralized charging of power units. Background technique [0002] High-voltage frequency converters are widely used in various fields due to their excellent speed regulation performance and remarkable power-saving effect. When the high-voltage inverter starts to be powered on, the capacitor bank of the power unit is initially at zero voltage, and the inrush current at the moment of starting is very large, which will have adverse effects on the internal energy storage electrolytic capacitor bank of the power unit, the rectifier components and the power consumption of the user. . [0003] In order to prevent the damage of the high-voltage inverter caused by the "surge" of the initial charging of the capacitor bank when the power unit of the high-voltage inverter is powered on, the general solution is that each power unit of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/00H02M1/36
CPCH02M5/458H02M1/32
Inventor 杨顺禄黄顺杭梁国陶刘浩
Owner GUANGDONG MINGYANG LONGYUAN POWER ELECTRONICS
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