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Parallel device for power modules and converters and inverters

A power module and parallel technology, which is applied in the field of variable current, can solve the problems of difficulty in popularization, reduce oscillating current, increase development cycle and cost investment, etc., and achieve the effect of improving service life and reducing oscillating current

Active Publication Date: 2018-10-23
BEIJING ETECHWIN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you want to change the large-capacity capacitor, you need to increase the overall volume of the converter, which will involve changes in the overall design of the converter, and greatly increase the development cycle and cost input. Therefore, this method is difficult to popularize
[0005] There is no ideal device in the prior art that can effectively reduce the oscillating current

Method used

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  • Parallel device for power modules and converters and inverters
  • Parallel device for power modules and converters and inverters

Examples

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Embodiment 1

[0024] figure 1 It is a schematic structural diagram of a power module parallel device according to an embodiment of the present invention. The power module parallel device can be used as an internal structure of high-power electrical equipment, such as a converter, a frequency converter, or an inverter.

[0025] Such as figure 1 As shown, the parallel connection device of the power module includes a plurality of parallel connected power modules 5, and the power module 5 includes positive and negative busbars 3, and the positive and negative busbars 3 corresponding to adjacent power modules 5 are connected one by one through the connection block 6, Wherein, the equivalent resistance value of the connection block 6 is different from the equivalent resistance value of the positive and negative bus bars 3 .

[0026] In this embodiment, the power module 5 and the connection device (such as the positive and negative busbar 3 or the connection block 6) used to connect the power mod...

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Abstract

The embodiment of the invention provides a parallel device for power modules, a converter and an inverter. Each power module comprises positive and negative busbars, wherein the positive and negative busbars corresponding to the adjacent power modules are connected with each other through connection blocks in a manner of one-to-one correspondence; and equivalent resistances of the connection blocks are different from those of the positive and negative busbars. The parallel device for the power modules, the converter and the inverter provided by the invention are simple in design and low in cost; and oscillating current among the power modules is effectively reduced under the condition of not adding a component, so that the service life of the power modules is prolonged.

Description

technical field [0001] The invention relates to the field of converter technology, in particular to a power module parallel device, a converter and an inverter. Background technique [0002] With the continuous development of power electronics technology, in the converters or frequency converters of large-scale power equipment such as wind turbines, DC bus support capacitors are often used to buffer the energy exchange between the DC power supply and the load and stabilize the DC bus voltage. In order to adapt to the improvement of the power level of the converter and increase the capacity of the converter, the requirements for the maintainability, modularization and parallel design of multiple components of the converter design are all raised, so as to optimize the design layout of the converter. [0003] The modular design inside the converter is mainly composed of DC bus support capacitors and power electronic devices together to form a power module, and then the power mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/00
CPCH02M7/003
Inventor 刘博超贾北平亢艳茹
Owner BEIJING ETECHWIN ELECTRIC