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Equipotential connection method and use in water cooling system of power electronic device

A technology of power electronic devices and connection methods, which is applied in the direction of output power conversion devices, cooling/ventilation/heating transformation, electrical components, etc., can solve the problems of scaling on the inner wall of water-cooled radiators, affecting device performance, and water leakage, etc., and achieve improvement The effect of operational reliability, additional investment, and ease of use

Inactive Publication Date: 2005-05-18
JIANGSU UNIV
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Problems solved by technology

[0002] In general circulating water cooling high-power power system devices, if the insulation resistance of circulating water is not high enough, the waterway interface (faucet) will be ionized and corroded gradually under the action of potential difference, and then water leakage will occur, destroying the insulation of the device Performance and service life
Chinese Patent Application No.: 03124302, "Cooling Device for Electronic Machines", which proposes adding a method to suppress ionization in cooling water, that is, in the power system, an ion exchanger composed of ion exchange resin pre-adsorbed with corrosion inhibitors is set. And add corrosion inhibitors to the coolant, but it increases the additional investment and maintenance of the entire high-power power system device, reduces the electrical insulation performance of the system, scales the inner wall of the water-cooled radiator, and reduces the cooling effect of the water-cooled radiator. Affect the performance of the device

Method used

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  • Equipotential connection method and use in water cooling system of power electronic device
  • Equipotential connection method and use in water cooling system of power electronic device
  • Equipotential connection method and use in water cooling system of power electronic device

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Embodiment Construction

[0015] The following examples will further illustrate the present invention, but do not limit the present invention thereby.

[0016] In high-current power electronic power conversion systems, the same power electronic device is generally used to form the power conversion main circuit. Due to the limitation of the manufacturing capacity of power electronic devices, parallel use of devices is often required in high-current power conversion applications. The parameters of the components used in parallel are required to be very close, and it can be considered that the difference in the pressure drop of the on-state tubes is approximately zero. like figure 1 As shown, the circuit in the high-power electrochemical power supply equipotential water cooling system has 12 vertically installed bridge arms, such as image 3 As shown, there are five thyristor parallel branches on each arm, such as figure 2 As shown, a thyristor is connected in series with a fast fuse 11 on each paralle...

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Abstract

This invention relates to a large power electronic power system device. According to the principle that the current of flowing over cooling brance circulation water is not greater than 0.5mu A, a cooling branch is found out with zero or approaching to zero transient potential difference at both ends as the equipotential connecting branch. Each cooling branch carries away almost the same heat from the heat balance point of view and the cooling branches share one set of water collecting pipes connecting to a same DC bus electric element.

Description

technical field [0001] The invention relates to a high-power electric electronic device requiring cooling by circulating water, in particular to an equipotential connection method and its application in the water cooling system of the electric electronic device. It is especially suitable for high-current AC-DC, AC-AC, DC-AC power electronic power conversion devices. The circulating water cooling system includes multiple cooling branches with different potentials and large potential differences. Equipotential connection is used to connect poles Greatly improve the operation reliability and safety of the device. Background technique [0002] In general circulating water cooling high-power power system devices, if the insulation resistance of circulating water is not high enough, the waterway interface (faucet) will be ionized and corroded gradually under the action of potential difference, and then water leakage will occur, destroying the insulation of the device performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K7/20
Inventor 郑宏董洁朱益华
Owner JIANGSU UNIV
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