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A health state monitoring method for thermally conductive silicone grease and cooling fan

A technology of heat-conducting silicone grease and heat-dissipating fans, which is applied in the direction of measuring electricity, measuring devices, and thermal development of materials. It can solve problems such as the difficulty of achieving a thermal balance state, and achieve the effect of reducing costs and complexity of operation.

Active Publication Date: 2022-01-28
HOHAI UNIV
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Problems solved by technology

And because the device is turned on and off, the temperature of the air-cooled heat dissipation system is always in a fluctuating state, so the thermal balance state is difficult to achieve during the operation of the power electronic device

Method used

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  • A health state monitoring method for thermally conductive silicone grease and cooling fan
  • A health state monitoring method for thermally conductive silicone grease and cooling fan
  • A health state monitoring method for thermally conductive silicone grease and cooling fan

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Embodiment Construction

[0021] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] See figure 1 , which shows the health status monitoring method of thermal conductive silicone grease and cooling fan according to the present invention, including steps:

[0023] a. According to the physical connection structure of the device, thermal grease, heat sink and cooling fan, a second-order equivalent Caulier network model is established;

[0024] In this embodiment, step a specifically includes: according to the morphological structure formed by sequentially installing the device, thermal grease, radiator and cooling fan from top to bottom, divide the device and thermal grease into the first layer, the radiator and The cooling fan is divided into the second layer, and then the second-order equivalent Kaur heat network model is established, such as figure 2 shown.

[0025] b. According to the magnitude rel...

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Abstract

The invention discloses a health state monitoring method for thermally conductive silicone grease and a cooling fan. First, a second-order equivalent Cauer thermal network model is established according to the physical connection structure of the device, the thermally conductive silicone grease, the radiator and the cooling fan; The order of magnitude difference between the order thermal parameters is used to establish the mapping relationship between the thermal network time constant and the various order parameters in the thermal network model; to obtain the time constant of the thermal grease and the health state of the cooling fan, and based on the time constant, the thermal grease and monitor the health status of cooling fans. The present invention can monitor the aging degree of the thermal conductive silicone grease and the cooling fan at the same time, and does not need to measure the heating loss, thereby reducing the cost of hardware and the complexity of operation.

Description

technical field [0001] The invention relates to a method for monitoring power equipment, in particular to a method for monitoring the health status of heat-conducting silicone grease and cooling fans. Background technique [0002] With the continuous increase of installed capacity of new energy power generation, power electronic devices have been applied on a large scale. At the same time, due to the continuous improvement of power density, the problem of thermal failure of power electronic devices is particularly prominent. In order to reduce the temperature during the operation of power electronic devices and consider the related economic costs, air-cooled heat dissipation systems have been widely used. The system mainly includes: thermal grease, heat sink and cooling fan. Although the air-cooled heat dissipation system provides a good heat dissipation effect for power electronic devices, relevant industry survey results show that the reliability of the system is not hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20G01R31/00
CPCG01N25/20G01R31/00
Inventor 张军张犁吴峰成瑜
Owner HOHAI UNIV
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