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Cooling fan speed setting method suitable for temperature closed-loop adjustment of power electronic device

A power electronic device, temperature closed-loop technology, applied in the direction of temperature control, control/regulation system, non-electric variable control, etc., can solve problems such as poor reliability, failure of power electronic devices, failure of heat dissipation system, etc., to improve reliability and prevent The effect of thermal failure

Active Publication Date: 2019-12-10
NARI TECH CO LTD +1
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AI Technical Summary

Problems solved by technology

The wind speed setting method of the existing cooling fan can be automatically adjusted according to the temperature, but its reliability is poor, because it relies heavily on the temperature of the power electronic device, and if the temperature of the power electronic device is not collected on time, it may cause the cooling system to fail. lead to failure of power electronic devices

Method used

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  • Cooling fan speed setting method suitable for temperature closed-loop adjustment of power electronic device

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Embodiment Construction

[0014] see figure 1 As shown, a power electronic converter cooling system is taken as an example to describe a specific implementation of the present invention.

[0015] The converter controller first reads the internal temperature T of the power electronic converter module, according to the temperature and wind speed linear correlation formula (Vs=K*T+S0, V is the given wind speed of the cooling system, K is the temperature and wind speed correlation coefficient, S0 Calculate the wind speed Vs for the basic wind speed when the temperature is 0°C.

[0016] Then, the converter controller reads the ambient temperature Tc and the apparent power S of the current power electronic converter device, and sets the relationship according to the minimum safe wind speed and the ambient temperature and apparent power of the device (Vs_min=A1*S+B* Tc, where Vs_min is the given value of the minimum safe wind speed, A1 is the correlation coefficient of the minimum safe wind speed of the powe...

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Abstract

The invention provides a cooling fan speed setting method suitable for temperature closed-loop regulation of a power electronic device, which comprises the following steps of: firstly, primarily calculating the wind speed from the temperature of the power electronic device to obtain a reference wind speed, and then calculating the minimum safety rotating speed set by the wind speed of a cooling fan from the angles of heat productivity and environment temperature; then verifying the reference wind speed by using the safe rotating speed to prevent the reference wind speed from being lower than the safe rotating speed due to power electronic temperature sampling deviation. Meanwhile, when the temperature of the power electronic device is accurately sampled, the reference wind speed is given as the effective wind speed, so that the purpose of controlling the temperature of the power electronic device is achieved. The reliability of the power electronic heat dissipation system can be effectively improved, and the problem of heat dissipation failure caused by failure of a single sensor is prevented.

Description

technical field [0001] The present application relates to the field of electronic components, in particular to a method for setting the speed of a heat dissipation fan of a power electronic device. Background technique [0002] In high-power power electronic equipment, power components such as IGBTs are one of the main heat sources, and forced air cooling with high reliability is often used for cooling. The cooling fan of high-power power electronic equipment consumes a lot of power, usually reaching more than several thousand watts, and the energy consumption is relatively high. Therefore, in order to improve the energy efficiency of power electronic equipment, frequency conversion cooling fans are usually used on high-power power electronic equipment, and the wind speed of the fan can be adjusted according to the actual operation of the equipment, so as to achieve the purpose of energy saving and efficiency increase while ensuring the safety of equipment operation. The wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/20
CPCG05D23/20
Inventor 王俊辉王腾飞宋飞孙海洋曹鹏刘良尹航王小红侯凯
Owner NARI TECH CO LTD
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