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Heat memory method after power failure of converter with heat radiator

A technology of thermal memory and heat sink, applied in the field of thermal memory, can solve problems such as high cost, reduced system reliability, complex circuit, etc., and achieve low cost, easy implementation, and good stability

Active Publication Date: 2015-04-01
CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This kind of implementation method must add certain hardware on the basis of the original design, which makes the circuit complex, high cost, and reduces the reliability of the system.

Method used

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  • Heat memory method after power failure of converter with heat radiator
  • Heat memory method after power failure of converter with heat radiator
  • Heat memory method after power failure of converter with heat radiator

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0021] Such as figure 2 and image 3 As shown, the present invention has designed a kind of thermal memory method after the converter with radiator loses power, comprises following concrete steps:

[0022] Step (1): The converter reads the thermal memory value Z of the object to be thermally memorized when it was powered off last time from the storage unit j_lat and the temperature rise value of the radiator at the last power-off time Z n_lat , when the converter is powered on this time, the temperature of the heat sink is measured as T S and the ambient temperature is T 0 , using the formula Z n_on =k(T S -T O ) to obtain the temperature rise value of the radiator that is powered on this time Z n_on , where k is defined as a correction coefficient;

[0023] Step (2): Using the Differential Equation of State ...

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Abstract

The invention discloses a heat memory method after a power failure of a converter with a heat radiator. The invention also discloses a heat memory device after the power failure of the converter with the heat radiator. The heat radiator comprises a heat radiator body, a heat radiator temperature obtaining unit, a storage unit and a unit to be heat-memorized, and also comprises a temperature rise computing unit. The heat memory method and device after the power failure of the converter with the heat radiator can be used for realizing a heat memory function by means of the temperature characteristic of the heat radiator on a power device in the converter.

Description

technical field [0001] The invention relates to a thermal memory method and a device thereof after a converter with a radiator loses power. Background technique [0002] In the current converter, some components have such a situation that they work for a certain period of time, then lose power, and then put into operation immediately, while the initial value of the relevant protection does not change at all, and continues to maintain a fixed value , which often results in thermal damage to components. For example, the IGBT components in the converter have such hidden dangers. Assume that when the IGBT is put into operation under certain conditions, the temperature of the IGBT is 25°C. After 100 seconds, it reaches the limit temperature of the IGBT of 120°C. At this time, it must be protected, otherwise continue to work , thermal damage will occur; if put into work under the same conditions above, the temperature of the IGBT is also 25°C when put into work, but when the time...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/00
Inventor 唐雪峰顾鸣刚刘奕骋李志鹏王峰管瑞良
Owner CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
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