Method for measuring energy loss of power electronic device of high-power converter

A technology of power electronic devices and energy loss, which is applied to measuring devices, measuring heat, measuring electrical variables, etc., can solve problems affecting the accuracy of measurement methods, and achieve the effect of reducing measurement errors

Inactive Publication Date: 2011-02-09
乌云翔
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  • Abstract
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  • Application Information

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Problems solved by technology

However, in actual situations, the energy consumption of the device is not completely taken out by the cooling fluid,

Method used

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  • Method for measuring energy loss of power electronic device of high-power converter
  • Method for measuring energy loss of power electronic device of high-power converter
  • Method for measuring energy loss of power electronic device of high-power converter

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Embodiment Construction

[0027] Preferred embodiments of the present invention are described in detail as follows in conjunction with accompanying drawings:

[0028] Embodiments of the present invention such as image 3 As shown, compared to figure 1 In the traditional solution shown, the present invention additionally installs a cavity made of heat insulating material to limit the heat conduction and heat radiation of the device loss to the surrounding air.

[0029] In the present invention, a temperature measurement probe is installed outside the cavity to measure the ambient temperature outside the cavity in real time. The temperature measurement scheme is composed of a PT100 thermistor and a typical measurement circuit. The measurement of the ambient temperature outside the cavity is mainly to control the temperature difference P between the inside and outside of the cavity error , try to reduce the measurement error caused by the thermal leakage of the device measurement loss. The actuator tha...

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Abstract

The invention relates to a novel method for measuring the energy loss of a power electronic device of a high-power converter. In order to avoid the energy loss generated by a device from leaking into surrounding air in a heat way, the method of the invention is additionally provided with a cavity with thermal insulation based on a traditional measuring method, the air temperature in the cavity is controlled to approach to the outside temperature of the cavity as much as possible so as to reduce the heat emitted to air from the cavity, and therefore most of the energy loss of the leaked heat of the device is reserved inside the cavity. When the cavity reaches thermal equilibrium, the residual heat inside the cavity can eventually be brought out by cooling fluid, and therefore the measuring method greatly reduces the heat leakage of the device and improves the accuracy of measuring the energy loss of the device. The method for measuring the energy loss provided by the invention effectively improves the accuracy of measuring the energy loss of the device, brings more accurate and reliable design basis for the design and the development of the converter and has a quite significance for the design optimization of the converter.

Description

Technical field: [0001] The invention relates to a method for measuring energy loss of a power electronic device of a high-power converter. The impact of energy loss of power electronic devices on high-power converters includes output power, hardware design, and cooling. Therefore, the energy loss measurement of converter power electronic devices is an important basis for converter design and development. Background technique: [0002] High-power converters have a broad application background and have become one of the core equipment in many industries. The core component of the converter is a high-power power electronic device (insulated gate bipolar transistor IGBT and power diode Diode), and the main function of the converter is realized by the switch of the power electronic device. [0003] Power electronic devices will form energy loss during the conduction and switching process, and the lost energy is mainly dissipated in the form of heat. The energy loss of the dev...

Claims

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Application Information

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IPC IPC(8): G01K17/08G01R22/00
Inventor 乌云翔邵诗逸
Owner 乌云翔
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