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Diode detection method and device

A detection method and diode technology, applied in the field of diodes, can solve the problems of reverse breakdown, unsatisfactory effect, heat generation, etc.

Active Publication Date: 2021-07-23
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using this detection method to determine the diodes that meet the requirements, in actual use, there are still some problems such as serious heating and reverse breakdown.
Therefore, the traditional diode detection method is not ideal.

Method used

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  • Diode detection method and device

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Embodiment Construction

[0025] The technical content of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] In traditional diode hardware design, the designer's evaluation criteria for diodes generally start from the voltage or current unilaterally, for example, the maximum value of the voltage (or current) cannot exceed the rated value. The inventors found that among the qualified diodes detected by this traditional detection method, a certain amount of diodes still have problems such as serious heating and reverse breakdown during use. In this regard, after research, the inventor believes that in the switching state stage of the diode, the voltage value and the current value alone do not exceed the rated value, but the loss of the diode occurs because the power of the diode is high at this time, and the diode may appear If the power exceeds the rated limit, it will cause serious heating, reverse breakdown and other...

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Abstract

The invention discloses a diode detection method and device. Wherein, the method includes: obtaining first power, wherein the first power is determined based on a first voltage and a first current, and the first voltage and the first current are respectively the diodes in the first conduction state After reaching the second cut-off state, the voltage and current across the diode, and the diode enters the cut-off state under the action of the instantaneous reverse voltage; obtain the second power, wherein the second power is based on the second voltage and the second current, the second voltage and the second current are respectively the voltage and current across the diode in the second conduction state after the instantaneous reverse voltage disappears; based on the first A power, a first power threshold, the second power and the second power threshold determine the detection result of the diode. By adopting the invention, the safety of the diode can be evaluated comprehensively and accurately.

Description

technical field [0001] The invention relates to diodes, in particular to a diode detection method and device. Background technique [0002] Diode is a two-electrode electronic component with asymmetric conductance. It is often used in circuits to stabilize voltage and improve circuit electromagnetic compatibility (Electro Magnetic Compatibility, EMC). An ideal diode has zero resistance between its two electrodes (anode and cathode) when conducting forward, and infinite resistance when conducting reverse. Diode is a device widely used in electronic circuits, which has the advantages of small size, light weight, long life, firmness and shock resistance. The function of the diode in the circuit is mainly through its on-state and off-state to realize the functions of diode freewheeling and protection. Since the switching process is often accompanied by sudden changes in current and voltage, rapid changes in current and voltage will lead to damage and consumption of devices. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/26
CPCG01R31/2601G01R31/2632
Inventor 李卓翰高小丽许敏王习文张纪东
Owner GREE ELECTRIC APPLIANCES INC