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Method and apparatus for sintering detection of motor contactor

A technology of motor contactor and detection method, which is applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve problems such as waste, increase cost, and affect the results of sintering detection, so as to improve accuracy, reduce hardware costs, and reduce sintering detection cost effect

Active Publication Date: 2017-02-15
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For the above method of confirming whether the motor contactor is sintered, there are the following disadvantages: in a more complex working environment, the voltage sampling sensor is more susceptible to electromagnetic interference, thereby affecting the results of sintering detection; secondly, the electromagnetic

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  • Method and apparatus for sintering detection of motor contactor
  • Method and apparatus for sintering detection of motor contactor
  • Method and apparatus for sintering detection of motor contactor

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Embodiment Construction

[0026] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0027] The sintering detection method and device of the motor contactor according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0028] figure 1 It is a flowchart of a method for detecting sintering of a motor contactor according to an embodiment of the present invention. Such as figure 1 As shown, the sintering detection method of a motor contactor according to an embodiment of the present invention includes the following steps:

[0029...

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Abstract

The invention discloses a method and apparatus for sintering detection of a motor contactor. The method comprises the steps of S1, applying three-phase unbalanced voltage to a motor; S2, detecting a three-phase current flowing through the motor contactor; and S3, determining, according to the three-phase current flowing through the motor contactor, whether the motor contactor is sintered. The method for the sintering detection of the motor contactor in the embodiment of the invention is simple and practicable, reduces the hardware cost, avoids the influence of the electromagnetic induction on the detection result and improves the accuracy of the detection result.

Description

Technical field [0001] The invention relates to the technical field of power electronics, and in particular to a method and device for detecting sintering of a motor contactor. Background technique [0002] While using a high-voltage drive motor, how to prevent equipment damage or safety issues caused by the sintering of the motor contactor is an important consideration for the use of the motor. The commonly used method of motor contactor sintering detection in related technologies uses the principle that once the motor contactor is sintered, the voltage across the motor contactor should be equal. It can be confirmed whether the motor contactor is sintered by applying voltage on the power supply side and then detecting the voltage at both ends. [0003] For the above method of confirming whether the motor contactor is sintered, there are the following shortcomings: In a more complex working environment, the voltage sampling sensor is more susceptible to electromagnetic interferenc...

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Application Information

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IPC IPC(8): G01R31/00
Inventor 张凡汤哲晴张鑫鑫杜智勇
Owner BYD CO LTD