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Stray inductance detection device for laminated busbar

A technology of laminated busbar and stray inductance, applied in the field of electric power, can solve the problems of poor measurement accuracy, poor flexibility, inability to accurately measure the size of stray inductance, etc., and achieve the effect of high measurement accuracy and cost reduction.

Active Publication Date: 2018-01-23
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing method of instrument measurement requires special instruments, which greatly increases the cost, and the stray inductance cannot be accurately measured when the stray inductance is extremely small
[0004] Therefore, the disadvantages of the existing technology are that the measurement accuracy is poor, the flexibility is poor, and the measurement of low inductance cannot be realized, and the cost is also high

Method used

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  • Stray inductance detection device for laminated busbar
  • Stray inductance detection device for laminated busbar

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Embodiment Construction

[0013] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0014] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...

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Abstract

The present invention proposes a stray inductance detection device for laminated busbars, including: a switch module, the switch module includes a freewheeling unit and a switch unit; a pulse generation module, used to generate a driving pulse signal to enable the switch unit to conduct pass; a DC voltage source, the first output end of the DC voltage source is connected to the freewheeling unit, and the second output end of the DC voltage source is connected to the switch unit; After the first path and the second path of the busbar are connected in parallel with the freewheeling unit, the detection module is used to detect the voltage and current changes generated by the laminated busbar to be tested when the switch unit is turned on rate, and calculate the stray inductance of the laminated busbar to be tested according to the voltage and current rate of change. The device can improve detection accuracy and reduce detection cost.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a device for detecting stray inductance of laminated busbars. Background technique [0002] The laminated busbar can effectively reduce the stray inductance generated by the connecting wires due to its laminated structure. For devices working in a high-frequency switching state, reducing the stray inductance can reduce the turn-off voltage spike caused by high-speed shutdown of large currents, which can protect the device and improve performance. Especially for the switching device IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), because it works in a high-frequency switching state of several thousand hertz or even tens of thousands of hertz, the stacked design of the busbar can effectively reduce the number of lines The stray inductance, thereby reducing the peak voltage when the IGBT is turned off, makes the IGBT operate reliably in the safe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/26
Inventor 林玉文尹雪芹王营辉
Owner BYD CO LTD
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