Unlock instant, AI-driven research and patent intelligence for your innovation.

Apparatus and method for detecting abnormality of high voltage circuit

A high-voltage circuit and anomaly detection technology, which is applied to electrical devices, measuring devices, and electrical devices in testing and transportation, and can solve problems such as non-detection

Active Publication Date: 2015-05-20
NISSAN MOTOR CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the above-mentioned technique can detect the ground fault of the DC power supply, it has the disadvantage that it cannot detect the case where looseness occurs in the connection part such as the wires that mechanically fix the DC power supply and the inverter circuit.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Apparatus and method for detecting abnormality of high voltage circuit
  • Apparatus and method for detecting abnormality of high voltage circuit
  • Apparatus and method for detecting abnormality of high voltage circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Embodiments of the present invention will be described below based on the drawings.

[0033] Such as figure 1 As shown, the high-voltage circuit A of the present invention is provided with a DC power supply 1 and an inverter circuit 2, and the DC power output from the DC power supply 1 is converted into AC power in the inverter circuit 2, and supplied to an electric vehicle or a hybrid vehicle, etc. A driving motor (not shown) and the like supply electric power. Between the positive side terminal of the DC power supply 1 and the positive side terminal of the inverter circuit 2, a connecting portion p2 is provided to electrically connect the DC power supply 1 and the inverter circuit 2 by mechanically fixing or connecting the wires and terminals.

[0034] An abnormality detection device 3 according to an embodiment of the present invention is a device for detecting a ground fault of the high-voltage circuit A and looseness of the coupling part p2, and includes a first c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Disclosed are abnormality detecting apparatus and method for a high-voltage circuit (A), in which: a square wave pulse is outputted to a measuring point (p1) with a switch (SW1) set off, the switch (SW1) provided between an inverter circuit (2) and the ground, a difference voltage (Vp-p) between a voltage (Vh) detected at a phase of T / 2 and a voltage (V1) detected at a phase of T is obtained, the occurrence of a ground fault is detected based on the size of the difference voltage (Vp-p); and the square wave pulse is outputted to the measuring point (p1) with the switch (SW1) set on, and it is judged that a loosening of a fastening section (p2) occurs when the difference voltage (Vp-p) exceeds a reference voltage (Vref2).

Description

technical field [0001] The present invention relates to an abnormality detection device and an abnormality detection method for detecting a ground fault of a high-voltage circuit mounted on a vehicle and looseness of a coupling part that mechanically fixes electric wires and the like. Background technique [0002] (Japanese) Unexamined Patent Publication No. 2003-250201 discloses a technique in which a capacitor is connected to a positive side terminal of a high-voltage DC power supply provided in an electric vehicle, and a rectangular wave signal is applied to a measurement point at the other end of the capacitor. The voltage signal generated at this measuring point is detected and a ground fault of the DC power supply is detected. [0003] Although the above technique can detect the ground fault of the DC power supply, it has the disadvantage that it cannot detect the fact that a coupling part such as an electric wire which mechanically fixes the DC power supply and the in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02B60L3/00
CPCB60L3/0023B60L3/0069G01R31/006G01R31/52
Inventor 原佑一星野典子森田刚
Owner NISSAN MOTOR CO LTD