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Low-Cost Circuit to Detect Faults of ISC Outputs and/or HV Bus Shorted to Chassis

A circuit and bus technology, applied in the field of fault detection circuits, can solve problems such as damage to ISC control devices

Inactive Publication Date: 2014-10-01
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If not addressed quickly, this common mode current can damage ISC controls and other modules directly coupled to the DC bus

Method used

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  • Low-Cost Circuit to Detect Faults of ISC Outputs and/or HV Bus Shorted to Chassis
  • Low-Cost Circuit to Detect Faults of ISC Outputs and/or HV Bus Shorted to Chassis
  • Low-Cost Circuit to Detect Faults of ISC Outputs and/or HV Bus Shorted to Chassis

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Embodiment Construction

[0015] Exemplary embodiments of the present invention are disclosed herein as needed. The various embodiments are intended as non-limiting examples of various ways of implementing the invention, and it is understood that the invention may be embodied in alternative ways. The present invention will be described more fully hereinafter with reference to the accompanying drawings, wherein like reference numerals refer to like elements throughout the several views, and in which exemplary embodiments are shown. The figures are not necessarily to scale and some features may be exaggerated or minimized to show details of particular elements, while related elements may have been removed to avoid obscuring novel parts. Specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention. For example, although the ...

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PUM

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Abstract

A low cost fault detection and protection method and embodiment circuit can detect short circuit faults between an inverter system control (ISC) circuit outputs and a chassis, an electrical machine winding and a chassis, and a DC bus and a chassis. A fault protection unit (FPU) can monitor chassis voltage with respect to a DC bus to detect the presence of a short circuit fault, and provide status output indication of whether a fault is detected. By way of example, an FPU can include a window detector and a signal transmitter. An FPU can provide status output to an ISC controller configured to terminate ISC operation when any of the aformentioned faults is present, thereby preventing damage to devices contained in the ISC circuit.

Description

technical field [0001] The present invention relates generally to fault detection circuits, and more particularly to fault detection circuits for vehicular electric drive systems. Background technique [0002] Electric vehicles, which reduce fossil fuel consumption and atmospheric emissions by using electric drive systems to supplement or replace internal combustion engines. Typically, an electric drive system includes an energy source, an energy conversion system, and an electric motor powered by the energy conversion system and configured to drive a load. Typically, the energy source is in the form of an energy storage device, eg a high voltage battery. Typically, an energy conversion system includes an inverter system control (ISC) configured to receive a DC voltage from a battery and provide an AC phase current to an electric machine, such as an electric motor configured to drive a wheel set of an electric vehicle. [0003] The ISC can be connected to the high-voltage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18B60L11/12B60L50/15
CPCG01R31/025G01R31/006B60L3/0069B60L3/04B60L15/007B60L2220/14B60L50/40B60L50/51Y02T10/70Y02T10/64
Inventor 陈礼华
Owner FORD GLOBAL TECH LLC
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