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Gate Drivers with Short Circuit Protection

A gate driver, timer technology, applied in electric vehicles, converter types, electric vehicle charging technology, etc., can solve problems such as voltage spikes at both ends of the switch

Active Publication Date: 2021-04-27
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also a DC-DC converter or VVC has an inductor which can cause a voltage spike across the switch when the switch is turned on and energy is stored in the field of the converter's inductor

Method used

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  • Gate Drivers with Short Circuit Protection
  • Gate Drivers with Short Circuit Protection
  • Gate Drivers with Short Circuit Protection

Examples

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Embodiment Construction

[0015] Embodiments of the disclosure are described herein. It should be understood, however, that the disclosed embodiments are merely examples and that other embodiments may take various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. As will be understood by persons of ordinary skill in the art, various features shown and described with reference to any one of the figures may be combined with features shown in one or more other figures to create embodiments not explicitly shown or described . The combinations of features shown provide representative embodiments of typical applications. However, various combinations and modifications of the feature...

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Abstract

A vehicle includes an electric machine configured to provide propulsion to the vehicle, and a power inverter configured to supply power to the electric machine from a traction battery using first and second switches configured as a half bridge, wherein the first switch is gate pole driver control. The gate driver is configured to: operate in soft-off mode when the load current exceeds the threshold for a period defined by the mask timer; operate in fast-off mode when the load current is below the threshold; and A shutdown request is received after the threshold is exceeded and before the mask timer expires, enabling soft shutdown mode.

Description

technical field [0001] The present application generally relates to gate drivers for solid state switches where feedback from the switch is used to detect and provide short circuit protection of the switch. Background technique [0002] Electric vehicles, including hybrid electric vehicles (HEVs) and battery electric vehicles (BEVs), rely on traction batteries to provide electric power for propulsion to traction motors, and power inverters in between to convert direct current (DC) power to alternating current (AC )power. A typical AC traction motor is a three phase motor that can be powered by 3 sinusoidal signals, each driven 120 degrees phase separated. Traction batteries are configured to operate within a specific voltage range and provide maximum current. Traction batteries are alternatively referred to as high voltage batteries, where a typical traction battery has a terminal voltage in excess of 100 volts DC. However, improved performance of the electric machine can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/08H03K17/08
CPCH02M1/08H03K17/08B60L3/0038B60L2210/40B60L2240/80H02M1/32H02M3/158H02M7/5387H03K17/0406H03K17/168H02M1/007Y02T10/70Y02T10/7072Y02T10/72Y02T90/14B60L53/14H02M7/537
Inventor 周彦杨水涛陈礼华徐帆默罕默德·胡尔希德·阿拉姆
Owner FORD GLOBAL TECH LLC
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