Invention Grant
US09050893B2 Driver circuit for an electric vehicle and a diagnostic method for determining when a first voltage driver is shorted to a high voltage and a second voltage driver has a low electrical current flowing therethrough
有权
用于电动车辆的驱动电路和用于确定第一电压驱动器何时短路到高电压并且第二电压驱动器具有流过其中的低电流的诊断方法
- Patent Title: Driver circuit for an electric vehicle and a diagnostic method for determining when a first voltage driver is shorted to a high voltage and a second voltage driver has a low electrical current flowing therethrough
- Patent Title (中): 用于电动车辆的驱动电路和用于确定第一电压驱动器何时短路到高电压并且第二电压驱动器具有流过其中的低电流的诊断方法
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Application No.: US13537236Application Date: 2012-06-29
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Publication No.: US09050893B2Publication Date: 2015-06-09
- Inventor: Craig William Grupido
- Applicant: Craig William Grupido
- Applicant Address: KR Seoul
- Assignee: LG Chem, Ltd.
- Current Assignee: LG Chem, Ltd.
- Current Assignee Address: KR Seoul
- Agency: Buckert Patent & Trademark Law Firm, PC
- Agent John F. Buckert
- Main IPC: B60L1/00
- IPC: B60L1/00 ; H01H47/00 ; H01H47/04 ; H01H47/32

Abstract:
A driver circuit and a diagnostic method are provided. The driver circuit includes a first voltage driver, a second voltage driver, and a microprocessor. The microprocessor generates a first pulse width modulated signal to induce the first voltage driver to output a second pulse width modulated signal to energize a contactor coil. The microprocessor sets a first diagnostic flag equal to a first value if a first filtered voltage value is greater than a first threshold value. The microprocessor sets a second diagnostic flag equal to a second value if a first filtered current value is less than a threshold value. The microprocessor stops generating the first pulse width modulated signal to de-energize the contactor coil if the first and second diagnostic flags are set equal to the first and second values, respectively.
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