Title:
A drive circuit which drives one or more contactors which electrically connect the battery and inverter of electric vehicles, and a diagnosing method which diagnoses the state of a voltage actuator
Document Type and Number:
Japanese Patent JP5988231
Kind Code:
B2
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 less than a first threshold value. The microprocessor sets a second diagnostic flag equal to a second value if a second filtered voltage value is greater than a second 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.
Inventors:
Craig William Grupid
Application Number:
JP2015520021A
Publication Date:
September 07, 2016
Filing Date:
June 27, 2013
Export Citation:
Assignee:
LG HAUSYS,LTD.
International Classes:
B60L3/00; H03K17/00; H03K17/08
Domestic Patent References:
| JP2006136095A | ||||
| JP2002345102A | ||||
| JP2000059919A | ||||
| JP7087608A | ||||
| JP2000166281A | ||||
| JP9284902A | ||||
| JP2005136945A |
Foreign References:
| US20100207635 | ||||
| US6919726 |
Attorney, Agent or Firm:
Shinya Mitsuhiro
Takashi Watanabe
Takashi Watanabe
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