发明名称 |
Motor driver interface fault detection apparatus using initial turn-on and noise timers |
摘要 |
A motor driver interface (MDI) circuit includes fault detection apparatus effective to detect short circuits to the power supply in the switching transistors of an H-bridge reversible DC motor arrangement. A pair of timers distinguishes a true fault condition. The first timer is responsive to a continuous fault detection to define a first time period from its initiation; and a second timer is responsive to a continuous presence of a transistor conduction signal to define a second time period from its initiation. The apparatus stores a fault signal in response to the detection of the fault condition at the end of the first or second time periods with the first timer providing fault detection upon turn-on after the brief initial high transistor turn-on current and the second timer providing noise immunity.
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申请公布号 |
US5111123(A) |
申请公布日期 |
1992.05.05 |
申请号 |
US19900615694 |
申请日期 |
1990.11.16 |
申请人 |
DELCO ELECTRONICS CORPORATION |
发明人 |
HACH, LARRY R.;KELLEY, GERARD F. |
分类号 |
G01R31/02;G01R31/40;H02H1/04;H02H7/08 |
主分类号 |
G01R31/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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