公开(公告)号：US06456083B1

公开(公告)日：2002-09-24

申请号：US09518615

申请日：2000-03-03

申请人： Kirit A. Thakkar ,  Cheryl Greenly ,  William Amato ,  Roman Marchak

发明人： Kirit A. Thakkar ,  Cheryl Greenly ,  William Amato ,  Roman Marchak

IPC分类号： G01R3100

CPC分类号： H02H11/005 ,  B60T8/885 ,  B60T2270/415

摘要： A method and apparatus for diagnosing short circuit conditions in a circuit protects circuit components from being damaged during a diagnostic operation. The apparatus includes a control processor, a control circuit coupled to the control processor, and an A/D converter coupled to the control processor and the control circuit. In operation the control processor disables operation of an A/D converter after completion of a conversion operation, enables operation of the control circuit after operation of the A/D converter has been disabled, enables operation of the A/D converter to obtain an analog signal from the control circuit after operation of the control circuit has been enabled, and disables operation of the control circuit after enabling operation of the A/D converter to obtain the analog signal. The A/D converter converts the analog signal into a digital signal and the control processor analyzes the digital signal to determine if a short circuit condition exits in the control circuit. The control processor enables operation of the control circuit for a period that is less than an over current rating period of components of the control circuit, thereby insuring that the components of the control circuit will not be damaged if a short circuit condition exits.

摘要翻译： 用于诊断电路中的短路条件的方法和装置保护电路部件在诊断操作期间不被损坏。 该装置包括控制处理器，耦合到控制处理器的控制电路和耦合到控制处理器和控制电路的A / D转换器。 在操作中，控制处理器在完成转换操作后禁止A / D转换器的操作，使得A / D转换器工作之后的控制电路的操作已经被禁用，使得A / D转换器能够操作以获得模拟 来自控制电路的控制电路的信号已被使能，并且在A / D转换器的使能操作之后禁止控制电路的操作以获得模拟信号。 A / D转换器将模拟信号转换为数字信号，并且控制处理器分析数字信号以确定短路状况是否在控制电路中退出。 控制处理器能够使控制电路的操作时间小于控制电路的部件的过电流额定周期，从而确保如果短路状态退出则控制电路的部件将不会被损坏。