公开(公告)号：EP0690366A1

公开(公告)日：1996-01-03

申请号：EP95303397.4

申请日：1995-05-22

Applicant: TANDEM COMPUTERS INCORPORATED

Inventor： Gunn, Daniel D. ,  Bunton, William Patterson

IPC: G06F1/20 ,  G05B9/03

CPC classification number: G05B9/03

Abstract: A fault-tolerant control and monitoring system for fan assemblies used in electronic equipment. The fan control and monitoring system of the present invention reduces the probability of high temperature damage due to power failure by using a power mixing circuit that provides redundant power to the fans. The system includes means for detecting faults in the power mixing circuit. The system of the present invention further includes means for measuring the exact speed of the fans, as well as means for finer control of fan speed. Physical presence of fan unit is detected without additional pin requirements.

Abstract translation: 风扇监视和控制系统包括功率混合电路，其具有分别用于接收第一和第二电力轨的第一和第二输入，第一对电力轨使能输入和第二对电力轨使能输入， 第一对电源轨状态输出和第二对电源轨状态输出，以及电源输出。 风扇单元具有耦合到功率混合电路的功率输出的功率输入，速度控制输入和速度指示器输出。 第一控制板具有耦合到风扇单元的速度指示器输出的风扇速度指示器输入以及耦合到功率混合电路的第一对电力轨状态输出的一对电力轨状态输入。 一对电力轨使能输出分别耦合到功率混合电路的第一对电力轨使能输入，并且速度控制输出耦合到风扇单元的速度控制输入。 还包括第二个控制板。

公开(公告)号：EP0690554A3

公开(公告)日：1996-07-17

申请号：EP95304573.9

申请日：1995-06-28

Applicant: TANDEM COMPUTERS INCORPORATED

Inventor： Aldridge, David L. ,  Bissell, Stephen R. ,  Gunn, Daniel D.

IPC: H02M3/28

CPC classification number: H02H9/004 ,  H02H3/05 ,  H02J1/10

Abstract: A power mixing apparatus for mixing current from a first and a second power rail includes a first enabling circuit to provide a first enabling signal, a second enabling circuit to provide a second enabling signal, a first inrush limiter to output a first current in response to the first enabling signal, a second inrush limiter to output a second current in response to the second enabling signal, a first open-circuiting circuit to decouple the first enabling circuit from the first inrush limiter when the first open-circuiting circuit is open-circuited, a second open-circuiting circuit to decouple the second enabling circuit from the second inrush limiter when the second open-circuiting circuit is open-circuited, a first isolation circuit to isolate the first inrush limiter from the second current, a second isolation circuit to isolate the second inrush limiter from the first current, and a direct-current converter to convert the first and the second current in response to the first enabling signal and in response to the second enabling signal.

公开(公告)号：EP0690554A2

公开(公告)日：1996-01-03

申请号：EP95304573.9

申请日：1995-06-28

Applicant: TANDEM COMPUTERS INCORPORATED

Inventor： Aldridge, David L. ,  Bissell, Stephen R. ,  Gunn, Daniel D.

IPC: H02M3/28

CPC classification number: H02H9/004 ,  H02H3/05 ,  H02J1/10

Abstract: A power mixing apparatus for mixing current from a first and a second power rail includes a first enabling circuit to provide a first enabling signal, a second enabling circuit to provide a second enabling signal, a first inrush limiter to output a first current in response to the first enabling signal, a second inrush limiter to output a second current in response to the second enabling signal, a first open-circuiting circuit to decouple the first enabling circuit from the first inrush limiter when the first open-circuiting circuit is open-circuited, a second open-circuiting circuit to decouple the second enabling circuit from the second inrush limiter when the second open-circuiting circuit is open-circuited, a first isolation circuit to isolate the first inrush limiter from the second current, a second isolation circuit to isolate the second inrush limiter from the first current, and a direct-current converter to convert the first and the second current in response to the first enabling signal and in response to the second enabling signal.

Abstract translation: 用于混合来自第一和第二电源干线的电流的功率混合装置包括提供第一启动信号的第一启动电路，提供第二启动信号的第二启动电路，响应于第一启动信号而输出第一电流的第一浪涌限制器 所述第一启动信号，响应于所述第二启动信号而输出第二电流的第二浪涌限制器，用于在所述第一开路电路开路时使所述第一启动电路与所述第一浪涌限制器分离的第一开路电路 第二开路电路，用于在第二开路电路开路时使第二使能电路与第二涌入限制器断开耦合，第一隔离电路用于将第一涌入限制器与第二电流隔离，第二隔离电路为第二隔离电路， 将第二涌入限制器与第一电流隔离，以及响应于第一使能电流而转换第一电流和第二电流的直流转换器 并且响应于第二使能信号。