Power supply for computer system manager

• US 5,283,905 A
• Filed: 06/24/1991
• Issued: 02/01/1994
• Est. Priority Date: 06/24/1991
• Status: Expired due to Term

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Compaq Computer Corporation (HP Inc.)
• Inventors: Fulton, Paul R., Hernandez, Thomas J., Heald, Arthur D., Saadeh, Said S., Stupek, Richard A.
• Primary Examiner(s): Fleming, Michael R.
• Assistant Examiner(s): AUVE, GLENN ALLEN
• Application Number:
  US07/719,394
• Time in Patent Office: 953 Days
• Field of Search: 395/750, 395/575, 364/707, 364/273.1, 364/DIG. 1, 364/948.8, 364/DIG. 2, 371/66, 371/14, 371/12, 307/66, 365/226, 365/227, 365/228, 365/229
• US Class Current: 713/324
• CPC Class Codes: G06F 1/28 Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
• CPC Class Codes: G06F 1/32 Means for saving power
• CPC Class Codes: H02J 9/061 for DC powered loads

Abstract

A power supply for a computer system manager, wherein the power supply has its own secondary power source operable when input power to the system manager no longer meets preset threshold values. The power supply functions in one of a discrete number of power modes depending upon the amount of energy available from either the computer input power or the secondary power source. The power supply switches to one of the group of power modes to conserve secondary power when the computer input power is no longer available. The power modes are controlled by a power mode controller which selectively directs power to discrete components of the system manager as a power conservation technique. The power mode controller always energizes the random access memory of the system manager in order to maintain data integrity. Upon detecting insufficient energy within the secondary power source, the power mode controller terminates all power flow from the power supply, including power flow to the random access memory, at which point the entire system has lost all data and configuration settings.

Claims

1. An apparatus for delivering, monitoring and conserving power to an energy demanding device having a variety of individualized components, said individualized components including a random access memory, said apparatus comprising:

at least one input power source;

means for monitoring energy conducted by said input power source;

input power delivery means for delivering energy from said input power source to said energy demanding device;

a secondary power source;

means for monitoring energy conducted by said secondary power source;

secondary power delivery means for delivering energy from said secondary power source to said energy demanding device;

means for switching from said input power delivery means to said secondary power delivery means and for switching from said secondary power delivery means to said input power delivery means as directed by said input power source monitoring means;

means for conserving energy conducted by said secondary power source to said energy demanding device by selectively terminating energy flow to said variety of individualized components when said secondary power source powers said energy demanding device; and

means for terminating all energy flow when said secondary power source monitoring means determines that energy conducted by said secondary power source fails to meet preset threshold values;

said means for conserving energy further comprising means for preserving data stored in said random access memory until all energy flow is terminated by selectively terminating energy flow to said variety of individualized components other than said random access memory when said secondary power source powers said energy demanding device while maintaining energy flow to said random access memory;

wherein said means for switching from said input power delivery means to said secondary power delivery means comprises a switch and a battery load regulator, said switch and battery load regulator being activated by said means for monitoring energy conducted by said input power source.

2. An apparatus for delivering, monitoring and conserving power to an energy demanding device having a variety of individualized components, said individualized components including a random access memory, said apparatus comprising:

at least one input power source;

means for monitoring energy conducted by said input power source;

input power delivery means for delivering energy from said input power source to said energy demanding device;

a secondary power source;

means for monitoring energy conducted by said secondary power source;

secondary power delivery means for delivering energy from said secondary power source to said energy demanding device;

means for switching from said input power delivery means to said secondary power delivery means and for switching from said secondary power delivery means to said input power delivery means as directed by said input power source monitoring means;

means for conserving energy conducted by said secondary power source to said energy demanding device by selectively terminating energy flow to said variety of individualized components when said secondary power source powers said energy demanding device; and

means for terminating all energy flow when said secondary power source monitoring means determines that energy conducted by said secondary power source fails to meet preset threshold values;

said means for conserving energy further comprising means for preserving data stored in said random access memory until all energy flow is terminated by selectively terminating energy flow to said variety of individualized components other than said random access memory when said secondary power source powers said energy demanding device while maintaining energy flow to said random access memory;

wherein said means for conserving energy comprises;

multiple power delivery conduits, each of said conduits separately directed to said variety of individualized components of said energy demanding device; and

means for selectively terminating energy flow through said power delivery conduits.

3. The apparatus according to claim 2 wherein said means for selectively terminating energy flow comprises switches, one of said switches in line with one of said power delivery conduits, said switch severing or completing energy flow through one of said power delivery conduits when said means for conserving energy determines energy levels require reduced or increased flow.

4. An apparatus for delivering, monitoring and conserving power to an energy demanding device having a variety of individualized components, said apparatus comprising:

at least one input power source;

means for monitoring energy conducted by said input power source;

input power delivery means for delivering energy from said input power source to said energy demanding device;

a secondary power source, said secondary power source comprising batteries;

means for monitoring energy conducted by said secondary power source;

secondary power delivery means for delivering energy from said secondary power source to said energy demanding device;

means for switching from said input power delivery means to said secondary power delivery means and for switching from said secondary power delivery means to said input power delivery means as directed by said input power source monitoring means;

means for conserving energy conducted by said secondary power source to said energy demanding device by terminating energy flow to selected ones of said variety of individualized components when said secondary power source powers said energy demanding device; and

means for terminating all energy flow when said secondary power source monitoring means determines that energy conducted by said secondary power source fails to meet preset threshold values;

wherein said means for terminating all energy flow further comprises a battery cut-off relay, said means for conserving energy activating said cut-off relay when said batteries have insufficient power to energize any of said individualized components of said energy demanding device, and a means for boosting energy flow, said energy boosting means required to actuate said battery cut-off relay when said batteries have insufficient power to energize any of said individualized components of said energy demanding device.

5. For an energy demanding device having a variety of individualized components, a method for providing energy to said energy demanding device when input power to said device fails, said method comprising the steps of:

monitoring said input power to said energy demanding device;

delivering said input power to said energy demanding device when said input power meets preset threshold values;

switching from said input power to a secondary power source when said input power fails to meet preset threshold values;

monitoring said secondary power source;

conserving said secondary power source when said input power fails by selectively de-energizing said individualized components of said energy demanding device, said step of conserving said secondary power source comprising the steps of operating in reserve mode wherein said individualized components of said energy demanding device receive energy from said secondary power source, shifting to standby mode wherein less of said individualized components of said energy demanding device receive energy from said secondary power source, and degenerating to dormant mode when only sufficient energy remains within said secondary power source to energize a random access memory and a real time clock;

terminating energy flow from said secondary power source when said secondary power source fails to meet preset threshold values; and

returning to reserve mode from standby mode when one of said individualized components receiving energy from said secondary power source in standby mode generates an interrupt signal.

6. A computer network system having at least one computer system operable therein, said computer system having a plurality of components interconnected by a system bus for transferring information between said components and an input power means for supplying energy to said system, said computer network system comprising:

a system manager comprising a variety of individualized components, said system manager monitoring information transfers along said system bus and processing said information transfers to determine operating conditions within said computer network system;

a power supply operable in one of a discrete number of power modes;

said power supply operably connected to said system manager;

a secondary power source operably connected to said system manager, said secondary power source engaged by said power supply when input power to said computer system fails to meet a first energy level, said secondary power source comprising a battery;

means, operably connected to said system manager and said power supply, for selectively directing said power supply to operate in one of said power modes based upon said operating conditions within said computer network system determined by said system manager, said means for selectively directing said power supply to operate in one of said power modes comprising a power mode controller, said power mode controller monitoring energy within said battery and said input power, and a battery load regulator for initiating battery power upon failure of said input power, said power mode controller selectively switching some of said individualized components of said system manager on and off based upon energy levels available from either said battery or said input power means and said operating conditions within said computer network system determined by said system manager;

said power mode controller maintaining power to a static random access memory housed within said system manager in all power modes, said power mode controller thereby saving information collected by said system manager and information transferred to said memory from said network system;

a means for terminating all energy flow from said battery when said power mode controller determines said battery fails to contain a threshold energy level, said means for terminating all energy flow comprising;

a battery cut-off relay, said battery cut-off relay controlled by said power mode controller;

means for boosting energy required to actuate said battery cut-off relay when said batteries have insufficient power; and

said static random access memory also losing power upon termination of all energy flow.

7. For an energy demanding device having a variety of individualized components, a method for providing energy to said energy demanding device when input power to said device fails, said method comprising the steps of:

monitoring said input power to said energy demanding device;

delivering said input power to said energy demanding device when said input power meets preset threshold values;

switching from said input power to a secondary power source when said input power fails to meet preset threshold values;

monitoring said secondary power source;

conserving said secondary power source when said input power fails by selectively de-energizing said individualized components of said energy demanding device, said step of conserving said secondary power source comprising the steps of operating in reserve mode wherein said individualized components of said energy demanding device receive energy from said secondary power source, shifting to standby mode wherein less of said individualized components of said energy demanding device receive energy from said secondary power source, and degenerating to dormant mode when only sufficient energy remains within said secondary power source to energize a random access memory and a real time clock;

terminating energy flow from said secondary power source when said secondary power source fails to meet preset threshold values, said step of terminating energy flow further comprising the steps of;

switching a secondary cut-off relay to off position; and

boosting energy from said secondary power source when switching said secondary cut-off relay;

wherein the step of conserving said secondary power source when said input power fails by selectively energizing said individualized components of said energy demanding device further comprises the steps of;

operating in reserve mode wherein a majority of said individualized components of said energy demanding device receive energy from said secondary power source;

shifting to standby mode wherein less of said individualized components of said energy demanding device receive energy from said secondary power source; and

degenerating to dormant mode when only sufficient energy remains within said secondary power source to energize a random access memory and a real time clock.

8. For a computer system manager powered by an external power source connected to said computer system manager by a power line, said computer system manager having an internal power source and a plurality of interconnected components, said interconnected components managing a computer system operably connected thereto by processing information collected regarding the operation of said computer system and determining alert conditions from said processed information, a method of controlling operation of said computer system manager during interruptions of power supplied by said external power source, comprising the steps of:

operating said computer system manager in a first operating mode in which said components of said computer system manager are powered by said external power source;

switching said computer system manager from said first operating mode to a second operating mode in which said components are powered by said internal power source when said power received from said external power source is interrupted;

switching said computer system manager from said second operating mode to a third operating mode in which only selected ones of said components are powered by said internal power source when said computer system manager determines that an alert condition is present and transmits an alert to a remote location, said selected ones of said components powered in said third operating mode including memory, clock and external interface components.

9. A method of controlling operation of said computer system manager during interruptions of power supplied by said external power source according to claim 8 and further comprising the step of:

switching said computer system manager from said third operating mode in which said memory, clock and external interface components are powered by said internal power source to said second operating mode when said computer system manager receives an acknowledgement of said alert from said remote location.

10. A method of controlling operation of said computer system manager during interruptions of power supplied by said external power source according to claim 8 and further comprising the step of:

switching said computer system manager from either said second operating mode or said third operating mode in which said memory, clock and external interface components are powered by said internal power source to a fourth operating mode in which said memory and clock components are powered by said internal power source when said internal power source drops below a first energy level.

11. A method of controlling operations according to claim 10 and further comprising the step of switching said computer system manager from said fourth operating mode to a fifth operating mode in which said internal power source is disconnected from said computer system manager when said internal power source drops below a second energy level.

12. A method of controlling operations according to claim 11 and further comprising the step of switching said computer system manager from said second, third, fourth or fifth operating mode to said first operating mode when the supply of power from said external power source is restored.

13. A computer system manager for managing a computer system, comprising:

a system bus;

a processor subsystem for processing information and determining alerts;

a storage subsystem for storing data processed by said processor subsystem;

a computer system manager interface for operably connecting said computer system and said processor subsystem for receiving data and power from said computer system;

a communications subsystem for transmitting alerts determined by said processor subsystem to an external location;

a power source operable in a plurality of power modes, said power source including first and second power supplies;

a power mode controller for selectively directing said power source to operate in one of said plurality of power modes;

said processor subsystem, said communications subsystem, said storage subsystem, said power source, and said power mode controller interconnected by said system bus;

said plurality of power modes including a first power mode in which said power mode controller and said processor, communications and storage subsystems are powered by said first power supply, a second power mode in which said power mode controller and said processor, communication and storage subsystems are powered by said second power supply and a third power mode in which said power mode controller and said communication and storage subsystems are powered by said second power supply;

said power mode controller further comprising;

means for switching between said first power mode and said second power mode; and

means for switching between said second power mode and said third power mode.

14. A computer system manager according to claim 13 wherein said plurality of power modes further comprises a fourth power mode in which said storage subsystem is powered by said second power supply and wherein said power mode controller further comprises means for switching between either said second or third power modes and said fourth power mode.

15. A computer system manager according to claim 14 wherein said plurality of power modes further comprises a fifth power mode in which said power source is disconnected from said system bus and wherein said power mode controller further comprises means for switching between said fourth power mode and said fifth power mode.

16. A computer system manager according to claim 15 wherein said power mode controller further comprises means for switching between said first and third power modes.

17. A computer system manager according to claim 16 and further comprising means for switching from said fourth mode or said fifth modes to said first mode.