which receive the alternate power flow, the secondary
POWER SUPPLY FOR COMPUTER SYSTEM power source can function for considerably longer peri
MANAGER ods than if the entire system received power. Moreover,
once secondary power is established the ideal system CROSS REFERENCE TO RELATED 5 would continue to monitor the primary power source to APPLICATIONS determine if operating criteria returns; upon restoration This application is related to co-pending U.S. patent °f the primary power the ideal system would then reinapplication Ser. Nos. 07/720,259 entitled COMPUTER state the normal operating mode. SYSTEM MANAGER, 07/719,240 entitled INNATE The need for such a power controller also exists BUS MONITOR FOR COMPUTER SYSTEM 10 within a system manager. A system manager typically MANAGER, 07/720,258 entitled IN BAND/OUT OF interfaces with a network manager or network operatBAND ALERT DELIVERY SYSTEM FOR COM- ing system to output operational data pertaining to the PUTER SYSTEM MANAGER, and 07/719,243 enti- system and network management. The system manager, tied REMOTE CONSOLE EMULATOR FOR COM- as a data collection device, requires continual monitorPUTER SYSTEM MANAGER all of which were 15 ing of the power supply in order to maintain the data filed on even date herewith, assigned to the assignee of compiled during its cycle of operation. Further, the the present invention and hereby incorporated by refer- power supplies currently available do not meet the ence as if reproduced in their entirety. demands of such a system manager, which demands
BACKGROUND OF THE INVENTION jo mcJude Jmalysi! f P8** of 1**°TMTM* management
and predictive failure aspects of fault analysis. Each of 1. Field of the Invention these analysis require observation of the input and supThe invention relates to a power supply for a com- piy power and safety measures designed to protect the puter system, and more particularly to a power supply volatile data stored by the system manager, controller which monitors operating power of the com- a ^ 8upp]y which monitors and controls puter system and upon detection of out-of-threshold 25 ^ flow Qf ,y ^ tQ a uter QT computer supply power switches the system to battery power, system & needed. Further desired within such a power which ui turn has the ability to shut off certain non- is secondary power source, or battery backessential components of the system in order to conserve ^ Mves ^ ^ ^ ^ >s batterypower and system memory. ^ ^ ^ main retums to m 2_Descnption of Related Art 30 * ^ £^ ^ ^ or The power supply to a computer or computer system J. h carnes the responsibility of providing power usable to .., '" y ^ "6. *\ .' the computer. Because most computersVequire voltage ^tending measures would require selective operand current different from that generated and transmit- hons of cnt,cal «»»P«« components, ted by the local utility company, the computer power 35 SUMMARY OF THE INVENTION supply must convert the in-coming voltage and current . , ,. , ... to a voltage and current employable by the computer In 8 embodiment, the present invention is an itself. For instance, most utilities in the United States apparatus for delivering, monitoring and conserving produce power at 120 volts, in a 60 hertz, sinusoidal P°wer t0 M ener8y demanding device that has a variety alternating current. The computer, however, requires in 40 of individualized components. The apparatus comprises many cases, direct current at a significantly reduced at least one mPut P°wer sourc* Md a means for monivoltage level. Thus, the power supply transforms the torin8 encr«y conducted by the input power source as "utility power" into "computer power." wdl * means for delivering the energy to the energy While power supplies for computers have existed for demanding device. A secondary power source, with its as long as computers requiring the power have existed, 45 own energy monitoring means and energy delivery most power supplies heretofore known merely effectu- means further comprises the apparatus. A means is inate the proper power conversions without considerable eluded for switching from the input power delivery interaction with the computer. As a result, little if any means to the secondary power delivery means, and for monitoring of the incoming power occurred. If, the switching from the secondary power delivery means local utility experienced a "brown-out" as is common 50 back to the input power delivery means. These switchduring the summer months in hot climates, the power ing we directed by the input monitoring means. The supply merely would attempt to transmit the low qual- apparatus contains a means for conserving energy conity power to the computer. Often times, this poor power ducted by the secondary power source to the energy did not meet the manufacturer's power specifications demanding device. The energy conserving means perand either would cause the computer to discontinue 55 nuts the apparatus to operate in one of a discrete numoperation, lose data or potentially damage delicate com- ber of power intensive modes. Finally, the apparatus ponents of the system. includes a means for terminating all energy flow when Once the power level causes termination of computer the secondary monitoring means determines that energy operations all data and configurations stored within the conducted by the secondary power source fails to meet computer evaporate. Most computer systems and 60 preset threshold values.
power supply components thereof do not include a In another embodiment, the present invention is of a secondary power source for the computer when pri- method for providing energy to an energy demanding mary power either lacks the required quality or com- device that has a variety of individualized components pletely fails. Further, many of the power supplies com- when input power to the device fails. The method commonly employed within computers and computer sys- 65 prises the steps of monitoring the input power to the tems which do have some sort of battery back-up, fail to energy demanding device. The step of delivering the include life-extending control measures which increase input power to the energy demanding device when the the back-up power period. By prioritizing components input power meets preset threshold values is included