WO2003075139A1 - Uninterruptible power supply apparatus for computer system - Google Patents

Uninterruptible power supply apparatus for computer system Download PDF

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Publication number
WO2003075139A1
WO2003075139A1 PCT/KR2002/000427 KR0200427W WO03075139A1 WO 2003075139 A1 WO2003075139 A1 WO 2003075139A1 KR 0200427 W KR0200427 W KR 0200427W WO 03075139 A1 WO03075139 A1 WO 03075139A1
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
converter
battery
rectifier
supply apparatus
Prior art date
Application number
PCT/KR2002/000427
Other languages
French (fr)
Inventor
Jae Seung Park
Byung Soo Choi
Original Assignee
Power Bank Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Power Bank Co., Ltd. filed Critical Power Bank Co., Ltd.
Priority to AU2002239117A priority Critical patent/AU2002239117A1/en
Publication of WO2003075139A1 publication Critical patent/WO2003075139A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/263—Arrangements for using multiple switchable power supplies, e.g. battery and AC
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads

Definitions

  • the present utility model relates to an uninterruptible power supply apparatus for a computer system, and more specifically to an uninterruptible power supply apparatus for a computer system for initiating power supply by a battery at the time of a power failure.
  • a conventional uninterruptible power supply apparatus for a computer system has been used for automatically and stably regulating a voltage and a frequency of the system to supply a constant power for a predetermined to the system which has a fluctuating voltage and frequency at the time of power failure, there by avoiding damage of data in the system.
  • the uninterruptible power supply apparatus supplies an alternating power for operating the computer and charges its battery at a normal time in order to continuously supply the constant power at the time of the power failure. In most of uninterruptible power supply apparatuses, the power supply is maintained for about 10 to 15 minutes after the power failure occurs.
  • the typical uninterruptible power supply apparatus for a computer system is illustrated in Fig. 1.
  • the uninterruptible power supply apparatus comprises a rectifier 200 for rectifying an alternating power source, a first converter 300 for generating an alternating output by switching an output of the rectifier 200 with a switching device, a plurality of rectifying and smoothing circuits 400 which are associated with plural windings constituting a transformer in the first converter 300, respectively, a power failure monitor circuit 500, a relay 600 which is switched at the time of a power failure detected by the power failure monitor circuit, a battery 900 having a charging circuit 800, and a second converter 700 for converting the power supplied by the battery 900 into an alternating power in order to replace the output power of the rectifier.
  • the power failure monitor circuit 500 determines that the voltage of the power supplier is abnormally dropped, which is considered 'a power failure.' If a power failure occurs, the relay 600 switches its contact points, so that the voltage of the battery can be supplied for power supply. By doing so, the power supply can be switched from an alternating power to the power of the battery.
  • the switching time that is, a time taken to switch the contact points of the relay is at least several tens of milliseconds. During the switching time, the power is unstable and a chattering occurs, so that the data in the computer can be damaged.
  • the apparatus in the conventional uninterruptible power supply apparatus, it is necessary for the apparatus to comprise a high reliable power failure monitor circuit 500 and a high price relay 600 in order to reduce the switching time and the chattering, as described above. Therefore, cost for manufacturing the conventional uninterruptible power supply apparatus becomes high.
  • an object of the present utility model is to provide an uninterruptible power supply apparatus for a computer system capable of minimizing the switching time without the power failure monitor circuit and the relay.
  • the present utility model provides an uninterruptible power supply apparatus which comprises a first converter connected to a rectifier to an alternating power supply and having a transformer having plural secondary windings, a switching device, and a second converter for raising a voltage of a battery which is repeatedly charged by a charging circuit, thereby supplying the voltage at the time of the power failure, and further comprises a silicon rectifier which is connected between the second converter at the side of the battery and the rectifier.
  • the battery 9 can start power supply at the time of the power failure without any additional power failure monitor circuit and any high-price relay, it is possible to greatly reduce cost for manufacturing, and since the construction is very simplified, it is possible to reduce rate of malfunction.
  • Fig. 1 is a schematic perspective view illustrating a conventional uninterruptible power supply apparatus
  • Fig. 2 is a circuit diagram illustrating an uninterruptible power supply apparatus according to an embodiment of the present utility model
  • Fig. 3 is a circuit diagram illustrating an uninterruptible power supply apparatus according to another embodiment of the present utility model.
  • the uninterruptible power supply apparatus comprises a rectifier 1 for rectifying an alternating power source, a first converter 4 for generating an alternating output by switching an output of the rectifier 1 with a switching device 3, a plurality of rectifying and smoothing circuits 7 which are associated with plural windings constituting a transformer 6 in the first converter 4, respectively, a battery 9 having a charging circuit 8, and a second converter 5 for converting an output of the battery 9 into an alternating output, and furthermore comprises a silicon rectifier 2 which is connected to the output of the second converter 5 and the output of the rectifier 1.
  • the rectifier 1 rectifies the alternating power and then outputs a half-wave power.
  • the half-wave power flows along the primary windings of the transformer 6 in a predetermined frequency by the switching device 3 in the first converter 4.
  • the voltage is induced in accordance with the winding ratios of the associated windings of the transformer and then rectified and smoothed by the associated rectifying and smoothing circuit 7.
  • the output from the rectifying and smoothing circuit 7 may have various levels of voltages, for example, 5N, -5V, 12V, +12N, +3.3V, etc., which are supplied to various parts of the computer for marinating optimal operating configuration.
  • the uninterruptible power supply apparatus immediately utilizes the power charged in the battery 9 without any additional power failure monitor circuit, so that it is possible to avoid instability of operation of the system and damage of data in the system.
  • the output voltage of the rectifier 1 first starts to drop.
  • the second converter 5 is immediately driven at the time that the output voltage drops by 0.7N, that is, a forward drop voltage of the silicon rectifier 2, so that the power can be supplied in a state that its output voltage is higher than the output voltage of the rectifier 1.
  • the output of the battery 9 is converted into a half-wave output by the second converter 5 and then induces a predetermined voltages at the second windings of the transformer 6 of the first converter 4 in the same state as the previous state in which the power supply is maintained by the alternating voltage applied by the first converter 4.
  • the present utility model is able to solve all the problems involved in blocked-out power supply in a short time due to the switching time of the conventional one. Furthermore, in the present utility model utilizing the characteristics of the silicon rectifier 2 without any power failure monitor circuit, in the normal time, the silicon rectifier 2 is backwardly driven to prevent the battery 9 from supplying power, and at the time of the power failure, the silicon rectifier 2 is forwardly driven to enable the battery 9 to supply power. Therefore, it is unnecessary to require any additional power failure monitor circuit and high-price relay.
  • FIG. 3 an uninterruptible power supply apparatus according to another embodiment of the present utility model is illustrated.
  • a voltage sensing portion 11 in a microcomputer 10 is connected to one of secondary windings of the first converter 4 to start operation of the first converter 4 and the second converter 5.
  • switching devices 3, 3' of the first converter 4 and the second converter 5 are connected to two second output portions 12, respectively.
  • the microcomputer can rapidly detect the power failure and then the switching device 3' of the second converter 5 are allowed to be driven, so that it is possible to carry out the power failure monitoring more rapidly.
  • the second converter is stopped in the normal time, so that it is possible to reduce power consumption.
  • the present utility model is easily adaptable for power supply apparatus of a personal computer.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

The present utility model relates to an uninterruptible power supply apparatus for a computer system in which a battery is started at the time of power failure. In order to minimize the switching time and implement an uninterruptible power supply without the power failure monitor circuit and the relay, the present utility model is to provide an uninterruptible power supply apparatus which comprises a first converter connected to a rectifier of an alternating power supply and having a transformer having plural secondary windings, a switching device, and a second converter for raising a voltage of a battery which is repeatedly charged by a charging circuit, thereby supplying the voltage at the time of the power failure, and further comprises a silicon rectifier which is connected between the second converter at the side of the battery and the rectifier. By doing so, according to the present utility model, since the battery is allowed to immediately start the power supply at the time of the power failure, it is possible to completely avoid erroneous operations. Therefore, it is possible to further stably supply power. Since the construction is very simplified, it is possible to greatly reduce cost for manufacturing and rate of malfunction.

Description

UNINTERRUPTIBLE POWER SUPPLY APPARATUS FOR COMPUTER SYSTEM
TECHNICAL FIELD
The present utility model relates to an uninterruptible power supply apparatus for a computer system, and more specifically to an uninterruptible power supply apparatus for a computer system for initiating power supply by a battery at the time of a power failure.
BACKGROUND ART
As well known, a conventional uninterruptible power supply apparatus for a computer system has been used for automatically and stably regulating a voltage and a frequency of the system to supply a constant power for a predetermined to the system which has a fluctuating voltage and frequency at the time of power failure, there by avoiding damage of data in the system. The uninterruptible power supply apparatus supplies an alternating power for operating the computer and charges its battery at a normal time in order to continuously supply the constant power at the time of the power failure. In most of uninterruptible power supply apparatuses, the power supply is maintained for about 10 to 15 minutes after the power failure occurs. The typical uninterruptible power supply apparatus for a computer system is illustrated in Fig. 1.
As shown in Fig. 1, the uninterruptible power supply apparatus comprises a rectifier 200 for rectifying an alternating power source, a first converter 300 for generating an alternating output by switching an output of the rectifier 200 with a switching device, a plurality of rectifying and smoothing circuits 400 which are associated with plural windings constituting a transformer in the first converter 300, respectively, a power failure monitor circuit 500, a relay 600 which is switched at the time of a power failure detected by the power failure monitor circuit, a battery 900 having a charging circuit 800, and a second converter 700 for converting the power supplied by the battery 900 into an alternating power in order to replace the output power of the rectifier.
In the uninterruptible power supply apparatus, the power failure monitor circuit 500 determines that the voltage of the power supplier is abnormally dropped, which is considered 'a power failure.' If a power failure occurs, the relay 600 switches its contact points, so that the voltage of the battery can be supplied for power supply. By doing so, the power supply can be switched from an alternating power to the power of the battery. However, in the conventional uninterruptible power supply apparatus, there are some problems. The switching time, that is, a time taken to switch the contact points of the relay is at least several tens of milliseconds. During the switching time, the power is unstable and a chattering occurs, so that the data in the computer can be damaged.
On the other hand, in the conventional uninterruptible power supply apparatus, it is necessary for the apparatus to comprise a high reliable power failure monitor circuit 500 and a high price relay 600 in order to reduce the switching time and the chattering, as described above. Therefore, cost for manufacturing the conventional uninterruptible power supply apparatus becomes high.
DISCLOUSRE OF UTILITY MODEL Therefore, in order to solve the aforementioned problems, an object of the present utility model is to provide an uninterruptible power supply apparatus for a computer system capable of minimizing the switching time without the power failure monitor circuit and the relay. In order to accomplish the above objects, the present utility model provides an uninterruptible power supply apparatus which comprises a first converter connected to a rectifier to an alternating power supply and having a transformer having plural secondary windings, a switching device, and a second converter for raising a voltage of a battery which is repeatedly charged by a charging circuit, thereby supplying the voltage at the time of the power failure, and further comprises a silicon rectifier which is connected between the second converter at the side of the battery and the rectifier. By doing so, according to the present utility model, since the battery is allowed to immediately start power supply at the time of the power failure, it is possible to completely avoid erroneous operations. Therefore, it is possible to further stably supply power. Since the construction is very simplified, it is possible to greatly reduce cost for manufacturing and rate of malfunction.
According to the present utility model, since the battery 9 can start power supply at the time of the power failure without any additional power failure monitor circuit and any high-price relay, it is possible to greatly reduce cost for manufacturing, and since the construction is very simplified, it is possible to reduce rate of malfunction.
Moreover, according to the present utility model, since the switching time taken for converting the power supply with the battery 9 is more reduced by several tens of milliseconds to several tens of micro-seconds than that of the conventional one, it is possible to further stably operate the computer system regardless of the power failure. BRIEF DESCRIPTION OF DRAWINGS
The above and other objects, advantages and features of the present utility model will become apparent from the following description of preferred embodiments with reference to the accompanying drawings, in which:
Fig. 1 is a schematic perspective view illustrating a conventional uninterruptible power supply apparatus;
Fig. 2 is a circuit diagram illustrating an uninterruptible power supply apparatus according to an embodiment of the present utility model; and Fig. 3 is a circuit diagram illustrating an uninterruptible power supply apparatus according to another embodiment of the present utility model.
DETAILED DESCRIPTION OF THE PERFERRED EMGODIMENTS
Now, the present utility model will be described in detail with reference to the appended drawings.
Fig. 2 schematically illustrates the whole construction of an uninterruptible power supply apparatus according to the present utility model. As shown Fig. 2, the uninterruptible power supply apparatus comprises a rectifier 1 for rectifying an alternating power source, a first converter 4 for generating an alternating output by switching an output of the rectifier 1 with a switching device 3, a plurality of rectifying and smoothing circuits 7 which are associated with plural windings constituting a transformer 6 in the first converter 4, respectively, a battery 9 having a charging circuit 8, and a second converter 5 for converting an output of the battery 9 into an alternating output, and furthermore comprises a silicon rectifier 2 which is connected to the output of the second converter 5 and the output of the rectifier 1.
According to this construction, in the normal time, the rectifier 1 rectifies the alternating power and then outputs a half-wave power. The half-wave power flows along the primary windings of the transformer 6 in a predetermined frequency by the switching device 3 in the first converter 4. At each of the secondary windings of the transformer 6, the voltage is induced in accordance with the winding ratios of the associated windings of the transformer and then rectified and smoothed by the associated rectifying and smoothing circuit 7. The output from the rectifying and smoothing circuit 7 may have various levels of voltages, for example, 5N, -5V, 12V, +12N, +3.3V, etc., which are supplied to various parts of the computer for marinating optimal operating configuration.
However, there are some cases that the power supply is blocked out due to a power failure, a user's careless unplugging, or a defect of plug connection. In these cases, the uninterruptible power supply apparatus according to the present utility model immediately utilizes the power charged in the battery 9 without any additional power failure monitor circuit, so that it is possible to avoid instability of operation of the system and damage of data in the system.
In the uninterruptible power supply apparatus according to the present utility model, when the voltage drop occurs due to the power failure, the output voltage of the rectifier 1 first starts to drop. The second converter 5 is immediately driven at the time that the output voltage drops by 0.7N, that is, a forward drop voltage of the silicon rectifier 2, so that the power can be supplied in a state that its output voltage is higher than the output voltage of the rectifier 1. By doing so, the output of the battery 9 is converted into a half-wave output by the second converter 5 and then induces a predetermined voltages at the second windings of the transformer 6 of the first converter 4 in the same state as the previous state in which the power supply is maintained by the alternating voltage applied by the first converter 4. Therefore, it is possible to output the various levels of voltages required for the operation of the computer system, thereby facilitating the normal operation of the system. By doing so, even though the alternating power supply is blocked out, in the present utility model, the power supply can be immediately recovered by the battery 9 to maintain the normal operation of the computer system in the different way from the conventional one which utilizes the power failure monitor circuit and the relay. Therefore, it is possible to avoid damage of data and ensure stable operation of the computer system.
In particular, the present utility model is able to solve all the problems involved in blocked-out power supply in a short time due to the switching time of the conventional one. Furthermore, in the present utility model utilizing the characteristics of the silicon rectifier 2 without any power failure monitor circuit, in the normal time, the silicon rectifier 2 is backwardly driven to prevent the battery 9 from supplying power, and at the time of the power failure, the silicon rectifier 2 is forwardly driven to enable the battery 9 to supply power. Therefore, it is unnecessary to require any additional power failure monitor circuit and high-price relay.
Next, referring to Fig. 3, an uninterruptible power supply apparatus according to another embodiment of the present utility model is illustrated. As shown in Fig. 3, a voltage sensing portion 11 in a microcomputer 10 is connected to one of secondary windings of the first converter 4 to start operation of the first converter 4 and the second converter 5. In addition, switching devices 3, 3' of the first converter 4 and the second converter 5 are connected to two second output portions 12, respectively. By doing so, the microcomputer can rapidly detect the power failure and then the switching device 3' of the second converter 5 are allowed to be driven, so that it is possible to carry out the power failure monitoring more rapidly. Furthermore, the second converter is stopped in the normal time, so that it is possible to reduce power consumption. In this construction, according to the present utility model, it is possible to ensure a rapid and stable power supply by using the battery 9 at the time of the power failure.
In this state, when the alternating power supply restarts, the output voltage of the rectifier 1 is raised by the alternating power supplier and the rising voltage is at least 0.7V. Therefore, the silicon rectifier is turned off, so that the power supply by the battery 9 and the second converter 5 is blocked out. And thus, the normal power supply is recovered by the alternating power supplier
The preferred embodiments described above are not limiting the scope of the present utility model, and the present utility model may further comprise modifications that can be made by the skilled in the art without departing from the spirit of the present utility model and within the scope of the claims.
INDUSTRIAL APPLICABILITY
The present utility model is easily adaptable for power supply apparatus of a personal computer.

Claims

CLAIMS What is claimed is
1. An interruptible power supply apparatus for a computer system, comprising a rectifier 1 for rectifying an alternating power source; a first converter 4 for generating an alternating output by switching an output of said rectifier 1 with a switching device 3; a plurality of rectifying and smoothing circuits 7, each of the rectifying and smoothing circuits being associated with each of plural windings constituting a transformer 6 in said first converter 4; a battery 9 having a charging circuit 8; and a second converter 5 for converting an output of said battery 9 to an alternating output, wherein, a silicon rectifier 2 is connected to the output of said second converter 5 and the output of said rectifier 1.
2. An interruptible power supply apparatus according to claim 1, wherein a voltage sensing portion 11 in a microcomputer 10 is connected to one of secondary windings of said first converter 4 to start operation of said first converter 4 and said second converter 5; and wherein switching devices 3, 3' of said first converter 4 and said second converter 5 are connected to two second output portions 12, respectively.
PCT/KR2002/000427 2002-03-06 2002-03-12 Uninterruptible power supply apparatus for computer system WO2003075139A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002239117A AU2002239117A1 (en) 2002-03-06 2002-03-12 Uninterruptible power supply apparatus for computer system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2020020006493U KR200276819Y1 (en) 2002-03-06 2002-03-06 Uninterruptible Power Supply Apparatus for Computer System
KR2002/6493U 2002-03-06

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WO2003075139A1 true WO2003075139A1 (en) 2003-09-12

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AU (1) AU2002239117A1 (en)
WO (1) WO2003075139A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7386457B2 (en) * 2001-03-27 2008-06-10 Pitney Bowes Inc. Messaging services for the visually impaired

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012148028A1 (en) * 2011-04-28 2012-11-01 Im Jae Yong Apparatus for charging battery

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0651871A (en) * 1992-07-28 1994-02-25 Toshiba Corp Ups and computer system provided with the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0651871A (en) * 1992-07-28 1994-02-25 Toshiba Corp Ups and computer system provided with the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7386457B2 (en) * 2001-03-27 2008-06-10 Pitney Bowes Inc. Messaging services for the visually impaired

Also Published As

Publication number Publication date
AU2002239117A1 (en) 2003-09-16
KR200276819Y1 (en) 2002-05-25

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