CN2102577U

CN2102577U - Non-interval power source supply device

Info

Publication number: CN2102577U
Application number: CN 91225351
Authority: CN
Inventors: 孙明; 常福茂
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-09-25
Filing date: 1991-09-25
Publication date: 1992-04-22

Abstract

The utility model relates to a non-interval power source supply device belonging to an improvement on the power sources of the existing computers. The utility model is added with the function of automatic conversion into power supply by spare batteries after the power failure of alternating current. Owing to the adoption of V-MOS elements by a converting device, converting operations can be completed in 10 milliseconds, and thereby, non-interval operation of a microcomputer is ensured. The spare batteries are provided with a charging control device, a discharge protective device, and an acoustooptic alarm device used after the power failure of alternating current.

Description

Non-interval power source supply device

The utility model belongs to directly powers to microcomputer, and the stabilized voltage supply device of long-time uninterrupted power supply function is arranged.By adopting this device can guarantee to run into mains failure in the computer operation process, can uninterruptedly work on more than one hour.

General microcomputer has a cover switching mode voltage stabilizer in the machine now.This power supply can only guarantee could work under the situation of civil power normal power supply.And the operation of well-known microcomputer is not allow external power source to interrupt, even have only 20 milliseconds of interruption durations also can cause operating mistake, loss of data.The way that addresses this problem in the past is to dispose a ups power in addition, but mostly commercially available ups power is the short time power supply at present, generally have only 15 minutes, during this period of time to continue to finish work such as data manipulation, deposit after the power failure, often feel that the time is not enough, and the ups power volume of joining in addition is bigger, and cost is also very high.

The purpose of this utility model is to provide a kind of stabilized voltage supply device that long-time uninterrupted power supply function is arranged for microcomputer.

For reaching this purpose, in this device, adopt power transformer that civil power is become low-voltage AC, by rectification, filter alternating current is transformed to direct current again, direct current is stabilized in the voltage range that presets by the adjustable integrated regulator of three ends; Other has AC and DC power supply conversion equipment, when this device detects mains failure, just can be in 10 milliseconds the battery in the engaging means, change by reserve battery and power to microcomputer.Because this device adopts the switching device of V-MOS device as AC and DC power supply conversion equipment, change-over time is fast, the conducting internal resistance is little, can guarantee the microcomputer non-stop run fully.The experimental rig that utilizes the design to make is on probation on the IBM-PC microcomputer, has reached the purpose of design.

Figure one is the electrical principle block diagram of this supply unit

Figure two, figure three are electrical schematic diagrams of this supply unit

Figure four is electrical schematic diagrams of negative supply generation device

Figure one shows the electrical principle block diagram of this supply unit, by transformer the alternating current 220V civil power is become low-voltage AC, by rectification, filter alternating current is become direct current again, exports one tunnel+12V dc source through the 12V mu balanced circuit. This device can detect AC outage by the alternating current detector, and the control AC and DC switches to the reserve battery power supply for electrical switching device in 10 milliseconds; Utilize at ordinary times battery charger to charge to reserve battery, when charging voltage reaches the 14V(saturation voltage) time, charging device can stop charging automatically. The battery protecting circuit of this device can detect the discharge voltage of battery, and when voltage is down to 10.5V, holding circuit will be closed battery feed circuit, does not damage because of overdischarge with the protection battery. The negative supply power pack because required electric current is very little, so adopts oscillating circuit to produce pulse voltage in this device, again by transformer output AC electricity, through rectification, filtering, the negative 12V of mu balanced circuit output, negative 5V power supply. Other has a cover sound-light reminding device, when the 220V alternating current cuts off the power supply, can send interrupted cry, and have a red luminotron glittering, notes in order to reminding user.

Figure two shows the electrical schematic diagram of this supply unit, the alternating current 220V power supply becomes low-voltage AC through transformer B1, through D1～D4 rectification and through C1 filtering, become low-voltage DC, through the IC1 voltage stabilizing, by adjusting the W1 resistance, the output voltage of IC1 can be preset at 12V, through C2 filtering, export one tunnel+12V dc source again. Through the IC2 voltage stabilizing, by adjusting the W2 resistance, make the IC2 output voltage be preset at 5V in addition, through C4 filtering, export one tunnel+5V dc source.

The low-voltage AC of transformer B1 output is simultaneously through D7～D10 rectification, through C5 filtering, be input to the b utmost point of BG3 through R3, W3, R4 bleeder circuit, BG3 is the PNP device, when AC outage, the b utmost point does not have high potential, and the BG3 conducting is when BG2 also conducting, just make BG4(P raceway groove V-MOS device) G electronegative potential very, the BG4 conducting is connected anode to the 12V output, reaches the purpose of uninterrupted power supply; When alternating current restored electricity, BG3b very high potential transferred to and ending, and makes very high potential of BG4G, and BG4 is by cutting off the powered battery circuit.

BG2(NPN device in this device) effect is the protection reserve battery, the puncture voltage of selecting BG1 is about 10.5V, and BG2 ends when making cell voltage reduce to 10.5V through fine tuning W4 again, and the BG4G utmost point has a high potential, D, the S utmost point end, and cut off battery powered circuit; When cell voltage reaches 10.5V BG2 conducting when above, the BG4G utmost point does not have high potential, and D, the conducting of the S utmost point recover powered battery.

IC3 effect in this device is the high-power switch device of control battery charge, the puncture voltage of selecting BG5 about 14V, fine tuning W5 again, when making battery charging voltage reach 14V, IC3 control end (1 pin) is high potential, 4 pin output no-outputs, charging stops; Cell voltage is reduced to 14V when following, and 1 pin of IC3 is electronegative potential, and 4 pin outputs have voltage output, and reserve battery is charged.D12～D15 is the rectifier diode of live part, and R9 is a charging current limiter resistance, by adjusting the resistance size of R9, the size of may command charging current.

The negative supply that figure four shows this device produces part.The input termination 12V power supply of this device, form oscillator by BG6, BG7, R12, C7 etc., be connected to BG8, BG9 output, through transformer output 20V alternating voltage, again through D17～D20 rectification, C8 filtering, become low-voltage DC, export one tunnel negative 12V power supply by the IC5 voltage stabilizing again, one tunnel negative 5V power supply is exported in the IC6 voltage stabilizing.Because now novel PC motherboard is no longer with the negative supply power supply, so this part can be used as attachment device and selects for use.

J1 in this device, IC4 etc. form interchange power failure sound, light alarm set, J1 adhesive when AC-powered, and the J1-1 normally-closed contact disconnects, and the IC4 no-voltage is not worked; J1 discharges when AC outage, and normally-closed contact is connected, and the 12V voltage that provided by battery is provided IC4, produces intermittent oscillation, by the interrupted high potential of 3 pin output, makes the luminous tube D12 and the buzzer F1 that join with 3 pin, sends interrupted sound, light alerting signal.By adjusting the resistance of W6, the length of may command cycle of oscillation.

Advantage of the present utility model, characteristics: (one) this device adopts the V-MOS device as AC and DC powered switch device, and speed is fast, can satisfy the needs of microcomputer uninterrupted power supply.(2) this device adopts the 12V reserve battery directly to the microcomputer power supply, removed to be reverse into this link of alternating current 220V, thereby the efficient height.When adopting the reserve battery identical with UPS, can be at the uninterrupted power supply that provides after the power failure more than 1～2 hour.(3) this device adopts battery charge and discharge dual-protection circuit, makes that battery is unlikely to be overcharged and overdischarge, thereby can prolong the useful life of battery greatly.

Embodiment 1: shown in figure two, adopt the series regulator power supply of Industrial Frequency Transformer B1 step-down, switching device shifter and battery charge and discharge protection device are as mentioned above.

Embodiment 2: shown in figure three, can adopt the switching mode voltage stabilizer power supply in the former microcomputer, other connects the charge and discharge protection device of AC and DC power supply conversion equipment provided by the utility model and battery.

Claims

1, a kind of supply unit of uninterrupted power supply; when reserve battery is powered; by AC and DC power supply conversion equipment reserve battery directly is connected with microcomputer; it is characterized in that AC and DC power supply conversion equipment adopts the V-MOS pipe as switching device; the output that is connected reserve battery and pressurizer is between the computer power input, and is connected with reserve battery battery charge controller and discharge protector and acousto-optic alarm set.

2,, it is characterized in that the charge circuit of reserve battery connects battery charge controller, at the discharge loop connection discharge protector of reserve battery according to the supply unit of the described uninterrupted power supply of claim 1.

3,, it is characterized in that the acousto-optic alarm set is connected with reserve battery by the normally closed contact of relay according to the supply unit of the described uninterrupted power supply of claim 1.