CN2393263Y - Switch power-supply with UPS functions - Google Patents
Switch power-supply with UPS functions Download PDFInfo
- Publication number
- CN2393263Y CN2393263Y CN 99241455 CN99241455U CN2393263Y CN 2393263 Y CN2393263 Y CN 2393263Y CN 99241455 CN99241455 CN 99241455 CN 99241455 U CN99241455 U CN 99241455U CN 2393263 Y CN2393263 Y CN 2393263Y
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- CN
- China
- Prior art keywords
- converter
- voltage
- power supply
- ups
- supply
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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- Power Sources (AREA)
- Dc-Dc Converters (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model provides a switch power-supply with UPS functions. The switch power-supply is provide with an AC/DC converter and a voltage reducing DC/DC converter connected to the output end of the AC/DC converter; the input end of the voltage reducing DC/DC converter is connected with a voltage increasing DC/DC converter in parallel through a diode; the input end of the voltage increasing DC/DC converter is connected with an accumulator. The utility model is especially suitable for various communication terminal products, small work controlling systems, etc. based on a computer system.
Description
The utility model relates to Switching Power Supply and the ups power in the electric equipment.
Switching Power Supply is widely used in department of computer science and unifies in other electrical equipment as fundamental power supply.Constituted by an AC/DC converter and a DC/DC converter.Its task is earlier the power frequency electricity of external power source (as civil power) to be converted to direct current, direct current to be transformed into the required DC voltage/current of computer again.For guaranteeing to work on a period of time to preserve data information at civil power sudden power computer-chronograph, present way is to ups power of computer peripheral equipment.When civil power cuts off the power supply, commentaries on classics converts the direct current of storage battery to AC input that alternating current is delivered to Switching Power Supply by the storage battery of UPS through a DC/AC change-over circuit, makes Switching Power Supply maintain electricity condition and keep computer to work on to have put until the electric weight of the storage battery of ups power.It is that the DC/AC conversion is complicated that this direct current with storage battery converts the deficiency of being defeated by Switching Power Supply behind the alternating current, carrying out the working method of AC-DC-DC conversion by Switching Power Supply again to, inefficiency, required device is many, volume is big, makes that UPS is difficult to be made as one with electrical appliance.In addition, in order to satisfy computer system to the power supply requirement of switching time, its switching mode must adopt online switching mode, and the power supply of electrical appliance is made of two-step serial, its reliability decrease, cost up.
The purpose of this utility model is intended to overcome the above-mentioned shortcoming of prior art, and a kind of high efficiency small size, the highly reliable Switching Power Supply with UPS function are provided.
Originally the Switching Power Supply that has the UPS function has an AC/DC transducer and a voltage-dropping type DC/DC converter that is connected to the AC/DC converter output end, also by a diode and be connected with a step-up DC/DC converter, be connected to a storage battery at the input of this voltage-dropping type DC/DC converter at the input of this step-up DC/DC converter.
Operation principle of the present utility model is as follows:
Under civil power normal power supply situation, the AC/DC transducer of Switching Power Supply is defeated by voltage-dropping type DC/DC converter after the power frequency electricity is converted to direct current, exports after step-down is handled and uses for electrical appliance.This moment, diode was in cut-off state, and step-up DC/DC converter is in hot stand-by duty.When mains failure, diode current flow, the work of step-up DC/DC converter is boosted the direct current of storage battery and is kept its operate as normal after diode is defeated by voltage-dropping type DC/DC converter, thereby realizes the UPS function.Because the input of voltage-dropping type DC/DC converter is equipped with an electric capacity (prior art), so be zero switching transit time.Promptly realized the high efficiency performance of the mode that works online in the mode of working offline.
Connect a loop control logic of judging the power frequency electric fault still can for step-up DC/DC converter, utilize this control loop to start or stop the operating mode of step-up DC/DC converter.Also can connect each external control signal, realize opening, stop control as PC or the next signal of CPU.
As mentioned above, the utility model has got around the working method of original DC/AC-AC/DC-DC/DC directly to carry out the UPS working method of DC/DC-DC/DC, has possessed efficient, small size, advantage in light weight, highly reliable.Can be directly be arranged in the computer with the existing conventional Switching Power Supply and allow computer take leave of the epoch of external UPS.Be specially adapted to based on all kinds of communicating terminal products of computer system, small-sized industrial control system etc.
Provide embodiment of the present utility model below in conjunction with accompanying drawing.
Fig. 1 is a theory diagram of the present utility model
Fig. 2 is the electrical block diagram of the step-up DC/DC converter of present embodiment.
Referring to Fig. 1～2, AC/DC transducer A
1With voltage-dropping type DC/DC converter A
3Continuing to use original ordinary tap power supply constitutes.Step-up DC/DC converter A
2By a diode D
7And be connected in voltage-dropping type DC/DC converter A
3Input.Storage battery B can optionally be equipped with.As selecting the VR battery for use, can use prior art it is carried out the floating charge processing.Step-up DC/DC converter A
2Formation referring to Fig. 2, comprising: by U
1And the PWM that peripheral components constitutes modulates, control circuit, U
1Can select TL494 or other like product for use, it determines the pulse duration of its 9 pin, the output of 10 pin according to feedback signal.J
1, J
2, T
1Constitute push-pull converter.D
1, D
2, Z
1Constitute the spike absorption circuit.High-frequency impulse is by T
1After boosting, footpath D
3-D
6Carry out high-frequency rectification.L
1, C
7Constitute the DC filter circuit.R
18, RP
1, R
17, C
7Constitute the Voltage Feedback sampling loop, when guaranteeing that cell voltage or load change to some extent, output DC ± 5% with interior variation.Direct voltage footpath P
3Output.D
7Be the isolating switch pipe.When normal power supply, the normal voltage of its AC/DC port is between+240～300V, and it is to be lower than above-mentioned value+235V that this step-up DC/DC converter can be set output voltage, so by D
7Characteristic know: when normal power supply, this step-up DC/DC converter is not to A
3Feed.R
20Constitute the foundation load of this step-up DC/DC converter.Certainly, also can adopt other version to constitute step-up DC/DC converter.
For the fault of judging the power frequency electricity to start or stop step-up DC/DC converter A
2Work can be given A
2Connect a loop control logic A who judges the power frequency electric fault
4A
4In the present embodiment by U
2: A, U
2: basic R-S trigger, O that B constitutes
2, D
3The power failure detector that constitutes constitutes.When entering malfunction, available timer or external TTL signal (the full isolation) carry out closing control.Control signal can be by P
6The interface input.In addition, U among the figure
2: the indication of C formation state.PWM closes, opens by N
1Finish, all the other are controlled by the R-S trigger.
Claims (2)
1. Switching Power Supply with UPS function, have an AC/DC transducer and a voltage-dropping type DC/DC converter that is connected to the AC/DC converter output end, also by a diode and be connected with a step-up DC/DC converter, be connected to a storage battery at the input of this voltage-dropping type DC/DC converter at the input of this step-up DC/DC converter.
2. the Switching Power Supply with UPS function as claimed in claim 1 is characterized in that described step-up DC/DC converter also is connected to a loop control logic of judging the power frequency electric fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99241455 CN2393263Y (en) | 1999-11-03 | 1999-11-03 | Switch power-supply with UPS functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99241455 CN2393263Y (en) | 1999-11-03 | 1999-11-03 | Switch power-supply with UPS functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2393263Y true CN2393263Y (en) | 2000-08-23 |
Family
ID=34028312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99241455 Expired - Fee Related CN2393263Y (en) | 1999-11-03 | 1999-11-03 | Switch power-supply with UPS functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2393263Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101075751B (en) * | 2006-05-16 | 2010-04-21 | 株式会社理光 | Power supply device, method thereof, and image forming device |
| CN107947184A (en) * | 2017-12-25 | 2018-04-20 | 国网辽宁省电力有限公司沈阳供电公司 | Power distribution network distributed flexible pressure regulation topological structure based on AC AC converters |
-
1999
- 1999-11-03 CN CN 99241455 patent/CN2393263Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101075751B (en) * | 2006-05-16 | 2010-04-21 | 株式会社理光 | Power supply device, method thereof, and image forming device |
| US8253276B2 (en) | 2006-05-16 | 2012-08-28 | Ricoh Company, Ltd. | Power supply device, method thereof, and image forming device |
| CN107947184A (en) * | 2017-12-25 | 2018-04-20 | 国网辽宁省电力有限公司沈阳供电公司 | Power distribution network distributed flexible pressure regulation topological structure based on AC AC converters |
| CN107947184B (en) * | 2017-12-25 | 2024-02-02 | 国网辽宁省电力有限公司沈阳供电公司 | Distributed flexible voltage regulation topological structure of power distribution network based on AC-AC converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |