CN202282637U - Smooth power supply cell switching circuit - Google Patents
Smooth power supply cell switching circuit Download PDFInfo
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- CN202282637U CN202282637U CN 201120250021 CN201120250021U CN202282637U CN 202282637 U CN202282637 U CN 202282637U CN 201120250021 CN201120250021 CN 201120250021 CN 201120250021 U CN201120250021 U CN 201120250021U CN 202282637 U CN202282637 U CN 202282637U
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Abstract
The utility model provides a smooth power supply cell switching circuit, comprising at least two power supply switching branches and a power supply monitoring control circuit and a DC-DC power supply respectively in connection with each of the switching branches; each switching branch is composed of a stand-by power supply, an auxiliary switch circuit and a main switch switching circuit; the auxiliary switch circuit is in parallel with the main switch switching circuit. According to the utility model, the auxiliary switch circuit is provided in the power supply cell switching circuit and the switching between two power supplies is separated by employing diodes, which can avoid large current charging from a high voltage power supply to a low voltage power supply. Meanwhile the open time of an MOS has 2mS time-delay and two auxiliary switches are overlapped for about 2mS, which can not cause the fall off of output voltage and ensures no output interruption so as to ensure ongoing power supply of backward stages.
Description
Technical field
The utility model relates to the circuit engineering field, relates in particular to a kind of level and smooth power-supply battery commutation circuit.
Background technology
At present; Lung ventilator/the Anesthesia machine etc. that is applied in medical treatment has power-supply battery commutation circuit in the highly reliable device; As shown in Figure 1; Be that switch in three tunnel sources, comprise first branch road, second branch road, the 3rd branch road and the power supply monitoring control circuit and the DC-DC power supply that link to each other with first branch road, second branch road and the 3rd branch road respectively; Wherein, first route AC-DC power supply and switch switching circuit are formed, and second route reserve battery 1 formed with switch switching circuit, and the 3rd route reserve battery 2 formed with switch switching circuit.Switch switching circuit can be circuit breaker, and is as shown in Figure 2, perhaps as shown in Figure 3, is made up of metal-oxide-semiconductor and resistance.
But, above-mentioned many battery backup system, switch the risk of design below the existence:
1) if adopt intermittently and switch, because machinery, switching time is long to be had intermittently, causes the output voltage drop, and system restarts.
2) as making seamless overlapping switching, low battery charge or AC/DC output directly charge the battery to voltage can to make the high battery of voltage, and immediate current is out of control, and electric current is very big.
3) if do to isolate to come seamless switching with diode, because the pressure drop of diode, when the powered battery operate as normal, loss is very big, can't accomplish high efficiency.
The utility model content
The purpose of the utility model is to provide a kind of level and smooth power-supply battery commutation circuit, to solve the high reliability that the medical device power supply switches.
The utility model purpose realizes through following technical scheme.
A kind of level and smooth power-supply battery commutation circuit; Comprise: two-way source handoff leg at least; And power supply monitoring control circuit that links to each other with each handoff leg respectively and DC-DC power supply; Said handoff leg is made up of stand-by power supply, auxiliary switching circuit and main switch commutation circuit, and said auxiliary switching circuit and main switch circuit are in parallel.
Preferably; Said auxiliary switching circuit comprises: first diode, the 3rd metal-oxide-semiconductor, said main switch circuit comprise first metal-oxide-semiconductor, second metal-oxide-semiconductor, first resistance, second resistance, the 3rd resistance and the 4th resistance, and stand-by power supply connects the drain electrode of first metal-oxide-semiconductor; The source electrode of first metal-oxide-semiconductor links to each other with the source electrode of second metal-oxide-semiconductor; The grid of first metal-oxide-semiconductor connects the main switch drive end through first resistance, and the grid of second metal-oxide-semiconductor connects the auxiliary switch drive end through the 4th resistance, and second resistance links to each other with the grid of first metal-oxide-semiconductor with the 3rd resistance series connection back one end; The other end links to each other with the grid of second metal-oxide-semiconductor; The anode of first diode connects the stand-by power supply input, and its negative electrode links to each other with the drain electrode of the 3rd metal-oxide-semiconductor, and the source electrode of the 3rd metal-oxide-semiconductor connects the DC-DC power supply; The grid of the 3rd metal-oxide-semiconductor connects the auxiliary switch drive end, and second resistance links to each other with the source electrode of first metal-oxide-semiconductor and second metal-oxide-semiconductor with the mid point of the 3rd resistance.
Preferably, also comprise the 5th resistance, said the 5th resistance is connected in parallel between the source electrode and grid of the 3rd metal-oxide-semiconductor.
Preferably; Said auxiliary switching circuit comprises: first diode, second diode, said main switch circuit comprise first metal-oxide-semiconductor, second metal-oxide-semiconductor, first resistance, second resistance, the 3rd resistance and the 4th resistance, and stand-by power supply connects the drain electrode of first metal-oxide-semiconductor; The source electrode of first metal-oxide-semiconductor links to each other with the source electrode of second metal-oxide-semiconductor; The grid of first metal-oxide-semiconductor connects the auxiliary switch drive end through first resistance, and the grid of second metal-oxide-semiconductor connects the main switch drive end through the 4th resistance, and first diode is connected in parallel between the source electrode and drain electrode of first metal-oxide-semiconductor; Second diode is connected in parallel between the source electrode and drain electrode of second metal-oxide-semiconductor; Second resistance links to each other with the grid of first metal-oxide-semiconductor with the 3rd resistance series connection back one end, and the other end links to each other with the grid of second metal-oxide-semiconductor, and second resistance links to each other with the source electrode of first metal-oxide-semiconductor and second metal-oxide-semiconductor with the mid point of the 3rd resistance.
The utility model embodiment compared with prior art; Beneficial effect is: the utility model is through increasing by an auxiliary switching circuit in the power-supply battery commutation circuit; Diode-isolated is used in switching between two sources, can not cause high-tension source to dash to the big electric current in the source of low-voltage.Consider the service time of MOS simultaneously, the time-delay of 2mS is arranged, two auxiliary switches have the 2mS left and right sides overlapping, can not cause falling of output voltage, guarantee the interruption of output nothing, make back level power supply uninterruptedly.
Description of drawings
Fig. 1 is existing power-supply battery commutation circuit theory diagram;
Fig. 2, Fig. 3 are existing power-supply battery commutation circuit circuit diagrams;
Fig. 4 is the utility model power-supply battery commutation circuit theory diagram;
Fig. 5 is the utility model first embodiment circuit diagram;
Fig. 6 is the utility model second embodiment circuit diagram;
Fig. 7 is the utility model circuit timing diagram.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Seeing also shown in Figure 4ly, is that switch in three tunnel sources, comprises first branch road, second branch road, the 3rd branch road and the power supply monitoring control circuit and the DC-DC power supply that link to each other with first branch road, second branch road and the 3rd branch road respectively; Wherein, First route AC-DC power supply, auxiliary switching circuit and main switch commutation circuit are formed; Second route reserve battery 1, auxiliary switching circuit and main switch commutation circuit are formed, and the 3rd route reserve battery 2, auxiliary switching circuit and main switch commutation circuit are formed.
See also shown in Figure 5ly, the first branch road AC-DC power supply connects metal-oxide-semiconductor Q1 drain electrode, and the source electrode of metal-oxide-semiconductor Q1 links to each other with the source electrode of metal-oxide-semiconductor Q2; The grid of metal-oxide-semiconductor Q1 connects the main switch drive end through resistance R 1; The grid of metal-oxide-semiconductor 2 connects the auxiliary switch drive end through resistance R 4, and resistance R 2 links to each other with the grid of metal-oxide-semiconductor Q1 with resistance R 3 series connection backs one end, and the other end links to each other with the grid of metal-oxide-semiconductor Q2; The anode of diode D1 connects power input; Its negative electrode links to each other with the drain electrode of metal-oxide-semiconductor Q5, and the source electrode of metal-oxide-semiconductor Q5 connects the DC-DC power supply, and the grid of metal-oxide-semiconductor Q5 connects the auxiliary switch drive end; Resistance R 5 is connected in parallel between the source electrode and grid of metal-oxide-semiconductor Q5, and resistance R 2 links to each other with the source electrode of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 with the mid point of resistance R 3.And for second branch road, the 3rd branch road, its circuit connecting relation is not just being given unnecessary details with first branch road here.
See also shown in Figure 6ly, be a kind of distortion situation of Fig. 5, among the figure; The first branch road AC-DC power supply connects metal-oxide-semiconductor Q1 drain electrode, and the source electrode of metal-oxide-semiconductor Q1 links to each other with the source electrode of metal-oxide-semiconductor Q2, and the grid of metal-oxide-semiconductor Q1 meets auxiliary switch drive end SW1 through resistance R 1; The grid of metal-oxide-semiconductor 2 meets main switch drive end SW2 through resistance R 4; Diode D1 is connected in parallel between the source electrode and drain electrode of metal-oxide-semiconductor Q1, and diode D2 is connected in parallel between the source electrode and drain electrode of metal-oxide-semiconductor Q2, and resistance R 2 links to each other with the grid of metal-oxide-semiconductor Q1 with resistance R 3 series connection backs one end; The other end links to each other with the grid of metal-oxide-semiconductor Q2, and resistance R 2 links to each other with the source electrode of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 with the mid point of resistance R 3.And for second branch road, the 3rd branch road, its circuit connecting relation is not just being given unnecessary details with first branch road here.
Wherein, diode is the body diode of metal-oxide-semiconductor among Fig. 6.
Operation principle, as shown in Figure 7:
The T1 time is reserce cell one work, at this moment Q3, Q4 conducting simultaneously; Break off SW4, be the auxiliary switch work of reserce cell one this moment, i.e. the body diode conducting of Q1 conducting Q2; (T2) SW5 that closes behind the 2mS, be the auxiliary switch work of two reserce cells this moment, i.e. the body diode conducting of Q5 conducting Q6; (T3) breaks off SW3 behind the 2mS, and be the auxiliary switch work of reserce cell two this moment, (T4) SW6 that closes behind the 2mS, and promptly Q5, Q6 while turning circuit transfer reserce cell two power supplies to.The time-delay of 2mS is the switching delay time that takes into full account metal-oxide-semiconductor, comprises singly not to be limited to 2mS.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (4)
1. level and smooth power-supply battery commutation circuit; Comprise: two-way source handoff leg at least; And power supply monitoring control circuit that links to each other with each handoff leg respectively and DC-DC power supply; It is characterized in that said handoff leg is made up of stand-by power supply, auxiliary switching circuit and main switch commutation circuit, said auxiliary switching circuit and main switch circuit are in parallel.
2. level and smooth power-supply battery commutation circuit as claimed in claim 1 is characterized in that said auxiliary switching circuit comprises: first diode, the 3rd metal-oxide-semiconductor; Said main switch circuit comprises first metal-oxide-semiconductor, second metal-oxide-semiconductor, first resistance, second resistance, the 3rd resistance and the 4th resistance; Stand-by power supply connects the drain electrode of first metal-oxide-semiconductor, and the source electrode of first metal-oxide-semiconductor links to each other with the source electrode of second metal-oxide-semiconductor, and the grid of first metal-oxide-semiconductor connects the main switch drive end through first resistance; The grid of second metal-oxide-semiconductor connects the auxiliary switch drive end through the 4th resistance; Second resistance links to each other with the grid of first metal-oxide-semiconductor with the 3rd resistance series connection back one end, and the other end links to each other with the grid of second metal-oxide-semiconductor, and the anode of first diode connects the stand-by power supply input; Its negative electrode links to each other with the drain electrode of the 3rd metal-oxide-semiconductor; The source electrode of the 3rd metal-oxide-semiconductor connects the DC-DC power supply, and the grid of the 3rd metal-oxide-semiconductor connects the auxiliary switch drive end, and second resistance links to each other with the source electrode of first metal-oxide-semiconductor and second metal-oxide-semiconductor with the mid point of the 3rd resistance.
3. level and smooth power-supply battery commutation circuit as claimed in claim 2 is characterized in that, also comprises the 5th resistance, and said the 5th resistance is connected in parallel between the source electrode and grid of the 3rd metal-oxide-semiconductor.
4. level and smooth power-supply battery commutation circuit as claimed in claim 1; It is characterized in that; Said auxiliary switching circuit comprises: first diode, second diode, said main switch circuit comprise first metal-oxide-semiconductor, second metal-oxide-semiconductor, first resistance, second resistance, the 3rd resistance and the 4th resistance, and stand-by power supply connects the drain electrode of first metal-oxide-semiconductor; The source electrode of first metal-oxide-semiconductor links to each other with the source electrode of second metal-oxide-semiconductor; The grid of first metal-oxide-semiconductor connects the auxiliary switch drive end through first resistance, and the grid of second metal-oxide-semiconductor connects the main switch drive end through the 4th resistance, and first diode is connected in parallel between the source electrode and drain electrode of first metal-oxide-semiconductor; Second diode is connected in parallel between the source electrode and drain electrode of the 2nd MOS pipe; Second resistance links to each other with the grid of first metal-oxide-semiconductor with the 3rd resistance series connection back one end, and the other end links to each other with the grid of second metal-oxide-semiconductor, and second resistance links to each other with the source electrode of first metal-oxide-semiconductor and second metal-oxide-semiconductor with the mid point of the 3rd resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120250021 CN202282637U (en) | 2011-07-15 | 2011-07-15 | Smooth power supply cell switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120250021 CN202282637U (en) | 2011-07-15 | 2011-07-15 | Smooth power supply cell switching circuit |
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| CN202282637U true CN202282637U (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201120250021 Expired - Fee Related CN202282637U (en) | 2011-07-15 | 2011-07-15 | Smooth power supply cell switching circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410088A (en) * | 2014-11-28 | 2015-03-11 | 国家电网公司 | Smooth switching circuit |
| CN107516936A (en) * | 2017-09-08 | 2017-12-26 | 天津汇康医用设备有限公司 | A kind of direct current main secondary power switching circuit |
| CN107807274A (en) * | 2017-12-08 | 2018-03-16 | 成都前锋电子仪器有限责任公司 | A kind of power supply circuit for rf power measurement |
| CN108964246A (en) * | 2018-07-25 | 2018-12-07 | 郑州云海信息技术有限公司 | A kind of method for switching main and standby power supplies and system of test equipment |
| CN109075571A (en) * | 2016-04-14 | 2018-12-21 | 瑞士优北罗股份有限公司 | Power supply switch circuit |
| CN109873489A (en) * | 2019-03-04 | 2019-06-11 | 华通信安(北京)科技发展有限公司 | A kind of power-supply management system of instrument of surveying and mapping |
| CN110164354A (en) * | 2019-05-24 | 2019-08-23 | 京东方科技集团股份有限公司 | Data processing equipment and its driving method and display device based on programmable logic device |
-
2011
- 2011-07-15 CN CN 201120250021 patent/CN202282637U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410088A (en) * | 2014-11-28 | 2015-03-11 | 国家电网公司 | Smooth switching circuit |
| CN109075571A (en) * | 2016-04-14 | 2018-12-21 | 瑞士优北罗股份有限公司 | Power supply switch circuit |
| CN109075571B (en) * | 2016-04-14 | 2022-11-01 | 瑞士优北罗股份有限公司 | Power supply switching circuit |
| CN107516936A (en) * | 2017-09-08 | 2017-12-26 | 天津汇康医用设备有限公司 | A kind of direct current main secondary power switching circuit |
| CN107807274A (en) * | 2017-12-08 | 2018-03-16 | 成都前锋电子仪器有限责任公司 | A kind of power supply circuit for rf power measurement |
| CN108964246A (en) * | 2018-07-25 | 2018-12-07 | 郑州云海信息技术有限公司 | A kind of method for switching main and standby power supplies and system of test equipment |
| CN108964246B (en) * | 2018-07-25 | 2021-11-23 | 郑州云海信息技术有限公司 | Main/standby power supply switching method and system of test equipment |
| CN109873489A (en) * | 2019-03-04 | 2019-06-11 | 华通信安(北京)科技发展有限公司 | A kind of power-supply management system of instrument of surveying and mapping |
| CN109873489B (en) * | 2019-03-04 | 2021-11-05 | 华通信安(北京)科技发展有限公司 | Power management system of surveying instrument |
| CN110164354A (en) * | 2019-05-24 | 2019-08-23 | 京东方科技集团股份有限公司 | Data processing equipment and its driving method and display device based on programmable logic device |
| CN110164354B (en) * | 2019-05-24 | 2022-06-10 | 京东方科技集团股份有限公司 | Data processing device based on programmable logic device, driving method thereof and display device |
| US11455973B2 (en) | 2019-05-24 | 2022-09-27 | Beijing Boe Technology Development Co., Ltd. | Programmable logic device-based data processing apparatus and driving method therefor, and display apparatus |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20200715 |
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| CF01 | Termination of patent right due to non-payment of annual fee |