CN108039770A - A kind of server power supply adapter and battery powered seamless handover method and circuit - Google Patents
A kind of server power supply adapter and battery powered seamless handover method and circuit Download PDFInfo
- Publication number
- CN108039770A CN108039770A CN201810036536.7A CN201810036536A CN108039770A CN 108039770 A CN108039770 A CN 108039770A CN 201810036536 A CN201810036536 A CN 201810036536A CN 108039770 A CN108039770 A CN 108039770A
- Authority
- CN
- China
- Prior art keywords
- switch
- power supply
- power
- voltage
- control chip
- 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.)
- Pending
Links
Classifications
-
- 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
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06F1/305—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations in the event of power-supply fluctuations
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Power Engineering (AREA)
- Power Sources (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
本发明实施例提供了一种服务器电源适配器和电池供电无缝切换方法，包括，侦测电源适配器开关输入输出电压，当输入电压大于输出电压时，控制开关打开；当输入电压小于输出电压时，电源控制芯片控制开关关闭；侦测电池供电开关输入输出电压，当输入电压大于输出电压时，控制开关打开；当输入电压小于输出电压时，电源控制芯片控制开关关闭。所述电源适配器、电池供电均通过开关与负载连接，用于向服务器提供电能。本发明实施例解决了服务器传统电源适配器到电池供电切换时可能产生的电压跌落而造成的系统掉电或部分部件掉电的风险，提高了服务器的产品稳定性。本发明还提供了一种服务器电源适配器和电池供电无缝切换电路。
An embodiment of the present invention provides a method for seamless switching between a server power adapter and a battery power supply, including detecting the input and output voltages of the power adapter switch, and when the input voltage is greater than the output voltage, the control switch is turned on; when the input voltage is lower than the output voltage, The power control chip controls the switch to turn off; detects the input and output voltage of the battery power switch, and when the input voltage is greater than the output voltage, the control switch is turned on; when the input voltage is lower than the output voltage, the power control chip controls the switch to turn off. Both the power adapter and the battery power supply are connected to the load through a switch, and are used to provide power to the server. The embodiment of the present invention solves the risk of system power failure or partial component power failure caused by the voltage drop that may occur when the server is switched from the traditional power adapter to the battery power supply, and improves the product stability of the server. The invention also provides a server power adapter and battery power supply seamless switching circuit.
Description
技术领域technical field
本发明涉及服务器领域。The present invention relates to the field of servers.
背景技术Background technique
目前的服务器对于电源适配器和电池供电的设计方法为，分别使用电源控制芯片控制电源适配器电源通路和电池电源通路，使用系统时序控制芯片控制两路电源通路的开关，达到系统电源切换的目的。The current server design method for the power adapter and battery power supply is to use the power control chip to control the power adapter power path and the battery power path respectively, and use the system timing control chip to control the switch of the two power paths to achieve the purpose of system power switching.
现有利用时序控制器来控制电源适配器和电池供电切换的设计方法存在的问题是，当电源适配器电压跌落出正常的电压范围时电源控制芯片才会发出异常报警信号,时序控制器接收到报警信号后，需要经过一段时间的处理才可以发出控制信号给电池供电控制芯片。The problem with the existing design method of using the timing controller to control the switching between the power adapter and the battery power supply is that when the voltage of the power adapter drops out of the normal voltage range, the power control chip will send out an abnormal alarm signal, and the timing controller will receive the alarm signal Finally, it takes a period of processing before sending a control signal to the battery-powered control chip.
同时，电池供电控制芯片接收到控制信号后需要一段时间处理才可以将控制开关打开，这样在电源切换的过程中，系统电源输入端会出现电源真空。即在时序控制器切换电源这段时间内(大约几个毫秒)电源适配器已经无法供电同时电池控制开关没有打开无法供电，这样会导致系统电源出现较大跌落，该跌落可能导致系统异常关机或部分部件掉电，会很大程度影响服务器的稳定性。At the same time, it takes a period of time for the battery-powered control chip to process the control signal before it can turn on the control switch. In this way, during the power switching process, a power vacuum will appear at the system power input end. That is, during the period when the sequence controller switches the power supply (about a few milliseconds), the power adapter has been unable to supply power and the battery control switch is not turned on and cannot supply power. This will cause a large drop in the system power supply, which may cause the system to shut down abnormally or partially Power failure of components will greatly affect the stability of the server.
发明内容Contents of the invention
本发明要为解决服务器电源适配器与电池供电切换过程中的电压跌落影响服务器稳定性的技术问题。为此，本发明提供一种服务器电源适配器和电池供电无缝切换方法及电路，它具有解决服务器传统电源适配器到电池供电切换时可能产生的电压跌落而造成的系统掉电或部分部件掉电的风险，提高了服务器的产品稳定性优点。The present invention aims to solve the technical problem that the voltage drop during the switching process between the server power adapter and the battery power supply affects the stability of the server. To this end, the present invention provides a method and circuit for seamlessly switching between a server power adapter and a battery power supply, which has the ability to solve the system power-off or partial component power-off caused by the voltage drop that may occur when the server is switched from a traditional power adapter to a battery power supply. Risk, improve the product stability advantages of the server.
为了实现上述目的，本发明采用如下技术方案。In order to achieve the above object, the present invention adopts the following technical solutions.
一种服务器电源适配器和电池供电无缝切换方法，包括，侦测电源适配器开关输入输出电压，当输入电压大于输出电压时，控制开关打开；当输入电压小于输出电压时，电源控制芯片控制开关关闭；侦测电池供电开关输入输出电压，当输入电压大于输出电压时，控制开关打开；当输入电压小于输出电压时，电源控制芯片控制开关关闭。所述电源适配器、电池供电均通过开关与负载连接，用于向服务器提供电能。A method for seamless switching between a server power adapter and a battery power supply, including detecting the input and output voltages of a power adapter switch, and when the input voltage is greater than the output voltage, the control switch is turned on; when the input voltage is lower than the output voltage, the power control chip controls the switch to be turned off ; Detect the input and output voltage of the battery-powered switch. When the input voltage is greater than the output voltage, the control switch is turned on; when the input voltage is lower than the output voltage, the power control chip controls the switch to be turned off. Both the power adapter and the battery power supply are connected to the load through a switch, and are used to provide power to the server.
一种服务器电源适配器和电池供电无缝切换电路，包括，电源适配器供电通路及电池供电通路；电源适配器供电通路包含电源适配器供电模块、第一开关、第一控制芯片，电源适配器供电模块通过第一开关与负载连接，第一控制芯片通过侦测第一开关输入输出端电压，控制第一开关打开或关闭。电池供电通路包含电池供电模块、第二开关、第二控制芯片，电源适配器供电模块通过第二开关与负载连接，第二控制芯片通过侦测第二开关输入输出端电压，控制第二开关打开或关闭。A server power adapter and battery power supply seamless switching circuit, including a power adapter power supply path and a battery power supply path; the power adapter power supply path includes a power adapter power supply module, a first switch, and a first control chip, and the power adapter power supply module passes through the first The switch is connected to the load, and the first control chip controls the first switch to be turned on or off by detecting the voltage at the input and output ends of the first switch. The battery power supply path includes a battery power supply module, a second switch, and a second control chip. The power supply module of the power adapter is connected to the load through the second switch. The second control chip controls the second switch to open or closure.
优选的，当第一开关两端的输入电压大于输出电压时，第一控制芯片控制第一开关打开；当第一开关两端的输入电压小于输出电压时，第一控制芯片控制第一开关关闭。Preferably, when the input voltage across the first switch is greater than the output voltage, the first control chip controls the first switch to turn on; when the input voltage across the first switch is lower than the output voltage, the first control chip controls the first switch to turn off.
优选的，当第二开关两端的输入电压大于输出电压时，第二控制芯片控制第二开关打开；当第二开关两端的输入电压小于输出电压时，第二控制芯片控制第二开关关闭。Preferably, when the input voltage across the second switch is greater than the output voltage, the second control chip controls the second switch to open; when the input voltage across the second switch is lower than the output voltage, the second control chip controls the second switch to close.
本发明的有益效果：解决了服务器传统电源适配器到电池供电切换时可能产生的电压跌落而造成的系统掉电或部分部件掉电的风险，提高了服务器的产品稳定性。The beneficial effect of the present invention is to solve the risk of system power-off or power-off of some components caused by the voltage drop that may occur when the traditional power adapter of the server is switched to battery power supply, and improve the product stability of the server.
附图说明Description of drawings
图1是对比例中电源适配器供电控制线路示意图。Fig. 1 is a schematic diagram of the power supply control circuit of the power adapter in the comparative example.
图2是对比例中电池供电控制线路示意图。Fig. 2 is a schematic diagram of a battery-powered control circuit in a comparative example.
图3是对比例的系统时序控制器控制电源切换线路。Fig. 3 is a comparison example of the system sequence controller controlling the switching circuit of the power supply.
图4是实施例的连接示意图。Fig. 4 is a schematic connection diagram of the embodiment.
具体实施方式Detailed ways
下面结合附图与实施例对本发明作进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
对比例comparative example
如图1～3所示，现有服务器供电方式，分别使用电源控制芯片控制电源适配器电源通路和电池电源通路，使用系统时序控制芯片控制两路电源通路的开关，达到系统电源切换的目的。如图1所示，用电源控制芯片U1控制开关Q1，当电源适配器在时，打开Q1，用电源适配器的电源给系统供电。如图2所示，用电源控制芯片U2控制开关Q2，当电源适配器电源发生意外断电时，打开Q2，用电池(P12V_BBU)给系统供电。As shown in Figures 1 to 3, the existing server power supply method uses a power control chip to control the power supply path of the power adapter and a battery power path, and uses a system timing control chip to control the switches of the two power paths to achieve the purpose of system power switching. As shown in Figure 1, the switch Q1 is controlled by the power control chip U1. When the power adapter is on, Q1 is turned on, and the power supply of the power adapter is used to supply power to the system. As shown in Figure 2, the power control chip U2 is used to control the switch Q2. When the power adapter power supply is unexpectedly powered off, Q2 is turned on and the battery (P12V_BBU) is used to supply power to the system.
如图3所示，当电源适配器供电发生意外断电时，系统时序控制器(CPLD)接到电源适配器异常信号(AC_FAIL)后，给电池供电控制芯片U2发指令，让电池控制芯片打开控制开关Q2；同时给电源适配器控制芯片U1发指令，让电源适配器控制芯片关闭控制开关Q1，完成电源适配器与电池供电的切换动作。As shown in Figure 3, when the power supply of the power adapter is unexpectedly powered off, the system timing controller (CPLD) sends an instruction to the battery-powered control chip U2 after receiving the abnormal signal (AC_FAIL) of the power adapter, so that the battery control chip turns on the control switch Q2; at the same time, an instruction is sent to the power adapter control chip U1, so that the power adapter control chip closes the control switch Q1 to complete the switching action between the power adapter and the battery power supply.
实施例Example
一种服务器电源适配器和电池供电无缝切换方法，包括，侦测电源适配器开关输入输出电压，当输入电压大于输出电压时，控制开关打开；当输入电压小于输出电压时，电源控制芯片控制开关关闭；侦测电池供电开关输入输出电压，当输入电压大于输出电压时，控制开关打开；当输入电压小于输出电压时，电源控制芯片控制开关关闭。所述电源适配器、电池供电均通过开关与负载连接，用于向服务器提供电能。A method for seamless switching between a server power adapter and a battery power supply, including detecting the input and output voltages of a power adapter switch, and when the input voltage is greater than the output voltage, the control switch is turned on; when the input voltage is lower than the output voltage, the power control chip controls the switch to be turned off ; Detect the input and output voltage of the battery-powered switch. When the input voltage is greater than the output voltage, the control switch is turned on; when the input voltage is lower than the output voltage, the power control chip controls the switch to be turned off. Both the power adapter and the battery power supply are connected to the load through a switch, and are used to provide power to the server.
一种服务器电源适配器和电池供电无缝切换电路，包括，电源适配器供电通路及电池供电通路；电源适配器供电通路包含电源适配器供电模块PSU、第一开关Q3、第一控制芯片U3，电源适配器供电模块PSU通过第一开关Q3与负载连接，第一控制芯片U3通过侦测第一开关Q3输入输出端电压，控制第一开关Q3打开或关闭。电池供电通路包含电池供电模块BBU、第二开关Q4、第二控制芯片U4，电源适配器供电模块通过第二开关Q4与负载连接，第二控制芯片U4通过侦测第二开关Q4输入输出端电压，控制第二开关Q4打开或关闭。A server power adapter and battery power supply seamless switching circuit, including a power adapter power supply path and a battery power supply path; the power adapter power supply path includes a power adapter power supply module PSU, a first switch Q3, a first control chip U3, and a power adapter power supply module The PSU is connected to the load through the first switch Q3, and the first control chip U3 controls the first switch Q3 to be turned on or off by detecting the voltage at the input and output ends of the first switch Q3. The battery power supply path includes a battery power supply module BBU, a second switch Q4, and a second control chip U4. The power supply module of the power adapter is connected to the load through the second switch Q4. The second control chip U4 detects the voltage at the input and output terminals of the second switch Q4, Control the second switch Q4 to open or close.
在本实施例中，具体过程还包括：In this embodiment, the specific process also includes:
1.确认电源适配器供电模块PSU输出电压规格，规定电源适配器供电模块PSU电压为12V±5％(11.4V～12.6V).1. Confirm the PSU output voltage specification of the power adapter power supply module, and stipulate that the PSU voltage of the power adapter power supply module is 12V±5% (11.4V～12.6V).
2.确认电池供电模块BBU输出电压规格，规定电池供电模块BBU电压9V～11.4V,即电池供电模块BBU充满电电压为11.4V,最低电压为9V2. Confirm the BBU output voltage specification of the battery power supply module, and stipulate that the BBU voltage of the battery power supply module is 9V ~ 11.4V, that is, the fully charged voltage of the BBU of the battery power supply module is 11.4V, and the minimum voltage is 9V
3.确认系统电流选择合适的开关Q3，Q4,本实例以低端存储服务器系统电流30A为例，选择开关型号为CSD16415Q5。3. Confirm the system current and select the appropriate switch Q3, Q4. This example takes the low-end storage server system current 30A as an example, and select the switch model as CSD16415Q5.
4.选择控制芯片型号LM5050-2。4. Select the control chip model LM5050-2.
5.当电源适配器正常供电时，Q3打开，Q4关闭，系统由电源适配器供电，系统电压为12V；当出现异常时(电网掉电或电源适配器故障等)，电源适配器供电模块PSU电压迅速下降，当电源适配器电压低于11.4V时，第二控制芯片U2侦测到输入电压(电池充满电电压)大于输出电压，打开第二开关Q4，此时第一控制芯片U3侦测到输入电压(电源适配器电压)小于输出电压，关闭第一开关Q3，完成电源适配器供电模块到电池供电模块的无缝切换。5. When the power adapter supplies power normally, Q3 is turned on and Q4 is turned off. The system is powered by the power adapter, and the system voltage is 12V. When the power adapter voltage is lower than 11.4V, the second control chip U2 detects that the input voltage (battery fully charged voltage) is greater than the output voltage, and turns on the second switch Q4. At this time, the first control chip U3 detects the input voltage (power supply voltage) Adapter voltage) is less than the output voltage, turn off the first switch Q3, and complete the seamless switching from the power adapter power supply module to the battery power supply module.
本实施例与对比例相比，在电源适配器供电模块与电池供电模块切换时采用输入输出电压侦测控制切换的设计方法代替传统时序控制器控制切换的设计方法，解决了服务器传统电源适配器到电池供电切换时可能产生的电压跌落而造成的系统掉电或部分部件掉电的风险，提高了服务器的产品稳定性。Compared with the comparative example, this embodiment adopts the design method of input and output voltage detection control switching instead of the traditional timing controller control switching design method when the power adapter power supply module and the battery power supply module are switched, which solves the problem of the traditional power adapter of the server to the battery. The risk of system power failure or partial component power failure caused by the voltage drop that may occur during power supply switching improves the product stability of the server.
上述虽然结合附图对本发明的具体实施方式进行了描述，但并非对本发明保护范围的限制，所属领域技术人员应该明白，在本发明的技术方案的基础上，本领域技术人员不需要付出创造性劳动即可做出的各种修改或变形仍在本发明的保护范围以内。Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810036536.7A CN108039770A (en) | 2018-01-15 | 2018-01-15 | A kind of server power supply adapter and battery powered seamless handover method and circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810036536.7A CN108039770A (en) | 2018-01-15 | 2018-01-15 | A kind of server power supply adapter and battery powered seamless handover method and circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108039770A true CN108039770A (en) | 2018-05-15 |
Family
ID=62096731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810036536.7A Pending CN108039770A (en) | 2018-01-15 | 2018-01-15 | A kind of server power supply adapter and battery powered seamless handover method and circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108039770A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525033A (en) * | 2018-11-29 | 2019-03-26 | 威创集团股份有限公司 | Power supply circuit, method and low-power projection device |
| CN110336367A (en) * | 2019-07-12 | 2019-10-15 | 苏州浪潮智能科技有限公司 | A kind of control device and server |
| WO2021195509A3 (en) * | 2020-03-26 | 2021-12-16 | Zonit Structured Solutions, Llc | Intelligent automatic transfer switch module |
| CN115085362A (en) * | 2022-07-18 | 2022-09-20 | 京东科技信息技术有限公司 | Power supply method, system, controller and cabinet |
| CN115189444A (en) * | 2022-07-25 | 2022-10-14 | 中国电子科技集团公司第五十四研究所 | Power supply circuit of mobile phone power supply |
| WO2024021473A1 (en) * | 2022-07-25 | 2024-02-01 | 上海闻泰信息技术有限公司 | Power supply switching circuit, system and method for electronic device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728866A (en) * | 2008-10-21 | 2010-06-09 | 中兴通讯股份有限公司 | Device and method for realizing switching of power supply |
| CN102570590A (en) * | 2012-01-05 | 2012-07-11 | 青岛经济技术开发区创统科技发展有限公司 | Solid-state changeover switch |
| CN104508942A (en) * | 2012-07-25 | 2015-04-08 | 东芝三菱电机产业系统株式会社 | Power Systems |
| CN105912089A (en) * | 2016-04-07 | 2016-08-31 | 浪潮电子信息产业股份有限公司 | Battery redundancy method, device and system |
| CN107037868A (en) * | 2017-05-23 | 2017-08-11 | 郑州云海信息技术有限公司 | A kind of cold standby TURP based on storage system changes system and method |
-
2018
- 2018-01-15 CN CN201810036536.7A patent/CN108039770A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728866A (en) * | 2008-10-21 | 2010-06-09 | 中兴通讯股份有限公司 | Device and method for realizing switching of power supply |
| CN102570590A (en) * | 2012-01-05 | 2012-07-11 | 青岛经济技术开发区创统科技发展有限公司 | Solid-state changeover switch |
| CN104508942A (en) * | 2012-07-25 | 2015-04-08 | 东芝三菱电机产业系统株式会社 | Power Systems |
| CN105912089A (en) * | 2016-04-07 | 2016-08-31 | 浪潮电子信息产业股份有限公司 | Battery redundancy method, device and system |
| CN107037868A (en) * | 2017-05-23 | 2017-08-11 | 郑州云海信息技术有限公司 | A kind of cold standby TURP based on storage system changes system and method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525033A (en) * | 2018-11-29 | 2019-03-26 | 威创集团股份有限公司 | Power supply circuit, method and low-power projection device |
| CN110336367A (en) * | 2019-07-12 | 2019-10-15 | 苏州浪潮智能科技有限公司 | A kind of control device and server |
| WO2021195509A3 (en) * | 2020-03-26 | 2021-12-16 | Zonit Structured Solutions, Llc | Intelligent automatic transfer switch module |
| CN115085362A (en) * | 2022-07-18 | 2022-09-20 | 京东科技信息技术有限公司 | Power supply method, system, controller and cabinet |
| CN115189444A (en) * | 2022-07-25 | 2022-10-14 | 中国电子科技集团公司第五十四研究所 | Power supply circuit of mobile phone power supply |
| WO2024021473A1 (en) * | 2022-07-25 | 2024-02-01 | 上海闻泰信息技术有限公司 | Power supply switching circuit, system and method for electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108039770A (en) | A kind of server power supply adapter and battery powered seamless handover method and circuit | |
| CN203056953U (en) | Driver and bus capacitor discharge circuit thereof | |
| CN201750204U (en) | A DC dual power supply intelligent switching device | |
| CN201750208U (en) | Embedded equipment dual power supply automatic switching circuit with backup battery | |
| CN209675961U (en) | A kind of pre-charging device for integrating PTC controller | |
| CN209642395U (en) | A kind of double power supply converting switch and power-supply system | |
| CN107947251A (en) | The anti-rush of current of the whole star of composite bus system satellite adds power-off system | |
| JP2025124687A (en) | Method for reducing stress on UPS components during transition from inverter to green/bypass operation - Patent Application 20070122997 | |
| CN203434637U (en) | Energy storage system | |
| CN204721088U (en) | A kind of UPS bypass inversion switching device shifter | |
| CN202127283U (en) | Circuit backup power automatic switching protection device | |
| CN110739758A (en) | An uninterruptible power supply and distribution system | |
| CN207801476U (en) | A kind of CPCI power supply backplanes with alternating current-direct current automatic switching function | |
| CN104600834A (en) | Emergency power supply circuit and power supply circuit conversion method | |
| CN113904430B (en) | System maintenance device based on standby power supply | |
| CN104578377B (en) | Cabinet power-supply system, power supply method for handover control and cabinet | |
| CN111181240A (en) | Connection method of energy storage battery and UPS and charge-discharge control method | |
| CN102214918A (en) | High-reliability power supply system, method and frequency converter system | |
| CN205666679U (en) | UPS of bypass automatic switch -over type | |
| CN203301212U (en) | Dual standby saving type DC power supply system | |
| CN103414240A (en) | Direct current power supply automatic control device | |
| CN205123398U (en) | Incessant direct current device | |
| CN204376525U (en) | A kind of emergency supply circuit | |
| CN203368133U (en) | Direct-current power supply automatic control device | |
| TWI423551B (en) | Smart operation mode switcher of power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180515 |
|
| RJ01 | Rejection of invention patent application after publication |