CN111525675A - An AC-DC switching power supply circuit, method and circuit breaker - Google Patents

An AC-DC switching power supply circuit, method and circuit breaker Download PDF

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Publication number
CN111525675A
CN111525675A CN202010362390.2A CN202010362390A CN111525675A CN 111525675 A CN111525675 A CN 111525675A CN 202010362390 A CN202010362390 A CN 202010362390A CN 111525675 A CN111525675 A CN 111525675A
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contact
power supply
terminal
control
switch
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何建宗
何文志
夏云峰
薛峰
梁万龙
叶容慧
张忠豪
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Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
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Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04Circuit 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

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Abstract

The embodiment of the invention discloses an alternating current-direct current switching power supply circuit, a method and a circuit breaker. The alternating current-direct current switching power supply circuit comprises a switching circuit, a power supply switch, an arc extinguishing circuit, an alternating current power supply input end, a direct current power supply input end and a power supply output end; when the switching circuit controls the connection between the input end of the alternating current power supply and the power supply switch, the switching circuit controls the disconnection between the arc extinguishing circuit and the power supply output end, so that when the input end of the alternating current power supply is connected with the power supply switch, the direct current power supply is disconnected with the power supply output end, and alternating current power supply is realized when the power supply switch is closed; and when the direct current power supply input end is controlled to be conducted with the power supply switch, the arc extinguishing circuit is controlled to be conducted with the power supply output end, so that the direct current power supply is conducted with the power supply output end, and direct current power supply is achieved when the power supply switch is closed. Therefore, the alternating current power supply and the direct current power supply can be conveniently switched by only one switching circuit, and the power supply efficiency and the power supply reliability of the load are improved.

Description

一种交直流切换供电电路、方法及断路器An AC-DC switching power supply circuit, method and circuit breaker

技术领域technical field

本发明实施例涉及电气技术领域,尤其涉及一种交直流切换供电电路、方法及断路器。Embodiments of the present invention relate to the field of electrical technology, and in particular, to an AC-DC switching power supply circuit, method, and circuit breaker.

背景技术Background technique

交直流混合配电网结合了交流电与直流电的优势,能为用户提供更可靠、更高效的供电方式。直流电源在效率上表示出一定优势,交流电源在成本和稳定性上占优,在目前以及将来较长的时间内交流电与直流电仍将具有不同优势而并存。The AC/DC hybrid distribution network combines the advantages of AC and DC, and can provide users with a more reliable and efficient power supply method. DC power shows certain advantages in efficiency, and AC power is dominant in cost and stability. At present and for a long time in the future, AC and DC will still have different advantages and coexist.

现在,各种电器设备也逐渐支持直流电源输入的同时仍然适配交流电源输入,例如空调机、电视机、IT服务器、充电桩等。而交直流电源的切换供电,通常都是分别对直流电源和交流电源设计单独的供电电路,同时还需在各自的电路中配合断路器,实现需要直流电源供电时利用直流断路器切换到直流电路,需要交流电源供电时通过交流断路器切换到交流电路,电路的单独设计以及多个断路器的使用往往会存在整个交直流电源的切换供电繁杂,且效率低下的问题。Now, various electrical devices are gradually supporting DC power input while still adapting to AC power input, such as air conditioners, TVs, IT servers, charging piles, etc. In the switching power supply of AC and DC power supply, separate power supply circuits are usually designed for the DC power supply and the AC power supply, and circuit breakers are also required in their respective circuits to realize the use of DC circuit breakers to switch to DC circuits when DC power supply is required. , when the AC power supply is required to switch to the AC circuit through the AC circuit breaker, the separate design of the circuit and the use of multiple circuit breakers often cause the switching power supply of the entire AC and DC power supply to be complicated and inefficient.

发明内容SUMMARY OF THE INVENTION

本发明实施例提供一种交直流切换供电电路、方法及断路器,以实现仅通过一个切换电路对交流电源和直流电源进行便捷切换,提高对负载的供电效率以及供电的可靠性。Embodiments of the present invention provide an AC-DC switching power supply circuit, method, and circuit breaker, so as to realize convenient switching between AC power and DC power through only one switching circuit, and improve power supply efficiency and reliability of power supply to loads.

第一方面,本发明实施例提供了一种交直流切换供电电路,包括:切换电路、供电开关、灭弧电路、交流电源输入端、直流电源输入端和电源输出端,电源输出端用于连接负载;In a first aspect, an embodiment of the present invention provides an AC-DC switching power supply circuit, including: a switching circuit, a power supply switch, an arc extinguishing circuit, an AC power input terminal, a DC power input terminal and a power output terminal, and the power output terminal is used to connect load;

供电开关包括第一端和第二端,第二端与电源输出端电连接;The power supply switch includes a first end and a second end, and the second end is electrically connected with the power output end;

灭弧电路包括第三端和第四端,第三端与直流电源输入端电连接;The arc extinguishing circuit includes a third end and a fourth end, and the third end is electrically connected to the input end of the DC power supply;

切换电路分别与交流电源输入端、第一端、第二端、第三端以及第四端电连接,用于控制交流电源输入端与第一端之间的导通状态、第三端与第一端之间的导通状态以及第四端与第二端之间的导通状态;并在控制交流电源输入端与第一端导通时,控制第四端与第二端之间断开;以及在控制第三端与第一端导通时,控制第四端与第二端导通。The switching circuit is respectively electrically connected with the AC power input terminal, the first terminal, the second terminal, the third terminal and the fourth terminal, and is used to control the conduction state between the AC power input terminal and the first terminal, the third terminal and the third terminal The conduction state between one end and the conduction state between the fourth end and the second end; and when controlling the conduction between the AC power input end and the first end, the fourth end and the second end are controlled to be disconnected; and when the third end is controlled to be connected to the first end, the fourth end is controlled to be connected to the second end.

可选地,切换电路包括第一切换开关和第二切换开关;Optionally, the switching circuit includes a first switching switch and a second switching switch;

第一切换开关包括第一触点、第二触点和公共触点,第二切换开关包括第三触点和第四触点;The first switch includes a first contact, a second contact and a common contact, and the second switch includes a third contact and a fourth contact;

第一触点与交流电源输入端电连接,第二触点与灭弧电路的第三端电连接,公共触点与供电开关的第一端电连接;第三触点与灭弧电路的第四端电连接,第四触点与供电开关的第二端连接。The first contact is electrically connected to the input end of the AC power supply, the second contact is electrically connected to the third end of the arc extinguishing circuit, the common contact is electrically connected to the first end of the power supply switch; the third contact is electrically connected to the third end of the arc extinguishing circuit. The four terminals are electrically connected, and the fourth contact is connected to the second terminal of the power supply switch.

可选地,第一切换开关和第二切换开关为机械联动开关。Optionally, the first switch and the second switch are mechanical linkage switches.

可选地,还包括控制器,控制器包括第一检测端、第二检测端、第一输出端和第二输出端;第一切换开关和第二切换开关均包括控制端;Optionally, it also includes a controller, the controller includes a first detection terminal, a second detection terminal, a first output terminal and a second output terminal; the first switch and the second switch both include a control terminal;

第一检测端与第一触点电连接,第一输出端与第一切换开关的控制端电连接,第二检测端与第二触点电连接,第二输出端与第二切换开关的控制端电连接。The first detection terminal is electrically connected to the first contact, the first output terminal is electrically connected to the control terminal of the first switch, the second detection terminal is electrically connected to the second contact, and the second output terminal is electrically connected to the control terminal of the second switch. terminal electrical connection.

控制器用于在第一检测端的第一电压检测信号小于第一阈值电压时,通过第一输出端输出第一控制信号以控制第一触点与公共触点的断开,控制第二触点与公共触点连接;以及通过第二输出端输出第二控制信号以控制第四触点与第三触点连接;The controller is used to output a first control signal through the first output terminal to control the disconnection of the first contact and the common contact, and control the second contact to be connected to the common contact when the first voltage detection signal of the first detection terminal is less than the first threshold voltage. The common contact is connected; and the second control signal is output through the second output terminal to control the connection of the fourth contact and the third contact;

控制器还用于在第二检测端的第二电压检测信号小于第二阈值电压时,通过第一输出端输出第三控制信号以控制第二触点与公共触点的断开,控制第一触点与公共触点连接,以及通过第二输出端输出第四控制信号以控制第四触点与第三触点断开。The controller is further configured to output a third control signal through the first output terminal to control the disconnection of the second contact from the common contact and control the first contact when the second voltage detection signal of the second detection terminal is less than the second threshold voltage. The point is connected with the common contact, and a fourth control signal is output through the second output terminal to control the fourth contact to be disconnected from the third contact.

可选地,还包括控制器,控制器包括第一检测端、第二检测端和输出端;第一切换开关包括控制端;Optionally, it also includes a controller, the controller includes a first detection end, a second detection end and an output end; the first switch includes a control end;

第一检测端与第一触点电连接,第二检测端与第二触点电连接,输出端与第一切换开关的控制端电连接,控制器用于在第一检测端的第一电压检测信号小于第一阈值电压时,通过输出端输出第一控制信号以控制第一触点与公共触点的断开,第二触点与公共触点连接;The first detection terminal is electrically connected to the first contact, the second detection terminal is electrically connected to the second contact, the output terminal is electrically connected to the control terminal of the first switch, and the controller is used to detect the first voltage at the first detection terminal. When the voltage is less than the first threshold value, the first control signal is output through the output terminal to control the disconnection of the first contact and the common contact, and the second contact is connected to the common contact;

控制器还用于在第二检测端的第二电压检测信号小于第二阈值电压时,通过输出端输出第二控制信号以控制第一触点与公共触点的连接,第二触点与公共触点断开;The controller is also used for outputting a second control signal through the output terminal to control the connection between the first contact and the common contact, and the second contact and the common contact when the second voltage detection signal at the second detection terminal is less than the second threshold voltage. point disconnect;

其中,第一触点与公共触点连接时,第三触点与第四触点断开;第二触点与公共触点连接时,第三触点与第四触点连接。Wherein, when the first contact is connected with the common contact, the third contact is disconnected from the fourth contact; when the second contact is connected with the common contact, the third contact is connected with the fourth contact.

可选地,灭弧电路包括吸收电路和耦合负压电路;吸收电路和耦合负压电路并联连接。Optionally, the arc extinguishing circuit includes an absorption circuit and a coupling negative voltage circuit; the absorption circuit and the coupling negative voltage circuit are connected in parallel.

第二方面,本发明实施例还提供一种交直流切换供电方法,应用于如上述第一方面中任一交直流切换供电电路,交直流切换供电方法包括:In a second aspect, an embodiment of the present invention further provides an AC-DC switching power supply method, which is applied to any AC-DC switching power supply circuit in the above-mentioned first aspect, and the AC-DC switching power supply method includes:

在控制交流电源输入端与第一端导通时,控制第四端与第二端之间断开;以及在控制第三端与第一端导通时,控制第四端与第二端导通。When the AC power input terminal is controlled to be connected to the first terminal, the fourth terminal is controlled to be disconnected from the second terminal; and when the third terminal is controlled to be connected to the first terminal, the fourth terminal is controlled to be connected to the second terminal. .

可选地,交直流切换供电电路还包括控制器,控制器包括第一检测端、第二检测端、第一输出端和第二输出端;第一切换开关和第二切换开关均包括控制端;第一检测端与第一触点电连接,第一输出端与第一切换开关的控制端电连接,第二检测端与第二触点电连接,第二输出端与第二切换开关的控制端电连接;Optionally, the AC-DC switching power supply circuit further includes a controller, and the controller includes a first detection terminal, a second detection terminal, a first output terminal and a second output terminal; both the first switch and the second switch include a control terminal. The first detection terminal is electrically connected to the first contact, the first output terminal is electrically connected to the control terminal of the first switch, the second detection terminal is electrically connected to the second contact, and the second output terminal is electrically connected to the control terminal of the second switch. The control terminal is electrically connected;

在控制交流电源输入端与第一端导通时,控制第四端与第二端之间断开;以及在控制第三端与第一端导通时,控制第四端与第二端导通,包括:When the AC power input terminal is controlled to be connected to the first terminal, the fourth terminal is controlled to be disconnected from the second terminal; and when the third terminal is controlled to be connected to the first terminal, the fourth terminal is controlled to be connected to the second terminal. ,include:

控制器在第一检测端的第一电压检测信号小于第一阈值电压时,通过第一输出端输出第一控制信号以控制第一触点与公共触点的断开,控制第二触点与公共触点连接;以及通过第二输出端输出第二控制信号以控制第四触点与第三触点连接;When the first voltage detection signal of the first detection terminal is less than the first threshold voltage, the controller outputs a first control signal through the first output terminal to control the disconnection of the first contact and the common contact, and control the second contact to be connected to the common contact. contact connection; and outputting a second control signal through the second output terminal to control the connection between the fourth contact and the third contact;

控制器在第二检测端的第二电压检测信号小于第二阈值电压时,通过第一输出端输出第三控制信号以控制第二触点与公共触点的断开,控制第一触点与公共触点连接,以及通过第二输出端输出第四控制信号以控制第四触点与第三触点连接。When the second voltage detection signal of the second detection terminal is less than the second threshold voltage, the controller outputs a third control signal through the first output terminal to control the disconnection between the second contact and the common contact, and control the first contact and the common contact The contacts are connected, and a fourth control signal is output through the second output terminal to control the connection between the fourth contact and the third contact.

可选地,交直流切换供电电路还包括控制器,控制器包括第一检测端、第二检测端和输出端;第一切换开关包括控制端;第一检测端与第一触点电连接,第二检测端与第二触点电连接,输出端与第一切换开关的控制端电连接;第一切换开关和第二切换开关为机械联动开关;Optionally, the AC-DC switching power supply circuit further includes a controller, the controller includes a first detection terminal, a second detection terminal and an output terminal; the first switch includes a control terminal; the first detection terminal is electrically connected to the first contact, The second detection terminal is electrically connected to the second contact, and the output terminal is electrically connected to the control terminal of the first switch; the first switch and the second switch are mechanical linkage switches;

在控制交流电源输入端与第一端导通时,控制第四端与第二端之间断开;以及在控制第三端与第一端导通时,控制第四端与第二端导通,包括:When the AC power input terminal is controlled to be connected to the first terminal, the fourth terminal is controlled to be disconnected from the second terminal; and when the third terminal is controlled to be connected to the first terminal, the fourth terminal is controlled to be connected to the second terminal. ,include:

控制器在第一检测端的第一电压检测信号小于第一阈值电压时,通过输出端输出第一控制信号以控制第一触点与公共触点的断开,第二触点与公共触点连接;When the first voltage detection signal of the first detection terminal is less than the first threshold voltage, the controller outputs a first control signal through the output terminal to control the disconnection of the first contact and the common contact, and the second contact is connected to the common contact ;

控制器在第二检测端的第二电压检测信号小于第二阈值电压时,通过输出端输出第二控制信号以控制第一触点与公共触点的连接,第二触点与公共触点断开;When the second voltage detection signal of the second detection terminal is less than the second threshold voltage, the controller outputs a second control signal through the output terminal to control the connection between the first contact and the common contact, and the second contact is disconnected from the common contact ;

其中,第一触点与公共触点连接时,第三触点与第四触点断开;第二触点与公共触点连接时,第三触点与第四触点连接。Wherein, when the first contact is connected with the common contact, the third contact is disconnected from the fourth contact; when the second contact is connected with the common contact, the third contact is connected with the fourth contact.

第三方面,本发明实施例还提供一种交直流供电断路器,包括如上述第一方面任一交直流切换供电电路。In a third aspect, an embodiment of the present invention further provides an AC-DC power supply circuit breaker, including any AC-DC switching power supply circuit as described in the first aspect above.

本发明实施例提供的交直流切换供电电路,通过设置交流电源输入端与直流电源输入端接入同一切换电路中。通过切换电路在控制交流电源输入端与供电开关的第一端导通时,控制灭弧电路与供电开关的第二端(连接电源输出端)之间断开,使得交流电源输入端与供电开关连接时,直流电源可以与电源输出端之间断开,从而在供电开关闭合时实现交流供电;以及在控制灭弧电路的第三端与供电开关的第一端导通时,控制灭弧回路的第四端与供电开关的第二端导通,使得直流电源可以与电源输出端导通,从而在供电开关闭合时实现直流供电。解决了现有的对负载提供交流、直流电源时需要单独设置控制电路,即单独设置两个直流和交流电源的电路而带来的电路繁琐性以及供电的低效性问题,实现了仅通过一个切换电路对负载提供交流和直流电源时的便捷切换,提高了对负载的供电效率以及供电的可靠性。In the AC-DC switching power supply circuit provided by the embodiment of the present invention, the input terminal of the AC power supply and the input terminal of the DC power supply are arranged to be connected to the same switching circuit. Through the switching circuit, when the control AC power input terminal and the first terminal of the power supply switch are turned on, the arc extinguishing circuit is controlled to be disconnected from the second terminal (connected to the power output terminal) of the power supply switch, so that the AC power input terminal is connected to the power supply switch. When the power supply is switched on, the DC power supply can be disconnected from the output terminal of the power supply, so as to realize the AC power supply when the power supply switch is closed; The four terminals are connected with the second terminal of the power supply switch, so that the DC power supply can be connected with the output terminal of the power supply, so that the DC power supply is realized when the power supply switch is closed. It solves the problems of cumbersome circuit and inefficiency of power supply caused by the need to set up a separate control circuit when providing AC and DC power to the load, that is, to set up two circuits of DC and AC power separately. The switching circuit provides convenient switching of AC and DC power to the load, which improves the power supply efficiency to the load and the reliability of the power supply.

附图说明Description of drawings

图1为本发明实施例提供的一种交直流切换供电电路的结构示意图;1 is a schematic structural diagram of an AC-DC switching power supply circuit according to an embodiment of the present invention;

图2为本发明实施例提供的另一种交直流切换供电电路的结构示意图;2 is a schematic structural diagram of another AC-DC switching power supply circuit provided by an embodiment of the present invention;

图3为本发明实施例提供的另一种交直流切换供电电路的结构示意图;3 is a schematic structural diagram of another AC-DC switching power supply circuit provided by an embodiment of the present invention;

图4为本发明实施例提供的另一种交直流切换供电电路的结构示意图;4 is a schematic structural diagram of another AC-DC switching power supply circuit provided by an embodiment of the present invention;

图5为本发明实施例提供的一种交直流切换供电方法流程图。FIG. 5 is a flowchart of an AC-DC switching power supply method according to an embodiment of the present invention.

具体实施方式Detailed ways

下面结合附图和实施例对本发明作进一步的详细说明。可以理解的是,此处所描述的具体实施例仅仅用于解释本发明,而非对本发明的限定。另外还需要说明的是,为了便于描述,附图中仅示出了与本发明相关的部分而非全部结构。The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.

下述所有本发明实施例中所提供的交直流切换供电电路、交直流切换方法以及交直流供电断路器,均可适用于为供电设备根据实际需要对交流电源和直流电源的两种供电电源进行任意切换的情景中。All of the AC-DC switching power supply circuits, AC-DC switching methods, and AC-DC power supply circuit breakers provided in the following embodiments of the present invention can be applied to power supply equipment according to actual needs for AC power supply and DC power supply. in any switching situation.

图1为本发明实施例提供的一种交直流切换供电电路的结构示意图,如图1所示,该交直流切换供电电路包括:切换电路10、供电开关K、灭弧电路20、交流电源输入端A、直流电源输入端B和电源输出端C,电源输出端C用于连接负载;FIG. 1 is a schematic structural diagram of an AC/DC switching power supply circuit provided by an embodiment of the present invention. As shown in FIG. 1 , the AC/DC switching power supply circuit includes: a switching circuit 10, a power supply switch K, an arc extinguishing circuit 20, an AC power input Terminal A, DC power input terminal B and power output terminal C, power output terminal C is used to connect the load;

供电开关K包括第一端q1和第二端q2,第二端q2与电源输出端C电连接;The power supply switch K includes a first end q1 and a second end q2, and the second end q2 is electrically connected to the power output end C;

灭弧电路20包括第三端q3和第四端q4,第三端q3与直流电源输入端B电连接;The arc extinguishing circuit 20 includes a third end q3 and a fourth end q4, and the third end q3 is electrically connected to the DC power input end B;

切换电路10分别与交流电源输入端A、第一端q1、第二端q2、第三端q3以及第四端q4电连接,用于控制交流电源输入端A与第一端q1之间的导通状态、第三端q3与第一端q1之间的导通状态以及第四端q4与第二端q2之间的导通状态;并在控制交流电源输入端A与第一端q1导通时,控制第四端q4与第二端q2之间断开;以及在控制第三端q3与第一端q1导通时,控制第四端q4与第二端q2导通。The switching circuit 10 is respectively electrically connected with the AC power input terminal A, the first terminal q1, the second terminal q2, the third terminal q3 and the fourth terminal q4, and is used to control the conduction between the AC power input terminal A and the first terminal q1. The conduction state, the conduction state between the third terminal q3 and the first terminal q1, and the conduction state between the fourth terminal q4 and the second terminal q2; and the control AC power input terminal A and the first terminal q1 are turned on When the fourth end q4 and the second end q2 are controlled to be disconnected; and when the third end q3 and the first end q1 are controlled to be turned on, the fourth end q4 and the second end q2 are controlled to be turned on.

具体地,交流电源输入端A用于向交直流切换供电电路输入交流电源,直流电源输入端B用于向交直流切换供电电路输入直流电源。Specifically, the AC power input terminal A is used to input AC power to the AC-DC switching power supply circuit, and the DC power input terminal B is used to input DC power to the AC-DC switching power supply circuit.

当需要向负载提供交流电源或者无法通过直流电源输入端B对负载供电时,闭合供电开关K,切换电路10自身控制交流电源输入端A与供电开关K的第一端q1之间导通、灭弧电路20的第三端q3与供电开关K的第一端q1之间断开以及灭弧电路20的第四端q4与供电开关K的第二端q2之间断开,或者人为对切换电路10进行动作,以使交流电源输入端A与供电开关K的第一端q1之间导通、灭弧电路20的第三端q3与供电开关K的第一端q1之间断开以及灭弧电路20的第四端q4与供电开关K的第二端q2之间断开。以此使得交流电源输入端A、供电开关K以及电源输出端C之间形成一通路,交流电源通过交流电源输入端A以及电源输出端C为负载提供交流电源。When the AC power supply needs to be supplied to the load or the load cannot be supplied with power through the DC power input terminal B, the power supply switch K is closed, and the switching circuit 10 controls the connection between the AC power input terminal A and the first terminal q1 of the power supply switch K to turn on or off. The third terminal q3 of the arc circuit 20 is disconnected from the first terminal q1 of the power supply switch K, and the fourth terminal q4 of the arc extinguishing circuit 20 is disconnected from the second terminal q2 of the power supply switch K, or the switching circuit 10 is manually switched. action to make the connection between the AC power input terminal A and the first terminal q1 of the power supply switch K, the disconnection between the third terminal q3 of the arc extinguishing circuit 20 and the first terminal q1 of the power supply switch K, and the disconnection of the arc extinguishing circuit 20 The fourth terminal q4 is disconnected from the second terminal q2 of the power supply switch K. In this way, a path is formed between the AC power input terminal A, the power supply switch K and the power supply output terminal C, and the AC power supply provides AC power to the load through the AC power input terminal A and the power supply output terminal C.

当需要向负载提供直流电源或者无法通过交流电源输入端A对负载供电时,闭合供电开关K,切换电路10控制交流电源输入端A与供电开关K的第一端q1之间断开、灭弧电路20的第三端q3与供电开关K的第一端q1之间导通以及灭弧电路20的第四端q4与供电开关K的第二端q2之间导通,或者人为对切换电路10进行动作,以使交流电源输入端A与供电开关K的第一端q1之间断开、灭弧电路20的第三端q3与供电开关K的第一端q1之间导通以及灭弧电路20的第四端q4与供电开关K的第二端q2之间导通。以此使得直流电源输入端B、供电开关K以及电源输出端C之间形成一通路,直流电源通过直流电源输入端B以及电源输出端C为负载提供交流电源。When the DC power supply needs to be supplied to the load or the load cannot be powered through the AC power input terminal A, the power supply switch K is closed, and the switching circuit 10 controls the disconnection and arc extinguishing circuit between the AC power input terminal A and the first terminal q1 of the power supply switch K The conduction between the third terminal q3 of the 20 and the first terminal q1 of the power supply switch K and the conduction between the fourth terminal q4 of the arc extinguishing circuit 20 and the second terminal q2 of the power supply switch K, or the switching circuit 10 is artificially switched. action, so that the AC power input terminal A and the first terminal q1 of the power supply switch K are disconnected, the third terminal q3 of the arc-extinguishing circuit 20 and the first terminal q1 of the power supply switch K are connected, and the arc-extinguishing circuit 20 is connected. The connection between the fourth terminal q4 and the second terminal q2 of the power supply switch K is conducted. In this way, a path is formed between the DC power input terminal B, the power supply switch K and the power output terminal C, and the DC power supply provides the load with AC power through the DC power input terminal B and the power output terminal C.

其中,供电开关K可以为真空开关,供电开关K的控制方式可以是远程遥控控制方式或者人工手动操作控制。当切换电路10控制供电开关K与交流输入端之间,或者与直流输入端之间导通或断开的瞬间,会在直流电源输入端B所在通路产生电弧效应,从而对直流电源向负载的供电造成影响,灭弧电路20的设置将电弧效应消除,保证直流电源向负载供电的可靠性。可选地,灭弧电路20包括吸收电路21和耦合负压电路22;吸收电路21和耦合负压电路22并联连接。Wherein, the power supply switch K may be a vacuum switch, and the control mode of the power supply switch K may be a remote control mode or manual manual operation control. When the switching circuit 10 controls the connection between the power supply switch K and the AC input terminal, or between the DC input terminal and the DC input terminal, an arc effect will be generated in the path where the DC power supply input terminal B is located. The power supply affects the power supply, and the arc extinguishing circuit 20 is provided to eliminate the arc effect and ensure the reliability of the DC power supply to supply power to the load. Optionally, the arc extinguishing circuit 20 includes an absorption circuit 21 and a coupling negative voltage circuit 22; the absorption circuit 21 and the coupling negative voltage circuit 22 are connected in parallel.

本发明实施例提供的交直流切换供电电路,通过设置交流电源输入端与直流电源输入端接入同一切换电路中。切换电路在控制交流电源输入端与供电开关的第一端导通时,控制灭弧电路与供电开关的第二端之间断开,使得交流电源输入端与供电开关连接时,直流电源与电源输出端之间断开,从而在供电开关闭合时实现交流供电;以及在控制灭弧电路的第三端与供电开关的第一端导通时,控制灭弧回路的第四端与供电开关的第二端导通,使得直流电源与电源输出端导通,从而在供电开关闭合时实现直流供电。据此,实现了仅通过一个切换电路对负载提供交流和直流电源时的便捷切换,提高了对负载的供电效率以及供电的可靠性。In the AC-DC switching power supply circuit provided by the embodiment of the present invention, the input terminal of the AC power supply and the input terminal of the DC power supply are arranged to be connected to the same switching circuit. When the switching circuit controls the conduction between the AC power input terminal and the first terminal of the power supply switch, it controls the disconnection between the arc extinguishing circuit and the second terminal of the power supply switch, so that when the AC power input terminal is connected with the power supply switch, the DC power supply and the power supply output When the power supply switch is closed, the AC power supply is realized; and when the third end of the control arc extinguishing circuit and the first end of the power supply switch are turned on, the fourth end of the arc extinguishing circuit and the second end of the power supply switch are controlled The terminal is turned on, so that the DC power supply and the output terminal of the power supply are connected, so as to realize the DC power supply when the power supply switch is closed. Accordingly, convenient switching is realized when the AC and DC power supplies are provided to the load through only one switching circuit, and the power supply efficiency to the load and the reliability of the power supply are improved.

继续参考图1,可选地,切换电路10包括第一切换开关K1和第二切换开关K2;Continuing to refer to FIG. 1 , optionally, the switching circuit 10 includes a first switching switch K1 and a second switching switch K2;

第一切换开关K1包括第一触点t1、第二触点t2和公共触点t,第二切换开关K2包括第三触点t3和第四触点t4;The first switch K1 includes a first contact t1, a second contact t2 and a common contact t, and the second switch K2 includes a third contact t3 and a fourth contact t4;

第一触点t1与交流电源输入端A电连接,第二触点t2与灭弧电路20的第三端q3电连接,公共触点t与供电开关的第一端q1电连接;第三触点t3与灭弧电路20的第四端q4电连接,第四触点t4与供电开关的第二端q2连接。The first contact t1 is electrically connected to the input terminal A of the AC power supply, the second contact t2 is electrically connected to the third terminal q3 of the arc extinguishing circuit 20, and the common contact t is electrically connected to the first terminal q1 of the power supply switch; The point t3 is electrically connected to the fourth end q4 of the arc extinguishing circuit 20, and the fourth contact t4 is connected to the second end q2 of the power supply switch.

具体地,当需要向负载提供交流电源或者无法通过直流电源输入端B对负载供电时,闭合供电开关,可控制第一切换开关K1的第一触点t1与第一切换开关K1的公共触点t导通、控制第一切换开关K1的第二触点t2与第一切换开关K1的公共触点t断开以及控制第二切换开关K2的第三触点t3与第四触点t4断开,以此使得交流电源输入端A、供电开关以及电源输出端C之间形成一通路,交流电源通过交流电源输入端A以及电源输出端C为负载提供交流电源。Specifically, when the load needs to be supplied with AC power or cannot supply power to the load through the DC power input terminal B, the power supply switch is closed to control the first contact t1 of the first switch K1 and the common contact of the first switch K1 t is turned on, the second contact t2 of the first switch K1 is controlled to be disconnected from the common contact t of the first switch K1, and the third contact t3 of the second switch K2 is controlled to be disconnected from the fourth contact t4 In this way, a path is formed between the AC power input terminal A, the power supply switch and the power supply output terminal C, and the AC power supply provides AC power for the load through the AC power input terminal A and the power supply output terminal C.

当需要向负载提供直流电源或者无法通过交流电源输入端A对负载供电时,闭合供电开关,可控制第一切换开关K1的第二触点t2与第一切换开关K1的公共触点t导通、控制第一切换开关K1的第一触点t1与第一切换开关K1的公共触点t断开以及控制控制第二切换开关K2的第三触点t3与第四触点t4导通。以此使得直流电源输入端B、供电开关以及电源输出端C之间形成一通路,直流电源通过直流电源输入端B以及电源输出端C为负载提供交流电源,同时,灭弧电路20也在该通路中接通,而将供电开关导通或断开时的电弧效应消除,保证直流电源向负载供电的可靠性。When it is necessary to provide DC power to the load or it is impossible to supply power to the load through the AC power input terminal A, the power supply switch is closed to control the second contact t2 of the first switch K1 and the common contact t of the first switch K1 to conduct , control the first contact t1 of the first switch K1 to be disconnected from the common contact t of the first switch K1, and control the third contact t3 and the fourth contact t4 of the second switch K2 to conduct. In this way, a path is formed between the DC power input terminal B, the power supply switch and the power supply output terminal C, and the DC power supply provides AC power for the load through the DC power supply input terminal B and the power supply output terminal C. At the same time, the arc extinguishing circuit 20 is also in this The circuit is connected, and the arc effect when the power switch is turned on or off is eliminated, so as to ensure the reliability of the DC power supply to the load.

其中,第一切换开关K1和第二切换开关K2均可以是机械开关,例如第一切换开关K1可以是包括两个触点的自动转换开关。此外,可以是通过远程遥控的方式对第一切换开关K1和第二切换开关K2进行控制,或者是人工手动操作的方式对第一切换开关K1和第二切换开关K2进行控制,再或者是在交流电源出入端和直流电源输入端B中任意一个无法对负载正常供电时,第一切换开关K1和第二切换开关K2自动进行动作,实现交流电源输入端A与直流电源输入端B之间自动切换以保证对负载供电的不断电。Wherein, both the first switch K1 and the second switch K2 may be mechanical switches, for example, the first switch K1 may be an automatic switch including two contacts. In addition, the first switch K1 and the second switch K2 may be controlled by remote control, or the first switch K1 and the second switch K2 may be controlled by manual operation, or the When either of the AC power input and output terminals and the DC power input terminal B cannot supply power to the load normally, the first switch K1 and the second switch K2 automatically operate to realize automatic switching between the AC power input terminal A and the DC power input terminal B. Switch to ensure uninterrupted power supply to the load.

图2为本发明实施例提供的另一种交直流切换供电电路的结构示意图,如图2所示,可选地,第一切换开关K1和第二切换开关K2为机械联动开关。FIG. 2 is a schematic structural diagram of another AC-DC switching power supply circuit according to an embodiment of the present invention. As shown in FIG. 2 , optionally, the first switch K1 and the second switch K2 are mechanical linkage switches.

具体地,可以将第一切换开关K1和第二切换开关K2之间联动设置,使得仅控制第一切换开关K1或第二切换开关K2中的一个时,另一个随之联动,以此将交直流切换供电电路的控制进一步简化,减少了两个切换开关分开单独控制时的不同步带来的延时,进一步提高供电效率。具体对第一切换开关K1和第二切换开关K2之间的联动设置可以是利用电路内部的控制程序实现联动,也可以是在电路内部通过利用机械电连接的方式实现两个切换开关的联动。Specifically, the linkage between the first switch K1 and the second switch K2 can be set, so that when only one of the first switch K1 or the second switch K2 is controlled, the other is linked accordingly, so that the switching The control of the DC switching power supply circuit is further simplified, the delay caused by the asynchronous control of the two switching switches is reduced, and the power supply efficiency is further improved. Specifically, the linkage setting between the first switch K1 and the second switch K2 can be achieved by using a control program inside the circuit, or by using a mechanical and electrical connection in the circuit to achieve the linkage between the two switches.

图3为本发明实施例提供的另一种交直流切换供电电路的结构示意图,如图3所示,可选地,交直流切换供电电路还包括控制器30,控制器30包括第一检测端m1、第二检测端m2、第一输出端r1和第二输出端r2;第一切换开关K1和第二切换开关K2均包括控制端;FIG. 3 is a schematic structural diagram of another AC-DC switching power supply circuit provided by an embodiment of the present invention. As shown in FIG. 3 , optionally, the AC-DC switching power supply circuit further includes a controller 30, and the controller 30 includes a first detection terminal m1, the second detection terminal m2, the first output terminal r1 and the second output terminal r2; the first switch K1 and the second switch K2 both include control terminals;

第一检测端m1与第一触点t1电连接,第一输出端r1与第一切换开关K1的控制端电连接,第二检测端m2与第二触点t2电连接,第二输出端r2与第二切换开关K2的控制端电连接。The first detection terminal m1 is electrically connected to the first contact t1, the first output terminal r1 is electrically connected to the control terminal of the first switch K1, the second detection terminal m2 is electrically connected to the second contact t2, and the second output terminal r2 It is electrically connected to the control terminal of the second switch K2.

控制器30用于在第一检测端m1的第一电压检测信号小于第一阈值电压时,通过第一输出端r1输出第一控制信号以控制第一触点t1与公共触点t的断开,控制第二触点t2与公共触点t连接;以及通过第二输出端r2输出第二控制信号以控制第四触点t4与第三触点t3连接;The controller 30 is configured to output a first control signal through the first output terminal r1 to control the disconnection between the first contact t1 and the common contact t when the first voltage detection signal of the first detection terminal m1 is less than the first threshold voltage , control the second contact t2 to connect with the common contact t; and output the second control signal through the second output terminal r2 to control the fourth contact t4 to connect with the third contact t3;

控制器30还用于在第二检测端m2的第二电压检测信号小于第二阈值电压时,通过第一输出端r1输出第三控制信号以控制第二触点t2与公共触点t的断开,控制第一触点t1与公共触点t连接,以及通过第二输出端r2输出第四控制信号以控制第四触点t4与第三触点t3断开。The controller 30 is further configured to output a third control signal through the first output terminal r1 to control the disconnection between the second contact t2 and the common contact t when the second voltage detection signal at the second detection terminal m2 is less than the second threshold voltage. open, the first contact t1 is controlled to be connected with the common contact t, and the fourth control signal is output through the second output terminal r2 to control the fourth contact t4 to be disconnected from the third contact t3.

具体地,可继续参考图2,在第一切换开关K1和第二切换开关K2没有进行联动设置的情况下。当控制器30通过其第一检测端m1检测到第一切换开关K1的第一触点t1处的第一电压检测信号小于第一阈值电压时,表明此时交流电源输入端A无法正常对负载提供交流电源,控制器30通过第一输出端r1输出第一控制信号以控制第一触点t1与公共触点t断开、控制第二触点t2与公共触点t连接以及通过第二输出端r2输出第二控制信号以控制第二切换开关K2的第四触点t4与第三触点t3连接,以通过直流电源输入端B对负载提供直流电源,保证对负载供电的不断电。Specifically, referring to FIG. 2 , in the case where the first switch K1 and the second switch K2 are not set in linkage. When the controller 30 detects through its first detection terminal m1 that the first voltage detection signal at the first contact t1 of the first switch K1 is smaller than the first threshold voltage, it indicates that the AC power input terminal A cannot normally supply the load at this time. Provide AC power, the controller 30 outputs a first control signal through the first output terminal r1 to control the first contact t1 to be disconnected from the common contact t, the second contact t2 to be connected to the common contact t, and the second output The terminal r2 outputs a second control signal to control the connection between the fourth contact t4 of the second switch K2 and the third contact t3 to provide DC power to the load through the DC power input terminal B to ensure uninterrupted power supply to the load.

当控制器30通过其第二检测端m2检测到第一切换开关K1的第二触点t2处的第二电压信号小于第二阈值电压时,表明此时直流电源输入端B无法正常对负载提供直流电源,控制器30通过第一输出端r1输出第三控制信号以控制第二触点t2与公共触点t的断开、控制第一触点t1与公共触点t连接以及通过第二输出端r2输出第四控制信号以控制第二切换开关K2的第四触点t4与第三触点t3断开,以通过交流电源输入端A对负载提供直流电源,保证对负载供电的不断电。When the controller 30 detects through its second detection terminal m2 that the second voltage signal at the second contact t2 of the first switch K1 is smaller than the second threshold voltage, it indicates that the DC power input terminal B cannot provide the load normally at this time. DC power supply, the controller 30 outputs a third control signal through the first output terminal r1 to control the disconnection of the second contact t2 and the common contact t, control the connection between the first contact t1 and the common contact t, and through the second output The terminal r2 outputs a fourth control signal to control the fourth contact t4 of the second switch K2 to disconnect from the third contact t3, so as to provide DC power to the load through the AC power input terminal A to ensure uninterrupted power supply to the load.

其中,第一阈值电压以及第二阈值电压可以预先设置于控制器30中,例如可以设置第一阈值电压或第二阈值电压为零伏或接近零伏,表明此时第一切换开关K1的第一触点t1或第二触点t2出几乎没有电压而无法正常对负载供电。第一控制信号、第二控制信号、第三控制信号以及第四控制信号可以是串口指令控制信号,也可以是有效高低电平信号。The first threshold voltage and the second threshold voltage may be preset in the controller 30. For example, the first threshold voltage or the second threshold voltage may be set to zero volts or close to zero volts, indicating that the first switching switch K1 at this time A contact t1 or a second contact t2 has almost no voltage and cannot supply power to the load normally. The first control signal, the second control signal, the third control signal and the fourth control signal may be serial port command control signals, or may be valid high and low level signals.

本发明实施例提供的交直流切换电路,在设置有第一切换开关和第二切换开关对同一电路中的交流电源输入端和直流电源输入端进行便捷切换的基础上,设置控制器,控制器对第一切换开关的第一触点和第二触点处的电压进行检测,根据检测结果及时输出相应的控制信号控制第一切换开关和第二切换开关,以高效控制交流电源输入端和直流输入端之间灵活切换,保证对负载高效、可靠且供电不断电的供电效果。The AC-DC switching circuit provided by the embodiment of the present invention is provided with a first switching switch and a second switching switch to conveniently switch the AC power input terminal and the DC power input terminal in the same circuit, and a controller is provided. Detect the voltage at the first contact and the second contact of the first switch, and output the corresponding control signal in time according to the detection result to control the first switch and the second switch, so as to efficiently control the AC power input and the DC Flexible switching between input terminals ensures efficient and reliable power supply to the load and uninterrupted power supply.

图4为本发明实施例提供的另一种交直流切换供电电路的结构示意图,如图4所示,可选地,交直流切换供电电路还包括控制器30,控制器30包括第一检测端m1、第二检测端m2和输出端r;第一切换开关K1包括控制端;FIG. 4 is a schematic structural diagram of another AC-DC switching power supply circuit provided by an embodiment of the present invention. As shown in FIG. 4 , optionally, the AC-DC switching power supply circuit further includes a controller 30, and the controller 30 includes a first detection terminal m1, a second detection terminal m2 and an output terminal r; the first switch K1 includes a control terminal;

第一检测端m1与第一触点t1电连接,第二检测端m2与第二触点t2电连接,输出端r与第一切换开关K1的控制端电连接,控制器30用于在第一检测端m1的第一电压检测信号小于第一阈值电压时,通过输出端r输出第一控制信号以控制第一触点t1与公共触点t的断开,第二触点t2与公共触点t连接;The first detection terminal m1 is electrically connected to the first contact t1, the second detection terminal m2 is electrically connected to the second contact t2, and the output terminal r is electrically connected to the control terminal of the first switch K1. When the first voltage detection signal of a detection terminal m1 is less than the first threshold voltage, a first control signal is output through the output terminal r to control the disconnection between the first contact t1 and the common contact t, and the second contact t2 and the common contact point t connection;

控制器30还用于在第二检测端m2的第二电压检测信号小于第二阈值电压时,通过输出端r输出第二控制信号以控制第一触点t1与公共触点t的连接,第二触点t2与公共触点t断开;The controller 30 is further configured to output a second control signal through the output terminal r to control the connection between the first contact t1 and the common contact t when the second voltage detection signal at the second detection terminal m2 is less than the second threshold voltage, and the first The two contacts t2 are disconnected from the common contact t;

其中,第一触点t1与公共触点t连接时,第三触点t3与第四触点t4断开;第二触点t2与公共触点t连接时,第三触点t3与第四触点t4连接。Wherein, when the first contact t1 is connected with the common contact t, the third contact t3 is disconnected from the fourth contact t4; when the second contact t2 is connected with the common contact t, the third contact t3 is connected with the fourth contact Contact t4 is connected.

具体地,可继续参考图3,在第一切换开关K1和第二切换开关K2有联动设置的情况下。控制器30通过第一检测端m1或第二检测端m2对第一切换开关K1的第一触点t1或第二触点t2处的电压检测之后,可仅通过一个输出端r输出对应的第一控制信号或第二控制信号,控制交流电源输入端A所在回路和直流电源输入端B所在通路的切换,保证对负载不断电供电的同时,降低单独控制时可能存在的不同步问题,提升切换速度,高效供电。Specifically, referring to FIG. 3 , in the case where the first switch K1 and the second switch K2 are set in linkage. After the controller 30 detects the voltage at the first contact t1 or the second contact t2 of the first switch K1 through the first detection terminal m1 or the second detection terminal m2, it can output the corresponding first contact through only one output terminal r. A control signal or a second control signal to control the switching of the circuit where the AC power input terminal A is located and the path where the DC power supply input terminal B is located, ensuring that the load is powered off without interruption, reducing the possible asynchronous problems in separate control, and improving switching Speed, efficient power supply.

基于上述交直流切换供电电路的技术方案,本发明实施例还提供一种交直流供电断路器,该交直流供电断路器包括如上述任一技术方案中的任一交直流切换供电电路,因而能够实现与对应的交直流切换供电电路同样的技术效果,实现了仅通过一个切换电路对交流电源和直流电源的便捷切换,提高了对负载的供电效率以及供电的可靠性。避免了现有技术中对用电设备等负载供电时,需要分别设置交流断路器和直流断路器进行交流电源和直流电源的切换供电,最终电路设计繁琐杂,本发明实施例提供的具有切换功能的断路器,仅需一个断路器即可对供电设备实现交流电源和直流电源的切换供电,简便可靠,供电高效,成本偏低。Based on the above technical solution of the AC-DC switching power supply circuit, the embodiment of the present invention further provides an AC-DC power supply circuit breaker, the AC-DC power supply circuit breaker includes any of the AC-DC switching power supply circuits in any of the above technical solutions, and thus can It achieves the same technical effect as the corresponding AC-DC switching power supply circuit, realizes the convenient switching of the AC power supply and the DC power supply through only one switching circuit, and improves the power supply efficiency to the load and the reliability of the power supply. It avoids that when supplying power to loads such as electrical equipment in the prior art, an AC circuit breaker and a DC circuit breaker need to be set up to switch the AC power supply and the DC power supply. The final circuit design is complicated and complicated, and the embodiment of the present invention provides a switching function. It only needs one circuit breaker to switch the AC power supply and the DC power supply to the power supply equipment, which is simple and reliable, the power supply is efficient, and the cost is low.

本发明实施例还提供一种交直流切换供电方法,应用于如上述任意实施例提供的交直流切换供电电路,图5为本发明实施例提供的一种交直流切换供电方法流程图,如图5所示,该交直流切换供电方法包括:An embodiment of the present invention further provides an AC-DC switching power supply method, which is applied to the AC-DC switching power supply circuit provided in any of the above-mentioned embodiments. FIG. 5 is a flowchart of an AC-DC switching power supply method provided by an embodiment of the present invention, as shown in FIG. 5, the AC-DC switching power supply method includes:

S100,在控制交流电源输入端与第一端导通时,控制第四端与第二端之间断开;以及在控制第三端与第一端导通时,控制第四端与第二端导通。S100, when the AC power input terminal is controlled to be connected to the first terminal, the fourth terminal is controlled to be disconnected from the second terminal; and when the third terminal is controlled to be connected to the first terminal, the fourth terminal is controlled to be connected to the second terminal. on.

具体地,可参考图1,当需要向负载提供交流电源或者无法通过直流电源输入端B对负载供电时,闭合供电开关,控制交流电源输入端A与供电开关K的第一端q1之间导通、灭弧电路20的第三端q3与供电开关K的第一端q1之间断开以及灭弧电路20的第四端q4与供电开关K的第二端q2之间断开。以此使得交流电源输入端A、供电开关K以及电源输出端C之间形成一通路,交流电源通过交流电源输入端K以及电源输出端C为负载提供交流电源。Specifically, referring to FIG. 1 , when AC power needs to be provided to the load or the load cannot be powered through the DC power input terminal B, the power supply switch is closed to control the conduction between the AC power input terminal A and the first terminal q1 of the power supply switch K. The connection between the third end q3 of the arc extinguishing circuit 20 and the first end q1 of the power supply switch K is disconnected, and the fourth end q4 of the arc extinguishing circuit 20 and the second end q2 of the power supply switch K are disconnected. In this way, a path is formed between the AC power input terminal A, the power supply switch K and the power supply output terminal C, and the AC power supply provides AC power to the load through the AC power input terminal K and the power supply output terminal C.

当需要向负载提供直流电源或者无法通过交流电源输入端A对负载供电时,闭合供电开关K,控制交流电源输入端A与供电开关K的第一端q1之间断开、灭弧电路20的第三端q3与供电开关K的第一端q1之间导通以及灭弧电路20的第四端q4与供电开关K的第二端q2之间导通。以此使得直流电源输入端B、供电开关K以及电源输出端C之间形成一通路,直流电源通过直流电源输入端B以及电源输出端C为负载提供交流电源。When it is necessary to provide DC power to the load or the load cannot be powered through the AC power input terminal A, the power supply switch K is closed to control the disconnection between the AC power input terminal A and the first terminal q1 of the power supply switch K, and the first terminal q1 of the arc extinguishing circuit 20 is controlled. The connection between the third terminal q3 and the first terminal q1 of the power supply switch K and the conduction between the fourth terminal q4 of the arc extinguishing circuit 20 and the second terminal q2 of the power supply switch K are conducted. In this way, a path is formed between the DC power input terminal B, the power supply switch K and the power output terminal C, and the DC power supply provides the load with AC power through the DC power input terminal B and the power output terminal C.

可参考图3,可选地,交直流切换供电电路还包括控制器30,控制器30包括第一检测端m1、第二检测端m2、第一输出端r1和第二输出端r2;第一切换开关K1和第二切换开关K2均包括控制端;第一检测端m1与第一触点t1电连接,第一输出端r1与第一切换开关K1的控制端电连接,第二检测端m2与第二触点t2电连接,第二输出端r2与第二切换开关K2的控制端电连接;Referring to FIG. 3 , optionally, the AC/DC switching power supply circuit further includes a controller 30, and the controller 30 includes a first detection terminal m1, a second detection terminal m2, a first output terminal r1 and a second output terminal r2; The switch K1 and the second switch K2 both include control terminals; the first detection terminal m1 is electrically connected to the first contact t1, the first output terminal r1 is electrically connected to the control terminal of the first switch K1, and the second detection terminal m2 is electrically connected to the second contact t2, and the second output terminal r2 is electrically connected to the control terminal of the second switch K2;

在控制交流电源输入端与第一端q1导通时,控制第四端q4与第二端q2之间断开;以及在控制第三端q3与第一端q1导通时,控制第四端q4与第二端q2导通,包括:When the AC power input terminal is controlled to be turned on with the first terminal q1, the fourth terminal q4 is controlled to be disconnected from the second terminal q2; and when the third terminal q3 is controlled to be turned on with the first terminal q1, the fourth terminal q4 is controlled Conduction with the second terminal q2, including:

控制器30在第一检测端m1的第一电压检测信号小于第一阈值电压时,通过第一输出端r1输出第一控制信号以控制第一触点t1与公共触点t的断开,控制第二触点t2与公共触点t连接;以及通过第二输出端r2输出第二控制信号以控制第四触点t4与第三触点t3连接;When the first voltage detection signal of the first detection terminal m1 is smaller than the first threshold voltage, the controller 30 outputs a first control signal through the first output terminal r1 to control the disconnection between the first contact t1 and the common contact t, and control the The second contact t2 is connected with the common contact t; and the second control signal is output through the second output terminal r2 to control the connection between the fourth contact t4 and the third contact t3;

控制器30在第二检测端m2的第二电压检测信号小于第二阈值电压时,通过第一输出端r1输出第三控制信号以控制第二触点t2与公共触点t的断开,控制第一触点t1与公共触点t连接,以及通过第二输出端r2输出第四控制信号以控制第四触点t4与第三触点t3连接。When the second voltage detection signal of the second detection terminal m2 is smaller than the second threshold voltage, the controller 30 outputs a third control signal through the first output terminal r1 to control the disconnection between the second contact t2 and the common contact t, and control the The first contact t1 is connected with the common contact t, and a fourth control signal is output through the second output terminal r2 to control the fourth contact t4 to be connected with the third contact t3.

可参考图4,可选地,交直流切换供电电路还包括控制器30,控制器30包括第一检测端m1、第二检测端m2和输出端r;第一切换开关K1包括控制端;第一检测端m1与第一触点t1电连接,第二检测端m2与第二触点t2电连接,输出端r与第一切换开关K1的控制端电连接;第一切换开关K1和第二切换开关K2为机械联动开关;Referring to FIG. 4, optionally, the AC-DC switching power supply circuit further includes a controller 30, the controller 30 includes a first detection terminal m1, a second detection terminal m2 and an output terminal r; the first switch K1 includes a control terminal; A detection terminal m1 is electrically connected to the first contact t1, the second detection terminal m2 is electrically connected to the second contact t2, and the output terminal r is electrically connected to the control terminal of the first switch K1; the first switch K1 and the second switch K1 are electrically connected to The switch K2 is a mechanical linkage switch;

在控制交流电源输入端与第一端q1导通时,控制第四端q4与第二端q2之间断开;以及在控制第三端q3与第一端q1导通时,控制第四端q4与第二端q2导通,包括:When the AC power input terminal is controlled to be turned on with the first terminal q1, the fourth terminal q4 is controlled to be disconnected from the second terminal q2; and when the third terminal q3 is controlled to be turned on with the first terminal q1, the fourth terminal q4 is controlled Conduction with the second terminal q2, including:

控制器30在第一检测端m1的第一电压检测信号小于第一阈值电压时,通过输出端r输出第一控制信号以控制第一触点t1与公共触点t的断开,第二触点t2与公共触点t连接;When the first voltage detection signal of the first detection terminal m1 is less than the first threshold voltage, the controller 30 outputs a first control signal through the output terminal r to control the disconnection of the first contact t1 and the common contact t, and the second contact The point t2 is connected with the common contact t;

控制器30在第二检测端m2的第二电压检测信号小于第二阈值电压时,通过输出端输出r第二控制信号以控制第一触点t1与公共触点t的连接,第二触点t2与公共触点t断开;When the second voltage detection signal of the second detection terminal m2 is smaller than the second threshold voltage, the controller 30 outputs a second control signal r through the output terminal to control the connection between the first contact t1 and the common contact t, and the second contact t2 is disconnected from the common contact t;

其中,第一触点t1与公共触点t连接时,第三触点t3与第四触点t4断开;第二触点t2与公共触点t连接时,第三触点t3与第四触点t4连接。Wherein, when the first contact t1 is connected with the common contact t, the third contact t3 is disconnected from the fourth contact t4; when the second contact t2 is connected with the common contact t, the third contact t3 is connected with the fourth contact Contact t4 is connected.

综上所述,本发明实施例提供的交直流且切换供电方法,应用于如上述实施例一种任一交直流切换供电电路,能够实现如交直流切换供电电路相同的技术效果,解决了现有的对负载提供交流和直流电源时需要单独设置控制电路,即单独设置两个直流和交流电源的电路而带来的电路繁琐性以及供电的低效性,实现了仅通过一个电路对负载提供交流和直流电源时的便捷切换,提高了对负载的供电效率以及供电的可靠性。To sum up, the AC-DC switching power supply method provided by the embodiment of the present invention can be applied to any AC-DC switching power supply circuit as in the above-mentioned embodiment, and can achieve the same technical effect as the AC-DC switching power supply circuit, and solve the problem of the current situation. Some control circuits need to be set up separately when providing AC and DC power to the load, that is, the circuit is cumbersome and the power supply is inefficient due to the separate setting of two DC and AC power circuits. The convenient switching between AC and DC power supplies improves the power supply efficiency to the load and the reliability of the power supply.

注意,上述仅为本发明的较佳实施例及所运用技术原理。本领域技术人员会理解,本发明不限于这里所述的特定实施例,对本领域技术人员来说能够进行各种明显的变化、重新调整和替代而不会脱离本发明的保护范围。因此,虽然通过以上实施例对本发明进行了较为详细的说明,但是本发明不仅仅限于以上实施例,在不脱离本发明构思的情况下,还可以包括更多其他等效实施例,而本发明的范围由所附的权利要求范围决定。Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope is determined by the scope of the appended claims.

Claims (10)

1. An AC/DC switching power supply circuit, comprising: the arc extinguishing device comprises a switching circuit, a power supply switch, an arc extinguishing circuit, an alternating current power supply input end, a direct current power supply input end and a power supply output end, wherein the power supply output end is used for being connected with a load;
the power supply switch comprises a first end and a second end, and the second end is electrically connected with the power supply output end;
the arc extinguishing circuit comprises a third end and a fourth end, and the third end is electrically connected with the input end of the direct current power supply;
the switching circuit is electrically connected with the alternating current power supply input end, the first end, the second end, the third end and the fourth end respectively, and is used for controlling the conduction state between the alternating current power supply input end and the first end, the conduction state between the third end and the first end and the conduction state between the fourth end and the second end; when the input end of the alternating current power supply is controlled to be connected with the first end, the fourth end and the second end are controlled to be disconnected; and when the third end is controlled to be conducted with the first end, the fourth end is controlled to be conducted with the second end.
2. The ac-dc switched-supply circuit according to claim 1, wherein the switching circuit comprises a first switch and a second switch;
the first change-over switch comprises a first contact, a second contact and a common contact, and the second change-over switch comprises a third contact and a fourth contact;
the first contact is electrically connected with the input end of the alternating current power supply, the second contact is electrically connected with the third end of the arc extinguishing circuit, and the common contact is electrically connected with the first end of the power supply switch; the third contact is electrically connected with the fourth end of the arc extinguishing circuit, and the fourth contact is connected with the second end of the power supply switch.
3. The ac-dc switching power supply circuit according to claim 2, wherein the first switch and the second switch are mechanical ganged switches.
4. The ac-dc switching power supply circuit according to claim 2, further comprising a controller, wherein the controller comprises a first detection terminal, a second detection terminal, a first output terminal, and a second output terminal; the first change-over switch and the second change-over switch comprise control ends;
the first detection end is electrically connected with the first contact, the first output end is electrically connected with the control end of the first change-over switch, the second detection end is electrically connected with the second contact, and the second output end is electrically connected with the control end of the second change-over switch.
The controller is used for outputting a first control signal through the first output end to control the disconnection of the first contact and the common contact and control the connection of the second contact and the common contact when a first voltage detection signal of the first detection end is smaller than a first threshold voltage; and outputting a second control signal through the second output terminal to control the fourth contact to be connected with the third contact;
the controller is further configured to output a third control signal through the first output terminal to control the second contact to be disconnected from the common contact, control the first contact to be connected to the common contact, and output a fourth control signal through the second output terminal to control the fourth contact to be disconnected from the third contact when a second voltage detection signal of the second detection terminal is smaller than a second threshold voltage.
5. The AC-DC switching power supply circuit according to claim 3, further comprising a controller, wherein the controller comprises a first detection terminal, a second detection terminal and an output terminal; the first switch comprises a control end;
the first detection end is electrically connected with the first contact, the second detection end is electrically connected with the second contact, the output end is electrically connected with the control end of the first change-over switch, the controller is used for outputting a first control signal through the output end to control the disconnection of the first contact and the common contact when a first voltage detection signal of the first detection end is smaller than a first threshold voltage, and the second contact is connected with the common contact;
the controller is further configured to output a second control signal through the output terminal to control connection between the first contact and the common contact when a second voltage detection signal of the second detection terminal is smaller than a second threshold voltage, and the second contact is disconnected from the common contact;
wherein the third contact is disconnected from the fourth contact when the first contact is connected to the common contact; and when the second contact is connected with the common contact, the third contact is connected with the fourth contact.
6. The switched supply circuit of claim 1, wherein the arc quenching circuit comprises an absorption circuit and a coupled negative circuit; the absorption circuit and the coupling negative voltage circuit are connected in parallel.
7. An ac/dc switching power supply method applied to the ac/dc switching power supply circuit according to any one of claims 1 to 6, the ac/dc switching power supply method comprising:
when the input end of the alternating current power supply is controlled to be connected with the first end, the fourth end and the second end are controlled to be disconnected; and when the third end is controlled to be conducted with the first end, the fourth end is controlled to be conducted with the second end.
8. The ac-dc switching power supply method according to claim 7, wherein the ac-dc switching power supply circuit further comprises a controller, the controller comprising a first detection terminal, a second detection terminal, a first output terminal, and a second output terminal; the first change-over switch and the second change-over switch comprise control ends; the first detection end is electrically connected with the first contact, the first output end is electrically connected with the control end of the first change-over switch, the second detection end is electrically connected with the second contact, and the second output end is electrically connected with the control end of the second change-over switch;
when the input end of the alternating current power supply is controlled to be connected with the first end, the fourth end and the second end are controlled to be disconnected; and when controlling the third terminal to be conducted with the first terminal, controlling the fourth terminal to be conducted with the second terminal, including:
when a first voltage detection signal of the first detection end is smaller than a first threshold voltage, the controller outputs a first control signal through the first output end to control the disconnection of the first contact and the common contact and control the connection of the second contact and the common contact; and outputting a second control signal through the second output terminal to control the fourth contact to be connected with the third contact;
when a second voltage detection signal of the second detection end is smaller than a second threshold voltage, the controller outputs a third control signal through the first output end to control the disconnection of the second contact and the common contact, control the connection of the first contact and the common contact, and outputs a fourth control signal through the second output end to control the connection of the fourth contact and the third contact.
9. The ac-dc switching power supply method according to claim 7, wherein the ac-dc switching power supply circuit further comprises a controller, the controller comprising a first detection terminal, a second detection terminal, and an output terminal; the first switch comprises a control end; the first detection end is electrically connected with the first contact, the second detection end is electrically connected with the second contact, and the output end is electrically connected with the control end of the first change-over switch; the first change-over switch and the second change-over switch are mechanical linkage switches;
when the input end of the alternating current power supply is controlled to be connected with the first end, the fourth end and the second end are controlled to be disconnected; and when controlling the third terminal to be conducted with the first terminal, controlling the fourth terminal to be conducted with the second terminal, including:
when a first voltage detection signal of the first detection end is smaller than a first threshold voltage, the controller outputs a first control signal through the output end to control the disconnection of the first contact and the common contact, and the second contact is connected with the common contact;
when a second voltage detection signal of the second detection end is smaller than a second threshold voltage, the controller outputs a second control signal through the output end to control the connection between the first contact and the common contact, and the second contact is disconnected with the common contact;
wherein the third contact is disconnected from the fourth contact when the first contact is connected to the common contact; and when the second contact is connected with the common contact, the third contact is connected with the fourth contact.
10. A circuit breaker for AC/DC power supply, comprising a circuit for AC/DC switched power supply according to any one of claims 1 to 6.
CN202010362390.2A 2020-04-30 2020-04-30 An AC-DC switching power supply circuit, method and circuit breaker Pending CN111525675A (en)

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