CN220692876U

CN220692876U - Plug-in power supply circuit and power supply system

Info

Publication number: CN220692876U
Application number: CN202322194185.1U
Authority: CN
Inventors: 蒋友锡; 肖海鹏
Original assignee: Leedarson Lighting Co Ltd
Current assignee: Leedarson Lighting Co Ltd
Priority date: 2023-08-15
Filing date: 2023-08-15
Publication date: 2024-03-29
Anticipated expiration: 2033-08-15

Abstract

The utility model belongs to the technical field of power supply, a plug-in power supply circuit, a power supply system is provided, the live wire end of first port is connected by the input of first unidirectional conduction circuit, the input of AC-DC circuit is connected to the output of first unidirectional conduction circuit, the live wire end of second port is connected to the input of second unidirectional conduction circuit, the input of AC-DC circuit is connected to the output of second unidirectional conduction circuit, switch circuit connects between the live wire end of first port and the live wire end of second port, and switch on or switch off according to the switching control signal who receives, with the connected state between the live wire end of control first port and the live wire end of second port, realize the two-way circular telegram control between first port and the second port, and when switch circuit breaks off, no matter from which one port input of commercial power, the normal power of its inside control circuit can all be realized, the user can install the use according to actual wiring and socket, the advantage that has simply, convenience, practicality.

Description

Plug-in power supply circuit and power supply system

Technical Field

The application belongs to the technical field of power supply, and particularly relates to a plug-in power supply circuit and a power supply system.

Background

At present, intelligent PLUG-in (PLUG) circuits in the market can only supply power in one direction, namely when a switch circuit is disconnected, PLUG equipment can only supply power by being input by a pin terminal when the PLUG equipment is connected with mains supply; if the utility power supply end is input by the PLUG bush end, the PLUG cannot be controlled normally, so that the PLUG can also control the work normally when the utility power is input from the PLUG bush cannot be realized.

For example, with the development of the photovoltaic industry, in order to achieve intelligent switching between photovoltaic and utility, PLUG circuits would be an important bridge for intelligent conversion between them, and would be connected between a solar inverter and a home application or public power grid. Because the design of the existing PLUG internal control circuit only has one-way power taking function, if the solar inverter end does not output electric energy, namely the pin power supply input end of the PLUG does not input electric energy, the problem that the PLUG cannot control the work again can be caused after the PLUG switch is disconnected.

Disclosure of Invention

The purpose of the application is to provide a plug-in power supply circuit and a power supply system, which can solve the problems of high cost and complex structure of a control mode in the prior color temperature adjusting scheme.

A first aspect of the present embodiments provides a plug-in power supply circuit, including:

a first port;

a second port;

the AC-DC circuit is used for converting the accessed alternating current into direct current;

the input end of the first unidirectional conduction circuit is connected with the live wire end of the first port, and the output end of the first unidirectional conduction circuit is connected with the input end of the AC-DC circuit;

the input end of the second unidirectional conduction circuit is connected with the live wire end of the second port, and the output end of the second unidirectional conduction circuit is connected with the input end of the AC-DC circuit;

the switch circuit is connected between the live wire end of the first port and the live wire end of the second port and is turned on or off according to the received switch control signal so as to control the connection state between the live wire end of the first port and the live wire end of the second port;

and the zero line end of the first port is commonly connected with the zero line end of the second port.

In one embodiment, the first port further comprises a ground terminal and the second port further comprises a ground terminal; the ground terminal of the first port is connected with the ground terminal of the second port.

In one embodiment, the switching circuit includes:

the switch driving module is used for receiving the switch control signal and generating a switch driving signal according to the switch control signal;

the switch module is connected with the switch driving module, the first port and the second port, and is used for receiving the switch driving signal and switching on or switching off according to the switch driving signal so as to control the connection state between the live wire end of the first port and the live wire end of the second port.

In one embodiment, the switch module is a relay.

In one embodiment, the switch driving module includes: the first resistor, the second resistor, the third resistor, the first capacitor, the first diode and the first switch tube;

the cathode of the first diode and the first end of the contact set of the relay are commonly connected to a direct current power supply end, the first end of the first switch tube, the anode of the first diode are commonly connected to the second end of the contact set of the relay, the control end of the first switch tube, the first end of the first resistor, the first end of the second resistor, the first end of the first capacitor and the first end of the third resistor are commonly connected, the second end of the first resistor is connected with a main control power supply end, the second end of the first switch tube, the second end of the second resistor and the second end of the first capacitor are commonly connected to the ground, and the second end of the third resistor is connected with a control circuit.

In one embodiment, the first unidirectional conducting circuit and the second unidirectional conducting circuit are rectifying circuits.

In one embodiment, the plug-in power supply circuit further comprises:

and the DC-DC circuit is connected with the AC-DC circuit and is used for receiving the direct current and performing voltage conversion on the direct current to generate a power supply signal.

In one embodiment, the plug-in power supply circuit further comprises:

the key circuit is used for generating a key switch signal according to user operation;

and the control circuit is used for receiving the key switch signal, generating the switch control signal according to the key switch signal and outputting the switch control signal to the switch circuit.

In one embodiment, the plug-in power supply circuit further comprises:

the indicating circuit is connected with the control circuit and used for indicating the working state of the circuit according to the switch control signal;

the current acquisition circuit is connected with the control circuit and is used for acquiring the current flowing through the first port and the second port, generating a current detection signal and outputting the current detection signal to the control circuit;

and the energy consumption metering circuit is connected with the first port, the second port and the control circuit and is used for collecting current and voltage of the mains supply input by the first port or the second port, generating at least one of apparent power, active power, power factors and electric quantity statistical parameters according to the current and the voltage and outputting the at least one of the apparent power, the active power, the power factors and the electric quantity statistical parameters to the control circuit.

The second aspect of the embodiment of the present application further provides a power supply system, including: a plug-in power supply circuit as claimed in any one of the preceding claims.

The beneficial effects of the embodiment of the application are that: the input end of the first unidirectional conduction circuit is connected with the live wire end of the first port, the output end of the first unidirectional conduction circuit is connected with the input end of the AC-DC circuit, the input end of the second unidirectional conduction circuit is connected with the live wire end of the second port, the output end of the second unidirectional conduction circuit is connected with the input end of the AC-DC circuit, the switch circuit is connected between the live wire end of the first port and the live wire end of the second port and is turned on or off according to a received switch control signal so as to control the connection state between the live wire end of the first port and the live wire end of the second port, bidirectional power control between the first port and the second port is realized, and when the switch circuit is turned off, normal power supply of a control circuit in the switch circuit can be realized no matter from which port is input, and a user can install and use according to actual wiring and a socket.

Drawings

Fig. 1 is a schematic diagram of a plug-in power supply circuit according to an embodiment of the present application;

fig. 2 is a schematic diagram two of a plug-in power supply circuit according to an embodiment of the present application;

fig. 3 is a schematic diagram III of a plug-in power supply circuit according to an embodiment of the present application;

fig. 4 is a schematic diagram of a plug-in power supply circuit according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram fifth of a plug-in power supply circuit according to an embodiment of the present application;

fig. 6 is a schematic diagram of a control circuit, an indication circuit and a key circuit according to an embodiment of the present application.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The embodiment of the application provides a plug-in power supply circuit, referring to fig. 1, the plug-in power supply circuit includes: the first port 110, the second port 120, the AC-DC circuit 300, the first unidirectional conductive circuit 210, the second unidirectional conductive circuit 220.

In this embodiment, the AC-DC circuit 300 is used to convert the AC power that is supplied to the DC power that may be used to power a subsequent stage circuit (e.g., the control circuit 610). The input end of the first unidirectional conduction circuit 210 is connected with the live wire end L1 of the first port 110, the output end of the first unidirectional conduction circuit 210 is connected with the input end of the AC-DC circuit 300, the input end of the second unidirectional conduction circuit 220 is connected with the live wire end L2 of the second port 120, and the output end of the second unidirectional conduction circuit 220 is connected with the input end of the AC-DC circuit 300; the switch circuit 400 is connected between the live end L1 of the first port 110 and the live end L2 of the second port 120, and is turned on or off according to the received switch control signal, so as to control the connection state between the live end L1 of the first port 110 and the live end L2 of the second port 120; the neutral end N1 of the first port 110 is commonly connected to the neutral end N2 of the second port 120.

In this embodiment, by connecting the switch circuit 400 between the live end L1 of the first port 110 and the live end L2 of the second port 120, the switch circuit 400 is turned on or off according to the received switch control signal, so as to control the connection state between the live end L1 of the first port 110 and the live end L2 of the second port 120, thereby realizing bidirectional power control between the first port 110 and the second port 120, and when the switch circuit 400 is turned off, normal power supply of the control circuit 610 inside the switch circuit can be realized no matter from which port the utility power is input, and the user can install and use the switch circuit according to the actual wiring and the socket.

In one embodiment, referring to fig. 2, the first port 110 further includes a ground terminal, and the second port 120 further includes a ground terminal; the ground PE1 of the first port 110 is connected to the ground PE2 of the second port 120.

In one embodiment, the first port 110 may be a pin and the second port 120 may be a socket, and the associated control circuit 610 within the PLUG may be controlled to normally supply power regardless of which end (pin or socket) the utility is input from.

In this embodiment, the utility power input of the AC-DC circuit 300 can be optimized and improved, and the PLUG socket end utility power input is added based on the original PLUG socket end utility power input, so that when the switch circuit 400 is disconnected, no matter which end (PLUG socket or PLUG socket) of the PLUG circuit is input by the utility power, the relevant control circuit 610 in the PLUG circuit can normally supply power for control, and the user does not need to consider which end as the utility power input end when actually installing and applying, so that the PLUG socket can be installed and used according to actual wiring and sockets, and is simple and convenient.

In one embodiment, referring to fig. 3, a switching circuit 400 includes a switch driving module 410 and a switching module 420.

The switch driving module 410 is configured to receive the switch control signal and generate a switch driving signal according to the switch control signal; the switch module 420 is connected to the switch driving module 410, the first port 110 and the second port 120, and the switch module 420 is configured to receive a switch driving signal, and switch on or off according to the switch driving signal, so as to control a connection state between the live wire end L1 of the first port 110 and the live wire end L2 of the second port 120.

In this embodiment, the switch driving module 410 performs conversion processing on the switch control signal, converts the switch control signal into a switch driving signal in a high-low level form, and outputs the switch driving signal to the switch module 420, and the switch module 420 is turned on or off based on the switch driving signal, so that the connection state between the live wire end L1 of the first port 110 and the live wire end L2 of the second port 120 is controlled by the switch state thereof.

In one embodiment, referring to fig. 4, the plug-in power supply circuit in this embodiment further includes a DC-DC circuit 500, where the DC-DC circuit 500 is connected to the AC-DC circuit 300, and the DC-DC circuit 500 is configured to receive direct current and perform voltage conversion on the direct current to generate a power supply signal.

In this embodiment, the DC-DC circuit 500 performs voltage conversion on the DC power output from the output terminal of the AC-DC circuit 300, and the converted voltage can be used to adapt to the control circuit 610 to supply power to the control circuit 610.

In one embodiment, referring to fig. 4, the plug-in power supply circuit further includes a key circuit 620, a control circuit 610.

In this embodiment, the key circuit 620 is configured to generate a key switch signal according to a user operation, where the key switch signal corresponds to the switch control signal.

In one embodiment, the key circuitry 620 may be comprised of any of a toggle switch, a stand alone key, or a matrix key.

In an actual application circuit, the key circuit 620 may also generate a reset signal and output the reset signal to the control circuit 610, and the control circuit 610 performs a reset process according to the reset signal.

The control circuit 610, the key circuit 620 and the switch circuit 400, the control circuit 610 is configured to receive the key switch signal, and generate a switch control signal according to the key switch signal to output to the switch circuit 400.

For example, the key switch signal may be a high-low level signal, and when the key switch signal is a high level signal, the control circuit 610 generates a corresponding switch control signal to control the switch circuit 400 to be turned on, and when the key-on signal is a low level signal, the control circuit 610 generates a corresponding switch control signal to control the switch circuit 400 to be turned off.

In one embodiment, referring to fig. 4, the plug-in power supply circuit further includes an indication circuit 630, a current acquisition circuit 640, and an energy consumption meter circuit 650.

The indication circuit 630 is connected with the control circuit 610, and the indication circuit 630 is used for indicating the working state of the circuit 630 according to the switch control signal; the current collection circuit 640 is connected to the control circuit 610, and the current collection circuit 640 is configured to collect the currents flowing through the first port 110 and the second port 120, generate a current detection signal, and output the current detection signal to the control circuit 610; the energy consumption metering circuit 650 is connected to the first port 110, the second port 120, and the control circuit 610, and the energy consumption metering circuit 650 is configured to collect current and voltage of the mains supply input by the first port 110 or the second port 120, and generate at least one of apparent power, active power, power factor, and electric quantity statistics parameter according to the current and voltage, and output the at least one of apparent power, active power, power factor, and electric quantity statistics parameter to the control circuit 610.

In this embodiment, the indication circuit 630 may be used to indicate the device operating state (e.g., the operating state of the PLUG circuit) and the network access configuration state. The current collection circuit 640 is mainly used for sampling the current input by the PLUG in real time, and the current collection circuit 640 can be connected to a live wire or a zero wire. The energy consumption metering circuit 650 is mainly used for collecting the current and the voltage input by the first port 110 or the second port 120 in real time, calculating at least one of apparent power, active power, power factor and electric quantity statistical parameter according to the current and the voltage, and transmitting the at least one of apparent power, active power, power factor and electric quantity statistical parameter to the control circuit 610 in real time, and further uploading the at least one of apparent power, active power, power factor and electric quantity statistical parameter to an upper computer through a wireless communication circuit.

In one embodiment, referring to FIG. 5, the switch module 420 is a relay K1.

In one embodiment, referring to fig. 5, the switch driving module 410 includes: the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, the first diode D1 and the first switching tube Q1.

The cathode of the first diode D1 is commonly connected to the dc power supply end VDD with the first end of the contact set of the relay K1, the first end of the first switching tube Q1 and the anode of the first diode D1 are commonly connected to the second end of the contact set of the relay K1, the control end of the first switching tube Q1, the first end of the first resistor R1, the first end of the second resistor R2, the first end of the first capacitor C1 and the first end of the third resistor R3 are commonly connected, the second end of the first resistor R1 is connected to the main control power supply end VCC, the second end of the first switching tube Q1, the second end of the second resistor R2 and the second end of the first capacitor C1 are commonly connected to the ground, and the second end of the third resistor R3 is connected to the control circuit 610.

In this embodiment, the first resistor R1, the second resistor R2, the third resistor R3, and the first capacitor C1 form a voltage division filter circuit, and voltage division processing and filtering processing are performed on an input signal. The second end of the third resistor R3 is connected to the ON/OFF switch control signal end of the control circuit 610, when the ON/OFF switch control signal of the control circuit 610 is at a high level, the first switch tube Q1 is turned ON, the coil of the relay K1 is powered ON, the contact set of the relay K1 is turned OFF, the live wire end L1 of the first port 110 and the live wire end L2 of the second port 120 are closed, when the ON/OFF switch control signal of the control circuit 610 is at a low level, the first switch tube Q1 is turned OFF, the coil of the relay K1 is powered OFF, the contact set of the relay K1 is turned OFF, and the live wire end L1 of the first port 110 and the live wire end L2 of the second port 120 are disconnected.

In one embodiment, the first switching transistor Q1 may be an NPN transistor or a MOSFET.

In one embodiment, the first unidirectional conductive circuit 210 and the second unidirectional conductive circuit 220 are rectifier circuits.

In one embodiment, referring to fig. 5, the first unidirectional conduction circuit 210 includes a second diode D2, an anode of the second diode D2 is connected to the live terminal L1 of the first port 110, and a cathode of the second diode D2 is connected to the input terminal of the AC-DC circuit 300.

In one embodiment, referring to fig. 5, the second unidirectional conduction circuit 220 includes a third diode D3, an anode of the third diode D3 is connected to the live terminal L2 of the second port 120, and a cathode of the third diode D3 is connected to the input terminal of the AC-DC circuit 300.

In one embodiment, as shown in connection with fig. 5, the cathode of the second diode D2 is commonly connected with the cathode of the third diode D3, and a dump resistor F1 is further connected in series between the common connection point and the input terminal of the AC-DC circuit 300.

The fuse resistor F1 may prevent the input current from flowing, and the fuse resistor F1 may be a fuse for fusing when the flowing current flows.

In one embodiment, referring to FIG. 5, an AC-DC circuit 300 includes: the first inductor L1, the twenty-first resistor R21, the twenty-second resistor R22, the twenty-third resistor R23, the eleventh capacitor C11, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fourth diode D4, the fifth diode D5, the second inductor L2, and the first power management chip U1.

In this embodiment, the first end of the first inductor L1, the first end of the eleventh capacitor C11, and the first end of the twenty-first resistor R21 are commonly connected to the output end of the first unidirectional conductive circuit 210, and the second end of the first inductor L1, the second end of the twenty-first resistor R21, the first end of the second capacitor C2, and the output pin D of the first power management chip U1 are commonly connected.

The power input pin VCC of the first power management chip U1, the first end of the third capacitor C3, and the cathode of the fifth diode D5 are commonly connected, the selection pin SEL of the first power management chip U1, the ground pin GND of the first power management chip U1, the second end of the third capacitor C3, the first end of the twenty-second resistor R22, the cathode of the fourth diode D4, and the first end of the second inductor L2 are commonly connected, the current detection pin CS of the first power management chip U1 is connected to the second end of the twenty-second resistor R22, the second end of the second inductor L2, the first end of the twenty-third resistor R23, the anode of the fifth diode D5, and the first end of the fourth capacitor C4 are commonly connected as the output terminal of the AC-DC circuit 300, and the second end of the twenty-third resistor R23, the anode of the fourth diode D4, and the second end of the fourth capacitor C4 are commonly connected to ground.

In this embodiment, the output terminal of the AC-DC circuit 300 may serve as the DC power supply terminal VDD to supply power to the coil of the relay K1.

In one embodiment, referring to FIG. 5, a DC-DC circuit 500 includes: the second power management chip U2, the fourth resistor R4, the fifth resistor R5, the fifth capacitor C5 and the sixth capacitor C6.

The input pin VIN of the second power management chip U2 and the first end of the fourth resistor R4 are commonly connected to the output end of the AC-DC circuit 300, the capacitor pin CB of the second power management chip U2, the second end of the fourth resistor R4 and the first end of the fifth resistor R5 are commonly connected, the ground pin GND of the second power management chip U2, the second end of the fifth resistor R5, the first end of the fifth capacitor C5 and the first end of the sixth capacitor C6 are commonly connected to ground, the output pin VO of the second power management chip U2, the second end of the fifth capacitor C5 and the second end of the sixth capacitor C6 are commonly connected to the output end of the DC-DC circuit 500, and the output end of the DC-DC circuit 500 can be used as the main control power supply end VCC.

In one embodiment, the control circuit 610 may be a circuit formed by the main control chip U3 and its peripheral devices.

In one embodiment, referring to fig. 6, the control circuit 610 includes a main control chip U3, a seventh resistor R7, a sixth resistor R6, and a seventh capacitor C7.

The first end of the seventh resistor R7 is connected with the main control power supply end VCC, the second end of the seventh resistor R7, the first end of the sixth resistor R6 and the first end of the seventh capacitor C7 are commonly connected with the temperature sensing pin NTC of the main control chip U3, the second end of the sixth resistor R6 and the second end of the seventh capacitor C7 are commonly connected with the ground, and the antenna pin RF of the main control chip U3 is connected with an antenna.

In this embodiment, at least one of the sixth resistor R6 and the seventh resistor R7 is a thermistor, and the temperature of the plug-in power supply circuit is detected by the sixth resistor R6 and the seventh resistor R7, and the detected temperature signal is converted into a voltage and output to the main control chip U3.

The switch control output pin of the main control chip U3 is connected with the switch circuit 400 in an ON/OFF mode. The main control chip U3 can control the level of the ON/OFF of the switch control output pin according to the voltage signal of the temperature sensing pin NTC, so that the problem of potential safety hazard caused by power supply of a circuit under the condition of higher temperature is avoided.

In one embodiment, referring to fig. 6, the indication circuit 630 includes an eighth resistor R8 and a light emitting diode LED.

The first end of the eighth resistor R8 is connected with the indication pin LED_W of the main control chip U3, the second end of the eighth resistor R8 is connected with the cathode of the light emitting diode LED, and the anode of the light emitting diode LED is connected with the main control power supply end VCC.

In this embodiment, the indication circuit 630 displays according to the level of the indication pin led_w of the main control chip U3, for example, if the indication pin led_w of the main control chip U3 is at a low level, the light emitting diode LED is turned on, and the operating state of the circuit can be indicated to the user by controlling the turning on and off of the light emitting diode LED. For example, the switching state of the switching circuit 400 is indicated by the main control chip U3.

In one embodiment, referring to FIG. 6, key circuitry 620 includes: the first key SW1, the second key SW2, the eighth capacitor C8, the ninth resistor R9, the tenth resistor R10, the ninth capacitor C9, the eleventh resistor R11 and the twelfth resistor R12.

The first end of the tenth resistor R10 and the first end of the eighth capacitor C8 are commonly connected to the reset pin BTN_reset of the main control chip U3, the second end of the tenth resistor R10, the first end of the ninth resistor R9 and the first end of the first key SW1 are commonly connected, the second end of the ninth resistor R9 is connected with the main control power supply end VCC, and the second end of the eighth capacitor C8 and the second end of the first key SW1 are commonly grounded.

The first end of the ninth capacitor C9 and the first end of the eleventh resistor R11 are commonly connected to the key switch control pin btn_onoff of the main control chip U3, the second end of the eleventh resistor R11 and the first end of the twelfth resistor R12 are commonly connected to the first end of the second key SW2, the second end of the twelfth resistor R12 is connected to the main control power supply end VCC, and the second end of the ninth capacitor C9 and the second end of the second key SW2 are commonly grounded.

The embodiment of the application also provides a power supply system, which comprises: a plug-in power supply circuit as claimed in any one of the preceding claims.

In one embodiment, the power supply system in this embodiment includes a mains input and a photovoltaic input.

The utility power input end is used for accessing the electric wire netting, and the photovoltaic input end is connected to photovoltaic solar cell panel through photovoltaic dc-to-ac converter.

The beneficial effects of the embodiment of the application are that: the input end of the first unidirectional conduction circuit 210 is connected with the live wire end L1 of the first port 110, the output end of the first unidirectional conduction circuit 210 is connected with the input end of the AC-DC circuit 300, the input end of the second unidirectional conduction circuit 220 is connected with the live wire end L2 of the second port 120, the output end of the second unidirectional conduction circuit 220 is connected with the input end of the AC-DC circuit 300, the switch circuit 400 is connected between the live wire end L1 of the first port 110 and the live wire end L2 of the second port 120 and is turned on or off according to the received switch control signal, so that the connection state between the live wire end L1 of the first port 110 and the live wire end L2 of the second port 120 is controlled, the bidirectional power control between the first port 110 and the second port 120 is realized, and when the switch circuit 400 is turned off, no matter from which port the mains supply is input, the normal power supply of the control circuit 610 can be realized, and a user can install and use according to the actual wiring and a socket.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. A plug-in power supply circuit, the plug-in power supply circuit comprising:

a first port;

a second port;

2. The plug-in power supply circuit of claim 1, wherein the first port further comprises a ground terminal and the second port further comprises a ground terminal; the ground terminal of the first port is connected with the ground terminal of the second port.

3. The plug-in power supply circuit of claim 1, wherein the switching circuit comprises:

4. A plug-in power supply circuit as claimed in claim 3, characterized in that the switching module is a relay.

5. The plug-in power supply circuit of claim 4, wherein the switch drive module comprises: the first resistor, the second resistor, the third resistor, the first capacitor, the first diode and the first switch tube;

6. The plug-in power supply circuit of any one of claims 1-5, wherein the first unidirectional conducting circuit and the second unidirectional conducting circuit are rectifying circuits.

7. The plug-in power supply circuit of any one of claims 1-5, further comprising:

8. The plug-in power supply circuit of any one of claims 1-5, further comprising:

9. The plug-in power supply circuit of claim 8, wherein the plug-in power supply circuit further comprises:

10. A power supply system, comprising: a plug-in power supply circuit as claimed in any one of claims 1 to 9.