Isolation detection wake-up circuit

Abstract

The utility model discloses an isolation detection wake-up circuit, which relates to the field of sockets and comprises a detection circuit used for detecting whether a national standard socket introduces voltage or not and feeding back a voltage signal to an isolation circuit when the voltage is introduced; the isolation circuit is used for isolating and driving the wake-up circuit to work when a voltage signal is input; the wake-up circuit is used for providing a wake-up signal for the DSP during working and controlling the disconnection of the charger socket and the power supply switch through the DSP; compared with the prior art, the beneficial effects of the utility model are that: by detecting the voltage leading-in condition of the national standard socket of the circuit, the utility model obtains the voltage signal, and feeds back the voltage signal to the DSP through the isolation circuit and the wake-up circuit, so as to control the connection condition of the power supply switch and prevent the risk of electric shock.

Description

Technical Field

[0001] The utility model relates to the field of sockets, in particular to an isolation detection and wake-up circuit. Background Technique

[0002] Both national standard sockets and charger sockets can introduce voltage for power supply. Equipment works by accessing national standard sockets or charging gun sockets. There is a situation where the two interfaces are closed. When one socket supplies power, it will affect the other socket, and there is a risk of electric shock, which needs to be improved. Content of the Utility Model

[0003] The purpose of the utility model is to provide an isolation detection and wake-up circuit to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution:

[0005] An isolation detection and wake-up circuit, comprising:

[0006] A detection circuit, used to detect whether the national standard socket introduces voltage. When voltage is introduced, a voltage signal is fed back to the isolation circuit;

[0007] An isolation circuit, used to isolate and drive the wake-up circuit to work when a voltage signal is input;

[0008] A wake-up circuit, used to provide a wake-up signal for the DSP when working, and control the disconnection of the charger socket and the power supply switch through the DSP;

[0009] The detection circuit is connected to the isolation circuit, and the isolation circuit is connected to the wake-up circuit.

[0010] As a further scheme of the utility model: The detection circuit includes a diode D1, a resistor R1, and a resistor R2. The positive electrode of the diode D1 is connected to the live wire interface (L2) of the national standard socket. The negative electrode of the diode D1 is connected to one end of the resistor R1. The other end of the resistor R1 is connected to one end of the resistor R2 and the isolation circuit. The other end of the resistor R2 is grounded.

[0011] As a further scheme of the utility model: The isolation circuit includes an optocoupler U1. The first end of the optocoupler U1 is connected to the detection circuit. The second end of the optocoupler U1 is grounded. The third end of the optocoupler U1 is connected to the voltage V. The fourth end of the optocoupler U1 is connected to the wake-up circuit.

[0012] As a further scheme of the utility model: The wake-up circuit includes a resistor R3 and a resistor R4. One end of the resistor R3 is connected to one end of the resistor R4 and the isolation circuit. The other end of the resistor R3 is grounded. The other end of the resistor R4 is connected to the DSP.

[0013] As a further solution of the present utility model: the isolation detection and wake-up circuit further includes a power conversion module, which is controlled by the DSP. When in the inverter mode, the DSP controls the charger socket and the power supply switch to close, and the national standard socket and the power supply switch to disconnect.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: by detecting the voltage introduction condition of the national standard socket of the detection circuit, obtaining a voltage signal, and feeding it back to the DSP through the isolation circuit and the wake-up circuit, the connection condition of the power supply switch is controlled to prevent the risk of electric shock. Description of the Drawings

[0015] Figure 1 It is a circuit diagram of an isolation detection and wake-up circuit.

[0016] Figure 2 It is an application circuit diagram of an isolation detection and wake-up circuit. Detailed Embodiment

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figure 1 and Figure 2 , an isolation detection and wake-up circuit, including:

[0019] A detection circuit for detecting whether a voltage is introduced into the national standard socket, and when a voltage is introduced, feeding back a voltage signal to the isolation circuit;

[0020] An isolation circuit for isolating and driving the wake-up circuit to work when a voltage signal is input;

[0021] A wake-up circuit for providing a wake-up signal to the DSP when working, and controlling the disconnection of the charger socket and the power supply switch through the DSP;

[0022] The detection circuit is connected to the isolation circuit, and the isolation circuit is connected to the wake-up circuit.

[0023] In this embodiment: please refer to Figure 1 and Figure 2 , the detection circuit includes a diode D1, a resistor R1, and a resistor R2. The positive electrode of the diode D1 is connected to the live wire interface (L2) of the national standard socket, the negative electrode of the diode D1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R2 and the isolation circuit, and the other end of the resistor R2 is grounded.

[0024] The external ports of L1 and N1 are charger sockets, and the external ports of L2 and N2 are national standard sockets. When there is voltage input at L2 and N2, the voltage forms a loop through diode D1, resistor R1, resistor R2, and the ground. There is a voltage difference across resistor R2, which is fed back to the isolation circuit.

[0025] In this embodiment: Please refer to Figure 1 and Figure 2 , the isolation circuit includes optocoupler U1. The first end of optocoupler U1 is connected to the detection circuit, the second end of optocoupler U1 is grounded, the third end of optocoupler U1 is connected to voltage V, and the fourth end of optocoupler U1 is connected to the wake-up circuit.

[0026] The light-emitting diode inside optocoupler U1 receives the voltage difference signal across resistor R2, emits light to irradiate the photosensitive triode inside optocoupler U1, triggers the photosensitive triode to conduct, and voltage V drives the wake-up circuit through the photosensitive triode.

[0027] In this embodiment: Please refer to Figure 1 and Figure 2 , the wake-up circuit includes resistor R3 and resistor R4. One end of resistor R3 is connected to one end of resistor R4 and the isolation circuit, the other end of resistor R3 is grounded, and the other end of resistor R4 is connected to the DSP.

[0028] When the wake-up circuit is working, there is a voltage signal on resistor R3, which is fed back to the DSP through resistor R4. The DSP obtains the voltage information introduced by the national standard socket to control the power supply switch RL1. At this time, the L1, N1 ports are disconnected from the L2, N2 ports through RL1.

[0029] In this embodiment: Please refer to Figure 2 , the isolation detection and wake-up circuit further includes a power conversion module. The power conversion module is under the control of the DSP. When in the inversion mode, the DSP controls the charger socket and the power supply switch to close, and the national standard socket and the power supply switch to open.

[0030] When there is voltage input at the AC input terminals L2 and N2, the AC voltage forms a loop through diode D1, resistor R1, and resistor R2. The voltage divided by resistors R1 and R2 causes the diode in optocoupler U1 to emit light, which then makes the internal triode in optocoupler U1 conduct. Resistor R3 obtains voltage and is input to the DSP after being current-limited by resistor R4. After the DSP control circuit detects the signal, it determines that there is AC voltage input at L2 and N2, and then outputs a signal to control the power conversion module to start working. At this time, the L1, N1 ports are disconnected from the L2, N2 ports through the power supply switch RL1, so that there is no AC voltage at the L1, N1 ports, thereby preventing electric shock when contacting the L1, N1 ports.

[0031] Conversely, when there is no AC voltage input at ports L2 and N2, there is no voltage across resistors R1 and R2, the internal diode of optocoupler U1 is not conducting, there is no voltage across resistor R3, and the DSP has no input signal. At this time, the DSP controller controls the power supply switch RL1 to connect to ports L1 and N1, so that there is no AC input voltage at ports L2 and N2. When connecting to the AC power grid, the power supply switch RL1 is controlled by the detection circuit to close ports L2 and N2, enabling charging to start after charging wake-up. And at this time, ports L1 and N1 are open-circuited from ports L2 and N2 through the power supply switch RL1, so that there is no AC voltage at ports L2 and N2, thereby preventing electric shock when contacting ports L2 and N2.

[0032] When the power electric conversion module is in the inverter working mode, the DSP controls the power supply switch RL1 to always connect ports L1 and N1, so that ports L2 and N2 are always in an open-circuit state with ports L1 and N1, and there is no AC power supply at ports L2 and N2, preventing the risk of electric shock.

[0033] The working principle of the present utility model is as follows: The detection circuit is used to detect whether the national standard socket introduces voltage. When voltage is introduced, a feedback voltage signal is sent to the isolation circuit; the isolation circuit is used to isolate and drive the wake-up circuit to work when a voltage signal is input; the wake-up circuit is used to provide a wake-up signal for the DSP during operation, and the DSP is used to control the disconnection of the charger socket and the power supply switch.

[0034] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive.

[0035] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An isolation detection and wake-up circuit, characterized in that The isolation detection and wake-up circuit includes: A detection circuit for detecting whether a voltage is introduced into the national standard socket. When a voltage is introduced, it feeds back a voltage signal to the isolation circuit; An isolation circuit for isolating and driving the wake-up circuit to work when a voltage signal is input; A wake-up circuit for providing a wake-up signal to the DSP during operation, and controlling the disconnection of the charger socket and the power supply switch through the DSP; The detection circuit is connected to the isolation circuit, and the isolation circuit is connected to the wake-up circuit; The detection circuit includes a diode D1, a resistor R1, and a resistor R2. The positive pole of the diode D1 is connected to the live wire interface of the national standard socket, the negative pole of the diode D1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R2 and the isolation circuit, and the other end of the resistor R2 is grounded.

2. The isolation detection wake-up circuit according to claim 1, wherein The isolation circuit includes an optocoupler U1. The first end of the optocoupler U1 is connected to the detection circuit, the second end of the optocoupler U1 is grounded, the third end of the optocoupler U1 is connected to the voltage V, and the fourth end of the optocoupler U1 is connected to the wake-up circuit.

3. The isolation detection wake-up circuit according to claim 1, wherein The wake-up circuit includes a resistor R3 and a resistor R4. One end of the resistor R3 is connected to one end of the resistor R4 and the isolation circuit, the other end of the resistor R3 is grounded, and the other end of the resistor R4 is connected to the DSP.

4. The isolation detection wake-up circuit according to any one of claims 1 to 3, characterized in that, The isolation detection and wake-up circuit further includes a power conversion module. The power conversion module is controlled by the DSP. When in the inversion mode, the DSP controls the charger socket and the power supply switch to close, and the national standard socket and the power supply switch to disconnect.

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