Automatic switching power supply device applied to photovoltaic inverter

Abstract

The utility model discloses an automatic switching power supply device applied to a photovoltaic inverter, which comprises an inverter control circuit and a load joint, a Hall device is arranged in the inverter control circuit, a joint magnet is arranged in the load joint, the Hall device detects the magnetic field intensity of the joint magnet near a socket, and the socket is connected with the load joint. The output end of the Hall device is connected with the input end of the microcontroller, the output end of the microcontroller is connected with the input end of the relay through the driver, and the relay is connected with the output connecting port. By automatically detecting the connection state of the load, automatic control of power supply is realized, and manual intervention is not needed; power supply abnormity caused by misoperation or accidental falling of the load is avoided, and the safety of the system is improved.

Description

Technical Field

[0001] The utility model relates to an automatic switching power supply device, in particular to an automatic switching power supply device applied to a photovoltaic inverter. Background Art

[0002] In a photovoltaic system, an inverter plays an important role in converting direct current generated by photovoltaic panels into alternating current. However, traditional inverters have deficiencies in power supply control, being unable to automatically detect the connection status of loads and control power supply accordingly.

[0003] In order to improve the intelligence and safety of the system, the utility model proposes an automatic load detection power supply device for use in a photovoltaic inverter. Summary of the Invention

[0004] To solve the problem of load connection recognition in a photovoltaic inverter, the utility model needs to provide an automatic switching power supply device applied to a photovoltaic inverter, which improves the intelligence level and safety.

[0005] The utility model provides the following technical solutions:

[0006] An automatic switching power supply device applied to a photovoltaic inverter includes an inverter control circuit and a load connector. A Hall device is installed in the inverter control circuit, and a connector magnet is installed in the load connector. The Hall device detects the magnetic field intensity of the connector magnet near the socket. The output end of the Hall device is connected to the input end of a microcontroller, the output end of the microcontroller is connected to the input end of a relay through a driver, and the relay is connected to an output port.

[0007] When the load connector is plugged into the inverter socket, the Hall device detects the magnetic field and outputs a signal to the microcontroller MCU. After receiving the signal, the microcontroller MCU turns on the relay through the driver to supply power to the load;

[0008] When the load connector is unplugged from the inverter socket, due to the disappearance of the magnetic field, the output signal of the Hall device changes, and the microcontroller MCU disconnects the relay according to the changed signal to stop power supply.

[0009] Further, the inverter control circuit includes an inverter and a relay. The inverter is used as a driver. The input end of the inverter introduces the drive signal RELAY output by the microcontroller. The output end of the inverter is connected to the relay, and the relay is also connected to an output interface. The signal OUT output by the Hall device S1 is connected to the microcontroller MCU.

[0010] Further, the Hall device is connected to a capacitor. One end of the capacitor is connected to the power supply VCC, and the other end is grounded.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] Improved the level of intelligence: By automatically detecting the connection status of the load, automatic control of power supply is achieved without manual intervention.

[0013] Enhanced safety: Avoided abnormal power supply caused by misoperation or accidental detachment of the load, improving the safety of the system. Brief Description of the Drawings

[0014] Figure 1 It is a principle block diagram of the present utility model.

[0015] Figure 2 It is a control circuit diagram of the inverter of the present utility model.

[0016] Among them, 1. Hall device; 2. Connector magnet; 3. Microcontroller; 4. Driver; 5. Relay; 6. Output interface. 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 in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0018] Please refer to Figure 1 , an automatic switching power supply device applied to a photovoltaic inverter of the present utility model includes an inverter control circuit and a load connector. A Hall device 1 is installed in the inverter control circuit, and a connector magnet 2 is installed in the load connector. The Hall device 1 detects the magnetic field intensity of the connector magnet 2 near the socket. The output end of the Hall device 1 is connected to the input end of the microcontroller 3. The output end of the microcontroller 3 is connected to the input end of the relay 5 through the driver 4, and the relay 5 is connected to the output port 6.

[0019] When the load connector is plugged into the inverter socket, the Hall device detects the magnetic field and outputs a signal to the microcontroller MCU. After receiving the signal, the microcontroller MCU conducts the relay through the driver to supply power to the load;

[0020] When the load connector is unplugged from the inverter socket, due to the disappearance of the magnetic field, the output signal of the Hall device changes, and the microcontroller MCU disconnects the relay according to the changed signal to stop power supply.

[0021] Figure 2As shown, the inverter control circuit includes an inverter U4C and a relay K1. The inverter U4C is used as a driver. The driving signal RELAY output by the microcontroller MCU is introduced into the input terminal of the inverter U4C. The output terminal of the inverter U4C is connected to the relay K1. The relay K1 is also connected to the output interface JP1. The signal OUT output by the Hall device S1 is connected to the microcontroller MCU.

[0022] The inverter adopts the model 74LS04. The Hall device generally adopts a Hall switch sensor, and the model used here is SL1603TH.

[0023] The Hall device S1 is connected to a capacitor C1. One end of the capacitor C1 is connected to the power supply VCC, and the other end is grounded. The setting of the capacitor can filter out power supply noise and should be placed next to the power supply pin of the Hall device during layout.

[0024] When the magnet of the connector approaches a certain distance, the Hall device outputs a low-level signal. After the microcontroller (MCU) receives the change in the output signal of the Hall device, it outputs a high-level signal, which drives the relay to close through the inverter, and the inverter starts to supply power. When the connector is pulled out, the output signal of the Hall device becomes high level. After the microcontroller (MCU) detects this signal, it outputs a low-level signal to cut off the relay, and the socket stops outputting.

[0025] An automatic switching power supply device applied to a photovoltaic inverter has the following advantages:

[0026] Improve the intelligent level: Through automatic detection of the connection status of the load, automatic control of power supply is realized without manual intervention.

[0027] Enhance safety: Avoid abnormal power supply caused by misoperation or accidental detachment of the load, and improve the safety of the system.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic switching power supply device applied to a photovoltaic inverter, characterized in that: It includes an inverter control circuit and a load connector. A Hall device (1) is installed in the inverter control circuit, and a connector magnet (2) is installed in the load connector. The Hall device (1) detects the magnetic field intensity of the connector magnet (2) near the socket. The output end of the Hall device (1) is connected to the input end of the microcontroller (3), the output end of the microcontroller (3) is connected to the input end of the relay (5) through the driver (4), and the relay (5) is connected to the output connection port (6).

2. The automatic switching power supply device applied to a photovoltaic inverter according to claim 1, characterized in that: The inverter control circuit includes an inverter and a relay. The inverter is used as a driver. The drive signal RELAY output by the microcontroller is introduced into the input end of the inverter. The output end of the inverter is connected to the relay, and the relay is also connected to the output interface. The signal output by the Hall device is connected to the microcontroller.

3. The automatic switching power supply device applied to a photovoltaic inverter according to claim 2, wherein: The Hall device is connected to a capacitor. One end of the capacitor is connected to the power supply VCC, and the other end is grounded.

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