A miniature outdoor inverter device

Abstract

The application relates to the field of power electronics, and discloses a miniature outdoor inverter device, which comprises a power input module for receiving a direct-current power supply; a filter capacitor electrically connected with the power input module and used for filtering an input voltage; a driving board connected with the filter capacitor, wherein the driving board is provided with reverse connection protection, short circuit protection and overheat protection circuits and is used for outputting a driving signal; a power tube connected with the driving board and used for generating an alternating current under the action of the driving signal; a transformer connected with the power tube and used for generating an induced voltage according to the alternating current; and a voltage doubling capacitor connected with the transformer and used for carrying out voltage doubling treatment on the induced voltage. Through integration of the reverse connection, short circuit and overheat protection circuits and cooperation with the use of the protection tube, the circuit can be timely cut off under the conditions of power wiring errors, load abnormalities or device overheating, so that the applicability of the inverter in the outdoor complex environment is ensured, and the safety and stability of the device are improved.

Description

Technical Field

[0001] This invention relates to the field of power electronics technology, specifically to a miniature outdoor inverter device. Background Technology

[0002] A miniature outdoor inverter is a small power device that converts low-voltage direct current (DC) to alternating current (AC). It is typically used in conjunction with portable power supplies, solar panels, or car batteries to provide power to small household appliances and mobile devices. Miniature outdoor inverters are more compact and portable, making them suitable for outdoor work, camping, and emergency power supply scenarios. In recent years, to meet diverse user needs, miniature outdoor inverters have increasingly integrated multi-functional interfaces and emergency application capabilities, further expanding their application range. Existing miniature outdoor inverters generally achieve DC-to-AC energy conversion through simple power conversion circuits.

[0003] However, in current technology, there is a lack of robust protection mechanisms when power wiring errors, load short circuits, or device overheating occur, which can easily lead to damage to power devices or control circuits. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a miniature outdoor inverter device that solves the problem of lacking a robust protection mechanism, which can easily lead to damage to power transistors, transformers, or control circuits.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a miniature outdoor inverter device, comprising:

[0006] Power input module, used to receive DC power;

[0007] The filter capacitor is electrically connected to the power input module and is used to filter the input voltage;

[0008] The driver board is connected to the filter capacitor. The driver board is equipped with reverse connection protection, short circuit protection and overheat protection circuits, and is used to output drive signals.

[0009] A power transistor, connected to the driver board, is used to generate alternating current under the action of a drive signal;

[0010] A transformer, connected to the power transistor, is used to generate an induced voltage based on the alternating current;

[0011] A voltage multiplier capacitor, connected to the transformer, is used to multiply the induced voltage.

[0012] The thyristor, connected to the voltage multiplier capacitor and the load, is used to control the on and off of the output voltage;

[0013] An inductor and a turn-off capacitor are respectively connected to the thyristor to store energy when the thyristor is turned on, and to provide reverse current to the thyristor to turn it off after it is fully charged;

[0014] The output interface, connected to the thyristor, is used to provide AC output voltage to small household appliances or mobile terminals.

[0015] Through the above technical solution, DC power is effectively converted into AC power and output to small household appliances or mobile terminals. The driver board integrates reverse connection, short circuit, and overheat protection circuits, and with the use of protection tubes, the device can promptly cut off the circuit in case of power wiring errors, abnormal loads, or device overheating, avoiding damage to power devices and significantly improving safety and reliability. At the same time, by combining the topology of high-frequency transformer and voltage multiplier capacitor, efficient conversion from low-voltage DC to high-voltage AC is achieved, and the use of thyristors and turn-off branches ensures stable output. Thus, the device of this invention has stronger applicability and practical value in complex outdoor environments.

[0016] Preferably, the drive board is connected to a cooling fan, which automatically starts when the temperature exceeds a preset threshold to reduce the temperature of the power devices.

[0017] Preferably, the driver board further includes a wireless remote control interface for receiving remote control signals to control the power transistor or thyristor to turn on and off.

[0018] Preferably, the power input module is connected to a manual switch interface, allowing the user to directly control the inverter's switching state via a physical switch.

[0019] Preferably, the driver board is connected to a power adjustment unit, which is used to adjust the output voltage or output power by adjusting the drive signal output by the driver board to the power transistor.

[0020] Preferably, the driver board is electrically connected to an emergency rescue strobe switch, which is used to output a flashing signal for warning.

[0021] Preferably, the drive board is provided with a protective tube, which is used to prevent damage to the circuit caused by incorrect power supply polarity, short circuit or abnormal current.

[0022] Preferably, the transformer is a high-frequency transformer, with its primary winding connected to the power transistor and its secondary winding connected to the voltage multiplier capacitor, which is used to achieve electrical isolation between the input circuit and the output circuit, and to perform voltage transformation through the turns ratio of the primary and secondary windings.

[0023] The driver board is equipped with a remote control interface for connecting a remote control, which is used to receive external wireless signals and generate switch commands.

[0024] This invention provides a miniature outdoor inverter device. It has the following advantages:

[0025] 1. This invention integrates reverse connection, short circuit and overheat protection circuits, and uses protective tubes to cut off the circuit in time in case of power wiring errors, abnormal load or device overheating, so as to ensure the applicability of the inverter in complex outdoor environments and thus improve the safety and stability of the device.

[0026] 2. This invention achieves forced commutation shutdown by setting an inductor and a turn-off capacitor at both ends of the thyristor and utilizing the reverse current released by the energy storage element. This avoids the thyristor from continuously conducting and causing output runaway, thereby ensuring the rapid and reliable shutdown of the thyristor, making the inverter output more stable, and improving safety and stability under high load and complex operating conditions.

[0027] 3. The present invention sets a power adjustment unit on the driver board, which can adjust the output voltage or power according to different load requirements. At the same time, an emergency rescue flashing switch is connected to the driver board, which outputs a flashing signal as a warning in special circumstances, thereby realizing the adaptation to various electrical equipment and taking into account emergency functions, expanding the application value of the device in daily and special scenarios.

[0028] 4. This invention achieves efficient energy conversion from low-voltage DC to high-voltage AC by combining a high-frequency transformer and a voltage multiplier capacitor, while ensuring electrical isolation between input and output and improving operational safety. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a micro outdoor inverter device according to the present invention.

[0030] The components include: 1. Manual switch interface; 2. Cooling fan; 3. Power input module; 4. Filter capacitor; 5. Driver board; 6. Power transistor; 7. Protection transistor; 8. Transformer; 9. Voltage multiplier capacitor; 10. Inductor; 11. SCR; 12. Shutdown capacitor; 13. Power regulation; 14. Emergency rescue strobe switch; 15. Output line; 16. Remote control. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see the appendix Figure 1 This invention provides a miniature outdoor inverter device, comprising:

[0033] Power input module 3 is used to receive DC volt power;

[0034] The filter capacitor 4 is electrically connected to the power input module 3 and is used to filter the input voltage.

[0035] The driver board 5 is connected to the filter capacitor 4. The driver board 5 is equipped with reverse connection protection, short circuit protection and overheat protection circuits, and is used to output drive signals.

[0036] Power transistor 6 is connected to driver board 5 and is used to generate alternating current under the action of drive signal;

[0037] Transformer 8, connected to power transistor 6, is used to generate induced voltage based on alternating current;

[0038] Voltage multiplier capacitor 9 is connected to transformer 8 and is used to multiply the induced voltage.

[0039] The thyristor 11, connected to the voltage multiplier capacitor 9 and the load, is used to control the on and off of the output voltage.

[0040] Inductor 10 and turn-off capacitor 12 are respectively connected to silicon controlled rectifier 11 to store energy when silicon controlled rectifier 11 is turned on, and to provide reverse current to silicon controlled rectifier 11 to turn off after being fully charged;

[0041] Output interface 15 is connected to silicon controlled rectifier 11 and is used to provide AC output voltage to small household appliances or mobile terminals.

[0042] The power input module 3 receives 12V DC power, which is smoothed by the filter capacitor 4 and then enters the driver board 5. The driver board 5 is equipped with reverse connection protection, short circuit protection and overheat protection circuits. When the working state is confirmed to be normal, the driver outputs a drive signal to the power transistor 6, causing the power transistor 6 to alternately turn on and off at high frequency and generate alternating current. After the transformer 8 obtains alternating current on the primary side, it induces a voltage on the secondary side and transmits it to the voltage multiplier capacitor 9. The voltage multiplier capacitor 9 superimposes and stores the induced voltage and then sends the electrical energy to the thyristor 11. Under the action of the drive signal, the thyristor 11 turns on and releases electrical energy to the load. At the same time, the inductor 10 charges the turn-off capacitor 12. When the voltage of the turn-off capacitor 12 reaches the set value, it releases a reverse current to force the thyristor 11 to turn off, completing one energy output cycle and repeating continuously, thereby realizing the conversion from DC input to AC output. The output interface 15 is connected to the thyristor 11 and can provide a stable AC power supply for small home appliances and mobile terminals.

[0043] The device improves reliability by setting up multiple protection circuits, enhances operational safety through electrical isolation of transformer 8, and ensures stable inverter output by cooperating with inductor 10 and turn-off capacitor 12 to reliably turn off silicon controlled rectifier 11. Meanwhile, the multi-functional design of output interface 15 enables the device to power both home appliances and mobile terminals for emergency charging. It has the advantages of compact structure, ease of use, and suitability for outdoor scenarios.

[0044] The driver board 5 is connected to a cooling fan 2, which automatically starts when the temperature exceeds a preset threshold to reduce the temperature of the power devices.

[0045] Specifically, the driver board 5 is connected to a cooling fan 2. The driver board 5 is equipped with a temperature detection circuit to detect the operating temperature of heat-generating components such as the power transistor 6 and the transformer 8 in real time. When the detected temperature exceeds the preset threshold, the driver board 5 outputs a control signal to automatically start the cooling fan 2 and form a forced airflow to quickly remove the heat from the surface of the device and the surrounding air, so that the system temperature is maintained within a safe range. When the temperature drops below the threshold, the cooling fan 2 is turned off, thereby effectively preventing the components from being damaged due to overheating and improving the stability of the device under high load or high temperature environments.

[0046] The driver board 5 further includes a wireless remote control interface for receiving remote control signals to control the power transistor 6 or the silicon controlled rectifier 11 to turn on and off.

[0047] Specifically, the driver board 5 further includes a wireless remote control interface, which can be connected to an external remote control via infrared, radio frequency or Bluetooth communication methods to receive control signals sent by the user. After receiving the remote control signal, the driver board 5 analyzes it through internal logic circuits and outputs corresponding control commands to control the conduction and cutoff of the power transistor 6 or the triggering and cutoff of the thyristor 11, thereby realizing remote operation of the inverter device output status.

[0048] The power input module 3 is connected to a manual switch interface 1, which allows users to directly control the switching status of the inverter via a physical switch.

[0049] Specifically, the power input module 3 is connected to a manual switch interface 1, allowing users to directly connect or disconnect the power input circuit physically, thereby controlling the overall switching status of the inverter device. This ensures the controllability and reliability of the device in various usage scenarios.

[0050] The driver board 5 is connected to a power adjustment unit 13, which is used to adjust the output voltage or output power by adjusting the drive signal output from the driver board 5 to the power transistor 6.

[0051] Specifically, the power regulation unit 13 receives user commands (such as knob adjustment, button operation, or remote control signal) and outputs a control signal to the drive board 5. The drive board 5 dynamically adjusts the drive pulse parameters (including pulse width duty cycle and / or frequency) output to the power transistor 6 according to the control signal. By changing the timing characteristics of the power transistor 6's on and off states, the amplitude and waveform of the alternating current on the primary side of the transformer 8 change synchronously, thereby regulating the secondary induced voltage of the transformer 8 and the energy storage output level of the voltage multiplier capacitor 9, and realizing continuous regulation of the AC output voltage or power.

[0052] The driver board 5 is electrically connected to an emergency rescue strobe switch 14, which is used to output a flashing signal for warning.

[0053] Specifically, the drive board 5 is electrically connected to an emergency rescue strobe switch 14, which is connected to the control circuit in the drive board 5. When the user triggers the emergency rescue strobe switch 14, the drive board 5 outputs an intermittent control signal, causing the external load to flash periodically, thereby creating a clear warning effect, which can help to alert surrounding personnel or mark the location, and improve the safety and emergency applicability of use.

[0054] The driver board 5 is equipped with a protection tube 7, which is used to prevent damage to the circuit caused by incorrect power supply polarity, short circuit or abnormal current.

[0055] Specifically, the protection tube 7 is in the form of a MOSFET, diode or dedicated electronic protection device, and is electrically connected to the power input module 3 and the filter capacitor 4. It is used to automatically block the reverse current when the power supply wiring polarity is incorrect, and to quickly cut off the circuit when a short circuit or abnormal current occurs at the output terminal, thereby preventing damage to key components such as the power tube 6, transformer 8 and thyristor 11.

[0056] Transformer 8 is a high-frequency transformer. Its primary winding is connected to power transistor 6, and its secondary winding is connected to voltage multiplier capacitor 9. It is used to achieve electrical isolation between the input circuit and the output circuit, and to perform voltage transformation through the turns ratio of the primary and secondary windings.

[0057] Specifically, transformer 8 is a high-frequency transformer. Its primary winding is connected to power transistor 6. When power transistor 6 is alternately turned on and off at high frequency under the control of drive board 5, the primary winding generates alternating magnetic flux. The secondary winding thereby induces alternating voltage and is connected to voltage multiplier capacitor 9 for voltage boosting and energy storage. The voltage is transformed by the turns ratio of the primary and secondary windings. At the same time, electrical isolation is achieved between the input circuit and the output circuit, ensuring that the low-voltage DC power supply can be converted into a higher voltage AC signal that meets the load requirements. This avoids input-side faults being directly transmitted to the output side and improves the adaptability of outdoor and emergency power supply.

[0058] The driver board 5 is equipped with a remote control interface to connect to the remote control 16. The remote control 16 is used to receive external wireless signals and generate switch commands.

[0059] Specifically, after receiving external wireless signals, the remote controller 16 generates a switch command, which is transmitted to the remote controller interface of the driver board 5 through a wire. The driver board 5 controls the on / off of the power transistor 6 drive signal and the thyristor 11 trigger signal according to the received switch command, thereby realizing wireless remote control of the inverter's working status.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A miniature outdoor inverter device, characterized in that, include: The power input module (3) is used to receive DC voltage power. The filter capacitor (4) is electrically connected to the power input module (3) and is used to filter the input voltage; The driver board (5) is connected to the filter capacitor (4). The driver board (5) is equipped with reverse connection protection, short circuit protection and overheat protection circuits, and is used to output drive signals. The power transistor (6) is connected to the drive board (5) and is used to generate alternating current under the action of the drive signal; A transformer (8) is connected to the power transistor (6) and is used to generate an induced voltage according to the alternating current; A voltage multiplier capacitor (9) is connected to the transformer (8) and is used to multiply the induced voltage. A thyristor (11) is connected to the voltage multiplier capacitor (9) and the load to control the on and off of the output voltage; The inductor (10) and the turn-off capacitor (12) are respectively connected to the thyristor (11) to store energy when the thyristor (11) is turned on, and to provide reverse current to the thyristor (11) to turn off after being fully charged; The output interface (15) is connected to the thyristor (11) and is used to provide AC output voltage to small household appliances or mobile terminals.

2. The miniature outdoor inverter device according to claim 1, characterized in that, The drive board (5) is connected to a cooling fan (2), which automatically starts when the temperature exceeds a preset threshold to reduce the temperature of the power device.

3. The miniature outdoor inverter device according to claim 1, characterized in that, The driver board (5) further includes a wireless remote control interface for receiving remote control signals to control the power transistor (6) or the thyristor (11) to turn on and off.

4. A miniature outdoor inverter device according to claim 1, characterized in that, The power input module (3) is connected to a manual switch interface (1), which allows the user to directly control the switching state of the inverter through a physical switch.

5. A miniature outdoor inverter device according to claim 1, characterized in that, The drive board (5) is connected to a power adjustment unit (13), which is used to adjust the output voltage or output power by adjusting the drive signal output from the drive board (5) to the power tube (6).

6. A miniature outdoor inverter device according to claim 1, characterized in that, The drive board (5) is electrically connected to an emergency rescue strobe switch (14), which is used to output a flashing signal for warning.

7. A miniature outdoor inverter device according to claim 1, characterized in that, The drive board (5) is provided with a protective tube (7), which is used to prevent damage to the circuit caused by incorrect power supply polarity, short circuit or abnormal current.

8. A miniature outdoor inverter device according to claim 1, characterized in that, The transformer (8) is a high-frequency transformer. Its primary winding is connected to the power transistor (6), and its secondary winding is connected to the voltage multiplier capacitor (9). It is used to realize electrical isolation between the input circuit and the output circuit, and to perform voltage transformation through the turns ratio of the primary and secondary windings.

9. A miniature outdoor inverter device according to claim 1, characterized in that, The drive board (5) is provided with a remote control interface to connect to a remote control (16), which is used to receive external wireless signals and generate switch commands.

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