An enable control circuit for a bidirectional inverter

Abstract

The application belongs to the technical field of inverters, and discloses an enabling control circuit for a bidirectional inverter, wherein a signal input port AC-EN is connected with one end of a resistor R5 and one end of a resistor R1, the other end of the resistor R5 is connected with one end of a resistor R8, one end of a resistor R11 and an anode of an optical coupler OT1, the other end of the resistor R8 is connected with one end of a resistor R7, one end of a resistor R4 and one end of a resistor R3, the other end of the resistor R7 is connected with a power port, and the other end of the resistor R1 is connected with one end of a capacitor C1, one end of a resistor R2, the other end of the resistor R3 and a base of a triode Q1. The application has the beneficial effects that: through three triodes, one optical coupler and some peripheral resistance-capacitance devices, the purpose of enabling control of compatibility of isolation, non-isolation and high-low level switchable in the bidirectional inverter can be achieved, and the application has the advantages of simple circuit, low cost, good versatility and easy implementation.

Description

Technical Field

[0001] This invention relates to the field of inverter technology, and more particularly to an enable control circuit for a bidirectional inverter. Background Technology

[0002] With the continuous growth of global energy demand and the rapid development of non-renewable energy, as well as the increasingly serious grid instability caused by disasters, portable energy storage projects have become a hot topic in current research and development. Portable energy storage projects generally require the charging and discharging of batteries, which are often achieved through power converters. Among power converters, bidirectional inverters can achieve both high-power charging and discharging of batteries on a single board, fulfilling two functions on one power board. Therefore, bidirectional inverters are a popular research area in power converters for portable energy storage projects.

[0003] The transmission of signals and the control of power output in bidirectional inverters are achieved through signal terminals connected to the surface control in mobile energy storage devices. In the market, when sending discharge or inverter control commands to bidirectional inverters, a high-level signal, a low-level signal, or a high-impedance signal is generally required. Some manufacturers require isolation for this signal, while others do not. The control logic of each manufacturer is different. Currently, there is no unified device to meet the above requirements. The market needs an enable control circuit solution for bidirectional inverters that is compatible with isolation, non-isolation, and high / low level switching.

[0004] Therefore, it is necessary to study a circuit that can implement both isolated and non-isolated high and low levels, selectively implement high or low levels, and isolated or non-isolated enable control, and has advantages such as low cost, low price, reduced resource waste and good versatility. Summary of the Invention

[0005] This invention discloses an enable control circuit for a bidirectional inverter, which is compatible with isolated, non-isolated and high / low level switchable enable control in the bidirectional inverter, and plays the role of controlling the inverter output. It can effectively solve the technical problems involved in the background art.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] An enable control circuit for a bidirectional inverter includes a signal input port AC-EN, a signal output port ACEN-MCU, and a power supply port;

[0008] The signal input port AC-EN is connected to one end of resistor R5 and one end of resistor R1. The other end of resistor R5 is connected to one end of resistor R8, one end of resistor R11, and the anode of optocoupler OT1. The other end of resistor R8 is connected to one end of resistor R7, one end of resistor R4, and one end of resistor R3. The other end of resistor R7 is connected to the power supply port. The other end of resistor R1 is connected to one end of capacitor C1, one end of resistor R2, the other end of resistor R3, and the base of transistor Q1. The collector of transistor Q1 is connected to resistor R4. The other end, one end of resistor R6 and the base of transistor Q2, the collector of transistor Q2 is connected to the cathode of optocoupler OT1 and one end of resistor R9, the other end of resistor R9 is connected to the emitter of transistor Q2, one end of resistor R10, the other end of resistor R6, the emitter of transistor Q1, one end of resistor R19, the other end of resistor R2 and the other end of capacitor C1, the other end of resistor R10 is connected to one end of resistor R18 and port COMGND, the other end of resistor R18 is connected to the other end of resistor R19 and port AGND;

[0009] The signal output port ACEN-MCU is connected to one end of resistor R17. The other end of resistor R17 is connected to one end of resistor R16 and the collector of transistor Q3. The other end of resistor R16 is connected to port MCU-GND. The base of transistor Q3 is connected to one end of resistor R15, one end of capacitor C2, and one end of resistor R14. The emitter of transistor Q3, the other end of resistor R15, and the other end of capacitor C2 are connected to port AGND. The other end of resistor R14 is connected to the emitter of optocoupler OT1 and the other end of resistor R11. The collector of optocoupler OT1 is connected to the power supply port through resistors R13 and R12.

[0010] Specifically, this invention discloses an enable control circuit scheme for bidirectional inverters that is compatible with isolation, non-isolation, and high / low level switchability. The enable control circuit scheme uses optocouplers, transistors, and resistors and capacitors as the main control elements. The enable control circuit uses three transistors and one optocoupler to achieve low-level enable control; uses one transistor and one optocoupler to achieve high-level enable control; and uses one resistor to achieve isolation and non-isolation. The enable control circuit, compatible with isolation, non-isolation, and high / low level switching, is configured as follows: The AC-EN network is connected to a high-level, low-level, or high-impedance signal from the host computer's surface control chip. The AC-EN network is connected to the base of transistor Q1 through resistors R1 and R2, and simultaneously, the AC-EN network is connected to the anode of the first optocoupler OT1 through resistor R5. The collector of the first transistor Q1 is connected to the base of the second transistor Q2 through resistors R4 and R6. The collector of the first transistor Q1 is connected in series with the power supply BAT+ network (power port) through resistors R4 and R7. The BAT+ network is connected to the positive terminal of the battery. The emitter of the first transistor Q1 is connected to ground through resistor R19. The collector of the second transistor Q2 is connected to the cathode of the first optocoupler OT1, and the emitter of the second transistor Q2 is connected to isolation ground through resistor R10. The anode of the first optocoupler is connected to the base of the first optocoupler OT1 through resistor R19. Resistor R7 and resistor R8 are connected in series to draw power from the BAT+ network. Resistor R9 is connected between the anode and cathode of the first optocoupler for high-level control. The collector of the first optocoupler draws power from the BAT+ network through resistors R12 and R13. The emitter of the first optocoupler is connected to the base of the third transistor Q3 through resistors R14 and R15 and capacitor C2. Resistor R11 is connected between the emitter and anode of the first optocoupler for non-isolation control. The collector of the third transistor Q3 is powered by the 3.3V network (port MCU-GND) supplying the microcontroller through resistor R16. The collector of the third transistor Q3 is also connected to resistor R17 to the internal microcontroller pin. This scheme is used in bidirectional inverters to control the inverter's startup. It can also be used in other devices that require selective high or low level, isolated or non-isolated enable control.

[0011] This invention achieves the goal of enabling bidirectional inverters with compatible isolation, non-isolation, and high / low level switchable enable control using only three transistors, one optocoupler, and some peripheral resistors and capacitors. It has the advantages of simple circuit, low cost, good versatility, and ease of implementation.

[0012] As a preferred improvement of the present invention: the signal input port AC-EN is connected to the external control panel of the inverter energy storage device, the signal output port ACEN-MCU is connected to the built-in microcontroller MCU of the inverter energy storage device, and the port MCU-GND is connected to the power supply port of the microcontroller MCU.

[0013] As a preferred improvement of the present invention, the power port is connected to a battery.

[0014] As a preferred improvement of the present invention: the port AGND is grounded, and the port COMGND is connected to isolation ground.

[0015] The beneficial effects of this invention are as follows:

[0016] In the enable control signal of the bidirectional inverter, all possible control signal scenarios are compatible. The circuit that meets the required control can be selectively used. High-level isolation scheme, high-level non-isolation scheme, low-level isolation scheme, and low-level non-isolation scheme can be selected through transistors, optocouplers, and resistors / capacitors. The four module circuits are integrated together. In actual use, the circuit that meets the control requirements can be selectively used according to the needs. The circuits of each module may be used in conjunction with other modules. The transistors, optocouplers, and resistors / capacitors of each module can be selectively used according to the needs of the actual circuit. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0018] Figure 1 This is a schematic diagram of an enable control circuit for a bidirectional inverter according to the present invention;

[0019] Figure 2 This is a schematic diagram of a high-level non-isolated enable control structure.

[0020] Figure 3 Schematic diagram of high-level isolation enable control structure;

[0021] Figure 4 This is a schematic diagram of a low-level non-isolated enable control structure.

[0022] Figure 5 This is a schematic diagram of a low-level isolation enable control structure. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0025] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0028] Please see Figure 1As shown, this invention provides an enable control circuit for a bidirectional inverter, including a signal input port AC-EN, a signal output port ACEN-MCU, and a power supply port. The signal input port AC-EN is connected to one end of resistor R5 and one end of resistor R1. The other end of resistor R5 is connected to one end of resistor R8, one end of resistor R11, and the anode of optocoupler OT1. The other end of resistor R8 is connected to one end of resistor R7, one end of resistor R4, and one end of resistor R3. The other end of resistor R7 is connected to the power supply port. The other end of resistor R1 is connected to one end of capacitor C1, one end of resistor R2, the other end of resistor R3, and the base of transistor Q1. The collector of transistor Q1 is connected to the other end of resistor R4, one end of resistor R6, and the base of transistor Q2. The collector of transistor Q2 is connected to the cathode of optocoupler OT1 and one end of resistor R9. The other end of resistor R9 is connected to the emitter of transistor Q2, one end of resistor R10, and resistor R... The other end of resistor R10 is connected to the emitter of transistor Q1, one end of resistor R19, the other end of resistor R2, and the other end of capacitor C1. The other end of resistor R10 is connected to one end of resistor R18 and port COMGND. The other end of resistor R18 is connected to the other end of resistor R19 and port AGND. The signal output port ACEN-MCU is connected to one end of resistor R17. The other end of resistor R17 is connected to one end of resistor R16 and the collector of transistor Q3. The other end of resistor R16 is connected to port MCU-GND. The base of transistor Q3 is connected to one end of resistor R15, one end of capacitor C2, and one end of resistor R14. The emitter of transistor Q3, the other end of resistor R15, and the other end of capacitor C2 are connected to port AGND. The other end of resistor R14 is connected to the emitter of optocoupler OT1 and the other end of resistor R11. The collector of optocoupler OT1 is connected to the power supply port through resistors R13 and R12. In this embodiment, the signal input port AC-EN is connected to the external control panel of the inverter energy storage device, the signal output port ACEN-MCU is connected to the built-in microcontroller MCU of the inverter energy storage device, and the port MCU-GND is connected to the power supply port of the microcontroller MCU. The power supply port is connected to the battery, the port AGND is grounded, and the port COMGND is connected to the isolation ground.

[0029] Specifically, the first and second resistors are connected to the base of the first transistor, the fifth resistor is connected to the anode of the first optocoupler, and the collector of the first transistor is connected to the base of the second transistor through the fourth and sixth resistors. The collector of the first transistor is connected in series with the positive terminal of the battery through the fourth and seventh resistors, and the emitter of the first transistor is connected to ground through the nineteenth resistor. The collector of the second transistor is connected to the cathode of the first optocoupler, and the emitter of the second transistor is connected to isolation ground through the tenth resistor. The anode of the first optocoupler is connected in series with the seventh and eighth resistors to the positive terminal of the battery, and the ninth resistor is connected between the anode and cathode of the first optocoupler for high-level control. The collector of the first optocoupler is connected to the positive terminal of the battery through the twelfth and thirteenth resistors, and the emitter of the first optocoupler is connected to the base of the third transistor through the fourteenth and fifteenth resistors and the second capacitor. The eleventh resistor is connected between the emitter and anode of the first optocoupler for non-isolated control. The collector of the third transistor is powered by the microcontroller's power supply circuit through the sixteenth resistor, and the collector of the third transistor is also connected to the internal microcontroller pin through the seventeenth resistor. Addressing the complex inverter enable signal conditions in bidirectional inverters, a single circuit is designed to handle all possible scenarios. This circuit requires only a few simple transistors, an optocoupler, and some resistors and capacitors. Through this simple circuitry, various enable signal controls for different circuit conditions are achieved, enabling switchable enable control for isolated, non-isolated, and high / low levels in bidirectional inverters. It boasts advantages such as circuit simplicity, high practicality, and strong compatibility.

[0030] This invention provides an enable control circuit scheme compatible with isolated, non-isolated, and high / low level switchable modes. The first module circuit achieves high-level non-isolated enable control through a voltage divider connected to the third transistor Q3 via resistors R5 (fifth), R11 (eleventh), R14 (fourteenth), and R15 (fifteenth). The second module circuit achieves high-level isolated enable control through a voltage divider connected to the third transistor Q3 via resistor R5 (fifth), optocoupler OT1 (first), R14 (fourteenth), and R15 (fifteenth). The third module circuit achieves low-level non-isolated enable control through transistors Q1, Q2, and Q3, along with their respective resistors and capacitors. The fourth module circuit achieves low-level non-isolated enable control through transistors Q1, Q2, Q3, and their respective resistors and capacitors. By manually disassembling or installing relays or switches, the circuit structure can be adjusted to selectively connect the components, thereby enabling the switching of the four circuit modules.

[0031] Example 1: Detailed Implementation of High-Level Non-Isolated Enable Control

[0032] Please see Figure 2As shown, the AC-EN network is connected to a high-level signal from the host computer's surface control chip. The high-level signal is divided by resistors R5 (5th), R11 (11th), R14 (14th), and R15 (15th) and supplied to the base of transistor Q3. The second capacitor C2 acts as a smoothing filter here. At this time, the base (pin 1) of transistor Q3 is turned on due to the high level, and the collector (pin 2) of transistor Q3 is pulled low. The low level is connected to the microcontroller (inverter controller) through resistor R17 (17th) and the ACEN-MCU network. The collector of transistor Q3 is connected to the 3.3V power supply network of the microcontroller through resistor R16 (16th).

[0033] When the AC-EN network is low or in a high-impedance state, the collector of the third transistor Q3, connected to the 3.3V power supply network through the sixteenth resistor R16, remains at a high level. The microcontroller can determine whether to enable the inverter mode based on the high or low level; that is, the inverter is enabled when the level is high and disabled when the level is low. Specifically, when using the first module circuit, only the fifth, eleventh, fourteenth, and fifteenth resistors, the third transistor, the second capacitor, the sixteenth resistor, and the seventeenth resistor are used; the other components are left unconnected.

[0034] Example 2: Detailed Implementation of High-Level Isolation Enable Control

[0035] Please see Figure 3 As shown, the AC-EN network is connected to a high-level signal from the host computer's surface control chip. The high-level signal is connected to the anode of the first optocoupler OT1 through the fifth resistor R5. The cathode of the first optocoupler OT1 is connected to the isolation ground (port COMGND) through the ninth resistor R9 and the tenth resistor R10. When the signal is high, the collector and emitter of the first optocoupler are conducting. The collector is connected to the BAT+ battery network for power supply through the twelfth resistor R12 and the thirteenth resistor R13. The emitter of the first optocoupler is connected to the base of the third transistor Q3 through the voltage divider of the fourteenth resistor R14 and the fifteenth resistor R15. The second capacitor C2 acts as a smoothing filter here. At this time, the base of the third transistor is conducting due to the high level, and the collector of the third transistor is pulled low. The pulled-low level is connected to the microcontroller through the ACEN-MCU network of the seventeenth resistor R17.

[0036] When the AC-EN network is at a low level or in a high-impedance state, the first optocoupler OT1 is not conducting, preventing the base of the third transistor Q3 from turning on. Since the collector of the third transistor is connected to the 3.3V power supply network through the sixteenth resistor R16, it remains at a high level. The microcontroller can determine whether to enable the inverter mode based on the high or low level; that is, high level enables inverter operation, and low level disables it. Specifically, when using the second module circuit, only the fifth, ninth, tenth, twelfth, thirteenth, fourteenth, fifteenth, sixteenth, and seventeenth resistors, the third transistor, the second capacitor, and the first optocoupler are used; the remaining components are left unconnected.

[0037] Example 3: Detailed Implementation of Low-Level Non-Isolated Enable Control

[0038] Please see Figure 4 As shown, the AC-EN network is connected to a high-level or high-impedance state from the host computer's surface control chip. The high-level and high-impedance states are connected to the base of the first transistor Q1 through the voltage division of the first resistor R1, the second resistor R2, and the third resistor R3, and the high-frequency filtering of the first capacitor C1. The third resistor R3 and the seventh resistor R7 are connected in series to the battery's BAT+ network for power. At this time, the base (pin 1) of the first transistor Q1 is turned on due to the high level, and the collector (pin 2) and emitter (pin 3) of the first transistor are turned on. The collector of the first transistor is connected through the fourth resistor R4 and the seventh resistor R7. Resistor R7 is connected in series to the BAT+ network for power. Its emitter is pulled to ground through resistor R19. Because the collector of the first transistor is connected to the base of the second transistor Q2 through a voltage divider formed by resistors R4 and R6, the low level at the collector of the first transistor prevents the base of the second transistor Q2 from conducting. The collector of the second transistor Q2 is connected to the battery's BAT+ network through resistors R7 and R8, so its collector is high. The emitter of the second transistor is connected to ground through resistors R10 and R18. The collector of the second transistor provides a voltage divider to the base of the third transistor Q3 through resistors R11, R14, and R15. Capacitor C2 acts as a smoothing filter here. Because the base of the third transistor is high, it conducts, and the collector of the third transistor is pulled low. This low level is connected to the ACEN-MCU via the network formed by resistor R17.

[0039] When the AC-EN network is low, the collector of the first transistor is high, the collector of the second transistor is low, and the collector of the third transistor is also high. The microcontroller can determine whether to enable the inverter mode based on the high and low voltage levels; that is, the inverter is enabled when the voltage is low and disabled when the voltage is high. Specifically, when using the third module circuit, the first optocoupler, the fifth resistor, the ninth resistor, the twelfth resistor, and the thirteenth resistor should be left unconnected.

[0040] Example 4: Detailed Implementation of Low-Level Isolation Enable Control

[0041] Please see Figure 5 As shown, the AC-EN network is connected to a high-level or high-impedance state from the host computer's surface control chip. The high-level and high-impedance states are connected to the base of the first transistor Q1 through a voltage divider formed by the first resistor R1, the second resistor R2, and the third resistor R3, and through high-frequency filtering by the first capacitor C1. The third resistor R3 and the seventh resistor R7 are connected in series to the battery's BAT+ network for power. At this time, the base of the first transistor is turned on due to the high level, and the collector and emitter of the first transistor are conducting. The collector of the first transistor is connected in series to the BAT+ network through the fourth resistor R4 and the seventh resistor R7 for power, and the emitter is pulled to ground through the nineteenth resistor R19. Because the collector of the first transistor Q3 is connected to the base of the second transistor Q2 through a voltage divider formed by the fourth resistor R4 and the sixth resistor R6, the low level at the collector of the first transistor Q1 prevents the base of the second transistor Q2 from conducting. The collector of the second transistor Q2 is connected to the battery BAT+ network through the anode of the first optocoupler OT1, the seventh resistor R7, and the eighth resistor R8. At this time, since the base of the second transistor Q2 is not conducting, the collector and emitter of the first optocoupler OT1 are also not conducting. The first optocoupler OT1 provides voltage to the base of the third transistor Q3 through the voltage divider of the fourteenth resistor R14 and the fifteenth resistor R15. The first optocoupler OT1 takes the battery terminal BAT+ network voltage through the twelfth and thirteenth resistors in series. The second capacitor C2 plays a smoothing and filtering role here. At this time, the first optocoupler is not conducting, and the collector of the third transistor is at a high level. The high level is connected to the ACEN-MCU through the network of the seventeenth resistor R17.

[0042] When the AC-EN network is low, the collector of the first transistor is high, the collector of the second transistor is low, and the collector and emitter of the first optocoupler are connected, thus making the collector of the third transistor also high. The microcontroller can determine whether to enable the inverter mode based on the high and low levels; that is, the inverter is enabled when the level is low and disabled when the level is high. Specifically, when using the fourth module circuit, the fifth, ninth, and eleventh resistors are optional.

[0043] In summary, this enable control circuit scheme, which is compatible with isolated, non-isolated, and high / low level switchable modes, is compatible with four types of modular circuits. In circuit application, the four circuit schemes are integrated into one. When drawing the circuit diagram, all of these integrated schemes can be taken into account. According to actual needs, one type of circuit module can be selected for use. This scheme has high integration, which can reduce the number of PCB redesigns and avoid resource waste.

[0044] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An enable control circuit for a bidirectional inverter, characterized in that: This includes the signal input port AC-EN, the signal output port ACEN-MCU, and the power supply port; The signal input port AC-EN is connected to one end of resistor R5 and one end of resistor R1. The other end of resistor R5 is connected to one end of resistor R8, one end of resistor R11, and the anode of optocoupler OT1. The other end of resistor R8 is connected to one end of resistor R7, one end of resistor R4, and one end of resistor R3. The other end of resistor R7 is connected to the power supply port. The other end of resistor R1 is connected to one end of capacitor C1, one end of resistor R2, the other end of resistor R3, and the base of transistor Q1. The collector of transistor Q1 is connected to resistor R4. The other end, one end of resistor R6 and the base of transistor Q2, the collector of transistor Q2 is connected to the cathode of optocoupler OT1 and one end of resistor R9, the other end of resistor R9 is connected to the emitter of transistor Q2, one end of resistor R10, the other end of resistor R6, the emitter of transistor Q1, one end of resistor R19, the other end of resistor R2 and the other end of capacitor C1, the other end of resistor R10 is connected to one end of resistor R18 and port COMGND, the other end of resistor R18 is connected to the other end of resistor R19 and port AGND; The signal output port ACEN-MCU is connected to one end of resistor R17. The other end of resistor R17 is connected to one end of resistor R16 and the collector of transistor Q3. The other end of resistor R16 is connected to port MCU-GND. The base of transistor Q3 is connected to one end of resistor R15, one end of capacitor C2, and one end of resistor R14. The emitter of transistor Q3, the other end of resistor R15, and the other end of capacitor C2 are connected to port AGND. The other end of resistor R14 is connected to the emitter of optocoupler OT1 and the other end of resistor R11. The collector of optocoupler OT1 is connected to the power supply port through resistors R13 and R12.

2. The enable control circuit for a bidirectional inverter according to claim 1, characterized in that: The signal input port AC-EN is connected to the external control panel of the inverter energy storage device, the signal output port ACEN-MCU is connected to the built-in microcontroller MCU of the inverter energy storage device, and the port MCU-GND is connected to the power supply port of the microcontroller MCU.

3. The enable control circuit for a bidirectional inverter according to claim 1, characterized in that: The power port is connected to the battery.

4. The enable control circuit for a bidirectional inverter according to claim 1, characterized in that: The port AGND is grounded, and the port COMGND is connected to isolation ground.

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