Power supply conversion inverter circuit

Abstract

The invention discloses a power conversion inverter circuit which comprises a power supply circuit (1), a booster circuit (2), an inverter circuit (3) and a management control module (4). The input end of the power supply circuit (1) is connected with a direct-current power supply, and the output end of the power supply circuit (1) is connected with the booster circuit (2); the output end of the booster circuit (2) is connected with the inverter circuit (3); the management control module (4) is respectively connected with the booster circuit (2) and the inverter circuit (3); the management control module (4) outputs a voltage control signal to the booster circuit (2) and outputs a corresponding feedback control signal to the inverter circuit (3) by acquiring working state information of the booster circuit (2) and the inverter circuit (3); according to the invention, efficient current conversion can be carried out, and each circuit is managed and controlled to further improve the energy utilization efficiency.

Description

Technical Field

[0001] The present invention relates to the field of inverters, and in particular to a power conversion inverter circuit. Background Art

[0002] An inverter is a converter that converts DC power into constant frequency and voltage or frequency and voltage regulated AC power. There are many problems in the process of converting DC power into AC power. First, existing inverters generally use forward inverter circuits with large losses, which not only affects the conversion efficiency of electric energy, but also increases the operating cost of the equipment. From the perspective of management and control, traditional inverters usually do not have intelligent management functions and cannot automatically adjust key parameters such as output power and voltage according to changes in actual load. This fixed mode of operation makes energy utilization inefficient, especially when facing large fluctuations in electricity demand. For example, when electricity consumption decreases at night, if the inverter cannot reduce its working intensity accordingly, it will cause unnecessary energy waste; vice versa, power shortages may occur during peak hours during the day. Summary of the invention

[0003] The purpose of the present invention is to provide a power conversion inverter circuit. The present invention can perform efficient current conversion and manage and control each circuit to further improve energy utilization efficiency.

[0004] The technical solution provided by the present invention is as follows: a power conversion inverter circuit, comprising a power supply circuit, a boost circuit, an inverter circuit and a management control module; the power supply circuit is connected to the power supply and is used for the input of a DC power supply; the management control module is connected to the boost circuit and the inverter circuit, obtains the working state information of the boost circuit and the inverter circuit, outputs a voltage control signal to the boost circuit, and outputs a corresponding feedback control signal to the inverter circuit; the boost circuit performs a corresponding value boost processing on the DC power supply according to the voltage control signal; the inverter circuit is a full-bridge circuit with a topological structure and is connected to the boost circuit, and after receiving the feedback control signal, the switching of the circuit conduction is realized by the opening and closing combination of the switch tube on its bridge arm, and then the boosted DC power is output as AC power of the corresponding frequency.

[0005] In the above-mentioned power conversion inverter circuit, the power supply circuit includes an electrolytic capacitor E1, an electrolytic capacitor E2, an electrolytic capacitor E3 and an electrolytic capacitor E5; the negative electrodes of the electrolytic capacitors E1, E2, E3 and E5 are all connected to the signal ground, and the positive electrodes of the electrolytic capacitors E1, E2, E3 and E5 are respectively connected to the positive electrode of the DC power supply and the boost circuit.

[0006] In the aforementioned power conversion inverter circuit, the power supply circuit also includes a fuse group; the positive electrodes of the electrolytic capacitors E1, E2, E3 and E5 are connected to the positive electrode of the DC power supply via the fuse group; the fuse group consists of a fuse F1, a fuse F2, a fuse F3 and a fuse F4 connected in parallel.

[0007] In the aforementioned power conversion inverter circuit, the boost circuit includes a transformer T1, a transformer T2, a capacitor C1, a capacitor C2 and a current transformer TA, and the input sides of the transformer T1 and the transformer T2 are both connected to the power supply circuit; one end of the output side coil of the transformer T1 is connected to one end of the capacitor C1; one end of the output side coil of the transformer T2 is connected to one end of the capacitor C12; the other end of the capacitor C1 and the other end of the capacitor C12 are both connected to the current transformer TA, the current transformer TA is connected to the management and control module, and the other end of the output side coil of the transformer T1 and the other end of the output side coil of the transformer T2 are both connected to the inverter circuit.

[0008] In the aforementioned power conversion inverter circuit, the boost circuit further includes a diode D3, a diode D4, a diode D5, a diode D6, a resistor R6, a resistor R31, a resistor R34, a resistor R35, a resistor R38, a resistor R51, a resistor R52, a resistor R54, a resistor R59, a resistor R60, a resistor R74, a resistor R76, a capacitor C17, a capacitor C3, an NMOS tube Q5, an NMOS tube Q6, an NMOS tube Q9, an NMOS tube Q10, an NMOS tube Q11, an NMOS tube Q12, an NMOS tube Q13, and an NMOS tube Q14; the tap on the input side of the transformer T1 is connected to the output end of the power supply circuit, and one end of the coil on the input side of the transformer T1 is connected to the positive electrode of the diode D3. , the drain of NMOS tube Q6 and the drain of NMOS tube Q5, the other end of the coil on the input side of transformer T1 is connected to the positive electrode of diode D4, the drain of NMOS tube Q10 and the drain of NMOS tube Q9, the negative electrodes of diode D3 and diode D4 are connected to one end of resistor R51, the other end of resistor R51 is connected to the tap on the input side of transformer T1, capacitor C17 is connected in parallel to both ends of resistor R51; the source of NMOS tube Q6 is connected to the signal ground and connected to one end of resistor R31, the gate of NMOS tube Q6 is connected to one end of resistor R34, the other end of resistor R34 is connected to the signal ground and connected to the other end of resistor R31, the source of NMOS tube Q5 is connected to the signal ground, the gate of NMOS tube Q5 is connected to one end of resistor R54 end, the other end of the resistor R54 is connected to the signal ground and connected to the PWM port of the management and control module; the source of the NMOS tube Q10 is connected to the signal ground and connected to one end of the resistor R6, the gate of the NMOS tube Q10 is connected to one end of the resistor R35, the other end of the resistor R35 is connected to the signal ground and connected to the other end of the resistor R6, the source of the NMOS tube Q9 is connected to the signal ground, the gate of the NMOS tube Q9 is connected to one end of the resistor R38, the other end of the resistor R38 is connected to the signal ground and connected to the PWM port of the management and control module; the tap on the input side of the transformer T2 is connected to the output end of the power supply circuit, one end of the coil on the input side of the transformer T2 is connected to the positive electrode of the diode D5, the drain of the NMOS tube Q12 and the drain of the NMOS tube Q14, The other end of the coil on the input side of the transformer T2 is connected to the positive electrode of the diode D6, the drain of the NMOS tube Q14 and the drain of the NMOS tube Q13, the negative electrodes of the diode D5 and the diode D6 are connected to one end of the resistor R52, the other end of the resistor R52 is connected to the tap on the input side of the transformer T2, and the capacitor C3 is connected in parallel to both ends of the resistor R52; the source of the NMOS tube Q12 is connected to the signal ground and connected to one end of the resistor R76, the gate of the NMOS tube Q12 is connected to one end of the resistor R76, and the other end of the resistor R76 is connected to the signal ground, the source of the NMOS tube Q11 is connected to the signal ground, the gate of the NMOS tube Q11 is connected to one end of the resistor R59, and the other end of the resistor R59 is connected to the signal ground and connected to the PWM port of the management control module;The source of the NMOS tube Q14 is connected to the signal ground, the gate of the NMOS tube Q14 is connected to one end of the resistor R60, the other end of the resistor R60 is connected to the signal ground, the source of the NMOS tube Q13 is connected to the signal ground, the gate of the NMOS tube Q13 is connected to one end of the resistor R74, the other end of the resistor R74 is connected to the signal ground and connected to the PWM port of the management control module.;

[0009] In the aforementioned power conversion inverter circuit, the inverter circuit includes a current transformer CT, a capacitor C31, a resistor R8, a resistor R9, a resistor R11, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R19, a resistor R32, a resistor R33, a resistor R36, a resistor R37, a resistor R53, a diode D8, a diode D9, a diode D10, a diode D11, an IGBT tube Q1, an IGBT tube Q2, an IGBT tube Q3, an IGBT tube Q4, an AC output terminal AC1 and an AC output terminal AC2; the I The collector of GBT tube Q1 and the collector of IGBT tube Q2 are connected to the boost circuit, the gate of IGBT tube Q1 is connected to resistor R16, resistor R14 and one end of resistor R37, the other end of resistor R16 is connected to the cathode of diode D9 and the management control module, the other end of resistor R37 is connected to the anode of diode D9, the emitter of IGBT tube Q1 is connected to the other end of resistor R14, the collector of IGBT tube Q4 and the AC output terminal AC2; the gate of IGBT tube Q2 is connected to resistor R9, resistor R11 and one end of resistor R32, the other end of resistor R9 is connected to The cathode of diode D8 is connected to the management control module, the other end of resistor R32 is connected to the anode of diode D8, the emitter of IGBT tube Q2 is connected to the other end of resistor R11, the collector of IGBT tube Q3 and the AC output terminal AC1; the emitter of IGBT tube Q3 is connected to one end of resistor R53 and one end of resistor R13, the other end of resistor R53 is grounded, the gate of IGBT tube Q3 is connected to one end of resistor R8, the other end of resistor R13 and one end of resistor R33, the other end of resistor R8 is connected to the management control module and the cathode of diode D10, diode D1 The positive electrode of IGBT Q3 is connected to the other end of resistor R33; the emitter of IGBT Q4 is connected to one end of resistor R19 and one end of resistor R15, the other end of resistor R19 is grounded, the gate of IGBT Q4 is connected to one end of resistor R17, the other end of resistor R15 and one end of resistor R36, the other end of resistor R17 is connected to the management control module and the cathode of diode D11, and the positive electrode of diode D11 is connected to the other end of resistor R36; the emitters of IGBT Q3 and IGBT Q4 are connected to one end of current transformer CT, and the other end of current transformer CT is grounded.

[0010] The aforementioned power conversion inverter circuit also includes a voltage suppression diode TVS1, a voltage suppression diode TVS2, a voltage suppression diode TVS3, a voltage suppression diode TVS4, a voltage suppressor diode ZD7 and a voltage suppressor diode ZD2; the voltage suppression diode TVS1 is connected in parallel to the collector and emitter of the IGBT tube Q2, the voltage suppression diode TVS2 is connected in parallel to the collector and emitter of the IGBT tube Q1, the voltage suppression diode TVS3 is connected in parallel to the collector and emitter of the IGBT tube Q3, and the The voltage suppression diode TVS4 is connected in parallel to the collector and emitter of the IGBT tube Q4; the positive electrode of the voltage stabilizing diode ZD7 is connected to the emitter of the IGBT tube Q3, and the negative electrode of the voltage stabilizing diode ZD7 is connected to the gate of the IGBT tube Q3; the positive electrode of the voltage stabilizing diode ZD2 is connected to the emitter of the IGBT tube Q4, and the negative electrode of the voltage stabilizing diode ZD7 is connected to the gate of the IGBT tube Q4; diodes are connected between the collector and emitter of the IGBT tubes Q1, Q2, Q3 and Q4.

[0011] In the aforementioned power conversion inverter circuit, the output end of the inverter circuit is connected to a filter circuit.

[0012] In the aforementioned power conversion inverter circuit, the management control module has a wireless communication function.

[0013] Compared with the prior art, the power supply circuit of the present invention provides direct current, and the boost circuit performs a corresponding value boost processing on the direct current power supply according to the voltage control signal of the management control module. After receiving the feedback control signal of the management control module, the inverter circuit realizes the switching of the circuit conduction through the opening and closing combination of the switch tubes on the full-bridge circuit, and then outputs the boosted direct current as alternating current of the corresponding frequency. The management control module obtains the working status information of the boost circuit and the inverter circuit, outputs a voltage control signal to the boost circuit, and outputs a corresponding feedback control signal to the inverter circuit. The output of the boost circuit and the inverter circuit can be dynamically adjusted according to the current load of the circuit, thereby improving energy utilization efficiency. At the same time, the inverter circuit is a full-bridge circuit with a topological structure, which can perform efficient power conversion, further improving circuit efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a connection schematic diagram of the present invention;

[0015] Figure 2 A circuit diagram of a power supply circuit of the present invention;

[0016] Figure 3 The circuit diagram of the boost circuit of the present invention is

[0017] Figure 4 The circuit diagram of the inverter circuit of the present invention is

[0018] The markings in the attached drawings are: 1. power supply circuit; 2. boost circuit; 3. inverter circuit; 4. management control module; 5. filter circuit; 6. fuse group. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the embodiments and drawings, but they are not intended to limit the present invention.

[0020] Embodiment: A power conversion inverter circuit, as shown in the attached Figure 1 As shown, it includes a power supply circuit 1, a boost circuit 2, an inverter circuit 3 and a management control module 4; the input end of the power supply circuit 1 is connected to a DC power supply, and the output end of the power supply circuit 1 is connected to the boost circuit 2; the output end of the boost circuit 2 is connected to the inverter circuit 3; the management control module 4 is connected to the boost circuit 2 and the inverter circuit 3 respectively; the management control module 4 outputs a voltage control signal to the boost circuit 2 and a corresponding feedback control signal to the inverter circuit 3 by acquiring the working state information of the boost circuit 2 and the inverter circuit 3; the boost circuit 2 performs a corresponding value boost processing on the DC power output by the power supply circuit 1 according to the voltage control signal; the inverter circuit 3 is a full-bridge circuit with a topological structure, and after receiving the feedback control signal, the inverter circuit 3 realizes the switching of the circuit conduction through the opening and closing combination of the switch tube on the full-bridge circuit, and then outputs the boosted DC power as AC power of the corresponding frequency.

[0021] As attached Figure 2 As shown, the power supply circuit 1 includes an electrolytic capacitor E1, an electrolytic capacitor E2, an electrolytic capacitor E3 and an electrolytic capacitor E5; the negative electrodes of the electrolytic capacitors E1, E2, E3 and E5 are all connected to the signal ground, the positive electrodes of the electrolytic capacitors E1, E2, E3 and E5 are respectively connected to the positive electrode of the DC power supply and the boost circuit 2, and the negative electrode of the DC power supply is connected to the signal ground; the power supply circuit 1 also includes a fuse group 6; the positive electrodes of the electrolytic capacitors E1, E2, E3 and E5 are connected to the positive electrode of the DC power supply via the fuse group 6; the fuse group 6 consists of fuses F1, F2, F3 and F4 connected in parallel, and when the circuit is overloaded, it can be blown in time to protect the circuit and achieve overload protection.

[0022] As attached Figure 3As shown, the boost circuit 2 includes a transformer T1, a transformer T2, a capacitor C1, a capacitor C2 and a current transformer TA, the input sides of the transformer T1 and the transformer T2 are both connected to the power supply circuit 1; one end of the output side coil of the transformer T1 is connected to one end of the capacitor C1; one end of the output side coil of the transformer T2 is connected to one end of the capacitor C12; the other end of the capacitor C1 and the other end of the capacitor C12 are both connected to the current transformer TA, the current transformer TA is connected to the management control module, the other end of the output side coil of the transformer T1 and the other end of the output side coil of the transformer T2 are both connected to the inverter circuit; the boost circuit 2 also includes a diode D3, diode D4, diode D5, diode D6, resistor R6, resistor R31, resistor R34, resistor R35, resistor R38, resistor R51, resistor R52, resistor R54, resistor R59, resistor R60, resistor R74, resistor R76, capacitor C17, capacitor C3, NMOS transistor Q5, NMOS transistor Q6, NMOS transistor Q9, NMOS transistor Q10, NMOS transistor Q11, NMOS transistor Q12, NMOS transistor Q13, NMOS transistor Q14; the tap on the input side of the transformer T1 is connected to the output end of the power supply circuit 1, and one end of the coil on the input side of the transformer T1 is connected to the diode The positive electrode of the transistor D3, the drain of the NMOS transistor Q6 and the drain of the NMOS transistor Q5, the other end of the coil on the input side of the transformer T1 is connected to the positive electrode of the diode D4, the drain of the NMOS transistor Q10 and the drain of the NMOS transistor Q9, the negative electrodes of the diodes D3 and D4 are connected to one end of the resistor R51, the other end of the resistor R51 is connected to the tap on the input side of the transformer T1, and the capacitor C17 is connected in parallel to both ends of the resistor R51; the source of the NMOS transistor Q6 is connected to the signal ground and connected to one end of the resistor R31, the gate of the NMOS transistor Q6 is connected to one end of the resistor R34, the other end of the resistor R34 is connected to the signal ground and connected to the other end of the resistor R31 end, the source of the NMOS tube Q5 is connected to the signal ground, the gate of the NMOS tube Q5 is connected to one end of the resistor R54, the other end of the resistor R54 is connected to the signal ground and connected to the PWM1 port of the management control module 4; the source of the NMOS tube Q10 is connected to the signal ground and connected to one end of the resistor R6, the gate of the NMOS tube Q10 is connected to one end of the resistor R35, the other end of the resistor R35 is connected to the signal ground and connected to the other end of the resistor R6, the source of the NMOS tube Q9 is connected to the signal ground, the gate of the NMOS tube Q9 is connected to one end of the resistor R38, the other end of the resistor R38 is connected to the signal ground and connected to the PWM2 port of the management control module 4;The tap on the input side of the transformer T2 is connected to the output end of the power supply circuit 1, one end of the coil on the input side of the transformer T2 is connected to the positive electrode of the diode D5, the drain of the NMOS tube Q12 and the drain of the NMOS tube Q14, the other end of the coil on the input side of the transformer T2 is connected to the positive electrode of the diode D6, the drain of the NMOS tube Q14 and the drain of the NMOS tube Q13, the negative electrodes of the diode D5 and the diode D6 are connected to one end of the resistor R52, the other end of the resistor R52 is connected to the tap on the input side of the transformer T2, and the capacitor C3 is connected in parallel to both ends of the resistor R52; the source of the NMOS tube Q12 is connected to the signal ground and connected to one end of the resistor R76, the gate of the NMOS tube Q12 is connected to one end of the resistor R76, the other end of the resistor R76 is connected to the signal ground, the source of the NMOS tube Q11 is connected to the signal ground, and the gate of the NMOS tube Q12 is connected to one end of the resistor R76. The gate of the NMOS tube Q11 is connected to one end of the resistor R59, and the other end of the resistor R59 is connected to the signal ground and connected to the PWM1 port of the management control module 4; the source of the NMOS tube Q14 is connected to the signal ground, the gate of the NMOS tube Q14 is connected to one end of the resistor R60, and the other end of the resistor R60 is connected to the signal ground, the source of the NMOS tube Q13 is connected to the signal ground, the gate of the NMOS tube Q13 is connected to one end of the resistor R74, and the other end of the resistor R74 is connected to the signal ground and connected to the PWM2 port of the management control module 4; the management control module obtains the output state information of the boost circuit through the current transformer TA, and then outputs a voltage control signal through the PWM port to control the conduction of the corresponding NMOS tube and then control the size of the input voltage to obtain output voltages of different sizes. ;

[0023] As attached Figure 4As shown, the inverter circuit 3 includes a current transformer CT, a capacitor C31, a resistor R8, a resistor R9, a resistor R11, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R19, a resistor R32, a resistor R33, a resistor R36, a resistor R37, a resistor R53, a diode D8, a diode D9, a diode D10, a diode D11, an IGBT tube Q1, an IGBT tube Q2, an IGBT tube Q3, an IGBT tube Q4, an AC output terminal AC1 and an AC output terminal AC2; the collector of the IGBT tube Q1 and the collector of the IGBT tube Q2 are connected to the boost circuit 2, and the IGB The gate of the IGBT tube Q1 is connected to one end of the resistor R16, the resistor R14 and the resistor R37, the other end of the resistor R16 is connected to the cathode of the diode D9 and the management control module 4HD2, the other end of the resistor R37 is connected to the anode of the diode D9, the emitter of the IGBT tube Q1 is connected to the other end of the resistor R14, the collector of the IGBT tube Q4 and the AC output terminal AC2; the gate of the IGBT tube Q2 is connected to one end of the resistor R9, the resistor R11 and the resistor R32, the other end of the resistor R9 is connected to the cathode of the diode D8 and the management control module 4HD1, the other end of the resistor R32 is connected to the anode of the diode D8, the emitter of the IGBT tube Q2 is connected to the other end of the resistor R14, the collector of the IGBT tube Q4 and the AC output terminal AC2. The gate of the IGBT tube Q3 is connected to the other end of the resistor R11, the collector of the IGBT tube Q3 and the AC output terminal AC1; the emitter of the IGBT tube Q3 is connected to one end of the resistor R53 and one end of the resistor R13, and the other end of the resistor R53 is grounded. The gate of the IGBT tube Q3 is connected to one end of the resistor R8, the other end of the resistor R13 and one end of the resistor R33. The other end of the resistor R8 is connected to the management control module 4LD1 and the cathode of the diode D10, and the anode of the diode D10 is connected to the other end of the resistor R33; the emitter of the IGBT tube Q4 is connected to one end of the resistor R19 and one end of the resistor R15, and the other end of the resistor R19 is grounded. The gate of tube Q4 is connected to one end of resistor R17, the other end of resistor R15 and one end of resistor R36. The other end of resistor R17 is connected to management control module 4LD2 and the cathode of diode D11. The anode of diode D11 is connected to the other end of resistor R36. The emitters of IGBT tubes Q3 and Q4 are connected to one end of current transformer CT, and the other end of current transformer CT is grounded. The management control module obtains the state information in the inverter circuit through the current transformer CT, and controls the on and off of each IGBT tube through the port output voltage control signal to change the current direction to realize the output of corresponding frequency AC. The voltage control signal includes 20KHz SVPM square wave and 50Hz SVPM square wave, wherein the duty cycle of SVPWM is obtained by the following formula:

[0024]

[0025] In the formula, ton is the on-time, that is, the duty cycle; Tc is the carrier period; M is the modulation index; k is the index of the current sampling point or the switching cycle; N is the number of switching cycles in each carrier period; this scheme divides a cycle of the sine wave into 400 points, controls the output amplitude height of each point, modulates the output waveform to a sine wave, manages the output waveform of the control module, and fine-tunes the duty cycle of each point to make the waveform distortion rate less than 3%.

[0026] The inverter circuit 3 also includes voltage suppression diodes TVS1, TVS2, TVS3, TVS4, Zener diodes ZD7 and ZD2; the voltage suppression diode TVS1 is connected in parallel to the collector and emitter of the IGBT tube Q2, the voltage suppression diode TVS2 is connected in parallel to the collector and emitter of the IGBT tube Q1, the voltage suppression diode TVS3 is connected in parallel to the collector and emitter of the IGBT tube Q3, and the voltage suppression diodes TVS4 are connected in parallel to the collector and emitter of the IGBT tube Q3. VS4 is connected in parallel to the collector and emitter of the IGBT tube Q4; the anode of the voltage regulator diode ZD7 is connected to the emitter of the IGBT tube Q3, and the cathode of the voltage regulator diode ZD7 is connected to the gate of the IGBT tube Q3; the anode of the voltage regulator diode ZD2 is connected to the emitter of the IGBT tube Q4, and the cathode of the voltage regulator diode ZD7 is connected to the gate of the IGBT tube Q4; diodes are connected between the collector and emitter of the IGBT tubes Q1, Q2, Q3 and Q4 to improve the stability of the circuit.

[0027] The output end of the inverter circuit 4 is connected to a filter circuit 5, which adopts a capacitor filter circuit. The specific circuit structure is a technical means well known and mastered by technical personnel in this field, and will not be repeated here. It can filter out the high-frequency components in the output current to obtain a cleaner radio wave.

[0028] The management control module 4 is a PCB circuit board, which is integrated with corresponding processing chips and other electronic devices. The PCB circuit board is integrated with a BT3L Bluetooth module. Through the link between the module and the gateway, the basic information of the inverter voltage, current and power can be displayed on the user side. The management control module is also connected to the power switch. When the circuit current voltage is detected to be suddenly changed to the corresponding threshold due to impact load, short circuit, overvoltage and undervoltage, the power supply can be controlled to cut off to protect the current, realize anti-impact, short circuit protection and overvoltage and undervoltage protection. A fan connected to the management control module is also provided outside the inverter. When the detected temperature is higher than the threshold, the user side is warned and the fan is turned on to cool down. The above threshold comparison is realized by comparing the pins of the operational amplifier and outputting the corresponding high and low levels; in addition, this embodiment adopts an intermittent bus voltage stabilization scheme to ensure that the average current is less than 0.3A when unloaded. When the medium load or full load, the bus voltage stabilization is released, and the bus voltage is increased to more than 400V. The bus voltage increases, but the voltage drop on the IGBT tube is constant, so the efficiency is improved.

[0029] To summarize, the power supply circuit provides direct current, the boost circuit performs a corresponding value boost processing on the direct current power supply according to the voltage control signal of the management and control module, and the inverter circuit receives the feedback control signal of the management and control module and realizes the switching of the circuit conduction through the opening and closing combination of the switch tube on its bridge arm, and then outputs the boosted direct current as alternating current of the corresponding frequency. The management and control module obtains the working status information of the boost circuit and the inverter circuit, outputs a voltage control signal to the boost circuit, and outputs a corresponding feedback control signal to the inverter circuit. The output of the boost circuit and the inverter circuit can be dynamically adjusted according to the current load of the circuit to improve energy utilization efficiency. At the same time, the inverter circuit is a full-bridge circuit with a topological structure, which can perform efficient electric energy conversion and further improve circuit efficiency. In addition, the fault condition can be quickly judged and protection signals of different levels can be issued to ensure safe and reliable operation of the system.

Claims

1. A power conversion inverter circuit, characterized in that: The invention comprises a power supply circuit (1), a boost circuit (2), an inverter circuit (3) and a management control module (4); the input end of the power supply circuit (1) is connected to a direct current power supply, and the output end of the power supply circuit (1) is connected to the boost circuit (2); the output end of the boost circuit (2) is connected to the inverter circuit (3); the management control module (4) is connected to the boost circuit (2) and the inverter circuit (3) respectively; the management control module (4) outputs a voltage control signal to the boost circuit (2) and outputs a corresponding feedback control signal to the inverter circuit (3) by acquiring working state information of the boost circuit (2) and the inverter circuit (3); the boost circuit (2) performs a corresponding value boost processing on the direct current output by the power supply circuit (1) according to the voltage control signal; the inverter circuit (3) is a full-bridge circuit with a topological structure; after receiving the feedback control signal, the inverter circuit (3) realizes the switching of the circuit conduction by the opening and closing combination of the switch tube on the full-bridge circuit, and then outputs the boosted direct current as alternating current of the corresponding frequency.

2. The power conversion inverter circuit according to claim 1, characterized in that: The power supply circuit (1) comprises an electrolytic capacitor E1, an electrolytic capacitor E2, an electrolytic capacitor E3 and an electrolytic capacitor E5; The negative electrodes of the electrolytic capacitors E1, E2, E3 and E5 are all connected to the signal ground, and the positive electrodes of the electrolytic capacitors E1, E2, E3 and E5 are respectively connected to the positive electrode of the DC power supply and the boost circuit (2).

3. The power conversion inverter circuit according to claim 2, characterized in that: The power supply circuit (1) further comprises a fuse group (6); the positive electrodes of the electrolytic capacitors E1, E2, E3 and E5 are connected to the positive electrode of the DC power supply via the fuse group (6); the fuse group (6) comprises a fuse F1, a fuse F2, a fuse F3 and a fuse F4 connected in parallel.

4. The power conversion inverter circuit according to claim 1, characterized in that: The boost circuit (2) comprises a transformer T1, a transformer T2, a capacitor C1, a capacitor C2 and a current transformer TA, wherein the input sides of the transformer T1 and the transformer T2 are both connected to the power supply circuit (1); one end of the output side coil of the transformer T1 is connected to one end of the capacitor C1; one end of the output side coil of the transformer T2 is connected to one end of the capacitor C12; the other end of the capacitor C1 and the other end of the capacitor C12 are both connected to the current transformer TA, the current transformer TA is connected to the management control module (4), and the other end of the output side coil of the transformer T1 and the other end of the output side coil of the transformer T2 are both connected to the inverter circuit.

5. The power conversion inverter circuit according to claim 4, characterized in that: The boost circuit (2) further comprises a diode D3, a diode D4, a diode D5, a diode D6, a resistor R6, a resistor R31, a resistor R34, a resistor R35, a resistor R38, a resistor R51, a resistor R52, a resistor R54, a resistor R59, a resistor R60, a resistor R74, a resistor R76, a capacitor C17, a capacitor C3, an NMOS transistor Q5, an NMOS transistor Q6, an NMOS transistor Q9, an NMOS transistor Q10, an NMOS transistor Q11, an NMOS transistor Q12, an NMOS transistor Q13, and an NMOS transistor Q14; the tap on the input side of the transformer T1 is connected to the output end of the power supply circuit (1), and one end of the coil on the input side of the transformer T1 is connected to the positive electrode of the diode D3, the positive electrode of the NMOS transistor Q6, and the positive electrode of the NMOS transistor Q6. The drain of the NMOS tube Q5 is connected to the positive electrode of the diode D4, the drain of the NMOS tube Q10 and the drain of the NMOS tube Q9, the negative electrodes of the diodes D3 and D4 are connected to one end of the resistor R51, the other end of the resistor R51 is connected to the tap of the input side of the transformer T1, and the capacitor C17 is connected in parallel to both ends of the resistor R51; the source of the NMOS tube Q6 is connected to the signal ground and connected to one end of the resistor R31, the gate of the NMOS tube Q6 is connected to one end of the resistor R34, the other end of the resistor R34 is connected to the signal ground and connected to the other end of the resistor R31, the source of the NMOS tube Q5 is connected to the signal ground, the gate of the NMOS tube Q5 is connected to one end of the resistor R54, the other end of the resistor R54 is connected to the signal ground. The terminal is connected to the signal ground and connected to the PWM port of the management control module (4); the source of the NMOS tube Q10 is connected to the signal ground and connected to one end of the resistor R6, the gate of the NMOS tube Q10 is connected to one end of the resistor R35, the other end of the resistor R35 is connected to the signal ground and connected to the other end of the resistor R6, the source of the NMOS tube Q9 is connected to the signal ground, the gate of the NMOS tube Q9 is connected to one end of the resistor R38, the other end of the resistor R38 is connected to the signal ground and connected to the PWM port of the management control module (4); the tap on the input side of the transformer T2 is connected to the output end of the power supply circuit (1), one end of the coil on the input side of the transformer T2 is connected to the positive electrode of the diode D5, the drain of the NMOS tube Q12 and the drain of the NMOS tube Q14, and the transformer The other end of the coil on the input side of the transformer T2 is connected to the positive electrode of the diode D6, the drain of the NMOS tube Q14 and the drain of the NMOS tube Q13, the negative electrodes of the diodes D5 and D6 are connected to one end of the resistor R52, the other end of the resistor R52 is connected to the tap on the input side of the transformer T2, and the capacitor C3 is connected in parallel to both ends of the resistor R52; the source of the NMOS tube Q12 is connected to the signal ground and connected to one end of the resistor R76, the gate of the NMOS tube Q12 is connected to one end of the resistor R76, the other end of the resistor R76 is connected to the signal ground, the source of the NMOS tube Q11 is connected to the signal ground, the gate of the NMOS tube Q11 is connected to one end of the resistor R59, the other end of the resistor R59 is connected to the signal ground and connected to the PWM port of the management control module (4);The source of the NMOS tube Q14 is connected to the signal ground, the gate of the NMOS tube Q14 is connected to one end of the resistor R60, the other end of the resistor R60 is connected to the signal ground, the source of the NMOS tube Q13 is connected to the signal ground, the gate of the NMOS tube Q13 is connected to one end of the resistor R74, the other end of the resistor R74 is connected to the signal ground and connected to the PWM port of the management control module (4).

6. The power conversion inverter circuit according to claim 1, characterized in that: The inverter circuit (3) comprises a current transformer CT, a capacitor C31, a resistor R8, a resistor R9, a resistor R11, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R19, a resistor R32, a resistor R33, a resistor R36, a resistor R37, a resistor R53, a diode D8, a diode D9, a diode D10, a diode D11, an IGBT tube Q1, an IGBT tube Q2, an IGBT tube Q3, an IGBT tube Q4, an AC output terminal AC1 and an AC output terminal AC2; the collector of the IGBT tube Q1 and the IGBT tube Q3 are connected to the AC output terminal AC2; The collector of the IGBT tube Q2 is connected to the boost circuit (2); the gate of the IGBT tube Q1 is connected to the resistor R16, the resistor R14 and one end of the resistor R37; the other end of the resistor R16 is connected to the cathode of the diode D9 and the management control module (4); the other end of the resistor R37 is connected to the anode of the diode D9; the emitter of the IGBT tube Q1 is connected to the other end of the resistor R14, the collector of the IGBT tube Q4 and the AC output terminal AC2; the gate of the IGBT tube Q2 is connected to the resistor R9, the resistor R11 and one end of the resistor R32; the other end of the resistor R9 is connected to the cathode of the diode D8; The gate of the IGBT tube Q3 is connected to one end of the resistor R8, the other end of the resistor R13 and one end of the resistor R33. The other end of the resistor R8 is connected to the management control module (4) and the positive electrode of the diode D8. The emitter of the IGBT tube Q2 is connected to the other end of the resistor R11, the collector of the IGBT tube Q3 and the AC output terminal AC1. The emitter of the IGBT tube Q3 is connected to one end of the resistor R53 and one end of the resistor R13. The other end of the resistor R53 is grounded. The gate of the IGBT tube Q3 is connected to one end of the resistor R8, the other end of the resistor R13 and one end of the resistor R33. The other end of the resistor R8 is connected to the management control module (4) and the negative electrode of the diode D10. The positive electrode is connected to the other end of the resistor R33; the emitter of the IGBT tube Q4 is connected to one end of the resistor R19 and one end of the resistor R15, the other end of the resistor R19 is grounded, the gate of the IGBT tube Q4 is connected to one end of the resistor R17, the other end of the resistor R15 and one end of the resistor R36, the other end of the resistor R17 is connected to the management control module (4) and the cathode of the diode D11, and the positive electrode of the diode D11 is connected to the other end of the resistor R36; the emitters of the IGBT tubes Q3 and Q4 are connected to one end of the current transformer CT, and the other end of the current transformer CT is grounded.

7. The power conversion inverter circuit according to claim 6, characterized in that: The inverter circuit (3) further comprises a voltage suppression diode TVS1, a voltage suppression diode TVS2, a voltage suppression diode TVS3, a voltage suppression diode TVS4, a voltage suppressor diode ZD7 and a voltage suppressor diode ZD2; the voltage suppression diode TVS1 is connected in parallel to the collector and emitter of the IGBT tube Q2, the voltage suppression diode TVS2 is connected in parallel to the collector and emitter of the IGBT tube Q1, the voltage suppression diode TVS3 is connected in parallel to the collector and emitter of the IGBT tube Q3, and the voltage The suppression diode TVS4 is connected in parallel to the collector and emitter of the IGBT tube Q4; the anode of the voltage stabilizing diode ZD7 is connected to the emitter of the IGBT tube Q3, and the cathode of the voltage stabilizing diode ZD7 is connected to the gate of the IGBT tube Q3; the anode of the voltage stabilizing diode ZD2 is connected to the emitter of the IGBT tube Q4, and the cathode of the voltage stabilizing diode ZD7 is connected to the gate of the IGBT tube Q4; diodes are connected between the collector and emitter of the IGBT tubes Q1, Q2, Q3 and Q4.

8. The power conversion inverter circuit according to claim 1, characterized in that: The output end of the inverter circuit (4) is connected to a filter circuit (5).

9. The power conversion inverter circuit according to claim 1, characterized in that: The management control module (4) has a wireless communication function.

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