CN117914174A - Resonant boost inverter circuit, module and method - Google Patents

Resonant boost inverter circuit, module and method Download PDF

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Publication number
CN117914174A
CN117914174A CN202311804048.3A CN202311804048A CN117914174A CN 117914174 A CN117914174 A CN 117914174A CN 202311804048 A CN202311804048 A CN 202311804048A CN 117914174 A CN117914174 A CN 117914174A
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China
Prior art keywords
circuit
bridge
full
voltage
output
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Chinese (zh)
Inventor
郑恩爱
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Fujian Eurasia Shengdi Industrial Co ltd
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Fujian Eurasia Shengdi Industrial Co ltd
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Priority to CN202311804048.3A priority Critical patent/CN117914174A/en
Publication of CN117914174A publication Critical patent/CN117914174A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/06—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using impedances

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

The invention relates to a resonant boost inverter circuit, a module and a method. The input end of the low-voltage full-bridge circuit is connected with the output end of the low-voltage direct-current power supply, the output end of the low-voltage full-bridge circuit is connected with the input end of the LC resonance circuit, and the output end of the LC resonance circuit is connected with the input end of the high-voltage full-bridge circuit; the control end of the full-bridge driving circuit is connected with the controlled end of the low-voltage full-bridge circuit so as to drive the working frequency of the full-bridge driving circuit to be the same as the LC oscillation frequency of the LC resonance circuit; the control end of the SPWM drive circuit is connected with the controlled end of the high-voltage full-bridge circuit to control the frequency and amplitude of the output voltage of the high-voltage full-bridge circuit. The resonant boosting is realized through the resonant circuit and the full-wave rectification, a transformer is not needed, the element loss is small, the conversion efficiency is high, the heating is reduced, the size of the inverter is reduced, and a wider input voltage range can be used. The parallel circuit can also work a plurality of similar circuits in parallel, and the expansion of output power is realized rapidly and conveniently.

Description

Resonant boost inverter circuit, module and method
Technical Field
The present invention relates to the field of power supply circuits, and in particular, to a resonant boost inverter circuit, a module and a method.
Background
The household appliances in China are mainly powered by 220V alternating current mains supply, the output of the energy storage battery is direct current, and along with the development of electrochemical energy storage and photovoltaic power generation, an inverter for converting the direct current into alternating current has become an important component of an energy storage system. The current development of inverter technology in the industry is continually improving with advances in power electronics, microelectronics and modern control theory. In portable small-sized energy storage systems and uninterruptible power supplies, low-voltage battery packs are still adopted in the industry at present, and the nominal voltage range of the battery packs is generally between 10 and 60V. Currently, there are two inversion techniques commonly used in the industry for low voltage battery packs: one is to boost the battery voltage through a transformer in a switching power supply mode and become 220V alternating current output of 50Hz, and the other is to boost the battery voltage through the transformer in the switching power supply mode and rectify and filter the battery voltage into 400V high voltage of direct current, and then modulate the 400V high voltage into 220V alternating current output of 50Hz through a high-frequency SPWM (sinusoidal pulse width modulation) circuit.
However, the existing inverter scheme of the low-voltage battery pack in the market has the defects that the conversion efficiency of the power supply is low due to the adoption of the voltage boosting and inversion of the transformer, the power supply can only achieve 85% -94% generally, the heat productivity is large, the inverter is easy to high temperature, larger cooling fins are needed, and even a special fan is needed to help heat dissipation. Meanwhile, the transformer, the fan and the radiating fins occupy space, so that the inverter cannot be miniaturized and light, the service life of the electrolytic capacitor is shortened due to high temperature caused by lower efficiency, the service life of the inverter is seriously influenced, and the inverter becomes a big pain point for influencing the upgrading of the inverter product.
Disclosure of Invention
Accordingly, it is necessary to provide a resonant boost inverter circuit, a module and a method for solving the problems of low efficiency and large size of the conventional boost inverter.
In a first aspect, the present embodiment proposes a resonant boost inverter circuit, including: a low-voltage full-bridge circuit, a full-bridge driving circuit, an LC resonance circuit, a high-voltage full-bridge circuit and an SPWM driving circuit; the input end of the low-voltage full-bridge circuit is connected with the output end of the low-voltage direct-current power supply, the output end of the low-voltage full-bridge circuit is connected with the input end of the LC resonance circuit, and the output end of the LC resonance circuit is connected with the input end of the high-voltage full-bridge circuit;
The control end of the full-bridge driving circuit is connected with the controlled end of the low-voltage full-bridge circuit so as to drive the working frequency of the full-bridge driving circuit to be the same as the LC oscillation frequency of the LC resonance circuit;
The control end of the SPWM drive circuit is connected with the controlled end of the high-voltage full-bridge circuit to control the frequency and amplitude of the output voltage of the high-voltage full-bridge circuit.
Further, the LC resonance circuit comprises a first capacitor, a second capacitor, a first inductor and a full-wave rectifier bridge;
The first end of the first inductor is connected with a bridge arm of the low-voltage full-bridge circuit; the second end of the first inductor is connected with the first end of the first capacitor and the first input end of the full-wave rectifier bridge; the other bridge arm of the low-voltage full-bridge circuit is connected with the second end of the first capacitor and the second input end of the full-wave rectifier bridge; the positive output end of the full-wave rectifier bridge is connected with the first end of the second capacitor and the first input end of the high-voltage full-bridge circuit; and the negative output end of the full-wave rectifier bridge is connected with the second end of the second capacitor and the second input end of the high-voltage full-bridge circuit.
Further, the resonant boost inverter circuit further comprises a diode, wherein the positive electrode of the diode is connected with the output end of the low-voltage direct-current power supply, and the negative electrode of the diode is connected with the input end of the low-voltage full-bridge circuit.
Further, an LC filter circuit is further arranged at the output end of the high-voltage full-bridge circuit, and the LC filter circuit modulates the output voltage of the high-voltage full-bridge circuit into sine waves.
Further, the LC filter circuit comprises a third capacitor and a second inductor; a bridge arm of the high-voltage full-bridge circuit is connected with the first end of the second inductor, and the second end of the second inductor is connected with the first end of the third capacitor; the other bridge arm of the high-voltage full-bridge circuit is connected with the second end of the third capacitor; and two ends of the third capacitor are respectively connected with two output ends of the resonant boost inverter circuit.
Further, the full-bridge driving circuit comprises a PWM control chip and two half-bridge driving chips, and the PWM control chip drives the switching tube of the low-voltage full-bridge circuit to be switched on and off through the two half-bridge driving chips.
Further, the SPWM driving circuit comprises an SPWM control chip and two half-bridge driving chips, and the SPWM control chip drives the switching tube of the high-voltage full-bridge circuit to be switched on and off through the two half-bridge driving chips.
In a second aspect, the present invention further provides a resonant boost inverter module, including at least two resonant boost inverter circuits as described above; the output ends of all the resonant boost inverter circuits are connected in parallel, and all the high-voltage full-bridge circuits share the same SPWM driving circuit for control.
In a third aspect, the present invention further provides a resonant boost inversion method, using the resonant boost inversion circuit as described above, comprising the steps of:
controlling the working frequency of the full-bridge driving circuit to be the same as the LC oscillating frequency of the LC resonant circuit, and converting the voltage into direct-current high voltage through the LC resonant circuit;
The on-off of a switching device of the high-voltage full-bridge circuit is controlled, and direct current is converted into alternating current;
The voltage is modulated by an LC filter circuit into a smoothed sine wave voltage output.
According to the inverter circuit provided by the invention, resonance boosting is realized through the resonance circuit and full-wave rectification, a transformer with larger size is not needed, the conversion efficiency can be higher due to smaller element loss of resonance boosting, heating is reduced, and even a radiating fin and a fan can be omitted, so that the size of the inverter is reduced, and the size space is greatly saved. The inverter circuit can use a wider input voltage range, and experiments prove that the voltage input of 12V-60V can be boosted to 350V-400V. The SPWM driving circuit is used for driving the high-voltage full-bridge circuit to realize alternating current output; in addition, a plurality of similar circuits can be connected in parallel to work, and the expansion of output power is realized rapidly and conveniently.
Drawings
FIG. 1 is a circuit diagram of an embodiment of a resonant boost inverter circuit of the present invention;
FIG. 2 is a circuit diagram of an embodiment of a resonant boost inverter module according to the present invention;
fig. 3 is a circuit diagram of an embodiment of a resonant boost portion of a resonant boost inverter circuit according to the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
Detailed Description
In order that the above objects, features and advantages of the invention will be readily apparent, a more particular description of the invention briefly described above will be rendered by reference to the appended drawings. It is apparent that the specific details described below are only some of the embodiments of the present invention and that the present invention may be practiced in many other embodiments that depart from those described herein. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, as can be seen with particular reference to fig. 1-3.
In one embodiment, referring to fig. 1, a resonant boost inverter circuit includes a low-voltage full-bridge circuit, a full-bridge driving circuit, an LC resonant circuit, a high-voltage full-bridge circuit, and an SPWM driving circuit; the input end of the low-voltage full-bridge circuit is connected with the output end of the low-voltage direct-current power supply, the output end of the low-voltage full-bridge circuit is connected with the input end of the LC resonance circuit, and the output end of the LC resonance circuit is connected with the input end of the high-voltage full-bridge circuit;
The control end of the full-bridge driving circuit is connected with the controlled end of the low-voltage full-bridge circuit so as to drive the working frequency of the full-bridge driving circuit to be the same as the LC oscillation frequency of the LC resonance circuit; at this time, the LC resonant circuit is operated in a resonant state. Due to resonance effect, the output of the battery pack is overlapped with resonance voltage in each period, so that the capacitance voltage is gradually increased.
The control end of the SPWM drive circuit is connected with the controlled end of the high-voltage full-bridge circuit to control the frequency and amplitude of the output voltage of the high-voltage full-bridge circuit. The output pulse width is changed according to a sine rule through driving control, namely the SPWM waveform controls the on-off of 4 switching devices in the high-voltage full-bridge circuit, so that the area of the output pulse voltage is equal to the area of the sine wave which is expected to be output in a corresponding section, and the frequency and the amplitude of the output voltage of the inverter circuit can be adjusted through changing the frequency and the amplitude of the modulating wave.
The inverter circuit provided by the invention realizes resonance boosting through the resonance circuit and full-wave rectification, does not need to use a transformer with larger volume, has higher conversion efficiency due to smaller element loss of resonance boosting, reduces heating, and even can omit a radiating fin and a fan, thereby reducing the volume of the inverter and greatly saving the size space. The inverter circuit can use a wider input voltage range, and experiments prove that the voltage input of 12V-60V can be boosted to 350V-400V. The SPWM driving circuit is used for driving the high-voltage full-bridge circuit to realize alternating current output; the parallel circuit can also work a plurality of similar circuits in parallel, and the expansion of output power is realized rapidly and conveniently.
On the basis of the embodiment, specifically, the LC resonant circuit includes a first capacitor, a second capacitor, a first inductor and a full-wave rectifier bridge; the first end of the first inductor is connected with a bridge arm of the low-voltage full-bridge circuit; the second end of the first inductor is connected with the first end of the first capacitor and the first input end of the full-wave rectifier bridge; the other bridge arm of the low-voltage full-bridge circuit is connected with the second end of the first capacitor and the second input end of the full-wave rectifier bridge; the positive output end of the full-wave rectifier bridge is connected with the first end of the second capacitor and the first input end of the high-voltage full-bridge circuit; the negative output end of the full-wave rectifier bridge is connected with the second end of the second capacitor and the second input end of the high-voltage full-bridge circuit.
On the basis of the embodiment, the resonant boost inverter circuit further comprises a diode, wherein the positive electrode of the diode is connected with the output end of the low-voltage direct-current power supply, and the negative electrode of the diode is connected with the input end of the low-voltage full-bridge circuit.
On the basis of the embodiment, further, an LC filter circuit is further arranged at the output end of the high-voltage full-bridge circuit, and the LC filter circuit modulates the output voltage of the high-voltage full-bridge circuit into sine waves. The LC filter circuit comprises a third capacitor and a second inductor; a bridge arm of the high-voltage full-bridge circuit is connected with the first end of the second inductor, and the second end of the second inductor is connected with the first end of the third capacitor; the other bridge arm of the high-voltage full-bridge circuit is connected with the second end of the third capacitor; two ends of the third capacitor are respectively connected with two output ends of the resonant boost inverter circuit.
In the embodiment of the invention, the full-bridge driving circuit comprises a PWM control chip and two half-bridge driving chips, and the PWM control chip drives the switching tube of the low-voltage full-bridge circuit to be switched on and off through the two half-bridge driving chips. The SPWM driving circuit comprises an SPWM control chip and two half-bridge driving chips, and the SPWM control chip drives the switching tube of the high-voltage full-bridge circuit to be switched on and off through the two half-bridge driving chips.
The circuit converts the low-voltage direct current output into alternating current output required by electric equipment by the following steps:
Resonant boost is a direct current high voltage process: the first inductance and the first capacitance are taken to be appropriate values, for example: the first inductor is 470uH, the first capacitor is 2.2uF, the LC oscillating frequency is calculated to be 4.95kHz, and the working frequency of the full-bridge driving circuit is set to be 4.95kHz, so that the first inductor and the first capacitor work in a resonance state. Because of resonance effect, the output of the battery pack in each period is overlapped with resonance voltage, so that the voltage of the first capacitor is gradually increased, the second capacitor is charged whenever the voltage of the first capacitor is larger than that of the second capacitor, the voltage at two ends of the second capacitor is increased more and more, and when the voltage of the second capacitor reaches 350-400V, the pulse width of PWM is controlled through feedback, so that the second voltage is stabilized between 350-400V.
The output process of modulating the direct-current high voltage into 220V alternating-current sine waves comprises the following steps: the SPWM control chip and the two half-bridge driving chips form an SPWM driving circuit; the SPWM chip outputs SPWM signals to the two half-bridge driving chips, the two half-bridge driving chips drive the high-voltage full-bridge circuit, so that the output pulse width changes according to a sine rule and PWM waveforms equivalent to sine waves, namely, the SPWM waveforms control the on-off of 4 switching devices in the high-voltage full-bridge circuit in the inverter circuit, the area of the output pulse voltage is equal to the area of the sine waves expected to be output in a corresponding interval, the frequency and the amplitude of the output voltage of the inverter circuit can be adjusted by changing the frequency and the amplitude of the modulation waves, and the output voltage is changed into smooth sine wave voltage output after passing through an LC filter circuit formed by the second inductor and the third capacitor.
Referring to fig. 2, the invention further provides a resonant boost inversion module, which comprises at least two resonant boost inversion circuits; the output ends of all the resonant boost inverter circuits are connected in parallel, and all the high-voltage full-bridge circuits share the same SPWM driving circuit for control.
And a process of expanding output power by combining a plurality of inverter circuit modules: two or more inverter circuit modules can share the same SPWM driving circuit, the high voltage ends are connected in parallel, the 4 output ends of the SPWM driving circuit are connected in parallel, and meanwhile, the output ends are also connected in parallel, so that parallel operation can be realized, output power is enlarged, and the effect similar to that of a string inverter is achieved.
The scheme is that resonance boosting is generated by controlling the working frequency of a low-voltage full-bridge circuit to be the same as LC resonance frequency, then direct-current voltage is boosted from low voltage to high voltage through full-wave rectification, and then the high voltage passes through an SPWM driving circuit high-voltage full-bridge circuit and is filtered by LC to become alternating-current pure sine wave output; the scheme can enlarge output power by sharing one SPWM drive circuit by a plurality of circuits and carrying out local node parallel connection and output end parallel connection.
The invention also provides a resonant boosting inversion method, which uses the resonant boosting inversion circuit, and comprises the following steps:
controlling the working frequency of the full-bridge driving circuit to be the same as the LC oscillating frequency of the LC resonant circuit, and converting the voltage into direct-current high voltage through the LC resonant circuit;
The switching device of the high-voltage full-bridge circuit is controlled to be switched on and off, and direct current is converted into alternating current;
The voltage is modulated by an LC filter circuit into a smoothed sine wave voltage output.
When the method is used, the output ends of the plurality of groups of resonant boost inverter circuits can be connected in parallel so as to enlarge the output power; wherein, the high-voltage full-bridge circuits of all the resonance boosting inverter circuits share the same SPWM driving circuit for control.
According to the technical scheme, with reference to the attached 1, the circuit consists of 1 full-bridge driving circuit, 1 low-voltage full-bridge circuit, 1 high-voltage full-bridge circuit, 1 SPWM driving circuit, 1 full-wave rectifier bridge, 2 inductors and 2 capacitors. V1-V4 in the drawing form a low-voltage full-bridge circuit, and V5-V8 form a high-voltage full-bridge circuit; the full-bridge driving circuit, the low-voltage full-bridge circuit, L1 and C1 jointly form a resonance boosting circuit; the D2 full-wave rectifier bridge and the C2 form a rectifier filter circuit, and alternating current is rectified and filtered into high-voltage direct current; the SPWM driving circuit, the high-voltage full-bridge circuit, the L2 and the C3 form a control circuit of the SPWM to control and output pure sine wave alternating current. The advantages of small volume, low heating, high input voltage range, convenient expansion and the like are realized.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that modifications, substitutions and improvements can be made by those skilled in the art without departing from the spirit of the invention, and are intended to be within the scope of the invention. Accordingly, the protection scope of the present invention is subject to the claims.

Claims (10)

1. A resonant boost inverter circuit, comprising: a low-voltage full-bridge circuit, a full-bridge driving circuit, an LC resonance circuit, a high-voltage full-bridge circuit and an SPWM driving circuit; the input end of the low-voltage full-bridge circuit is connected with the output end of the low-voltage direct-current power supply, the output end of the low-voltage full-bridge circuit is connected with the input end of the LC resonance circuit, and the output end of the LC resonance circuit is connected with the input end of the high-voltage full-bridge circuit;
The control end of the full-bridge driving circuit is connected with the controlled end of the low-voltage full-bridge circuit so as to drive the working frequency of the full-bridge driving circuit to be the same as the LC oscillation frequency of the LC resonance circuit;
The control end of the SPWM drive circuit is connected with the controlled end of the high-voltage full-bridge circuit to control the frequency and amplitude of the output voltage of the high-voltage full-bridge circuit.
2. The resonant boost inverter circuit of claim 1, wherein the LC resonant circuit comprises a first capacitor, a second capacitor, a first inductor, and a full wave rectifier bridge;
The first end of the first inductor is connected with a bridge arm of the low-voltage full-bridge circuit; the second end of the first inductor is connected with the first end of the first capacitor and the first input end of the full-wave rectifier bridge; the other bridge arm of the low-voltage full-bridge circuit is connected with the second end of the first capacitor and the second input end of the full-wave rectifier bridge; the positive output end of the full-wave rectifier bridge is connected with the first end of the second capacitor and the first input end of the high-voltage full-bridge circuit; and the negative output end of the full-wave rectifier bridge is connected with the second end of the second capacitor and the second input end of the high-voltage full-bridge circuit.
3. The resonant boost inverter circuit of claim 1, further comprising a diode, wherein an anode of the diode is connected to an output of a low voltage dc power supply, and a cathode of the diode is connected to an input of the low voltage full bridge circuit.
4. The resonant boost inverter circuit of claim 1, wherein the output of the high voltage full-bridge circuit is further provided with an LC filter circuit, the LC filter circuit modulating the output voltage of the high voltage full-bridge circuit to a sine wave.
5. The resonant boost inverter circuit of claim 4, wherein the LC filter circuit comprises a third capacitor and a second inductor; a bridge arm of the high-voltage full-bridge circuit is connected with the first end of the second inductor, and the second end of the second inductor is connected with the first end of the third capacitor; the other bridge arm of the high-voltage full-bridge circuit is connected with the second end of the third capacitor; and two ends of the third capacitor are respectively connected with two output ends of the resonant boost inverter circuit.
6. The resonant boost inverter circuit of claim 1, wherein the full-bridge drive circuit comprises a PWM control chip and two half-bridge drive chips, and the PWM control chip drives the switching tube of the low-voltage full-bridge circuit to be turned on and off through the two half-bridge drive chips.
7. The resonant boost inverter circuit of claim 1, wherein the SPWM driving circuit comprises an SPWM control chip and two half-bridge driving chips, and the SPWM control chip drives the switching tube of the high-voltage full-bridge circuit to be turned on and off through the two half-bridge driving chips.
8. A resonant boost inverter module comprising at least two resonant boost inverter circuits according to any one of claims 1 to 7; the output ends of all the resonant boost inverter circuits are connected in parallel, and all the high-voltage full-bridge circuits share the same SPWM driving circuit for control.
9. A resonant boost inversion method, characterized by using the resonant boost inversion circuit according to any one of claims 1 to 7, comprising the steps of:
controlling the working frequency of the full-bridge driving circuit to be the same as the LC oscillating frequency of the LC resonant circuit, and converting the voltage into direct-current high voltage through the LC resonant circuit;
The on-off of a switching device of the high-voltage full-bridge circuit is controlled, and direct current is converted into alternating current;
The voltage is modulated by the LC filter circuit into a smoothed sine wave voltage output.
10. The resonance boosting inversion method according to claim 9, wherein the output terminals of the plurality of sets of resonance boosting inversion circuits are connected in parallel to enlarge the output power; wherein, the high-voltage full-bridge circuits of all the resonance boosting inverter circuits share the same SPWM driving circuit for control.
CN202311804048.3A 2023-12-26 2023-12-26 Resonant boost inverter circuit, module and method Pending CN117914174A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311804048.3A CN117914174A (en) 2023-12-26 2023-12-26 Resonant boost inverter circuit, module and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311804048.3A CN117914174A (en) 2023-12-26 2023-12-26 Resonant boost inverter circuit, module and method

Publications (1)

Publication Number Publication Date
CN117914174A true CN117914174A (en) 2024-04-19

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Application Number Title Priority Date Filing Date
CN202311804048.3A Pending CN117914174A (en) 2023-12-26 2023-12-26 Resonant boost inverter circuit, module and method

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