Inverter and its boost control method and control device and front stage circuits and electric appliance
阅读说明：本技术 逆变器及其升压控制方法和控制装置以及前级电路和电器 (Inverter and its boost control method and control device and front stage circuits and electric appliance ) 是由 李修贤 于洪涛 寇苗苗 张煜文 杨帆 刘文斌 于 2019-10-08 设计创作，主要内容包括：本公开提出一种逆变器及其升压控制方法和控制装置以及前级电路和电器,涉及电子电路领域。本公开通过一种设定结构的前级电路,使得单级结构的逆变器就能够实现都对电压的调节。此外,通过合理地设置逆变桥直通占比信息,使得逆变器可以实现任意倍数的升压。此外,通过前级电路结构及其储能元件的设置,使得逆变器的上下桥臂可以直通,无需插入死区时间,改善输出波形,提高输出电压质量。(The disclosure proposes a kind of inverter and its boost control method and control device and front stage circuits and electric appliance, is related to electronic circuit field.The disclosure is by the front stage circuits of setting structure a kind of, so that the inverter of single step arrangement can be realized as the adjusting all to voltage.In addition, accounting information is led directly to by reasonably setting inverter bridge, so that the boosting of any multiple may be implemented in inverter.In addition, leading directly to the upper and lower bridge arm of inverter by the setting of front stage circuits structure and its energy-storage travelling wave tube, without being inserted into dead time, improves output waveform, improve output voltage quality.)
1. a kind of inverter characterized by comprising front stage circuits and inverter bridge；
The front stage circuits include: switching tube, the first inductance, the second inductance, storage capacitor, first diode, the second diode, Third diode, the 4th diode and the 5th diode；
Wherein, the first end of anode the first inductance of connection of first diode, the cathode of first diode connect the second inductance First end, the second end of anode the first inductance of connection of the second diode, the cathode of the second diode connect the of the second inductance Two ends, the anode of anode the second diode of connection of third diode, the cathode connection first diode of third diode are born Pole, the cathode of anode the second diode of connection of switching tube and the anode of the 4th diode, the cathode connection the five or two of switching tube The anode of pole pipe, the both ends of storage capacitor are separately connected the cathode of the 4th diode and the cathode of switching tube, first diode The anode of anode connection direct-current input power supplying, the anode of the cathode connection direct-current input power supplying of the 5th diode, the 4th diode Cathode and the cathode of direct-current input power supplying be separately connected the both ends of inverter bridge.
2. inverter according to claim 1, which is characterized in that
When inverter bridge work is in pass-through state, inverter bridge is short-circuit, switching tube, first diode and the second diode current flow, the Three diodes, the 4th diode and the cut-off of the 5th diode, the first inductance and the second inductance in parallel and storage energy, storage capacitor It releases energy with direct-current input power supplying to the first inductance and the second inductance.
3. inverter according to claim 1, which is characterized in that
When inverter bridge work is in non-pass-through state, inverter bridge is equivalent to voltage source, switching tube, first diode and the two or two pole Pipe cut-off, third diode, the 4th diode and the 5th diode current flow, the first inductance and the series connection of the second inductance, the first inductance, Second inductance and direct-current input power supplying release energy to storage capacitor and inverter bridge, storage capacitor storage energy.
4. inverter according to claim 1, which is characterized in that the both ends of inverter bridge are separately connected the anode of DC bus And cathode.
5. inverter according to claim 1-4, which is characterized in that
The switching tube is active device；
Alternatively, the inverter bridge is three phase inverter bridge.
6. inverter according to claim 1-4, which is characterized in that
Sensitizing factor of the output voltage at inverter bridge both ends relative to DC input voitage are as follows:
Wherein, B indicates the output voltage V at inverter bridge both endsPNRelative to DC input voitage VinSensitizing factor, D indicate one Inverter bridge is in the accounting information of the time of pass-through state in a switch periods, and D is configured as greater than 0 and less than 1/3, so that B is greater than 1.
7. a kind of front stage circuits characterized by comprising
Switching tube, the first inductance, the second inductance, storage capacitor, first diode, the second diode, third diode, the four or two Pole pipe and the 5th diode；
Wherein, the first end of anode the first inductance of connection of first diode, the cathode of first diode connect the second inductance First end, the second end of anode the first inductance of connection of the second diode, the cathode of the second diode connect the of the second inductance Two ends, the anode of anode the second diode of connection of third diode, the cathode connection first diode of third diode are born Pole, the cathode of anode the second diode of connection of switching tube and the anode of the 4th diode, the cathode connection the five or two of switching tube The anode of pole pipe, the both ends of storage capacitor are separately connected the cathode of the 4th diode and the cathode of switching tube, first diode The anode of anode connection direct-current input power supplying, the anode of the cathode connection direct-current input power supplying of the 5th diode.
8. front stage circuits according to claim 7, which is characterized in that
In the first operative state, switching tube, first diode and the second diode current flow, third diode, the 4th diode End with the 5th diode, the first inductance and the second inductance in parallel and storage energy, storage capacitor and direct-current input power supplying are to the One inductance and the second inductance release energy；
Alternatively, in a second operative state, switching tube, first diode and the cut-off of the second diode, third diode, the four or two Pole pipe and the 5th diode current flow, the first inductance and the second inductance series connection, the first inductance, the second inductance and direct-current input power supplying to Storage capacitor releases energy, storage capacitor storage energy.
9. a kind of boost control method based on any one of the claim 1-6 inverter characterized by comprising
Inverter bridge into inverter and switching tube send first control signal and conductivity control signal respectively simultaneously, and described first Signal control inverter bridge work is controlled in pass-through state, the conductivity control signal control switch pipe conducting, so that the one or two Pole pipe and the second diode current flow, third diode, the 4th diode and the cut-off of the 5th diode, the first inductance and the second inductance In parallel and storage energy, storage capacitor and direct-current input power supplying release energy to the first inductance and the second inductance；
Alternatively, sending second control signal and cut-off control signal, second control respectively to inverter bridge and switching tube simultaneously Signal controls inverter bridge work in non-pass-through state, the cut-off control Signal-controlled switch pipe cut-off, so that the one or two pole Pipe and the cut-off of the second diode, third diode, the 4th diode and the 5th diode current flow, the first inductance and the second inductance string Connection, the first inductance, the second inductance and direct-current input power supplying release energy to storage capacitor and inverter bridge, and storage capacitor stores energy Amount.
10. according to the method described in claim 9, it is characterized in that,
According in a switch periods inverter bridge be in pass-through state time accounting information, determine first control signal and The transmission opportunity of second control signal；
Wherein, the accounting information is configured as greater than 0 and less than 1/3, so that the output voltage V at inverter bridge both endsPNRelatively In DC input voitage VinSensitizing factor be greater than 1.
11. a kind of electric appliance characterized by comprising inverter described in any one of claims 1-6, alternatively, claim 7- 8 described in any item front stage circuits.
12. a kind of boosting controller based on inverter, comprising:
Memory；And
It is coupled to the processor of the memory, the processor is configured to the instruction based on storage in the memory, Boost control method described in perform claim requirement 9 or 10.
13. a kind of non-transient computer readable storage medium, is stored thereon with computer program, which is executed by processor Boost control method described in Shi Shixian claim 9 or 10.
Technical field
This disclosure relates to electronic circuit field, in particular to a kind of inverter and its boost control method and control device with And front stage circuits and electric appliance.
Background technique
Inverter is the equipment for direct current being transformed into alternating current.One of voltage source inverter is inputting if applying Voltage range changes biggish occasion, needs to increase DC/DC (DC to DC) converter in prime, multilevel structure leads to system Efficiency of transmission reduce, increased costs.
In addition, voltage source inverter does not allow upper and lower bridge arm to simultaneously turn on, short circuit otherwise can occur, damage inverter, because This needs that dead time (i.e. upper and lower bridge arm simultaneously turns off) is added in upper and lower bridge arm switching signal, but the addition meeting of dead time Cause the distortion of output waveform.
Summary of the invention
In order to solve the problems, such as existing for voltage source inverter it is above-mentioned at least one, the disclosure pass through a kind of setting structure before Grade circuit, so that the inverter of single step arrangement can be realized as the adjusting all to voltage.In addition, by the way that inverter bridge is reasonably arranged Straight-through accounting information, so that the boosting of any multiple may be implemented in inverter.In addition, passing through front stage circuits structure and its energy storage member The setting of part leads directly to the upper and lower bridge arm of inverter, without being inserted into dead time, improves output waveform, improves output Quality of voltage.
According to one aspect of the disclosure, a kind of inverter is proposed, comprising: front stage circuits and inverter bridge；
The front stage circuits include: switching tube, the first inductance, the second inductance, storage capacitor, first diode, the two or two Pole pipe, third diode, the 4th diode and the 5th diode；
Wherein, the first end of anode the first inductance of connection of first diode, the second electricity of cathode connection of first diode The first end of sense, the second end of anode the first inductance of connection of the second diode, the cathode of the second diode connect the second inductance Second end, the anode of anode the second diode of connection of third diode, the cathode of third diode connects first diode Cathode, the cathode of anode the second diode of connection of switching tube and the anode of the 4th diode, the cathode connection the of switching tube The anode of five diodes, the both ends of storage capacitor are separately connected the cathode of the 4th diode and the cathode of switching tube, the one or two pole The anode of the anode connection direct-current input power supplying of pipe, the anode of the cathode connection direct-current input power supplying of the 5th diode, the four or two The cathode of pole pipe and the cathode of direct-current input power supplying are separately connected the both ends of inverter bridge.
In some embodiments, when inverter bridge work is in pass-through state, inverter bridge is short-circuit, switching tube, first diode With the second diode current flow, third diode, the 4th diode and the cut-off of the 5th diode, the first inductance and the second inductance in parallel And storage energy, storage capacitor and direct-current input power supplying release energy to the first inductance and the second inductance.
In some embodiments, when inverter bridge work is in non-pass-through state, inverter bridge is equivalent to voltage source, switching tube, First diode and the cut-off of the second diode, third diode, the 4th diode and the 5th diode current flow, the first inductance and the The series connection of two inductance, the first inductance, the second inductance and direct-current input power supplying release energy to storage capacitor and inverter bridge, storage capacitor Storage energy.
In some embodiments, the both ends of inverter bridge are separately connected the anode and cathode of DC bus.
In some embodiments, the switching tube is active device.
In some embodiments, the inverter bridge is three phase inverter bridge.
In some embodiments, sensitizing factor of the output voltage at inverter bridge both ends relative to DC input voitage are as follows:
Wherein, B indicates the output voltage V at inverter bridge both endsPNRelative to DC input voitage VinSensitizing factor, D indicate Inverter bridge is in the accounting information of the time of pass-through state in a switch periods, and D is configured as being greater than 0 and less than 1/3, with So that B is greater than 1.
According to one aspect of the disclosure, a kind of front stage circuits are proposed, comprising:
Switching tube, the first inductance, the second inductance, storage capacitor, first diode, the second diode, third diode, Four diodes and the 5th diode；
Wherein, the first end of anode the first inductance of connection of first diode, the second electricity of cathode connection of first diode The first end of sense, the second end of anode the first inductance of connection of the second diode, the cathode of the second diode connect the second inductance Second end, the anode of anode the second diode of connection of third diode, the cathode of third diode connects first diode Cathode, the cathode of anode the second diode of connection of switching tube and the anode of the 4th diode, the cathode connection the of switching tube The anode of five diodes, the both ends of storage capacitor are separately connected the cathode of the 4th diode and the cathode of switching tube, the one or two pole The anode of the anode connection direct-current input power supplying of pipe, the anode of the cathode connection direct-current input power supplying of the 5th diode.
In some embodiments, in the first operative state, switching tube, first diode and the second diode current flow, the Three diodes, the 4th diode and the cut-off of the 5th diode, the first inductance and the second inductance in parallel and storage energy, storage capacitor It releases energy with direct-current input power supplying to the first inductance and the second inductance.
In some embodiments, in a second operative state, switching tube, first diode and the cut-off of the second diode, the Three diodes, the 4th diode and the 5th diode current flow, the first inductance and the series connection of the second inductance, the first inductance, the second inductance It releases energy with direct-current input power supplying to storage capacitor and inverter bridge, storage capacitor storage energy.
According to one aspect of the disclosure, a kind of boost control method based on inverter is proposed, comprising:
The inverter bridge into inverter and switching tube send first control signal and conductivity control signal respectively simultaneously, described First control signal controls inverter bridge work in pass-through state, and the conductivity control signal control switch pipe is connected, so that the One diode and the second diode current flow, third diode, the 4th diode and the cut-off of the 5th diode, the first inductance and second Simultaneously storage energy, storage capacitor and direct-current input power supplying release energy inductance in parallel to the first inductance and the second inductance；
Alternatively, send second control signal respectively to inverter bridge and switching tube simultaneously and end control signal, described second Signal control inverter bridge work is controlled in non-pass-through state, the cut-off control Signal-controlled switch pipe cut-off, so that first Diode and the cut-off of the second diode, third diode, the 4th diode and the 5th diode current flow, the first inductance and the second electricity Sense series connection, the first inductance, the second inductance and direct-current input power supplying release energy to storage capacitor and inverter bridge, storage capacitor storage Energy.
In some embodiments, believed according to the accounting for the time that inverter bridge is in pass-through state in a switch periods Breath, determines the transmission opportunity of first control signal and second control signal；Wherein, the accounting information be configured as be greater than 0 and Less than 1/3, so that the output voltage V at inverter bridge both endsPNRelative to DC input voitage VinSensitizing factor be greater than 1.
According to one aspect of the disclosure, a kind of electric appliance is proposed, comprising: the inverter of any one aforementioned embodiment, alternatively, The front stage circuits of any one aforementioned embodiment.
According to one aspect of the disclosure, a kind of boosting controller based on inverter is proposed, comprising:
Memory；And
It is coupled to the processor of the memory, the processor is configured to the finger based on storage in the memory It enables, executes the boost control method of any one aforementioned embodiment.
According to one aspect of the disclosure, it proposes a kind of computer readable storage medium, is stored thereon with computer program, The program realizes the boost control method of any one aforementioned embodiment when being executed by processor.
Detailed description of the invention
Attached drawing needed in embodiment or description of Related Art will be briefly described below.According to following ginseng According to the detailed description of attached drawing, the disclosure can be more clearly understood,
It should be evident that the accompanying drawings in the following description is only some embodiments of the present disclosure, skill common for this field For art personnel, without any creative labor, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram for the booster system realized in some embodiments of the disclosure based on inverter.
Fig. 2 is the schematic diagram for the booster system realized in other embodiments of the disclosure based on inverter.
Fig. 3 is that inverter works in the schematic illustration of pass-through state in some embodiments of the disclosure.
Fig. 4 is that inverter works in the schematic illustration of non-pass-through state in some embodiments of the disclosure.
Fig. 5 is the flow diagram of the boost control method based on inverter in some embodiments of the disclosure.
Fig. 6 is the schematic diagram of the boosting controller based on inverter in some embodiments of the disclosure.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present disclosure, the technical solution in the embodiment of the present disclosure is carried out clear, complete Site preparation description.
Fig. 1 is the schematic diagram for the booster system realized in some embodiments of the disclosure based on inverter.
Fig. 2 is the schematic diagram for the booster system realized in other embodiments of the disclosure based on inverter.
As depicted in figs. 1 and 2, the booster system of the embodiment includes: front stage circuits 11 and inverter bridge 12, in addition, may be used also To include direct-current input power supplying 13 and load (such as motor load) 14.Wherein, front stage circuits 11 and inverter bridge 12 form inversion Device.
As depicted in figs. 1 and 2, inverter bridge 12 can be for example made of upper and lower bridge arm, and one kind three is exemplarily illustrated in figure Phase inverter bridge, wherein S1、S3、S5It is upper bridge arm, S2、S4、S6It is lower bridge arm.
As shown in Fig. 2, front stage circuits 11 include: switching tube S0, the first inductance L1, the second inductance L2, storage capacitor C1, One diode D1, the second diode D2, third diode D3, the 4th diode DaWith the 5th diode Db。
First diode D1Anode connection the first inductance L1First end, first diode D1Cathode connection second electricity Feel L2First end, the second diode D2Anode connection the first inductance L1Second end, the second diode D2Cathode connection the Two inductance L2Second end, third diode D3Anode connection the second diode D2Anode, third diode D3Cathode connect Meet first diode D1Cathode, switching tube S0Anode connection the second diode D2Cathode and the 4th diode DaAnode, Switching tube S0Cathode connect the 5th diode DbAnode, storage capacitor C1Both ends be separately connected the 4th diode DaIt is negative Pole and switching tube S0Cathode, first diode D1Anode connection direct-current input power supplying 13 anode, the 5th diode DbIt is negative Pole connects the anode of direct-current input power supplying 13, the 4th diode DaCathode and direct-current input power supplying 13 cathode be separately connected it is inverse Become the both ends of bridge.
In some embodiments, switching tube S0For active device.Switching tube is, for example, NPN type triode, IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), metal-oxide half field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor,MOSFET)。
In some embodiments, as shown in figure 3, when inverter work is in pass-through state, namely when inverter bridge 12 works In pass-through state (that is, upper bridge arm and lower bridge arm are both turned on), since upper and lower bridge arm is both turned on, 12 short circuit of inverter bridge, this When front stage circuits be in the first working condition, switching tube S0, first diode D1With the second diode D2Conducting, third diode D3, the 4th diode DaWith the 5th diode DbCut-off, the first inductance L1With the second inductance L2Parallel connection, storage capacitor C1It is defeated with direct current Enter power supply 13 to the first inductance L1With the second inductance L2It releases energy, the first inductance L1With the second inductance L2Storage energy.
In some embodiments, as shown in figure 4, when inverter work is in non-pass-through state, namely work as 12 work of inverter bridge Make in non-pass-through state (that is, one in upper bridge arm and lower bridge arm is connected, another shutdown), inverter bridge 12 is equivalent to voltage Source, front stage circuits are in the second working condition, switching tube S at this time0, first diode D1With the second diode D2Cut-off, the three or two Pole pipe D3, the 4th diode DaWith the 5th diode DbConducting, the first inductance L1With the second inductance L2Series connection, the first inductance L1, Two inductance L2With direct-current input power supplying 13 to storage capacitor C1It releases energy with inverter bridge 12, storage capacitor C1Storage energy.
In figures 3-4, VinIndicate the voltage (abbreviation DC input voitage) of direct-current input power supplying 13, VPNIndicate inverter bridge The output voltage at both ends, if the both ends of inverter bridge are separately connected the anode and cathode of DC bus, VPNAlso indicate that direct current is female Line voltage, VC1And icIndicate storage capacitor C1Voltage and current, VL1And iL1Indicate the first inductance L1Voltage and current, VL2With iL2Indicate the second inductance L2Voltage and current.
It is located in a switch periods T, the time that inverter bridge is in pass-through state is T1, then leads directly to duty ratio D=T1/T.
According to voltage-second balance principle, and combine Fig. 3-4, it can be deduced that:
To obtain:The capacitance voltage is smaller, is conducive to the reliability for improving device.
According to Kirchhoff's second law (KVL), and combine Fig. 3-4, it can be deduced that:
VPN=VC1+Vin
It is obtained by above-mentioned formula:
Wherein, B indicates the output voltage V at inverter bridge both endsPNRelative to DC input voitage VinSensitizing factor, D indicate Inverter bridge is in the accounting information of the time of pass-through state in a switch periods.In boosting application, when D is configured as greatly In 0 and when less than 1/3, B is greater than 1, i.e., the boosting of any multiple theoretically may be implemented.For example, B=3 is real as D=1/4 Existing 3 times of boostings.
In some embodiments, a kind of electric appliance includes: the inverter of any one aforementioned embodiment, alternatively, it is aforementioned any one The front stage circuits for inverter of embodiment.The electric appliance is, for example, air-conditioning etc., but is not limited to examples cited.
Fig. 5 is the flow diagram of the boost control method based on inverter in some embodiments of the disclosure.Party's rule It can such as be executed by boosting controller.
As shown in figure 5, the boost control method of the embodiment, includes: in each switch periods
Step S51, while inverter bridge into inverter and switching tube send first control signal and conducting control respectively Signal, in pass-through state, the conductivity control signal control switch pipe is connected for the first control signal control inverter bridge work, So that first diode and the second diode current flow, third diode, the 4th diode and the cut-off of the 5th diode, the first electricity Sense and the second inductance in parallel and storage energy, storage capacitor and direct-current input power supplying discharge energy to the first inductance and the second inductance Amount.
Step S52, while second control signal and cut-off control signal are sent respectively to inverter bridge and switching tube, described the Two control signal control inverter bridge work end in non-pass-through state, the cut-off control Signal-controlled switch pipe, so that the One diode and the cut-off of the second diode, third diode, the 4th diode and the 5th diode current flow, the first inductance and second Inductance series connection, the first inductance, the second inductance and direct-current input power supplying release energy to storage capacitor and inverter bridge, and storage capacitor is deposited Energy storage capacity.
In some embodiments, believed according to the accounting for the time that inverter bridge is in pass-through state in a switch periods Breath, determines the transmission opportunity of first control signal and second control signal.For example, if the straight-through duty ratio D of inverter bridge is configured It is 1/4, then when a switch periods start, sends first control signal and conductivity control signal, in switch periods When 1/4, second control signal and cut-off control signal are sent.
In boosting application, the accounting information is configured as greater than 0 and less than 1/3, so that sensitizing factor is greater than 1, To realize the boosting of any multiple.
Fig. 6 is the schematic diagram of the boosting controller based on inverter in some embodiments of the disclosure.
As shown in fig. 6, the boosting controller of the embodiment includes:
Memory 61；And
It is coupled to the processor 62 of the memory, the processor 62 is configured as being based on being stored in the memory 61 In instruction, execute the boost control method of aforementioned any one embodiment.
Wherein, memory 61 is such as may include system storage, fixed non-volatile memory medium.System storage Such as be stored with operating system, application program, Boot loader (Boot Loader) and other programs etc..
The embodiment of the present disclosure is by the front stage circuits of setting structure a kind of, so that the inverter of single step arrangement can be realized as All to the adjusting of voltage.In addition, accounting information is led directly to by reasonably setting inverter bridge, so that inverter may be implemented any times Several boostings.In addition, allowing the upper and lower bridge arm of inverter straight by the setting of front stage circuits structure and its energy-storage travelling wave tube It is logical, without being inserted into dead time, improves output waveform, improve output voltage quality.
Those skilled in the art should be understood that embodiment of the disclosure can provide as method, system or computer journey Sequence product.Therefore, complete hardware embodiment, complete software embodiment or combining software and hardware aspects can be used in the disclosure The form of embodiment.Moreover, it wherein includes the calculating of computer usable program code that the disclosure, which can be used in one or more, The computer implemented on machine non-transient storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of program product.
The foregoing is merely the preferred embodiments of the disclosure, not to limit the disclosure, all spirit in the disclosure and Within principle, any modification, equivalent replacement, improvement and so on be should be included within the protection scope of the disclosure.
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