CN203326914U - Hysteresis current control double Buck-Boost inverter - Google Patents
Hysteresis current control double Buck-Boost inverter Download PDFInfo
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- CN203326914U CN203326914U CN2013203196217U CN201320319621U CN203326914U CN 203326914 U CN203326914 U CN 203326914U CN 2013203196217 U CN2013203196217 U CN 2013203196217U CN 201320319621 U CN201320319621 U CN 201320319621U CN 203326914 U CN203326914 U CN 203326914U
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Abstract
The utility model relates to a hysteresis current control double Buck-Boost inverter, which comprises two independent DC power supplies, a positive group Buck-Boost converter, a negative group Buck-Boost converter, a positive group output capacitor voltage detection circuit, a negative group Buck-Boost converter, a load current detection circuit and a control circuit with DSP or dsPIC30F as the control core, wherein the positive/negative group Buck-Boost converter respectively comprises a power switch tube, an inductor, a diode, an output capacitor and a freewheeling diode. The output capacitor voltage is adjusted by the voltage close-loop control, and the load current is allowed to change with the given waveform by the hysteresis current control. The hysteresis current control double Buck-Boost inverter using the double-input single-input form has advantages of simple structure, easy implement, fast dynamic response, high output accuracy, reliable performance, strong robustness, very high current limiting capability, wide input voltage range or the like.
Description
Technical field
The utility model relates to a kind of DC/AC inverter, especially relates to two Buck-Boost inverters that a kind of hysteresis current is controlled.
Background technology
Growing tension along with the global energy supply, the generation of electricity by new energy such as solar energy and wind power generation technology is subject to people and more and more pays close attention to, in various grid-connected power generation system, inverter is commonly used as core technology, but traditional inverter has the shortcoming of himself: conventional inverter can be summed up as employing Buck Buck conversion circuit structure mostly, and output voltage amplitude can not surpass input direct voltage; Conventional inverter in various degree exist input voltage range narrow, there is no overcurrent protection function, these drawbacks limit the application of conventional inverter in grid-connected power generation system.Such as in solar energy and wind generator system, export satisfactory voltage in order to make inverter, requirement input side direct voltage must be higher than the peak value of output voltage, this has proposed very high requirement to inverter prime DC/DC translation circuit, prime DC/DC translation circuit has increased the complexity of system simultaneously, and system works efficiency and reliability are affected; On the other hand, the output voltage of inverter prime DC/DC translation circuit has fluctuation in a big way, and this requires inverter, to the fluctuation of input direct voltage, stronger antijamming capability is arranged.
The utility model content
In order to solve above-mentioned the deficiencies in the prior art, the utility model provides a kind of hysteresis current to control two Buck-Boost inverters, inverter adopts the single output form of dual input, have simple in structure, symmetry is good, be easy to realize, dynamic response is fast, output accuracy is high, dependable performance, the advantages such as strong robustness, output capacitance voltage as required can raise, improve the follow-up control of inverter to large electric current, also can reduce output capacitance voltage, make and reduce the voltage stress that switching tube bears when following the tracks of little electric current, reduce switching frequency, extend switching tube useful life, and when two input voltages differ in a big way, circuit still can work, the waveform of outputting high quality.The utlity model has very strong current limit ability, wide input voltage range, can be widely used in solar energy, wind power-generating grid-connected inverter and inverter power supply technical applications.
The technical solution adopted in the utility model is: a kind of hysteresis current is controlled two Buck-Boost inverters, as shown in Figure 1, it is characterized in that: two independent direct current power supplies, just/counter group of Buck-Boost converter, just/counter group of output capacitance voltage detecting circuit, load current detection circuit and the control circuit that DSP or dsPIC30F be control core of take.Just organizing the positive half cycle current waveform that the Buck-Boost converter produces alternating current, anti-group Buck-Boost converter produces the negative half-cycle current waveform of alternating current, just/counter group of Buck-Boost converter half period of only working respectively, the half cycle current waveform of two groups of converters combines and produces sinusoidal full-wave electric current.
The described Buck-Boost converter of just organizing comprises power switch pipe Q3/Q4, inductance L 2, diode D3, output capacitance C2 and sustained diode 4, power switch pipe Q3 drain electrode (or collector electrode) is connected with diode D4 negative electrode with DC power supply E2 is anodal, and its source electrode (or emitter) is connected with diode D3 negative electrode with inductance L 2 one ends; Inductance L 2 other ends are connected with DC power supply E2 negative pole, capacitor C 2 and power switch pipe Q4 drain electrode (or collector electrode); Diode D3 anode is connected with capacitor C 2 one ends, power switch pipe Q2 source electrode (or emitter) and diode D2 anode; Capacitor C 2 other ends are connected with DC power supply E2 negative pole with power switch pipe Q4 drain electrode (or collector electrode), inductance L 2; Power switch pipe Q4 drain electrode (or collector electrode) is connected with capacitor C 2, inductance L 2, DC power supply E2 negative pole, and power switch pipe Q4 source electrode (or emitter) is connected with capacitor C 1, diode D1 anode and diode D4 anode; Diode D4 negative electrode is connected with power switch pipe Q3 source electrode (or emitter) with DC power supply E2 anode.
Described anti-group of Buck-Boost converter comprises power switch pipe Q1/Q2, inductance L 1, diode D1, output capacitance C1 and sustained diode 2, power switch pipe Q1 drain electrode (or collector electrode) is connected with diode D2 negative electrode with DC power supply E1 is anodal, and its source electrode (or emitter) is connected with diode D1 negative electrode with inductance L 1 one ends; Inductance L 1 other end is connected with DC power supply E1 negative pole, capacitor C 1 and power switch pipe Q2 drain electrode (or collector electrode); Diode D1 anode is connected with capacitor C 1 one ends, power switch pipe Q4 source electrode (or emitter) and diode D4 anode; Capacitor C 1 other end is connected with DC power supply E1 negative pole with power switch pipe Q2 drain electrode (or collector electrode), inductance L 1; Power switch pipe Q2 drain electrode (or collector electrode) is connected with capacitor C 1, inductance L 1, DC power supply E1 negative pole, and power switch pipe Q2 source electrode (or emitter) is connected with capacitor C 2, diode D3 anode and diode D2 anode; Diode D2 negative electrode is connected with power switch pipe Q1 source electrode (or emitter) with DC power supply E1 anode.The tie point of power switch pipe Q4 source electrode (or emitter) and capacitor C 1, diode D1 anode and diode D4 anode, the tie point of power switch pipe Q2 source electrode (or emitter) and capacitor C 2, diode D3 anode and diode D2 anode, respectively as the single phase alternating current (A.C.) output, accesses single-phase electrical network or AC load.
Described power switch pipe Q1-Q4 is the HF switch pipe, and selecting device is unidirectional full control MOSFET or IGBT, and comprise six kinds of forms as shown in Figure 2: (1) is the metal-oxide-semiconductor of occlusion body diode not; (2) metal-oxide-semiconductor of occlusion body diode and diode cascaded structure, wherein the metal-oxide-semiconductor source electrode is connected with diode anode; (3) metal-oxide-semiconductor of occlusion body diode and diode cascaded structure, wherein the metal-oxide-semiconductor drain electrode is connected with diode cathode; (4) IGBT of occlusion body diode not; (5) IGBT of occlusion body diode and diode cascaded structure, wherein the IGBT emitter is connected with diode anode; (6) IGBT of occlusion body diode and diode cascaded structure, wherein the IGBT collector electrode is connected with diode cathode.Power switch pipe Q1/Q3 adopts constant frequency PWM copped wave to control, and power switch pipe Q2/Q3 adopts hysteresis current to control.
Described control method, be in positive half cycle, only has and just organize converter work, and switching tube Q3 adopts voltage close loop to control, when the output capacitance voltage U
C2Be less than given magnitude of voltage V
refThe time, the pwm signal duty ratio of Q3 increases; Work as U
C2Be greater than V
refThe time, the pwm signal duty ratio of Q3 reduces.Switching tube Q4 adopts hysteresis current to control.The driving signal of the control signal of Q4 and constant frequency PWM signal phase and rear generation Q3, only that is to say that control signal at Q4 just allows pwm signal to drive Q3 when effective, and Q3 is in off state in other cases.
Described control method, be in negative half period, only has anti-group of converter work, and switching tube Q1 adopts voltage close loop to control, and when output capacitance voltage is less than given magnitude of voltage, the pwm signal duty ratio of Q1 increases; When output capacitance voltage is greater than given magnitude of voltage, the pwm signal duty ratio of Q1 reduces.Q2 adopts hysteresis current to control.The driving signal of the control signal of Q2 and constant frequency PWM signal phase and rear generation Q1, only that is to say that control signal at Q2 just allows pwm signal to drive Q1 when effective, and Q1 is in off state in other cases.
The utility model compared with prior art has the following advantages:
1, circuit design is reasonable and cost is low.
2, adopt high-frequency inductor, volume is little, the integrated convenience of circuit.
3, simple in structure, symmetry is good, is easy to realize, parameter can be passed through software adjustment.
4, Buck-Boost converter and fly-wheel diode coordinate, and realize the automatic afterflow to the resistance sense load, and load current is back to DC power supply and output capacitance, re-use, and capacity usage ratio is high.
5, fast response time, precision is high, strong robustness, input direct voltage haves a wide reach, and two input direct voltages also can equate can be different.
The accompanying drawing explanation
Fig. 1 is the composition schematic diagram of the utility model circuit.
Fig. 2 is main circuit schematic diagram of the present utility model.
Fig. 3 is 6 kinds of usual ways of the utility model unidirectional power switching tube.
Fig. 4 is the utility model power switch tube drives pulse sequence figure.
Fig. 5 is that the utility model is just being organized converter mode of operation 1.
Fig. 6 is that the utility model is just being organized converter mode of operation 2.
Fig. 7 is that the utility model is just being organized converter mode of operation 3.
Embodiment
As shown in Figure 1 and Figure 2, hysteresis current is controlled two Buck-Boost inverters and is comprised: two independent direct current power supplies, just/counter group Buck-Boost converter, just/counter group of output capacitance voltage detecting circuit, load current detection circuit and the control circuit that DSP or dsPIC be control core of take.
The described Buck-Boost converter of just organizing comprises power switch pipe Q3/Q4, inductance L 2, diode D3, output capacitance C2 and sustained diode 4, power switch pipe Q3 drain electrode (or collector electrode) is connected with diode D4 negative electrode with DC power supply E2 is anodal, and its source electrode (or emitter) is connected with diode D3 negative electrode with inductance L 2 one ends; Inductance L 2 other ends are connected with DC power supply E2 negative pole, capacitor C 2 and power switch pipe Q4 drain electrode (or collector electrode); Diode D3 anode is connected with capacitor C 2 one ends, power switch pipe Q2 source electrode (or emitter) and diode D2 anode; Capacitor C 2 other ends are connected with DC power supply E2 negative pole with power switch pipe Q4 drain electrode (or collector electrode), inductance L 2; Power switch pipe Q4 drain electrode (or collector electrode) is connected with capacitor C 2, inductance L 2, DC power supply E2 negative pole, and power switch pipe Q4 source electrode (or emitter) is connected with capacitor C 1, diode D1 anode and diode D4 anode; Diode D4 negative electrode is connected with power switch pipe Q3 source electrode (or emitter) with DC power supply E2 anode.
Described anti-group of Buck-Boost converter comprises power switch pipe Q1/Q2, inductance L 1, diode D1, output capacitance C1 and sustained diode 2, power switch pipe Q1 drain electrode (or collector electrode) is connected with diode D2 negative electrode with DC power supply E1 is anodal, and its source electrode (or emitter) is connected with diode D1 negative electrode with inductance L 1 one ends; Inductance L 1 other end is connected with DC power supply E1 negative pole, capacitor C 1 and power switch pipe Q2 drain electrode (or collector electrode); Diode D1 anode is connected with capacitor C 1 one ends, power switch pipe Q4 source electrode (or emitter) and diode D4 anode; Capacitor C 1 other end is connected with DC power supply E1 negative pole with power switch pipe Q2 drain electrode (or collector electrode), inductance L 1; Power switch pipe Q2 drain electrode (or collector electrode) is connected with capacitor C 1, inductance L 1, DC power supply E1 negative pole, and power switch pipe Q2 source electrode (or emitter) is connected with capacitor C 2, diode D3 anode and diode D2 anode; Diode D2 negative electrode is connected with power switch pipe Q1 source electrode (or emitter) with DC power supply E1 anode.The tie point of the tie point of power switch pipe Q4 source electrode (or emitter) and capacitor C 1, diode D1 anode and diode D4 anode, power switch pipe Q2 source electrode (or emitter) and capacitor C 2, diode D3 anode and diode D2 anode, respectively as the single phase alternating current (A.C.) output, accesses single-phase electrical network or AC load.
Power switch tube drives pulse sequence figure as shown in Figure 4, on off operating mode according to power switch pipe Q3/Q4, the operating state of just organizing converter can be divided into to three patterns, on off operating mode according to power switch pipe Q1/Q2, counter group of converter can be divided into to three identical mode of operations equally, due to just/counter group of Buck-Boost transformer configuration symmetry, mode of operation is identical, existing only take just organize converter and each mode of operation be described further as example.
Mode of operation 1: power switch pipe Q2/Q4 conducting, output cathode voltage, load current increases.
Power switch pipe Q2/Q4 conducting, circuit diagram as shown in Figure 5.DC power supply E2 is by the outside transferring energy of inductance L 2, if ignore the conduction voltage drop of device, inductive drop UL1=E2 is greater than zero, thus inductive current increase gradually, while load voltage U
Load=U
C2Be greater than zero, so load current also increases gradually, as shown by the arrows in Figure 5, in figure, dotted line place indication circuit disconnects current circuit, does not have electric current to flow through, lower same.
Mode of operation 2: power switch pipe Q4 conducting, Q2 turn-offs, output cathode voltage, load current increases.
Power switch pipe Q4 conducting, Q2 turn-offs, and circuit diagram is as shown in Figure 6.Power supply E2 disconnects, and inductance L 2 continues outside transferring energy.If ignore the break-over of device pressure drop, inductive drop U
L1=-U
C2Be less than zero, thus inductive current reduce gradually, load voltage U simultaneously
Load=U
C2Be greater than zero, so load current increases gradually, current circuit as shown by the arrows in Figure 6.
Mode of operation 3: power switch pipe Q2/Q4 turn-offs, and output voltage is zero, and load current reduces.
Power switch pipe Q2/Q4 turn-offs, and is just organizing converter and load and is disconnecting, and circuit diagram as shown in Figure 7.Sustained diode 2 conductings, load → D
2→ E
1→ C
1Form loop, load is by the continuous current circuit afterflow, if ignore the break-over of device pressure drop, load voltage U
Load=-E
1-U
C2Be less than zero, so load current reduces gradually, load is to DC power supply E1 and capacitor C 1 feedback electric energy, and current circuit as shown by the arrows in Figure 7.
Claims (4)
1. a hysteresis current is controlled two Buck-Boost inverters, it is characterized in that comprising two independent direct current power supplies, just group and counter group of Buck-Boost converter, just group and counter group of output capacitance voltage detecting circuit, load current detection circuit and the control circuit that DSP or dsPIC30F be control core of take.
2. hysteresis current according to claim 1 is controlled two Buck-Boost inverters, it is characterized in that: the described Buck-Boost converter of just organizing comprises power switch pipe Q3/Q4, inductance L 2, diode D3, output capacitance C2 and sustained diode 4, power switch pipe Q3 drain electrode or collector electrode are connected with diode D4 negative electrode with DC power supply E2 is anodal, and its source electrode or emitter are connected with diode D3 negative electrode with inductance L 2; Inductance L 2 one ends are connected with DC power supply E2 negative pole, capacitor C 2 and power switch pipe Q4 drain electrode or collector electrode, and inductance L 2 other ends are connected with power switch pipe Q3 source electrode or emitter with diode D3 negative electrode; Diode D3 anode is connected with diode D2 anode with capacitor C 2, power switch pipe Q2 source electrode or emitter, and diode D3 negative electrode is connected with capacitor C 2 with power switch pipe Q3 source electrode or emitter; Capacitor C 2 one ends are connected with power switch pipe Q4 drain electrode or collector electrode, inductance L 2 and DC power supply E2 negative pole, and capacitor C 2 other ends are connected with power switch pipe Q2 source electrode or emitter with diode D3 anode, diode D2 anode; Power switch pipe Q4 drain electrode or collector electrode are connected with capacitor C 2, inductance L 2, DC power supply E2 negative pole, and power switch pipe Q4 source electrode or emitter are connected with capacitor C 1, diode D1 anode and diode D4 anode; Diode D4 anode is connected with diode D1 anode, capacitor C 1 and power switch pipe Q4 source electrode or emitter, and diode D4 negative electrode is connected with power switch pipe Q3 source electrode or emitter with DC power supply E2 anode.
3. hysteresis current according to claim 1 is controlled two Buck-Boost inverters, it is characterized in that: described anti-group of Buck-Boost converter comprises power switch pipe Q1/Q2, inductance L 1, diode D1, output capacitance C1 and sustained diode 2, power switch pipe Q1 drain electrode or collector electrode are connected with diode D2 negative electrode with DC power supply E1 is anodal, and its source electrode or emitter are connected with diode D1 negative electrode with inductance L 1; Inductance L 1 one ends are connected with DC power supply E1 negative pole, capacitor C 1 and power switch pipe Q2 drain electrode or collector electrode, and inductance L 1 other end is connected with power switch pipe Q1 source electrode or emitter with diode D1 negative electrode; Diode D1 anode is connected with diode D4 anode with capacitor C 1, power switch pipe Q4 source electrode or emitter, and diode D1 negative electrode is connected with capacitor C 1 with power switch pipe Q1 source electrode or emitter; Capacitor C 1 one ends are connected with power switch pipe Q4 drain electrode or collector electrode, inductance L 1 and DC power supply E1 negative pole, and capacitor C 1 other end is connected with power switch pipe Q4 source electrode or emitter with diode D1 anode, diode D4 anode; Power switch pipe Q2 drain electrode or collector electrode are connected with capacitor C 1, inductance L 1, DC power supply E1 negative pole, and power switch pipe Q2 source electrode or emitter are connected with capacitor C 2, diode D3 anode and diode D2 anode; Diode D2 anode is connected with diode D3 anode, capacitor C 2 and power switch pipe Q2 source electrode or emitter, diode D2 negative electrode is connected with power switch pipe Q1 source electrode or emitter with DC power supply E1 anode, the tie point of tie point, power switch pipe Q2 source electrode or the emitter of power switch pipe Q4 source electrode or emitter and capacitor C 1, diode D1 anode and diode D4 anode and capacitor C 2, diode D3 anode and diode D2 anode, respectively as the single phase alternating current (A.C.) output, accesses single-phase electrical network or AC load.
4. control two Buck-Boost inverters according to claim 2 or hysteresis current claimed in claim 3, it is characterized in that: described power switch pipe Q1-Q4 is the HF switch pipe, selecting device is unidirectional full control MOSFET or IGBT, comprises six kinds of forms: the metal-oxide-semiconductor of occlusion body diode not; The metal-oxide-semiconductor of occlusion body diode and diode cascaded structure, wherein the metal-oxide-semiconductor source electrode is connected with diode anode; The metal-oxide-semiconductor of occlusion body diode and diode cascaded structure, wherein the metal-oxide-semiconductor drain electrode is connected with diode cathode; The IGBT of occlusion body diode not; The IGBT of occlusion body diode and diode cascaded structure, wherein the IGBT emitter is connected with diode anode; The IGBT of occlusion body diode and diode cascaded structure, wherein the IGBT collector electrode is connected with diode cathode, and power switch pipe Q1/Q3 adopts constant frequency PWM copped wave to control, and power switch pipe Q2/Q4 adopts hysteresis current to control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013203196217U CN203326914U (en) | 2013-06-05 | 2013-06-05 | Hysteresis current control double Buck-Boost inverter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111585433A (en) * | 2020-05-07 | 2020-08-25 | 国网重庆市电力公司电力科学研究院 | Universal interface, control method and energy storage system |
| CN113872437A (en) * | 2021-08-17 | 2021-12-31 | 西安电子科技大学 | High-efficiency pulse load power supply and voltage hysteresis control method thereof |
-
2013
- 2013-06-05 CN CN2013203196217U patent/CN203326914U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111585433A (en) * | 2020-05-07 | 2020-08-25 | 国网重庆市电力公司电力科学研究院 | Universal interface, control method and energy storage system |
| CN111585433B (en) * | 2020-05-07 | 2022-02-11 | 国网重庆市电力公司电力科学研究院 | Universal interface, control method and energy storage system |
| CN113872437A (en) * | 2021-08-17 | 2021-12-31 | 西安电子科技大学 | High-efficiency pulse load power supply and voltage hysteresis control method thereof |
| CN113872437B (en) * | 2021-08-17 | 2023-08-08 | 西安电子科技大学 | Pulse load power supply and voltage hysteresis control method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20140605 |