CN107896063A - A kind of New single-phase high-frequency isolation Z sources AC AC translation circuits - Google Patents
A kind of New single-phase high-frequency isolation Z sources AC AC translation circuits Download PDFInfo
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- CN107896063A CN107896063A CN201711046901.4A CN201711046901A CN107896063A CN 107896063 A CN107896063 A CN 107896063A CN 201711046901 A CN201711046901 A CN 201711046901A CN 107896063 A CN107896063 A CN 107896063A
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- circuit
- igbt
- switching tubes
- high frequency
- sources
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Classifications
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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
- 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
- H02M5/22—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 discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—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 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
- H02M5/293—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 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
Abstract
The present invention is a kind of New single-phase high-frequency isolation Z sources AC AC translation circuits, belongs to AC AC field of conversion of electrical energy.The present invention includes Z sources AC AC conversion main circuits and control circuit, and main circuit is made up of single phase alternating current power supply, Z source converters, filter capacitor and four parts of load, and wherein Z source converters include energy storage inductor LB, 3 groups of the IGBT switching tubes of differential concatenation, two storage capacitor C two-by-two1、C2An and single-phase high frequency transformer；Control circuit is made up of controller, IGBT drive circuit and driving power module, on three groups of IGBT switching tubes that wherein controller is connected in Z source converters by IGBT drive circuit, so as to control the break-make of three groups of IGBT switching tubes, driving power module is connected with IGBT drive circuit, is three tunnel IGBT drive circuit power supplies.Circuit realiration input and output electrical isolation and the function of entering boosting and decompression to alternating current, and the circuit can also save component, reduce AC AC alternative costs, reduce the volume of converter, reduce the loss of electric energy.
Description
Technical field
The present invention relates to AC-AC field of conversion of electrical energy, more particularly to a kind of single-phase Z sources AC-AC with high-frequency isolation link
Translation circuit.
Background technology
In Power Electronic Technique, the AC applications field of voltage-regulation, AC-AC converters typically all apply Z sources and opened up
Flutter structure, the structure not only have single stage shift, low harmonic current, more preferable power factor and efficiency, smaller szie and it is low into
This advantages that, while can also have inversion or keep phase angle, carry out the characteristics of buck.
Traditional Z sources AC converter is made up of by one two identical inductance and two identical electric capacity
Mains side and load-side are coupled together by Z source networks, there is provided a kind of unique buck mechanism.When it is used as dynamic voltage compensation
, it is necessary to bulky frequency converter be added outside, with input side and output when device is to compensate voltage of power rapid drawdown and expansion
Electrical isolation is provided between side.The frequency converter volume is big, weight is high, cost is high, loss is big, and exist start surge current with
Saturation problem, low-frequency transformer impedance used at the same time can cause voltage to reduce, and under nonlinear load voltage harmonic compared with
It is more.
High frequency transformer isolation (HFTI) Z sources AC-AC converters of new generation, are in traditional Z sources AC converter circuit knot
Surveyed on the basis of structure in power supply and add a high frequency transformer between load-side, for the electrical isolation between input and output.
When as dynamic voltage compensator, without outside frequency converter, it is controlled using two-way switch and some passive blocks, but
It is that the passive block used is excessive, so as to add the cost of device, volume and loss.
The content of the invention
The embodiments of the invention provide a kind of New single-phase high-frequency isolation Z sources AC-AC translation circuits, possesses electrical isolation work(
Can, while AC-AC transformation of electrical energy performances are ensured, the enough saving components of and can, reduce cost.Fig. 1 gives this new list
The general structure of phase high-frequency isolation Z sources AC-AC translation circuits, the circuit are made up of main circuit and control circuit, and main circuit exists
The conversion of AC-AC electric energy is realized under the regulation and control of control circuit.
The first aspect of the embodiment of the present invention is to provide Z sources AC-AC transformation of electrical energy main circuits, and Fig. 2 gives main circuit
Specific topological structure.As shown in Fig. 2 Z sources AC-AC transformation of electrical energies main circuit includes single phase alternating current power supply, Z source converters, filtering
Electric capacity C0With load R0, wherein, one side of the Z source converters is connected with the single phase alternating current power supply, tells Z source converters
Another side is connected to the load R by the filter capacitor0。
The Z source converters include energy storage inductor LB, the IGBT switching tubes S of 3 groups of differential concatenations two-by-two1、S2、S3, two storages
Can electric capacity C1、C2An and single-phase high frequency transformer.Wherein, the IGBT switching tubes S of the differential concatenation1One end with it is described
Storage capacitor C1One end be connected and be connected to the energy storage inductor LBOne end, the energy storage inductor LBThe other end be connected to
One end of the outside one-way communication power supply, the IGBT switching tubes S of the differential concatenation1The other end and the high frequency transformer
One end of primary side is connected, while the storage capacitor C1The other end be connected to the another of the high frequency transformer primary side
End, the IGBT switching tubes S2 of same differential concatenation one end and the storage capacitor C2One end be connected and be connected to outside
The other end of the single phase alternating current power supply, the storage capacitor C2The other end and the high frequency transformer primary side one end phase
Connect, while the IGBT switching tubes S of the differential concatenation2The other end be connected with the other end of the high frequency transformer primary side.
The IGBT switching tubes S that one end of the high frequency transformer secondary side passes through the differential concatenation3It is connected to the outside filtered electrical
Hold C0One end, the other end of the high frequency transformer secondary side then with the filter capacitor C0The other end be connected.
According to the IGBT switching tubes S of described three groups differential concatenations two-by-two1、S2、S3The difference of on off state, circuit share two
Kind working condition.Wherein, during working condition 1, the IGBT switching tubes S1 of the differential concatenation is open-minded, switching tube S2、S3Shut-off, institute
State the energy stored in high frequency transformer first siding ring and be discharged into the storage capacitor C1In, to C1Charged, at the same it is described
Storage capacitor LB also charges to the storage capacitor C2, now the filter capacitor C0Release energy into load, maintain
Load running；During working condition 2, the IGBT switching tubes S of the differential concatenation1Shut-off, switching tube S2、S3It is open-minded, the now storage
Can electric capacity C2Electric discharge, the high frequency transformer first siding ring is carried out to fill energy, energy flows to the filtered electrical by transformer
Hold C0, to C0Charge and keep load running, while the storage capacitor C1Electric discharge is to the energy storage inductor LBCarry out filling energy.It is logical
The accounting of two kinds of working conditions of adjustment circuit is crossed, to adjust the size of output voltage.
The second aspect of the embodiment of the present invention is to provide the Z source converters control circuit, and Fig. 3 gives control circuit
Concrete structure.As shown in figure 3, Z source converters control circuit includes controller, IGBT drive circuit and driving power module.Its
In, the controller is connected on three groups of IGBT switching tubes in the Z source converters by the IGBT drive circuit, so as to
Control the break-make of three groups of IGBT switching tubes.The driving power module is connected with the IGBT drive circuit, is driven for three road IGBT
Dynamic circuit power supply.The controller can export three road PWM trigger pulses, control described three groups differential concatenations two-by-two respectively
IGBT switching tubes S1、S2、S3Break-make, so as to control circuit alternately be in the working condition 1 and working condition 2.Wherein S2、S3
Trigger pulse is identical, and and S1Trigger pulse by the controller on the contrary, adjust three groups of IGBT switching tubes S1、S2、S3Trigger arteries and veins
The dutycycle of punching can adjust the size of the circuit output voltage.Work as S1When trigger pulse dutycycle is equal to 0~0.33, the electricity
Road is operated in decompression state；Work as S1When trigger pulse dutycycle is equal to 0.33~1, the circuit is operated in pressure-increasning state.
Brief description of the drawings
Fig. 1 is the New single-phase high-frequency isolation Z sources AC-AC translation circuit general structures of the embodiment of the present invention
Fig. 2 is the Z sources AC-AC transformation of electrical energy main circuit topologies of the embodiment of the present invention
Fig. 3 is the Z source converter controling circuit structures of the embodiment of the present invention
Fig. 4 is the simulink simulation models of the embodiment of the present invention
Table 1 is emulation or each component parameters of experimental model
Fig. 5 is the simulation waveform of circuit when input voltage virtual value is 100V
Fig. 6 is the simulation waveform of circuit when input voltage virtual value is 400V
Fig. 7 is that single-phase high frequency isolates Z sources AC-AC converter experimental models
Fig. 8 is the experimental waveform of circuit when input voltage is 100V
Fig. 9 is the experimental waveform of circuit when input voltage is 400V
Embodiment
To make the performance of the embodiment of the present invention, effect and advantage clearer, will be proposed below in the embodiment of the present invention
This New single-phase high-frequency isolation Z sources AC-AC translation circuits carry out emulation testing in simulink, and build 220V's
AC-AC converters mock-up carries out experiment test.Test result is shown by the accompanying drawing in the embodiment of the present invention.
Initially set up simulink simulation models.The simulation model includes single phase alternating current power supply, energy storage inductor LB, 3 group two
The IGBT switching tubes S of two differential concatenations1、S2、S3, two storage capacitor C1、C2And single-phase high frequency transformer, a filter capacitor
C0With load R0, specific connected mode is as shown in Figure 4.
The parameter of each element is configured according to table 1 in simulation model, wherein 3 groups of two-way IGBT switching tubes S1、S2、S3's
Trigger pulse is given by 3 groups of pulse modules, S2、S3Trigger pulse is identical, and and S1Trigger pulse is on the contrary, in pulse modules
It is middle that each pulse duty factor is set.High frequency transformer uses preferable linear transformer, wherein just the voltage ratio of secondary coil is 1:1,
Coil inductance and resistance are arranged to 0, magnetizing inductance LmIt is arranged to 10mH.This analogue system is sampled using discrete type, the sampling time
For 5e-07s.
The voltage effective value of single phase alternating current power supply is first arranged to 100V, switching tube S1Trigger pulse dutycycle is arranged to
0.4074, S2、S3Trigger pulse dutycycle is arranged to 0.5926, and system is in pressure-increasning state.Click on simulation run and obtain input electricity
Press Vin, storage capacitor C1Voltage VC1, storage capacitor C2Voltage VC2And output voltage VOWaveform, inductance LBBecome with high frequency
Depressor first siding ring voltage VLPWaveform it is as shown in Figure 5.From the point of view of simulation result, each voltage waveform all with circuit theory phase
Meet, and waveform stabilization, harmonic content is seldom,.In addition, input voltage VinAmplitude is 141V, and output voltage V0Amplitude be
311V, it is seen that circuit boost effect is good, and its result meets this circuit voltage Principles of Regulation.
The voltage effective value of single phase alternating current power supply is arranged to 400V, switching tube S again1Trigger pulse dutycycle is arranged to
0.2619, S2、S3Trigger pulse dutycycle is arranged to 0.7381, and system is in decompression state.Click on simulation run and obtain input electricity
Press Vin, storage capacitor C1Voltage VC1, storage capacitor C2Voltage VC2And output voltage VOWaveform, inductance LBBecome with high frequency
Depressor first siding ring voltage VLPWaveform it is as shown in Figure 6.From the point of view of simulation result, each voltage waveform all with circuit theory phase
Meet, and waveform stabilization, harmonic content are seldom.In addition, input voltage VinAmplitude is 566V, and output voltage VOAmplitude be
311V, it is seen that circuit antihypertensive effect is good, and its result meets this circuit voltage Principles of Regulation.
Then the single-phase high frequency that an output voltage is 220V is built again isolates AC-AC converter experimental models.Such as Fig. 7
Shown, the converter model includes main circuit and control circuit, and wherein main circuit is by single phase alternating current power supply, energy storage inductor LB, 3 groups
The IGBT switching tubes S of differential concatenation two-by-two1、S2、S3, two storage capacitor C1、C2And single-phase high frequency transformer, a filtered electrical
Hold C0With load R0Composition, each component parameters select according to table 1, and connected mode is identical with simulink simulation models.Control circuit
Including controller, IGBT drive circuit and driving power module, controller is realized by FPGA cyclone chips, is driven by IGBT
Dynamic circuit is connected on the gate pole of three groups of IGBT switching tubes in main circuit, and driving power module is connected with IGBT drive circuit,
For three tunnel IGBT drive circuit power supplies.
Single phase alternating current power supply of the voltage effective value for 100V is first selected, IGBT switching tubes S is set by controller1Gate pole
The dutycycle of trigger signal is 0.4074, IGBT switching tubes S2、S3Gate pole trigger signal dutycycle be 0.5926.Now measure
The output voltage V of converterOAnd transformer first siding ring voltage VPWaveform it is as shown in Figure 8.Output voltage amplitude is
311V, circuit are in boost mode, and waveform stabilization, and harmonic content is seldom, and boost effect is good, and experimental result coincident circuit is former
Reason.
Reselection voltage effective value is 400V single phase alternating current power supply, and IGBT switching tubes S is set by controller1Gate pole
The dutycycle of trigger signal is 0.2619, IGBT switching tubes S2、S3Gate pole trigger signal dutycycle be 0.7381, now measure
The output voltage V of converterOAnd transformer first siding ring voltage VPWaveform it is as shown in Figure 9.Output voltage amplitude is
311V, circuit are in decompression mode, and waveform stabilization, and harmonic content is seldom, and antihypertensive effect is good, and experimental result coincident circuit is former
Reason.
It is noted that embodiments described above is a part for the embodiment of the present invention, rather than whole realities
Apply example.Any deformation made according to the embodiment of the present invention, will all without departing from the spirit and right of the present invention
Seek the scope of record.
Claims (5)
- A kind of 1. New single-phase high-frequency isolation Z sources AC-AC translation circuits, it is characterised in that：By Z sources AC-AC conversion main circuit and Control circuit forms, and main circuit is by single phase alternating current power supply, Z source converters, filter capacitor C0With load R0Composition, wherein the Z sources One side of converter is connected with the single phase alternating current power supply, and the another side of the Z source converters is connected by the filter capacitor To the load R0；Control circuit is made up of controller, IGBT drive circuit and driving power module.
- 2. Z sources AC-AC according to claim 1 converts main circuit, the Z source converters described in it are characterised by：By storing up Can inductance LB, the IGBT switching tubes S of 3 groups of differential concatenations two-by-two1、S2、S3, two storage capacitor C1、C2An and single-phase high frequency Transformer forms.Wherein, the IGBT switching tubes S of the differential concatenation1One end and the storage capacitor C1One end be connected and connect It is connected to the energy storage inductor LBOne end, the energy storage inductor LBThe other end be connected to the one of the outside one-way communication power supply End, the IGBT switching tubes S of the differential concatenation1The other end be connected with one end of the high frequency transformer primary side, while institute State storage capacitor C1The other end be connected to the other end of the high frequency transformer primary side, the IGBT of the same differential concatenation Switching tube S2One end and the storage capacitor C2One end be connected and be connected to the other end of the outside single phase alternating current power supply, The storage capacitor C2The other end be connected with one end of the high frequency transformer primary side, while the IGBT of the differential concatenation Switching tube S2The other end be connected with the other end of the high frequency transformer primary side.One end of the high frequency transformer secondary side Pass through the IGBT switching tubes S of the differential concatenation3It is connected to the outside filter capacitor C0One end, the high frequency transformer two The other end of secondary side then with the filter capacitor C0The other end be connected.
- 3. the Z source converters described in AC-AC conversion main circuits in Z sources according to claim 1 and claim 2, its feature It is, the IGBT switching tubes S of described three groups differential concatenations two-by-two1、S2、S3Alternate conduction and shut-off can make circuit be in not Two kinds of same working conditions, including：A. working condition 1：The IGBT switching tubes S of differential concatenation1It is open-minded, switching tube S2、S3Shut-off, side line of high frequency transformer The energy stored in circle is discharged into storage capacitor C1In, to C1Charged, while storage capacitor LBAlso to storage capacitor C2Carry out Charge, now filter capacitor C0Release energy into load, maintain load running；B. working condition 2：The IGBT switching tubes S of differential concatenation1Shut-off, switching tube S2、S3It is open-minded, now storage capacitor C2Electric discharge, High frequency transformer first siding ring is carried out to fill energy, energy flows to filter capacitor C by transformer0, to C0Charge and keep loading Operation, while storage capacitor C1Electric discharge is to energy storage inductor LBCarry out filling energy.
- 4. New single-phase high-frequency isolation Z sources according to claim 1 AC-AC translation circuits, the control circuit described in it is special Sign is：The controller is connected to three groups of IGBT switching tubes S in Z source converters by the IGBT drive circuit1、S2、S3 On, so as to control three groups of IGBT switching tubes S1、S2、S3Break-make.The driving power module and the IGBT drive circuit phase Even, it is three tunnel IGBT drive circuit power supplies.
- 5. control circuit according to claim 4, it is characterised in that：The controller can export three road PWM triggering arteries and veins Punching, the IGBT switching tubes S of three groups of differential concatenations two-by-two is controlled respectively1、S2、S3Break-make, so as to control circuit alternately be in right 3 described two different working conditions.Wherein S2、S3Trigger pulse is identical, and and S1Trigger pulse is on the contrary, pass through the controller Adjust IGBT switching tubes S1、S2、S3The dutycycle of trigger pulse adjusts the size of the circuit output voltage.S1Trigger pulse accounts for When sky is than being equal to 0~0.33, circuit is operated in decompression state；S1When trigger pulse dutycycle is equal to 0.33~1, circuit is operated in Pressure-increasning state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711046901.4A CN107896063A (en) | 2017-10-31 | 2017-10-31 | A kind of New single-phase high-frequency isolation Z sources AC AC translation circuits |
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| CN201711046901.4A CN107896063A (en) | 2017-10-31 | 2017-10-31 | A kind of New single-phase high-frequency isolation Z sources AC AC translation circuits |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11646671B1 (en) | 2021-10-12 | 2023-05-09 | Utah State University | Unfolder-based single-stage AC-AC conversion system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208726A (en) * | 2016-07-14 | 2016-12-07 | 厦门大学 | A kind of voltage-type Quasi Z Source AC AC changer |
| CN106300997A (en) * | 2016-08-03 | 2017-01-04 | 安徽理工大学 | A kind of single-phase high frequency isolated impedance source AC-AC Conversion device |
-
2017
- 2017-10-31 CN CN201711046901.4A patent/CN107896063A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208726A (en) * | 2016-07-14 | 2016-12-07 | 厦门大学 | A kind of voltage-type Quasi Z Source AC AC changer |
| CN106300997A (en) * | 2016-08-03 | 2017-01-04 | 安徽理工大学 | A kind of single-phase high frequency isolated impedance source AC-AC Conversion device |
Non-Patent Citations (2)
| Title |
|---|
| HAFIZ FURQAN AHMED ET AL: "A New Class of Single-Phase Isolated Z-Source AC–AC Converters With Isolated Reduced Passive Components", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》 * |
| HAFIZ FURQAN AHMED ET AL: "A Single-Phase Quasi-Z-Source AC-AC Converter with High-Frequency Transformer Isolation", 《2016 IEEE 8TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (IPEMC-ECCE ASIA)》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11646671B1 (en) | 2021-10-12 | 2023-05-09 | Utah State University | Unfolder-based single-stage AC-AC conversion system |
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Application publication date: 20180410 |