CN113824335A - Single-phase Z-source boosting type variable-frequency AC-AC converter - Google Patents

Single-phase Z-source boosting type variable-frequency AC-AC converter Download PDF

Info

Publication number
CN113824335A
CN113824335A CN202111102009.XA CN202111102009A CN113824335A CN 113824335 A CN113824335 A CN 113824335A CN 202111102009 A CN202111102009 A CN 202111102009A CN 113824335 A CN113824335 A CN 113824335A
Authority
CN
China
Prior art keywords
switch
diode
frequency
remains
energy storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111102009.XA
Other languages
Chinese (zh)
Other versions
CN113824335B (en
Inventor
何良宗
徐鑫勇
卢凤旺
周鸿彦
曾涛
张景瑞
关明杰
张建寰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen University
Original Assignee
Xiamen University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiamen University filed Critical Xiamen University
Priority to CN202111102009.XA priority Critical patent/CN113824335B/en
Publication of CN113824335A publication Critical patent/CN113824335A/en
Application granted granted Critical
Publication of CN113824335B publication Critical patent/CN113824335B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • 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
    • H02M5/297—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 for conversion of frequency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The single-phase Z-source boosting type variable-frequency AC-AC converter can realize boosting and variable-frequency AC-AC conversion; the Z-source boost type variable-frequency alternating-current converter consists of a Z-source network, a bidirectional switch, a polar switch unit, a power supply and a load; the bidirectional switch is formed by connecting the source electrodes of two full-control MOSFET switching devices in series, and the polarity switching unit is formed by connecting one full-control MOSFET switching device and one diode in series; by controlling the control time sequence of each switch, the alternating current output voltages with different amplitudes and different frequencies can be obtained, and the control mode is simple. Compared with the traditional alternating current converter, the alternating current converter adopts fewer switching devices, has the advantages of high energy conversion efficiency, light weight, high power density, low total power level of the devices and the like, has the safe current conversion characteristic, and is suitable for application occasions needing voltage transformation and frequency conversion alternating current output.

Description

Single-phase Z-source boosting type variable-frequency AC-AC converter
Technical Field
The invention relates to an alternating current-alternating current converter, in particular to a single-phase Z-source boost type variable frequency alternating current-alternating current converter.
Background
Many industrial applications, such as adjustable speed drives, require ac-ac conversion systems with flexible output voltage regulation capabilities. The most important is the voltage amplitude regulation capability and the frequency conversion capability. The traditional direct alternating current-alternating current converter has simple structure, wide voltage regulation capability and better output waveform, but is not suitable for many application occasions due to the lack of frequency conversion capability; the AC-DC-AC converter can obtain output voltage with any amplitude and frequency through multi-level energy conversion, but needs larger DC bus capacitance and inductance, thereby increasing cost, volume and power loss; the traditional matrix converter can obtain ideal variable-frequency alternating current output, but the structure and the control strategy are complex. In recent years, a single-phase variable frequency ac-ac converter has been proposed, which has a simpler structure and control strategy than a matrix converter and can realize amplitude adjustment and frequency adjustment of output voltage. The method is suitable for occasions with relatively low requirements on the quality of voltage waveforms in industry, such as a radio frequency induction heating device, a traction converter and a fan converter isolated by a medium-frequency transformer, a dynamic voltage restorer and the like.
Disclosure of Invention
The invention aims to provide a single-phase Z-source boost type variable-frequency alternating-current converter which can realize boost and buck and variable-frequency alternating-current voltage output.
The invention adopts the following technical scheme:
the invention comprises an alternating current power supply, an input capacitor, a bidirectional switch, a Z source network, a polarity switch unit, an output filter capacitor and a load; the Z source network comprises two input ends and two output ends; the polarity switch unit comprises two input ends and two output ends;
the bidirectional switch is composed of a first switch S1aA second switch S1bComposition is carried out; the Z source network is composed of a first energy storage inductor L1Second energy storage inductor L2A first energy storage capacitor C1A second energy storage capacitor C2Composition is carried out; the polarity switch unit is composed of a third switch S2aFourth switch S2bFifth switch S3aThe sixth switch S3bAnd a first diode D1aA second diode D1bA third diode D2aFourth diode D2bFifth diode D3aA sixth diode D3bComposition is carried out;
the first switch S1aSource and second switch S1bAre connected with each other; the first energy storage capacitor C1Is connected to the first energy storage inductor L1First terminal and second energy storage inductor L2A second end of (a); the second energy storage capacitor C2Is connected to the first energy storage inductor L1Second terminal and second energy storage inductor L2A first end of (a); the first diode D1aAnode of and a second diode D1bThe anode of (2) is connected; the third switch S2aDrain and first diode D1aThe cathode of (a) is connected; the third diode D2aAnode and third switch S2aA source level connection of; the fifth switch S3aDrain and third diode D2aThe cathode of (a) is connected; the fifth diode D3aAnd a fifth switch S3aA source level connection of; the fifth diode D3aCathode and first diode D1aThe anode of (2) is connected; the fourth switch S2bAnd a second diode D1bThe cathode of (a) is connected; the fourthDiode D2bAnode and fourth switch S2bA source level connection of; the sixth switch S3bDrain and fourth diode D2bThe cathode of (a) is connected; the sixth diode D3bAnd a sixth switch S3bA source level connection of; the sixth diode D3bCathode of and a second diode D1bThe anode of (2) is connected;
the input AC power supply is connected with an input capacitor CinBoth ends of (a); the input capacitor CinAre connected to a first switch S1aAnd the second energy storage inductor L2Between the first ends of (a); the second switch S2aDrain and first energy storage inductor L1Is connected with the first end of the first connecting pipe; the first energy storage inductor L1Second terminal and first diode D1aThe cathode of (a) is connected; the second energy storage inductor L2Second terminal and second diode D1bThe cathode of (a) is connected; the output filter capacitor CoIs connected to a third diode D2aCathode of and a fourth diode D2bBetween the cathodes of (a).
The invention has four working states during working, which are respectively as follows: a positive half cycle in-phase output state, a positive half cycle reverse phase output state, a negative half cycle in-phase output state and a negative half cycle reverse phase output state;
order S1aRemains on, S1bRemains off, S2aRemains on, S2bRemains off, S3bRemains on, only S3aCarrying out high-frequency switching-on and switching-off, wherein the circuit is in a positive half cycle in-phase output state; order S1bRemains off, S2bRemains on, S3aRemains on, S3bRemains off, S1aAnd S2aPerforming high-frequency complementary on-off, wherein the circuit is in a positive half cycle inverted output state;
order S1aRemains off, S1bRemains on, S2aRemains off, S2bRemains on, S3aRemains on, only S3bCarrying out high-frequency switching on and off, wherein the circuit is in a negative half cycle in-phase output state; order S1aRemains off, S2aRemains on, S3aRemains off, S3bRemains on, S1bAnd S2bPerforming high-frequency complementary on-off, wherein the circuit is in a negative half cycle inverted output state;
in the four working states, the state that the output end of the Z source network is directly connected is called a through state, and the through state comprises S in a positive half cycle in-phase output state3aMode of opening, S in positive half cycle inverted output state2aOpening, S1aOff mode, S in negative half cycle in-phase output state3bOn mode and S in negative half cycle inverted output state2bOpening, S1bThe mode of shutdown.
The time duty ratio of the through state in one switching period is D, and the amplitude of the output voltage can be adjusted by adjusting the duty ratio D.
By changing four operating states of the circuit at appropriate times during one period of the input voltage line, it is possible to realize the rise or fall of the fundamental frequency of the output voltage.
When the positive half cycle is in the same phase output state, the ratio of the output voltage to the input voltage is as follows:
Figure BDA0003271055200000021
when the negative half cycle is in the reverse phase output state, the ratio of the output voltage to the input voltage is as follows:
Figure BDA0003271055200000031
when the positive half cycle is in the reverse phase output state, the ratio of the output voltage to the input voltage is as follows:
Figure BDA0003271055200000032
when the negative half cycle is in the same phase output state, the ratio of the output voltage to the input voltage is as follows:
Figure BDA0003271055200000033
first switch S of the invention1aA second switch S1bAnd a third switch S2aAnd a fourth switch S2bThe fifth switch S3aAnd a sixth switch S3bEach of which is composed of a fully-controlled device MOSFET.
The Z-source network structure enables the capacitor and the inductor to be directly connected without generating capacitor voltage short circuit or inductor current short circuit, thereby avoiding the safety commutation problem commonly existing in the traditional alternating current-alternating current converter.
According to the single-phase Z-source boost type variable-frequency alternating current-alternating current converter, the amplitude of the output voltage can be adjusted by changing the duty ratio occupied by the direct connection state, and the increase or decrease of the fundamental frequency of the output voltage can be realized by timely changing the working state of the circuit. Compared with a common alternating current-alternating current converter, the alternating current-alternating current converter has the advantages of adopting fewer switching devices, having higher energy conversion efficiency, being capable of realizing voltage transformation and frequency conversion functions at the same time, having simple structure, convenient control, light weight, high power density, safe current conversion characteristic and the like.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the circuit structure of the present invention;
FIG. 2 is a schematic diagram of a Z-source network architecture;
FIG. 3 is a schematic diagram of a polarity switch network;
FIG. 4 is a waveform diagram illustrating exemplary variable frequency operating conditions, including input voltage waveforms, switch drive signals, and output voltage waveforms; wherein (a) represents a 2-fold down-conversion output; (b) representing a common frequency output; (c) represents a 2 times up-converted output;
FIG. 5 is a switched mode equivalent circuit according to an embodiment of the present invention; wherein (a) represents mode 1; (b) represents modality 2; (c) represents modality 3; (d) represents modality 4; (e) represents modality 5; (f) represents modality 6; (g) represents modality 7; (h) representing modality 8.
Detailed Description
The invention will be further elucidated with reference to the drawings and examples.
The first embodiment is as follows:
referring to fig. 1 to 3, the embodiment of the present invention includes an ac power supply, an input capacitor, a bidirectional switch, a Z source network, a polarity switch unit, an output filter capacitor, and a load; the bidirectional switch is composed of a first switch S1a and a second switch S1 b; the Z source network consists of a first energy storage inductor L1, a second energy storage inductor L2, a first energy storage capacitor C1 and a second energy storage capacitor C2; the polarity switching unit is composed of a third switch S2a, a fourth switch S2b, a fifth switch S3a, a sixth switch S3b, a first diode D1a, a second diode D1b, a third diode D2a, a fourth diode D2b, a fifth diode D3a, and a sixth diode D3 b;
the first switch S1aSource and second switch S1bAre connected with each other; the first energy storage capacitor C1Is connected to the first energy storage inductor L1First terminal and second energy storage inductor L2A second end of (a); the second energy storage capacitor C2Is connected to the first energy storage inductor L1Second terminal and second energy storage inductor L2A first end of (a); the first diode D1aAnode of and a second diode D1bThe anode of (2) is connected; the third switch S2aDrain and first diode D1aThe cathode of (a) is connected; the third diode D2aAnode and third switch S2aA source level connection of; the fifth switch S3aDrain and third diode D2aThe cathode of (a) is connected; the fifth diode D3aAnd a fifth switch S3aA source level connection of; the fifth diode D3aCathode and first diode D1aThe anode of (2) is connected; the fourth switch S2bAnd a second diode D1bThe cathode of (a) is connected; the fourth diode D2bAnode and fourth switch S2bA source level connection of; the sixth switch S3bDrain and fourth diode D2bThe cathode of (a) is connected; the sixth diode D3bAnd a sixth switch S3bA source level connection of; the sixth diode D3bCathode of and a second diode D1bThe anode of (2) is connected;
the input AC power supply is connected with an input capacitor CinBoth ends of (a); the input capacitor CinAre connected to a first switch S1aAnd the second energy storage inductor L2Between the first ends of (a); the second switch S2aDrain and first energy storage inductor L1Is connected with the first end of the first connecting pipe; the first energy storage inductor L1Second terminal and first diode D1aThe cathode of (a) is connected; the second energy storage inductor L2Second terminal and second diode D1bThe cathode of (a) is connected; the output filter capacitor CoIs connected to a third diode D2aCathode of and a fourth diode D2bBetween the cathodes of (a);
in this embodiment, the converter is in a 2-fold down-conversion output state, the switching waveform thereof is as shown in fig. 4(a), and the switching waveforms thereof have 8 switching modes, as shown in fig. 5(a) to (h), respectively, and the switching states thereof are analyzed as follows:
the first positive half cycle of the input alternating current power supply is in a positive half cycle in-phase output state: mode 1: switch S1a、S2a、S3a、S3bOn, switch S1b、S2bThe Z source network is in a direct-through state when the capacitor C is switched off1、C2Discharge, inductance L1、L2And (6) charging. The modal duration is DTswAnd D<0.5; mode 2: switch S1a、S2a、S3bOn, switch S1b、S2b、S3aOff, capacitance C1、C2Charging, inductance L1、L2And (4) discharging. The modal duration is (1-D) Tsw. The ratio of the output voltage to the input voltage is:
Figure BDA0003271055200000041
the first negative half cycle of the input alternating current power supply is in a negative half cycle inverted output state: modality 3: switch S2a、S2b、S3bOn, switch S1a、S1b、S3aThe Z source network is in a direct-through state when the capacitor C is switched off1、C2Charging, inductance L1、L2And (4) discharging. The modal duration is DTswAnd D>0.5; modality 4: switch S1b、S2a、S3bOn, switch S1a、S2b、S3aOff, capacitance C1、C2Discharge, inductance L1、L2And (6) charging. The modal duration is (1-D) Tsw. The ratio of the output voltage to the input voltage is:
Figure BDA0003271055200000051
the second positive half cycle of the input alternating current power supply is in a positive half cycle inverted output state: mode 5: switch S2a、S2b、S3aOn, switch S1a、S1b、S3bThe Z source network is in a direct-through state when the capacitor C is switched off1、C2Charging, inductance L1、L2And (4) discharging. The modal duration is DTswAnd D>0.5; modality 6: switch S1a、S2b、S3aOn, switch S1b、S2a、S3bOff, capacitance C1、C2Discharge, inductance L1、L2And (6) charging. The ratio of the output voltage to the input voltage is:
Figure BDA0003271055200000052
the second negative half cycle of the input alternating current power supply is in a negative half cycle in-phase output state: modality 7: switch S1b、S2b、S3a、S3bOn, switch S1a、S2aOff, Z source network in straight-throughState, capacitance C1、C2Discharge, inductance L1、L2And (6) charging. The modal duration is DTswAnd D<0.5; modality 8: switch S1b、S2b、S3aOn, switch S1a、S2a、S3bOff, capacitance C1、C2Charging, inductance L1、L2And (4) discharging. The modal duration is (1-D) Tsw. The ratio of the output voltage to the input voltage is:
Figure BDA0003271055200000053
different output voltage amplitudes can be obtained by adjusting the duty ratio D of the through state in each circuit state.
The capacitor discharge current in the reverse phase output state belongs to capacitor voltage balance current, so that dead time for safe current conversion is not added when the direct-connection state and the non-direct-connection state are switched; and only one switch in the same-phase output state is in a high-frequency switching state, so that the problem of safe current conversion does not exist, and dead time is not added in the switching process. Therefore, the alternating current-alternating current converter formed on the basis of the Z source structure has a safe current conversion characteristic, and the safe current conversion problem that capacitance voltage short circuit or inductance current open circuit is easy to generate in the switching process of the traditional alternating current-alternating current converter is avoided.
Example two:
referring to fig. 4(b), if the ac voltage output with the same frequency is to be realized, the output and the input are only required to be in phase, and the operation process of each circuit state is similar to that described in the first embodiment.
Example three:
referring to fig. 4(c), to realize the output of the ac voltage with 2 times of the frequency rise, it is only necessary to change the circuit state from the positive half cycle in-phase output to the positive half cycle inverted output at the time of 1/4 input line cycle, and change the circuit state from the negative half cycle inverted output to the negative half cycle in-phase output at the time of 3/4 line cycle, and the operation process of each circuit state is similar to that described in the first embodiment.
In summary, the single-phase Z-source boost type variable-frequency ac-ac converter provided by the invention can realize boost and variable-frequency ac voltage output, is simple to control, adopts fewer switching devices than the conventional ac-ac converter formed by bidirectional tubes, avoids the problem of safe commutation, and has the characteristics of high efficiency, light weight, high power density and the like.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A single-phase Z-source boost type variable frequency AC-AC converter is characterized by comprising an AC power supply, an input capacitor, a bidirectional switch, a Z-source network, a polarity switch unit, an output filter capacitor and a load; the Z source network comprises two input ends and two output ends; the polarity switch unit comprises two input ends and two output ends;
the bidirectional switch comprises a first switch S1aAnd a second switch S1b(ii) a The Z source network comprises a first energy storage inductor L1A second energy storage inductor L2A first energy storage capacitor C1And a second energy storage capacitor C2(ii) a The polarity switching unit includes a third switch S2aAnd a fourth switch S2bThe fifth switch S3aAnd a sixth switch S3bA first diode D1aA second diode D1bA third diode D2aA fourth diode D2bA fifth diode D3aAnd a sixth diode D3b(ii) a The input capacitor CinAn output filter capacitor CoA first energy storage capacitor C1And a second energy storage capacitor C2Are all non-polar capacitors.
2. The method of claim 1The single-phase Z-source boost type variable-frequency AC-AC converter is characterized in that the first switch S1aSource and second switch S1bAre connected.
3. The single-phase Z-source boost-type variable-frequency ac-ac converter according to claim 1, wherein the first energy-storage capacitor C1Is connected to the first energy storage inductor L1First terminal and second energy storage inductor L2A second end of (a); the second energy storage capacitor C2Is connected to the first energy storage inductor L1Second terminal and second energy storage inductor L2The first end of (a).
4. The single-phase Z-source boost-type variable-frequency ac-ac converter according to claim 1, wherein the first diode D1aAnode of and a second diode D1bThe anode of (2) is connected; the third switch S2aDrain and first diode D1aThe cathode of (a) is connected; the third diode D2aAnode and third switch S2aA source level connection of; the fifth switch S3aDrain and third diode D2aThe cathode of (a) is connected; the fifth diode D3aAnd a fifth switch S3aA source level connection of; the fifth diode D3aCathode and first diode D1aThe anode of (2) is connected; the fourth switch S2bAnd a second diode D1bThe cathode of (a) is connected; the fourth diode D2bAnode and fourth switch S2bA source level connection of; the sixth switch S3bDrain and fourth diode D2bThe cathode of (a) is connected; the sixth diode D3bAnd a sixth switch S3bA source level connection of; the sixth diode D3bCathode of and a second diode D1bIs connected with the anode of (2).
5. The single-phase Z-source boost-type variable-frequency ac-ac converter according to claim 1, wherein said input ac power source is connected to an input capacitor CinBoth ends of (a);the input capacitor CinAre connected to a first switch S1aAnd the second energy storage inductor L2Between the first ends of (a); the second switch S2aDrain and first energy storage inductor L1Is connected with the first end of the first connecting pipe; the first energy storage inductor L1Second terminal and first diode D1aThe cathode of (a) is connected; the second energy storage inductor L2Second terminal and second diode D1bThe cathode of (a) is connected; the output filter capacitor CoIs connected to a third diode D2aCathode of and a fourth diode D2bBetween the cathodes of (a).
6. The single-phase Z-source boost-type variable-frequency ac-ac converter according to claim 1, comprising four operating states, respectively: a positive half cycle in-phase output state, a positive half cycle reverse phase output state, a negative half cycle in-phase output state and a negative half cycle reverse phase output state;
order S1aRemains on, S1bRemains off, S2aRemains on, S2bRemains off, S3bRemains on, only S3aCarrying out high-frequency switching-on and switching-off, wherein the circuit is in a positive half cycle in-phase output state; order S1bRemains off, S2bRemains on, S3aRemains on, S3bRemains off, S1aAnd S2aPerforming high-frequency complementary on-off, wherein the circuit is in a positive half cycle inverted output state;
order S1aRemains off, S1bRemains on, S2aRemains off, S2bRemains on, S3aRemains on, only S3bCarrying out high-frequency switching on and off, wherein the circuit is in a negative half cycle in-phase output state; order S1aRemains off, S2aRemains on, S3aRemains off, S3bRemains on, S1bAnd S2bPerforming high-frequency complementary on-off, wherein the circuit is in a negative half cycle inverted output state;
in the four working states, the state that the output end of the Z source network is directly connected is called a through state, and the through state comprises a positive half cycleS in the in-phase output state3aMode of opening, S in positive half cycle inverted output state2aOpening, S1aOff mode, S in negative half cycle in-phase output state3bOn mode and S in negative half cycle inverted output state2bOpening, S1bA modality of shutdown;
the time duty ratio of the through state in one switching period is D, and the amplitude of the output voltage can be adjusted by adjusting the duty ratio D;
by changing the four operating states of the circuit at appropriate times during one cycle of the input voltage line, it is possible to realize the rise or fall of the fundamental frequency of the output voltage.
7. The single-phase Z-source boost-type variable-frequency ac-ac converter according to claim 6, wherein in the positive half-cycle in-phase output state, the ratio of the output voltage to the input voltage is:
Figure FDA0003271055190000021
when the negative half cycle is in the reverse phase output state, the ratio of the output voltage to the input voltage is as follows:
Figure FDA0003271055190000022
when the positive half cycle is in the reverse phase output state, the ratio of the output voltage to the input voltage is as follows:
Figure FDA0003271055190000023
when the negative half cycle is in the same phase output state, the ratio of the output voltage to the input voltage is as follows:
Figure FDA0003271055190000024
8. the single-phase Z-source boost-type variable-frequency ac-ac converter according to claim 1, wherein said first switch S1aA second switch S1bAnd a third switch S2aAnd a fourth switch S2bThe fifth switch S3aAnd a sixth switch S3bEach of which is composed of a fully-controlled device MOSFET.
CN202111102009.XA 2021-09-18 2021-09-18 Single-phase Z-source boost type variable-frequency alternating current-alternating current converter Active CN113824335B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111102009.XA CN113824335B (en) 2021-09-18 2021-09-18 Single-phase Z-source boost type variable-frequency alternating current-alternating current converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111102009.XA CN113824335B (en) 2021-09-18 2021-09-18 Single-phase Z-source boost type variable-frequency alternating current-alternating current converter

Publications (2)

Publication Number Publication Date
CN113824335A true CN113824335A (en) 2021-12-21
CN113824335B CN113824335B (en) 2023-11-07

Family

ID=78922670

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111102009.XA Active CN113824335B (en) 2021-09-18 2021-09-18 Single-phase Z-source boost type variable-frequency alternating current-alternating current converter

Country Status (1)

Country Link
CN (1) CN113824335B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104811066A (en) * 2014-01-24 2015-07-29 通用电气公司 System and method of power conversion
KR101681934B1 (en) * 2015-09-04 2016-12-02 경북대학교 산학협력단 A single-phase pwm ac-ac converter with inverting, non-inverting and matrix converter and control method thereof
CN106208726A (en) * 2016-07-14 2016-12-07 厦门大学 A kind of voltage-type Quasi Z Source AC AC changer
CN110768539A (en) * 2019-01-22 2020-02-07 邢台子中电子科技有限公司 AC-AC converter using IGBT or MOS tube and control method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104811066A (en) * 2014-01-24 2015-07-29 通用电气公司 System and method of power conversion
KR101681934B1 (en) * 2015-09-04 2016-12-02 경북대학교 산학협력단 A single-phase pwm ac-ac converter with inverting, non-inverting and matrix converter and control method thereof
CN106208726A (en) * 2016-07-14 2016-12-07 厦门大学 A kind of voltage-type Quasi Z Source AC AC changer
CN110768539A (en) * 2019-01-22 2020-02-07 邢台子中电子科技有限公司 AC-AC converter using IGBT or MOS tube and control method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HAFIZ FURQAN AHMED ET AL.: ""A Single-Phase Buck–Boost Matrix Converter With Only Six Switches and Without Commutation Problem"", 《 IEEE TRANSACTIONS ON POWER ELECTRONICS》, vol. 32, no. 2, pages 1232 - 1244, XP011634118, DOI: 10.1109/TPEL.2016.2553044 *

Also Published As

Publication number Publication date
CN113824335B (en) 2023-11-07

Similar Documents

Publication Publication Date Title
US10050552B2 (en) High-frequency isolation alternating/direct current conversion circuit and control method thereof
CN1074202C (en) Input harmonic current corrected AC- to DC converter with multiple coupled primary windings
CN104426408B (en) Translation circuit and be applied to translation circuit conversion electric power changing method
WO2012001828A1 (en) Dc-dc power conversion apparatus
US5831846A (en) Dual mode boost converter and method of operation thereof
US11569746B2 (en) DC coupled electrical converter
CN101997429B (en) Global-type switching power supply and serial-parallel direct-current power switching circuit thereof
CN109842182B (en) Power supply system
CN107147303B (en) Single-phase X-shaped staggered three-level alternating current voltage regulating circuit
KR20190115364A (en) Single and three phase combined charger
CN112350583A (en) Current type push-pull bridge type soft switching bidirectional direct current converter
CN113824335A (en) Single-phase Z-source boosting type variable-frequency AC-AC converter
CN113489330B (en) Efficiency optimal modal control method of modular rectification structure resonant converter
CN209767394U (en) self-following flying capacitor five-level AC-AC converter
JP2014150706A (en) DC/AC conversion system
CN110729913B (en) Single-stage high-gain five-switch Boost type inverter
US8971078B2 (en) DC/AC inverter switch controller
CN113890384A (en) Single-phase Cuk frequency conversion AC-AC converter
RU2388136C2 (en) Method for control of power and design of resistance converter for ac electric machines
CN210111864U (en) Four-level AC-AC converter and any integer level AC-AC converter obtained by expanding four-level AC-AC converter
KR102456452B1 (en) Power converting device with active power decoupling operation
Takuma et al. Surge Voltage Reduction Method for DAB Matrix Converter using Circulating Current in Whole Load Condition
CN103840686A (en) High-efficiency power supply converter with integrated functions of PFC and DC conversion
CN213027834U (en) Positive and negative independent chopping control type sine wave electronic voltage regulator
US11894765B2 (en) Power conversion device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant