CN109921676A - Converter topology unit and converter device - Google Patents
Converter topology unit and converter device Download PDFInfo
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- CN109921676A CN109921676A CN201910159527.1A CN201910159527A CN109921676A CN 109921676 A CN109921676 A CN 109921676A CN 201910159527 A CN201910159527 A CN 201910159527A CN 109921676 A CN109921676 A CN 109921676A
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- 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
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- 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
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Abstract
This application involves a kind of converter topology unit and converter devices.Converter topology unit includes first capacitor, the second capacitor, first switch device, second switch device, first resistor and single-phase bridge arm circuit, wherein single-phase bridge arm circuit includes third switching device, the 4th switching device, the 5th switching device, the 6th switching device, the 7th switching device, the 8th switching device, the 9th switching device, the tenth switching device, third capacitor, first diode and the second diode.Above-mentioned converter topology unit and converter device may be at that shutdown status, AC power source charge to three capacitor chargings, AC power source to first capacitor, AC power source is to the second capacitor charging and standby mode; so that third capacitance voltage reaches setting value prior to the voltage of the first and second capacitors; the voltage stress when voltage stress for each switching device for controlling three capacitor charging voltage being made to be not higher than normal operation; extend the service life of each switching device, improves reliability.
Description
Technical field
This application involves power electronics fields, more particularly to a kind of converter topology unit and converter device.
Background technique
Two-way AC/DC convertor is a kind of direct current energy is converted into AC energy or is converted into AC energy directly
The converter of galvanic electricity energy.Increasingly increase with progress, demand of the mankind to the energy with the continuous development of society, photovoltaic, energy storage etc.
New energy is also increasing in energy specific gravity accounting.As its core, photovoltaic DC converter and energy accumulation current converter are in recent years
It is also more and more fierce in market competition.In order to meet the market demand, more and more more level AC/DC convertors are pushed into market.
The voltage stress of the main switch in normal operation of more level AC/DC convertors currently on the market is big, is running
The voltage stress in preceding several periods will be approximately equal to busbar voltage, main switch probably due to overtension and puncture, make
Short with the service life, reliability is low.
Summary of the invention
Based on this, it is necessary to for the low problem of traditional more level AC/DC convertor reliabilities, provide a kind of unsteady flow
Device topology unit and converter device.
A kind of converter topology unit, including first capacitor, the second capacitor, first switch device, second switch device, the
One resistance and single-phase bridge arm circuit, the single-phase bridge arm circuit include third switching device, the 4th switching device, the 5th derailing switch
Part, the 6th switching device, the 7th switching device, the 8th switching device, the 9th switching device, the tenth switching device, third capacitor,
First diode and the second diode；
Wherein, the first capacitor, the 7th switching device, the third switching device, the 4th switching device,
9th switching device and second capacitor are sequentially connected, in the circuit between the first capacitor and second capacitor
Point is used as the first connecting pin, and the third switching device is used as with the public connecting end of the 4th switching device and exchanges end, institute
The public connecting end of the 7th switching device and the third switching device is stated as second connection end, the 4th switching device and
The public connecting end of 9th switching device is as third connecting pin, third capacitor one end connection second connection
End, the other end connect the third connecting pin；
6th switching device connects the 8th switching device, the 6th switching device and the 8th derailing switch
The public connecting end of part connects the cathode of the first diode, the anode connection of the first diode first connection
End, the anode of the first diode are the input terminal of the single-phase bridge arm circuit, and the 6th switching device is not connected described
One end of 8th switching device connects the second connection end, and the 8th switching device is not connected with the 6th switching device
One end connects the third connecting pin；
Tenth switching device connects the 5th switching device, the tenth switching device and the 5th derailing switch
The public connecting end of part connects the anode of second diode, the cathode connection of second diode first connection
End, one end that the tenth switching device is not connected with the 5th switching device connect the second connection end, and the described 5th opens
Close one end connection third connecting pin that device is not connected with the tenth switching device；
The second switch device connects the first resistor, and the second switch device is not connected with the first resistor
One end connects the exchange end, and the first resistor is not connected with one end connection AC power source of the second switch device, described
Second switch device one end connects the exchange end, and the other end connects the AC power source；
The converter topology cell operation in five operation modes, respectively the first operation mode, the second operation mode,
Third operation mode, the 4th operation mode and the 5th operation mode, when the converter topology cell operation is in first work
When making mode, the converter topology unit is in shutdown status；When the converter topology cell operation is in the second Working mould
When state, the AC power source gives the first capacitor, second capacitor and the third capacitor charging；When the current transformer is opened up
Cell operation is flutterred in the third operation mode, the AC power source charges to the first capacitor；When the current transformer is opened up
Cell operation is flutterred in four operation mode, the AC power source gives second capacitor charging；When the current transformer is opened up
Cell operation is flutterred in five operation mode, the converter topology unit is in standby.
The first switch device and second switch device cut-off in one of the embodiments, so that the change
The work of device topology unit is flowed in first operation mode；
The second switch device, the 7th switching device and the 9th switch device conductive, other switching devices
Cut-off, so that the converter topology cell operation is in second operation mode；
The second switch device and the 8th switch device conductive, other switching devices cut-off, so that the unsteady flow
Device topology unit works in the third operation mode；
The second switch device and the tenth switch device conductive, other switching devices cut-off, so that the unsteady flow
Device topology unit works in the 4th operation mode；
The first switch break-over of device, other switching devices cut-off, so that the converter topology cell operation is in institute
State the 5th operation mode.
In one of the embodiments, converter topology unit further include the 11st switching device, the 12nd switching device,
13rd switching device, the 14th switching device, second resistance and 3rd resistor, the AC power source include the first phase alternating current
Source, the second phase AC power source and third phase AC power source, the single-phase bridge arm circuit include the first single-phase bridge arm circuit, the second list
Phase bridge arm circuit and the single-phase bridge arm circuit of third；
Wherein, the second switch device connects the first resistor, and the second switch device is not connected with described first
One end of resistance connects the exchange end of the described first single-phase bridge arm circuit, and the first resistor is not connected with the second switch device
One end connect the first phase AC power source, second switch device one end connects the friendship of the described first single-phase bridge arm circuit
End is flowed, the other end connects the first phase AC power source；
12nd switching device connects the second resistance, and the 12nd switching device is not connected with second electricity
One end of resistance connects the exchange end of the described second single-phase bridge arm circuit, and the second resistance is not connected with the 12nd switching device
One end connect the second phase AC power source, described 11st switching device one end connects the described second single-phase bridge arm circuit
End is exchanged, the other end connects the second phase AC power source；
14th switching device connects the 3rd resistor, and the 14th switching device is not connected with the third electricity
One end of resistance connects the exchange end of the single-phase bridge arm circuit of the third, and the 3rd resistor is not connected with the 14th switching device
One end connect the third phase AC power source, described 13rd switching device one end connects the single-phase bridge arm circuit of the third
End is exchanged, the other end connects the third phase AC power source, the first single-phase bridge arm circuit, the second single-phase bridge arm circuit
First connecting pin is all connected with the input terminal of the single-phase bridge arm circuit of the third.
Converter topology unit further includes exchange side filter circuit in one of the embodiments, the exchange side filtering
The input terminal of circuit connects the exchange end, and the output end of the exchange side filter circuit connects the AC power source.
Exchange side filter circuit includes inductance in one of the embodiments, and described inductance one end connects the friendship
End is flowed, the other end connects the AC power source.
The third switching device, the 4th switching device, the 5th derailing switch in one of the embodiments,
Part, the 6th switching device, the 7th switching device, the 8th switching device, the 9th switching device and described
Tenth switching device is switching tube.
The 5th switching device and the 6th switching device are inverse-impedance type switch in one of the embodiments,
Pipe, the third switching device, the 4th switching device, the 7th switching device and the 9th switching device it is anti-simultaneously
Join a diode.
A kind of converter device, comprising:
Above-mentioned converter topology unit；
Control unit is separately connected with each switching device, controls the unsteady flow for control signal based on the received
The on state or off state of each switching device in device topology unit, so that converter device work works accordingly
Mode.
The control signal of described control unit includes first voltage signal, second voltage letter in one of the embodiments,
Number and tertiary voltage signal；
Value of the described control unit in the first voltage signal, the second voltage signal and the tertiary voltage signal
The first switch device and second switch device cut-off are controlled when being zero；
Described control unit controls the second switch device, institute when the value of the tertiary voltage signal is less than setting value
The 7th switching device and the 9th switch device conductive are stated, the cut-off of other switching devices；
Described control unit controls the second switch device when the value of the tertiary voltage signal reaches the setting value
Part and the 8th switch device conductive, the cut-off of other switching devices；
Described control unit controls described second when the value of the first voltage signal reaches twice of the setting value
Switching device and the tenth switch device conductive, the cut-off of other switching devices；
Described control unit controls described first when the value of the second voltage signal reaches twice of the setting value
Switch device conductive, the cut-off of other switching devices；The setting value is a quarter of bus voltage value.
The first voltage signal is the voltage value of the first capacitor in one of the embodiments, second electricity
Pressing signal is the voltage value of second capacitor, and the tertiary voltage signal is the voltage value of the third capacitor.
Above-mentioned converter topology unit and converter device, converter topology cell operation is in five operation modes, respectively
For the first operation mode, the second operation mode, third operation mode, the 4th operation mode and the 5th operation mode, work as current transformer
Topology unit works in the first operation mode, and converter topology unit is in shutdown status；When converter topology cell operation
In the second operation mode, AC power source is to first capacitor, the second capacitor and third capacitor charging；When converter topology unit work
Make in third operation mode, AC power source charges to first capacitor；When converter topology cell operation is in the 4th operation mode
When, AC power source gives the second capacitor charging；When converter topology cell operation is in five operation modes, converter topology unit
It is in standby, this makes the voltage first of third capacitor reach setting value in the voltage of first capacitor and the second capacitor, makes
The voltage stress when voltage stress of each switching device of three capacitor charging voltages is not higher than normal operation is controlled, is extended
The service life of each switching device, improves the reliability of converter topology unit and converter device.
Detailed description of the invention
Fig. 1 is the structure chart of converter topology unit in one embodiment；
Fig. 2 is the structure chart of converter topology unit in another embodiment；
Fig. 3 is the equivalent circuit diagram of converter topology unit in one embodiment；
Fig. 4 is the equivalent circuit diagram of converter topology unit in another embodiment；
Fig. 5 is the equivalent circuit diagram of converter topology unit in another embodiment；
Fig. 6 is the equivalent circuit diagram of converter topology unit in another embodiment；
Fig. 7 is the structure chart of converter topology unit in another embodiment；
Fig. 8 is the flow chart of the soft-start method of converter topology unit in one embodiment；
Fig. 9 is the waveform diagram of the control pulse sequence and capacitance voltage in one embodiment in soft start-up process.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached
Figure, is described more fully the present invention.It should be appreciated that specific embodiment described herein is only to explain this hair
It is bright, it is not intended to limit the present invention.
In one embodiment, referring to Figure 1, a kind of converter topology unit is provided, which includes:
First capacitor Cup, the second capacitor Cdown, first switch device K1, second switch device K4, first resistor R1 and single-phase bridge arm
Circuit, single-phase bridge arm circuit include third switching device S1, the 4th switching device S2, the 5th switching device S3, the 6th derailing switch
Part S4, the 7th switching device S5, the 8th switching device S6, the 9th switching device S7, the tenth switching device S8, third capacitor Cf,
First diode D1 and the second diode D2；
The connection relationship of each device is as follows in converter topology unit: first capacitor Cup, the 7th switching device S5,
Three switching device S1, the 4th switching device S2, the 9th switching device S7 and the second capacitor Cdown are sequentially connected, first capacitor Cup
Circuit midpoint between the second capacitor Cdown as the first connecting pin, third switching device S1 and the 4th switching device S2's
Public connecting end is connect with the public connecting end of third switching device S1 as second as exchange end, the 7th switching device S5
The public connecting end of end, the 4th switching device S2 and the 9th switching device S7 connect as third connecting pin, third one end capacitor Cf
Second connection end is connect, the other end connects third connecting pin；
The 8th switching device S6 of 6th switching device S4 connection, the 6th switching device S4 and the 8th switching device S6's is public
Connecting pin connects the cathode of first diode D1, and the anode of first diode D1 connects the first connecting pin, first diode D1's
Anode is the input terminal of single-phase bridge arm circuit, and one end connection second that the 6th switching device S4 is not connected with the 8th switching device S6 connects
End is connect, one end that the 8th switching device S6 is not connected with the 6th switching device S4 connects third connecting pin；
The 5th switching device S3 of tenth switching device S8 connection, the tenth switching device S8 and the 5th switching device S3's is public
Connecting pin connects the anode of the second diode D2, and the cathode of the second diode D2 connects the first connecting pin, the tenth switching device S8
One end of not connected 5th switching device S3 connects second connection end, and the 5th switching device S3 is not connected with the tenth switching device S8's
One end connects third connecting pin；
The K4 connection of second switch device first resistor R1, second switch device K4 are not connected with one end connection of first resistor R1
End is exchanged, one end that first resistor R1 is not connected with second switch device K4 connects AC power source Us, the one end second switch device K4
Connection exchange end, the other end connect AC power source Us；
Converter topology cell operation is in five operation modes, respectively the first operation mode, the second operation mode, third
Operation mode, the 4th operation mode and the 5th operation mode, when converter topology cell operation is in the first operation mode, unsteady flow
Device topology unit is in shutdown status；When converter topology cell operation is in the second operation mode, AC power source Us gives first
Capacitor Cup, the second capacitor Cdown and third capacitor Cf charging；When converter topology cell operation is in third operation mode, hand over
Galvanic electricity source Us charges to first capacitor Cup；When converter topology cell operation is in four operation modes, AC power source Us is to the
Two capacitor Cdown charging；When converter topology cell operation is in five operation modes, converter topology unit is in standby shape
State.
Specifically, single-phase bridge arm circuit include third switching device S1, the 4th switching device S2, the 5th switching device S3,
6th switching device S4, the 7th switching device S5, the 8th switching device S6, the 9th switching device S7, the tenth switching device S8,
Three capacitor Cf, first diode D1 and the second diode D2, in the present embodiment, converter topology unit include a single-phase bridge
Arm circuit, therefore novel Five-level converter can be obtained when there is multiple single-phase bridge arm circuits to be connected for single-phase converter.One
As for, in converter topology unit, first capacitor Cup be Up Highway UHW capacitor, the second capacitor Cdown be Down Highway capacitor,
Third capacitor Cf be flying capacitor, single-phase bridge arm circuit three ends input respectively with the upper end of Up Highway UHW capacitor, Up Highway UHW capacitor
Lower end, that is, Down Highway capacitor upper end, Down Highway capacitor lower end be connected, the output end of converter topology unit is opened for third
The public connecting end of device S1 and the 4th switching device S2 are closed, output end connection AC power source Us, converter topology unit can be with
The electric energy exported using AC power source Us is to the capacitor charging in topology unit, so that converter topology unit works normally, it can
Extension ground, output end can also connect AC network or load, for will convert obtained exchange electricity output best friend's galvanic electricity net or
Load is for its use.First resistor R1 is usually current-limiting resistance, is connect with second switch device K4, for the electricity in limiting circuit
Size is flowed, the safety of converter topology unit is ensured, improves its reliability.
Above-mentioned converter topology unit, converter topology cell operation is in five operation modes, respectively the first Working mould
State, the second operation mode, third operation mode, the 4th operation mode and the 5th operation mode, when converter topology cell operation
In the first operation mode, converter topology unit is in shutdown status；When converter topology cell operation is in the second Working mould
When state, AC power source Us charges to first capacitor Cup, the second capacitor Cdown and third capacitor Cf；When converter topology unit work
Make in third operation mode, AC power source Us charges to first capacitor Cup；When converter topology cell operation is in the 4th work
When mode, AC power source Us charges to the second capacitor Cdown；When converter topology cell operation is in five operation modes, become
Stream device topology unit is in standby, this makes the voltage first of third capacitor Cf in first capacitor Cup and the second capacitor
The voltage of Cdown reaches setting value, is not higher than the voltage stress for each switching device for controlling three capacitor charging voltage
Voltage stress when normal operation extends the service life of each switching device, improves converter topology unit and current transformer
The reliability of device.
In one embodiment, converter topology unit can be controlled by the on or off state of each switching device
Operation mode, the relationship of specific switch combination and corresponding operation mode is as follows:
First switch device K1 and second switch device K4 cut-off, so that converter topology cell operation is in the first Working mould
State, when converter topology cell operation is in the first operation mode, converter topology unit is in shutdown status.
Specifically, when first switch device K1 and second switch device K4 ends, the electric energy in AC power source Us can not be passed
In the defeated circuit being attached thereto to its left side, right side circuit breaker, converter topology unit does not work, and is in shutdown status, this
When first capacitor Cup, the second capacitor Cdown and the voltage value of third capacitor Cf be zero, in this case, third derailing switch
Part S1, the 4th switching device S2, the 5th switching device S3, the 6th switching device S4, the 7th switching device S5, the 8th switching device
S6, the 9th switching device S7 and the tenth switching device S8 can be in off state, to improve the peace of converter topology unit
Quan Xing, it will be understood that in other embodiments, these switching devices also may be at partially ON or all turn on state, no
The shutdown status of converter topology unit can be impacted.
Second switch device K4, the 7th switching device S5 and the 9th switching device S7 conducting, the cut-off of other switching devices, with
Make converter topology cell operation in the second operation mode, when converter topology cell operation is in the second operation mode, exchange
Power supply Us charges to first capacitor Cup, the second capacitor Cdown and third capacitor Cf, is opened by the 7th switching device S5 and the 9th
It closes the two main switching devices of device S7 third capacitor Cf, first capacitor Cup is in parallel with the second capacitor Cdown, makes the first electricity
Converter topology unit can be improved simultaneously by exchanging side power source charges with third capacitor Cf by holding Cup, the second capacitor Cdown
Charge efficiency, optimize its service performance.
Second switch device K4 and the 8th switching device S6 conducting, other switching devices cut-off, so that converter topology list
Member work is in third operation mode, and when converter topology cell operation is in third operation mode, AC power source Us is to the first electricity
Hold Cup charging.Specifically, it when the voltage value of third capacitor Cf reaches setting value, disconnects the 7th switching device S5 and the 9th and opens
Device S7 is closed, and is closed the 8th switching device S6, is charged by first resistor R1 to first capacitor Cup by AC power source Us, the
One resistance R1 damages component for avoiding charging current excessive, and the specific value of setting value is not unique, in this implementation
It can be a quarter of total busbar voltage setting value in example.
Second switch device K4 and the tenth switching device S8 conducting, other switching devices cut-off, so that converter topology list
Member work is in the 4th operation mode, and when converter topology cell operation is in four operation modes, AC power source Us is to the second electricity
Hold Cdown charging.Specifically, when the voltage value of first capacitor Cup reaches twice of setting value, the 8th switching device is disconnected
S6, and it is closed the tenth switching device S8, it is charged by first resistor R1 to first capacitor Cup by AC power source Us, first resistor
R1 damages component for avoiding charging current excessive, and the specific value of setting value is not unique, sets in the present embodiment
Definite value can be a quarter of total busbar voltage setting value, i.e., set when the voltage value of first capacitor Cup reaches total busbar voltage
When the half of definite value, the 8th switching device S6 is disconnected, and be closed the tenth switching device S8, passes through first by AC power source Us
Resistance R1 charges to first capacitor Cup.By the 7th switching device S5, the 8th switching device S6, the 9th switching device S7 and the tenth
The a part of switching device S8 as soft start remains the complete independence of every phase bridge arm, realizes that third capacitor Cf voltage is excellent
Reach its setting value prior to first capacitor Cup and the second capacitor Cdown, guarantees that the voltage stress of each switching device when soft start is equal
Not higher than voltage stress when operating normally, safe and reliable efficient soft start is realized.
First switch device K1 conducting, other switching devices cut-off, so that converter topology cell operation is in the 5th work
Mode, when converter topology cell operation is in five operation modes, converter topology unit is in standby.Specifically,
First switch device K1 is connected, and pressure is built in the capacitor completion in converter topology unit, and converter topology unit is in standby mode.
It expansiblely, can be by controlling third switching device S1, the 4th switching device S2, the 5th after first switch device K1 conducting
Switching device S3, the 6th switching device S4, the 7th switching device S5, the 8th switching device S6, the 9th switching device S7 and the tenth
The on or off state of each switching device such as switching device S8 come make converter topology unit export five kinds of level, for example,
When third switching device S1, the 6th switching device S4 and the tenth switching device S8 conducting, other switching devices cut-off or the 4th
Switching device S2, the 5th switching device S3 and the 7th switching device S5 conducting, when other switching devices end, converter topology list
The level of member exchange end output is 0.When the 4th switching device S2 and the 7th switching device S5 is connected, other switching devices end,
Or third switching device S1, the 5th switching device S3 and the 8th switching device S6 are connected, and when other switching devices end, unsteady flow
The level that device topology unit exchanges end output is equal to the load voltage value of third capacitor Cf.When third switching device S1 and the 7th is opened
Device S5 conducting is closed, when other switching devices end, the level that converter topology unit exchanges end output is equal to first capacitor Cup
Load voltage value.When the 4th switching device S2, the 6th switching device S4 and the tenth switching device S8 conducting, other switching devices
Cut-off or third switching device S1 and the 9th switching device S7 conducting, when other switching devices end, converter topology unit
The opposite number for the load voltage value that the level for exchanging end output is third capacitor Cf.When the 4th switching device S2 and the 9th derailing switch
Part S7 conducting, when other switching devices end, the level that converter topology unit exchanges end output is the specified of first capacitor Cup
The opposite number of voltage value, by the turn-on and turn-off of eight switching devices, different Switch State Combination in Power Systems can export altogether five
Kind level, it is easy to use.
In one embodiment, Fig. 2 is referred to, converter topology unit further includes the 11st switching device K2, the 12nd
Switching device K5, the 13rd switching device K3, the 14th switching device K6, second resistance R2 and 3rd resistor R3, AC power source
Us includes the first phase AC power source Usa, the second phase AC power source Usb and third phase AC power source Usc, single-phase bridge arm circuit include
First single-phase bridge arm circuit, the second single-phase bridge arm circuit and the single-phase bridge arm circuit of third.
Wherein, second switch device K4 connection first resistor R1, second switch device K4 are not connected with the one of first resistor R1
The exchange end of the first single-phase bridge arm circuit of end connection, one end that first resistor R1 is not connected with second switch device K4 connect the first phase
AC power source Usa, second switch one end device K4 connect the exchange end of the first single-phase bridge arm circuit, the first intersection of other end connection
Galvanic electricity source Usa.
12nd switching device K5 connection second resistance R2, the 12nd switching device K5 is not connected with one end of second resistance R2
The exchange end of the second single-phase bridge arm circuit is connected, one end that second resistance R2 is not connected with the 12nd switching device K5 connects the second phase
AC power source Usb, the 11st one end switching device K2 connect the exchange end of the second single-phase bridge arm circuit, and the other end connects the second phase
AC power source Usb.
14th switching device K6 connection 3rd resistor R3, the 14th switching device K6 is not connected with one end of 3rd resistor R3
The exchange end of the single-phase bridge arm circuit of third is connected, one end that 3rd resistor R3 is not connected with the 14th switching device K6 connects third phase
AC power source Usc, the 13rd one end switching device K3 connect the exchange end of the single-phase bridge arm circuit of third, and the other end connects third phase
AC power source Usc, the input terminal of the first single-phase bridge arm circuit, the second single-phase bridge arm circuit and the single-phase bridge arm circuit of third are all connected with
First connecting pin.
Specifically, when AC power source Us includes that the first phase AC power source Usa, the second phase AC power source Usb and third intersect
When the Usc of galvanic electricity source, the first phase AC power source Usa, the second phase AC power source Usb and third phase AC power source Usc use star-like company
The mode connect, there is connection common end, and the first phase AC power source Usa is not connected with one end connection first of the second phase AC power source Usb
First resistor R1 can provide electric energy to the first single-phase bridge arm circuit by first resistor R1, and the second phase AC power source Usb does not connect
One end connection second resistance R2 for meeting the first phase AC power source Usa, can give the second single-phase bridge arm circuit by second resistance R2
Electric energy is provided, one end that third phase AC power source Usc is not connected with the first phase AC power source Usa connects 3rd resistor R3, Ke Yitong
It crosses 3rd resistor R3 and provides electric energy to the single-phase bridge arm circuit of third.First single-phase bridge arm circuit, the second single-phase bridge arm circuit and
The circuit structure of three single-phase bridge arm circuits is identical, connect with three-phase alternating-current supply Us, may be constructed three-phase three-wire system or three-phase
The inverter circuit of five level of four-wire system, has a wide range of application, easy to use.
Fig. 2, first switch device K1 and second switch device K4 cut-off are referred to, so that converter topology cell operation exists
First operation mode, specifically, switching device K1, K2, K3, K4, K5, K6 disconnect, and converter topology unit, which is in, shuts down shape
State.Fig. 3 is referred to, second switch device K4, the 7th switching device S5 and the 9th switching device S7 conducting, other switching devices are cut
Only, so that converter topology cell operation is in the second operation mode, specifically, switching device K4, K5, K6, Sa5, Sb5, Sc5,
Sa7, Sb7, Sc7 conducting, the cut-off of other switching devices, AC power source Usa, Usb, Usc are to capacitor Cup, capacitor Cdown, capacitor
Cfa, capacitor Cfb and capacitor Cfc charging.Fig. 4, second switch device K4 and the 8th switching device S6 conducting are referred to, other are opened
Close device cut-off so that converter topology cell operation is in third operation mode, specifically, switching device K4, K5, K6, Sa6,
Sb6, Sc6 conducting, the cut-off of other switching devices, AC power source Usa, Usb, Usc charge to capacitor Cup.Refer to Fig. 5, second
Switching device K4 and the tenth switching device S8 conducting, other switching devices cut-off, so that converter topology cell operation is the 4th
Operation mode, specifically, switching device K4, K5, K6, Sa8, Sb8, Sc8 conducting, the cut-off of other switching devices, AC power source
Usa, Usb, Usc charge to capacitor Cdown.Fig. 6, first switch device K1 conducting are referred to, other switching devices end, so that
Converter topology cell operation is in the 5th operation mode, and specifically, switching device K1, K2, K3 conducting, other switching devices are cut
Only, converter topology unit is in standby.
Expansiblely, the structure of converter topology unit is not unique, please participate in Fig. 7, compared with above-described embodiment,
In one embodiment, converter topology unit does not include 3rd resistor R3 and the 13rd switching device K3, the 14th derailing switch
The one end part K6 connects the exchange end of the single-phase bridge arm circuit of third, and the other end connects third phase AC power source Usc, the first single-phase bridge arm
The input terminal of circuit, the second single-phase bridge arm circuit and the single-phase bridge arm circuit of third is all connected with the first connecting pin.The circuit structure compared with
To be simple, the cost of circuit, but the function that circuit structure is realized in the function of circuit realization and above-described embodiment can be saved
Similar, details are not described herein.
In one embodiment, converter topology unit further includes exchange side filter circuit, exchanges the defeated of side filter circuit
Enter end connection exchange end, the output end of exchange side filter circuit connects AC power source Us.Exchanging side filter circuit can be to unsteady flow
Voltage between device topology unit and AC power source Us is filtered, and improves the working performance of converter topology unit.Tool
Body, the structure of exchange side filter circuit are not unique, such as may include inductively or capacitively, or by capacitor and inductance
The various compound filter circuits of composition, as long as those skilled in the art think that the function of filtering may be implemented.
In one embodiment, referring to Figure 1, exchange side filter circuit includes inductance L, and the connection of the one end inductance L exchanges end,
The other end connects AC power source Us.Inductance L is arranged between the exchange end and AC power source Us of converter topology unit can be right
Voltage between converter topology unit and AC power source Us is filtered, and improves the workability of converter topology unit
Can, and structure is simple, is conducive to the cost for saving converter topology unit.
Specifically, the quantity of inductance L is not unique, as long as can be realized the function of filtering.For example, referring to
Fig. 2, when AC power source Us includes the first phase AC power source Usa, the second phase AC power source Usb and third phase AC power source Usc, list
When phase bridge arm circuit includes the first single-phase bridge arm circuit, the second single-phase bridge arm circuit and third single-phase bridge arm circuit, inductance L includes
First inductance L1, the second inductance L2 and third inductance L3, first one end inductance L1 connect first resistor R1, other end connection first
Phase AC power source Usa, second one end inductance L2 connect second resistance R2, and the other end connects the second phase AC power source Usb, third electricity
Feel the one end L3 and connect 3rd resistor R3, the other end connects third phase AC power source Usc, realizes the filter to three single-phase bridge arm circuits
Wave energy improves the reliability of converter topology unit.
In one embodiment, third switching device S1, the 4th switching device S2, the 5th switching device S3, the 6th switch
Device S4, the 7th switching device S5, the 8th switching device S6, the 9th switching device S7 and the tenth switching device S8 are switch
Pipe.Switching tube can flexibly switch the working condition of the on or off of switching device as switching device, be conducive to improve change
Flow the working efficiency and reliability of device topology unit.
Specifically, when third switching device S1, the 4th switching device S2, the 5th switching device S3, the 6th switching device S4,
When 7th switching device S5, the 8th switching device S6, the 9th switching device S7 and the tenth switching device S8 are switching tube, these
Switching device includes control terminal, first end and second end, control terminal can be used for receiving signal, and switching device is according to receiving
The on or off state of Signal-controlled switch device is controlled, high degree of automation is easy to use.First switch device K1 and
Two switching device K4 can be common single-pole double-throw switch (SPDT), and structure is simple, and use cost is low.In converter topology unit
Circuit connecting relation is as follows:
First capacitor Cup, the 7th switching device S5, third switching device S1, the 4th switching device S2, the 9th switching device
S7 and the second capacitor Cdown are sequentially connected, and the circuit midpoint between first capacitor Cup and the second capacitor Cdown connects as first
End is connect, the second end of third switching device S1 is used as with the public connecting end of the first end of the 4th switching device S2 exchanges end, the
The public connecting end of the first end of the second end and third switching device S1 of seven switching device S5 is opened as second connection end, the 4th
The public connecting end of the second end of device S2 and the first end of the 9th switching device S7 is closed as third connecting pin, third capacitor Cf
One end connect second connection end, the other end connect third connecting pin.
The first end of the 8th switching device S6 of first end connection of 6th switching device S4, the first of the 6th switching device S4
End connect the cathode of first diode D1, the sun of first diode D1 with the public connecting end of the first end of the 8th switching device S6
Pole connects the first connecting pin, and the anode of first diode D1 is the input terminal of single-phase bridge arm circuit, and the of the 6th switching device S4
Two ends connect second connection end, and the second end of the 8th switching device S6 connects third connecting pin.
The second end of the 5th switching device S3 of second end connection of tenth switching device S8, the second of the tenth switching device S8
End connect the anode of the second diode D2, the yin of the second diode D2 with the public connecting end of the second end of the 5th switching device S3
Pole connects the first connecting pin, and the first end of the tenth switching device S8 connects second connection end, the first end of the 5th switching device S3
Connect third connecting pin.
The K4 connection of second switch device first resistor R1, second switch device K4 are not connected with one end connection of first resistor R1
End is exchanged, one end that first resistor R1 is not connected with second switch device K4 connects AC power source Us, the one end second switch device K4
Connection exchange end, the other end connect AC power source Us.
For the converter topology unit using AC power source Us to the capacitor charging in current transformer, structure is simple, easy to control,
Increased auxiliary branch is less, and safe and reliable efficient soft start may be implemented.It is appreciated that in other embodiments, switch
Device is also possible to the switch other than switching tube, such as optoelectronic switch etc., as long as can be realized the conducting and disconnection of circuit.
In one embodiment, the 5th switching device S3 and the 6th switching device S4 is inverse-impedance type switching tube, and third is opened
Close device S1, the 4th switching device S2, the 7th switching device S5 and the 9th switching device S7 one diode of equal inverse parallel.
Specifically, inverse-impedance type switching tube does not have on-off action to negative anode voltage, reverse blocking state is only presented, to switch
The transient parameters such as time do not specially require, and are mainly used for the reverse blocking of power frequency.Inverse-impedance type switching tube is unidirectionally led in addition to having
Except electrical characteristics, also with the controllable characteristics of forward conduction, to element, whether forward conduction plays control action to gate pole, can pass through door
The on or off state of pole tension control switch pipe, high reliablity.In addition, third switching device S1 and third diode D3 are anti-
It is reversed in parallel, the 4th switching device S2 and the 4th diode D4 reverse parallel connection, the 7th switching device S5 and the 5th diode D5
Parallel connection, the 9th switching device S7 and the 6th diode D6 reverse parallel connection, when third switching device S1, the 4th switching device S2,
When seven switching device S5 and the 9th switching device S7 are switching tube, the cathode and switch of the antiparallel diode of these switching tubes
The first end of pipe connects, and the anode of antiparallel diode and the second end of switching tube connect.In third switching device S1, the 4th
One diode of inverse parallel can increase each switching device at switching device S2, the 7th switching device S5 and the 9th switching device S7
The current direction at place enriches the function of converter topology unit, improves its reliability.
In one embodiment, a kind of converter device, including control unit and above-mentioned converter topology unit are provided.Control
Unit processed is separately connected with each switching device, for each derailing switch in control signal control converter topology unit based on the received
The on state or off state of part, so that converter topology cell operation is in corresponding operation mode.
Specifically, control signal be the on or off state of switching device in converter topology unit of controlling according to
According to the conducting combination of different switching devices can determine circuit structure and current direction, to influence converter topology unit
In the charged state of each capacitor and the size of output voltage values.Control signal can be set on or off signal,
Can be according to the comparison results of several signals to determine switching device on or off state control signal, can basis
Actual demand determines.As third switching device S1, the 4th switching device S2, the 5th switching device in converter topology unit
S3, the 6th switching device S4, the 7th switching device S5, the 8th switching device S6, the 9th switching device S7 and the tenth switching device
When S8 is switching tube, control unit connects the control terminal of these switching tubes, and control unit sends a control signal to each switching tube,
Signal is controlled by the on or off state of the control terminal control switch pipe of these switching tubes, so that converter topology unit work
Make in corresponding operation mode.
In one embodiment, the control signal of control unit includes first voltage signal, second voltage signal and third
Voltage signal, control unit control when the value of first voltage signal, second voltage signal and tertiary voltage signal is zero
One switching device K1 and second switch device K4 cut-off, control unit control the when the value of tertiary voltage signal is less than setting value
Two switching device K4, the 7th switching device S5 and the 9th switching device S7 conducting, the cut-off of other switching devices, control unit is the
Control second switch device K4 and the 8th switching device S6 conducting, other switching devices when the value of three voltage signals reaches setting value
Cut-off, control unit control the switch of second switch device K4 and the tenth when the value of first voltage signal reaches twice of setting value
Device S8 conducting, the cut-off of other switching devices, control unit control when the value of second voltage signal reaches twice of setting value
First switch device K1 conducting, the cut-off of other switching devices, setting value are a quarter of bus voltage value.
Specifically, control unit is when the value of first voltage signal, second voltage signal and tertiary voltage signal is zero
First switch device K1 and second switch device K4 cut-off is controlled, converter topology unit is in shutdown status at this time.Control is single
Member control second switch device K4, the 7th switching device S5 and the 9th derailing switch when the value of tertiary voltage signal is less than setting value
Part S7 conducting, the cut-off of other switching devices, AC power source Us is by current-limiting resistance to first capacitor Cup, the second capacitor at this time
Cdown and third capacitor Cf charging.Control unit controls second switch device when the value of tertiary voltage signal reaches setting value
K4 and the 8th switching device S6 conducting, the cut-off of other switching devices, AC power source Us is by current-limiting resistance to first capacitor at this time
Cup charging.Control unit controls second switch device K4 and the tenth when the value of first voltage signal reaches twice of setting value
Switching device S8 conducting, the cut-off of other switching devices, AC power source Us is filled by current-limiting resistance to the second capacitor Cdown at this time
Electricity.Control unit controls first switch device K1 conducting when the value of second voltage signal reaches twice of setting value, other are opened
Device cut-off is closed, converter topology unit is in standby.Above first voltage signal, second voltage signal and the third electricity
It is not unique for pressing the corresponding relationship of the value of signal and the operation mode of converter topology unit, it will be understood that in other realities
It applies in example, it can also be using other corresponding relationships, as long as those skilled in the art think may be implemented.
In one embodiment, first voltage signal is the voltage value of first capacitor Cup, and second voltage signal is the second electricity
Hold the voltage value of Cdown, tertiary voltage signal is the voltage value of third capacitor Cf.Specifically, control unit is in first capacitor
First switch device K1 and second switch device are controlled when the voltage value of Cup, the second capacitor Cdown and third capacitor Cf are zero
K4 cut-off, converter topology unit is in shutdown status at this time.Voltage value of the control unit in third capacitor Cf is less than setting value
When control second switch device K4, the 7th switching device S5 and the 9th switching device S7 conducting, other switching devices cut-off, at this time
AC power source Us is charged by current-limiting resistance to first capacitor Cup, the second capacitor Cdown and third capacitor Cf.Control unit exists
Control second switch device K4 and the 8th switching device S6 conducting when the voltage value of third capacitor Cf reaches setting value, other switches
Device cut-off, AC power source Us is charged by current-limiting resistance to first capacitor Cup at this time.Control unit is first capacitor Cup's
Control second switch device K4 and the tenth switching device S8 conducting, other switching devices are cut when voltage value reaches twice of setting value
Only, AC power source Us is charged by current-limiting resistance to the second capacitor Cdown at this time.Electricity of the control unit in the second capacitor Cdown
Control first switch device K1 conducting when pressure value reaches twice of setting value, the cut-off of other switching devices, converter topology unit
It is in standby.By the closure of the 7th switching device S5 and the 9th switching device S7, to first capacitor Cup, the second capacitor
Cdown and third capacitor Cf charge simultaneously, after third capacitor Cf voltage reaches setting value, to first capacitor Cup and the second capacitor
Cdown charging.This topology unit structure is simple, easy to control, and increased auxiliary branch is less, may be implemented safe and reliable efficient
Soft start, and this soft-start method will not influence the work of main circuit in normal conditions, be applicable not only to phase three-wire three
The five-electrical level inverter circuit of system, and it is suitable for the five-electrical level inverter circuit of three-phase four-wire system and the H bridge electricity of two-phase bridge arm
Road.
Above-described embodiment in order to better understand carries out detailed explanation below in conjunction with one embodiment.At one
In embodiment, a kind of soft-start method of exchange side charging for the converter topology unit is provided, Fig. 2 and Fig. 8 are referred to,
The following steps are included:
Step S01: Up Highway UHW capacitor Cup, the voltage of Down Highway capacitor Cdown is zero, striding capacitance Cfa, Cfb, Cfc
Voltage be also zero, switching device K1, K2, K3, K4, K5, K6 are disconnected, and converter topology unit is in shutdown status, at this point,
It is closed main switching device S5, S7 of every phase, and closure switch K4, K5, K6, limit is passed through by three-phase alternating-current supply Usa, Usb, Usc
Leakage resistance R1, R2, R3 charge to Up Highway UHW capacitor Cup, Down Highway capacitor Cdown and striding capacitance Cfa, Cfb, Cfc.
Step S02: when striding capacitance Cfa, Cfb, Cfc voltage reaches setting value E, (E indicates total busbar voltage setting value
A quarter, similarly hereinafter), i.e., a quarter of busbar voltage when, disconnect main switching device S5, S7 of every phase, and be closed every phase
Main switching device S6 is filled by current-limiting resistance R1, R2, R3 to Up Highway UHW capacitor Cup by three-phase alternating-current supply Usa, Usb, Usc
Electricity.
Step S03: it when Up Highway UHW capacitor Cup voltage reaches setting value 2E, the i.e. half of busbar voltage, disconnects every
The main switching device S6 of phase, and it is closed the main switching device S8 of every phase, current limliting electricity is passed through by three-phase alternating-current supply Usa, Usb, Usc
R1, R2, R3 is hindered to charge to Down Highway capacitor Cdown.
Step S04: it when bus capacitor Cdown voltage reaches setting value 2E, the i.e. half of busbar voltage instantly, disconnects
The main switching device S8 of every phase, and closure switch device K1, K2, K3, soft start-up process are completed, which is in
Standby mode.
In one embodiment, the soft-start method to charge for being suitable for the exchange side of the converter topology unit is soft
Control pulse sequence and capacitance voltage waveform in start-up course, refer to Fig. 9, in which:
1 (t of stage0-t1): as shown in Fig. 2, the voltage of Up Highway UHW capacitor Cup, Down Highway capacitor Cdown are zero, fly across
The voltage of capacitor Cfa is also zero, and switching device K1, K2, K3, K4, K5, K6 are disconnected, and converter topology unit, which is in, shuts down shape
State.
2 (t of stage1-t2): as shown in figure 3, be closed every phase main switching device S5, S7 (Sa5, Sa7 in specifically Fig. 3,
Sb5, Sb7, Sc5, Sc7), and closure switch device K4, K5, K6, current-limiting resistance is passed through by three-phase alternating-current supply Usa, Usb, Usc
R1, R2, R3 charge to Up Highway UHW capacitor Cup, Down Highway capacitor Cdown and striding capacitance Cfa, Cfb, Cfc, until striding capacitance
Cfa, Cfb, Cfc voltage reaches setting value E (E indicates a quarter of total busbar voltage setting value, similarly hereinafter), i.e. busbar voltage
A quarter.
2 (t of stage2-t3): as shown in figure 4, disconnect every phase main switching device S5, S7 (Sa5, Sa7 in specifically Fig. 4,
Sb5, Sb7, Sc5, Sc7), and it is closed the main switching device S6 (specifically Sa6, Sb6, Sc6) of every phase, by three-phase alternating-current supply
Usa, Usb, Usc are charged by current-limiting resistance R1, R2, R3 to Up Highway UHW capacitor Cup, until Up Highway UHW capacitor Cup voltage reaches
Setting value 2E, the i.e. half of busbar voltage.
4 (t of stage3-t4): as shown in figure 5, disconnecting the main switch S6 (specifically Sa6, Sb6, Sc6) of every phase, and it is closed
The main switch S8 (specifically Sa8, Sb8, Sc8) of every phase, by three-phase alternating-current supply Usa, Usb, Usc by current-limiting resistance R1,
R2, R3 charge to Down Highway capacitor Cdown, until Down Highway capacitor Cdown voltage reaches setting value 2E, i.e., the two of busbar voltage
/ mono-.
Stage 5 (t4-t5): as shown in fig. 6, disconnecting main switching device S8 (specifically Sa8, Sb8, Sc8, and close of every phase
Combination switch device K1, K2, K3, the converter topology unit are in standby.
Based on the above embodiment, the soft-start method suitable for the exchange side charging of the converter topology unit utilizes three-phase
For AC power source Us to the capacitor charging in current transformer, structure is simple, easy to control, and increased auxiliary branch is less, at most only needs
Six extra switch device K1, K2, K3, K4, K5, K6 and three additional resistances R1, R2, R3 are wanted, adjunct circuit is extremely simple.Together
When, using main switching device S5, S6, S7, S8 of every phase as a part of soft start, and remain the complete independence of every phase bridge arm
Property, realize that striding capacitance voltage first reaches its setting value in bus capacitor voltage, guarantees voltage when each main switch soft start
Stress is not higher than voltage stress when normal operation, realizes safe and reliable efficient soft start, is applicable not only to phase three-wire three
The five-electrical level inverter circuit of system, and it is suitable for the five-electrical level inverter circuit of three-phase four-wire system and the H bridge electricity of two-phase bridge arm
Road.
For embodiment shown in Fig. 7, specific implementation is similar with above-mentioned embodiment illustrated in fig. 2, for art technology
For personnel, on the basis of foregoing description, it is readily appreciated that, and will not be described here in detail.
Above-mentioned converter device, converter topology cell operation is in five operation modes, respectively the first operation mode,
Two operation modes, third operation mode, the 4th operation mode and the 5th operation mode, when converter topology cell operation is first
When operation mode, converter topology unit is in shutdown status；When converter topology cell operation is in the second operation mode, hand over
Galvanic electricity source Us charges to first capacitor Cup, the second capacitor Cdown and third capacitor Cf；When converter topology cell operation is
When three operation modes, AC power source Us charges to first capacitor Cup；When converter topology cell operation is in the 4th operation mode
When, AC power source Us charges to the second capacitor Cdown；When converter topology cell operation is in five operation modes, current transformer
Topology unit is in standby, this makes the voltage first of third capacitor Cf in first capacitor Cup's and the second capacitor Cdown
Voltage reaches setting value, and the voltage stress for each switching device for controlling three capacitor charging voltage is made to be not higher than normal operation
When voltage stress, extend the service life of each switching device, improve converter topology unit and converter device can
By property.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
Only several embodiments of the present invention are expressed for above embodiments, and the description thereof is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of converter topology unit, which is characterized in that opened including first capacitor, the second capacitor, first switch device, second
Close device, first resistor and single-phase bridge arm circuit, the single-phase bridge arm circuit include third switching device, the 4th switching device,
5th switching device, the 6th switching device, the 7th switching device, the 8th switching device, the 9th switching device, the tenth derailing switch
Part, third capacitor, first diode and the second diode；
Wherein, the first capacitor, the 7th switching device, the third switching device, the 4th switching device, described
9th switching device and second capacitor are sequentially connected, and the circuit midpoint between the first capacitor and second capacitor is made
For the first connecting pin, the third switching device and the public connecting end of the 4th switching device are as exchanging end, and described the
The public connecting end of seven switching devices and the third switching device as second connection end, the 4th switching device with it is described
The public connecting end of 9th switching device connects the second connection end as third connecting pin, third capacitor one end, separately
One end connects the third connecting pin；
6th switching device connects the 8th switching device, the 6th switching device and the 8th switching device
Public connecting end connects the cathode of the first diode, and the anode of the first diode connects first connecting pin, institute
The anode for stating first diode is the input terminal of the single-phase bridge arm circuit, and the 6th switching device is not connected with the described 8th and opens
The one end for closing device connects the second connection end, and one end that the 8th switching device is not connected with the 6th switching device connects
Connect the third connecting pin；
Tenth switching device connects the 5th switching device, the tenth switching device and the 5th switching device
Public connecting end connects the anode of second diode, and the cathode of second diode connects first connecting pin, institute
State one end connection second connection end that the tenth switching device is not connected with the 5th switching device, the 5th switching device
The one end for being not connected with the tenth switching device connects the third connecting pin；
The second switch device connects the first resistor, and the second switch device is not connected with one end of the first resistor
Connecting the exchange end, the first resistor is not connected with one end connection AC power source of the second switch device, and described second
Switching device one end connects the exchange end, and the other end connects the AC power source；
The converter topology cell operation is in five operation modes, respectively the first operation mode, the second operation mode, third
Operation mode, the 4th operation mode and the 5th operation mode, when the converter topology cell operation is in first Working mould
When state, the converter topology unit is in shutdown status；When the converter topology cell operation is in the second operation mode,
The AC power source gives the first capacitor, second capacitor and the third capacitor charging；When the converter topology list
In the third operation mode, the AC power source charges to the first capacitor for member work；When the converter topology list
In four operation mode, the AC power source gives second capacitor charging for member work；When the converter topology list
In five operation mode, the converter topology unit is in standby for member work.
2. converter topology unit according to claim 1, which is characterized in that
The first switch device and second switch device cut-off, so that the converter topology cell operation is described the
One operation mode；
The second switch device, the 7th switching device and the 9th switch device conductive, the cut-off of other switching devices,
So that the converter topology cell operation is in second operation mode；
The second switch device and the 8th switch device conductive, other switching devices cut-off, so that the current transformer is opened up
Cell operation is flutterred in the third operation mode；
The second switch device and the tenth switch device conductive, other switching devices cut-off, so that the current transformer is opened up
Cell operation is flutterred in the 4th operation mode；
The first switch break-over of device, other switching devices cut-off, so that the converter topology cell operation is described the
Five operation modes.
3. converter topology unit according to claim 1, which is characterized in that further include the 11st switching device, the tenth
Two switching devices, the 13rd switching device, the 14th switching device, second resistance and 3rd resistor, the AC power source include
First phase AC power source, the second phase AC power source and third phase AC power source, the single-phase bridge arm circuit include the first single-phase bridge
Arm circuit, the second single-phase bridge arm circuit and the single-phase bridge arm circuit of third；
Wherein, the second switch device connects the first resistor, and the second switch device is not connected with the first resistor
One end connect the exchange end of the described first single-phase bridge arm circuit, the first resistor is not connected with the one of the second switch device
End connects the first phase AC power source, and second switch device one end connects the exchange of the described first single-phase bridge arm circuit
End, the other end connect the first phase AC power source；
12nd switching device connects the second resistance, and the 12nd switching device is not connected with the second resistance
One end connects the exchange end of the described second single-phase bridge arm circuit, and the second resistance is not connected with the one of the 12nd switching device
End connects the second phase AC power source, and described 11st switching device one end connects the exchange of the described second single-phase bridge arm circuit
End, the other end connect the second phase AC power source；
14th switching device connects the 3rd resistor, and the 14th switching device is not connected with the 3rd resistor
One end connects the exchange end of the single-phase bridge arm circuit of the third, and the 3rd resistor is not connected with the one of the 14th switching device
End connects the third phase AC power source, and described 13rd switching device one end connects the exchange of the single-phase bridge arm circuit of the third
End, the other end connect the third phase AC power source, the first single-phase bridge arm circuit, the second single-phase bridge arm circuit and institute
The input terminal for stating the single-phase bridge arm circuit of third is all connected with first connecting pin.
4. converter topology unit according to claim 1, which is characterized in that it further include exchange side filter circuit, it is described
The input terminal for exchanging side filter circuit connects the exchange end, and the output end of the exchange side filter circuit connects the alternating current
Source.
5. converter topology unit according to claim 4, which is characterized in that the exchange side filter circuit includes electricity
Sense, described inductance one end connect the exchange end, and the other end connects the AC power source.
6. converter topology unit according to claim 1, which is characterized in that the third switching device, the described 4th
Switching device, the 5th switching device, the 6th switching device, the 7th switching device, the 8th switching device,
9th switching device and the tenth switching device are switching tube.
7. converter topology unit according to claim 5, which is characterized in that the 5th switching device and the described 6th
Switching device is inverse-impedance type switching tube, the third switching device, the 4th switching device, the 7th switching device and
Described equal one diode of inverse parallel of 9th switching device.
8. a kind of converter device characterized by comprising
The described in any item converter topology units of claim 1 to 7；
Control unit is separately connected with each switching device, is opened up for controlling the signal control current transformer based on the received
The on state or off state of each switching device in unit is flutterred, so that converter device work is in corresponding Working mould
State.
9. converter device according to claim 8, which is characterized in that the control signal of described control unit includes first
Voltage signal, second voltage signal and tertiary voltage signal；
Described control unit is in the value of the first voltage signal, the second voltage signal and the tertiary voltage signal
The first switch device and second switch device cut-off are controlled when zero；
Described control unit controls the second switch device, described the when the value of the tertiary voltage signal is less than setting value
Seven switching devices and the 9th switch device conductive, the cut-off of other switching devices；
Described control unit controlled when the value of the tertiary voltage signal reaches the setting value second switch device and
8th switch device conductive, the cut-off of other switching devices；
Described control unit controls the second switch when the value of the first voltage signal reaches twice of the setting value
Device and the tenth switch device conductive, the cut-off of other switching devices；
Described control unit controls the first switch when the value of the second voltage signal reaches twice of the setting value
Break-over of device, the cut-off of other switching devices；The setting value is a quarter of bus voltage value.
10. converter device according to claim 9, which is characterized in that the first voltage signal is first electricity
The voltage value of appearance, the second voltage signal are the voltage value of second capacitor, and the tertiary voltage signal is the third
The voltage value of capacitor.
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| CN110829873A (en) * | 2019-12-11 | 2020-02-21 | 阳光电源股份有限公司 | Inverter circuit and control method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202261005U (en) * | 2011-10-18 | 2012-05-30 | 中国矿业大学 | Pre-charging circuit for five-level current transformer |
| CN103797702A (en) * | 2012-01-13 | 2014-05-14 | 富士电机株式会社 | Multilevel power conversion circuit |
| CN105811795A (en) * | 2016-05-10 | 2016-07-27 | 浙江大学 | Master-slave hybrid cascaded multilevel inverter |
| CN104218832B (en) * | 2013-05-30 | 2016-12-28 | 阳光电源股份有限公司 | A kind of single-phase five level topology and inverters |
| CN106685206A (en) * | 2016-08-31 | 2017-05-17 | 株式会社村田制作所 | Power-factor correction device and control method thereof and electronic device |
| CN107070274A (en) * | 2016-12-16 | 2017-08-18 | 中冶赛迪电气技术有限公司 | A kind of five level inverse conversion units |
| CN107070276A (en) * | 2017-04-20 | 2017-08-18 | 上海交通大学 | Active neutral point clamp Five-level converter DC side charging soft starting circuit and method |
| CN107070277A (en) * | 2017-04-20 | 2017-08-18 | 上海交通大学 | Active neutral point clamp Five-level converter AC charging soft starting circuit and method |
| CN108599549A (en) * | 2018-06-01 | 2018-09-28 | 广东美的制冷设备有限公司 | Totem pfc circuit, pulse width control method, air conditioner and storage medium |
| CN208424231U (en) * | 2018-05-03 | 2019-01-22 | 易事特集团股份有限公司 | Five level topology units and five level AC/DC convertors |
-
2019
- 2019-03-04 CN CN201910159527.1A patent/CN109921676A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202261005U (en) * | 2011-10-18 | 2012-05-30 | 中国矿业大学 | Pre-charging circuit for five-level current transformer |
| CN103797702A (en) * | 2012-01-13 | 2014-05-14 | 富士电机株式会社 | Multilevel power conversion circuit |
| CN104218832B (en) * | 2013-05-30 | 2016-12-28 | 阳光电源股份有限公司 | A kind of single-phase five level topology and inverters |
| CN105811795A (en) * | 2016-05-10 | 2016-07-27 | 浙江大学 | Master-slave hybrid cascaded multilevel inverter |
| CN106685206A (en) * | 2016-08-31 | 2017-05-17 | 株式会社村田制作所 | Power-factor correction device and control method thereof and electronic device |
| CN107070274A (en) * | 2016-12-16 | 2017-08-18 | 中冶赛迪电气技术有限公司 | A kind of five level inverse conversion units |
| CN107070276A (en) * | 2017-04-20 | 2017-08-18 | 上海交通大学 | Active neutral point clamp Five-level converter DC side charging soft starting circuit and method |
| CN107070277A (en) * | 2017-04-20 | 2017-08-18 | 上海交通大学 | Active neutral point clamp Five-level converter AC charging soft starting circuit and method |
| CN208424231U (en) * | 2018-05-03 | 2019-01-22 | 易事特集团股份有限公司 | Five level topology units and five level AC/DC convertors |
| CN108599549A (en) * | 2018-06-01 | 2018-09-28 | 广东美的制冷设备有限公司 | Totem pfc circuit, pulse width control method, air conditioner and storage medium |
Non-Patent Citations (1)
| Title |
|---|
| SHUAI ZHENG等: "A Novel Five-Level Inverter and Its Optimal Modulation and Control Method", 《2018 IEEE INTERNATIONAL POWER ELECTRONICS AND APPLICATION CONFERENCE AND EXPOSITION (PEAC)》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829873A (en) * | 2019-12-11 | 2020-02-21 | 阳光电源股份有限公司 | Inverter circuit and control method thereof |
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