CN108667333A - A kind of bidirectional converter system - Google Patents
A kind of bidirectional converter system Download PDFInfo
- Publication number
- CN108667333A CN108667333A CN201810305609.8A CN201810305609A CN108667333A CN 108667333 A CN108667333 A CN 108667333A CN 201810305609 A CN201810305609 A CN 201810305609A CN 108667333 A CN108667333 A CN 108667333A
- Authority
- CN
- China
- Prior art keywords
- capacitance
- circuit
- bidirectional converter
- differential mode
- converter system
- 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.)
- Pending
Links
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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal 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
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
Abstract
The invention discloses a kind of bidirectional converter systems, including EMI circuits, three-level inverter, control panel, sample circuit and driving circuit, the three-level inverter is connected to three phase network by EMI circuits, and the control panel is connect by the driving circuit with three-level inverter；The sample circuit includes current sampling circuit and voltage sampling circuit, the current sampling circuit and voltage sampling circuit are connect with the control panel respectively, voltage jump amplitude is reduced using three-level inverter, the shutdown of inversion device is controlled by the way that the driving circuit that negative pressure turns off is arranged, due to the presence of negative pressure when shutdown, so that turn-off speed is faster, it reduces turn-off power loss and realizes and accurately control, busbar voltage and electric current are detected by sample circuit, the phase of grid side voltage is controlled by driving circuit by control panel, realize being switched fast for charge and discharge, with remarkable accuracy and flexibility.
Description
Technical field
The present invention relates to bidirectional converter technical field, especially a kind of bidirectional converter system.
Background technology
Currently, in the low power electrical domain of low pressure, the various aspects of power electronic technique are gradually ripe, next
Research will be high power density, high efficiency, high performance electronic product；And in high-power field, the technology of various aspects
Have become the research emphasis of current power electronic technique.As country is to wind-power electricity generation, solar energy power generating and energy storage electricity
The support energetically of input and the new energy, formation of Li-ion batteries project energetically stood, bidirectional converter will be used widely.
For at present, current transformer is primarily present three kinds of structures, respectively：(1) there are three single-phase H bridges to form；(2) by opening
It closes pipe and forms six bridge arms；(3) three-level inverter.First two structure is two-level inverter, and leaping voltage is DC bus
Voltage, high voltage jump amplitude bring higher ripple current to gird-connected inverter, to need larger outputting inductance
Inhibit ripple current with filter capacitor, thus brings higher ripple current loss, reduce current response rate, inhibit
The ability of output current and the problems such as generate serious electromagnetic interference.Three-level inverter is with its inherent advantages, very great Cheng
Solves the above problem on degree.But current three-level inverter generally existing control is inaccurate, using underaction etc.
Problem.
Invention content
To solve the above problems, the purpose of the present invention is to provide a kind of bidirectional converter system, the two-way of electric energy is realized
Flowing, while remarkable accuracy and flexibility being provided.
Technical solution is used by the present invention solves the problems, such as it：
A kind of bidirectional converter system includes the EMI circuits being connect with three phase network, the two-way flow for realizing energy
Three-level inverter, algorithm control and logic control are carried out to the three-level inverter control panel, sample circuit and adopt
The driving circuit turned off with negative pressure, the three-level inverter includes sequentially connected exchange connecting pin, inversion device and direct current
Connecting pin, the exchange connecting pin are connected to three phase network by EMI circuits, and the DC connecting end is connected to DC load,
The control panel is connect by the driving circuit with the inversion device；The sample circuit includes current sampling circuit and electricity
Sample circuit, the current sampling circuit and voltage sampling circuit is pressed to be connect respectively with the control panel, the control panel receives
The acquisition signal of current sampling circuit and voltage sampling circuit simultaneously exports control signal to the driving circuit, the driving circuit
Output drive signal controls the break-make of the inversion device.Voltage jump amplitude is reduced using three-level inverter, by setting
The driving circuit of negative pressure shutdown is set to control the shutdown of inversion device, due to the presence of negative pressure when shutdown so that turn-off speed is more
Soon, it reduces turn-off power loss and realizes and accurately control；Busbar voltage and electric current are detected by sample circuit, driving is passed through by control panel
Circuit controls the phase of grid side voltage, realizes being switched fast for charge and discharge, has remarkable accuracy and flexibility.
Further, the control panel includes the dsp chip for realizing algorithm control and the CPLD chips for realizing logic control.
Further, the EMI circuits include level-one filter circuit and secondary filter circuit, and the exchange connecting pin passes through two
Grade filter circuit and level-one filter circuit are connected to three phase network.
Further, the level-one filter circuit includes bleeder resistance Rk, the first capacitance C3 for filtering out DM EMI, uses
The second capacitance C11 in filtering common mode interference and third capacitance C12, first for inhibiting to exchange the DM EMI in electricity output
Differential mode inductance L2, the second capacitance C11 and third capacitance C12 series connection, the second electricity after the first capacitance C3, series connection
It connects with the first differential mode inductance L2 after holding C11 and third capacitance C12 branches, bleeder resistance Rk parallel connections.
Further, the secondary filter circuit includes for filtering out the 4th capacitance C6 of input terminal DM EMI, for filtering
Except the 5th capacitance C17 of input terminal common mode interference and the 6th capacitance C18, the 7th capacitance for filtering out output end DM EMI
C25, the 8th capacitance C23 for filtering out output end common mode interference and the 9th capacitance C24 are exchanged with for inhibition in electricity output
Second differential mode inductance L3, the 5th capacitance C17 and the 6th capacitance C18 series connection of DM EMI, the 8th capacitance C23
It connects with the 9th capacitance C24, the second differential mode inductance L3 is connect with the first differential mode inductance L2, the 4th capacitance
C6 is connected in parallel at the tie point of the second differential mode inductance L3 and the first differential mode inductance L2, the 5th capacitance C17 after the series connection and institute
The 6th capacitance C18 branch circuit parallel connections are stated at the tie point of the second differential mode inductance L3 and the first differential mode inductance L2, after the series connection
In the rear ends the second differential mode inductance L3, the 7th capacitance C25 is in parallel for 8th capacitance C23 and the 9th capacitance C24 branch circuit parallel connections
The 8th capacitance C23 after concatenation and the 9th capacitance C24 branches rear end.
Further, the inversion device includes three bridge arms for being connected in parallel on the DC connecting end, and the bridge arm includes four
A concatenated switching tube, by inductance connection to the bridge arm midpoint, the inversion device further includes using for the exchange connecting pin
In the clamp diode that the voltage of the DC connecting end is divided into three level.
Further, the control panel includes the dsp chip for realizing algorithm control and the CPLD chips for realizing logic control.
Further, the voltage sampling circuit is differential voltage sample circuit；The current sampling circuit is using two
The current sampling circuit of grade filtering.
Further, the driving circuit uses IXDN604SIA driving chips.
The beneficial effects of the invention are as follows：A kind of bidirectional converter system for the present invention that the present invention uses, the control panel
It receives the acquisition signal of current sampling circuit and voltage sampling circuit and exports control signal to the driving circuit, the driving
Circuit output drive signal controls the break-make of the inversion device, and voltage jump amplitude is reduced using three-level inverter, leads to
The driving circuit that setting negative pressure turns off is crossed to control the shutdown of inversion device, due to the presence of negative pressure when shutdown so that shutdown speed
Degree faster, reduces turn-off power loss and realizes accurately controlling；Busbar voltage and electric current are detected by sample circuit, is passed through by control panel
Driving circuit controls the phase of grid side voltage, realizes being switched fast for charge and discharge, has remarkable accuracy and spirit
Activity.
Description of the drawings
The invention will be further described with example below in conjunction with the accompanying drawings.
Fig. 1 is a kind of structural schematic diagram of bidirectional converter system of the present invention；
Fig. 2 is a kind of EMI circuit diagrams of bidirectional converter system of the present invention；
Fig. 3 is a kind of three-level inverter circuit figure of bidirectional converter system of the present invention；
Fig. 4 is a kind of voltage sampling circuit figure of bidirectional converter system of the present invention；
Fig. 5 is a kind of current sampling circuit figure of bidirectional converter system of the present invention；
Fig. 6 is a kind of driving circuit figure of bidirectional converter system of the present invention；
Fig. 7 is a kind of control strategy figure of bidirectional converter system of the present invention.
Specific implementation mode
Referring to Fig.1, a kind of bidirectional converter system of the invention includes the EMI circuits being connect with three phase network, for real
The three-level inverter of the two-way flow of existing energy, the control that algorithm control and logic control are carried out to the three-level inverter
Plate, sample circuit and using negative pressure shutdown driving circuit, the three-level inverter include sequentially connected exchange connecting pin,
Inversion device and DC connecting end, the exchange connecting pin are connected to three phase network by EMI circuits, and the DC connecting end connects
It is connected to DC load, the control panel is connect by the driving circuit with the inversion device；The sample circuit includes electricity
Stream sample circuit and voltage sampling circuit, the current sampling circuit and voltage sampling circuit are connect with the control panel respectively,
The control panel, which receives the acquisition signal of current sampling circuit and voltage sampling circuit and exports control signal, gives driving electricity
Road, the driving circuit output drive signal control the break-make of the inversion device.Voltage is reduced using three-level inverter
Hopping amplitude controls the shutdown of inversion device by the way that the driving circuit that negative pressure turns off is arranged, due to the presence of negative pressure when shutdown,
So that turn-off speed is faster, turn-off power loss is reduced and realizes accurately controlling；Busbar voltage and electric current are detected by sample circuit, by
Control panel controls the phase of grid side voltage by driving circuit, realizes being switched fast for charge and discharge, has brilliance
Accuracy and flexibility.
Specifically, with reference to shown in Fig. 3, three-level inverter uses three-level topology structure, will be straight by clamp diode
Stream busbar voltage is divided into three level, and each bridge arm is connected with four switching tubes, so that main power tube is only held when turning off
By the voltage of DC bus half, so being particularly suitable for high-power application scenario；And due to the increase of level number, output electricity
Corrugating is improved, and output voltage waveforms distortion is reduced (THD values are relatively low)；It can be obtained with lower switching frequency and high
The identical output voltage waveforms of two-level inverter under switching frequency, thus switching loss is small, it is efficient；In identical direct current mother
Under the conditions of line voltage, compared with two-level inverter, dv/dt stress is greatly reduced, and improves the EMI characteristics of device.
Further, the control panel includes the dsp chip for realizing algorithm control and the CPLD chips for realizing logic control, tool
Body, the dsp chip choose TMS320F2806 dsp chips, dominant frequency 100M, significantly relax for realize complicated algorithm when
Between require；PWM high resolutions provide the guarantee in performance up to 150pS for solving the problems, such as output noise；A/d resolution is
12, conversion speed 160nS, the accuracy and speed for solving loop sampling requires to provide the guarantee of performance；It is described
CPLD chips use EMP570 CPLD chips, I/O port frequencies to have preferable digital independent and driving propagation energy up to 66MHZ
Power；It is encapsulated using TQFP, is conducive to debugging assembling.TQFP encapsulation is thin plastic packaging quadrangle flat package, and thin quad flat package is low
Cost, low clearance leadframe package scheme, thin quad flat package to medium-performance, low number of leads require application scenario and
Speech is the most effective encapsulation scheme using cost, and can obtain the unnoticed encapsulation of a lightweight, TQFP series
Support the die size and number of leads of broad range, size range is from 7mm to 28mm, and number of leads is from 32 to 256.
With reference to shown in Fig. 7, the control strategy of this system is as follows：Booting carries out digital servo-control processing first, judges again later
The flow direction (current direction to be output to power grid from three-level inverter is just) of electric current, charges or puts to determine to be operated in
The pattern of electricity.Three-level inverter uses double-loop control strategy, including outer voltage and current inner loop, outer voltage it is main
Effect is to stablize busbar voltage, while providing current inner loop command value i* ref；Outer voltage command voltage U* dcAccording to power work
Point selection, but grid-connected requirement need be met, that is, reach required minimum inverter voltage requirement.Due to controlled volume UdcIt is DC quantity,
Good tracking performance can be obtained by being adjusted using PI controllers.Current inner loop mainly completes grid-connected current amplitude and phase
Control, that is, realize to it is grid-connected give constant current i* refTracking.
Further, the EMI circuits include level-one filter circuit 21 and secondary filter circuit 22, and the exchange connecting pin is logical
It crosses secondary filter circuit 22 and level-one filter circuit 21 is connected to three phase network.Specifically, with reference to shown in Fig. 2, the first-level filtering
Wave circuit 21 includes bleeder resistance Rk, the first capacitance C3 for filtering out DM EMI, the second electricity interfered for filtering common mode
Hold first differential mode inductance L2s of the C11 with third capacitance C12, for inhibiting to exchange the DM EMI in electricity output, second electricity
Hold C11 and third capacitance C12 series connection, the second capacitance C11 after the first capacitance C3, series connection and third capacitance C12 branch
It connects with the first differential mode inductance L2 after road, bleeder resistance Rk parallel connections；The secondary filter circuit 22 includes defeated for filtering out
Enter to hold the 4th capacitance C6, the 5th capacitance C17 for filtering out input terminal common mode interference and the 6th capacitance C18 of DM EMI, use
In the electricity of the 7th capacitance C25, the 8th capacitance C23 for filtering out output end common mode interference for filtering out output end DM EMI and the 9th
Hold C24 and the second differential mode inductance L3, the 5th capacitance C17 for inhibiting to exchange the DM EMI in electricity output and described
6th capacitance C18 series connection, the 8th capacitance C23 and the 9th capacitance C24 series connection, the second differential mode inductance L3 with it is described
First differential mode inductance L2 connections, the 4th capacitance C6 are connected in parallel on the tie point of the second differential mode inductance L3 and the first differential mode inductance L2
Place, the 5th capacitance C17 and the 6th capacitance C18 branch circuit parallel connections after the series connection are in the second differential mode inductance L3 and the first differential mode
At the tie point of inductance L2, the 8th capacitance C23 and the 9th capacitance C24 branch circuit parallel connections after the series connection are in second differential mode electricity
Feel L3 rear ends, the 7th capacitance C25 parallel connections the 8th capacitance C23 after concatenation and the 9th capacitance C24 branches rear end.
Further, with reference to shown in Fig. 4, the voltage sampling circuit includes the first operational amplifier U2A, the second operation amplifier
Device U2B, in-phase end input resistance 41, reverse side input resistance 42, the first RC filter circuits 43 and the 2nd RC filter circuits 44, institute
It states in-phase end input resistance 41 and reverse side input resistance 42 is respectively connected to the in-phase end and reverse phase of the first operational amplifier U2A
End, the in-phase end input resistance 41 include resistance R256, R257, R258, R259 and the R260 being serially connected, the reverse side
Input resistance 42 includes resistance R249, R250, R251, R254 and the R265 being serially connected, the first operational amplifier U2A's
In-phase end is grounded by the first RC filter circuits 43, and the reverse side of the first operational amplifier U2A passes through the 2nd RC filtered electricals
Road 44 is connected to its output end, and the in-phase end and reverse side of the first operational amplifier U2A are parallel with capacitance C199；Described
The output end of one operational amplifier U2A is connected to the reverse side of second operational amplifier U2B, second fortune by resistance R262
The reverse side for calculating amplifier U2B is connected to its its output end, the in-phase end of the second operational amplifier U2B by resistance R263
It is grounded by resistance R264, the output single pass-through resistance R265 of the second operational amplifier U2B is connected to voltage sample output
Vp, the sampled output Vp is held to be grounded by capacitance C148.The voltage sampling circuit uses differential circuit design, to improve
Noiseproof feature, and RC filter circuits are added in the in-phase end of the first operational amplifier U2A, filter off high-frequency noise.
Further, referring to Figure 5, the current sampling circuit includes third operational amplifier U102A and the 4th operation
The in-phase end of amplifier U102B, the third operational amplifier U102A are connected with resistance R266, the third operational amplifier
The in-phase end of U102A is also grounded by capacitance C211, and it is defeated that the reverse side of the third operational amplifier U102A is connected directly to its
The output end of outlet, the third operational amplifier U102A is connected to the same of four-operational amplifier U102B by resistance R287
The reverse side of Xiang Duan, the four-operational amplifier U102B are connected directly to its output end, the four-operational amplifier
The output end of U102B is connected to current sample output end InvSamIA, the current sample output end by resistance R288
InvSamIA is grounded by capacitance R212.The current sampling circuit is designed using two stage filter, and by the voltage of current waveform
Value is promoted to positive value, has met the signal input requirements of the ports AD.
Further, with reference to shown in Fig. 6, driving circuit includes NPN type triode Q1 and PNP type triode Q3, three pole of NPN type
The collector of pipe Q1 is connected to power supply VCC, and the emitter of NPN type triode Q1 is connected with the emitter of PNP type triode Q3,
NPN type triode Q1 links together with the base stage of PNP type triode Q3 and connects pulse input end PWM_IN by resistance R1,
The base stage of PNP type triode Q3 is also grounded by resistance R3；Pulse input end PWM IN input AC pulse signals, when pulse is believed
When number being negative, pass through resistance R1 and resistance R3 ground connection so that the base voltage of NPN type triode Q1 and PNP type triode Q3
For negative value, triode shutdown；It is timing equally to work as pulse signal, passes through resistance R1 and resistance R3 ground connection so that NPN type triode
The base voltage of Q1 and PNP type triode Q3 are also positive value, and triode ON realizes the negative pressure shutdown of driving circuit.The drive
The driving chip U3 of dynamic circuit uses IXDN604SIA driving chips.
The above, only presently preferred embodiments of the present invention, the invention is not limited in the above embodiments, as long as
It reaches the technique effect of the present invention with identical means, should all belong to the scope of protection of the present invention.
Claims (9)
1. a kind of bidirectional converter system, which is characterized in that include the EMI circuits being connect with three phase network, for realizing energy
Two-way flow three-level inverter, carry out the control panel of algorithm control and logic control to the three-level inverter, adopt
Sample circuit and the driving circuit turned off using negative pressure, the three-level inverter includes sequentially connected exchange connecting pin, inversion
Device and DC connecting end, the exchange connecting pin are connected to three phase network by EMI circuits, and the DC connecting end is connected to
DC load, the control panel are connect by the driving circuit with the inversion device；The sample circuit includes that electric current is adopted
Sample circuit and voltage sampling circuit, the current sampling circuit and voltage sampling circuit are connect with the control panel respectively, described
Control panel receives the acquisition signal of current sampling circuit and voltage sampling circuit and exports control signal to the driving circuit, institute
State the break-make that driving circuit output drive signal controls the inversion device.
2. a kind of bidirectional converter system according to claim 1, which is characterized in that the EMI circuits include first-level filtering
Wave circuit (21) and secondary filter circuit (22), the exchange connecting pin pass through secondary filter circuit (22) and level-one filter circuit
(21) it is connected to three phase network.
3. a kind of bidirectional converter system according to claim 2, which is characterized in that level-one filter circuit (21) packet
Include bleeder resistance (Rk), the first capacitance (C3) for filtering out DM EMI, the second capacitance (C11) interfered for filtering common mode
The first differential mode inductance (L2) with third capacitance (C12), for inhibiting to exchange the DM EMI in electricity output, second capacitance
(C11) it connects with the third capacitance (C12), the second capacitance (C11) after the first capacitance C3, series connection and third capacitance
(C12) it connects with first differential mode inductance (L2) after branch, bleeder resistance Rk parallel connections.
4. a kind of bidirectional converter system according to claim 3, which is characterized in that secondary filter circuit (22) packet
Include the 4th capacitance (C6) for filtering out input terminal DM EMI, the 5th capacitance (C17) for filtering out input terminal common mode interference
The 7th capacitance (C25) with the 6th capacitance (C18), for filtering out output end DM EMI, for filtering out output end common mode interference
The 8th capacitance (C23) and the 9th capacitance (C24) and the second differential mode inductance for inhibiting to exchange the DM EMI in electricity output
(L3), the 5th capacitance (C17) and the 6th capacitance (C18) series connection, the 8th capacitance (C23) and the 9th capacitance
(C24) it connects, second differential mode inductance (L3) connect with first differential mode inductance (L2), and the 4th capacitance (C6) is in parallel
At the tie point of the second differential mode inductance (L3) and the first differential mode inductance (L2), the 5th capacitance (C17) after the series connection and the
Six capacitances (C18) branch circuit parallel connection is at the tie point of the second differential mode inductance (L3) and the first differential mode inductance (L2), after the series connection
The 8th capacitance (C23) and the 9th capacitance (C24) branch circuit parallel connection in the second differential mode inductance (L3) rear end, the 7th capacitance
(C25) the 8th capacitance (C23) after concatenation in parallel and the 9th capacitance (C24) branch rear end.
5. a kind of bidirectional converter system according to claim 1, which is characterized in that the inversion device include three simultaneously
It is associated in the bridge arm of the DC connecting end, the bridge arm includes four concatenated switching tubes, and the exchange connecting pin passes through inductance
It is connected to the bridge arm midpoint, the inversion device further includes for the voltage of the DC connecting end to be divided into three level
Clamp diode.
6. a kind of bidirectional converter system according to claim 1, which is characterized in that the control panel includes realizing algorithm
The dsp chip of control and the CPLD chips for realizing logic control.
7. a kind of bidirectional converter system according to claim 1, which is characterized in that the voltage sampling circuit is difference
Formula voltage sampling circuit.
8. a kind of bidirectional converter system according to claim 1, which is characterized in that the current sampling circuit is to use
The current sampling circuit of two stage filter.
9. a kind of bidirectional converter system according to claim 1, which is characterized in that the driving circuit uses
IXDN604SIA driving chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810305609.8A CN108667333A (en) | 2018-04-04 | 2018-04-04 | A kind of bidirectional converter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810305609.8A CN108667333A (en) | 2018-04-04 | 2018-04-04 | A kind of bidirectional converter system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108667333A true CN108667333A (en) | 2018-10-16 |
Family
ID=63783226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810305609.8A Pending CN108667333A (en) | 2018-04-04 | 2018-04-04 | A kind of bidirectional converter system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108667333A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421977A (en) * | 2020-09-30 | 2021-02-26 | 南洋电力设备有限公司 | Independent capacitor voltage control method of three-level converter |
| CN112868175A (en) * | 2019-01-28 | 2021-05-28 | 华为技术有限公司 | Equipment, method and system for solving common-mode voltage interference |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368377A (en) * | 2013-07-17 | 2013-10-23 | 华南理工大学 | Preceding-stage EMI filtering protective circuit of driving power source |
| CN203377835U (en) * | 2013-07-01 | 2014-01-01 | 唐山开诚电控设备集团有限公司 | Mine explosion-proof three-level variable-frequency speed adjusting device |
| CN103825291A (en) * | 2014-02-24 | 2014-05-28 | 国家电网公司 | Method for controlling modularized three-level energy storage in grid-connected state and grid-disconnected state |
| CN204517697U (en) * | 2015-03-30 | 2015-07-29 | 深圳市鹏源电子有限公司 | The two-way contravariant converter of three-phase |
| CN205453484U (en) * | 2016-03-25 | 2016-08-10 | 成都大奇鹰科技有限公司 | AC -DC switching power supply input protection circuit |
| CN206807019U (en) * | 2017-06-02 | 2017-12-26 | 西安思坦科技有限公司 | Current three-phase imbalance compensation device based on three level NPC |
-
2018
- 2018-04-04 CN CN201810305609.8A patent/CN108667333A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203377835U (en) * | 2013-07-01 | 2014-01-01 | 唐山开诚电控设备集团有限公司 | Mine explosion-proof three-level variable-frequency speed adjusting device |
| CN103368377A (en) * | 2013-07-17 | 2013-10-23 | 华南理工大学 | Preceding-stage EMI filtering protective circuit of driving power source |
| CN103825291A (en) * | 2014-02-24 | 2014-05-28 | 国家电网公司 | Method for controlling modularized three-level energy storage in grid-connected state and grid-disconnected state |
| CN204517697U (en) * | 2015-03-30 | 2015-07-29 | 深圳市鹏源电子有限公司 | The two-way contravariant converter of three-phase |
| CN205453484U (en) * | 2016-03-25 | 2016-08-10 | 成都大奇鹰科技有限公司 | AC -DC switching power supply input protection circuit |
| CN206807019U (en) * | 2017-06-02 | 2017-12-26 | 西安思坦科技有限公司 | Current three-phase imbalance compensation device based on three level NPC |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112868175A (en) * | 2019-01-28 | 2021-05-28 | 华为技术有限公司 | Equipment, method and system for solving common-mode voltage interference |
| US11791719B2 (en) | 2019-01-28 | 2023-10-17 | Huawei Digital Power Technologies Co., Ltd. | Device, method, and system for resolving common-mode voltage interference |
| CN112421977A (en) * | 2020-09-30 | 2021-02-26 | 南洋电力设备有限公司 | Independent capacitor voltage control method of three-level converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110611435B (en) | Topological structure of cascade flexible alternating current chain converter | |
| CN106301042B (en) | A kind of seven electrical level inverters | |
| CN107834838B (en) | A kind of control method of non-isolation type Three-phase PFC | |
| CN107342698B (en) | A kind of the three-phase and four-line zero voltage switch rectifier circuit and its modulator approach of band balance bridge arm | |
| CN104638971B (en) | A kind of photovoltaic combining inverter and its control method | |
| CN101515763A (en) | Series-parallel connection output tri-level half-bridge inverter and half period hysteresis control method thereof | |
| CN110138250A (en) | A kind of switching capacity N electrical level inverter and its modulator approach | |
| CN107276441A (en) | Striding capacitance five-electrical level inverter, phase-shifting control method and grid-connected power generation system | |
| CN105281361B (en) | A kind of five-level double step-down combining inverter | |
| CN108923663A (en) | Single-phase bipolar AC-AC converter topology structure and its modulator approach | |
| CN103166489A (en) | Control circuit for three-phase high power factor rectifier | |
| CN104092400A (en) | Z-source three-level T-type inverter and modulating method thereof | |
| CN110048629A (en) | A kind of single input switching capacity multi-electrical level inverter and its modulator approach | |
| CN107134937A (en) | A kind of three level multiple-pulses output transformerless inverter circuit | |
| CN106452142B (en) | A kind of improvement modulation strategy suitable for Modular multilevel converter | |
| CN106787669A (en) | A kind of digital control Active Power Factor Correction Converter of boost type | |
| CN108667333A (en) | A kind of bidirectional converter system | |
| CN108183621A (en) | A kind of single-phase quasi- Z-source inverter and its power density based on SiC improve method | |
| CN108448918A (en) | A kind of single-phase grid-connected photovoltaic DC-to-AC converter of transless | |
| CN111245260A (en) | Bridgeless PFC switching power supply circuit | |
| CN206865369U (en) | Three level multiple-pulses export transformerless inverter circuit | |
| CN104682762B (en) | Low-leakage-current grid-connected inverter | |
| CN204031005U (en) | The T-shaped inverter of a kind of Z source three level | |
| CN203151389U (en) | Control circuit of three-phase high power factor rectifier | |
| CN107332456B (en) | A kind of three-phase passive flexible switch inverter circuit |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181016 |