CN108199567A - A kind of pre-charging device and method of middle pressure big-power transducer - Google Patents
A kind of pre-charging device and method of middle pressure big-power transducer Download PDFInfo
- Publication number
- CN108199567A CN108199567A CN201711471668.4A CN201711471668A CN108199567A CN 108199567 A CN108199567 A CN 108199567A CN 201711471668 A CN201711471668 A CN 201711471668A CN 108199567 A CN108199567 A CN 108199567A
- Authority
- CN
- China
- Prior art keywords
- middle pressure
- module
- power
- power transducer
- charging device
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
Abstract
The invention discloses a kind of pre-charging devices of middle pressure big-power transducer, which is characterized in that the present apparatus includes：Soft-start module 2, rectifier transformer 3, rectification module 4 and preliminary filling electric control module 5, preliminary filling electric control module 5 carry out information exchange for controlling entire pre-charge process with frequency converter control system；Soft-start module 2 is used to adjust the virtual value of 3 input voltage of rectifier transformer, dash current caused by dc bus charging when avoiding directly powering on；Rectifier transformer 3 is used for the ac voltage that low pressure is adjusted to pre-charge process and is suitble to, and available for multi-pulse rectification, reduces DC side pulsation of current；Rectification module 4 is used to the alternating voltage that rectifier transformer exports becoming DC voltage, is directly used in the precharge of dc bus.
Description
Technical field
The invention belongs to middle pressure big-power transducer technical fields, and in particular to a kind of preliminary filling of middle pressure big-power transducer
Electric installation and method.
Background technology
The middle high-power multi-level frequency conversion device application range in industrial control field of pressure expands increasingly, wherein three-level frequency-converter
Device with its it is simple in structure, output capacity is big, current harmonic content is small the advantages that increasingly paid attention to.
The intermediate DC link of pressure big-power transducer is usually in pressure high-power tri-level variable frequency device etc. in voltage-source type
Electrolytic capacitor, for electrolytic capacitor in the case where not establishing voltage status, powered on moment is equivalent to short-circuit condition, and charging current will very
Greatly, front end rectifier equipment, dc bus and the capacitance for its power supply may be damaged, so powered on moment has to limitation charging electricity
Stream.Normal practice is to increase high voltage connector and power resistor at present, may result in the increase of frequency converter cost in this way, volume increases
Greatly, power consumption and trouble point increase.
Equally, for middle pressure big-power transducer, grid side usually sets high-power rectifier transformer, this rectification becomes
Depressor secondary side has multiple windings, for multi-pulse rectification, to reduce the pollution to power grid.Except the electrolysis electricity of intermediate DC link
Outside the influence of appearance, when network voltage is applied directly on the rectifier transformer for do not set up the stabilization of excitation, 7-10 times can be generated
Excitation current, influences the safe and stable operation of power grid, while can impact frequency converter internal components, influences its service life.
The first object of the present invention is to solve above-mentioned existing technical problem, provides a kind of pre-charging device, avoid mother
Impact of the line capacitance charging current to frequency converter, improves system effectiveness, reduces system cost, and reduces frequency converter and transporting
Trouble point during row.
Second purpose is impacted caused by avoiding excitation current because of rectifier transformer to power grid.
Invention content
The first technical solution of the present invention is a kind of pre-charging device of middle pressure big-power transducer, which is characterized in that packet
It includes：Soft-start module (2), rectifier transformer (3), rectification module (4) and preliminary filling electric control module (5)；
The input terminal of the soft-start module (2) is connected with low-tension supply, the primary side of output terminal and rectifier transformer (3)
It is connected；The input terminal of the rectification module (4) is connected with the secondary side of rectifier transformer (3), output terminal and the middle high-power change of pressure
The dc bus of frequency device is connected；In soft-start module (2), A.C. contactor (6) is set between low-tension supply.
Second technical solution is based on the first technical solution, which is characterized in that the soft-start module (2) is including AC voltage adjusting
Circuit and its driving circuit.
Third technical solution is based on the second technical solution, which is characterized in that the rectifier transformer (3) has boosting work(
Can, the pre-charging device includes N1 rectifier transformer, and wherein N1 is more than or equal to 1；Each rectifier transformer secondary side winding
Quantity is N2, and wherein N2 is more than or equal to 1.
4th technical solution is based on the first technical solution, which is characterized in that the rectification module (4) is by uncontrollable rectified current
Road forms, used in parallel between rectification module or be used in series.
5th technical solution is based on the first technical solution, which is characterized in that the preliminary filling electric control module (5) is comprising can compile
Journey device and its minimum system, voltage collection circuit, telecommunication circuit.
6th technical solution is based on third technical solution, which is characterized in that can not included in the rectification module (4)
Control rectifying circuit is connected with the secondary side winding of rectifier transformer (3), and corresponds, and rectification module is included uncontrollable whole
The quantity of current circuit is N1*N2.
Any technical solution during 7th technical solution is based on the first to the 6th, which is characterized in that the high-power change of medium pressure
Frequency device is middle pressure high-power tri-level variable frequency device or the middle high-power five-level converter of pressure.
8th technical solution for it is a kind of it is middle pressure big-power transducer pre-charging device charging method, the big work(of medium pressure
The pre-charging device of rate frequency converter is any pre-charging device in claim 1 to 7,
It is characterised in that it includes following steps：
(1) after preliminary filling electric control module (5) receives user's enabled instruction, it is closed the A.C. contactor (6) first, and lead to
Cross soft-start module (2) realize it is soft open process, to frequency converter busbar Support Capacitor charge；
(2) charging situation of the dc bus of big-power transducer, busbar voltage are pressed in preliminary filling electric control module (5) detection
After reaching preset value, in control press big-power transducer switch element, by net side current transformer according to predetermined curve be frequency conversion
Device main transformer carries out pre-excitation；It is it into line precharge if there is other busbar parts during pre-excitation；
(3) after the completion of detecting precharge, contactor (6) is disconnected, stops described device work.
9th technical solution is based on the 8th technical solution, which is characterized in that if the middle pressure big-power transducer of precharge
For two quadrant frequency converters, step (2) is omitted.
Description of the drawings
Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as limitation of the present invention.Entire attached
In figure, the same reference numbers will be used to refer to the same parts.
Fig. 1 is common middle pressure high-power tri-level variable frequency device topological diagram；
Fig. 2 is another common middle pressure high-power tri-level variable frequency device topological diagram；
Fig. 3 is for the pre-charging device topological diagram of middle pressure high-power tri-level variable frequency device；
Fig. 4 is the pre-charging device topological diagram of the middle pressure high-power tri-level variable frequency device with N number of rectifier transformer；
Fig. 5 is soft-start module AC voltage adjusting process schematic.
Specific embodiment
The present invention provides many applicable creative concepts, which can be reflected in a large number of on specific
Hereinafter.Specific embodiment described in following embodiments of the present invention is only as the specific embodiment of the present invention
Exemplary illustration, and be not meant to limit the scope of the invention.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.First with middle pressure high-power three
Centering pressure big-power transducer illustrates for level converter.
Fig. 1 is common middle pressure high-power tri-level variable frequency device topological diagram.As shown in Figure 1, power grid and rectifier transformer 11
Primary side (A, B, C) be connected, there are two three-phase windings for the secondary side of rectifier transformer 11, and winding 11a connects for star, winding 11b
For corner connection.Two Active Front End AFE are connect respectively with winding 11a, winding 11b.Hereinafter it is related to the Active Front End AFE on top
When, it being replaced with AFE1, when being related to the Active Front End AFE of lower part, is replaced with AFE2, two Active Front End AFE are cascaded structure,
Its joint is neutral point o, and is connected directly on the neutral point of busbar Support Capacitor 12 and three-level inverter 13.
Since the secondary side of rectifier transformer 11 there are multiple windings, multi-pulse rectification can be carried out, reduces the pollution to power grid.
Fig. 2 is another common middle pressure high-power tri-level variable frequency device topological diagram.As shown in Fig. 2, this three-level topology
For back-to-back pattern, left side is tri- level active front-end A FE of NPC, and right side is three-level inverter 23, three level active front ends
It is busbar Support Capacitor 22 between AFE and three-level inverter 23.Active Front End AFE by after PWM wave filters (not shown) with
The secondary side of power transformer 21 is connected.The primary side (A, B, C) of power transformer 21 is connected to power grid.Fig. 1, shown in 2
Middle pressure high-power tri-level variable frequency device is in powered on moment, if busbar Support Capacitor (12,22) does not establish voltage, for front end
For rectifier equipment, short-circuit condition is equivalent to, excessive charging current may damage the front end rectifier equipment for its power supply.It is existing
In technology, charging current is limited, but the disadvantages of this method is frequency converter cost by increasing high voltage connector and power resistor
Increase, volume increases, power consumption and trouble point increase.
For the middle pressure high-power tri-level variable frequency device of Fig. 1, due to the use of rectifier transformer 11, when network voltage is straight
When connecing on the rectifier transformer 11 for being applied to and do not set up the stabilization of excitation, the excitation current of 7-10 times of rated current can be generated, it is excessive
Electric current not only influence the safe and stable operation of power grid, while frequency converter internal components can be impacted, influence its service life.
The pre-charging device of the middle pressure big-power transducer of the present invention, before middle pressure big-power transducer powers on, in advance
It charges to busbar Support Capacitor, reduces powered on moment and impacted caused by excessive charging current is to front end rectifier equipment.
For using the middle pressure big-power transducer of secondary side Multiple coil rectifier transformer, excessive excitation current can be also prevented
Generation, ensure the safe operation of power grid.
Fig. 3 is for the pre-charging device topological diagram of middle pressure high-power tri-level variable frequency device.
Middle pressure high-power four-quadrant three-level converter based on topological structure shown in FIG. 1 is precharged as now
The pre-charging device of example centering pressure big-power transducer is specifically described.
In the present embodiment, the input voltage 3000VAC of middle pressure high-power four-quadrant three-level converter, rectifier transformer
Device 11 is exported for double winding, and each winding output is 1500VAC；Two Active Front Ends (AFE) are cascaded structure, it is each it is active before
End all corresponds to a dc bus, and after two dc bus series connection, just into the dc bus of frequency converter, junction is three
The neutral point o of electrical level inverter.Inversion side is NPC three-level structures.Frequency converter accessory power supply is 380VAC.
The pre-charging device of middle pressure high-power tri-level variable frequency device is as shown in figure 3, by soft-start module 2, rectifier transformer
3rd, rectification module 4, preliminary filling electric control module 5, contactor 6 are formed.
Preliminary filling electric control module 5 includes programming device and its minimum system, voltage collection circuit, leads in present embodiment
Believe circuit.Preliminary filling electric control module 5 carries out information exchange with frequency converter control system, makes pre-charge process whole visible controllable.
Soft-start module 2 is connect by contactor 6 with low-tension supply, and in the present embodiment, low-tension supply uses
The frequency converter accessory power supply of 380VAC.Soft-start module 2 is used to adjust the input voltage of rectifier transformer 3, make its virtual value by
It is small to change to big, dash current when avoiding charging to dc bus.Including AC voltage adjusting circuit and its driving circuit, exchange is adjusted
Volt circuit is realized that, by adjusting the turn-on instant of power electronic devices, reaching output voltage virtual value can by power electronic devices
The purpose of tune.As thyristor is used in power electronic devices present embodiment, by adjusting the triggering moment of thyristor, reach
Pressure regulation purpose.
Rectifier transformer 3 is three-phase voltage increasing transformer, for input voltage to be boosted to 900VAC.It is adopted in present embodiment
With two identical three-phase voltage increasing transformers, each three-phase voltage increasing transformer is △/△/Y three winding structures, and primary side is
Corner connection, secondary side are two windings, and one connects for star, another winding is corner connection.Two three-phase voltage increasing transformers 3 are closed to be in parallel
System.AC circuit breaker 7 is set between rectifier transformer 3 and soft-start module 2.
Rectification module 4 is three phase full bridge uncontrollable rectifier circuit, and connected two of same rectifier transformer output winding are whole
Current circuit output terminal is connected in series, and forms 12 pulse wave rectifier circuits, to effectively reduce DC side pulsation.Meanwhile second group of rectification
Rectification module that transformer and the rear part connect and first group are parallel relationship, to promote charging rate, device work(used in reduction
Rate.
It also may include N1 rectifier transformer as rectifier transformer 3, wherein N1 is more than or equal to 1；Each rectifier transformer
Secondary side winding quantity is N2, and wherein N2 is more than or equal to 1.Secondary side winding can change connection method or carry out phase shift, be used for
Support multiple pulse rectification circuit.
Fig. 4 is the pre-charging device topological diagram of the middle pressure high-power tri-level variable frequency device with N number of rectifier transformer.Rectification
Module 4 is connected with rectifier transformer secondary side winding, and corresponds, therefore the quantity of rectification module is N1*N2；Rectification module it
Between can be in parallel to expand stream, can also connect to boost.
Pre-charging device is in precharge, by contactor etc. by the dc bus of the rightmost side in Fig. 3+be connected to Fig. 1's
Busbar+, the dc bus 0 of the rightmost side is connected to the neutral point 0 of Fig. 1 in Fig. 3.
The charge step of pre-charging device is as follows：
Step 1, after preliminary filling electric control module 5 receives the enabled instruction that frequency converter control system is sent out, it is closed auxiliary electricity
The contactor 6 of source, while send soft start instruction to soft-start module 2.
Step 2, after soft-start module 2 receives the soft start instruction of preliminary filling electric control module 5, when adjusting the triggering of thyristor
It carves, carries out voltage adjusting.
Fig. 4 is the AC voltage adjusting process schematic of soft-start module 2, wherein, dash area is practical defeated for soft-start module 2
Go out voltage.After regulating circuit, the output voltage virtual value of soft-start module 2 changes from small to big, and avoids middle pressure high-power three
Dash current when the rectification output of level converter charges to busbar Support Capacitor.
Step 3, preliminary filling electric control module 5 is according to sample information, the corresponding DC bus-bar voltages of real time monitoring AFE1 (+with
0), after the voltage on busbar Support Capacitor reaches preset value, the IGBT in the Active Front End AFE1 of top is controlled, according to default song
Line slowly magnetizes to the rectifier transformer of frequency converter 11, while top Active Front End AFE1 output voltages are whole by frequency converter
Convertor transformer 11 senses the input terminal of lower part Active Front End AFE2, and the voltage of top Active Front End AFE1 outputs has by lower part
The anti-paralleled diode of IGBT starts slowly to charge for the dc bus of AFE2 in the front-end A FE2 of source.
Step 4, preliminary filling electric control module 5 detects the busbar voltage of lower part Active Front End AFE2, under according to sample information
After the busbar voltage of portion Active Front End AFE2 reaches preset value, the contactor 6 being connect with accessory power supply winding is disconnected, is terminated
Pre-charge process.After the completion of precharge, frequency convertor system has power-up conditions.
Step 5, the information for being pre-charged completion is transmitted to frequency converter control system by preliminary filling electric control module 5, by frequency converter
Control system control frequency converter powers on.
From the foregoing, it will be observed that the middle pressure big-power transducer pre-charging device of the present invention is on middle pressure high-power tri-level variable frequency device
Before electricity, slowly charged by dc bus of the soft-start module 2 to top Active Front End AFE1, as top Active Front End AFE1
DC bus-bar voltage reach preset value after, further through top Active Front End AFE1 be frequency converter rectifier transformer 11 carry out it is pre-
Excitation after pre-excitation, passes through the dc bus that lower part Active Front End AFE2 is lower part Active Front End AFE2 and is pre-charged.
Middle pressure high-power tri-level variable frequency device just has power-up conditions after precharge, and powering at this moment will not generate
Any impact.The present apparatus takes full advantage of the effect of Active Front End of high-power tri-level variable frequency device itself, only increases limited low
The precharge operation of high-power tri-level variable frequency device is pressed in being realized after voltage device.When not only completely avoiding directly powering on
Dash current, and do not increase the power consumption of high-power tri-level variable frequency device, high voltage connector replaced by using low-voltage device
Frequency converter cost and frequency converter volume are also reduced with power resistor.
It is illustrated, but the middle pressure of the present invention with middle pressure high-power four-quadrant three-level converter in embodiment of above
Big-power transducer pre-charging device is equally applicable to two quadrant frequency converters, as long as at this moment saving step 3.
That is, when if middle pressure high-power tri-level variable frequency device shown in FIG. 1 is two quadrant frequency converter, pre-charging device is pre-
During charging, by contactor etc. by the busbar of the dc bus of the rightmost side in Fig. 3+be connected to Fig. 1+, the direct current of the rightmost side in Fig. 3
Busbar 0 be connected to the busbar of Fig. 1-.
With the present invention pre-charging device to it is shown in Fig. 2 it is middle pressure high-power tri-level variable frequency device into line precharge when, together
Sample by contactor etc. by the busbar of the dc bus of the rightmost side in Fig. 3+be connected to Fig. 2+, the dc bus 0 of the rightmost side in Fig. 3
Be connected to the busbar of Fig. 2-.
Above only one of specific embodiment of the present invention, within the scope of the invention, can to each embodiment into
Row deformation, as being illustrated, but the applicable model of the present invention by taking middle pressure high-power tri-level variable frequency device as an example in present embodiment
It encloses and is not limited to middle pressure high-power tri-level variable frequency device, it is equally applicable for frequency converters such as the middle high-power five-level converters of pressure, this
In a little variations all belong to the scope of protection of the present invention.
Claims (9)
1. a kind of pre-charging device of middle pressure big-power transducer, which is characterized in that including：Soft-start module (2), rectifier transformer
Device (3), rectification module (4) and preliminary filling electric control module (5)；
The input terminal of the soft-start module (2) is connected with low-tension supply, the primary side phase of output terminal and rectifier transformer (3)
Even；The input terminal of the rectification module (4) is connected with the secondary side of rectifier transformer (3), output terminal and middle pressure high-power frequency conversion
The dc bus of device is connected；In soft-start module (2), A.C. contactor (6) is set between low-tension supply.
2. the pre-charging device of a kind of middle pressure big-power transducer according to claim 1, which is characterized in that described soft to open
Dynamic model block (2) includes AC voltage adjusting circuit and its driving circuit.
A kind of 3. pre-charging device of middle pressure big-power transducer according to claim 1, which is characterized in that the rectification
Transformer (3) has boost function, and the pre-charging device includes N1 rectifier transformer, and wherein N1 is more than or equal to 1；It is each whole
Convertor transformer secondary side winding quantity is N2, and wherein N2 is more than or equal to 1.
A kind of 4. pre-charging device of middle pressure big-power transducer according to claim 1, which is characterized in that the rectification
Module (4) by can not control rectifying circuit form, it is used in parallel between rectification module or be used in series.
A kind of 5. pre-charging device of middle pressure big-power transducer according to claim 1, which is characterized in that the preliminary filling
Electric control module (5) includes programming device and its minimum system, voltage collection circuit, telecommunication circuit.
A kind of 6. pre-charging device of middle pressure big-power transducer according to claim 3, which is characterized in that the rectification
Included in module (4) can not control rectifying circuit be connected with the secondary side winding of rectifier transformer (3), and correspond, it is whole
Flow module included can not control rectifying circuit quantity be N1*N2.
7. the pre-charging device of a kind of middle pressure big-power transducer according to claim 1-6, which is characterized in that in described
Big-power transducer is pressed as middle pressure high-power tri-level variable frequency device or the middle high-power five-level converter of pressure.
8. a kind of charging method of the pre-charging device of middle pressure big-power transducer, the precharge of medium pressure big-power transducer
Device is any pre-charging device in claim 1 to 7,
It is characterised in that it includes following steps：
(1) after preliminary filling electric control module (5) receives user's enabled instruction, it is closed the A.C. contactor (6) first, and pass through soft
Starting module (2) realization is soft to open process, charges to the busbar Support Capacitor of frequency converter；
(2) charging situation of the dc bus of big-power transducer is pressed in preliminary filling electric control module (5) detection, busbar voltage reaches
After preset value, in control press big-power transducer switch element, by net side current transformer according to predetermined curve be frequency converter master
Transformer carries out pre-excitation；It is it into line precharge if there is other busbar parts during pre-excitation；
(3) after the completion of detecting precharge, contactor (6) is disconnected, stops described device work.
9. a kind of charging method of the pre-charging device of middle pressure big-power transducer according to claim 8, feature exist
In, if the middle pressure big-power transducer of precharge is two quadrant frequency converters, omission step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711471668.4A CN108199567A (en) | 2017-12-29 | 2017-12-29 | A kind of pre-charging device and method of middle pressure big-power transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711471668.4A CN108199567A (en) | 2017-12-29 | 2017-12-29 | A kind of pre-charging device and method of middle pressure big-power transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108199567A true CN108199567A (en) | 2018-06-22 |
Family
ID=62586364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711471668.4A Pending CN108199567A (en) | 2017-12-29 | 2017-12-29 | A kind of pre-charging device and method of middle pressure big-power transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108199567A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138196A (en) * | 2019-03-28 | 2019-08-16 | 深圳市禾望电气股份有限公司 | A kind of multiple branch circuit energy accumulation current converter direct current soft start control method and system |
| CN113452262A (en) * | 2021-07-05 | 2021-09-28 | 珠海格力电器股份有限公司 | Frequency converter, boost control method thereof and motor |
| CN113472052A (en) * | 2021-06-21 | 2021-10-01 | 深圳市禾望电气股份有限公司 | Pre-charging device and three-level converter |
| CN113644829A (en) * | 2020-04-27 | 2021-11-12 | 台达电子企业管理（上海）有限公司 | Pre-charging method of cascade frequency converter and cascade frequency converter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594159A (en) * | 2012-02-16 | 2012-07-18 | 华为技术有限公司 | Intermediate-voltage concatenated frequency converter, pre-charging method and system |
| CN102820771A (en) * | 2012-08-10 | 2012-12-12 | 深圳市禾望电气有限公司 | Soft start device and soft start method of converter equipment |
| CN203278635U (en) * | 2013-05-14 | 2013-11-06 | 中国船舶重工集团公司第七一二研究所 | Precharging device having pre-magnetizing function |
| CN204615638U (en) * | 2015-03-27 | 2015-09-02 | 深圳市禾望电气股份有限公司 | A kind of the soft of high-voltage cascade frequency converter opens circuit |
| WO2016202844A1 (en) * | 2015-06-15 | 2016-12-22 | TRUMPF Hüttinger GmbH + Co. KG | Redox flow battery system and method for detecting a fault in a bridge circuit of a dc/dc converter of a redox flow battery system |
| CN106877709A (en) * | 2017-03-15 | 2017-06-20 | 中冶华天南京电气工程技术有限公司 | One kind is used for high voltage converter pre-charging device and method |
-
2017
- 2017-12-29 CN CN201711471668.4A patent/CN108199567A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594159A (en) * | 2012-02-16 | 2012-07-18 | 华为技术有限公司 | Intermediate-voltage concatenated frequency converter, pre-charging method and system |
| CN102820771A (en) * | 2012-08-10 | 2012-12-12 | 深圳市禾望电气有限公司 | Soft start device and soft start method of converter equipment |
| CN203278635U (en) * | 2013-05-14 | 2013-11-06 | 中国船舶重工集团公司第七一二研究所 | Precharging device having pre-magnetizing function |
| CN204615638U (en) * | 2015-03-27 | 2015-09-02 | 深圳市禾望电气股份有限公司 | A kind of the soft of high-voltage cascade frequency converter opens circuit |
| WO2016202844A1 (en) * | 2015-06-15 | 2016-12-22 | TRUMPF Hüttinger GmbH + Co. KG | Redox flow battery system and method for detecting a fault in a bridge circuit of a dc/dc converter of a redox flow battery system |
| CN106877709A (en) * | 2017-03-15 | 2017-06-20 | 中冶华天南京电气工程技术有限公司 | One kind is used for high voltage converter pre-charging device and method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138196A (en) * | 2019-03-28 | 2019-08-16 | 深圳市禾望电气股份有限公司 | A kind of multiple branch circuit energy accumulation current converter direct current soft start control method and system |
| CN110138196B (en) * | 2019-03-28 | 2021-02-12 | 深圳市禾望电气股份有限公司 | Direct-current soft start control method and system for multi-branch energy storage converter |
| CN113644829A (en) * | 2020-04-27 | 2021-11-12 | 台达电子企业管理（上海）有限公司 | Pre-charging method of cascade frequency converter and cascade frequency converter |
| CN113472052A (en) * | 2021-06-21 | 2021-10-01 | 深圳市禾望电气股份有限公司 | Pre-charging device and three-level converter |
| CN113452262A (en) * | 2021-07-05 | 2021-09-28 | 珠海格力电器股份有限公司 | Frequency converter, boost control method thereof and motor |
| CN113452262B (en) * | 2021-07-05 | 2022-07-15 | 珠海格力电器股份有限公司 | Frequency converter, boost control method thereof and motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10917023B2 (en) | Power conversion system and method for pre charging DC-Bus capacitors therein | |
| CN108199567A (en) | A kind of pre-charging device and method of middle pressure big-power transducer | |
| US9246399B2 (en) | Power supply system and control method thereof | |
| US20220360184A1 (en) | Energy conversion device, power system and vehicle | |
| KR20090100655A (en) | Multi level inverter | |
| CN104272571A (en) | Power conversion device | |
| US11451091B2 (en) | Converter | |
| US11496053B2 (en) | Power conversion system with dc-bus pre-charge | |
| CN112600455A (en) | Power supply system and solar photovoltaic inverter | |
| CN103475242A (en) | Plasma high frequency high voltage power supply | |
| CN106992535B (en) | Constant current pre-charging method for high-voltage direct-current bus capacitor of electric energy router | |
| JP6670344B2 (en) | DC charging system for electric vehicle batteries | |
| CN105958855A (en) | New-type high-gain quasi-Z-source inverter | |
| CN113580963A (en) | Electric automobile charging system | |
| CN213734669U (en) | Energy conversion device and vehicle | |
| US20220173652A1 (en) | Power conversion system and virtual dc voltage generator circuit | |
| CN205622509U (en) | Rolling stock DC voltage converter with electric energy bidirectional function | |
| US11451137B2 (en) | Method for pre-charging a cascade converter and cascade converter | |
| CN211606396U (en) | Back-up pure sine wave inverter | |
| CN111130198B (en) | Charging system and method for electric automobile | |
| CN110014986B (en) | Distributed single-stage vehicle-mounted charging device and method thereof | |
| CN207926461U (en) | A kind of AC-DC isolated variable circuits for soft of bus capacitor | |
| CN220570331U (en) | Power supply conveying device, power supply conversion device and photovoltaic system | |
| CN104917195A (en) | Static synchronous series compensation device and control method thereof | |
| CN217087775U (en) | BOOST boosting device of motor controller |
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 |
Application publication date: 20180622 |
|
| RJ01 | Rejection of invention patent application after publication |