CN102608385B - Primary side current of transformer acquisition methods and device - Google Patents
Primary side current of transformer acquisition methods and device Download PDFInfo
- Publication number
- CN102608385B CN102608385B CN201210040692.3A CN201210040692A CN102608385B CN 102608385 B CN102608385 B CN 102608385B CN 201210040692 A CN201210040692 A CN 201210040692A CN 102608385 B CN102608385 B CN 102608385B
- Authority
- CN
- China
- Prior art keywords
- transformer
- current
- phase
- phase currents
- organizing
- 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.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The embodiment of the invention discloses a kind of primary side current of transformer acquisition methods and device, relate to current detection technology field, solve in prior art poor reliability when detecting primary side current of transformer, the problem that cost is high.Described method comprises: obtain three phase currents that secondary often organized by transformer; Three phase currents of three phase currents generation transformer primary sides of secondary are often organized according to described transformer.The present invention is applicable to the current detecting in transformer, detects the input current of frequency converter as being applied in the cascade connection type adopting many vice-side winding transformer in (height) voltage frequency changer topological structure.
Description
Technical field
The present invention relates to current detection technology field, particularly relate to a kind of primary side current of transformer acquisition methods and device.
Background technology
At present, the use of transformer is more and more extensive, and the high voltage appearance of grid side is transformed to low-voltage by transformer, and drive motor is customer power supply.
In certain circumstances, know that the primary current of transformer is extremely important, such as, in cascade connection type, (height) voltage frequency changer all needs the primary current of transformer in (height) voltage frequency changer in cascade connection type described in Measurement accuracy in occasions such as four quadrant running, display input current information, input fault detections.The method of the primary current of prior art measuring transformer directly carries out current sample to the phase current of primary current by current detection circuit, and described current detection circuit is generally adopt two or three current sensors.
In the process realizing the embodiment of the present invention, inventor finds that in prior art, at least there are the following problems:
Because the requirement of method to current detection circuit directly carrying out current sample to the phase current of primary current by current detection circuit is higher, cause poor reliability when detecting primary side current of transformer, the problem that cost is high.
Summary of the invention
Embodiments of the invention provide a kind of primary side current of transformer acquisition methods and device, can improve the reliability detecting primary side current of transformer, reduce testing cost.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of primary side current of transformer acquisition methods, comprising:
Obtain three phase currents that secondary often organized by transformer;
Three phase currents of three phase currents generation transformer primary sides of secondary are often organized according to described transformer.
A kind of primary side current of transformer acquisition device, comprising:
Secondary current acquiring unit, often organizes three phase currents of secondary for obtaining transformer;
Primary current generation unit, three phase currents for often organizing secondary according to described transformer generate three phase currents of transformer primary side.
The primary side current of transformer acquisition methods that the embodiment of the present invention provides and device, three phase currents of secondary are often organized by obtaining transformer, thus generate three phase currents of transformer primary side, because described three phase currents often organizing secondary are less, require low to the current class of current detection circuit, thus improve the reliability detecting primary side current of transformer, reduce testing cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The process flow diagram of the primary side current of transformer acquisition methods that Fig. 1 provides for the embodiment of the present invention;
The process flow diagram of the primary side current of transformer acquisition methods that Fig. 2 provides for further embodiment of this invention;
The instantiation that Fig. 3 provides for further embodiment of this invention in (height) voltage frequency changer topological structure, detects the schematic diagram of the instantaneous value often organizing secondary three phase currents in the cascade connection type adopting many vice-side winding transformer;
The structural representation one of the primary side current of transformer acquisition device that Fig. 4 provides for the embodiment of the present invention;
The structural representation two of the primary side current of transformer acquisition device that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
For making the advantage of technical solution of the present invention clearly, below in conjunction with drawings and Examples, the present invention is elaborated.
As shown in Figure 1, the primary side current of transformer acquisition methods that the embodiment of the present invention provides, described method comprises:
Three phase currents of secondary often organized by step 101, acquisition transformer.
Such as, described two or three phase currents often organizing secondary can be detected by current detection circuit, concrete, three phase currents often organizing secondary can be detected by current detection circuit, or two phase currents often organizing secondary are detected by current detection circuit, again because in three-phase three-wire system, three-phase current is added and is zero, thus can obtain another phase current by two phase currents.Current detection circuit can be the testing circuit with current sensor, but is not only confined to this.
Step 102, three phase currents often organizing secondary according to described transformer generate three phase currents of transformer primary sides.
The primary side current of transformer acquisition methods that the embodiment of the present invention provides, three phase currents of secondary are often organized by obtaining transformer, thus generate three phase currents of transformer primary side, because described three phase currents often organizing secondary are less, require low to the current class of current detection circuit, eliminate the current detection circuit on former limit, thus improve the reliability detecting primary side current of transformer, reduce testing cost.
The technical scheme better understood the embodiment of the present invention to make those skilled in the art and provided, will introduce the primary side current of transformer acquisition methods provided in the embodiment of the present invention below further by an instantiation.
Such as in the cascade connection type adopting many vice-side winding transformer, in (height) voltage frequency changer topological structure, there is following scheme:
As shown in Figure 2, the primary side current of transformer acquisition methods that further embodiment of this invention provides, described method comprises:
Step 201, detect transformer by current detection circuit and often organize three phase currents of secondary, to get the instantaneous value that three phase currents of secondary often organized by described transformer.
Concrete, in the cascade connection type of employing many vice-side winding transformer as shown in Figure 3 in (height) voltage frequency changer topological structure, described current detection circuit (such as adopting current sensor) is received transformer respectively often organize on secondary, thus can be detected by current detection circuit and get the instantaneous value that three phase currents of secondary often organized by transformer, such as, with I
kx' representing and to detect and the transformer got often organizes the instantaneous value of three phase currents of secondary, the wherein group number of K indication transformer secondary, x equals a, b or c, and three phases of secondary are often organized in expression, then the instantaneous value of three phase currents detected is respectively I
1a', I
1b', I
1c', I
2a', I
2b', I
2c' ... I
kx'.
Step 202, the instantaneous value of three phase currents described transformer often being organized secondary carry out phase calculation, to get three the secondary current phasing degree often organizing secondary, and generate three primary current phasing degree components of transformer according to described three the secondary current phasing degree often organizing secondary.
Concrete, by the instantaneous value I of three phase currents detected
1a', I
1b', I
1c', I
2a', I
2b', I
2c' ... I
kx' carry out phase calculation, three the secondary current phasing degree often organizing secondary got are with θ
kxrepresent, then three the secondary current phasing degree acquired are θ
1a, θ
1b, θ
1c, θ
2a, θ
2b, θ
2c... θ
kx, in the nameplate parameter of transformer, have the phase shift angle often organizing the relatively former limit of secondary to be θ
kx', then according to described three the secondary current phasing degree θ often organizing secondary
kxand often organize three phase current phase shift angle θ of secondary
kxthree primary current phasing degree components of ' generation transformer are θ
kxin, can be formulated as:
θ
1ain＝θ
1a-θ
1a′；
θ
1bin＝θ
1b-θ
1b′；
θ
1cin＝θ
1c-θ
1c′；
θ
2ain＝θ
2a-θ
2a′；
θ
Kxin＝θ
Kx-θ
Kx′。
Step 203, the instantaneous value described transformer often being organized three phase currents of secondary carry out the calculating of space vector amplitude, to get three the phase current space vector amplitudes often organizing secondary, and generate the component of three phase current space vector amplitudes of transformer primary side according to described three the phase current space vector amplitudes often organizing secondary.
Concrete, the instantaneous value I of three phase voltages of secondary is often organized according to described transformer
kx' carry out the calculating of space vector amplitude, three the phase current space vector amplitudes often organizing secondary of acquisition are with I
kxrepresent, then three the phase current space vector amplitudes often organizing secondary got are respectively I
1a, I
1b, I
1c, I
2a, I
b2, I
c2... I
kx, in the nameplate parameter of transformer, have transformer primary side to the turn ratio N often organizing secondary
k, then according to described three the phase current space vector amplitude I often organizing secondary
kxand transformer primary side is to the turn ratio N often organizing secondary
kthe component generating three phase current space vector amplitudes of transformer primary side is I
kxin, can be formulated as:
I
1ain＝I
1a/N
1；
I
1bin＝I
1b/N
1；
I
1cin＝I
1c/N
1；
I
2ain＝I
2a/N
2；
I
Kxin＝I
Kx/N
K。
Step 204, obtain three phase currents of transformer primary side according to the component of three primary current phasing degree components of described transformer and three phase current space vector amplitudes of described transformer primary side.
Concrete, according to three primary current phasing degree component θ of described transformer
kxinand the component I of three of described transformer primary side phase current space vector amplitudes
kxin, calculate primary current component I
kxin', then by described each primary current component I
kxin' be added three phase currents obtaining transformer primary side, with I
a, I
band I
crepresent, can be formulated as:
I
a＝I
1ain′+I
1bin′+I
1cin′+I
2ain′......+I
Kxin′＝I
1ain∠θ
1ain+I
1bin∠θ
1bin+I
1cin∠θ
1cin+I
2ain∠θ
2ain+......+I
Kxin∠θ
Kxin。
Wherein, ∠ θ
kxinrepresent θ
kxinsine value.
The primary side current of transformer acquisition methods that further embodiment of this invention provides, three phase currents of secondary are often organized by obtaining transformer, thus generate three phase currents of transformer primary side, because described three phase currents often organizing secondary are less, require low to the current class of current detection circuit, eliminate the current detection circuit on former limit, thus improve the reliability detecting primary side current of transformer, reduce testing cost.
As shown in Figure 4, a kind of primary side current of transformer acquisition device that the embodiment of the present invention provides, comprising:
Secondary current acquiring unit 31, often organizes two or three phase currents of secondary for obtaining transformer.Its specific implementation, see in Fig. 1 shown in step 101, repeats no more herein.
Primary current generation unit 32, three phase currents for often organizing secondary according to described transformer generate three phase currents of transformer primary side.Its specific implementation, see in Fig. 1 shown in step 102, repeats no more herein.
Further, as shown in Figure 5, described secondary current acquiring unit 31, comprising:
Secondary current detection module 311, for detecting by current detection circuit three phase currents that secondary often organized by transformer.Its specific implementation, see in Fig. 2 shown in step 201, repeats no more herein.
Secondary current acquisition module 312, often organizes three phase currents of secondary for getting described transformer.Its specific implementation, see in Fig. 2 shown in step 201, repeats no more herein.
Further, as shown in Figure 5, described primary current generation unit 32, comprising:
First generation module 321, obtains for three phase currents often organizing secondary according to described transformer three the secondary current phasing degree often organizing secondary, and generates three primary current phasing degree of transformer according to described three the secondary current phasing degree often organizing secondary.Its specific implementation, see in Fig. 2 shown in step 202, repeats no more herein.
Second generation module 322, three phase currents for often organizing secondary according to described transformer obtain three the phase current space vector amplitudes often organizing secondary, and generate three phase current space vector amplitudes of transformer primary side according to described three the phase current space vector amplitudes often organizing secondary.Its specific implementation, see in Fig. 2 shown in step 203, repeats no more herein.
Primary current generation module 323, for three phase current space vector amplitudes according to described three primary current phasing degree, described former limit, generates three phase currents of transformer primary side.Its specific implementation, see in Fig. 2 shown in step 204, repeats no more herein.
Further, as shown in Figure 5, described first generation module 321, comprising:
Phase calculation submodule 3211, carries out phase calculation for three phase currents described transformer often being organized secondary.Its specific implementation, see in Fig. 2 shown in step 202, repeats no more herein.
First obtains submodule 3212, for obtaining three the secondary current phasing degree often organizing secondary.Its specific implementation, see in Fig. 2 shown in step 202, repeats no more herein.
Further, as shown in Figure 5, described second generation module 322, comprising:
Crest meter operator module 3221, carries out the calculating of space vector amplitude for three phase currents described transformer often being organized secondary.Its specific implementation, see in Fig. 2 shown in step 203, repeats no more herein.
Second obtains submodule 3222, for obtaining three the phase current space vector amplitudes often organizing secondary.Its specific implementation, see in Fig. 2 shown in step 203, repeats no more herein.
The primary side current of transformer acquisition device that the embodiment of the present invention provides, three phase currents that secondary often organized by transformer are obtained by secondary current acquiring unit, thus three phase currents of transformer primary side are generated by primary current generation unit, because described three phase currents often organizing secondary are less, require low to the current class of current detection circuit, eliminate the current detection circuit on former limit, thus improve the reliability detecting primary side current of transformer, reduce testing cost.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required common hardware by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better embodiment.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in the storage medium that can read, as the floppy disk of computing machine, hard disk or CD etc., comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (8)
1. a primary side current of transformer acquisition methods, is characterized in that, comprising:
Obtain three phase currents that secondary often organized by transformer;
Three phase currents of three phase currents generation transformer primary sides of secondary are often organized according to described transformer;
Described three phase currents often organizing three phase currents generation transformer primary sides of secondary according to described transformer, comprising:
Three phase currents often organizing secondary according to described transformer obtain three the secondary current phasing degree often organizing secondary, the phase shift angle on the relatively former limit of secondary is often organized by the nameplate parameter acquiring transformer of described transformer, and three primary current phasing degree components of transformer are generated according to described three the secondary current phasing degree often organizing secondary, primary current phasing degree component equals the phase shift angle that secondary current phasing degree deducts the relatively former limit of secondary;
Three phase currents often organizing secondary according to described transformer obtain the space vector amplitude often organizing three phase currents of secondary, by the nameplate parameter acquiring transformer primary side of described transformer to the turn ratio often organizing secondary, and the component of three phase current space vector amplitudes of transformer primary side is generated according to described three the phase current space vector amplitudes often organizing secondary, the component of the phase current space vector amplitude on former limit equals the phase current vector magnitude of secondary divided by the turn ratio of former limit to secondary;
According to the component of three phase current space vector amplitudes on described three primary current phasing degree components, described former limit, generate three phase currents of transformer primary side.
2. method according to claim 1, is characterized in that, three phase currents of secondary often organized by described acquisition transformer, comprising:
Two or three phase currents that secondary often organized by transformer are detected, to get three phase currents that secondary often organized by described transformer by current detection circuit.
3. method according to claim 1, is characterized in that, described three phase currents often organizing secondary according to described transformer obtain three the secondary current phasing degree often organizing secondary, comprising:
Three phase currents described transformer often being organized secondary carry out phase calculation, to get three the secondary current phasing degree often organizing secondary.
4. method according to claim 1, is characterized in that, described three phase currents often organizing secondary according to described transformer obtain the space vector amplitude often organizing three phase currents of secondary, comprising:
Three phase currents described transformer often being organized secondary carry out the calculating of space vector amplitude, to get three the phase current space vector amplitudes often organizing secondary.
5. a primary side current of transformer acquisition device, is characterized in that, comprising:
Secondary current acquiring unit, often organizes three phase currents of secondary for obtaining transformer;
Primary current generation unit, three phase currents for often organizing secondary according to described transformer generate three phase currents of transformer primary side;
Described primary current generation unit, comprising:
First generation module, three phase currents for often organizing secondary according to described transformer obtain three the secondary current phasing degree often organizing secondary, the phase shift angle on the relatively former limit of secondary is often organized by the nameplate parameter acquiring transformer of described transformer, and three primary current phasing degree components of transformer are generated according to described three the secondary current phasing degree often organizing secondary, primary current phasing degree component equals the phase shift angle that secondary current phasing degree deducts the relatively former limit of secondary;
Second generation module, three phase currents for often organizing secondary according to described transformer obtain three the phase current space vector amplitudes often organizing secondary, by the nameplate parameter acquiring transformer primary side of described transformer to the turn ratio often organizing secondary, and the component of three phase current space vector amplitudes of transformer primary side is generated according to described three the phase current space vector amplitudes often organizing secondary, the component of the phase current space vector amplitude on former limit equals the phase current vector magnitude of secondary divided by the turn ratio of former limit to secondary;
Primary current generation module, for the component of three phase current space vector amplitudes according to described three primary current phasing degree components, described former limit, generates three phase currents of transformer primary side.
6. device according to claim 5, is characterized in that, described secondary current acquiring unit, comprising:
Secondary current detection module, for detecting by current detection circuit two or three phase currents that secondary often organized by transformer;
Secondary current acquisition module, often organizes three phase currents of secondary for getting described transformer.
7. device according to claim 6, is characterized in that, described first generation module, comprising:
Phase calculation submodule, carries out phase calculation for three phase currents described transformer often being organized secondary;
First obtains submodule, for obtaining three the secondary current phasing degree often organizing secondary.
8. device according to claim 6, is characterized in that, described second generation module, comprising:
Crest meter operator module, carries out the calculating of space vector amplitude for three phase currents described transformer often being organized secondary;
Second obtains submodule, for obtaining three the phase current space vector amplitudes often organizing secondary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210040692.3A CN102608385B (en) | 2012-02-22 | 2012-02-22 | Primary side current of transformer acquisition methods and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210040692.3A CN102608385B (en) | 2012-02-22 | 2012-02-22 | Primary side current of transformer acquisition methods and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102608385A CN102608385A (en) | 2012-07-25 |
| CN102608385B true CN102608385B (en) | 2015-09-09 |
Family
ID=46525914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210040692.3A Active CN102608385B (en) | 2012-02-22 | 2012-02-22 | Primary side current of transformer acquisition methods and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102608385B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763082B (en) * | 2014-12-18 | 2018-05-29 | 中车大连电力牵引研发中心有限公司 | The selection method and device of power switch pipe based on vehicle-mounted AuCT |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1816749A (en) * | 2003-07-01 | 2006-08-09 | 伊特伦电学计量公司 | System and method for acquiring voltages and measuring voltage into an electrical service using a non-active current transformer |
| CN101788629A (en) * | 2009-07-23 | 2010-07-28 | 西安爱邦电气有限公司 | Connection analysis method for conventional transformer relaying CT circuit in electric system |
| CN102053203A (en) * | 2010-11-04 | 2011-05-11 | 武汉国测恒通智能仪器有限公司 | Detection method and device for high-voltage power quality |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006180596A (en) * | 2004-12-21 | 2006-07-06 | Yaskawa Electric Corp | Method of detecting unit input voltage of multiple three-phase power conversion equipment, and unit input voltage detector |
-
2012
- 2012-02-22 CN CN201210040692.3A patent/CN102608385B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1816749A (en) * | 2003-07-01 | 2006-08-09 | 伊特伦电学计量公司 | System and method for acquiring voltages and measuring voltage into an electrical service using a non-active current transformer |
| CN101788629A (en) * | 2009-07-23 | 2010-07-28 | 西安爱邦电气有限公司 | Connection analysis method for conventional transformer relaying CT circuit in electric system |
| CN102053203A (en) * | 2010-11-04 | 2011-05-11 | 武汉国测恒通智能仪器有限公司 | Detection method and device for high-voltage power quality |
Non-Patent Citations (1)
| Title |
|---|
| 由负载变压器原边侧电压计算付边侧电压;陆国庆;《高电压技术》;19860228(第2期);第55-58页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102608385A (en) | 2012-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ullah et al. | A comprehensive review of winding short circuit fault and irreversible demagnetization fault detection in PM type machines | |
| CN105227027B (en) | Device and method for compensating the location error of rotary transformer | |
| JP5569465B2 (en) | Abnormality diagnosis device for amplitude modulation device | |
| JP5523584B2 (en) | Inductance measuring apparatus and measuring method for synchronous motor | |
| Wang et al. | A resolver-to-digital conversion method based on third-order rational fraction polynomial approximation for PMSM control | |
| CN110943670B (en) | Motor rotor position obtaining method and system | |
| CN203219237U (en) | Zero checker | |
| CN106326608A (en) | Sine and cosine modulating signal model for simulating rotary transformation motor | |
| CN105048921A (en) | Phase current measurement diagnostic | |
| CN109738778B (en) | Inverter open circuit diagnosis method and device, terminal equipment and computer readable medium | |
| US10345357B2 (en) | Fault detection in variable differential transformer sensors based on zero-crossings of signals | |
| CN112255461B (en) | Multi-domain broadband impedance measurement method for modularized multi-level converter | |
| JP6005409B2 (en) | Redundant resolver device | |
| CN102539891B (en) | Method and device for acquiring primary voltage of transformer | |
| CN104682721B (en) | Apparatus and method for controlling inverter | |
| CN102608385B (en) | Primary side current of transformer acquisition methods and device | |
| CN112985727A (en) | Control method, control system, medium and equipment of linear vibration table | |
| KR20130004657A (en) | Apparatus and method for fault diagnosis of switching device in neutral point clamped inverter system | |
| JP2006138778A (en) | Angle detector | |
| CN109164342B (en) | Method and device for diagnosing open-circuit fault of three-phase inverter and electronic equipment | |
| KR101012740B1 (en) | Resolver digital converter and position detecting apparatus | |
| JP6454965B2 (en) | Rotation angle detection device and method for detecting abnormality of rotation angle detection device | |
| Nguyen et al. | Sensor fault diagnosis technique applied to three-phase induction motor drive | |
| JP5887110B2 (en) | Power measurement device, inverter control circuit, grid-connected inverter system, and power measurement method | |
| US9863986B2 (en) | Electric power measuring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211110 Address after: 518043 No. 01, 39th floor, building a, antuoshan headquarters building, No. 33, antuoshan Sixth Road, Xiang'an community, Xiangmihu street, Futian District, Shenzhen, Guangdong Province Patentee after: Huawei Digital Energy Technology Co., Ltd Address before: 518129 Huawei headquarters office building, Bantian, Longgang District, Shenzhen, Guangdong Patentee before: Huawei Technology Co., Ltd |
|
| TR01 | Transfer of patent right |