CN208112243U - Three-phase unbalanced phase-changing device - Google Patents
Three-phase unbalanced phase-changing device Download PDFInfo
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- CN208112243U CN208112243U CN201820656088.6U CN201820656088U CN208112243U CN 208112243 U CN208112243 U CN 208112243U CN 201820656088 U CN201820656088 U CN 201820656088U CN 208112243 U CN208112243 U CN 208112243U
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- 230000003321 amplification Effects 0.000 claims description 15
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 230000003068 static effect Effects 0.000 claims description 7
- 238000010891 electric arc Methods 0.000 claims description 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
- 240000002853 Nelumbo nucifera Species 0.000 claims 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 description 12
- 230000000875 corresponding effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model discloses an unbalanced three phase commutation device, include: the device comprises a current acquisition unit, a main control unit, a driving unit, a thyristor unit and a switch assembly; the current acquisition unit is connected with each phase of the three phases and the main control unit; the main control unit is connected with the driving unit; the thyristor unit is connected with each phase of the three phases and the single-phase load, and the control end of the thyristor unit is connected with the driving unit, wherein the thyristor unit comprises 3 thyristors, and each thyristor is connected with each phase of the three phases in a one-to-one correspondence manner; the switching assembly is connected to each phase of three phases and a single-phase load, wherein the switching assembly comprises 3 phase change switches, each phase change switch comprises a mechanical switch and a release, and the release is connected with the mechanical switch. The utility model discloses can realize that the unbalanced monitoring of three-phase and the commutation switch that constitutes through mechanical switch and release carries out automatic commutation, reach the quick commutation of not falling the electricity of single-phase load.
Description
Technical field
The utility model relates to three-phase distribution technical field more particularly to a kind of three-phase imbalance commutation devices.
Background technique
In Distribution network system, there are a large amount of single-phase, asymmetric, non-linear, impact loads, due to early stage
Electrical reticulation design is planned inconsiderate, it may appear that the case where a large amount of single-phase loads concentrate on single-phase or two-phase, these unbalanced load meetings
So that distribution system is generated three-phase imbalance, leads to the imbalance of power supply system three-phase voltage, electric current.
Three-phase load unbalance will increase grid loss, seriously affect power supply quality, it is common practice that pass through manual switching
The power supply of single-phase load mutually adjusts three-phase equilibrium, but this mode needs first to operate load power failure again, this serious shadow
The power supply reliability to user has been rung, challenge is proposed to the quality supply of power grid.Therefore, Distribution network and rural power grids
Three-phase imbalance problem has become urgent problem to be solved in current power distribution systems.
Utility model content
In view of the above problems, the utility model proposes a kind of three-phase imbalance commutation devices, for detecting three-phase imbalance
Situation simultaneously carries out commutation using phase-change switch and thyristor, to solve to complete switching route in the case where single-phase load not power down
The problem of.
The utility model proposes a kind of three-phase imbalance commutation device, including：Current acquisition unit, main control unit, drive
Moving cell, thyristor cell and switch block；
Each phase of the current acquisition unit connection three-phase and the main control unit；
The main control unit connects the driving unit；
The thyristor cell is connected to each phase and single-phase load of the three-phase, and it is single that control terminal connects the driving
Member, wherein the thyristor cell includes 3 thyristors, each mutually company of one-to-one correspondence of each thyristor and the three-phase
It connects；
The switch block is connected to each phase and single-phase load of the three-phase, wherein the switch block includes 3 and changes
It mutually switchs, each phase-change switch includes mechanical switch and buckle releaser, and the buckle releaser connects the mechanical switch and the master control
Unit.
Optionally, the three-phase imbalance commutation device of the utility model further includes：Timing trigger unit, the clocked flip
Unit is connect with the current acquisition unit, and the current acquisition unit is triggered for regularly sending current acquisition signal and is carried out
Timing acquiring.
Optionally, the three-phase imbalance commutation device of the utility model further includes：Protection location, the protection location and institute
It states switch block to connect with the single-phase load, for protecting the single-phase load when short circuit or overcurrent occur for route
Shield.
Optionally, the current acquisition unit includes：Current transformer, amplification treatment circuit and analog to digital conversion circuit, institute
It states current transformer, the amplification treatment circuit and analog-digital conversion circuit as described to be sequentially connected, for acquiring the real-time electricity of three-phase
Stream.
Optionally, the amplification treatment circuit includes：Signal amplifier, low-pass filter and inverting integrator, the letter
Number amplifier, the low-pass filter and the inverting integrator are sequentially connected, corresponding for carrying out to collected signal
Conditioning.
Optionally, the phase-change switch further includes arc-control device, for eliminating the mechanical switch when being opened or closed
The electric arc of generation.
Optionally, the mechanical switch includes moving contact and static contact, and each phase of three-phase passes through moving contact described in one group
It realizes with the static contact and is turned on or off with the single-phase load.
Optionally, the buckle releaser uses shunt release or magnetictrip.
Optionally, the main control unit includes：Microprocessor, logical-arithmetic unit and comparator, the logical-arithmetic unit and
The comparator is connect with the microprocessor.
Optionally, the microprocessor uses arm processor.
A kind of three-phase imbalance commutation device provided by the utility model has following beneficial effect：
The utility model may be implemented to realize monitoring three-phase imbalance situation in the case where three-phase imbalance and pass through machinery
The phase-change switch that switch and buckle releaser are constituted carries out commutation, and the not power down for reaching single-phase load is switched fast.
Detailed description of the invention
It, below will be to attached drawing needed in the embodiment in order to illustrate more clearly of the technical solution of the utility model
It is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore is not construed as
Restriction to scope of protection of the utility model.For those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is the application schematic diagram of the three-phase imbalance commutation device of the utility model embodiment；
Fig. 2 is the structural schematic diagram of the three-phase imbalance commutation device of the utility model embodiment；
Fig. 3 is the structural schematic diagram of the thyristor cell of the three-phase imbalance commutation device of the utility model embodiment.
Fig. 4 is the structural schematic diagram of the switch block of the three-phase imbalance commutation device of the utility model embodiment；
Fig. 5 is the structural schematic diagram of the current acquisition unit of the three-phase imbalance commutation device of the utility model embodiment；
Fig. 6 is that the three-phase current of the utility model embodiment acquires the amplification treatment circuit of commutation system；
Fig. 7 is another structural schematic diagram of the three-phase imbalance commutation device of the utility model embodiment.
Main element symbol description：
Three-phase imbalance commutation device -10；Current acquisition unit -100；- 110 amplification treatment circuit of current transformer-
120；Analog to digital conversion circuit -130；Main control unit -200；Driving unit -300；Thyristor cell -400；Switch block -500；It changes
Mutually switch -510；Timing trigger unit -90；Protection location -600.
Specific embodiment
Hereinafter, the various embodiments of the disclosure will be described more fully.The disclosure can have various embodiments, and
It can adjust and change wherein.It should be understood, however, that：There is no disclosure protection scope is limited to specific reality disclosed herein
The intention of example is applied, but the disclosure should be interpreted as to all in the spirit and scope for covering the various embodiments for falling into the disclosure
Adjustment, equivalent and/or optinal plan.
Hereinafter, can the term " includes " used in the various embodiments of the disclosure or " may include " instruction disclosed in
Function, operation or the presence of element, and do not limit the increase of one or more functions, operation or element.In addition, such as existing
Used in the various embodiments of the disclosure, term " includes ", " having " and its cognate are meant only to indicate special characteristic, number
Word, step, operation, the combination of element, component or aforementioned item, and be understood not to exclude first one or more other
Feature, number, step, operation, element, component or aforementioned item combined presence or increase one or more features, number,
Step, operation, element, component or aforementioned item combination a possibility that.
In the various embodiments of the disclosure, statement " at least one of A or/and B " includes the text listed file names with
Any combination or all combinations.For example, statement " A or B " or " at least one of A or/and B " may include A, may include B or can
Including A and B both.
The statement (" first ", " second " etc.) used in the various embodiments of the disclosure can be modified in various implementations
Various constituent element in example, but respective sets can not be limited into element.For example, the above statement is not intended to limit the suitable of the element
Sequence and/or importance.The above statement is only used for the purpose for differentiating an element and other elements.For example, the first user fills
It sets and indicates different user device with second user device, although the two is all user apparatus.For example, not departing from each of the disclosure
In the case where the range of kind embodiment, first element is referred to alternatively as second element, and similarly, second element is also referred to as first
Element.
It should be noted that：If a constituent element ' attach ' to another constituent element by description,
First constituent element can be then directly connected to the second constituent element, and can be in the first constituent element and second group
At " connection " third constituent element between element.On the contrary, when a constituent element " being directly connected to " is arrived another constituent element
When, it will be appreciated that for third constituent element is not present between the first constituent element and the second constituent element.
The term used in the various embodiments of the disclosure " user " can be indicated using the people of electronic device or using electricity
The device (for example, artificial intelligence electronic device) of sub-device.
The term used in the various embodiments of the disclosure is used only for the purpose of describing specific embodiments and not anticipates
In the various embodiments of the limitation disclosure.Unless otherwise defined, otherwise all terms used herein (including technical term and
Scientific term) there is contain identical with the various normally understood meanings of embodiment one skilled in the art of the disclosure
Justice.The term (term such as limited in the dictionary generally used) be to be interpreted as have in the related technical field
The identical meaning of situational meaning and Utopian meaning or meaning too formal will be interpreted as having, unless this
It is clearly defined in disclosed various embodiments.
With reference to the accompanying drawing, it elaborates to specific embodiment of the present utility model.
Referring to Fig.1, the utility model provides a kind of three-phase imbalance commutation device, can be used for the 380V/ of three-phase four-wire system
220V low-voltage distribution system, the case where being able to detect three-phase imbalance, simultaneously pass through thyristor and switching group according to default commutation rule
Part etc. automatically adjusts the line attachment of single-phase load, and traditional dependence is overcome manually to relocate to carry out three-phase equilibrium adjustment
Problem.
Referring to a kind of three-phase imbalance commutation device 10 that Fig. 2, the present embodiment are proposed, including：Current acquisition unit 100,
Main control unit 200, driving unit 300, thyristor cell 400 and switch block 500.
Each phase of the input terminal connection three-phase of current acquisition unit 100, output end connect main control unit 200.
The input terminal of driving unit 300 connects main control unit 200, and output end is separately connected thyristor cell 400 and opens
Close the control terminal of component 500.
Referring to Fig. 3, the input terminal of thyristor cell 400 is connected to each phase of three-phase, and output end is connected to single-phase load,
Its control terminal connects driving unit 300.Wherein, thyristor cell 400 includes 3 thyristors, each thyristor and three-phase it is each
Mutually connect one to one.
Referring to Fig. 4, switch block 500 is connected to each phase and single-phase load of three-phase, wherein switch block 500 includes 3
Phase-change switch 510.Each phase-change switch 510 includes mechanical switch and buckle releaser, and buckle releaser connects mechanical switch and main control unit
200, and mechanical switch connects each phase and single-phase load.
Specifically, current acquisition unit 100 is used to detect the real-time current of each phase of three-phase.Preferably, referring to Fig. 5, electricity
Flowing acquisition unit 100 may include current transformer 110, amplification treatment circuit 120 and analog to digital conversion circuit 130.Current transformer
The signal of acquisition is accessed amplification treatment circuit 120 by 110 after sampling resistor is converted into voltage signal, and passes through enhanced processing
Circuit 120 carries out corresponding signal amplification and filtering processing etc., then is converted the analog signal of acquisition by analog to digital conversion circuit 130
For digital signal and it is sent into main control unit 200.Amplification treatment circuit 120 specifically may include signal amplifier, low-pass filter and
Inverting integrator etc. is respectively used to carry out collected small signal the processing such as signal amplification, filtering and reverse phase integral, to make
The analog signal of output is more accurate, reliable.
Referring to Fig. 6, amplification treatment circuit 120 may include signal amplifier, low-pass filter and inverting integrator, use respectively
It handles to obtain more accurately acquiring in carrying out signal amplification, filtering and reverse phase integral etc. to collected Small Current Signal
As a result.Signal amplifier includes first resistor R1, second resistance R2,3rd resistor R3 and the first difference amplifier U1, through overcurrent
The voltage signal that mutual inductor 110 and sampling resistor obtain passes through the non-inverting input terminal phase of first resistor R1 and the first difference amplifier U1
Even, the inverting input terminal of the first difference amplifier U1 is grounded by second resistance R2, and output end connects by 3rd resistor R3 feedback
Its inverting input terminal is connect, the output end of the first difference amplifier U1 is the output end of the amplifier.Low-pass filter includes the 4th
Resistance R4 and filter capacitor C1, and inverting integrator includes the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, integrating capacitor
C2 and the second difference amplifier U2.The output end of first difference amplifier U1 is poor by the 4th resistance R4 and the 5th resistance R5 connection second
Partite transport puts the inverting input terminal of U2, and one end of filter capacitor C1 connects the 4th resistance R4 and the 5th resistance R5, other end ground connection.
The non-inverting input terminal of second difference amplifier U2 by the 6th resistance R6 be grounded, output end by the 7th resistance R7 feedback link its
Non-inverting input terminal, and integrating capacitor C2 is then connected in parallel with the 7th resistance R7, the output end of the second difference amplifier U2 is to amplify
The output end of processing circuit 120.
The acquisition signal after conditioning is then converted into digital signal by analog to digital conversion circuit 130 and is sent into main control unit
200, it is finally handled by main control unit 200 and obtains the real-time current of corresponding phase line.Preferably, the analog-to-digital conversion electricity in the present embodiment
A/D converter in road 130 completes analog-to-digital conversion, conversion accuracy and conversion time using the conversion chip of successive approximation
Acquisition can generally be reached to require, such as 8 ADC0809.
Main control unit 200 is used to calculate tri-phase unbalance factor simultaneously according to the collected real-time current of current acquisition unit 100
Judge whether obtained tri-phase unbalance factor is more than preset threshold.It is main when obtained tri-phase unbalance factor is more than preset threshold
Control unit 200 then sends corresponding commutation order to driving circuit 300 and by driving circuit 300 according to preset commutation rule
Drive control thyristor cell 400 and switch block 500 operate to complete corresponding commutation.Wherein, the default commutation rule
Can self-defining according to actual needs, the commutation rule in the present embodiment is to switch the single-phase load in the biggish phase line of electric current
Onto the lesser phase line of electric current.Wherein, main control unit 200 may include microprocessor, logical-arithmetic unit and comparator.Logical operation
Device is used to compare tri-phase unbalance factor and preset threshold etc. for calculating the related datas such as tri-phase unbalance factor, comparator, and micro-
Processor then sends corresponding control command or commutation order according to the correlated results of the logical-arithmetic unit and comparator.It is optional
Ground, the microprocessor use arm processor.Arm processor have small in size, low-power consumption, low cost, instruction execution speed fast and
The features such as execution efficiency is high.
Driving unit 300 is used to drive thyristor cell 400 according to the corresponding commutation order that main control unit 200 is sent
In each thyristor be turned on and off.Specifically, triode or integrated chip can be used to be turned on and off in driving unit 300
Thyristor.
Thyristor cell 400 and switch block 500 are for completing the switching of phase line in the case where single-phase load does not power off.
Thyristor cell 400 is used to provide temporary electric current for single-phase load during phase-change switch 510 switches phase line, to make list
Phase load not power down in commutation process.Switch block 500 is used to be applied according to the control command of main control unit 200 to buckle releaser
Corresponding electric signal is to make buckle releaser driving mechanical switch carry out closing or opening to complete the phase line switching of single-phase load.Its
In, which can be used shunt release or magnetictrip and controls its on-off electric switch by main control unit 200.The machine
Tool switch includes moving contact and static contact, and each phase of three-phase is realized by one group of moving contact and static contact and led with single-phase load
On-off is opened, wherein the contact of such as knife contact or dock contact different structure can be used in the dynamic/static contact.Specifically,
Assuming that having judged that three-phase uneven situation occurs and needs single-phase load being switched to B phase by the C phase being currently located, then by C phase
Pilot thyristor it is logical, the mechanical switch for connecting C phase is disconnected from C phase after its conducting.When the mechanical switch of C phase disconnects
Afterwards, then then the mechanical switch of B phase and B phase are closed by the thyristor shutdown of C phase and simultaneously by the turn on thyristors of B phase,
Then the thyristor of B phase is turned off again, then completes the commutation of single-phase load.Preferably, phase-change switch 510 may be equipped with phase
The arc-control device answered for eliminating mechanical switch issuable electric arc when closed or opened, such as using vacuum arc-extinguishing device or
Increase corresponding arc-extinguish chamber etc., to improve the service life of mechanical switch.
Optionally, referring to Fig. 7, a kind of three-phase imbalance commutation device 10 that the embodiments of the present invention propose can be with
Including：Timing trigger unit 90, timing trigger unit 90 is connect with current acquisition unit 100, for regularly sending current acquisition
Signal is timed acquisition with trigger current acquisition unit 100.Specifically, timing trigger unit 90 may include timer and triggering
Device.
Optionally, a kind of three-phase imbalance commutation device 10 of the embodiments of the present invention proposition can also include：It protects
Unit 600 is protected, protection location 600 connects single-phase load and switch block 500, is used for when short circuit or overcurrent occur for phase line to list
Phase load is protected.
Detection and the list of three-phase imbalance may be implemented in a kind of three-phase imbalance commutation device proposed through this embodiment
Phase load does not power off commutation, by the easily-controllable and oncontacting dot characteristics using thyristor, makes thyristor work in switching moment
Play the role of in the process inhibition shove, over-voltage and arcing；Simultaneously also using the phase-change switch by mechanical switch in conjunction with buckle releaser
To realize fast and reliable closure.In addition, the mechanical switch in the present apparatus has compared with the phase-change switch of some electronic switches
Low cost.The characteristics of low fever, can reduce the problems such as generating heat using electronic switch bring, to further decrease the function of device
Consumption.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Process is not necessarily implemented necessary to the utility model.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Above-mentioned the utility model serial number is for illustration only, does not represent the superiority and inferiority of implement scene.Disclosed above is only this
Several specific implementation scenes of utility model, still, the utility model is not limited to this, any those skilled in the art's energy
Think of variation should all fall into the protection scope of the utility model.
Claims (10)
1. a kind of three-phase imbalance commutation device, which is characterized in that including：Current acquisition unit, main control unit, driving unit,
Thyristor cell and switch block；
Each phase of the current acquisition unit connection three-phase and the main control unit；
The main control unit connects the driving unit；
The thyristor cell is connected to each phase of the three-phase and single-phase load, control terminal connect the driving unit,
In, the thyristor cell includes 3 thyristors, and each thyristor respectively mutually connects one to one with three-phase；
The switch block is connected to each phase and single-phase load of the three-phase, wherein the switch block includes that 3 commutations are opened
It closes, each phase-change switch includes mechanical switch and buckle releaser, and the buckle releaser connects the mechanical switch and the main control unit.
2. three-phase imbalance commutation device according to claim 1, which is characterized in that further include：Timing trigger unit, institute
It states timing trigger unit to connect with the current acquisition unit, be adopted for regularly sending current acquisition signal with triggering the electric current
Collection unit is timed acquisition.
3. three-phase imbalance commutation device according to claim 1, which is characterized in that further include：Protection location, the guarantor
Shield unit is connect with the switch block and the single-phase load, is used for when short circuit or overcurrent occur for route to described single-phase negative
Lotus is protected.
4. three-phase imbalance commutation device according to claim 1, which is characterized in that the current acquisition unit includes：
Current transformer, amplification treatment circuit and analog to digital conversion circuit, the current transformer, the amplification treatment circuit and the mould
Number conversion circuit is sequentially connected, for acquiring the real-time current of three-phase.
5. three-phase imbalance commutation device according to claim 4, which is characterized in that the amplification treatment circuit includes：
Signal amplifier, low-pass filter and inverting integrator, the signal amplifier, the low-pass filter and reverse phase integral
Device is sequentially connected, for being improved accordingly collected signal.
6. three-phase imbalance commutation device according to claim 1, which is characterized in that the phase-change switch further includes arc extinguishing
Device, the electric arc generated for eliminating the mechanical switch when being opened or closed.
7. three-phase imbalance commutation device according to claim 1, which is characterized in that the mechanical switch includes moving contact
And static contact, each phase of three-phase by moving contact and the static contact described in one group realize conducting with the single-phase load or
It disconnects.
8. three-phase imbalance commutation device according to claim 1, which is characterized in that the buckle releaser uses shunted exciter tripping
Device or magnetictrip.
9. three-phase imbalance commutation device according to claim 1, which is characterized in that the main control unit includes：Micro- place
Reason device, logical-arithmetic unit and comparator, the logical-arithmetic unit and the comparator are connect with the microprocessor.
10. three-phase imbalance commutation device according to claim 9, which is characterized in that the microprocessor is using at ARM
Manage device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820656088.6U CN208112243U (en) | 2018-05-03 | 2018-05-03 | Three-phase unbalanced phase-changing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820656088.6U CN208112243U (en) | 2018-05-03 | 2018-05-03 | Three-phase unbalanced phase-changing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208112243U true CN208112243U (en) | 2018-11-16 |
Family
ID=64114307
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820656088.6U Expired - Fee Related CN208112243U (en) | 2018-05-03 | 2018-05-03 | Three-phase unbalanced phase-changing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742775A (en) * | 2018-12-29 | 2019-05-10 | 深圳市嘉兆鸿电子有限公司 | Three-phase load balancing device and method |
-
2018
- 2018-05-03 CN CN201820656088.6U patent/CN208112243U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742775A (en) * | 2018-12-29 | 2019-05-10 | 深圳市嘉兆鸿电子有限公司 | Three-phase load balancing device and method |
| CN109742775B (en) * | 2018-12-29 | 2023-12-19 | 深圳市嘉兆鸿电子有限公司 | Three-phase load balancing device and method |
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