CN108565876A - A kind of no power-off has load commutation circuit - Google Patents
A kind of no power-off has load commutation circuit Download PDFInfo
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- CN108565876A CN108565876A CN201810526006.0A CN201810526006A CN108565876A CN 108565876 A CN108565876 A CN 108565876A CN 201810526006 A CN201810526006 A CN 201810526006A CN 108565876 A CN108565876 A CN 108565876A
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 39
- 239000010703 silicon Substances 0.000 claims abstract description 39
- 238000005259 measurement Methods 0.000 claims description 19
- 230000005389 magnetism Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 11
- 238000012546 transfer Methods 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000000819 phase cycle Methods 0.000 description 8
- 101000668165 Homo sapiens RNA-binding motif, single-stranded-interacting protein 1 Proteins 0.000 description 7
- 102100039692 RNA-binding motif, single-stranded-interacting protein 1 Human genes 0.000 description 7
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 description 6
- 101150105073 SCR1 gene Proteins 0.000 description 6
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 101000668170 Homo sapiens RNA-binding motif, single-stranded-interacting protein 2 Proteins 0.000 description 1
- 102100039690 RNA-binding motif, single-stranded-interacting protein 2 Human genes 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- H02J13/0075—
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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
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
A kind of no power-off has load commutation circuit, including, single-pole single-throw(SPST permanent-magnetic switching, it is single-phase silicon-controlled, single-pole double throw permanent-magnetic switching, conducting wire, its main feature is that, one single-pole single-throw(SPST and two single-pole double throw permanent-magnetic switching normal opened contacts and common junction are connected end to end successively, it is single-phase silicon-controlled that parallel connection one on contact is closed in each relay switch length, the normally closed contact extraction of each relay is connected with three phase mains respectively, the common junction connected load of the last one relay with changeover contact, relay and silicon-controlled by controller unit control action, the circuit may be implemented to be supported between three-phase online without power-off any switching laws, it realizes in power supply transfer process without power-off, no swell flow phenomenon occurs, peril as phase fault will not be caused to occur, therefore the circuit has high safety.
Description
Technical field
The present invention relates to low-voltage network system, more particularly to a kind of no power-off has load commutation circuit.
Background technology
In low-voltage network system, there are a large amount of single-phase loads, due to the unbalanced access of load and the difference of electricity consumption
Shi Xing, it may appear that the case where a large amount of single-phase loads concentrate on a phase or two-phase, these unbalanced loads can be such that distribution system generates
Three phase unbalance current, this three phase unbalance current can be such that neutral point voltage deviates, and then lead to imbalance of three-phase voltage, list
Overload of the phase tripping, transformer belt loading capability decline, increase loss on transmission and line loss.It is installed in parallel electricity using in transformer low voltage exit
Appearance formula tune mends device or power electronics formula (SVG) power quality controlling device, can be to the injustice of installation point front end (grid side)
Being balanced of electric current that weigh distribution, but there is no any change to the size of each phase load electric current of installation point rear end.
And the direct effective way for changing size of current in each phase line is exactly heavy in three alternate progress dynamics to single-phase load
New distribution, automatic phase-change switch is to realize the dedicated unit for dynamically distributing load, since the existing power supply system in China is frequency
The three-phase balanced system that 120 ° of 50Hz phase differences, it is each mutually there is no crosspoint in zero potential, therefore zero passage commutation is just not present.
In the prior art, when load being switched to another phase from a phase using conventional mechanical switch, there is must power off
The problem of；It at least needs to power off the 1/3 cycle above time to load using silicon control zero-cross switching circuit, otherwise can occur
Phase fault.
Invention content
The present invention is directed to the existing issue and Improvement requirement of phase-change switch, and creatively proposing a kind of no power-off has load to change
Circuitry phase really realizes that single-phase load, without power-off, no-flashy-flow switching power supply, efficiently solves low pressure confession between three phase mains
The technical barrier for implementing a kind of execution equipment of load Automatic dispatching distribution in electric process, perfectly realizes and exists to single-phase load
Three alternate progress dynamics are redistributed, and are conducive to the safety and economic operation of power grid and are improved power supply quality.
To realize the present invention purpose the technical solution adopted is that：A kind of no power-off has load commutation circuit, including, single-pole single-throw(SPST
Permanent-magnetic switching 1, single-phase silicon-controlled 1, single-pole double throw permanent-magnetic switching 1, single-phase silicon-controlled 24, single-pole double throw permanent-magnetic switching two
5, single-phase silicon-controlled 36, it is characterized in that：1 normal opened contact of single-pole single-throw(SPST permanent-magnetic switching and the A phases of three phase mains 8 is electrically connected
It connects, one 3 normally closed contact of single-pole double throw permanent-magnetic switching and the B of three phase mains 8 are electrically connected, the single-pole double throw permanent magnetism
25 normally closed contact of switch and the C of three phase mains 8 are electrically connected, the single-pole single-throw(SPST permanent-magnetic switching 1 and single-phase silicon-controlled 1
Parallel connection, 1 common junction of single-pole single-throw(SPST permanent-magnetic switching is electrically connected with one 3 normal opened contact of single-pole double throw permanent-magnetic switching, described
Conducting wire 7 be electrically connected with one 3 normally closed contact of single-pole double throw permanent-magnetic switching, one 3 normally closed contact of single-pole double throw permanent-magnetic switching
One 3 common junction of single-pole double throw permanent-magnetic switching and single-pole double throw permanent magnetism in parallel with single-phase silicon-controlled 24 with common junction, described
25 normal opened contact of switch is electrically connected, between 25 normally closed contact of single-pole double throw permanent-magnetic switching and common junction with it is single-phase controllable
Silicon 6 is in parallel.
25 common junction of single-pole double throw permanent-magnetic switching is electrically connected by Current Transmit with load 9, described
The ports measurement and control unit Ua and the A of three phase mains 8 are electrically connected, and the ports test cell Ub and the B phases of three phase mains 8 are electrically connected
It connects, the ports measurement and control unit Uc and the C of three phase mains 8 are electrically connected, and the ports the L electric wire of the load 9 passes through electric current
The ports I of mutual inductor CT, the measurement and control unit are electrically connected with Current Transmit secondary side.
A kind of no power-off of the present invention has load commutation circuit, due to by a single-pole single-throw(SPST and two single-pole double throw permanent-magnetic switchings
Normal opened contact and common junction are connected end to end successively, each relay switch length close on contact one in parallel it is single-phase silicon-controlled,
The normally closed contact extraction of each relay is connected with three phase mains respectively, and the public of the last one relay with changeover contact connects
Point connected load, relay and the silicon-controlled structure by controller unit control action, advantage are embodied in：
1. realization will be supported between three-phase, online without power-off any switching laws, without power-off, no-flashy-flow in power supply transfer process
Phenomenon occurs；
2. even if, will not there is the adhesion of single-pole single-throw(SPST permanent-magnetic switching or special circumstances that single-pole double throw permanent-magnetic switching blocks
Appearance leads to A phases and B phase short-circuit conditions；
3. further, even if any one or more relay contacts, burns viscous or be stuck in any position, in switching
In the process, the switching failure that can only cause switch, without causing peril as phase fault to occur, therefore the electricity
Road has high safety.
Description of the drawings
Fig. 1, which is the present invention, the single load commutation circuit schematic diagram for carrying commutation circuit without power-off；
The mono- load phase-change switch A-B commutation phase sequences of Fig. 2 and flow chart；
The mono- load phase-change switch B-A commutation phase sequences of Fig. 3 and flow chart；
The mono- load phase-change switch B-C commutation phase sequences of Fig. 4 and flow chart；
The mono- load phase-change switch C-B commutation phase sequences of Fig. 5 and flow chart；
The mono- load phase-change switch A-C commutation phase sequences of Fig. 6 and flow chart；
The mono- load phase-change switch C-A commutation phase sequences of Fig. 7 and flow chart；
Fig. 8, which is the present invention, the full load phase-change switch primary circuit principle of compositionality figure for carrying commutation circuit without power-off；
Fig. 9 full load phase-change switch control circuit functional block diagrams.
In figure：1 single-pole single-throw(SPST permanent-magnetic switching, 2 single-phase silicon-controlled one, 3 single-pole double throw permanent-magnetic switchings one, 4 is single-phase silicon-controlled
Two, 5 single-pole double throw permanent-magnetic switchings two, 6 single-phase silicon-controlled three, 7 conducting wires, 8 three phase mains, 9 loads.
Embodiment
Below in conjunction with Fig. 1-Fig. 9 and specific embodiment, invention is further described in detail, described herein specific
Embodiment only to explain the present invention, is not intended to limit the present invention.
Referring to Fig.1, a kind of no power-off has load commutation circuit, including, single-pole single-throw(SPST permanent-magnetic switching 1, single-phase silicon-controlled 1,
Single-pole double throw permanent-magnetic switching 1, single-phase silicon-controlled 24, single-pole double throw permanent-magnetic switching 25, single-phase silicon-controlled 36, conducting wire 7.
1 normal opened contact of single-pole single-throw(SPST permanent-magnetic switching is electrically connected by conducting wire 7 and the A of three phase mains 8, described
One 3 normally closed contact of single-pole double throw permanent-magnetic switching is electrically connected by conducting wire 7 and the B of three phase mains 8, the single-pole double throw permanent magnetism
25 normally closed contact of switch is electrically connected by conducting wire 7 and the C of three phase mains 8.The conducting wire 7 and single-pole single-throw(SPST permanent-magnetic switching 1
Normal opened contact is electrically connected, the single-pole single-throw(SPST permanent-magnetic switching 1 and single-phase silicon-controlled 1 hilted broadswords in parallel, described by conducting wire 7
It singly throws 1 common junction of permanent-magnetic switching to be electrically connected by conducting wire 7 with one 3 normal opened contact of single-pole double throw permanent-magnetic switching, the conducting wire 7
It is electrically connected, one 3 normally closed contact of single-pole double throw permanent-magnetic switching and public connects with one 3 normally closed contact of single-pole double throw permanent-magnetic switching
Point is in parallel by conducting wire 7 with single-phase silicon-controlled 24, and one 3 common junction of single-pole double throw permanent-magnetic switching and single-pole double throw are forever
25 normal opened contact of magnetic switch is electrically connected by conducting wire 7, and the conducting wire 7 is electrically connected with 25 normally closed contact of single-pole double throw permanent-magnetic switching
It connects, in parallel by conducting wire 7 with single-phase silicon-controlled 6 between 25 normally closed contact of single-pole double throw permanent-magnetic switching and common junction, institute
The conducting wire 7 stated is electrically connected with 25 common junction of single-pole double throw permanent-magnetic switching.
9 electricity of Current Transmit and load that 25 common junction of single-pole double throw permanent-magnetic switching is connected by conducting wire 7
Connection, the ports measurement and control unit Ua are electrically connected by conducting wire 7 and the A of three phase mains 8, the ports measurement and control unit Ub
It is electrically connected by conducting wire 7 and the B of three phase mains 8, the C phases that the ports measurement and control unit Uc pass through conducting wire 7 and three phase mains 8
The ports the L electric wire of electrical connection, the load 9 passes through Current Transmit, the ports I of the measurement and control unit and Current Mutual Inductance
Device CT secondary sides are electrically connected.
Permanent-magnet relay J1 is single-pole single-throw(SPST type permanent-magnetic switching 1, and permanent-magnet relay J2 is single-pole double-throw type permanent-magnetic switching one
3, permanent-magnet relay J3 are single-pole double-throw type permanent-magnetic switchings 25, and SCR1 is one-way SCR 1, and SCR2 is one-way SCR two
4, SCR3 be one-way SCR 36.
Measurement and control unit is mainly by microprocessor, signal conditioning circuit, controllable silicon drive circuit, permanent-magnet relay driving circuit
Equal circuits are constituted, and those skilled in the art can take different electronic components to constitute equivalent circuit design to realize.
Embodiment 1：
With reference to Fig. 2, illustrate that phase-change switch is switched to the process of B phases from A phases, ABC is positive phase sequence, and B phases lag A phases
6.67ms.Specific transfer process is as follows：
It is powered by A phases if circuit ortho states is load, relay J1 restores closed state after a loss of power, relay J1 when powering on
In closed state, 1 and 2 contacts of relay J2 and J3 are in the conduction state.In commutation, measurement and control unit, which first triggers, unidirectionally may be used
Silicon SCR1 conductings are controlled, and turns off relay J1 in A phase current positive half periods and triggers SCR2 conductings.A phases after relay J1 is disconnected
Electric current is powered by unidirectional controllable silicon S CR1 branches to load, about after A phase current positive half periods 8.33ms, the electricity of B phases
When pressure will be above A phase voltages, the naturally reversed shutdowns of unidirectional controllable silicon S CR1, and unidirectional controllable silicon S CR2 is by observing and controlling unit triggers
Conducting, in A phases and after the B equal potentials moment, the one-way conduction characteristic based on diode, circuit to the power supply of load will automatically by
A phases are switched to B phases.Relay J2 is switched to 3 positions by measurement and control unit again in B phase current positive half periods, then equal alternating currents
Negative half period arrival unidirectional controllable silicon S CR1, SCR2 naturally reversed shutdown in succession, while measurement and control unit cancels touching for SCR1 and SCR2
It signals, that is, completes the conversion that load is powered by the power supply of A phase lines to B phase lines, realize in power supply transfer process without power-off, no-flashy-flow
Phenomenon occurs.
With reference to Fig. 3, phase-change switch is switched to the process of A phases from B phases, and ABC is positive phase sequence, and B phases lag A phases 6.67ms.Tool
Body transfer process is as follows：
Circuit ortho states is that load is powered by B phases, and relay J1 is off, and relay J2's and J3 is in 2 contacts
Conducting state.In commutation, measurement and control unit first triggers unidirectional controllable silicon S CR2 conductings, and switches relay in B phase current positive half periods
Device J2 simultaneously and triggers SCR1 conductings to contact 2.B phase currents pass through unidirectional controllable silicon S CR2 branch after relay J2 breaks 3
Road powers to load, about after B phase current positive half periods 8.33ms, when the voltage of A phases will be above B phase voltages, unidirectionally may be used
The naturally reversed shutdowns of silicon SCR2 are controlled, and unidirectional controllable silicon S CR1 has been connected by observing and controlling unit triggers, in A phases and B equal potentials
After quarter, the one-way conduction characteristic based on diode, circuit will be switched to A phases by B phases automatically to the power supply of load.In A phase currents
Relay J1 is switched to closed position by measurement and control unit again in positive half period, then equal alternating currents negative half period arrival one-way SCR
SCR1, SCR2 naturally reversed shutdown in succession, while measurement and control unit cancels the trigger signal of SCR1 and SCR2, that is, completes load by B
The conversion that phase line power supply is powered to A phase lines.
With reference to attached drawing 4, attached drawing 5, attached drawing 6 and attached drawing 7, similarly, phase-change switch changes between B and C between commutation and A and C
Commutation process is similarly between phase handoff procedure and above-mentioned A and B phases.Phase-change switch measurement and control unit passes through internal processes or external command
It determines that control is powered by that phase power supply for load, and then controls relay and silicon-controlled action, and measured by Current Transmit
Pass through the load current of switch.Measurement and control unit can pass through the wireless networks such as 433M LORA or ZIGBEE and the master mounted on outside
Controller or the free group net operation of other controllers are realized that more phase-change switch devices are uniformly controlled operation, can also be passed through
GPRS public wireless networks access internet and realize remote monitoring.
Embodiment 2：
With reference to attached drawing 8 and attached drawing 9, three single-phase loads are opened between three phase mains without the commutation for powering off arbitrary commutation connection
It closes.The switch is connected between power supply and load when in use, and end of incoming cables A, B, C, N are connected on Ua, Ub, Uc of three phase mains respectively
And zero curve, leading-out terminal La, Lb, Lc connect negative, all single-phase loads of each connect load of phase respectively.Controller is according to program or outside
Order, which by driving circuit sends out control wave and controls the action of each permanent-magnet relay and trigger, single-phase silicon-controlled to be led
It is logical, to realize that the load that La, Lb, Lc are connect is powered in the three alternate continuous arbitrary commutations of electricity.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill of the art
For personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Protection scope of the present invention should be considered as.
Claims (2)
1. a kind of no power-off has load commutation circuit, including, single-pole single-throw(SPST permanent-magnetic switching (1), single-phase silicon-controlled one (2), hilted broadsword pair
Throw permanent-magnetic switching one (3), single-phase silicon-controlled two (4), single-pole double throw permanent-magnetic switching two (5), single-phase silicon-controlled three (6), feature
It is：Single-pole single-throw(SPST permanent-magnetic switching (1) normal opened contact and the A of three phase mains (8) is electrically connected, and the single-pole double throw is forever
Magnetic switch one (3) normally closed contact and the B of three phase mains (8) are electrically connected, and the single-pole double throw permanent-magnetic switching two (5) is normally closed to be connect
The C of point and three phase mains (8) is electrically connected, and the single-pole single-throw(SPST permanent-magnetic switching (1) is in parallel with single-phase silicon-controlled one (2), institute
Single-pole single-throw(SPST permanent-magnetic switching (1) common junction stated is electrically connected with single-pole double throw permanent-magnetic switching one (3) normal opened contact, and described leads
Line (7) is electrically connected with single-pole double throw permanent-magnetic switching one (3) normally closed contact, and the single-pole double throw permanent-magnetic switching one (3) is normally closed to be connect
Point and common junction are in parallel with single-phase silicon-controlled two (4), and single-pole double throw permanent-magnetic switching one (3) common junction is double with hilted broadsword
The electrical connection of permanent-magnetic switching two (5) normal opened contact is thrown, between single-pole double throw permanent-magnetic switching two (5) normally closed contact and common junction
It is in parallel with single-phase silicon-controlled three (6).
2. a kind of no power-off according to claim 1 has load commutation circuit, characterized in that the single-pole double throw permanent magnetism is opened
It closes two (5) common junctions to be electrically connected with load (9) by Current Transmit, the ports measurement and control unit Ua and three phase mains
(8) A is electrically connected, and the ports test cell Ub and the B of three phase mains (8) are electrically connected, the measurement and control unit Uc
The C of port and three phase mains (8) is electrically connected, and the ports the L electric wire of the load (9) passes through Current Transmit, described
The ports I of measurement and control unit are electrically connected with Current Transmit secondary side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810526006.0A CN108565876A (en) | 2018-05-29 | 2018-05-29 | A kind of no power-off has load commutation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810526006.0A CN108565876A (en) | 2018-05-29 | 2018-05-29 | A kind of no power-off has load commutation circuit |
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| CN108565876A true CN108565876A (en) | 2018-09-21 |
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|---|---|---|---|
| CN201810526006.0A Pending CN108565876A (en) | 2018-05-29 | 2018-05-29 | A kind of no power-off has load commutation circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050270137A1 (en) * | 2004-05-21 | 2005-12-08 | Yarbrough Charles T Iii | Dimensionally flexible sparse matrix topology |
| CN205248819U (en) * | 2015-11-20 | 2016-05-18 | 王海 | Looks switch is selected to three phase loads of low pressure |
| CN107046292A (en) * | 2017-04-26 | 2017-08-15 | 天津紫光奇智电气科技有限公司 | A kind of phase-change switch formula three-phase load unbalance controlling device |
| CN107147113A (en) * | 2017-06-05 | 2017-09-08 | 泰豪科技股份有限公司 | A kind of phase change method and device without phase fault |
-
2018
- 2018-05-29 CN CN201810526006.0A patent/CN108565876A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050270137A1 (en) * | 2004-05-21 | 2005-12-08 | Yarbrough Charles T Iii | Dimensionally flexible sparse matrix topology |
| CN205248819U (en) * | 2015-11-20 | 2016-05-18 | 王海 | Looks switch is selected to three phase loads of low pressure |
| CN107046292A (en) * | 2017-04-26 | 2017-08-15 | 天津紫光奇智电气科技有限公司 | A kind of phase-change switch formula three-phase load unbalance controlling device |
| CN107147113A (en) * | 2017-06-05 | 2017-09-08 | 泰豪科技股份有限公司 | A kind of phase change method and device without phase fault |
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