CN103997832A - On-load voltage regulation control circuit for roadway illumination control and control method thereof - Google Patents
On-load voltage regulation control circuit for roadway illumination control and control method thereof Download PDFInfo
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- CN103997832A CN103997832A CN201410237030.4A CN201410237030A CN103997832A CN 103997832 A CN103997832 A CN 103997832A CN 201410237030 A CN201410237030 A CN 201410237030A CN 103997832 A CN103997832 A CN 103997832A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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Abstract
The invention discloses an on-load voltage regulation control circuit for roadway illumination control and a control method thereof. The on-load voltage regulation control circuit comprises a winding, an AC connecting end and a load. The AC connecting end is provided with an L end and an N end. The winding is provided with a secondary coil and a plurality of primary coils. The secondary coil N1 is provided with a tap A1 and a tap A2, the tap A1 is connected with the L end, and the two ends of the load are connected with the tap A2 and the N end respectively. Taps of the primary coils are respectively connected with the N end through an on-off control circuit. The on-off control circuit is a combinational circuit including a plurality of switches, the number of the connected primary coils and the series-parallel connection structure can be selected through the on-off control circuit, and thus the voltage regulating size and precision can be changed. According to the on-load voltage regulation control circuit, the four different operation working conditions of normal voltage, boosting, voltage reduction and parallel connection can be achieved, the size is greatly decreased, the cost is greatly lowered, the discontinuous power supply problem can be solved, and the power supply reliability is improved.
Description
Technical field
The present invention relates to circuit transformation technical field, refer in particular to a kind of on-load voltage regulation control circuit and control method thereof of controlling for road lighting.
Background technology
Traditional transformer is mainly divided into isolating transformer and the large class of autotransformer two.
The primary coil of isolating transformer and secondary coil are separately coilings, although be to be all contained on same iron core, insulate each other, and primary coil and secondary coil only have the coupling of magnetic, there is no electric contact.But, due to the power of transformer from power supply absorption, all by the electromagnetic induction between two coils, to be sent to load to go, so when transformer capacity is identical, isolating transformer consume material is many, and volume is large, and cost is high, but its on-load voltage regulation can adopt the multiple voltage regulating modes such as neutral point pressure regulation, and pressure regulation is simple.
Autotransformer only has a coil, and secondary outlet is from primary coil tap, and therefore primary and secondary coil is except there being contact magnetic, that also have direct electricity.A delivering power part for autotransformer is that electromagnetic induction transmits, and another part directly transmits by circuit.Therefore when transformer capacity is identical, autotransformer coil Capacity Ratio isolating transformer is little, and the silicon steel sheet that transformer is used and number of conductors be corresponding minimizing also, so volume is little, cost compare is low, but its on-load voltage regulation can only adopt line end pressure regulation.
For road lighting is controlled, because road lighting adopts high-voltage gas discharging light more, its load need guarantee power supply continuity, otherwise the series of problems such as can cause that lamp goes out.If adopt autotransformer to carry out pressure regulation, existence cannot guarantee the problem of power supply continuity, has instant cut-off situation during such as switching tap; If adopt isolating transformer to carry out pressure regulation, its volume of increase and the cost along with load will be doubled and redoubled so, is unfavorable for producing and installing.
Summary of the invention
For solving road illumination adopt in controlling autotransformer carry out pressure regulation cannot guarantee power supply continuity, adopt isolating transformer carry out pressure regulation volume and cost large and be unfavorable for the problem of producing and installing, a kind of on-load voltage regulation control circuit and control method thereof of controlling for road lighting proposed, bearing power transmits and mainly by circuit, is directly born, can realize normal pressure, boost, the operation operating state of step-down, four kinds of different conditions in parallel, volume and cost all greatly reduce, there is not the discontinuous problem of power supply, the reliability of the power supply of raising.
The technical solution adopted in the present invention is: a kind of on-load voltage regulation control circuit of controlling for road lighting, comprise winding and exchange link and load, described interchange link has L end and N end, described winding has a secondary coil and several primary coils, described secondary coil N1 has tap A1 and tap A2, tap A1 connects L end, load two ends connect respectively tap A2 and N end, the tap of described primary coil is connected with N end respectively by ON-OFF control circuit, described ON-OFF control circuit is the combinational circuit that contains several switches, ON-OFF control circuit is used for controlling normal pressure, boost, step-down, quantity and the series parallel structure of the primary coil under four kinds of different conditions in parallel.
Bearing power of the present invention transmits and mainly by circuit, is directly born, transformer only plays indirect regulation effect, even therefore also very little for the coil capacity of larger load transformer, therefore volume and cost all greatly reduce, simultaneously because bearing power is directly obtained by electrical network, so there is not the discontinuous problem of power supply, the reliability of the power supply of raising.ON-OFF control circuit by the quantity of primary coil and the selection of series parallel structure can realize normal pressure, boost, the operation operating state of step-down, four kinds of different conditions in parallel.
As preferably, described primary coil has three, is respectively primary coil N2, primary coil N3 and primary coil N4, and primary coil N2 has tap B1 and tap B2, and primary coil N3 has tap C1 and tap C2, and primary coil N4 has tap D1 and tap D2.
As preferably, described ON-OFF control circuit comprises K switch 1, K switch 2, K switch 3, K switch 4, K switch 5, K switch 6, K switch 11, K switch 12, K switch 13, K switch 14, K switch 21, K switch 22, K switch 23, K switch 24, tap A2 connects tap D1 by K switch 1, tap A2 connects tap C1 by K switch 2, tap A2 connects tap B1 by K switch 3, tap A2 connects tap D2 by K switch 4, tap A2 connects tap C2 by K switch 5, tap A2 connects tap B2 by K switch 6, tap B1 is connected to N by K switch 11 and holds, tap B2 is connected tap C1 by K switch 21 with K switch 22, the connected node of K switch 21 and K switch 22 is connected to N by K switch 12 and holds, tap C2 is connected tap D1 by K switch 23 with K switch 24, the connected node of K switch 23 and K switch 24 is connected to N by K switch 13 and holds, tap D2 is connected to N by switch 14 and holds.
A control method for the on-load voltage regulation control circuit of controlling for road lighting as above, selects quantity and the series parallel structure of the primary coil of connection by ON-OFF control circuit, thereby changes size and the precision of pressure regulation:
(1) when normal pressure moves, only secondary coil N1 is connected into circuit, now secondary coil N1 is equivalent to number of turn inductance seldom, and impact is ignored;
(2) when needs brownout operation, electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil, and ON-OFF control circuit is controlled the quantity of primary coil series connection place in circuit, changes the size of step-down;
(3) when needs booste operation, electric current is different name end with secondary coil tap A1 tap enters from each primary coil, and ON-OFF control circuit is controlled the quantity of primary coil series connection place in circuit, changes the size of boosting;
(4), when parallel running, ON-OFF control circuit is controlled the quantity of parallel connection of primary windings place in circuit.
As preferably, when three of primary coils and while being respectively primary coil N2, primary coil N3 and primary coil N4, described step (2) is divided into following situation:
K switch 1, K14 are communicated with, and only have primary coil N4 place in circuit;
K switch 2, K23, K13 are communicated with, and only have primary coil N3 place in circuit;
K switch 3, K21, K12 are communicated with, and only have primary coil N2 place in circuit;
K switch 2, K23, K24, K14 are communicated with, primary coil N3 and primary coil N4 series connection place in circuit;
K switch 3, K21, K23, K23, K13 are communicated with, primary coil N2 and primary coil N3 series connection place in circuit;
K switch 3, K21, K23, K24, K14 are communicated with, primary coil N2, primary coil N3 and primary coil N4 series connection place in circuit.
As preferably, when three of primary coils and while being respectively primary coil N2, primary coil N3 and primary coil N4, described step (3) is divided into following situation:
K switch 4, K24, K13 are communicated with, and only have primary coil N4 place in circuit;
K switch 5, K22, K12 are communicated with, and only have primary coil N3 place in circuit;
K switch 6, K11 are communicated with, and only have primary coil N2 place in circuit;
K switch 4, K24, K23, K22, K12 are communicated with, primary coil N3 and primary coil N4 series connection place in circuit;
K switch 5, K22, K21, K11 are communicated with, primary coil N2 and primary coil N3 series connection place in circuit;
K switch 4, K24, K23, K22, K21, K11 are communicated with, primary coil N2, primary coil N3 and primary coil N4 series connection place in circuit.
As preferably, when three of primary coils and while being respectively primary coil N2, primary coil N3 and primary coil N4, described step (4) is divided into following situation:
K switch 2, K23, K13, K3, K21, K12 are communicated with, primary coil N2 and primary coil N3 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil;
K switch 1, K14, K3, K21, K12 are communicated with, primary coil N2 primary coil N4 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil;
K switch 1, K14, K2, K23, K13 are communicated with, primary coil N3 and primary coil N4 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil;
K switch 1, K14, K2, K23, K13, K3, K21, K12 are communicated with, primary coil N2, primary coil N3 and primary coil N4 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil;
K switch 6, K11, K5, K22, K12 are communicated with, primary coil N2, primary coil N3 place in circuit in parallel;
K switch 6, K11, K4, K24, K13 are communicated with, primary coil N2, primary coil N4 place in circuit in parallel;
K switch 4, K24, K13, K5, K22, K12 are communicated with, primary coil N3 and primary coil N4 place in circuit in parallel;
K switch 4, K24, K13, K5, K22, K12, K6, K11 are communicated with, primary coil N2, primary coil N3 and primary coil N4 place in circuit in parallel, and electric current is different name end with secondary coil tap A1 tap enters from each primary coil.
The invention has the beneficial effects as follows: can realize normal pressure, boost, the operation operating state of step-down, four kinds of different conditions in parallel, volume and cost all greatly reduce, and do not have the discontinuous problem of power supply, the reliability of the power supply of raising.
Accompanying drawing explanation
Fig. 1 is a kind of electrical block diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, a kind of on-load voltage regulation control circuit of controlling for road lighting, comprises winding and exchanges link and load RL, exchanges link and has L end (live wire end) and N end (zero line side).Winding secondary only has a secondary coil, i.e. secondary coil N1, and secondary coil N1 has tap A1 and tap A2, and tap A1 connects L end, and load RL two ends connect respectively tap A2 and N end; Winding elementary has three primary coils, be primary coil N2, primary coil N3, primary coil N4, primary coil N2 has tap B1 and tap B2, primary coil N3 has tap C1 and tap C2, primary coil N4 has tap D1 and tap D2, and the tap of primary coil is held with N respectively by ON-OFF control circuit.Different according to the connected mode of winding, the turn ratio of former limit secondary is different, thereby by changing the number of turn, changes size and the precision of pressure regulation.Secondary being connected in load circuit, its terminal voltage changes with the former limit number of turn, thereby plays the pressure regulation effect to circuit.
ON-OFF control circuit comprises K switch 1, K switch 2, K switch 3, K switch 4, K switch 5, K switch 6, K switch 11, K switch 12, K switch 13, K switch 14, K switch 21, K switch 22, K switch 23, K switch 24, tap A2 connects tap D1 by K switch 1, tap A2 connects tap C1 by K switch 2, tap A2 connects tap B1 by K switch 3, tap A2 connects tap D2 by K switch 4, tap A2 connects tap C2 by K switch 5, tap A2 connects tap B2 by K switch 6, tap B1 is connected to N by K switch 11 and holds, tap B2 is connected tap C1 by K switch 21 with K switch 22, the connected node of K switch 21 and K switch 22 is connected to N by K switch 12 and holds, tap C2 is connected tap D1 by K switch 23 with K switch 24, the connected node of K switch 23 and K switch 24 is connected to N by K switch 13 and holds, tap D2 is connected to N by switch 14 and holds.ON-OFF control circuit for controlling normal pressure, boost, quantity and the series parallel structure of the primary coil under step-down, four kinds of different conditions in parallel.
The required power of load of the present invention all passes through circuit transmission, capacity=(secondary winding rated voltage/rated voltage with load) * bearing power that transformer is required, compared with traditional transformer greatly reduce (less than traditional transformer 20%), its volume and cost also corresponding minimizing are many.There is not the problems such as power supply is discontinuous simultaneously, meet the reliability requirement of road lighting load.
In this programme, when need series connection umber of turn is less, owing to now flowing through, the electric current of winding is larger, can unnecessary winding is in parallel with it by control switch, and required sectional area of wire in the time of can reducing coiling in this way, and then reduce the volume of transformer.
When normal pressure moves, only by N1 place in circuit, now N1 is equivalent to a small inductor and is present in circuit, due to the N1 number of turn seldom, its impact is negligible.
In the time of needs step-down, N2, N3, N4 connect and count one or more as required, wherein tap A1, tap B1, tap C1, tap D1 are one group of Same Name of Ends, electric current is from tap A1, tap B1, tap C1, tap D1 input, play hypotensive effect, by control switch K1 ~ K3, select the quantity of series connection winding, can change the size of step-down, play voltage regulating action.K switch 1, K14 are communicated with, and only have primary coil N4 place in circuit; K switch 2, K23, K13 are communicated with, and only have primary coil N3 place in circuit; K switch 3, K21, K12 are communicated with, and only have primary coil N2 place in circuit; K switch 2, K23, K24, K14 are communicated with, primary coil N3 and primary coil N4 series connection place in circuit; K switch 3, K21, K23, K23, K13 are communicated with, primary coil N2 and primary coil N3 series connection place in circuit; K switch 3, K21, K23, K24, K14 are communicated with, primary coil N2, primary coil N3 and primary coil N4 series connection place in circuit.
When needs boost, tap B2, tap C2, tap D2 and tap A1 be different name end each other, and electric current flows into from tap B2, tap C2, tap D2 and tap D1, raising voltage effect, by control switch K4 ~ K6, select the quantity of series connection winding, change the size of boosting, play voltage-regulation effect.K switch 4, K24, K13 are communicated with, and only have primary coil N4 place in circuit; K switch 5, K22, K12 are communicated with, and only have primary coil N3 place in circuit; K switch 6, K11 are communicated with, and only have primary coil N2 place in circuit; K switch 4, K24, K23, K22, K12 are communicated with, primary coil N3 and primary coil N4 series connection place in circuit; K switch 5, K22, K21, K11 are communicated with, primary coil N2 and primary coil N3 series connection place in circuit; K switch 4, K24, K23, K22, K21, K11 are communicated with, primary coil N2, primary coil N3 and primary coil N4 series connection place in circuit.
When parallel running, by controlling K1 ~ K3 or K4 ~ K6 by two or three parallel runnings in N2, N3, N4 and regulating the quantity of winding in parallel, to meet the use under larger current conditions.K switch 2, K23, K13, K3, K21, K12 are communicated with, primary coil N2 and primary coil N3 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil; K switch 1, K14, K3, K21, K12 are communicated with, primary coil N2 primary coil N4 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil; K switch 1, K14, K2, K23, K13 are communicated with, primary coil N3 and primary coil N4 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil; K switch 1, K14, K2, K23, K13, K3, K21, K12 are communicated with, primary coil N2, primary coil N3 and primary coil N4 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil; K switch 6, K11, K5, K22, K12 are communicated with, primary coil N2, primary coil N3 place in circuit in parallel; K switch 6, K11, K4, K24, K13 are communicated with, primary coil N2, primary coil N4 place in circuit in parallel; K switch 4, K24, K13, K5, K22, K12 are communicated with, primary coil N3 and primary coil N4 place in circuit in parallel; K switch 4, K24, K13, K5, K22, K12, K6, K11 are communicated with, primary coil N2, primary coil N3 and primary coil N4 place in circuit in parallel, and electric current is different name end with secondary coil tap A1 tap enters from each primary coil.
The present embodiment has only illustrated the situation of only having three primary coils, but the invention is not restricted to three primary coils, and four or more primary coil are equally applicable to the present invention.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection scope of the present invention.
Claims (7)
1. an on-load voltage regulation control circuit of controlling for road lighting, comprise winding and exchange link and load, it is characterized in that: described interchange link has L end and N end, described winding has a secondary coil and several primary coils, described secondary coil N1 has tap A1 and tap A2, tap A1 connects L end, load two ends connect respectively tap A2 and N end, the tap of described primary coil is held with N respectively by ON-OFF control circuit, described ON-OFF control circuit is the combinational circuit that contains several switches, ON-OFF control circuit is used for controlling normal pressure, boost, step-down, quantity and the series parallel structure of the primary coil under four kinds of different conditions in parallel.
2. the on-load voltage regulation control circuit of controlling for road lighting according to claim 1, it is characterized in that: described primary coil has three, be respectively primary coil N2, primary coil N3 and primary coil N4, primary coil N2 has tap B1 and tap B2, primary coil N3 has tap C1 and tap C2, and primary coil N4 has tap D1 and tap D2.
3. the on-load voltage regulation control circuit of controlling for road lighting according to claim 2, is characterized in that: described ON-OFF control circuit comprises K switch 1, K switch 2, K switch 3, K switch 4, K switch 5, K switch 6, K switch 11, K switch 12, K switch 13, K switch 14, K switch 21, K switch 22, K switch 23, K switch 24, tap A2 connects tap D1 by K switch 1, tap A2 connects tap C1 by K switch 2, tap A2 connects tap B1 by K switch 3, tap A2 connects tap D2 by K switch 4, tap A2 connects tap C2 by K switch 5, tap A2 connects tap B2 by K switch 6, tap B1 is connected to N by K switch 11 and holds, tap B2 is connected tap C1 by K switch 21 with K switch 22, the connected node of K switch 21 and K switch 22 is connected to N by K switch 12 and holds, tap C2 is connected tap D1 by K switch 23 with K switch 24, the connected node of K switch 23 and K switch 24 is connected to N by K switch 13 and holds, tap D2 is connected to N by switch 14 and holds.
4. the control method of an on-load voltage regulation control circuit of controlling for road lighting according to claim 1, it is characterized in that: by ON-OFF control circuit, select quantity and the series parallel structure of the primary coil of connection, thereby change size and the precision of pressure regulation:
(1) when normal pressure moves, only secondary coil N1 is connected into circuit, now secondary coil N1 is equivalent to number of turn inductance seldom, and impact is ignored;
(2) when needs brownout operation, electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil, and ON-OFF control circuit is controlled the quantity of primary coil series connection place in circuit, changes the size of step-down;
(3) when needs booste operation, electric current is different name end with secondary coil tap A1 tap enters from each primary coil, and ON-OFF control circuit is controlled the quantity of primary coil series connection place in circuit, changes the size of boosting;
(4), when parallel running, ON-OFF control circuit is controlled the quantity of parallel connection of primary windings place in circuit.
5. the control method of the on-load voltage regulation control circuit of controlling for road lighting according to claim 4, it is characterized in that: when three of primary coils and while being respectively primary coil N2, primary coil N3 and primary coil N4, described step (2) is divided into following situation:
K switch 1, K14 are communicated with, and only have primary coil N4 place in circuit;
K switch 2, K23, K13 are communicated with, and only have primary coil N3 place in circuit;
K switch 3, K21, K12 are communicated with, and only have primary coil N2 place in circuit;
K switch 2, K23, K24, K14 are communicated with, primary coil N3 and primary coil N4 series connection place in circuit;
K switch 3, K21, K23, K23, K13 are communicated with, primary coil N2 and primary coil N3 series connection place in circuit;
K switch 3, K21, K23, K24, K14 are communicated with, primary coil N2, primary coil N3 and primary coil N4 series connection place in circuit.
6. the control method of the on-load voltage regulation control circuit of controlling for road lighting according to claim 4, it is characterized in that: when three of primary coils and while being respectively primary coil N2, primary coil N3 and primary coil N4, described step (3) is divided into following situation:
K switch 4, K24, K13 are communicated with, and only have primary coil N4 place in circuit;
K switch 5, K22, K12 are communicated with, and only have primary coil N3 place in circuit;
K switch 6, K11 are communicated with, and only have primary coil N2 place in circuit;
K switch 4, K24, K23, K22, K12 are communicated with, primary coil N3 and primary coil N4 series connection place in circuit;
K switch 5, K22, K21, K11 are communicated with, primary coil N2 and primary coil N3 series connection place in circuit;
K switch 4, K24, K23, K22, K21, K11 are communicated with, primary coil N2, primary coil N3 and primary coil N4 series connection place in circuit.
7. the control method of the on-load voltage regulation control circuit of controlling for road lighting according to claim 4, it is characterized in that: when three of primary coils and while being respectively primary coil N2, primary coil N3 and primary coil N4, described step (4) is divided into following situation:
K switch 2, K23, K13, K3, K21, K12 are communicated with, primary coil N2 and primary coil N3 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil;
K switch 1, K14, K3, K21, K12 are communicated with, primary coil N2 primary coil N4 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil;
K switch 1, K14, K2, K23, K13 are communicated with, primary coil N3 and primary coil N4 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil;
K switch 1, K14, K2, K23, K13, K3, K21, K12 are communicated with, primary coil N2, primary coil N3 and primary coil N4 place in circuit in parallel, and electric current is Same Name of Ends with secondary coil tap A1 tap enters from each primary coil;
K switch 6, K11, K5, K22, K12 are communicated with, primary coil N2, primary coil N3 place in circuit in parallel;
K switch 6, K11, K4, K24, K13 are communicated with, primary coil N2, primary coil N4 place in circuit in parallel;
K switch 4, K24, K13, K5, K22, K12 are communicated with, primary coil N3 and primary coil N4 place in circuit in parallel;
K switch 4, K24, K13, K5, K22, K12, K6, K11 are communicated with, primary coil N2, primary coil N3 and primary coil N4 place in circuit in parallel, and electric current is different name end with secondary coil tap A1 tap enters from each primary coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410237030.4A CN103997832B (en) | 2014-05-30 | The on-load voltage regulation control circuit controlled for roadway illumination and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410237030.4A CN103997832B (en) | 2014-05-30 | The on-load voltage regulation control circuit controlled for roadway illumination and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103997832A true CN103997832A (en) | 2014-08-20 |
| CN103997832B CN103997832B (en) | 2016-11-30 |
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| WO2022061620A1 (en) * | 2020-09-23 | 2022-03-31 | Siemens Gas And Power Gmbh & Co. Kg | Auto-transformer, method for designing auto-transformer and storage medium |
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| CN2704094Y (en) * | 2004-04-16 | 2005-06-08 | 中国石化胜利油田有限公司技术检测中心 | Multi-stage on-load automatic voltage-regulating transformer |
| CN1588747A (en) * | 2004-08-27 | 2005-03-02 | 南宁欧顶电气有限责任公司 | Three phase voltage-stabilizing controller and its control method |
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| CN105826925A (en) * | 2016-06-07 | 2016-08-03 | 国网青海省电力公司 | Automatic voltage regulator and automatic voltage regulation method |
| WO2022061620A1 (en) * | 2020-09-23 | 2022-03-31 | Siemens Gas And Power Gmbh & Co. Kg | Auto-transformer, method for designing auto-transformer and storage medium |
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