CN1178597A - Device for voltage control - Google Patents
Device for voltage control Download PDFInfo
- Publication number
- CN1178597A CN1178597A CN 96192536 CN96192536A CN1178597A CN 1178597 A CN1178597 A CN 1178597A CN 96192536 CN96192536 CN 96192536 CN 96192536 A CN96192536 A CN 96192536A CN 1178597 A CN1178597 A CN 1178597A
- Authority
- CN
- China
- Prior art keywords
- voltage
- switch element
- single district
- winding
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
A device for uninterrupted voltage control with an autotransformer has a first contact member (11), with which the load section (4) of the transformer can be bridged, and a second contact member (9), with which the primary winding (2) of the transformer can be deactivated. When switching over to changing the voltage to the consumer (6), both contact members (9, 11) are controlled in such a way that the load section (4) forms a choke.
Description
The present invention relates to a kind of with the do not have a power failure device of voltage-regulation of autotransformer.
Street lamp device usually at night during the traffic peak with full luminous intensity work, promptly with line voltage distribution work, the voltage power supply to reduce during the night traffic low ebb.Concerning gas discharge bulb, must not carry out under the power-off condition to the switch transition of line voltage distribution from line voltage distribution to the voltage that reduces and from the voltage that reduces, otherwise bulb will damage.
In prior art, people are used for this occasion with continuous adjustable transformer.For example, with on the iron core only around the autotransformer of a winding, the winding input is connected with center line with the phase line of electrical network, the output of winding is connected with center line with the leading-out terminal of Transformer Winding.Obtain extraction voltage by on winding coil, drawing the lead that is connected to power device.The ratio of extraction voltage and rated voltage equals the ratio of the number of turn and the total number of turns of winding between winding output and the leading point.Therefore whole winding has been formed the elementary winding of autotransformer, and the winding district between exit and the center line has formed the secondary winding of autotransformer.Elementary winding district between electrical network phase line and the exit is also referred to as load region.
In order to make the transformer scalable, known method is to make winding with bare wire, uses the collecting brush that slides on bare wire along winding to make exit.Because whole load current flows through collecting brush, so collecting brush must be well-designed.In addition, need come shifting brush with a motor, the sliding contact between brush and the winding is worn collecting brush.
The voltage regulating transformer that exit is housed on the winding also is known.For prevent take place to have a power failure during the switch transition with to be connected and the number of turn of disconnecting between short circuit, exit with to each the bar branch road between the feed line of power device, two switch elements are housed all, resistance of parallel connection on the second switch element.The switch transition process with connection be connected branch road promptly the resistance in first branch road begin, the substitutional resistance on another branch road is set up the annexation of first branch road and new exit then.At this moment between two exits winding by short circuit, thereby but in this short circuit current, have two resistance to limit short circuit current.At this moment when first switch element of first branch road disconnected, new exit had connected.Obtaining transformer by the second switch element on closed second branch road at last is connected with the direct of outside feeder line.Known voltage regulating transformer with step switch (steping switch) is owing to have two switch elements and a resistance thereby need elaborate on each exit, so the price comparison costliness.
Be to save the power supply expense, known method is to distribute because of a plurality of equipment by output control to connect the peak power that causes simultaneously.For this purpose, former technology is: design the operation that the control circuit at each power consumption equipment comes the direct intervention individual equipment, for example intervene with the method for regularly turning off equipment.Yet following one by one is control circuit cost of equipment costliness.Also have, this regulative mode is not suitable for having the equipment of complicated operational mode.
The purpose of this invention is to provide a kind of voltage regulating transformer simple in structure, it allows to carry out switch transition under the situation that power device does not have a power failure.
According to the present invention, the have the right device of requirement 1 described feature of apparatus can achieve this end.Dependent claims 2 has been described the preferred embodiments of the present invention to 7.Claim 8 to 10 has been described the advantageous applications of apparatus of the present invention.
First switch element of the transformer in apparatus of the present invention is preferably used in the load region of bypass transformer, and the another one switch element is used to make elementary winding to quit work.Can also provide it in the controlled area.Consider that switch transition changes the voltage on the power device, thereby control two switch elements like this: make load region form an inductance, power device always is provided minimum voltage in the switch transition process like this.
The very short short circuit current of time that short-circuit condition exists when carrying out simultaneously, the switch transition between two independent switch elements almost do not have inductive impact, to such an extent as to can not rise.Therefore, switch element can be controlled like this and make duration of short circuit very limited to prevent that switch element or circuit from damaging.
With regard to adjustable transformer, elementary and/or secondary winding preferably is made of single district (singleportion) at least in part, and these single districts can be interconnected to a combination winding that adapts with extraction voltage.There is first switch element at least one single district on its current path, other switch element is arranged between its input and output.Switch element preferably is made up of contactor.Can there be a resistance, an inductance and/or a fuse in each single district.One of them switch element preferably is placed on the circuit that connects power device and electrical network phase line.The another one switch element can be placed on the load region of output and the circuit that power device links to each other.
The Transformer Winding of autotransformer is preferably in the load region that has to link to each other, link to each other with power device with the electrical network phase line on the input on output, link to each other with center line and to the controlled area that small part is made of single district, single district can connect into a combination winding that adapts with extraction voltage with center line one of output.The controlled area preferably includes a first and a second portion.Second portion is placed between first and the load region.The number of turn of the second portion that links to each other with center line is constant, and the first that can link to each other with center line the number of turn be variable.
Electric installation may be the lighting apparatus of a using gases discharge bulb.When gas discharge bulb was worked under full luminous intensity, when promptly working under line voltage distribution, first switch element of apparatus of the present invention was closed, and the second switch element disconnects.When brightness will weaken, i.e. when generation reduced with the corresponding voltage of the no-load voltage ratio of transformer, first switch element must disconnect, second switch element closure.This needs certain switch transition time.Two switch elements preferably are made up of contactor and/or the contactor with a closing contact and a break contact of a band plurality of closed contact.Concerning one as the contactor of switch element, there are several milliseconds the switch transition time.For preventing that bulb from damaging, the present invention thereby the switch element in the primary circuit disconnected earlier.The load region of transformer is so promptly the zone flow through of load current becomes an inductance.So just avoided the damage of bulb in the switch transition process.Follow another one switch element closure, so produced a corresponding voltage drop of the no-load voltage ratio with transformer.
Except that regulating lighting apparatus, apparatus of the present invention also have many other preferred possible application.
For example apparatus of the present invention can be used in the output control, promptly as load management.For this purpose, it can be received a single power device or one group of power device before.
According to formula P=U
2/ R, square being directly proportional of power (P) and voltage (U).Just for the resistive power device, smaller change in voltage can the bigger variable power of causing.Therefore to take into account the problem that equipment can be worked usually fully in a voltage tolerant (as 230V ± 10%).
Apparatus of the present invention thereby allow under the situation of the mode of operation of control circuit and nonintervention power device not, to carry out load management.On the contrary, apparatus of the present invention can be used for the voltage of supplying with power device is brought up to greater than supply voltage under the underloading situation.Apparatus of the present invention are controlled according to loading condition.
When the voltage on the electric equipment (as the electric substation on the electric power supply network) that has many power devices dropped in the basic allowed band, concerning the power device of far zone more, voltage may drop to below the permissible value so.Therefore apparatus of the present invention also help be used in as the voltage compensation of electric power supply network or the voltage compensation of electric equipment.
Apparatus of the present invention not only can be used for step-down and also can be used for boosting.This can be by realizing (load voltage and rated voltage are swapped round) with opposite order switching transformer between power device and supply voltage.
Below by at length the present invention being illustrated with reference to the accompanying drawings, each opens the different windings of scheming all to show according to autotransformer of the present invention to Fig. 1 to Fig. 5.
According to Fig. 1, autotransformer comprises and has iron core-closed 1 of winding 2.Whole winding 2 has been formed the elementary winding of autotransformer, and on the winding 2 electrical network L mutually and the district 4 between the exit 3 to the lead 5 of gas discharge bulb 6 constituted load region, load current flows to bulb 6 through this load region.Winding district 7 between exit 3 and the center line N has formed the secondary winding of autotransformer, and exciting current IM flows through this secondary winding with the offset current relevant with load.
The L of electrical network links to each other with lead 5 through bypass lead 8.First switch element 9 is arranged on the bypass lead 8 so as when switch element 9 to be closed bypass load region 4.The lead 10 of the output of secondary winding 7 through having second switch element 11 links to each other with center line N.
Two switch elements 9 and 11 are made up of contactor, promptly are made up of the remote control electromagnetic switch, preferably are made up of closing contact on the same contactor and break contact, perhaps are made up of two closing contacts on the contactor, as shown in the figure.
If volume voltage is U1, load voltage is U2.When switch element 9 disconnections and switch element 11 closures, when promptly contactor was not energized, bulb 6 was worked under the situation of voltage U 2＜U1 (by the transformer step-down).In order to switch to rated voltage U1, need the excitation contactor from load voltage U2.Switch element 9,11, promptly closing contact on the contactor and break contact are control like this: first cut-off switch element 11 is Closing Switch element 9 again.Like this, during the switch transition of contactor, play the inductance effect in 4 short time of load region (as 5 to 50 milliseconds).Though inductance can produce voltage drop, and is very little, thereby in the switch transition process, supply to have sufficient voltage U 2 on the bulb 6.Switch element 9 closures make load region 4 or inductance by bypass then, and bulb 6 is just worked under rated voltage U1 like this, i.e. U2=U1.
When requiring from rated voltage U1 switch transition to the voltage U 2 that reduces, contactor is energized and makes switch element 9 disconnect, and causes load region 4 to become an inductance.Contactor Closing Switch element 11 then.So allow from U2=U1 to U2＜the U1 conversion that do not have a power failure, vice versa.
If rated voltage is 220 volts, the voltage that reduces so just may be 180 volts.In any case the voltage U 2 that must guarantee to reduce is greater than opening the required minimum voltage of gas discharge bulb, in order to take the fluctuation of rated voltage into account, it is big 5 volts to 10 volts that the voltage that reduces cans be compared to minimum voltage most.
When U2=U1, the load region 4 of transformer thereby by bypass, elementary winding 2 or controlled area 7 quit work.Switch to U2＜U1 and when the voltage that reduces switches to voltage U 2=U1 at voltage, two switch elements 9,11 all are control like this: make load region 4 become an inductance before being connected on gas discharge bulb.
Fig. 2 represents a transformer that is wound with elementary winding 12 and secondary winding 13 on iron core-closed 1.Can as autotransformer, switch with lead 16 these transformers by lead 15.
Be connected with electrical network L through lead 15 at the elementary winding 12 of input, placed second switch element 11 on the lead 15.The output of elementary winding 12 is connected with center line N through lead 16.
When working under voltage U 2＜U1 situation that bulb 6 is reducing, switch element 9 disconnects switch element 11 closures.In the switch transition that is transformed into voltage U 2=U1, switch element 11, promptly the closing contact on the contactor is disconnected earlier, and switch element 9 then, and promptly second closing contact on the contactor is closed again.During this switch transition of several milliseconds, secondary winding 13 is as inductance work, thereby assurance has enough voltage to make bulb 6 work.Switch element 9 closures work bulb 6, just U2=U1 under rated voltage U1 then.
When load voltage U2 when U2=U1 is transformed into the voltage U 2＜U1 that reduces, switch element 9 at first is disconnected and makes secondary winding 13 as inductance work, switch element 11 is closed subsequently.
Just, when U2=U1, secondary winding 13, promptly the load region of transformer is by bypass, and elementary winding 12 quits work.Voltage switch to voltage U 2＜U1 of reducing and when the voltage that reduces switches to voltage U 2,=U1 two switch element 9,11 Be Controlled make load region 4 become an inductance before being connected on gas discharge bulb.
Fig. 3 represent one can sensitive regulating load voltage U 2 autotransformer.Here with the secondary winding 7 among the 17 replacement Fig. 1 of controlled area.
Controlled area 17 is made up of first 18 and second portion 19.The number of turn of the number of turn of second portion 19 and load region 4 is adjacent.The number of turn of the first 18 of controlled area 17 comprises that a plurality of single district I are to IV.
Each single district I has first switch element 24 to 27 to IV on himself current path.In addition, switch element 28 to 31 is placed on each single district I between the input E and output terminals A of IV.The input E of lead 32 to 35 from each single district I to IV guides to relevant single district I to the wire turn of IV, and first switch element 24 to 27 is placed on the lead 32 to 35.Also have lead 36 to 39 to guide to their output terminals A to the wire turn of IV from each single district I.
The input E of first single district I links to each other through the output of lead 40 with the second portion 19 of controlled area 17, and links to each other with center line N through lead 41 away from single output terminals A of distinguishing IV of second portion 19, and switch element 11 is placed on the lead 41.Switch element 28 to 31 is placed on each single district I between the lead 32 and 36,33 and 37,34 and 38,35 and 39 of IV.
Each single district I has the different numbers of turn to IV.For example, single district I has 10 circles, and single district II has 20 circles, and single district III has 40 circles, and single district IV has 80 circles.
Thereby the number of turn NM of the controlled area 17 that links to each other with center line can change according to extraction voltage U2.The number of turn NM of controlled area comprises the constant number of turn NM-const and the variable number of turn NM-V of the single district I that links to each other with center line N to IV of second portion 19.
Just, if the number of turn NM of controlled area 17 is made up of the constant number of turn NM-const of second portion 19 and the 10 circle numbers of turn of single district I, switch element 24 closures of single district I, input E and the switch element between the output terminals A 28 at single area I disconnect, and the single district of residue II disconnects to the switch element 25,26,27 of IV, at single II that distinguishes to the input E of IV and the switch element between the output terminals A 29 to 31 closure all.
For example, if equaling NM-const, the number of turn NM of controlled area 17 adds 70 circles, so single district I is to switch element 24,25,26 closures of III, and disconnect to input E and the switch element between the output terminals A 28,29,30 of III at single district I, and the switch element 27 of single district IV disconnects, in the input E of single district IV and switch element 31 closures between the output terminals A.
Obviously, can make the connected number of turn change to 150 circles to IV, be divided into 16 grades, every grade of interval 10 circles from zero circle with the single district I among Fig. 3.Every grade all corresponding with certain variation of the magnitude of voltage of extraction voltage.
For example, if rated voltage U1 is 220 volts, four single district I extraction voltage U2 when IV connects is 210 volts, and four single, and to distinguish I extraction voltage U2 when IV only disconnects promptly the number of turn with the second portion 19 of controlled area 17 be 170 volts, thereby voltage U 2 just can be divided 16 grades of variations between 170 volts to 210 volts.
Yet the voltage change of each grade is different big.That is to say, do not have linear relationship between the magnitude of voltage variation of extraction voltage U2 and the connected number of turn.
The relation that is connected between number of turn NR and the extraction voltage U2 is drawn by following formula:
Wherein: NL-represents the number of turn of load region 4
U1-represents rated voltage
NF-represents the constant number of turn of the second portion 19 in the controlled area 17.
Calculated according to formula (I) and to have had the example of 6 single district I to VI: in the number of turn of single district I is that the number of turn of 2 circles, single district II is that the number of turn of 5 circles, single district III is that the number of turn of 11 circles, single district IV is that the number of turn of 24 circles, single district V is that the number of turn of 54 circles, single VI of district is that 103 circles and rated voltage are under 220 volts the condition, extraction voltage U2 can the wiring variation from 120 volts to 205 volts, and every grade of interval is approximately 5 volts.Yet lighting apparatus does not need U2 to increase by linearity usually or reduces, and does not even wish so sometimes.
Whole effective winding, be the elementary winding that number of turn NR has formed autotransformer that is connected in the first 18 of second portion with constant number of turn NF 19 in load region 14, the controlled area 17 and controlled area 17, and be connected the secondary winding that the number of turn has been formed autotransformer in second portion 19 and the first 18.Obviously the elementary winding and the secondary winding of autotransformer can change, and this depends on which single district I is connected to each other and is connected with center line N to IV.
This transformer can also be designed to three-phase transformer.
According to Fig. 3, if single district I is closed simultaneously to first switch element 24 to 27 and second switch element 28 to 31 among the IV, to such an extent as to so relevant single district I is damaged by short circuit to IV.Can be with contactor remote control switch as switch element 24 to 31, they were not only cheap but also can bear millions of times switch transition.
Yet, when using contactor, will inevitably produce of short duration exciting current and interrupt as switch element 24 to 31.During switch transition, promptly during several milliseconds the short interruption, concerning bulb 6 load region 4 as inductance work.The voltage that is added to bulb 6 two ends like this between transfer period is: rated voltage U1 deducts load voltage UL.Just, if rated voltage is 220 volts, load voltage is 5 volts, and when switching with contactor, the voltage that is added on the bulb just is 215 volts so.Thereby of short duration light flash can take place.
On the one hand, in order not glimmer, two switch element 24 and 28,25 and 29,26 and 30,27 and 31 of each single district I to the IV should switch simultaneously; But then, they cannot be closed simultaneously, if because can be short-circuited at that rate.
Yet short circuit current needs the regular hour, and (as 2 to 10 milliseconds) could be set up fully.Therefore,, for example be not more than half of short circuit current settling time switching time, cause relevant single district I will reduce greatly by short circuit so to the danger of IV damage if used switch element 24 to 31 has the very short switch transition time.
If can be received in during the switch transition the above-mentioned peak load that of short duration flicker showed, so just be willing to cheap commercialization contactor by the light of bulb 6., if single district I just can not use the contactor of cheapness when the switch 24 and 28,25 and 29,26 and 30,27 and 31 of IV is energized simultaneously, even the settling time of the switch transition time ratio short circuit current of contactor, weak point also was like this.
Its remedial measure is: perhaps use larger-size contactor, perhaps at single district I to the current path of IV Anywhere, resistance or inductance for example are set on lead 36 to 39, distinguish the resistance 43 that I places on lead 36 this point has been described for single among Fig. 3.Resistance or inductance be limiting short-circuit current correspondingly at short notice.Also have, the fuse (not drawing among the figure) of connecting with resistance 43 can prevent that transformer from catching fire when the switch transition fault takes place.
In transformer shown in Figure 4, elementary winding 12 is made of to IV single district I, and the constituted mode of the first 18 in the controlled area 17 of constituted mode and autotransformer shown in Figure 3 is identical.Same lable number is correspondingly used on switch element 24 to 31, lead 32 to 39 and the resistance 43 among Fig. 4.Switch element 11 is placed on the lead 16, and single output and center line N that distinguishes IV coupled together.Because lead 15 and 16 are arranged, therefore this transformer also switches as autotransformer.
In the embodiment shown in fig. 5, there are a plurality of branch roads 53,54,55 controlled area 17 of autotransformer, alternately is connected with center line N by these branch roads of switch element 50,51,52 (the most handy contactor).
Claims (10)
1. one kind with the do not have a power failure device of voltage-regulation of autotransformer, it is characterized in that: have a switch element (11 at least in primary circuit (2,12); 24 to 31; 50,51,52) so that the transformer function is not worked, in primary circuit (2,12) or parallel circuits, also has a switch element (9,24 to 31 at least in the load region (4,13) of transformer; 50,51,52), switch element (9,11; 24 to 31) Be Controlled makes load region (4,13) become an inductance during the switch transition of the voltage (U2) of power device (6) for a change.
2. device according to claim 1 is characterized in that: switch element (9,11; 24 to 31; 50 to 52) form by contactor.
3. device according to claim 1 and 2 is characterized in that: elementary winding and/or secondary winding (2,12; 17,13) constitute by single district (I is to IV) to small part, single district (I is to IV) can be interconnected into one with power device on the combination winding that adapts of voltage (U2).
4. device according to claim 3, it is characterized in that: have a single district (I is to IV) at least, on the current path in single district, one first switch element (24 to 27) is arranged, also have a switch element (28 to 31) to be positioned between the input (E) and output (A) in single district.
5. a described device of claim in requiring according to aforesaid right, it is characterized in that: there are a resistance, an inductance (43) and/or a fuse in each single district (I is to IV).
6. a described device of claim in requiring according to aforesaid right, it is characterized in that: the Transformer Winding of autotransformer has an input to be connected with (L) of electrical network, the load region (4) that output is connected with power device (6), the controlled area (17) that is connected with center line (N) with an output, controlled area (17) to small part is made of single district (I is to IV), single district (I is to IV) can with center line N connect into one with power device on the combination winding that adapts of voltage (U2).
7. device according to claim 6, it is characterized in that: controlled area (17) are made of a first (18) and a second portion that is between first (18) and the load region (4), second portion (19) is constant with the number of turn that center line (N) is connected, and first (18) is variable with the number of turn that center line (N) is connected.
8. any described device of claim in aforesaid right being required is used to regulate lighting apparatus.
9. any described device of claim in the claim 1 to 7 is used for the output control of a power device or one group of power device.
10. the voltage compensation that any described device of claim in the claim 1 to 7 is used for electric equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96192536 CN1178597A (en) | 1995-02-02 | 1996-02-01 | Device for voltage control |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19503379.5 | 1995-02-02 | ||
| DE19541341.5 | 1995-11-06 | ||
| DE19543249.5 | 1995-11-20 | ||
| CN 96192536 CN1178597A (en) | 1995-02-02 | 1996-02-01 | Device for voltage control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1178597A true CN1178597A (en) | 1998-04-08 |
Family
ID=5128329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96192536 Pending CN1178597A (en) | 1995-02-02 | 1996-02-01 | Device for voltage control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1178597A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498633C (en) * | 2004-09-28 | 2009-06-10 | 赖茵豪森机械制造公司 | Device for regulating electrical voltage |
| CN105281335A (en) * | 2015-11-05 | 2016-01-27 | 宁波绿凯节能科技有限公司 | Single-lamp voltage compensation device of high-intensity discharge lamp |
| WO2023117698A1 (en) | 2021-12-23 | 2023-06-29 | Rhodia Operations | Process for the preparation of lithium rare-earth halides |
-
1996
- 1996-02-01 CN CN 96192536 patent/CN1178597A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498633C (en) * | 2004-09-28 | 2009-06-10 | 赖茵豪森机械制造公司 | Device for regulating electrical voltage |
| CN105281335A (en) * | 2015-11-05 | 2016-01-27 | 宁波绿凯节能科技有限公司 | Single-lamp voltage compensation device of high-intensity discharge lamp |
| CN105281335B (en) * | 2015-11-05 | 2019-06-21 | 宁波绿凯节能科技有限公司 | A kind of high-voltage gas discharging light list modulating voltage compensation device |
| WO2023117698A1 (en) | 2021-12-23 | 2023-06-29 | Rhodia Operations | Process for the preparation of lithium rare-earth halides |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN88103402A (en) | Be used for the direct-current-alternating-current converter that gaseous discharge lamp ignites and powers | |
| US5872430A (en) | Single switch electronic ballast with low in-rush current | |
| GB2353152A (en) | Starter circuit for discharge lamps | |
| CN1753293A (en) | Device for power supply of variable load | |
| CN1150803C (en) | Circuit device | |
| GB2144001A (en) | Power supply circuit | |
| EP2384606B1 (en) | Device for controlling a plurality of electrical consumers | |
| CN1178597A (en) | Device for voltage control | |
| CN1430460A (en) | Driving apparatus of gas discharge lamp | |
| EP3641501B1 (en) | Led driving circuit and led apparatus | |
| CN210469152U (en) | On-load voltage regulation circuit with polarity conversion for staggered parallel nine-gear transformer | |
| CN2119718U (en) | Current-and voltage-limiting electricity saver | |
| CN1366796A (en) | Switched dimming ballast | |
| CN2160937Y (en) | Multi-stage compensated ac electric power stabilizer | |
| KR100877586B1 (en) | Circuit of electronic ballast having dimming control type | |
| EP0243948A2 (en) | Control circuit for an arc lamp | |
| DE19830792B4 (en) | Circuit arrangement with light-emitting diode, in particular for a bicycle light | |
| CN200944198Y (en) | Asymmetric compensation contactless A.C. voltage regulator with curve-based output | |
| CN2600846Y (en) | Intelligent regulation and control converting station | |
| CN1319269A (en) | Power supply Device for protective device for switchgear | |
| RU2025911C1 (en) | Outdoor lighting system | |
| CN1387291A (en) | Ups | |
| DE3513311A1 (en) | CIRCUIT ARRANGEMENT | |
| KR200358976Y1 (en) | Auto Power Saver | |
| RU2088054C1 (en) | Device for ignition of gas-discharge lamps |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |