CN102076156A - Ballast as well as method and device for starting high-strength discharge lamp - Google Patents
Ballast as well as method and device for starting high-strength discharge lamp Download PDFInfo
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- CN102076156A CN102076156A CN2009102261096A CN200910226109A CN102076156A CN 102076156 A CN102076156 A CN 102076156A CN 2009102261096 A CN2009102261096 A CN 2009102261096A CN 200910226109 A CN200910226109 A CN 200910226109A CN 102076156 A CN102076156 A CN 102076156A
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- intensity discharge
- lamp
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000007423 decrease Effects 0.000 claims abstract 8
- 230000015556 catabolic process Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 5
- CVOFKRWYWCSDMA-UHFFFAOYSA-N 2-chloro-n-(2,6-diethylphenyl)-n-(methoxymethyl)acetamide;2,6-dinitro-n,n-dipropyl-4-(trifluoromethyl)aniline Chemical compound CCC1=CC=CC(CC)=C1N(COC)C(=O)CCl.CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O CVOFKRWYWCSDMA-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/2881—Load circuits; Control thereof
- H05B41/2882—Load circuits; Control thereof the control resulting from an action on the static converter
- H05B41/2883—Load circuits; Control thereof the control resulting from an action on the static converter the controlled element being a DC/AC converter in the final stage, e.g. by harmonic mode starting
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
本发明公开了一种用于启动高强度放电灯的装置(10)，包括：驱动装置(102)、谐振电路(104)和控制装置(106)，其中驱动装置(102)从电源(100)获得能量并且在控制装置(106)的控制下将一定频率的电压施加到谐振电路(104)上，谐振电路(104)将其输出电压施加到高强度放电灯(108)上，其中控制装置(106)被配置为控制驱动装置(102)的输出电压频率，使得该输出电压频率从谐振电路(104)的谐振频率(fRes)开始逐渐降低。此外，本发明还公开了一种包括用于启动高强度放电灯的装置的镇流器以及一种用于启动高强度放电灯的方法。
The invention discloses a device (10) for starting a high-intensity discharge lamp, comprising: a driving device (102), a resonant circuit (104) and a control device (106), wherein the driving device (102) is powered from a power source (100) Energy is obtained and a voltage of a certain frequency is applied to the resonant circuit (104) under the control of the control device (106), and the resonant circuit (104) applies its output voltage to the high-intensity discharge lamp (108), wherein the control device ( 106) configured to control the output voltage frequency of the driving device (102) such that the output voltage frequency gradually decreases starting from the resonant frequency (f Res ) of the resonant circuit (104). Furthermore, the invention discloses a ballast comprising means for starting a high intensity discharge lamp and a method for starting a high intensity discharge lamp.
Description
Technical field
The present invention relates to a kind of method that is used to start HID lamp (high-intensity discharge lamp), a kind of ballast of starting the device of HID lamp and having this device of being used to.
Background technology
The HID lamp comprises three phases from starting to the process that enters steady operation.In the phase I, high pressure is applied on the HID lamp, makes to puncture the dielectric that is comprised in the HID lamp.This high pressure produces by resonant circuit usually.In second stage, pre-thermal voltage is applied on the HID lamp, and feasible electrode to the HID lamp carries out preheating.In the phase III, normal operating voltage is applied on the HID lamp subsequently, so that lamp enters steady operation.
In the prior art, usual way is in the phase I near the high frequency voltage of the first frequency the resonance frequency of resonant circuit to be applied on the resonant circuit, be used to puncture the high pressure of HID lamp with generation, and the voltage that applies second frequency after the puncture that detects lamp comes the lamp electrode is carried out preheating.
The shortcoming of this method is after lamp punctures, because the lamp electrode is directly applied the voltage of second frequency, to make that the conductive component in lamp and the interlock circuit is subjected to the impact that current-jump produces.In addition, may for example may cause eletrode tip, film because the preheat curent of this saltus step cause the hyperthermia stress of lamp to cause the damage of the electrode system of lamp, be welded to connect the damage at position, the useful life of shortening lamp.
Summary of the invention
The objective of the invention is, a kind of method and apparatus that is used to start lamp is provided.Can alleviate defective of the prior art by this method and apparatus.In addition, the invention allows for and a kind ofly comprise that this is used to start the ballast of the device of lamp.
According to the present invention, a kind of device that is used to start high-intensity discharge lamp is provided, comprise: drive unit, resonant circuit and control device, wherein drive unit obtains energy and under the control of control device the voltage of certain frequency is applied on the resonant circuit from power supply, resonant circuit is applied to its output voltage on the high-intensity discharge lamp, wherein control device is configured to the output voltage frequency of accessory drive, makes this output voltage frequency begin to reduce gradually from the resonance frequency of resonant circuit.
In addition, according to the present invention, also provide a kind of ballast, it comprises the above-mentioned device that is used to start high-intensity discharge lamp.
In addition, according to the present invention, also provide a kind of method that is used to start high-intensity discharge lamp, comprising: the voltage that will have the resonance frequency of resonant circuit is applied on the resonant circuit, is used to puncture the high pressure of high-intensity discharge lamp with generation; Reduce the frequency of described voltage gradually, up to the best pre-heat frequency that reaches high-intensity discharge lamp, so that high-intensity discharge lamp is carried out preheating; Preheating makes high-intensity discharge lamp enter the steady operation stage after finishing.
By the present invention, can weaken electric current present impact when starting lamp, and reduce the thermal stress of electrode system between the starting period, thereby prolong the useful life of lamp.
Description of drawings
The present invention can wherein use same or analogous Reference numeral to represent identical or similar parts in institute's drawings attached by being better understood with reference to hereinafter given in conjunction with the accompanying drawings description.Described accompanying drawing comprises in this manual and forms the part of this specification together with following detailed description, and is used for further illustrating the preferred embodiments of the present invention and explains principle and advantage of the present invention.In the accompanying drawings:
Fig. 1 shows the block diagram that is used to start the device of HID lamp according to an embodiment of the invention.
Fig. 2 shows the block diagram of device that is used to start the HID lamp according to another embodiment of the present invention.
Fig. 3 shows the manipulated or operated apparatus that is used to start the HID lamp according to an embodiment of the invention.
Fig. 4 shows the flow chart that is used to start the method for HID lamp according to an embodiment of the invention.
Fig. 5 shows the flow chart of method that is used to start the HID lamp according to another embodiment of the present invention.
In the accompanying drawings, identical or corresponding parts have used identical reference marker.
Embodiment
To be described one exemplary embodiment of the present invention in conjunction with the accompanying drawings hereinafter.For clarity and conciseness, all features of actual execution mode are not described in specification.Yet, should understand, in the process of any this practical embodiments of exploitation, must make a lot of decisions specific to execution mode, so that realize developer's objectives, and these decisions may change to some extent along with the difference of execution mode.In addition, might be very complicated and time-consuming though will also be appreciated that development, concerning the those skilled in the art that have benefited from present disclosure, this development only is customary task.
At this, what also need to illustrate a bit is, for fear of having blured the present invention because of unnecessary details, only show in the accompanying drawings with according to the closely-related apparatus structure of the solution of the present invention, and omitted other details little with relation of the present invention.
The inventor notices that for inductor, its impedance is relevant with the frequency that applies alternating voltage thereon.When the frequency of voltage is high more, then impedance is big more, and the electric current that flows through inductor is more little, and when the frequency of voltage reduced, the electrorheological that flows through inductor was big.Utilize this principle, reduce the rush of current that lamp is subjected in the time of can realizing starting the HID lamp.
Fig. 1 shows the block diagram that is used to start the device 10 of HID lamp according to an embodiment of the invention.This device 10 comprises: drive unit 102, resonant circuit 104 and control device 106.Wherein drive unit 102 obtains energy and under the control of control device 106 voltage of certain frequency is being applied on the resonant circuit 104 from power supply 100.Resonant circuit 104 is applied to its output voltage on the HID lamp 108.Wherein, control device 106 is configured to the output voltage frequency of accessory drive 102, makes the resonance frequency f of this output voltage frequency from resonant circuit 104
ResBeginning reduces gradually.Because the initial output voltage frequency of drive unit 102 is the resonance frequency f of resonant circuit 104
Res, so resonant circuit 104 can output HIGH voltage to puncture the HID lamp.At this moment, because the electric voltage frequency height, so the inductance in the resonant circuit shows as and has high impedance, thereby makes that the electric current that flows through the HID lamp is less.Subsequently, owing to make the output voltage frequency of drive unit 102 reduce gradually by control device 106, make the impedance of the inductance in the resonant circuit reduce gradually, thereby the electric current that flows through the HID lamp becomes big gradually, the impact of having avoided current-jump to cause thus to a great extent to lamp from phase I that the HID lamp punctures to the second stage of the preheating of HID lamp, and the thermal stress that the electrode system that has reduced lamp bears, thereby advantageously prolonged life-span of lamp.
Need to prove that at this above-mentioned output voltage frequency is also nonessential strictly just from resonance frequency f
ResBeginning reduces gradually, but can begin near the value this resonance frequency to reduce, and only needs this frequency can make resonant circuit produce the sufficiently high voltage that is used to puncture lamp and gets final product.For example, output voltage frequency can be from being higher than resonance frequency f
ResFrequency begin to reduce gradually.
Need to prove that in addition the reduction of the output voltage frequency of drive unit 102 can be carried out as required in every way, for example can reduce gradually linearly, also can non-linearly reduce gradually.Also possible in addition is, continues the regular hour constantly to be used for puncturing more reliably the HID lamp near resonance frequency, little by little reduces subsequently, and these schemes all are that the thought that those skilled in the art propose according to the present invention can be expected.
Preferably, the parameter of resonant circuit and lamp system is designed so that the resonance frequency f of resonant circuit
ResDesirable pre-heat frequency f greater than the HID lamp
Pre, and control device 106 is configured to the output voltage frequency of accessory drive 102, makes the resonance frequency f of this output voltage frequency from resonant circuit 104
ResBeginning reduces gradually, until the desirable pre-heat frequency f that reaches the HID lamp
Pre, and keep this ideal pre-heat frequency to finish up to warm-up phase.At this, desirable pre-heat frequency f
PreRefer to the electric current that flows through the lamp electrode that under this frequency, produces and to realize best pre-heat effect.
Fig. 2 shows the block diagram of device 10 ' that is used to start the HID lamp according to another embodiment of the present invention.This device 10 ' corresponds essentially to the device 10 shown in Fig. 1, and difference is that device 10 comprises that also checkout gear 110 is used to detect the state of lamp.For example, checkout gear 110 detects the electric current that flows through HID lamp and resonant circuit, if this electric current surpasses set point, determine that then the HID lamp is breakdown, otherwise the HID lamp is not breakdown.When checkout gear 110 determined that lamp is breakdown, control device 106 began to reduce according to the output voltage frequency of coming the signal controlling drive unit 102 of self-test device 110.When checkout gear 110 determines that lamps are not breakdown, then repeat previous step, promptly make the output voltage frequency of drive unit 102 from the resonance frequency f of resonant circuit 104 once more
ResBeginning reduces gradually.Wherein the detection of this checkout gear 110 can be carried out after finishing whole warm, also can and carry out before warm begins after breakdown process finishes, and perhaps carries out in the middle of process is carried out in preheating.Note, after the said here warm, before the beginning or in the middle of the process of carrying out, be meant control circuit and drive circuit state, and do not mean that whether reality puncture of lamp according to preheating mode work.
This checkout gear is shown as with control device and is provided with discretely in Fig. 2, yet those skilled in the art understand this checkout gear 110 also can be integrated in the control device 106, for example checkout gear 110 and control device 106 can be same embedded scms, and it can be programmed realizes detecting and controlling two kinds of functions.Owing to have this checkout gear 110, control device can just begin to reduce the output voltage frequency of (perhaps continuing to reduce) drive unit 102 after affirmation HID lamp is breakdown, perhaps confirming that the HID lamp just provides (perhaps continuing provides) to make lamp enter the voltage of steady operation after breakdown, thereby improving the functional reliability of device 10 '.
Fig. 3 shows the manipulated or operated apparatus that is used to start the HID lamp according to an embodiment of the invention.It is pointed out that this circuit diagram only is that schematically purpose is for thought of the present invention is described.Those skilled in the art can be further improved at this circuit for the practical application purpose, and for example additional capacitors device or the like is gone up in parallel connection for the protection switch element, and this does not influence essence of the present invention.
As seen from Figure 3, drive unit 102 can comprise four switch element T1, T2, T3 and T4.The direct voltage of input E1, E2 input changes the alternating voltage that is applied on the LC oscillating circuit 104 into by drive unit 102.The output voltage of LC oscillating circuit 104 is applied on the HID lamp 108.As seen from Figure 3, the control end of switch element T1-T4 all is connected on the control device 106, the feasible break-make that can control these switch elements by control device, thereby the control that realization is exported to the electric voltage frequency of resonant circuit 104 to drive unit 102.Concrete control mode is, in first period, control device 106 makes switch element T1 and T4 conducting, and makes T2 and T3 turn-off, and in second period subsequently, makes switch element T2 and T3 conducting, and makes T1 and T4 turn-off.Next repeat such process again.By control switch element so alternately, make on LC oscillating circuit 104, to have alternating voltage.And, can control the frequency of this alternating voltage by the length of first period of control and second period.This control mode and control corresponding device are known for those skilled in the art, therefore no longer describe in detail.As embodiment before was described, control device can be configured to make the output voltage frequency of drive unit 102 from the resonance frequency f of resonant circuit 104
ResBeginning reduces gradually, make the impedance of the inductance in the resonant circuit reduce gradually, thereby the electric current that flows through HID lamp 108 becomes big gradually, the impact to lamp of having avoided the current-jump from phase I that the HID lamp punctures to the second stage of the preheating of HID lamp to cause has thus to a great extent advantageously prolonged life-span of lamp.
From what Fig. 3 can also see be in addition, control device for example can obtain information about lamp by terminal I1 and I2, for example can detect the size of current that flows through the HID lamp, thereby can after the judgement lamp is breakdown, begin to reduce the output voltage frequency of (perhaps continuing to reduce) drive unit 102, perhaps judging that lamp just provides (perhaps continuing provides) to make lamp enter the voltage of steady operation after breakdown, thereby improving the functional reliability of whole device.Need to prove that Fig. 3 is integrated in situation in the control device corresponding to checkout gear.Those skilled in the art expect also checkout gear and control device to be provided with discretely easily, and this does not influence essence of the present invention.
Such as already mentioned above, above-mentioned output voltage frequency is also nonessential strictly just from resonance frequency f
ResBeginning reduces gradually, and the reduction of the output voltage frequency of drive unit 102 can be carried out as required in every way in addition, for example can reduce gradually linearly, also can non-linearly reduce gradually.This output voltage frequency also may continue the regular hour and constantly is used for puncturing more reliably the HID lamp near resonance frequency in addition, little by little reduces subsequently, and these schemes all are that the thought that those skilled in the art propose according to the present invention can be expected.
Equally preferably the parameter of resonant circuit and lamp system is designed so that the resonance frequency f of resonant circuit
ResDesirable pre-heat frequency f greater than the HID lamp
Pre, and control device 106 is configured to the output voltage frequency of accessory drive 102, makes the resonance frequency f of this output voltage frequency from resonant circuit 104
ResBeginning reduces gradually, until the desirable pre-heat frequency f that reaches the HID lamp
Pre, and keep this ideal pre-heat frequency to finish up to warm-up phase.
Shown in circuit in, in order to judge whether warm-up phase finishes, for example the voltage of certain frequency can be applied on the resonant circuit 104 with output HID lamp required voltage (usually less than the required voltage of warm-up phase) in steady operation, and the electric current of lamp 108 is flow through in detection, when this electric current reaches the value of qualification, illustrate that lamp can enter steady operation, thereby think that warm-up phase should finish.Judge that the content whether warm-up phase finishes belongs to technology well-known to those skilled in the art, does not repeat them here.
According to another embodiment of the present invention, also proposed a kind of ballast, it comprises the device of putting down in writing according to the foregoing description that is used to start the HID lamp.
Fig. 4 shows the flow chart that is used to start the method for HID lamp according to an embodiment of the invention.This method may further comprise the steps:
S401: the voltage that will have the resonance frequency of resonant circuit is applied on the resonant circuit, is used to puncture the high pressure of HID lamp with generation;
S403: reduce the frequency of described voltage gradually, up to the best pre-heat frequency that reaches the HID lamp, so that the HID lamp is carried out preheating;
S405: after preheating finished, the HID lamp entered steady operation.
Need to prove at this, the voltage of above-mentioned resonance frequency with resonant circuit also nonessentially strictly has a frequency that equals resonance frequency just, but can have near this resonance frequency value, only need this frequency can make resonant circuit produce the sufficiently high voltage that is used to puncture lamp and get final product.For example, this voltage can have the frequency of the resonance frequency that is higher than resonant circuit.
Need to prove that in addition the reduction of electric voltage frequency can be carried out as required in every way, for example can reduce gradually linearly, also can non-linearly reduce gradually.Also possible in addition is, continues the regular hour constantly to be used for puncturing more reliably the HID lamp near resonance frequency, little by little reduces subsequently, and these schemes all are that the thought that those skilled in the art propose according to the present invention can be expected.
By this method, weakened the impact that the current-jump from phase I that the HID lamp punctures to the second stage of the preheating of HID lamp causes to a great extent to lamp, and the thermal stress that the electrode system that has reduced lamp bears, thereby advantageously prolonged life-span of lamp.
Fig. 5 shows the flow chart of method that is used to start the HID lamp according to another embodiment of the present invention.What can see is that step S501, S503 and S505 do not repeat them here it corresponding to the step S401 among Fig. 4, S403 and S405.Whether breakdown difference is, after applying the voltage of resonance frequency, also comprise and detect lamp step S502.When definite lamp is breakdown, continue execution in step S503.When definite lamp is not breakdown, then re-execute step S501.In this way, improved the functional reliability of this method.
Need to prove that this detection step also can be carried out after preheating finishes, promptly after step S503 and before step S505, carry out,, then re-execute step S501 if definite lamp is not breakdown.It also can reach the purpose that improves functional reliability.In addition, it is described to be similar to preamble, and step S502 and step S503 can have the crossover of various degree in time.
Equally preferably, be to make the resonance frequency f of resonant circuit with the parameter designing of resonant circuit and lamp system
ResDesirable pre-heat frequency f greater than the HID lamp
Pre, and make the output voltage frequency of resonant circuit from the resonance frequency f of resonant circuit
ResBeginning reduces gradually, until the desirable pre-heat frequency f that reaches the HID lamp
Pre, and keep this ideal pre-heat frequency to finish up to warm-up phase.
At last, also need to prove, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.In addition, do not having under the situation of more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Though more than describe embodiments of the invention in conjunction with the accompanying drawings in detail, should be understood that execution mode described above just is used to illustrate the present invention, and be not construed as limiting the invention.For a person skilled in the art, can make various changes and modifications above-mentioned execution mode and do not deviate from the spirit and scope of the invention.Therefore, scope of the present invention is only limited by appended claim and equivalents thereof.
Claims (11)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102261096A CN102076156A (en) | 2009-11-20 | 2009-11-20 | Ballast as well as method and device for starting high-strength discharge lamp |
| PCT/EP2010/067559 WO2011061180A1 (en) | 2009-11-20 | 2010-11-16 | Method and device for starting hid lamp, and ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102261096A CN102076156A (en) | 2009-11-20 | 2009-11-20 | Ballast as well as method and device for starting high-strength discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102076156A true CN102076156A (en) | 2011-05-25 |
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ID=43629716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102261096A Pending CN102076156A (en) | 2009-11-20 | 2009-11-20 | Ballast as well as method and device for starting high-strength discharge lamp |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102076156A (en) |
| WO (1) | WO2011061180A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102933011A (en) * | 2012-11-16 | 2013-02-13 | 张家港市星恒电子节能科技有限公司 | Control method for intelligent power grid variable frequency energy-saving street lamp |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69020053T2 (en) * | 1989-07-10 | 1996-01-25 | Philips Electronics Na | Circuit arrangement. |
| US6965204B2 (en) * | 2001-10-31 | 2005-11-15 | Koninklijke Philips Electronics N.V. | Ballasting circuit for optimizing the current in the take-over/warm-up phase |
-
2009
- 2009-11-20 CN CN2009102261096A patent/CN102076156A/en active Pending
-
2010
- 2010-11-16 WO PCT/EP2010/067559 patent/WO2011061180A1/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102933011A (en) * | 2012-11-16 | 2013-02-13 | 张家港市星恒电子节能科技有限公司 | Control method for intelligent power grid variable frequency energy-saving street lamp |
| CN102933011B (en) * | 2012-11-16 | 2014-10-15 | 张家港市星恒电子节能科技有限公司 | Control method for intelligent power grid variable frequency energy-saving street lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011061180A1 (en) | 2011-05-26 |
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Application publication date: 20110525 |