CN106301001A - Operating circuit for sinusoidal wave constant-current dimmer - Google Patents
Operating circuit for sinusoidal wave constant-current dimmer Download PDFInfo
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- CN106301001A CN106301001A CN201610760810.6A CN201610760810A CN106301001A CN 106301001 A CN106301001 A CN 106301001A CN 201610760810 A CN201610760810 A CN 201610760810A CN 106301001 A CN106301001 A CN 106301001A
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- channel type
- effect transistor
- type power
- field effect
- power field
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- 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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses the operating circuit for sinusoidal wave constant-current dimmer, the present invention is by utilizing the electricity components and parts such as N-channel type power field effect transistor, diode, electric capacity and inductance by integrated to AC DC and two kinds of translation circuits of DC AC and collaborative work.The present invention is possible not only to while completing rectification carry out high power factor correction for the operating circuit of sinusoidal wave constant-current dimmer, it is substantially reduced the power supply harmonic pollution to electrical network, while also supporting sine wave output electric current, its frequency arbitrarily can control according to loading demand and occurrence frequency conversion.
Description
Technical field
The present invention relates to dimmer operation circuit, be particularly used for the operating circuit of sinusoidal wave constant-current dimmer.
Background technology
The dimmer configuration used on the market at present substantially has two kinds: controllable silicon phase-controlled dimmer is with IGBT high-frequency PWM just
String ripple dimmer.But both light devices are all AC/AC single stage shift circuit.Its operation principle of brief description and deficiency.Controlled
Silicon phase-controlled dimmer carries out phased copped wave by controllable silicon quasiconductor to power-frequency voltage and adjusts output, input current power factor
Low, harmonic wave is big, and it is long-pending that reactive current needs increasing to be twice the cross-section of cable, needs to increase a power compensating device in input and just can subtract
Little dimmer is on the interference of electrical network and impact；Output voltage electric current crest factor is big, and harmonic content is high, not only can directly affect and help
The life-span of boat light fixture, and booster transformer noise is very big (more than 80dB).And frequency is identical with electrical network, only 50Hz,
Since so, the volume and weight of booster transformer and isolating transformer is the biggest, the booster transformer weight of a such as 30k
Amount, more than 200kg, is not only taken ferrum expense copper, is taken machine room area big, and carrying and installation is the most highly difficult.High-frequency PWM dimmer leads to
Cross high frequency chopping, repeatedly copped wave conversion in a power frequency period, one can be obtained closely through High frequency filter input and output
Like sinusoidal wave current waveform, there is certain improvement relative to phase-controlled dimmer, but relatively big by input electric network influencing, work as electrical network
Harmonic content higher time, its output waveform also can contain substantial amounts of harmonic wave, be not the sine wave of standard；And its output frequency
Rate can only be mains frequency, the most only 50Hz, cannot be avoided the booster transformer of super large weight and volume equally.Both the above is adjusted
Light device main circuit broadly falls into AC/AC single stage shift, it is impossible to realize frequency conversion function.
Summary of the invention
It is an object of the invention to provide the operating circuit for sinusoidal wave constant-current dimmer, solve current dimmer work
Make output waveform present in circuit and contain a large amount of harmonic wave, and booster transformer and the nothing of big weight and large volume must be used
Method realizes the problem of frequency conversion function, is corrected High Power Factor, and supports frequency transformation while having reached rectification
Purpose.
The present invention is achieved through the following technical solutions:
For the operating circuit of sinusoidal wave constant-current dimmer, including inductance L1, electric capacity C3, inductance L2, electric capacity C4 and three parallel connections
Branch road；One end of inductance L1 is connected on live wire L, and the other end is divided into three parallel branches；Electric capacity C3 one end is connected to inductance L1
The one end being connected with live wire L on, the other end connect neutral conductor N.Article three, in parallel branch, the first branch road includes N-channel type merit
Rate field-effect transistor Q1, N-channel type power field effect transistor Q2, N-channel type power field effect transistor Q3, N-channel type
Power field effect transistor Q4, diode D3, diode D4, diode D5, diode D6.N-channel type power field effect crystal
The drain electrode of pipe Q1 connects the other end of inductance L1, and gate pole is connected with external control signal；The negative pole of diode D3 and N-channel type merit
The drain electrode of rate field-effect transistor Q1 is connected, the source electrode phase of the positive pole of diode D3 and N-channel type power field effect transistor Q1
Even.The source electrode of N-channel type power field effect transistor Q2 is connected with the source electrode of N-channel type power field effect transistor Q1, gate pole
Access external control signal；The positive pole of diode D4 is connected with the source electrode of N-channel type power field effect transistor Q2, diode D4
Negative pole be connected with the drain electrode of N-channel type power field effect transistor Q2.The drain electrode of N-channel type power field effect transistor Q4 with
The drain electrode of N-channel type power field effect transistor Q2 is connected, and gate pole accesses external control signal；The negative pole of diode D5 and N ditch
The drain electrode of channel type power field effect transistor Q3 is connected, and the positive pole of diode D5 is with N-channel type power field effect transistor Q3's
Source electrode is connected.The source electrode of N-channel type power field effect transistor Q4 and the source electrode phase of N-channel type power field effect transistor Q3
Even, gate pole accesses external control signal, and drain electrode is connected with inductance L2；The positive pole of diode D6 is brilliant with N-channel type power field effect
The source electrode of body pipe Q4 is connected, and the negative pole of diode D6 is connected with the drain electrode of N-channel type power field effect transistor Q4.Article three, parallel connection
In branch road, the second branch road includes diode D1, diode D7, N-channel type power field effect transistor Q5.The positive pole of diode D1
Connecting inductance L1, negative pole is connected with the drain electrode of N-channel type power field effect transistor Q5；The negative pole of diode D7 and N-channel type
The drain electrode of power field effect transistor Q5 is connected, the positive pole of diode D7 and the source electrode of N-channel type power field effect transistor Q5
It is connected；The gate pole of N-channel type power field effect transistor Q5 accesses external control signal, and source electrode is connected with inductance L2.Article three, also
In connection branch road, the 3rd branch road includes diode D2, diode D8, N-channel type power field effect transistor Q6.Diode D2's is negative
Pole connects inductance L1, and positive pole is connected with the source electrode of N-channel type power field effect transistor Q6；The positive pole pole of diode D8 and N ditch
The source electrode of channel type power field effect transistor Q5 is connected, and the negative pole of diode D8 is with N-channel type power field effect transistor Q6's
Drain electrode is connected；The gate pole of N-channel type power field effect transistor Q6 accesses external control signal, and drain electrode is connected with inductance L2.Electricity
The other end of sense L2 is connected on live wire L；Electric capacity C4 one end connects neutral conductor N, and the other end and inductance L2 are connected with live wire L
One end is connected.This system is the integrated of AC-DC and DC-AC two kinds conversion.AC-DC is a kind of efficient rectification circuit, completes whole
High power factor correction can also be carried out while stream, be substantially reduced the power supply harmonic pollution to electrical network.DC-AC is a kind of efficient
T-shaped three-level inverter circuit, while sine wave output electric current, frequency also can arbitrarily control according to loading demand and convert frequency
Rate.
Further, electric capacity C1 and electric capacity C2 is also included；Electric capacity C1 one end is connected to diode D1 and N-channel type power field
On the common port of effect transistor Q5, the other end is connected to N-channel type power field effect transistor Q2 and imitates with N-channel type power field
Answer on the common port of transistor Q3；Electric capacity C2 one end is connected to N-channel type power field effect transistor Q2 and N-channel type power field
On the common port of effect transistor Q3, the other end is connected to the public of diode D2 and N-channel type power field effect transistor Q6
On end；The common port of electric capacity C1 with C2 is also connected with neutral conductor N.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, the present invention is for the operating circuit of sinusoidal wave constant-current dimmer, integrated and collaborative by two kinds of circuit of AC-DC with DC-AC
Work, has minimizing harmonic pollution, the advantage supporting frequency transformation.
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes of the application
Point, it is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is circuit diagram of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As it is shown in figure 1, the present invention is for the operating circuit of sinusoidal wave constant-current dimmer, including inductance L1, electric capacity C3, inductance
L2, electric capacity C4 and three parallel branches；One end of inductance L1 is connected on live wire L, and the other end is divided into three parallel branches；Electric capacity
C3 one end is connected on one end being connected with live wire L of inductance L1, and the other end connects neutral conductor N.Article three, in parallel branch, first
Branch road includes N-channel type power field effect transistor Q1, N-channel type power field effect transistor Q2, N-channel type power field effect
Transistor Q3, N-channel type power field effect transistor Q4, diode D3, diode D4, diode D5, diode D6.N-channel
The drain electrode of type power field effect transistor Q1 connects the other end of inductance L1, and gate pole is connected with external control signal；Diode D3
Negative pole be connected with the drain electrode of N-channel type power field effect transistor Q1, the positive pole of diode D3 and N-channel type power field effect
The source electrode of transistor Q1 is connected.The source electrode of N-channel type power field effect transistor Q2 and N-channel type power field effect transistor Q1
Source electrode be connected, gate pole access external control signal；The positive pole of diode D4 and the source of N-channel type power field effect transistor Q2
The most connected, the negative pole of diode D4 is connected with the drain electrode of N-channel type power field effect transistor Q2.N-channel type power field effect
The drain electrode of transistor Q4 is connected with the drain electrode of N-channel type power field effect transistor Q2, and gate pole accesses external control signal；Two poles
The negative pole of pipe D5 is connected with the drain electrode of N-channel type power field effect transistor Q3, the positive pole of diode D5 and N-channel type power field
The source electrode of effect transistor Q3 is connected.The source electrode of N-channel type power field effect transistor Q4 and N-channel type power field effect crystal
The source electrode of pipe Q3 is connected, and gate pole accesses external control signal, and drain electrode is connected with inductance L2；The positive pole of diode D6 and N-channel type
The source electrode of power field effect transistor Q4 is connected, the negative pole of diode D6 and the drain electrode of N-channel type power field effect transistor Q4
It is connected.Article three, in parallel branch, the second branch road includes diode D1, diode D7, N-channel type power field effect transistor Q5.
The positive pole of diode D1 connects inductance L1, and negative pole is connected with the drain electrode of N-channel type power field effect transistor Q5；Diode D7's
Negative pole is connected with the drain electrode of N-channel type power field effect transistor Q5, and the positive pole of diode D7 is brilliant with N-channel type power field effect
The source electrode of body pipe Q5 is connected；The gate pole of N-channel type power field effect transistor Q5 accesses external control signal, source electrode and inductance L2
It is connected.Article three, in parallel branch, the 3rd branch road includes diode D2, diode D8, N-channel type power field effect transistor Q6.
The negative pole of diode D2 connects inductance L1, and positive pole is connected with the source electrode of N-channel type power field effect transistor Q6；Diode D8's
Positive pole pole is connected with the source electrode of N-channel type power field effect transistor Q5, the negative pole of diode D8 and N-channel type power field effect
The drain electrode of transistor Q6 is connected；The gate pole of N-channel type power field effect transistor Q6 accesses external control signal, drain electrode and inductance
L2 is connected.The other end of inductance L2 is connected on live wire L；Electric capacity C4 one end connects neutral conductor N, the other end and inductance L2 with fire
One end that line L is connected is connected.This system is the integrated of AC-DC and DC-AC two kinds conversion.AC-DC is a kind of efficient rectified current
Road, can also carry out high power factor correction, be substantially reduced the power supply harmonic pollution to electrical network while completing rectification.DC-AC is
A kind of efficient T-shaped three-level inverter circuit, while sine wave output electric current, frequency also arbitrarily can control according to loading demand
And conversion frequency.
Further, electric capacity C1 and electric capacity C2 is also included；Electric capacity C1 one end is connected to diode D1 and N-channel type power field
On the common port of effect transistor Q5, the other end is connected to N-channel type power field effect transistor Q2 and imitates with N-channel type power field
Answer on the common port of transistor Q3；Electric capacity C2 one end is connected to N-channel type power field effect transistor Q2 and N-channel type power field
On the common port of effect transistor Q3, the other end is connected to the public of diode D2 and N-channel type power field effect transistor Q6
On end；The common port of electric capacity C1 with C2 is also connected with neutral conductor N.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all should comprise
Within protection scope of the present invention.
Claims (2)
1. for the operating circuit of sinusoidal wave constant-current dimmer, it is characterised in that include inductance L1, electric capacity C3, inductance L2, electric capacity
C4 and three parallel branches；One end of inductance L1 is connected on live wire L, and the other end is divided into three parallel branches；Electric capacity C3 one end
Being connected on one end being connected with live wire L of inductance L1, the other end connects neutral conductor N；
Article three, in parallel branch, the first branch road includes that N-channel type power field effect transistor Q1, N-channel type power field effect are brilliant
Body pipe Q2, N-channel type power field effect transistor Q3, N-channel type power field effect transistor Q4, diode D3, diode D4,
Diode D5, diode D6;
The drain electrode of N-channel type power field effect transistor Q1 connects the other end of inductance L1, and gate pole is connected with external control signal；
The negative pole of diode D3 is connected with the drain electrode of N-channel type power field effect transistor Q1, the positive pole of diode D3 and N-channel type merit
The source electrode of rate field-effect transistor Q1 is connected；
The source electrode of N-channel type power field effect transistor Q2 is connected with the source electrode of N-channel type power field effect transistor Q1, gate pole
Access external control signal；The positive pole of diode D4 is connected with the source electrode of N-channel type power field effect transistor Q2, diode D4
Negative pole be connected with the drain electrode of N-channel type power field effect transistor Q2；
The drain electrode of N-channel type power field effect transistor Q4 is connected with the drain electrode of N-channel type power field effect transistor Q2, gate pole
Access external control signal；The negative pole of diode D5 is connected with the drain electrode of N-channel type power field effect transistor Q3, diode D5
Positive pole be connected with the source electrode of N-channel type power field effect transistor Q3；
The source electrode of N-channel type power field effect transistor Q4 is connected with the source electrode of N-channel type power field effect transistor Q3, gate pole
Accessing external control signal, drain electrode is connected with inductance L2；The positive pole of diode D6 is with N-channel type power field effect transistor Q4's
Source electrode is connected, and the negative pole of diode D6 is connected with the drain electrode of N-channel type power field effect transistor Q4；
Article three, in parallel branch, the second branch road includes diode D1, diode D7, N-channel type power field effect transistor Q5；
The positive pole of diode D1 connects inductance L1, and negative pole is connected with the drain electrode of N-channel type power field effect transistor Q5；Diode
The negative pole of D7 is connected with the drain electrode of N-channel type power field effect transistor Q5, and the positive pole of diode D7 is imitated with N-channel type power field
The source electrode answering transistor Q5 is connected；The gate pole of N-channel type power field effect transistor Q5 accesses external control signal, source electrode and electricity
Sense L2 is connected；
Article three, in parallel branch, the 3rd branch road includes diode D2, diode D8, N-channel type power field effect transistor Q6；
The negative pole of diode D2 connects inductance L1, and positive pole is connected with the source electrode of N-channel type power field effect transistor Q6；Diode
The positive pole pole of D8 is connected with the source electrode of N-channel type power field effect transistor Q5, the negative pole of diode D8 and N-channel type power field
The drain electrode of effect transistor Q6 is connected；The gate pole of N-channel type power field effect transistor Q6 accesses external control signal, drain electrode with
Inductance L2 is connected；
The other end of inductance L2 is connected on live wire L；Electric capacity C4 one end connects neutral conductor N, the other end and inductance L2 with live wire L
The one end being connected is connected.
A kind of operating circuit for sinusoidal wave constant-current dimmer the most according to claim 1, it is characterised in that also include
Electric capacity C1 and electric capacity C2；Electric capacity C1 one end is connected on the common port of diode D1 and N-channel type power field effect transistor Q5,
The other end is connected on the common port of N-channel type power field effect transistor Q2 and N-channel type power field effect transistor Q3；Electricity
Hold C2 one end to be connected on the common port of N-channel type power field effect transistor Q2 and N-channel type power field effect transistor Q3,
The other end is connected on the common port of diode D2 and N-channel type power field effect transistor Q6；The common port of electric capacity C1 Yu C2
Also it is connected with neutral conductor N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610760810.6A CN106301001A (en) | 2016-08-30 | 2016-08-30 | Operating circuit for sinusoidal wave constant-current dimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610760810.6A CN106301001A (en) | 2016-08-30 | 2016-08-30 | Operating circuit for sinusoidal wave constant-current dimmer |
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| Publication Number | Publication Date |
|---|---|
| CN106301001A true CN106301001A (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610760810.6A Pending CN106301001A (en) | 2016-08-30 | 2016-08-30 | Operating circuit for sinusoidal wave constant-current dimmer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203327305U (en) * | 2013-05-30 | 2013-12-04 | 中国民用航空总局第二研究所 | Bridge-free PFC plus T type three-level inversion frequency-conversion light modulator |
| CN103944148A (en) * | 2014-04-17 | 2014-07-23 | 华为技术有限公司 | T-type three-level inverter protecting method and device and inverter circuit |
| CN104377659A (en) * | 2013-08-16 | 2015-02-25 | 力博特公司 | Wave sealing-wave unsealing method and device, wave unsealing method and device and inverter circuit |
| CN206004535U (en) * | 2016-08-30 | 2017-03-08 | 成都英格瑞德电气有限公司 | A kind of controlled constant-current dimmer operating circuit of frequency |
-
2016
- 2016-08-30 CN CN201610760810.6A patent/CN106301001A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203327305U (en) * | 2013-05-30 | 2013-12-04 | 中国民用航空总局第二研究所 | Bridge-free PFC plus T type three-level inversion frequency-conversion light modulator |
| CN104377659A (en) * | 2013-08-16 | 2015-02-25 | 力博特公司 | Wave sealing-wave unsealing method and device, wave unsealing method and device and inverter circuit |
| CN103944148A (en) * | 2014-04-17 | 2014-07-23 | 华为技术有限公司 | T-type three-level inverter protecting method and device and inverter circuit |
| CN206004535U (en) * | 2016-08-30 | 2017-03-08 | 成都英格瑞德电气有限公司 | A kind of controlled constant-current dimmer operating circuit of frequency |
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Application publication date: 20170104 |