CN105813260B - Adjuster and adjusting method are cut after two line styles - Google Patents
Adjuster and adjusting method are cut after two line styles Download PDFInfo
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- CN105813260B CN105813260B CN201610206302.3A CN201610206302A CN105813260B CN 105813260 B CN105813260 B CN 105813260B CN 201610206302 A CN201610206302 A CN 201610206302A CN 105813260 B CN105813260 B CN 105813260B
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- circuit
- alternating current
- control circuit
- zero cross
- drive control
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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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Electronic Switches (AREA)
Abstract
The present invention cuts adjuster and adjusting method after providing a kind of two line styles, and adjuster is cut after two line styles includes alternating current switching circuit, zero cross detection circuit, drive control circuit and power supply circuit.Alternating current switching circuit is connected with load circuit.The input current of zero cross detection circuit detection exchange, zero cross signal is exported when input current zero crossing.Drive control circuit connects alternating current switching circuit and zero cross detection circuit, within an input current cycle, alternating current switching circuit conducting is driven when drive control circuit receives zero cross signal, load in access circuit, driving control circuit output signal ends alternating-current switch after delay a period of time, for a period of time less than or equal to the half period of input current.Power supply circuit connects alternating current switching circuit, zero cross detection circuit and drive control circuit respectively.
Description
Technical field
The present invention relates to LED control fields, and adjuster and adjusting method are cut after more particularly to a kind of two line styles.
Background technology
The present light modulator overwhelming majority is dimmed using silicon-controlled, is known as controllable silicon dimmer.Controllable silicon dimmer
Be a kind of preceding cut type adjuster its to traditional resistive load, such as incandescent lamp is completely compatible and is imitated with preferable light modulation
Fruit.However, with the popularization and development of LED light source, and incandescent lamp is eliminated, and market needs substantial amounts of Novel light modulator to adjust
Save the ligthing paraphernalia of the high-luminous-efficiencies such as substantial amounts of LED light, energy-saving lamp.
Traditional controllable silicon dimmer is a kind of Delayed conducting, and the device of zero-crossing switching, i.e., input in controlled silicon conducting
Voltage is larger, and the electric current in load is larger.For the low-voltage devices such as LED light, the electric current of larger load is easy to make to bear
Carry damage and cause the accident.Further, it is silicon-controlled itself only to there is firing current, it is not completely off the energy of electric current
Power.And the lamps and lanterns such as LED light have a lowest starting voltage value in itself, when input voltage starts under magnitude of voltage at it
Wait, lamp will extinguish, and lamps and lanterns will be in show high-impedance state.As long as at this time have in lamps and lanterns very small penetrating current by,
It will be made slowly to increase and reach startup magnitude of voltage, lamp knows the low frequency to go out again after a sudden strain of a muscle just occurs, the flash of light of low-light level shows
As being known as threshold values phosphere.
The content of the invention
The present invention is in order to overcome existing LED dimmer easily to damage load or threshold value phosphere occur, there is provided one
Passing zero trigger is planted, adjuster and adjusting method are cut after two line styles of time delayed turn-off.
To achieve these goals, the present invention cuts adjuster, including alternating current switching circuit, zero passage after providing a kind of two line styles
Detection circuit, drive control circuit and power supply circuit.Alternating current switching circuit is connected with load circuit.Zero cross detection circuit detection is handed over
The input current of stream, zero cross signal is exported when input current zero crossing.Drive control circuit connects alternating current switching circuit respectively
And zero cross detection circuit, within an input current cycle, drive exchange to open when drive control circuit receives zero cross signal
Circuit turn-on is closed, is loaded in access circuit, driving control circuit output signal makes alternating current switching circuit after a period of time that is delayed
Cut-off, for a period of time less than or equal to the half period of input current.Power supply circuit connects alternating current switching circuit, zero passage detection respectively
Circuit and drive control circuit.
In one embodiment of the invention, alternating current switching circuit is made of two VMOS pipe differential concatenations, two VMOS pipes
Control pole is connected with drive control circuit.
In one embodiment of the invention, cut after two line styles adjuster further include be connected to circuit input end and drive control electricity
Potentiometer between road, the resistance value on potentiometer determine the length of delay time.
In one embodiment of the invention, drive control circuit includes comparison control circuit, PWM generator circuit and driving electricity
Road, comparison control circuit connection potentiometer and zero cross detection circuit, comparison control circuit are believed according to the output of zero cross detection circuit
Number and potentiometer on resistance value control PWM generator circuit duty cycle.
In one embodiment of the invention, potentiometer is push button switch potentiometer.
In one embodiment of the invention, adjuster is cut after two line styles and further includes minimum spacing adjusting potentiometer, it is minimum spacing
Adjust potentiometer connection drive control circuit, the minimum spacing shortest time for adjusting potentiometer and determining delay.
In one embodiment of the invention, alternating current switching circuit and drive control circuit are formed on aluminum base circuit board.
In one embodiment of the invention, power supply circuit is connected in parallel on the both ends of alternating current switching circuit, in alternating current switching circuit
In deadline, power supply circuit obtains input voltage and direct current electricity output is formed after AC-DC is changed.
In one embodiment of the invention, the scope of input voltage is 220V~240V, frequency 50Hz.
Another aspect of the present invention cuts adjusting method after also providing a kind of two line styles, including：The input current of exchange is detected, when
Zero cross signal is exported during input current zero crossing；Within an input current cycle, drive control circuit receives zero cross signal simultaneously
Alternating current switching circuit conducting is driven, is loaded in access circuit；It is delayed after a period of time, drive control circuit output signal makes friendship
On-off circuit cut-off is flowed, for a period of time less than or equal to the half period of input current.
In conclusion cut adjuster and adjusting method compared with prior art after two line style provided by the invention, have with
Lower advantage：
AC input current is detected by setting zero cross detection circuit, the drive control when AC input current zero crossing
Circuit drives are turned on the alternating current switching circuit that load circuit is connected, and realize passing zero trigger.Conducting drives after delay a period of time
Control circuit driving alternating current switching circuit cut-off, the length of delay time will determine power of the output to load, that is, determines negative
The luminous flux (or illumination brightness) of load, achievees the purpose that light modulation.Adjuster is cut after two line style provided by the invention compared to traditional
Controllable silicon dimmer, it is turned in input current zero crossing, and the current value of output to load is smaller at this time, and load will not be produced
Raw larger impact, the performance safety of proof load on startup are stablized, load service life length.Further, compared to tradition
Controllable silicon dimmer, the cut-off of alternating current switching circuit can be achieved load current and complete switches off, and effectively prevent LED lamp threshold
It is worth the generation of phosphere.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly,
And coordinate attached drawing, it is described in detail below.
Brief description of the drawings
Fig. 1 cuts the circuit diagram of adjuster after showing two line styles of one embodiment of the invention offer.
Fig. 2 cuts the sequential of input voltage waveform and output voltage waveforms in adjuster after showing two line styles shown in Fig. 1
Figure.
Embodiment
Traditional controllable silicon dimmer is due to its Delayed conducting, the characteristic of zero-crossing switching so that it is in conducting in load
With larger firing current.For low-voltage devices such as LED lamps, it is silicon-controlled can be to LED in larger current caused by conducting
Lamps and lanterns cause to impact, and bring it about damage.Further, since complete switching off for electric current can not be realized during silicon-controlled cut-off, the characteristic
It will make to have the LED lamp of low start voltage the problem of threshold value flash of light occur.In view of this, applicant by studying for a long time
A kind of passing zero trigger, time delayed turn-off are provided afterwards, and adjuster is cut after two line styles of load current can be complete switched off when off
And adjusting method.
Fig. 1 cuts the circuit diagram of adjuster after showing two line styles of one embodiment of the invention offer.Fig. 2 show figure
The sequence diagram of input voltage waveform and output voltage waveforms in adjuster is cut after two line styles shown in 1.Also referring to Fig. 1 and figure
2.L-IN is electric power incoming line in Fig. 1, and L-OUT is power outlet, and N is zero-power line.In fig. 2, UL is the alternating current of input
Signal is pressed, Ulout is the output voltage signal after cutter after two line styles.
As shown in Figure 1, adjuster is cut after two line style provided in this embodiment includes alternating current switching circuit 1, zero passage detection electricity
Road 2, drive control circuit 3 and power supply circuit 4.Alternating current switching circuit 1 is connected with load circuit.The detection of zero cross detection circuit 2 is handed over
The input current of stream, zero cross signal is exported when input current zero crossing.Drive control circuit 3 connects alternating current switching circuit respectively
1 and zero cross detection circuit 2, within an input current cycle, exchange is driven when drive control circuit 3 receives zero cross signal
On-off circuit 1 turns on, and loads in R access circuits, and drive control circuit 3, which exports signal, after a period of time that is delayed makes alternating-current switch
Circuit 1 ends, for a period of time less than or equal to the half period of input current.Power supply circuit 4 connect respectively alternating current switching circuit 1,
Zero cross detection circuit 2 and drive control circuit 3.
The present invention is not limited in any way the concrete structure of zero cross detection circuit 2.As long as it can realize zero crossing detection function
Any available circuit is used equally for the present invention.In this present embodiment, the scope of input voltage is 220V~240V, and frequency is
50Hz.However, the present invention is not limited in any way this.
Cut after two line style provided in this embodiment in adjuster, input current is detected by zero cross detection circuit 2, defeated
When entering current zero-crossing point, alternating current switching circuit 1 turns on.Input current value is smaller at this time, that is, flow through load R electric current it is smaller, no
Can to load R cause to impact, load can clean boot, there is good security performance.One section of the conducting of alternating current switching circuit 1 delay
It will end after time, in actual use, user can set different delay times according to the different use environments of load R.
In this present embodiment, it is LED lamp to load R.However, the present invention is not limited in any way this.In other embodiments, the present invention
It adjuster be provided after two line styles provided can be equally used for adjusting the product such as electric fan and (need to configure corresponding component, do not exist
Described in this example).
Specifically, energy saving to achieve the purpose that when ambient light is brighter, the brightness of LED lamp can be relatively at this time
It is low, the shorter time that is delayed is set at this time, i.e., the power exported in one cycle to LED lamp is relatively low.And in ambient light
When line is dark, due to needing preferable illuminance, need output larger to the power in LED lamp at this time, it is corresponding to set
The time for putting delay is longer.
In this present embodiment, adjuster is cut after two line styles to be included being connected between circuit input end and drive control circuit 2
Potentiometer 5, the resistance value on potentiometer 5 determines the length of delay time.Drive control circuit 3 include comparison control circuit 31,
PWM generator circuit 32 and drive circuit 33.Comparison control circuit 31 connects potentiometer 5 and zero cross detection circuit 2, compares control
Circuit 31 controls the duty of PWM generator circuit 32 according to the resistance value exported on signal and potentiometer 5 of zero cross detection circuit 2
Than.In actual use, user only need to can be real by adjusting the gear (different gears corresponds to different resistance values) of potentiometer 5
The control of existing delay time, that is, realize the light modulation of LED lamp.
Describe in detail below with reference to Fig. 1 to the principle dimmed using potentiometer 5 and zero cross detection circuit 2.
When input current signal zero crossing, zero cross detection circuit 2 exports zero cross signal.Due to being influenced by load characteristic, such as when negative
Carry for inductive load when, can there are phase difference, zero cross detection circuit 2 between the zero signal on the voltage and electric current of input circuit
The zero crossing of the automatic detecting circuit electric current of meeting, comparison control circuit 31 output signal to PWM generator circuit 32, PWM generator
Circuit 32 exports Continuity signal to drive circuit 33, drive circuit 33 and drives alternating current switching circuit 1 to turn on.When load is resistive negative
During load, the zero cross signal that zero cross detection circuit 2 detects is input voltage zero-acrross ing moment, and there is no phase difference between the two.
After alternating current switching circuit 1 turns on, comparison control circuit 31 judges the resistance value of potentiometer 5, specifically judges
The resistance value of the access circuit part of potentiometer 5 accounts for the percentage of potentiometer resistance, and comparison control circuit 31 is defeated according to this percentage
Go out pick-off signal to PWM generator circuit 32, realize the control of pwm signal duty cycle, that is, when realizing that alternating current switching circuit 1 is delayed
Between control.Implementation can be：One charging capacitor connected with potentiometer 5 is set in comparison control circuit 31, compares control
Circuit 31 processed obtains the magnitude of voltage on charging capacitor, when the magnitude of voltage reaches the voltage threshold of setting, comparison control circuit 31
Output pick-off signal to PWM generator circuit 32, alternating current switching circuit 1 ends, charging capacitor electric discharge.However, the present invention is to this
It is not limited in any way.Specifically, when potentiometer 5 10 accesses circuit, charging capacitor reaches voltage threshold at this time
Time is R1*C*10%, and wherein R1 is the resistance value of locator 5, and C is the capacitance of charging capacitor, i.e. alternating current switching circuit 1 is led
Turned off after logical R1*C*10%.And when potentiometer 5 absolutely accesses circuit, at this time charging capacitor reach voltage threshold when
Between be R1*C, i.e., alternating current switching circuit conducting R1*C after turn off.When carrying out circuit design, the half of input current signal can be set
Cycle is equal to R1*C, i.e., when all access circuits of potentiometer 5, LED lamp is up to high-high brightness.
In this present embodiment, potentiometer 5 is push button switch potentiometer.The potentiometer 5 of this kind of structure is being closed or opened
The position of lamplight brightness will not change during LED lamp.However, the present invention is not limited in any way the structure of potentiometer 5.
In actual use, when delay time very in short-term, LED lamp in dimming process it is possible that low-light level glisten
Phenomenon.To avoid the problem, in this present embodiment, adjuster is cut after two line styles and further includes minimum spacing adjusting potentiometer 6, it is minimum
Spacing adjusting potentiometer 6 connects drive control circuit 3, and in this present embodiment, control is compared in minimum spacing adjusting potentiometer 6 connection
Circuit 31.The minimum spacing shortest time for adjusting potentiometer 6 and determining delay.Specifically, when potentiometer 5 accesses circuit part
When resistance value is less than minimum spacing adjusting potentiometer 6, comparison control circuit 31 sends out output pick-off signal during delay R2*C to PWM
Raw device circuit 32, alternating current switching circuit 1 ends after R2*C is turned on, and wherein R2 is the minimum spacing resistance value for adjusting potentiometer.Most
The small spacing effect for adjusting potentiometer 6 is to adjust the minimum brightness of LED lamp, avoids LED lamp from being dodged in dimming scope
Light.In other embodiments, when load is the inductive loads such as electric fan, minimum delay time R2*C cannot be below
35%, no person will cause motor step-out phenomenon, produce high pressure self-induction pulse voltage and puncture alternating current switching circuit 1.
In this present embodiment, alternating current switching circuit 1 is made of two VMOS pipe differential concatenations, the control pole of two VMOS pipes
It is connected with drive control circuit 3.The alternating current switching circuit of this kind of structure can complete switch off electric current in cut-off, and LED is born
Load is not in phosphere.In addition, this kind of alternating current switching circuit not only minimizes switching damage, and improve load
Output waveform, reduces the dash current to load, has more preferable dimming effect.In practical applications, tune is cut after two line styles
Section device power is larger, and when such as reaching more than 400W, the power of two VMOS pipes also will be larger at this time, needs to solve to dissipate in design
The problem of hot.With more preferable heat dissipation effect, in this present embodiment, to set 3 shape of alternating current switching circuit 1 and drive control circuit
Into be both circuit board and the aluminum base circuit board of heat sink on.The design cuts adjuster after can reducing two line styles to greatest extent
Volume.However, the present invention is not limited in any way this.It can be dissipated in other embodiments using extra increase heat sink
Heat.
In this present embodiment, power supply circuit 4 is connected in parallel on the both ends of alternating current switching circuit 1, in the cut-off of alternating current switching circuit
In time, power supply circuit 4 obtains input voltage and direct current electricity output is formed after AC-DC is changed.Due to alternating current switching circuit 1
Turn on the voltage range that delay time is variable, which will cause power supply circuit 4 provided in this embodiment to have ultra-wide.However,
The present invention is not limited in any way the concrete structure of power supply circuit 4.In other embodiments, the DC power supply that can connect outside comes
Power for alternating current switching circuit 1, zero cross detection circuit 2 and drive control circuit 3.
Corresponding with cutting adjuster after above-mentioned two line style, the present embodiment cuts adjusting method after also providing a kind of two line styles,
Including：
The input current of exchange is detected, zero cross signal is exported when input current zero crossing；
Within an input current cycle, drive control circuit receives zero cross signal and drives alternating current switching circuit to turn on,
Load in access circuit；
Be delayed a period of time after, drive control circuit output signal end alternating-current switch, described a period of time be less than or
Equal to the half period of input current.
In conclusion cut after two line style provided by the invention adjuster and adjusting method by set zero cross detection circuit come
AC input current is detected, drive control circuit drives when AC input current zero crossing exchanges out with what load circuit was connected
Circuit turn-on is closed, realizes passing zero trigger.Drive control circuit driving alternating current switching circuit cut-off, prolongs after conducting delay a period of time
When the time length by determine output to load on power, that is, determine load luminous flux (or illumination brightness), reach light modulation
Purpose.Adjuster is cut after two line style provided by the invention and compares traditional controllable silicon dimmer, it is in input current zero crossing
When turn on, the current value of output to load is smaller at this time, will not produce larger impact to load, and proof load is on startup
Performance safety is stablized, load service life length.Further, cut compared to traditional controllable silicon dimmer, alternating current switching circuit
Complete switching off for load current only can be achieved, effectively prevent the generation of LED lamp threshold value phosphere.
Although the present invention is disclosed above by preferred embodiment, but is not limited to the present invention, this any known skill
Skill person, without departing from the spirit and scope of the present invention, can make a little change and retouch, therefore protection scope of the present invention is worked as
Subject to claims scope claimed.
Claims (7)
1. cut adjuster after a kind of two line styles, it is characterised in that including：
Alternating current switching circuit, connects with load circuit；
Zero cross detection circuit, detects the input current of exchange, and zero cross signal is exported when input current zero crossing；
Drive control circuit, connects the alternating current switching circuit and zero cross detection circuit respectively, within an input current cycle,
Alternating current switching circuit conducting is driven when the drive control circuit receives zero cross signal, is loaded in access circuit, delay
Control circuit output signal is driven to end alternating current switching circuit after a period of time, described a period of time is less than or equal to input electricity
The half period of stream；
Power supply circuit, connects the alternating current switching circuit, zero cross detection circuit and drive control circuit respectively；
Potentiometer, is connected between circuit input end and drive control circuit, and the resistance value on potentiometer determines the length of delay time
It is short；
The drive control circuit includes comparison control circuit, PWM generator circuit and drive circuit, the comparison control circuit
Connect the potentiometer and zero cross detection circuit, the comparison control circuit is according to the output signal and current potential of zero cross detection circuit
The duty cycle of resistance value control PWM generator circuit on device；
Minimum spacing adjusting potentiometer, the spacing comparison control electricity for adjusting potentiometer and connecting the drive control circuit of the minimum
Road, the minimum spacing shortest time for adjusting potentiometer and determining delay.
2. cut adjuster after two line style according to claim 1, it is characterised in that the alternating current switching circuit is by two
VMOS pipes differential concatenation forms, and the control pole of two VMOS pipes is connected with drive control circuit.
3. cut adjuster after two line style according to claim 1, it is characterised in that the potentiometer is push button switch electricity
Position device.
4. cut adjuster after two line style according to claim 1, it is characterised in that the alternating current switching circuit and driving are controlled
Circuit processed is formed on aluminum base circuit board.
5. cut adjuster after two line style according to claim 1, it is characterised in that the power supply circuit is connected in parallel on the friendship
The both ends of on-off circuit are flowed, within the deadline of alternating current switching circuit, power supply circuit obtains input voltage and changed through AC-DC
Direct current electricity output is formed afterwards.
6. cut adjuster after two line style according to claim 1, it is characterised in that the scope of the input voltage is 220V
~240V, frequency 50Hz.
7. cut adjusting method after a kind of two line styles, it is characterised in that including：
The input current of exchange is detected, zero cross signal is exported when input current zero crossing；
Within an input current cycle, drive control circuit receives zero cross signal and drives alternating current switching circuit to turn on, and loads
In access circuit；
Be delayed a period of time after, drive control circuit output signal end alternating current switching circuit, described a period of time be less than or
Equal to the half period of input current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206302.3A CN105813260B (en) | 2016-04-01 | 2016-04-01 | Adjuster and adjusting method are cut after two line styles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206302.3A CN105813260B (en) | 2016-04-01 | 2016-04-01 | Adjuster and adjusting method are cut after two line styles |
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| Publication Number | Publication Date |
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| CN105813260A CN105813260A (en) | 2016-07-27 |
| CN105813260B true CN105813260B (en) | 2018-04-27 |
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| CN201610206302.3A Active CN105813260B (en) | 2016-04-01 | 2016-04-01 | Adjuster and adjusting method are cut after two line styles |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106385745A (en) * | 2016-08-24 | 2017-02-08 | 宁波奇特电子科技有限公司 | Novel single-chip microcomputer light adjusting switch |
| CN208675579U (en) * | 2018-05-01 | 2019-03-29 | 上海晶丰明源半导体股份有限公司 | Power control circuit, drive system and chip |
| CN108738201B (en) | 2018-06-21 | 2024-04-30 | 上海晶丰明源半导体股份有限公司 | Control circuit, LED driving chip, LED driving system and LED driving method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001067828A1 (en) * | 2000-03-09 | 2001-09-13 | Mitsubishi Denki Kabushiki Kaisha | Lamp device and device for driving discharge lamp |
| CN1134101C (en) * | 2000-07-28 | 2004-01-07 | 上海新源变频电器有限公司 | Rectifying power supply apparatus |
| JP6195199B2 (en) * | 2014-04-03 | 2017-09-13 | パナソニックＩｐマネジメント株式会社 | Light control device |
| CN204069410U (en) * | 2014-04-18 | 2014-12-31 | Tcl-罗格朗国际电工（惠州）有限公司 | Two-wire system light adjusting circuit |
| CN205726514U (en) * | 2016-04-01 | 2016-11-23 | 温州沃斯托科技有限公司 | Two line style rear cutout actuators |
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Address after: 325000 Fourth Floor, 4855 Binhai Sandao, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province Patentee after: Wenzhou Wosituo Science & Technology Co., Ltd. Address before: 325000 Third Floor, No. 7, Phase II, Puzhou Industrial Zone, Wenzhou City, Zhejiang Province Patentee before: Wenzhou Wosituo Science & Technology Co., Ltd. |