CN104041188A - Two-line dimmer switch - Google Patents
Two-line dimmer switch Download PDFInfo
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- CN104041188A CN104041188A CN201280067041.1A CN201280067041A CN104041188A CN 104041188 A CN104041188 A CN 104041188A CN 201280067041 A CN201280067041 A CN 201280067041A CN 104041188 A CN104041188 A CN 104041188A
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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
- 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
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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
- H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
- H05B39/04—Controlling
- H05B39/041—Controlling the light-intensity of the source
- H05B39/044—Controlling the light-intensity of the source continuously
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
一种双线式调光开关，具备：主开闭电路(10)，其以三端双向交流开关(11)为主开关元件；频率检测电路(17)，其检测交流电源(2)的频率；辅助开闭电路(18)，其以晶闸管为辅助开关元件，在主开关元件未导通时流通负载电流；调光量设定电路(4)，其由用户来操作；以及控制电路(16)，其基于频率检测电路(17)的检测信号来检测交流电源(2)的频率并估计电压过零点，在第一定时开始输出用于使辅助开闭电路(18)导通的驱动信号，在比下一个估计出的电压过零点早规定时间的第二定时停止驱动信号的输出，在该双线式调光开关中，在负载电流值小而主开闭电路(10)变为非导通时，通过辅助开闭电路(18)继续流通负载电流。由此，即使在作为照明负载连接了LED灯泡的情况下也使LED灯泡的明亮度稳定，减少闪烁、波动。
A two-wire dimming switch, comprising: a main switching circuit (10), which uses a three-terminal bidirectional AC switch (11) as a main switching element; a frequency detection circuit (17), which detects the frequency of an AC power supply (2) ; an auxiliary switching circuit (18), which uses a thyristor as an auxiliary switching element, and flows a load current when the main switching element is not turned on; a dimming amount setting circuit (4), which is operated by a user; and a control circuit (16 ), which detects the frequency of the AC power supply (2) based on the detection signal of the frequency detection circuit (17) and estimates the voltage zero-crossing point, and starts outputting a driving signal for conducting the auxiliary switching circuit (18) at the first timing, The output of the driving signal is stopped at the second timing earlier than the next estimated voltage zero-crossing point for a predetermined time. In this two-wire dimming switch, when the load current value is small and the main switching circuit (10) becomes non-conductive When on, the load current continues to flow through the auxiliary switch circuit (18). As a result, even when an LED bulb is connected as a lighting load, the brightness of the LED bulb is stabilized, and flicker and fluctuation are reduced.
Description
Technical field
The present invention relates to a kind of for regulating the two-wire system dimmer switch of the lightness of lighting load.
Background technology
In the past, the light modulation of incandescent lamp bulb of take was object, used the dimmer switch of the thyristors such as three terminal bidirectional alternating-current switch to be practical.Fig. 8 represents to use the basic circuit structure (the first past case) of the two-wire system dimmer switch 50 of three terminal bidirectional alternating-current switch 51.This two-wire system dimmer switch 50 is connected in series with AC power 2 and lighting load (incandescent lamp bulb) 3.Two-wire system dimmer switch 50 comprises: three terminal bidirectional alternating-current switch 51, be connected in three terminal bidirectional alternating-current switch 51 gate electrode and for exporting such as diac (diac) (diac) 52, the variable resistance 53 being connected with the control member being operated by user, fixed resistance body 54, capacitor 55, filter element 56 etc. of gate drive signal.
In two-wire system dimmer switch 50, when turn on-switch 57, from AC power 2 via variable resistance 53 to capacitor 55 charging, three terminal bidirectional alternating-current switch 51 conductings when the both end voltage of capacitor 55 reaches the breakover voltage of diac 52.Then, three terminal bidirectional alternating-current switch 51 is in the voltage over zero extinguishing arc of AC power.That is,, by the half period of AC power, repeat to utilize triggering (conducting) and the self-extinction of arc (non-conduction) of the three terminal bidirectional alternating-current switch 51 that diac 52 realizes.Resistance value by regulating variable resistance 53 is carried out phase control during to the triggering of three terminal bidirectional alternating-current switch 51, can carry out light modulation to lighting load 3 thus.
The two-wire system dimmer switch 50 of the first past case carries out light modulation by changing the resistance value of variable resistance 53 to lighting load 3, so the loss that variable resistance 53 causes is large.Therefore in addition, owing to variable resistance 53 directly being applied to the voltage of AC power 2, cannot make variable resistance 53 self miniaturization, the miniaturization of two-wire system dimmer switch 50 is also limited.And when being connected in the miscellaneous equipment of identical AC power 2 and moving, AC power 2 produces variations in voltage, the lightness meeting moment ground change of lighting load 3.
In order to solve the problem points of the two-wire system dimmer switch 50 of above-mentioned the first past case, in Japanese kokai publication hei 11-67479 communique, proposed a kind ofly with microcomputer etc., to control the dimmer switch that makes the timing of thyristor conducting, exports the timing of gate drive signal.In addition, this dimmer switch is 3 line formulas, and Fig. 9 represents to be applied to the circuit structure (the second past case) of two-wire system dimmer switch.
In the two-wire system dimmer switch 60 of the second past case, on the gate electrode of three terminal bidirectional alternating-current switch 61, be connected with the primary side photoelectricity three terminal bidirectional alternating-current switch 63 of photoelectricity three terminal bidirectional alternating-current switch coupler 62.In addition, between other electrode of three terminal bidirectional alternating-current switch 61, be connected with rectification circuit 65, the electric power that carries out full-wave rectification gained through rectification circuit 65 is imported into power supply unit 66.The direct current power that utilization is converted to by power supply unit 66 carrys out drive control part 67.At this, rectification circuit 65 is applied the voltage of AC power 2, for example exchanges (AC) 100V.On the other hand, for example with direct current (DC) 3V～6V, carry out drive control part 67.Photoelectricity three terminal bidirectional alternating-current switch coupler 62 is by control part 67 and thyristor 61 light insulation.Control part 67, according to the resistance value of the variable resistance 68 being connected with the control member being operated by user, makes transistor 69 conductings in pre-stored timing in look-up table (look-up table).When transistor 69 conducting, electric current flows through the light-emitting diode 64 of the primary side of photoelectricity three terminal bidirectional alternating-current switch coupler 62,63 conductings of primary side photoelectricity three terminal bidirectional alternating-current switch.When primary side photoelectricity three terminal bidirectional alternating-current switch 63 conducting of photoelectricity three terminal bidirectional alternating-current switch coupler 62, load current starts to flow, and the grid voltage of three terminal bidirectional alternating-current switch 61 rises.When the grid voltage of three terminal bidirectional alternating-current switch 61 becomes threshold value when above, 61 conductings of three terminal bidirectional alternating-current switch, the electric current that flows to lighting load 3 from AC power 2 is from 63 changes of current of photoelectricity three terminal bidirectional alternating-current switch to three terminal bidirectional alternating-current switch 61 in two-wire system dimmer switch 60, and photoelectricity three terminal bidirectional alternating-current switch 63 becomes non-conduction.
In recent years, use LED (Light Emitting Diode: LED bulb light-emitting diode) is practical, to replace incandescent lamp bulb.Thereupon, LED bulb that especially can light modulation in LED bulb is practical.Incandescent lamp bulb is resistive element itself, and on the other hand, LED bulb consists of a plurality of LED elements and drive circuit thereof as shown in Figure 10.LED drive circuit 70 comprises: to alternating electromotive force carry out the rectification circuit 71, inductor 72 of rectification, for the capacitor 76 of accumulating the buffer condenser 73, LED array 77 of electric power, be connected in parallel with LED array 77, for (the Field Effect Transistor: field-effect transistor) 75 and drive IC 74 etc. of the FET to LED array 77 circulation constant currents.That is, LED bulb, as load, is the electronic circuit consisting of diode, IC.The load voltage of incandescent lamp bulb and the waveform of load current in 1/2 cycle of (a) expression AC power of Figure 11, (b) of Figure 11 represents the load voltage of LED bulb and the waveform of load current.The power factor of incandescent lamp bulb is 1, and voltage and electric current present almost identical waveform.On the other hand, the in the situation that of LED bulb, load current is mainly used in capacitor 73 to charge, and presents large value to moment, but diminish immediately in the conducting of three terminal bidirectional alternating-current switch.
If the LED bulb of wanting 50 pairs of two-wire system dimmer switchs with the first past case to present this specific character carries out brightness adjustment control, can produce following problem points.Figure 12 represents that the 50 pairs of LED bulbs of two-wire system dimmer switch with the first past case carry out the problem points in the situation of brightness adjustment control.As shown in figure 12, when 51 conducting of three terminal bidirectional alternating-current switch, the large load current that flows to moment, but diminish immediately.When the value of load current becomes while being less than the maintenance electric current of three terminal bidirectional alternating-current switch 51, three terminal bidirectional alternating-current switch 51 can self-extinctions of arc and become non-conduction.When three terminal bidirectional alternating-current switch 51 becomes the voltage drop of capacitor 73 when non-conduction, drive IC 74 is controlled the electric current that flows to FET75 is diminished.So the electric current that flows through LED array 77 tails off, the lightness of LED bulb reduces.In addition, when due to be superimposed on AC power 2 noise impact and when load current temporarily diminishes or owing to being connected in the action of miscellaneous equipment of identical AC power 2, AC power 2 produces variation in voltage as shown in Figure 13, the lightness of LED bulb reduces.
On the other hand, in the situation that the two-wire system dimmer switch 60 of the second past case, if continued to photoelectricity three terminal bidirectional alternating-current switch 63 circulating currents of the primary side of photoelectricity three terminal bidirectional alternating-current switch coupler 62, can make load current continue to flow.But, owing to there being the electric current of several mA～tens of mA to flow through photoelectricity three terminal bidirectional alternating-current switch 63, therefore in order to maintain long-time conducting, to consume a lot of electric power.Particularly, because LED bulb is in fact electronic circuit as above itself, power consumption is few, if therefore a lot of electric power of two-wire system dimmer switch 60 side consumption likely sinks into uncontrollable condition.
The present invention completes in order to solve the problem of above-mentioned past case, even if its object is to provide a kind of lightness that also makes LED bulb connected LED bulb as lighting load in the situation that stable and glimmer, fluctuate two-wire system dimmer switch few.
Summary of the invention
Two-wire system dimmer switch involved in the present invention and AC power and lighting load are connected in series, and it is characterized in that possessing:
Be transfused to the first splicing ear and second splicing ear of alternating electromotive force;
Main switching circuit, it is connected between above-mentioned the first splicing ear and above-mentioned the second splicing ear, take the first thyristor as main switch element;
Rectification circuit, it is connected between above-mentioned the first splicing ear and above-mentioned the second splicing ear;
Power circuit, it is connected in the DC side of above-mentioned rectification circuit, guarantees the internal electric source of above-mentioned two-wire system dimmer switch;
Frequency detection circuit, it is connected in the DC side of above-mentioned rectification circuit, and output is for detection of the detection signal of the regulation of the frequency of above-mentioned AC power;
The auxiliary circuit that opens and closes, it is connected in DC side or the AC of above-mentioned rectification circuit, take the second thyristor as auxiliary switch element, at above-mentioned main switch element carrying load current during conducting not, and output gate drive signal is so that above-mentioned main switch element or other thyristor conducting;
Light modulation amount initialization circuit, it is operated by user, for setting for regulating the light modulation amount of the lightness of above-mentioned lighting load; And
Control circuit, its above-mentioned detection signal based on from the output of said frequencies testing circuit detects the frequency of above-mentioned AC power, estimate the voltage over zero of above-mentioned AC power, what at the light modulation amount based on being set by above-mentioned light modulation amount initialization circuit and the voltage over zero that estimates, determine first regularly starts output for making the driving signal of above-mentioned auxiliary switching circuit turn-on, stops the output of above-mentioned driving signal in the second timing of the Zao stipulated time of voltage over zero estimating than the next one of the above-mentioned voltage over zero estimating.
In addition, preferably, also possesses accurate main switching circuit, the main switching circuit of this standard is according to the above-mentioned gate drive signal from above-mentioned auxiliary switching circuit output and conducting, after above-mentioned auxiliary switching circuit turn-on, at above-mentioned main switch element carrying load current during conducting not, and output is for making the driving signal of above-mentioned main switch element conducting.
In addition, preferably, above-mentioned main switch element is three terminal bidirectional alternating-current switch (triac),
It is auxiliary switch element that above-mentioned auxiliary switching circuit be take the thyristor (thyristor) of the DC side that is connected in above-mentioned rectification circuit.
Or preferably, above-mentioned main switch element is three terminal bidirectional alternating-current switch,
Above-mentioned auxiliary switching circuit take be connected in above-mentioned rectification circuit AC and with two thyristors that the polarity of above-mentioned AC power is correspondingly alternately switched on be auxiliary switch element.
In addition, preferably, it is switch element that the main switching circuit of above-mentioned standard be take photoelectricity three terminal bidirectional alternating-current switch coupler (photo-triac coupler), photoelectricity three terminal bidirectional alternating-current switch and the above-mentioned main switch element of the primary side of above-mentioned photoelectricity three terminal bidirectional alternating-current switch coupler are connected in parallel, and a side connecting terminals is connected to the gate terminal of above-mentioned main switch element, the light-emitting diode of the primary side of above-mentioned photoelectricity three terminal bidirectional alternating-current switch coupler and above-mentioned auxiliary switching circuit are connected in series
The maintenance current value of above-mentioned photoelectricity three terminal bidirectional alternating-current switch is less than the maintenance current value of above-mentioned three terminal bidirectional alternating-current switch.
Preferably, above-mentioned control circuit is when starting the brightness adjustment control of above-mentioned lighting load, and near the timing output of the regulation above-mentioned voltage over zero estimating is for making the initial driving signal of above-mentioned auxiliary switching circuit turn-on.
According to above-mentioned two-wire system dimmer switch, possess main switch element not during conducting carrying load current and output gate drive signal so that the auxiliary switching circuit of main switch element or other thyristor conducting, from based on voltage over zero and the light modulation amount set by light modulation amount initialization circuit, determine first be timed to than the next Zao stipulated time of voltage over zero second till regularly during continue output for making the auxiliary driving signal that opens and closes circuit turn-on, auxiliary switching circuit maintains conducting state.Therefore, even if lighting load is LED bulb and opens and closes the changes of current such as circuit and be less than the maintenance electric current of main switch element and main switching circuit becomes non-conductionly to load current value after main switching circuit from auxiliary at load current, also can continue carrying load current via the auxiliary circuit etc. of opening and closing.Its result, can make the lightness of LED bulb stable, reduces flicker, fluctuation.
Accompanying drawing explanation
Fig. 1 means the circuit diagram of the structure of the two-wire system dimmer switch that the first execution mode of the present invention is related.
Fig. 2 is the load voltage, load current of the LED bulb in the first execution mode and for making the oscillogram of the gate drive signal of the auxiliary thyristor conducting that opens and closes circuit.
Fig. 3 means that miscellaneous equipment is in the first embodiment on the load voltage of the LED bulb of the impact of load current, load current and for making the oscillogram of the gate drive signal of the auxiliary thyristor conducting that opens and closes circuit.
Fig. 4 means the circuit diagram of the structure of the two-wire system dimmer switch that the second execution mode of the present invention is related.
Fig. 5 means the circuit diagram of the structure of the two-wire system dimmer switch that the 3rd execution mode of the present invention is related.
Fig. 6 means the circuit diagram of the structure of the two-wire system dimmer switch that the 4th execution mode of the present invention is related.
Fig. 7 is the oscillogram of each portion in the control method of the related two-wire system dimmer switch of the 5th execution mode of the present invention.
Fig. 8 means the circuit diagram of the structure of the two-wire system dimmer switch that the first past case is related.
Fig. 9 means the circuit diagram of the structure of the two-wire system dimmer switch that the second past case is related.
Figure 10 means the circuit diagram of structure of the drive circuit of general LED bulb.
Figure 11 means the figure of incandescent lamp bulb and the load voltage of LED bulb and the difference of load current.
Figure 12 means in two-wire system dimmer switch in the past the figure that becomes the situation of three terminal bidirectional alternating-current switch self-extinction of arc while being less than the maintenance current value of three terminal bidirectional alternating-current switch when load current value.
Figure 13 means in two-wire system dimmer switch in the past the figure of the situation of the load voltage change of LED bulb owing to being connected in the load current of miscellaneous equipment of identical alternating current.
Embodiment
(the first execution mode)
The two-wire system dimmer switch that the first execution mode of the present invention is related is described.Fig. 1 represents the circuit structure of the two-wire system dimmer switch 1A that the first execution mode is related.Two-wire system dimmer switch 1A and AC power 2 and lighting load 3 are connected in series.Both can with variable resistance 4, possess the switch of lighting and extinguishing 5 of controlling lighting load 3 with the light modulation of two-wire system dimmer switch 1A with being integral, also switch 5 can being set in addition.In the following description, exemplified with being provided with dividually the situation of switch 5 with two-wire system dimmer switch 1A.
The first splicing ear 1a of two-wire system dimmer switch 1A and the second splicing ear 1b are connected in AC power 2 or lighting load 3 and switch 5.Between the first splicing ear 1a and the second splicing ear 1b, be connected with and take the main switching circuit 10 that three terminal bidirectional alternating-current switch grade in an imperial examination semiconductor switch element is main switch element 11.In addition, with main switching circuit 10 in parallel, between the first splicing ear 1a and the second splicing ear 1b, be connected with rectification circuit 12, on rectification circuit 12, be connected with for guaranteeing the power circuit 13 of the internal power of this two-wire system dimmer switch 1A.Power circuit 13 comprises: the switching circuit consisting of the Zener diode 13c of the base stage of being carried out first crystal tube elements 13a and transistor seconds element 13b that Darlington (Darlington) connects, being connected in transistor seconds element 13b and resistive element 13d etc.; For the control circuit 16 to being formed by microprocessor etc., supply with the constant voltage circuit (three terminal adjusters etc.) 14 of the constant-voltage power of direct currents; And buffer condenser 15 etc.
When switch 5 is connected, the pulsating current after rectification circuit 12 rectifications is imported into power circuit 13, from power circuit, exports its output voltage by the electric power of the Zener voltage domination of Zener diode 13c.This electric power charges to buffer condenser 15, and for example, is supplied to control circuit 16 be reduced to the voltage (3V) of regulation by constant voltage circuit 14 after.At this, as long as make the resistance value of the resistive element 13d of power circuit 13, for high, to transistor seconds element 13b, move the value of degree of required current flowing, just can by via Zener diode 13c, flow to the current value of (ground) suppress lowly, thereby can realize the reduction of power consumption.
On the DC side lead-out terminal of rectification circuit 12, be connected with the frequency detection circuit 17 for detection of the frequency of AC power 2, the detection signal of the regulation of exporting from frequency detection circuit 17 is imported into control circuit 16.In addition, on the DC side lead-out terminal of rectification circuit 12, be connected with and take the auxiliary switching circuit 18 that second thyristors such as thyristor (thyristor) are auxiliary switch element, this is auxiliary open and close circuit 18 till for main switch element 11 conductings at main switching circuit 10 during or main switch element 11 not during conducting to lighting load 3 circulating currents.On control circuit 16, be connected with the light modulation amount initialization circuit 4 being formed by variable resistance etc. being operated by user.In addition, in the following description, as required, main switch element is called to three terminal bidirectional alternating-current switch 11, will assists switching circuit or auxiliary switch element to be called thyristor 18.
Frequency detection circuit 17 is configured to the base stage that the pulsating current from rectification circuit 12 outputs is input to transistor unit 17a, correspondingly from frequency detection circuit 17 to control circuit 16, inputs the detection signal of regulation with the frequency of AC power 2.Control circuit 16 detects the frequency (50Hz or 60Hz) of AC power 2 according to the detection signal of frequency detection circuit 17, and based on this estimated voltage zero crossing.Then, the gate terminal input gate drive signal to thyristor 18 based on detected frequency and the voltage over zero that estimates etc.Fig. 2 represents each waveform as load voltage, load current and gate drive signal in 1/2 cycle of the AC power 2 in the situation of lighting load 3 by LED bulb.About the rising (the first timings of thyristor 18 conductings) of gate drive signal, the resistance value based on light modulation amount initialization circuit (variable resistance) 4 decides pre-stored look-up table search in control circuit 16.The decline of gate drive signal (thyristor 18 becomes the second non-conduction timing) is for example set to, than Δ t of Zao stipulated time of the voltage over zero of AC power 2 (1ms).This official hour Δ t be for example for by control circuit 16 based on estimate time enough for next voltage over zero from the detection signal of frequency detection circuit 17.
The concrete action of the two-wire system dimmer switch 1A that the first execution mode is related then, is described.Think that under the state disconnecting at switch 5, the electric charge of buffer condenser 15 is nearly all discharged, control circuit 16 is not brought into play function.At this, when switch 5 is connected, the pulsating current from rectification circuit 12 output examples as full-wave rectification.Thus, buffer condenser 15 is recharged, and to control circuit 16, supplies with direct current power from constant voltage circuit 14, and control circuit 16 starts.Therewith concurrently, from frequency detection circuit 17 to control circuit 16 input detection signals, so control circuit 16 detects the frequency of AC power 2 and estimates its voltage over zero.Then, the resistance value of control circuit 16 based on light modulation amount initialization circuit (variable resistance) 4 regularly starts to export gate drive signal (making gate drive signal increase) first.When gate drive signal is imported into the gate terminal of thyristor 18, thyristor 18 conductings, start to lighting load 3 circulating currents.In addition, the electric current that flows through thyristor 18 also flows through the gate electrode of three terminal bidirectional alternating-current switch 11, therefore when its voltage and current becomes the grid voltage threshold value of three terminal bidirectional alternating-current switch 11 and On current three terminal bidirectional alternating-current switch 11 conductings when above, load current is from thyristor 18 changes of current to three terminal bidirectional alternating-current switch 11.When 11 conducting of three terminal bidirectional alternating-current switch, current flowing hardly in rectification circuit 12, current flowing hardly in thyristor 18, power circuit 13 and frequency detection circuit 17.In power circuit 13, no longer during current flowing, start to emit electric power from buffer condenser 15, guarantee thus the driving electric power of control circuit 16.Now, continue the gate electrode input gate drive signal from control circuit 16 to thyristor 18, so thyristor 18 is in conducting state.
In the situation that lighting load 3 is LED bulb, in thyristor 18 or 11 conductings of three terminal bidirectional alternating-current switch, load current moment ground presents large value, but diminishes immediately as described above.Then, when the value of load current becomes while being less than the maintenance electric current of three terminal bidirectional alternating-current switch 11, three terminal bidirectional alternating-current switch 11 can self-extinctions of arc and become non-conduction, but because thyristor 18 is in conducting state, so load current continues mobile by thyristor 18.Then, control circuit 16 is regularly stopping the output (gate drive signal is declined) of gate drive signal than second of Δ t of Zao stipulated time of the voltage over zero of AC power 2.In this stage, load current flows hardly, non-conduction even if thyristor 18 becomes, and also can produce hardly the variation of the lightness of lighting load 3.When thyristor 18 becomes when non-conduction, from the pulsating current of rectification circuit 12 output from thyristor 18 changes of current to power circuit 13 with frequency detection circuit 17, therefore control circuit 16 can be based on estimate the next voltage over zero of AC power 2 from the detection signal of frequency detection circuit 17, thereby can take the voltage over zero that estimates controls the timing that starts to export next gate drive signal as benchmark.
Like this, two-wire system dimmer switch 1A possess for during till the main switch element at main switching circuit 10 (three terminal bidirectional alternating-current switch) 11 conductings or main switch element 11 not during conducting to the auxiliary switching circuit (thyristor) 18 of lighting load 3 circulating currents, therefore even if the value of load current becomes and is less than the maintenance electric current of three terminal bidirectional alternating-current switch 11 and three terminal bidirectional alternating-current switch 11 becomes non-conduction, because thyristor 18 is in conducting state, so load current also can continue to flow by thyristor 18.Its result, the lightness of LED bulb is stable, can produce macroscopic flicker, fluctuation hardly.In addition, even in the situation that the maximum of load current is less than the maintenance electric current of three terminal bidirectional alternating-current switch 11, also can to load, continue circulating current via auxiliary circuit (thyristor) 18 that open and close.And, by regularly stopping, to the gate drive signal of the gate electrode input of thyristor 18, can correctly estimating the next voltage over zero of AC power 2 than second of Δ t of Zao stipulated time of the voltage over zero of AC power 2.In addition, as shown in Figure 3, even if be connected in the miscellaneous equipment of identical AC power 2, move, because load current continues to flow via thyristor 18, so the lightness of lighting load 3 also can change hardly.In addition, load voltage waveform also less changes.In addition,, as three terminal bidirectional alternating-current switch 11, it keeps the little device of current value certainly special choice for use.
(the second execution mode)
The two-wire system dimmer switch that the second execution mode of the present invention is related is described.Fig. 4 represents the circuit structure of the two-wire system dimmer switch 1B that the second execution mode is related.Two-wire system dimmer switch 1B is that the photoelectricity three terminal bidirectional alternating-current switch coupler 20 appending as the main switching circuit of standard on the related two-wire system dimmer switch 1A of above-mentioned the first execution mode forms.Primary side photoelectricity three terminal bidirectional alternating-current switch 21 and the main switching circuit (three terminal bidirectional alternating-current switch) 11 of photoelectricity three terminal bidirectional alternating-current switch coupler 20 are connected in parallel, and primary side light-emitting diode 22 is connected in series with auxiliary opening/closing portion (thyristor) 18.Other structure is identical.As this photoelectricity three terminal bidirectional alternating-current switch 21, selected it to keep current value to be less than the device of maintenance current value of the three terminal bidirectional alternating-current switch 11 of main switching circuit.
The concrete action of the two-wire system dimmer switch 1B that the second execution mode is related then, is described centered by difference.When voltage over zero extinguishing arc in AC power 2 of three terminal bidirectional alternating-current switch 11 and photoelectricity three terminal bidirectional alternating-current switch 21, current direction rectification circuit 12, at the first timing gate drive signal of regulation, be imported into afterwards the gate terminal of thyristor 18, thyristor 18 conductings, load current flows by thyristor 18.Now, the primary side light-emitting diode 22 of photoelectricity three terminal bidirectional alternating-current switch coupler 20 is luminous, and gate drive signal is imported into the gate terminal of primary side photoelectricity three terminal bidirectional alternating-current switch 21,21 conductings of photoelectricity three terminal bidirectional alternating-current switch.When 21 conducting of photoelectricity three terminal bidirectional alternating-current switch, the load current change of current is to photoelectricity three terminal bidirectional alternating-current switch 21.At this, little and while being less than the maintenance current value of three terminal bidirectional alternating-current switch 11 of main switching circuit at load current value, the three terminal bidirectional alternating-current switch 11 not conductings of main switching circuit, load current in statu quo flows by the photoelectricity three terminal bidirectional alternating-current switch 21 as accurate main switching circuit.On the other hand, when load current value large and become the maintenance current value of three terminal bidirectional alternating-current switch 11 of main switching circuit when above, three terminal bidirectional alternating-current switch 11 conductings of main switching circuit, three terminal bidirectional alternating-current switch 11 is arrived in the load current change of current.In the situation that lighting load 3 is LED bulb, when the value of load current becomes while being less than the maintenance electric current of three terminal bidirectional alternating-current switch 11, three terminal bidirectional alternating-current switch 11 can self-extinctions of arc and become non-conduction, but thyristor 18 conductings, the temporary transient change of current of load current is to thyristor 18.Then, the primary side light-emitting diode 22 of photoelectricity three terminal bidirectional alternating-current switch coupler 20 is luminous, 21 conductings of primary side photoelectricity three terminal bidirectional alternating-current switch, and the load current change of current is to photoelectricity three terminal bidirectional alternating-current switch 21.The maintenance current value of photoelectricity three terminal bidirectional alternating-current switch 21 is less than the maintenance current value of three terminal bidirectional alternating-current switch 11 as described above, therefore can stably continue carrying load current.
The related two-wire system dimmer switch 1B two-wire system dimmer switch 1A related with the first execution mode of the second execution mode compares, appended photoelectricity three terminal bidirectional alternating-current switch coupler 20 as accurate main switching circuit, therefore structure is slightly complicated, and it becomes the main cause that cost correspondingly rises.Yet, even three terminal bidirectional alternating-current switch 11 become non-conduction after, load current is the photoelectricity three terminal bidirectional alternating-current switch 21 of Main Current over commutation circuit 12 upstream sides (AC) also, and load current, without diode bridge, has therefore been eliminated the loss that diode bridge causes.Its result, the variation of the lightness of LED bulb becomes very little, can produce macroscopic flicker, fluctuation hardly.
(the 3rd execution mode)
The related two-wire system dimmer switch of the 3rd execution mode of the present invention is described.Fig. 5 represents the circuit structure of the two-wire system dimmer switch 1C that the 3rd execution mode is related.Two-wire system dimmer switch 1C obtains as follows: two auxiliary circuit (thyristor) 18a of switching and 18b are set in the related two-wire system dimmer switch 1A of above-mentioned the first execution mode, the anodic bonding of each thyristor, in the AC of rectification circuit 12, is connected in negative electrode to positive DC side end of rectification circuit 12.From the gate drive signal of control circuit 16 output, be input to the gate terminal of each thyristor 18a and 18b by diode 25aJi 25b branch.That is, correspondingly some being used as in two thyristor 18a and 18b assisted to switching circuit with the polarity of AC power 2.Other structure is identical with the action two-wire system dimmer switch 1A related with the first execution mode.
The related two-wire system dimmer switch 1C two-wire system dimmer switch 1A related with the first execution mode of the 3rd execution mode compares, appended and formed auxiliary thyristor, resistance and the capacitor that opens and closes circuit, therefore structure is slightly complicated, and it becomes the main cause that cost correspondingly rises.Yet, three terminal bidirectional alternating-current switch 11 become non-conduction after, load current is without a diode that forms rectification circuit 12, so loss correspondingly reduces.Therefore in the situation that lighting load 3 is LED bulb, load current value is very little, even what reduce is and a corresponding loss of diode also more to reduce flicker, the fluctuation of LED bulb.
(the 4th execution mode)
The related two-wire system dimmer switch of the 4th execution mode of the present invention is described.Fig. 6 represents the circuit structure of the two-wire system dimmer switch 1D that the 4th execution mode is related.Two-wire system dimmer switch 1D combines the feature of the related two-wire system dimmer switch 1B of the second execution mode and the related two-wire system dimmer switch 1C of the 3rd execution mode, possesses as the photoelectricity three terminal bidirectional alternating-current switch coupler 20 of accurate main switching circuit and two auxiliary circuit (thyristor) 18a of switching and 18b.In the related two-wire system dimmer switch 1D of the 4th execution mode, with the related two-wire system dimmer switch 1C of the 3rd execution mode similarly, when load current flows through thyristor 18a or 18b, without a diode that forms rectification circuit 12, so loss correspondingly reduces.Therefore, the two-wire system dimmer switch 1B related with the second execution mode compares, and from thyristor 18a or the 18b change of current, the variation in voltage during to photoelectricity three terminal bidirectional alternating-current switch 21 diminishes load current, can supply with stable electric power to lighting load 3.In addition, its result, the variation of the lightness of LED bulb further diminishes, and can produce hardly flicker, fluctuation.
(the 5th execution mode)
Above-mentioned first to fourth execution mode all relates to the structure of two-wire system dimmer switch, and the 5th execution mode relates to the control method in above-mentioned any two-wire system dimmer switch 1A～1D.The drive circuit 70 of the LED bulb shown in two-wire system dimmer switch 1A～1D and Figure 10 all has the circuit structure that alternating electromotive force is converted to direct current power and accumulates electric power to buffer condenser.Therefore think, for example at switch 5 for a long time when disconnecting, any buffer condenser is all discharged, electric power is without residue.When turn on-switch 5, two-wire system dimmer switch 1A～1D starts, and control circuit 16 output gate drive signals, start to supply with electric power to lighting load 3 thus.In the situation that lighting load 3 is LED bulb, even if start to supply with electric power, because drive circuit 70 does not start, different action and impedance operator while therefore also presenting from stable lighting.That is, when starting the drive circuit 70 of LED bulb to supply with electric power, at first to buffer condenser 73 chargings.Therefore,, when LED bulb starts, present the dominant impedance operator of capacitive component of this buffer condenser 73.And, if electric current starts to flow to the drive circuit 70 of LED bulb when the voltage ratio of AC power 2 is higher, buffer condenser 73 is charged hastily, produces the large difference of power factor between two-wire system dimmer switch 1A～1D and the drive circuit 70 of LED bulb.
Between the impedance differing widely in power factor, the phase place of the voltage being applied in is respectively different from the phase place of AC power 2, if be for example made as load voltage when the voltage of AC power 2 is 100V, be-30V that the splicing ear 1a of two-wire system dimmer switch 1A～1D and the voltage between 1b (being made as switch room voltage) are 130V.That is, the voltage over zero of AC power 2 is different from the switch room voltage over zero of two-wire system dimmer switch 1A～1D.Two-wire system dimmer switch 1A～1D object is originally to take the voltage over zero of AC power 2 to control as benchmark, and switch room voltage over zero is estimated in the output of above-mentioned control circuit 16 based on frequency detection circuit 17 and carry out brightness adjustment control.Therefore,, if control (output gate drive signal) in the different timing of the voltage over zero from AC power 2, likely cannot carry out stable brightness adjustment control originally.
Fig. 7 represents the waveform of each portion under the related control method of the 5th execution mode.Before starting light modulation, the phase place of the voltage waveform of AC power 2 is consistent with the phase place of the switch room voltage waveform of two-wire system dimmer switch 1A～1D.In the related control method of the 5th execution mode, when the brightness adjustment control of lighting load 3 starts, in the output based on frequency detection circuit 17, infer near the switch room voltage over zero that (for example, with respect to switch room voltage over zero ± number ms in) the initial gate drive signal of the gate terminal input of output from control circuit 16 to the auxiliary thyristor 18 that opens and closes circuit.The timing of exporting initial gate drive signal is unnecessary before voltage over zero, can be through after voltage over zero yet.So, can from the low level of AC power 2, start the charging of buffer condenser 73 of the drive circuit 70 of LED bulb.By supplying with electric power near the beginning of voltage over zero (0V) to the drive circuit 70 of LED bulb like this, the impedance variation of the drive circuit 70 of two-wire system dimmer switch 1A～1D and LED bulb can not become sharply, can be shared by the drive circuit 70 of two-wire system dimmer switch 1A～1D and LED bulb the electric power in 1/2 cycle of AC power 2.In addition, between two-wire system dimmer switch 1A～1D and the drive circuit 70 of LED bulb, can not produce the large difference of power factor, therefore can carry out stable brightness adjustment control.
In addition, in the above description, as main switch element, exemplified with the three terminal bidirectional alternating-current switch as an ovonic switch element, but be not limited thereto, insulated gate bipolar transistor), FET inverse parallel connects the structure etc. of gained so long as the structure that similarly makes electric current two-way circulate with three terminal bidirectional alternating-current switch, such as can be also by IGBT (Insulated Gate Bipolar Transistor:.
description of reference numerals
1A～1D: two-wire system dimmer switch; 2: AC power; 3: lighting load; 4: light modulation amount initialization circuit (variable resistance); 5: switch; 10: main switching circuit; 11: main switch element (three terminal bidirectional alternating-current switch); 12: rectification circuit; 13: power circuit; 16: control circuit; 17: frequency detection circuit; 18,18a, 18b: the auxiliary circuit (auxiliary switch element, thyristor) that opens and closes; 20: accurate main switching circuit (photoelectricity three terminal bidirectional alternating-current switch coupler); 21: photoelectricity three terminal bidirectional alternating-current switch; 22: light-emitting diode.
Claims (6)
1. a two-wire system dimmer switch, is connected in series with AC power and lighting load, and this two-wire system dimmer switch is characterised in that to possess:
Be transfused to the first splicing ear and second splicing ear of alternating electromotive force;
Main switching circuit, it is connected between above-mentioned the first splicing ear and above-mentioned the second splicing ear, take the first thyristor as main switch element;
Rectification circuit, it is connected between above-mentioned the first splicing ear and above-mentioned the second splicing ear;
Power circuit, it is connected in the DC side of above-mentioned rectification circuit, guarantees the internal electric source of above-mentioned two-wire system dimmer switch;
Frequency detection circuit, it is connected in the DC side of above-mentioned rectification circuit, and output is for detection of the detection signal of the regulation of the frequency of above-mentioned AC power;
The auxiliary circuit that opens and closes, it is connected in DC side or the AC of above-mentioned rectification circuit, take the second thyristor as auxiliary switch element, at above-mentioned main switch element carrying load current during conducting not, and output gate drive signal is so that above-mentioned main switch element or other thyristor conducting;
Light modulation amount initialization circuit, it is operated by user, for setting for regulating the light modulation amount of the lightness of above-mentioned lighting load; And
Control circuit, its above-mentioned detection signal based on from the output of said frequencies testing circuit detects the frequency of above-mentioned AC power, estimate the voltage over zero of above-mentioned AC power, what at the light modulation amount based on being set by above-mentioned light modulation amount initialization circuit and the voltage over zero that estimates, determine first regularly starts output for making the driving signal of above-mentioned auxiliary switching circuit turn-on, stops the output of above-mentioned driving signal in the second timing of the Zao stipulated time of voltage over zero estimating than the next one of the above-mentioned voltage over zero estimating.
2. two-wire system dimmer switch according to claim 1, is characterized in that,
Also possesses accurate main switching circuit, the main switching circuit of this standard is according to the above-mentioned gate drive signal from above-mentioned auxiliary switching circuit output and conducting, after above-mentioned auxiliary switching circuit turn-on, at above-mentioned main switch element carrying load current during conducting not, and output is for making the driving signal of above-mentioned main switch element conducting.
3. two-wire system dimmer switch according to claim 1 and 2, is characterized in that,
Above-mentioned main switch element is three terminal bidirectional alternating-current switch,
It is auxiliary switch element that above-mentioned auxiliary switching circuit be take the thyristor of the DC side that is connected in above-mentioned rectification circuit.
4. two-wire system dimmer switch according to claim 1 and 2, is characterized in that,
Above-mentioned main switch element is three terminal bidirectional alternating-current switch,
Above-mentioned auxiliary switching circuit take be connected in above-mentioned rectification circuit AC and with two thyristors that the polarity of above-mentioned AC power is correspondingly alternately switched on be auxiliary switch element.
According to claim 2, be subordinated to the claim 3 of claim 2 or be subordinated to the two-wire system dimmer switch claimed in claim 4 of claim 2, it is characterized in that,
It is switch element that the main switching circuit of above-mentioned standard be take photoelectricity three terminal bidirectional alternating-current switch coupler, photoelectricity three terminal bidirectional alternating-current switch and the above-mentioned main switch element of the primary side of above-mentioned photoelectricity three terminal bidirectional alternating-current switch coupler are connected in parallel, and a side connecting terminals is connected to the gate terminal of above-mentioned main switch element, the light-emitting diode of the primary side of above-mentioned photoelectricity three terminal bidirectional alternating-current switch coupler and above-mentioned auxiliary switching circuit are connected in series
The maintenance current value of above-mentioned photoelectricity three terminal bidirectional alternating-current switch is less than the maintenance current value of above-mentioned three terminal bidirectional alternating-current switch.
6. according to the two-wire system dimmer switch described in any one in claim 1～5, it is characterized in that,
Above-mentioned control circuit is when starting the brightness adjustment control of above-mentioned lighting load, and near the timing output of the regulation above-mentioned voltage over zero estimating is for making the initial driving signal of above-mentioned auxiliary switching circuit turn-on.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2012007529A JP5975375B2 (en) | 2012-01-17 | 2012-01-17 | 2-wire dimmer switch |
| JP2012-007529 | 2012-01-17 | ||
| PCT/JP2012/007762 WO2013108331A1 (en) | 2012-01-17 | 2012-12-04 | Two-line dimmer switch |
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| CN104041188A true CN104041188A (en) | 2014-09-10 |
| CN104041188B CN104041188B (en) | 2016-06-15 |
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| JP (1) | JP5975375B2 (en) |
| KR (1) | KR101626694B1 (en) |
| CN (1) | CN104041188B (en) |
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| CN112533327A (en) * | 2019-09-17 | 2021-03-19 | 松下知识产权经营株式会社 | Load control device |
| CN113966646A (en) * | 2020-05-21 | 2022-01-21 | 理光微电子株式会社 | Lighting system |
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| CN102984873B (en) * | 2012-12-27 | 2018-07-20 | 莱得圣智能科技（上海）有限公司 | One wire system intelligently takes electric electronic dimming system |
| DE112015000754T5 (en) * | 2014-03-11 | 2016-11-10 | Panasonic Intellectual Property Management Co., Ltd. | dimming |
| CN103957636A (en) * | 2014-04-28 | 2014-07-30 | Tcl-罗格朗国际电工（惠州）有限公司 | Two-wire dimming circuit |
| EP3307026B1 (en) * | 2015-06-08 | 2020-11-18 | Panasonic Intellectual Property Management Co., Ltd. | Dimmer |
| JP2016001619A (en) * | 2015-08-24 | 2016-01-07 | パナソニックＩｐマネジメント株式会社 | 2-wire dimmer switch |
| JP6994686B2 (en) * | 2018-08-10 | 2022-01-14 | パナソニックＩｐマネジメント株式会社 | Power converter |
| KR102138942B1 (en) * | 2019-02-12 | 2020-07-28 | 고관수 | Triac module |
| CN111372360B (en) * | 2019-12-30 | 2025-01-03 | 欧普照明股份有限公司 | Phase-cut dimming circuit |
| CN114025448B (en) * | 2021-12-02 | 2023-10-20 | 深圳市源立信照明科技有限公司 | Flat lamp circuit and control method thereof |
| CN217789938U (en) * | 2022-07-12 | 2022-11-11 | 常州市巨泰电子有限公司 | Lamp controller |
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| CN104041188B (en) | 2016-06-15 |
| TW201336350A (en) | 2013-09-01 |
| KR20140102271A (en) | 2014-08-21 |
| JP2013149399A (en) | 2013-08-01 |
| KR101626694B1 (en) | 2016-06-01 |
| WO2013108331A1 (en) | 2013-07-25 |
| TWI504316B (en) | 2015-10-11 |
| TW201545606A (en) | 2015-12-01 |
| TWI581667B (en) | 2017-05-01 |
| JP5975375B2 (en) | 2016-08-23 |
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