CN104837251A - Single-live-wire dimming circuit for wall-controlled LED lamp - Google Patents
Single-live-wire dimming circuit for wall-controlled LED lamp Download PDFInfo
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Abstract
A single-live-wire dimming circuit for a wall-controlled LED lamp is composed of a wall-controlled switch unit and an LED lamp adjustment driving unit; wherein the wall-controlled switch unit comprises a single-live-wire power module, a single-chip microcomputer control module, a phase shift driving module, a zero-passing detecting module and a brightness setting module. The LED lamp adjustment driving unit comprises a single-chip microcomputer adjusting module and an LED driving module. When brightness changes, the wall-controlled switch unit transmits a brightness control signal through controlling a voltage waveform which is output from the single-live-wire output end. The LED lamp adjustment driving unit receives the brightness control signal through the single-chip microcomputer adjusting module and controls the brightness of the LED lamp. According to the LED lamp dimming method, a remote controller is not required, and single laying of a control line is not required. Furthermore re-laying of a power line is not required. Replacement and upgrade of a common illuminating lamp can be realized.
Description
Technical field
The present invention relates to a kind of lighting technology, especially a kind of wall controlled LED lamp list live wire light adjusting circuit.
Background technology
Due to the nonlinear characteristic of LED, the brightness of LED can not adopt the mode of regulation voltage to realize.
When adopting controllable constant-current source to regulate the brightness of LED, the change of operating current can bring the chromatogram of LED to offset, simultaneously, under low-light level, LED load current also becomes very low, the reduction of controllable constant-current source efficiency and temperature rise can be made to increase, the power consumption of loss on driving chip is larger, thus can damage the life-span of constant-current source and LED light source.
Adopt PWM(pulse-width modulation) brightness of dimming mode control LED, problem voltage regulating mode can avoided and adjust current system to bring.LED light-dimming method conventional at present has three kinds:
One is adopt remote controller to control.LED control circuit is equipped with remote control device, can have grade light modulation or stepless dimming by remote controller to LED, and its shortcoming is that a LED needs outfit remote controller, causes remote controller quantity many, and management trouble, cost is also higher.
Two is adopt digital control technology.Such as, adopt the lighting interface of DALI(digital address) technology, DALI systems soft ware can carry out independent addressing to the single or multiple LED lamp on same forceful electric power loop or different circuit, carries out accurate light modulation and switch control rule by DALI systems soft ware to single lamp or arbitrary lamp group.Program advanced technology, but cost is very high, and system, except power line laid by needs, also needs to lay control line.
Three is adopt single live wire switch on and off control technology.Such as, adopt NU102 special chip, the switch motion of common wall surface switch in official hour can be utilized, realize the brightness regulation of LED.But the method can only provide the adjustment brightness of 4 grades of LED, and the free requirement of switch motion.
Summary of the invention
Object of the present invention aims to provide a kind of when not changing the wiring of existing illuminating line, utilizes single live wire to carry out the circuit of light modulation to wall controlled LED lamp.
For achieving the above object, the technical scheme that the present invention takes is: a kind of wall controlled LED lamp list live wire light adjusting circuit, driver element is regulated to form by wall control switch element, LED, described wall control switch element is provided with single live wire input, single fire wire output end, and described single live wire input is connected to AC power live wire; Described LED regulates driver element to be provided with live wire input, zero line input, and wherein, described live wire input is connected to single fire wire output end of wall control switch element, and described zero line input is connected to AC power zero line; Described AC power is single-phase 220V alternating current.
Described wall control switch element is made up of single fire-wire power module, single chip control module, phase shift driver module, zero passage detection module, the given module of brightness.
Described single fire-wire power module has single live wire OFF state current-taking function and ON state current-taking function, for providing working power to wall control switch element.
Described zero passage detection module is halfwave rectifier bleeder circuit, can detect the zero cross signal of described AC power, and be supplied to single chip control module.
The given module of described brightness can provide brightness Setting signal to single chip control module.
Described phase shift driver module is that bidirectional thyristor exchanges phase-shift circuit.
Described single chip control module, according to brightness Setting signal, sends triggering signal control phase shift driver module and regulates driver element to power to LED, and regulate driver element to send brightness control signal to LED.
Described LED regulates driver element to be made up of single-chip microcomputer adjustment module, LED drive module.
Described LED drive module is provided with ac input end and LED drive end, and wherein, ac input end is connected to live wire input and the zero line input that LED regulates driver element, and LED drive end is connected to LED.
Described LED drive module is also provided with PWM brightness regulated signal input.
Described single-chip microcomputer adjustment module includes and regulates single-chip microcomputer, positive half wave rectification shaping circuit, negative halfwave rectifier shaping circuit and regulator rectifier circuit, is provided with ac input end, PWM brightness regulated signal output; Described ac input end is connected to live wire input and the zero line input that LED regulates driver element, and PWM brightness regulated signal output is connected to the PWM brightness regulated signal input of LED drive module; Described positive half wave rectification shaping circuit and negative halfwave rectifier shaping circuit carry out positive half wave rectification shaping and negative halfwave rectifier shaping to the alternating voltage of live wire input input respectively; The output of described positive half wave rectification shaping circuit, the output of negative halfwave rectifier shaping circuit are connected to the pulse capture input regulating single-chip microcomputer different respectively.
Described single fire-wire power module is by single live wire pressurizer MP-6V-02S and peripheral cell diode D1, electric capacity C1, electric capacity C2, inductance L 1, inductance L 2, and low-dropout regulator HT7333 and peripheral cell electric capacity C3, electric capacity C4 form.
The given module of described brightness adopts BCD rotary encoder.
Described phase shift driver module is made up of bidirectional thyristor V1, controllable silicon output optocoupler MOC3023, resistance R1, resistance R2, resistance R3.
Described zero passage detection module is made up of diode D2, resistance R4, resistance R5, voltage-stabiliser tube DW1.
Described single chip control module comprises control single chip computer, crystal oscillator XT1; Described control single chip computer model is MSP430G2553.Described adjustment single-chip microcomputer model is MSP430G2553.
Described wall control switch element sends brightness control signal by the voltage waveform controlling the output of single fire wire output end; Described LED regulates driver element receive brightness control signal by single-chip microcomputer adjustment module and control brightness; Described brightness control signal forms by guiding waveform and data waveform.
Described guiding waveform is by the negative half-wave of a not conducting, and the positive half wave of an immediately complete conducting forms; Guiding waveform also can by the complete cycle of a not conducting, the positive half wave composition of an immediately complete conducting.
In described data waveform, the brightness degree quantity that continuous has the single-phase half-sinusoid of specific phase shifting angle represents; In data waveform, brightness degree also can represent the distinct symbols in carry counting system system with the single-phase half-sinusoid of different phase shifting angle, the single-phase half-sinusoid composition data waveform of a different phase shifting angle continuously, the carry counting system data representation brightness degree corresponding with data waveform.
The invention has the beneficial effects as follows, adopt single live wire mode to control LED brightness, without the need to remote controller, without the need to control line, also again need not lay power line, the alternative upgrading of general lighting lamp can be realized; LED brightness regulation adopts knob assembly to regulate, and meets operating habit; Brightness control signal on single live wire is only send in short-term when changing brightness, can not cause during LED brightness regulation and glimmer; There is single-fire-wire electronic switch to turn off the light function.
Accompanying drawing explanation
Fig. 1 is system architecture diagram.
Fig. 2 is wall control switch element structure chart.
Fig. 3 is wall control switch element embodiment circuit diagram.
Fig. 4 is α angle schematic diagram corresponding to ternary.
Fig. 5 is the waveform example figure sending ternary values 21.
Fig. 6 is the waveform example figure sending ternary values 10.
Fig. 7 is brightness control signal sending control method.
Fig. 8 is that LED regulates structure of driving unit figure.
Fig. 9 is single-chip microcomputer adjustment module embodiment circuit diagram.
Figure 10 is LED drive module embodiment circuit diagram.
Figure 11 is brilliance control control method.
Embodiment
Below by accompanying drawing, also the present invention is described in further detail in conjunction with the embodiments, but embodiments of the present invention are not limited thereto.
Embodiments of the invention structure as shown in Figure 1, regulates driver element to be composed in series by wall control switch element and LED.Wall control switch element list live wire AC enters, and single live wire AC1 goes out.LED regulates driver element live wire AC1 to enter, and zero line N goes out.
The structure of wall control switch element as shown in Figure 2, is made up of single fire-wire power module, single chip control module, phase shift driver module, zero passage detection module, the given module of brightness.Single fire-wire power module has single live wire OFF state current-taking function, also has ON state current-taking function, for providing working power to wall control switch element.
The AC power zero cross signal that zero passage detection module detects is fed to single chip control module, and the given module of brightness provides brightness Setting signal to single chip control module.Single chip control module, according to brightness Setting signal, controls phase shift driver module and regulates driver element to power to LED, and regulate driver element to send brightness control signal to LED.
The embodiment circuit of wall control switch element as shown in Figure 3.
Single fire-wire power module is by single live wire pressurizer U1 and peripheral cell diode D1, electric capacity C1, electric capacity C2, inductance L 1, inductance L 2, and low-dropout regulator U2 and peripheral cell electric capacity C3, electric capacity C4 form.The model of single live wire pressurizer U1 is MP-6V-02S, and the model of low-dropout regulator U2 is HT7333.
Single live wire input AC be wall control switch element in analog, be connected to the alternating voltage common port COM of single live wire pressurizer U1; The two ends of electric capacity C1 are connected to filter capacitor input FIL and the alternating voltage common port COM of single live wire pressurizer U1 respectively; The VD ground GND end of single live wire pressurizer U1 for wall control switch element digitally, the two ends of inductance L 2 be connected to respectively wall control switch element digitally and in analog; Diode D1, inductance L 1 and electric capacity C2 form halfwave rectifier filter circuit, and the input of halfwave rectifier filter circuit is connected to single fire wire output end AC1, exports the high direct voltage input HDC being connected to single live wire pressurizer U1.Single live wire pressurizer U1 is also provided with DC voltage output end VCC, alternating current pressure side AC.
The input VIN of low-dropout regulator U2 is connected to the DC voltage output end VCC of single live wire pressurizer U1, and output VOUT exports the DC supply VDD of+3.3V; The ground end GND of single live wire pressurizer U1 is connected to wall control switch element digitally; Electric capacity C3, electric capacity C4 are respectively input voltage, the output voltage filter capacitor of low-dropout regulator U2.
Phase shift driver module is that bidirectional thyristor exchanges phase-shift circuit, and be made up of bidirectional thyristor V1, controllable silicon output optocoupler U3, resistance R1, resistance R2, resistance R3, the model that controllable silicon exports optocoupler U3 is MOC3023.Two anode taps of bidirectional thyristor V1 are connected to the alternating current pressure side AC of single fire wire output end AC1 and single live wire pressurizer U1 respectively; Resistance R1 is connected in parallel on two anode taps of bidirectional thyristor V1; The output controllable silicon that controllable silicon exports optocoupler U3 is connected with resistance R2, and its series arm is connected to the first anode of bidirectional thyristor V1 and controls pole; The input light-emitting diode that controllable silicon exports optocoupler U3 is connected with resistance R3, and its series arm one end is connected to DC supply VDD, and one end is triggering signal input in addition.
Zero passage detection module is halfwave rectifier bleeder circuit, is made up of diode D2, resistance R4, resistance R5, voltage-stabiliser tube DW1.The two ends of resistance R4 are connected to diode D2 negative electrode and voltage-stabiliser tube DW1 negative electrode respectively; Diode D2 anode is connected to single fire wire output end AC1; Voltage-stabiliser tube DW1 anode is connected to wall control switch element in analog; Resistance R5 is connected in parallel on voltage-stabiliser tube DW1 two ends.Zero cross signal exports from voltage-stabiliser tube DW1 negative electrode.
The given module of brightness is BCD rotary encoder SW1, exports BCD coding 0000-1001, and wherein, BCD coding 0001-1001 represents brightness 1-9, and when BCD is encoded to 0000, LED is extinguished in representative.
The given module of brightness also can adopt potentiometer to carry out dividing potential drop to DC supply VDD, and output area is at the given voltage of the brightness of 0-3.3V.The given average voltage of brightness of the 0-3.3V exported by potentiometer is divided into 10 intervals, and minimum voltage is interval corresponding with the coding 0000 of BCD rotary encoder SW1, and ceiling voltage is interval corresponding with the coding 1001 of BCD rotary encoder SW1.
Single chip control module comprises control single chip computer U4, crystal oscillator XT1.The model of control single chip computer U4 is MSP430G2553.Zero cross signal inputs from the P2.0 of control single chip computer U4, and triggering signal exports from the P1.1 of control single chip computer U4, and the BCD coding of the given module of brightness inputs from P2.4-P2. 1.If the given module of brightness adopts potentiometer, then the output voltage of potentiometer is connected to control single chip computer U4 analog voltage input A0(P1.0).The BCD coding that control single chip computer U4 inputs by reading P2.4-P2. 1, or A/D conversion is carried out to the given voltage of brightness that analog voltage input A0 inputs, obtain brightness Setting signal 0-9.
Wall control switch element sends brightness control signal by the voltage waveform controlling single fire wire output end AC1 output, when the maintenance of wall control switch element does not send brightness control signal state, single chip control module continues output low level triggering signal, bidirectional thyristor V1 constant conduction except zero crossing, the voltage waveform that single fire wire output end AC1 exports is continuous whole single-phase sine wave.
When wall control switch element needs a transmission brightness control signal, the waveform of a brightness control signal forms by guiding waveform and data waveform immediately; Guide waveform by the negative half-wave of a not conducting, the positive half wave composition of an immediately complete conducting; Guiding waveform also can by the complete cycle of a not conducting, the positive half wave composition of an immediately complete conducting.
In data waveform, the brightness degree quantity that continuous has the single-phase half-sinusoid of specific phase shifting angle represents; In data waveform, brightness degree also can represent the distinct symbols in carry counting system system with the single-phase half-sinusoid of different phase shifting angle, the single-phase half-sinusoid composition data waveform of a different phase shifting angle continuously, the carry counting system data representation brightness degree corresponding with data waveform.
In embodiments of the present invention, data waveform is made up of the phase shift waveform of a cycle, and negative half-wave is phase shifting angle β
1, positive half wave is phase shifting angle β
0; Phase shifting angle β
1, phase shifting angle β
0value can be respectively phase shifting angle α
2, α
1, α
0in one, phase shifting angle α
2, α
1, α
0corresponding trit code value 2,1,0 respectively.
Brightness control signal has 9 grades of different brightness from low to high, is made up of 2 ternary brightness datas; 2 ternary brightness datas corresponding to 9 grades of different brightness are from low to high 00,01,10,11,02,20,12,21,22; Phase shifting angle β
1be a high position for 2 ternary brightness datas, phase shifting angle β
0it is the low level of 2 ternary brightness datas.
Phase shifting angle α
2, α
1, α
0meet α
2< α
1< α
0relation, α got by representative value
2=45 °, α
1=90 °, α
0=135 °.As shown in Figure 4.
As shown in Figure 5 be the waveform example figure sending ternary brightness data 21, wherein, the brightness control signal voltage waveform that Fig. 5 (a) exports for single fire wire output end AC1, Fig. 5 (b) is zero cross signal voltage waveform, Fig. 5 (c) bears voltage waveform after halfwave rectifier shaping for brightness control signal, and Fig. 5 (d) is voltage waveform after brightness control signal positive half wave rectification shaping.
When single fire wire output end AC1 exports continuous whole single-phase sine wave, the voltage difference between single fire wire output end AC1 and single live wire input AC is very little, and zero passage detection module can not export zero cross signal, and zero cross signal is maintained low level state.
When single chip control module needs a transmission brightness control signal, the random triggering signal that stops exports.Time during stopping being engraved in AC power positive half wave when exporting triggering signal, this positive half wave bidirectional thyristor V1 conducting, ensuing negative half-wave bidirectional thyristor V1 not conducting, zero passage detection module exports zero cross signal at whole negative half-wave, zero cross signal is positive pulse, as shown in the pulse 1 in Fig. 5, pulse 1 width is close to 10ms.Single chip control module sends at the falling edge of pulse 1 trigger impulse that is no more than 10ms, controls the ensuing positive half wave conducting of bidirectional thyristor V1; Simultaneously using the trailing edge of pulse 1 as zero passage time zero, be phase shifting angle β after 10ms
1zero crossing, be phase shifting angle β after 20 ms
0zero crossing.In Fig. 5, negative half-wave phase shifting angle β
1value be α
2, after corresponding negative halfwave rectifier shaping, voltage waveform is pulse 2; Positive half wave phase shifting angle β
0value be α
1, after corresponding positive half wave rectification shaping, voltage waveform is pulse 3; 2 ternary brightness datas that brightness control signal is corresponding are 21.
When single chip control module needs transmission brightness control signal, when random stopping triggering signal being engraved in during AC power bears half-wave when exporting, this negative half-wave bidirectional thyristor V1 conducting, ensuing positive half wave bidirectional thyristor V1 not conducting, but due to the employing of zero passage detection module is halfwave rectifier, positive half wave bidirectional thyristor V1 not conducting, also can not make zero passage detection module export zero cross signal; Until ensuing negative half-wave bidirectional thyristor V1 not conducting again, zero passage detection module exports zero cross signal at whole negative half-wave, and zero cross signal is positive pulse.Example as shown in Figure 6, the brightness control signal voltage waveform that Fig. 6 (a) exports for single fire wire output end AC1, Fig. 6 (b) is zero cross signal voltage waveform, Fig. 6 (c) bears voltage waveform after halfwave rectifier shaping for brightness control signal, and Fig. 6 (d) is voltage waveform after brightness control signal positive half wave rectification shaping.Pulse 4 in Fig. 6 is zero cross signal positive pulse, and its width is close to 10ms.Single chip control module sends at the falling edge of pulse 4 trigger impulse that is no more than 10 ms, controls the ensuing positive half wave conducting of bidirectional thyristor V1; Simultaneously using the trailing edge of pulse 4 as zero passage time zero, be phase shifting angle β after 10ms
1zero crossing, be phase shifting angle β after 20 ms
0zero crossing.In Fig. 6, negative half-wave phase shifting angle β
1value be α
1, after corresponding negative halfwave rectifier shaping, voltage waveform is pulse 5; Positive half wave phase shifting angle β
0value be α
0, after corresponding positive half wave rectification shaping, voltage waveform is pulse 6; 2 ternary values that brightness control signal is corresponding are 10.
2 ternary brightness data corresponding brightness Setting signal 1-9, brightness order is from low to high followed successively by 00,01,10,11,02,20,12,21,22.Adopt the reason of this order to be that brightness increases, the effective value of brightness control signal voltage increases, and guarantees to send the present intensity that brightness control signal does not affect LED.
When brightness Setting signal is 0, single chip control module stops exporting triggering signal, and bidirectional thyristor V1 turns off, and LED is extinguished, and single fire wire output end AC1 flows through micro-electric current.
Fig. 7 is brightness control signal sending control method, and realized by the program in single chip control module, its method is:
Steps A, judges whether to close LED, is close LED, forwards step C to; Otherwise forward step B to;
Step B, sends a brightness control signal;
Step C, judge whether brightness Setting signal changes, brightness Setting signal changes, and returns steps A; Brightness Setting signal does not change, and returns step C.
When wall control switch element does not send brightness control signal, when LED is in illuminating state, the voltage waveform that single fire wire output end AC1 exports is continuous whole single-phase sine wave.
LED regulates structure of driving unit as shown in Figure 8, and be made up of single-chip microcomputer adjustment module, LED drive module, the ac input end of single-chip microcomputer adjustment module and LED drive module is all connected to live wire input AC1, zero line input N.
LED drive module is used for driving LED lamp and lights, and the LED drive module of all PWM of being provided with brightness regulated signal inputs is all applicable to the present invention.
Single-chip microcomputer adjustment module is provided with PWM brightness regulated signal output and is connected to the PWM brightness regulated signal input of LED drive module.
The embodiment circuit of single-chip microcomputer adjustment module as shown in Figure 9.
In embodiment illustrated in fig. 9, single-chip microcomputer adjustment module forms by regulating single-chip microcomputer U5, diode D3, diode D4, diode D5, diode D6, diode D7, diode D8, voltage-stabiliser tube DW2, voltage-stabiliser tube DW3, voltage-stabiliser tube DW4, resistance R6, resistance R7, resistance R8, electric capacity C5, crystal oscillator XT2.
Diode D3, diode D4 negative electrode, diode D5, diode D6, electric capacity C5, resistance R6, voltage-stabiliser tube DW2 form regulator rectifier circuit, provide power supply to adjustment single-chip microcomputer U5.
The negative halfwave rectifier shaping circuit of diode D8, resistance R8, voltage-stabiliser tube DW4 composition, negative half waveform that voltage-stabiliser tube DW4 obtains is as shown in Fig. 5 (c), Fig. 6 (c); Diode D7, resistance R7, voltage-stabiliser tube DW3 form positive half wave rectification shaping circuit, and the positive half wave waveform that voltage-stabiliser tube DW3 obtains is as shown in Fig. 5 (d), Fig. 6 (d).Positive half wave rectification shaping circuit and negative halfwave rectifier shaping circuit carry out positive half wave rectification shaping and negative halfwave rectifier shaping to the alternating voltage that live wire input AC1 inputs respectively.The output of positive half wave rectification shaping circuit, the output of negative halfwave rectifier shaping circuit are connected to respectively and regulate the seizure of single-chip microcomputer U5 to compare input P2.0, compare input P2.1.
Regulate single-chip microcomputer U5 model to be MSP430G2553, its PWM output P1.2 is described PWM brightness regulated signal output.The power-input VSS of single-chip microcomputer U5 is regulated to be connected to common reference ground.
LED drive module is used for driving LED lamp and lights, and the LED drive module being provided with PWM brightness regulated signal input can be applicable to the present invention, is only one of them embodiment circuit shown in Figure 10.
In Figure 10, LED drive module is made up of LED driver U6, diode D9, diode D10, diode D11, diode D12, electric capacity C6, electric capacity C7, electric capacity C8, inductance L 3, fast recovery diode D13, switching tube VD, resistance R9, resistance R10.The model of LED driver U6 is HV9910.
In Figure 10, diode D9, diode D10, diode D11, diode D12 form single phase bridge type rectifier circu.2 ac input ends of single phase bridge type rectifier circu are connected to live wire input AC1, zero line input N respectively, direct current exports negative terminal and is connected to common reference ground, and direct current output plus terminal is connected to electric capacity C6 positive pole, one end of electric capacity C7, the power input VIN of LED driver U6, one end of inductance L 3, fast recovery diode D13 negative electrode.The ground input GND of LED driver U6 is connected to common reference ground.The other end of electric capacity C6 negative pole, electric capacity C7 is connected to common reference ground.As the negative polarity link LED-of high-powered LED lamp after the drain electrode of fast recovery diode D13 anode and switching tube VD connects, other one end of inductance L 3 is as the positive polarity link LED+ of high-powered LED lamp.The LED current test side CS of described LED driver U6 is connected to after the source electrode of switching tube VD and resistance R9 mono-client link; The other end of resistance R9 is connected to common reference ground.The grid of switching tube VD is connected to the drive end GATE of LED driver U6; One end of resistance R10 is connected to the frequency of oscillation control end RT of LED driver U6, the other end is connected to common reference ground.Electric capacity C8 positive pole is connected to the control voltage output VDD of LED driver U6 and linear current control end LD, negative pole are connected to common reference ground.The enable control end PWM_D of LED driver U6 is described PWM brightness regulated signal input.
LED regulates driver element receive brightness control signal by single-chip microcomputer adjustment module and control brightness, and as shown in figure 11, its method is,
Step one, initialization, control LED is original intensity;
Step 2, judges whether single live wire has brightness control signal; There is no brightness control signal, return step 2; There is brightness control signal, forward step 3 to;
Step 3, receives brightness control signal, obtains ternary brightness data;
Step 4, changes LED brightness, returns step 2.
Original intensity can be set to any one in 9 grades of different brightness, such as, is set to brightness 1.
Judge whether single live wire has brightness control signal, method is the guiding waveform judging whether single live wire has brightness control signal.Under normal circumstances, the voltage waveform that live wire input AC1 inputs is continuous whole single-phase sine wave, and the waveform that negative halfwave rectifier shaping circuit exports is the square wave of cycle 20ms, nearly 10 ms of pulse duration.When wall control switch element sends a brightness control signal, it guides waveform to cause the disappearance of a negative half-wave, as Fig. 5 (c) and the negative half-wave pulse of Fig. 5 (b) pulse 1 correspondence position lack, as Fig. 6 (c) and the negative half-wave pulse of Fig. 6 (b) pulse 7 correspondence position lack.Single-chip microcomputer adjustment module judges that the waveform that negative halfwave rectifier shaping circuit exports has negative half-wave pulse to lack, and the positive half wave waveform that ensuing positive half wave rectification shaping circuit exports is complete, corresponding positive half wave pulse is the pulse 2 in Fig. 5, or the pulse 8 in Fig. 6, can judge the guiding waveform single live wire having brightness control signal.
Receive brightness control signal, obtain ternary brightness data, method is that measurement data waveform bears the angle of flow of half-wave and the angle of flow of positive half wave successively, calculates negative half-wave phase shifting angle β
1with positive half wave phase shifting angle β
0after, then convert ternary brightness data to.In the width of pulse 2 in Fig. 5, Fig. 6, the width of pulse 5 is the angle of flow that data waveform bears half-wave, and in the width of pulse 3 in Fig. 5, Fig. 6, the width of pulse 6 is the angle of flow of data waveform positive half wave.Phase shifting angle and angle of flow sum are 180 °, or are time 10ms.Negative half-wave phase shifting angle β
1, positive half wave phase shifting angle β
0select and phase shifting angle α respectively
2, α
1, α
0in immediate one, determine corresponding trit code value 2,1,0 respectively.
Changing LED brightness, realizing by changing the duty ratio being connected to the PWM brightness regulated signal of the enable control end PWM_D of LED driver U6.
In FIG, wall control switch element is that single live wire AC enters, and single live wire AC1 goes out; LED regulates driver element live wire AC1 to enter, and zero line N goes out.Consider from jamproof angle, the live wire AC in Fig. 1 and zero line N position are exchanged, the method for the invention is still effective, and antijamming capability is stronger.
The method of the invention has following features:
1. adopt single live wire mode to control LED brightness, without the need to remote controller, without the need to control line, also again need not lay power line;
2. LED brightness regulation is divided into 9 grades, adopts knob assembly to regulate, meets operating habit;
3. the brightness control signal on single live wire is only send in short-term when changing brightness;
4. there is function of turning off the light.
Claims (10)
1. a wall controlled LED lamp list live wire light adjusting circuit, regulate driver element to form by wall control switch element, LED, described wall control switch element is provided with single live wire input, single fire wire output end, and described single live wire input is connected to AC power live wire; Described LED regulates driver element to be provided with live wire input, zero line input, and wherein, described live wire input is connected to single fire wire output end of wall control switch element, and described zero line input is connected to AC power zero line; Described AC power is single-phase 220V alternating current; It is characterized in that:
Described wall control switch element is made up of single fire-wire power module, single chip control module, phase shift driver module, zero passage detection module, the given module of brightness;
Described single fire-wire power module has single live wire OFF state current-taking function and ON state current-taking function, for providing working power to wall control switch element;
Described zero passage detection module is halfwave rectifier bleeder circuit, can detect the zero cross signal of described AC power, and be supplied to single chip control module;
The given module of described brightness can provide brightness Setting signal to single chip control module;
Described phase shift driver module is that bidirectional thyristor exchanges phase-shift circuit;
Described single chip control module, according to brightness Setting signal, sends triggering signal control phase shift driver module and regulates driver element to power to LED, and regulate driver element to send brightness control signal to LED;
Described LED regulates driver element to be made up of single-chip microcomputer adjustment module, LED drive module;
Described LED drive module is provided with ac input end and LED drive end, and wherein, ac input end is connected to live wire input and the zero line input that LED regulates driver element, and LED drive end is connected to LED;
Described LED drive module is also provided with PWM brightness regulated signal input;
Described single-chip microcomputer adjustment module includes and regulates single-chip microcomputer, positive half wave rectification shaping circuit, negative halfwave rectifier shaping circuit and regulator rectifier circuit, is provided with ac input end, PWM brightness regulated signal output; Described ac input end is connected to live wire input and the zero line input that LED regulates driver element, and PWM brightness regulated signal output is connected to the PWM brightness regulated signal input of LED drive module; Described positive half wave rectification shaping circuit and negative halfwave rectifier shaping circuit carry out positive half wave rectification shaping and negative halfwave rectifier shaping to the alternating voltage of live wire input input respectively; The output of described positive half wave rectification shaping circuit, the output of negative halfwave rectifier shaping circuit are connected to the pulse capture input regulating single-chip microcomputer different respectively;
Described wall control switch element sends brightness control signal by the voltage waveform controlling the output of single fire wire output end; Described LED regulates driver element receive brightness control signal by single-chip microcomputer adjustment module and control brightness.
2. wall controlled LED lamp list live wire light adjusting circuit according to claim 1, it is characterized in that: described single fire-wire power module is by single live wire pressurizer MP-6V-02S and peripheral cell diode D1, electric capacity C1, electric capacity C2, inductance L 1, inductance L 2, and low-dropout regulator HT7333 and peripheral cell electric capacity C3, electric capacity C4 form.
3. wall controlled LED lamp list live wire light adjusting circuit according to claim 1, is characterized in that: the given module of described brightness adopts BCD rotary encoder.
4. wall controlled LED lamp list live wire light adjusting circuit according to claim 1, is characterized in that: described phase shift driver module is made up of bidirectional thyristor V1, controllable silicon output optocoupler MOC3023, resistance R1, resistance R2, resistance R3.
5. wall controlled LED lamp list live wire light adjusting circuit according to claim 1, is characterized in that: described zero passage detection module is made up of diode D2, resistance R4, resistance R5, voltage-stabiliser tube DW1.
6. wall controlled LED lamp list live wire light adjusting circuit according to claim 1, is characterized in that: described single chip control module comprises control single chip computer, crystal oscillator XT1; Described control single chip computer model is MSP430G2553.
7. wall controlled LED lamp list live wire light adjusting circuit according to claim 1, is characterized in that: described adjustment single-chip microcomputer model is MSP430G2553.
8. wall controlled LED lamp list live wire light adjusting circuit according to claim 1, is characterized in that: described brightness control signal forms by guiding waveform and data waveform.
9. wall controlled LED lamp list live wire light adjusting circuit according to claim 8, is characterized in that: described guiding waveform is by the negative half-wave of a not conducting, and the positive half wave of an immediately complete conducting forms; Guiding waveform also can by the complete cycle of a not conducting, the positive half wave composition of an immediately complete conducting.
10. wall controlled LED lamp list live wire light adjusting circuit according to claim 8, is characterized in that: in described data waveform, and the brightness degree quantity that continuous has the single-phase half-sinusoid of specific phase shifting angle represents; In data waveform, brightness degree also can represent the distinct symbols in carry counting system system with the single-phase half-sinusoid of different phase shifting angle, the single-phase half-sinusoid composition data waveform of a different phase shifting angle continuously, the carry counting system data representation brightness degree corresponding with data waveform.
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| CN111511063A (en) * | 2020-06-19 | 2020-08-07 | 夏欣怡 | L ED illumination governing system |
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| CN104837251B (en) | 2017-09-29 |
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