CN204761794U - Remote LED lamp dimmer circuit of controllable rectification - Google Patents
Remote LED lamp dimmer circuit of controllable rectification Download PDFInfo
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- CN204761794U CN204761794U CN201520475515.7U CN201520475515U CN204761794U CN 204761794 U CN204761794 U CN 204761794U CN 201520475515 U CN201520475515 U CN 201520475515U CN 204761794 U CN204761794 U CN 204761794U
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Abstract
The utility model provides a remote LED lamp dimmer circuit of controllable rectification comprises rectification the control unit, LED lamp adjustting of the lighteness unit. Rectification the control unit comprises control power module, controllable rectifier module, zero -cross detection module, single -chip computer control module, trigger control module, the preset module of luminance, inputs single -phase 220V alternating current power supply, and output contains the controllable rectified voltage of brilliance control signal, LED lamp adjustting of the lighteness unit comprises regulation power module, wave form sampling module, singlechip adjusting module, LED drive module, and the input contains the luminance of the controllable rectified voltage of brilliance control signal, control LED lamp. Dimmer circuit need not the remote controller, need not to lay alone the control line, directly utilizes single phase power line transmission brilliance control signal, can realize that the control of remote LED lamp luminance is adjusted.
Description
Technical field
The utility model relates to a kind of lighting technology, especially a kind of controlled rectification remote LED lamp 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
The purpose of this utility model aims to provide a kind of when not increasing control signal wire and not using a teleswitch, and utilizes single phase poaer supply line to carry out the circuit of light modulation to LED.
For achieving the above object, the technical scheme that the utility model is taked is:
A kind of controlled rectification remote LED lamp light adjusting circuit, is made up of Commutation control unit and LED brightness adjusting unit.
Described Commutation control unit is provided with phase line input terminal, zero line input terminal, the first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal; Described phase line input terminal, zero line input terminal input single-phase 220V AC power; Described first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal export controlled rectification voltage.
Described LED brightness adjusting unit is provided with the first controlled rectification input terminal, the second controlled rectification input terminal, and described first controlled rectification input terminal, the second controlled rectification input terminal are connected to the first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal of Commutation control unit respectively.
Described Commutation control unit by controlling power module, controllable rectifier module, zero passage detection module, single chip control module, trigger control module, the given module of brightness form.
Described control power module input single-phase 220V AC power, export the first DC supply, be made up of control power supply single-phase rectification bridge and the first filter regulator circuit; The rectification negative polarity end of described control power supply single-phase rectification bridge is publicly.
Described controllable rectifier module is made up of rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2, bidirectional thyristor V3, bidirectional thyristor V4; 2 ac input ends of described rectifier bridge UR1 are connected to phase line input terminal and zero line input terminal respectively, and rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, and rectification exports the second plate that negative terminal is connected to bidirectional thyristor V4; The first controlled rectification lead-out terminal is connected to after the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3; The second plate of bidirectional thyristor V1 is connected to phase line input terminal; The second controlled rectification lead-out terminal is connected to after the first anode of bidirectional thyristor V2 is in parallel with the first anode of bidirectional thyristor V4; The second plate of bidirectional thyristor V2 is connected to zero line input terminal.
Described trigger control module is made up of zero cross fired optocoupler U1, zero cross fired optocoupler U2, zero cross fired optocoupler U3, zero cross fired optocoupler U4, input current-limiting resistance R1, input current-limiting resistance R2, input current-limiting resistance R3, input current-limiting resistance R4, output current limiting resistance R5, output current limiting resistance R6, output current limiting resistance R7, output current limiting resistance R8, is provided with and exchanges control input end, rectify control input.
The inside of described zero cross fired optocoupler U1, zero cross fired optocoupler U2, zero cross fired optocoupler U3, zero cross fired optocoupler U4 includes input light-emitting diode, exports optical controlled bidirectional thyrister.
Be connected in parallel to the first DC supply again and exchange control input end after described input current-limiting resistance R1 connects with the input light-emitting diode of zero cross fired optocoupler U1; Be connected in parallel to the first DC supply again and exchange control input end after input current-limiting resistance R2 connects with the input light-emitting diode of zero cross fired optocoupler U2; The first DC supply and rectify control input is connected in parallel to again after input current-limiting resistance R3 connects with the input light-emitting diode of zero cross fired optocoupler U3; The first DC supply and rectify control input KZ is connected in parallel to again after input current-limiting resistance R4 connects with the input light-emitting diode of zero cross fired optocoupler U4.
Output current limiting resistance R5 exports with zero cross fired optocoupler U1 inside the control pole and the first anode that are connected in parallel to bidirectional thyristor V1 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R6 exports with zero cross fired optocoupler U2 inside the control pole and the first anode that are connected in parallel to bidirectional thyristor V2 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R7 exports with zero cross fired optocoupler U3 inside the control pole and the first anode that are connected in parallel to bidirectional thyristor V3 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R8 exports with zero cross fired optocoupler U4 inside the control pole and the first anode that are connected in parallel to bidirectional thyristor V4 after optical controlled bidirectional thyrister is connected again.
Described zero passage detection module is made up of diode D1, resistance R9, voltage-stabiliser tube DW1, is provided with zero passage voltage input, zero-crossing pulse output; The two ends of resistance R9 are connected to diode D1 negative electrode and voltage-stabiliser tube DW1 negative electrode respectively; Diode D1 anode is zero passage voltage input, is connected to phase line input terminal; Voltage-stabiliser tube DW1 anode is connected to publicly; Voltage-stabiliser tube DW1 negative electrode is zero-crossing pulse output.
The given module of described brightness is provided with brightness Setting signal output.
The given module of described brightness is BCD rotary encoder, and described brightness Setting signal is BCD coding.
Described single chip control module includes brightness Setting signal input, signal acquisition input and two-way level signal output; Described brightness Setting signal input is connected to the brightness Setting signal output of the given module of brightness; Described signal acquisition input is connected to the zero-crossing pulse output of zero passage detection module; Described two-way level signal output is respectively and exchanges control output end, rectify control output; Described interchange control output end, rectify control output are connected to interchange control input end, the rectify control input of trigger control module respectively.
Described LED brightness adjusting unit forms by regulating power module, waveform sampling module, single-chip microcomputer adjustment module, LED drive module.
Described adjustment power module inputs controlled rectification voltage, exports the second DC supply, is made up of adjustment power supply single-phase rectification bridge and the second filter regulator circuit; The rectification negative polarity end of described adjustment power supply single-phase rectification bridge is with reference to ground.
Described waveform sampling module is provided with sampling Waveform Input end and sampling pulse output, is made up of diode D2, resistance R12, voltage-stabiliser tube DW2; The two ends of resistance R12 are connected to diode D2 negative electrode and voltage-stabiliser tube DW2 negative electrode respectively; Diode D2 anode is sampling Waveform Input end, is connected to the first controlled rectification input terminal; Voltage-stabiliser tube DW2 anode is connected to reference to ground; Voltage-stabiliser tube DW2 negative electrode is sampling pulse output.
Described single-chip microcomputer adjustment module has seizure input and pwm pulse output, catches the sampling pulse output that input is connected to waveform sampling module.
Described LED drive module is used for driving LED lamp and lights, and is provided with PWM brightness regulated signal input; Described PWM brightness regulated signal input is connected to the pwm pulse output of single-chip microcomputer adjustment module; The input direct voltage upper limit of described LED drive module is greater than 300V.
Described control power module is made up of diode D01, diode D02, diode D03, diode D04, electric capacity C1, resistance R01, voltage-stabiliser tube DW01; Diode D01, diode D02, diode D03, diode D04 composition control power supply single-phase rectification bridge; Electric capacity C1 is connected in parallel on the commutating voltage output controlling power supply single-phase rectification bridge; Resistance R01, voltage-stabiliser tube DW01 form voltage stabilizing circuit; Described first DC supply exports from voltage-stabiliser tube DW01 negative electrode.
Described adjustment power module is made up of diode D05, diode D06, diode D07, diode D08, electric capacity C2, resistance R02, voltage-stabiliser tube DW02; Diode D05, diode D06, diode D07, diode D08 composition regulates power supply single-phase rectification bridge; Electric capacity C2 is connected in parallel on the commutating voltage output regulating power supply single-phase rectification bridge; Resistance R02, voltage-stabiliser tube DW02 form voltage stabilizing circuit; Described second DC supply exports from voltage-stabiliser tube DW02 negative electrode.
Described single chip control module is made up of single-chip microprocessor MCU 1, crystal oscillator XT1; The model of described single-chip microprocessor MCU 1 is MSP430G2553.
Described single-chip microcomputer adjustment module is made up of single-chip microprocessor MCU 2, crystal oscillator XT2; The model of described single-chip microprocessor MCU 2 is MSP430G2553.
Described LED drive module is made up of LED driver U5, diode D11, diode D12, diode D13, diode D14, electric capacity C3, electric capacity C4, inductance L G, fast recovery diode D15, switching tube VD, resistance R14, resistance R15; The model of described LED driver U5 is HV9910.
The beneficial effects of the utility model are, directly adopt the brightness of single phase poaer supply line far distance controlled LED, without the need to remote controller, without the need to control line; LED brightness regulation can divide multiple gear, has function of turning off the light; Rectified wave is adopted to transmit brightness control signal, the reduction of flicker and power factor when can not cause LED brightness regulation.
Accompanying drawing explanation
Fig. 1 is system architecture diagram.
Fig. 2 is Commutation control unit structure chart.
Fig. 3 is controllable rectifier module embodiment circuit diagram.
Fig. 4 is trigger control module embodiment circuit diagram.
Fig. 5 is control section embodiment circuit diagram in Commutation control unit.
Fig. 6 sends brightness degree waveform schematic diagram when being the brightness control signal of brightness 3.
Fig. 7 is brightness control signal sending method.
Fig. 8 is LED brightness adjusting unit structure chart.
Fig. 9 is LED brightness adjusting unit adjustment portion embodiment circuit diagram.
Figure 10 is LED drive module embodiment circuit diagram.
Figure 11 is brightness reception and control method.
Embodiment
Also the utility model is described in further detail below by accompanying drawing, but execution mode of the present utility model is not limited thereto in conjunction with the embodiments.
Realize system architecture diagram of the present utility model as shown in Figure 1, be made up of Commutation control unit and LED brightness adjusting unit.Commutation control unit, by phase line input terminal L, zero line input terminal N input single-phase 220V AC power, exports controlled rectification voltage by the first controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2.LED brightness adjusting unit is inputted controlled rectification voltage by the first controlled rectification input terminal AC1, the second controlled rectification input terminal AC2 and is controlled LED brightness.
The structure of Commutation control unit as shown in Figure 2, is made up of control power module, controllable rectifier module, zero passage detection module, single chip control module, trigger control module, the given module of brightness.
The embodiment of controllable rectifier module as shown in Figure 3, is made up of rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2, bidirectional thyristor V3, bidirectional thyristor V4.2 ac input ends of rectifier bridge UR1 are connected to phase line input terminal L and zero line input terminal N respectively, and rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, and rectification exports the second plate that negative terminal is connected to bidirectional thyristor V4; The first controlled rectification lead-out terminal AC1 is connected to after the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3; The second plate of bidirectional thyristor V1 is connected to phase line input terminal L; The second controlled rectification lead-out terminal AC2 is connected to after the first anode of bidirectional thyristor V2 is in parallel with the first anode of bidirectional thyristor V4; The second plate of bidirectional thyristor V2 is connected to zero line input terminal N.
The trigger impulse of bidirectional thyristor V1 controls pole K11 and first anode K12 from it and inputs, the trigger impulse of bidirectional thyristor V2 controls pole K21 and first anode K22 from it and inputs, the trigger impulse of bidirectional thyristor V3 controls pole K31 and first anode K32 from it and inputs, and the trigger impulse of bidirectional thyristor V4 controls pole K41 and first anode K42 from it and inputs.
Rectifier bridge UR1 adopts single-phase rectification bridge stack, or adopts 4 diode composition single-phase rectification bridges to replace.
The embodiment of trigger control module as shown in Figure 4, is made up of zero cross fired optocoupler U1-U4 and input current-limiting resistance R1-R4, output current limiting resistance R5-R8, is provided with and exchanges control input end KJ, rectify control input KZ.The inside of zero cross fired optocoupler U1-U4 includes input light-emitting diode, exports optical controlled bidirectional thyrister, and zero-cross triggering circuit.The model of zero cross fired optocoupler U1-U4 is selected in MOC3041, MOC3042, MOC3043, MOC3061, MOC3062, MOC3063.
Input current-limiting resistance R1 connects with the input light-emitting diode of zero cross fired optocoupler U1, and series circuit is connected in parallel to the first DC supply VDD1 again and exchanges control input end KJ.Input current-limiting resistance R1 is connected on the input light-emitting diodes tube anode of zero cross fired optocoupler U1, as shown in Figure 4; Input current-limiting resistance R1 also can be connected on the negative electrode of the input light-emitting diode of zero cross fired optocoupler U1.
Input current-limiting resistance R2 connects with the input light-emitting diode of zero cross fired optocoupler U2, and series circuit is connected in parallel to the first DC supply VDD1 again and exchanges control input end KJ.Input current-limiting resistance R3 connects with the input light-emitting diode of zero cross fired optocoupler U3, and series circuit is connected in parallel to the first DC supply VDD1 and rectify control input KZ again.Input current-limiting resistance R4 connects with the input light-emitting diode of zero cross fired optocoupler U4, and series circuit is connected in parallel to the first DC supply VDD1 and rectify control input KZ again.Input current-limiting resistance R2-R4 can be connected on the input light-emitting diodes tube anode of corresponding zero cross fired optocoupler, as shown in Figure 4; Also the input light-emitting diodes tube cathode of corresponding zero cross fired optocoupler can be connected on.
Output current limiting resistance R5 exports with zero cross fired optocoupler U1 inside the control pole K11 and the first anode K12 that are connected in parallel to bidirectional thyristor V1 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R6 exports with zero cross fired optocoupler U2 inside the control pole K21 and the first anode K22 that are connected in parallel to bidirectional thyristor V2 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R7 exports with zero cross fired optocoupler U3 inside the control pole K31 and the first anode K32 that are connected in parallel to bidirectional thyristor V3 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R8 exports with zero cross fired optocoupler U4 inside the control pole K41 and the first anode K42 that are connected in parallel to bidirectional thyristor V4 after optical controlled bidirectional thyrister is connected again.
In Commutation control unit, control section comprises control power module, zero passage detection module, single chip control module, the given module of brightness, and embodiment circuit as shown in Figure 5.
Controlling power module input single-phase 220V AC power, exporting the first DC supply VDD1 for providing to Commutation control unit.In Fig. 5 embodiment, control power module and be made up of diode D01, diode D02, diode D03, diode D04, electric capacity C1, resistance R01, voltage-stabiliser tube DW01.Diode D01, diode D02, diode D03, diode D04 composition control power supply single-phase rectification bridge; Electric capacity C1 strobes, and is connected in parallel on the commutating voltage output controlling power supply single-phase rectification bridge; Resistance R01, voltage-stabiliser tube DW01 form voltage stabilizing circuit.First DC supply VDD1 exports from voltage-stabiliser tube DW01 negative electrode.The rectification negative polarity end controlling power supply single-phase rectification bridge is publicly.
Control power module and can also adopt other implementations.The control power supply single-phase rectification bridge of diode D01, diode D02, diode D03, diode D04 composition can replace with single-phase rectification bridge stack, and the voltage stabilizing circuit of resistance R01, voltage-stabiliser tube DW01 composition can adopt DC/DC pressurizer or three terminal regulator to replace.
Zero passage detection module is detection shaping circuit, is provided with zero-crossing pulse output and exports zero-crossing pulse.In Fig. 5 embodiment, zero passage detection module is made up of diode D1, resistance R9, voltage-stabiliser tube DW1.The two ends of resistance R9 are connected to diode D1 negative electrode and voltage-stabiliser tube DW1 negative electrode respectively, and diode D1 anode is connected to phase line input terminal L, and voltage-stabiliser tube DW1 anode is connected to publicly.Voltage-stabiliser tube DW1 negative electrode is the zero-crossing pulse output exporting zero-crossing pulse.
The given module of brightness is provided with brightness Setting signal output, output brightness Setting signal.In Fig. 5 embodiment, the given module of brightness is BCD rotary encoder, and the brightness Setting signal of output is BCD coding 0000-1001, and wherein, BCD coding 0001-1001 represents brightness 1-9, when BCD is encoded to 0000, represents brightness 0, extinguishes LED.
The given module of brightness also can adopt potentiometer to carry out dividing potential drop to the first DC supply VDD1, and the brightness Setting signal obtained is the given voltage of brightness.The given average voltage of brightness that potentiometer exports is divided into
n+ 1 interval, minimum voltage is interval corresponding with the coding 0000 of BCD rotary encoder, is the brightness 0 in brightness degree; Other intervals respectively with brightness 1-
ncorresponding;
nfor being more than or equal to the integer of 2, representative value is 9.
Single chip control module includes 1 tunnel brightness Setting signal input, 1 road signal acquisition input, 2 tunnel level signal outputs.1 tunnel brightness Setting signal input is connected to the brightness Setting signal output of the given module of brightness; 1 road signal acquisition input is connected to the zero-crossing pulse output of zero passage detection module, input zero-crossing pulse; 2 tunnel level signal outputs, for exchanging control output end KJ, rectify control output KZ, are connected to the interchange control input end KJ of trigger control module, rectify control input KZ respectively.
In Fig. 5 embodiment, single chip control module is made up of single-chip microprocessor MCU 1, crystal oscillator XT1, and the model of single-chip microprocessor MCU 1 is MSP430G2553.The P1.7-P1.4 of single-chip microprocessor MCU 1 is brightness Setting signal input, and the BCD coding of the given module of brightness inputs from P1.7-P1.4.If the given module of brightness adopts potentiometer, then the analog voltage input A0(P1.0 of single-chip microprocessor MCU 1) be brightness Setting signal input, the output voltage of potentiometer is connected to the analog voltage input A0(P1.0 of single-chip microprocessor MCU 1).Single-chip microprocessor MCU 1 by reading the BCD coding of P1.7-P1.4 input, or carries out A/D conversion to the given voltage of brightness that analog voltage input A0 inputs, and obtains the brightness degree of brightness Setting signal.The P2.0 of single-chip microprocessor MCU 1 is signal acquisition input, is connected to the zero-crossing pulse output of zero passage detection module.P1.1, P1.2 of single-chip microprocessor MCU 1 are level signal outputs, and wherein P1.1 is interchange control output end KJ, P1.2 is rectify control output KZ; Exchange interchange control input end KJ, rectify control input KZ that control output end KJ, rectify control output KZ are connected to trigger control module respectively.
First controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 of Commutation control unit export controlled rectification voltage, and Commutation control unit sends the brightness control signal of different brightness degree by controlling continuous print rectified waveform periodicity in controlled rectification voltage.The voltage effective value of the single-phase 220V AC power that effective value and the Commutation control unit of controlled rectification voltage input is identical.
In brightness control signal, brightness degree continuous print rectified waveform periodicity represents.In embodiment, brightness control signal has brightness 1-
n, altogether
nindividual brightness degree.When the brightness degree of brightness Setting signal is brightness 0, Commutation control unit closes LED, does not send brightness control signal.The brightness 1-of brightness control signal brightness degree
nwith the brightness 1-of brightness Setting signal brightness degree
nbetween one_to_one corresponding.
Cycle in rectified waveform periodicity is power frequency period, and described power frequency period is 20ms; The quantity of rectified waveform periodicity power frequency period shared by rectified waveform; The rectified waveform in 1 cycle is made up of 2 rectified half-waves, and first rectified half-waves is corresponding with single-phase 220V AC power positive half wave, and it is corresponding that second rectified half-waves and single-phase 220V AC power bear half-wave.
During Commutation control unit transmission brightness control signal, waveform example as shown in Figure 6.The brightness control signal of to be brightness degree the be brightness 3 sent shown in Fig. 6.
It is brightness that single chip control module sends a brightness degree
kthe step of brightness control signal as follows:
Step 1, waits for, until enter step 2 when receiving the rising edge of zero-crossing pulse;
Step 2, stops exchanging output, starts rectification and exports;
Step 3, to the zero-crossing pulse rising edge counting received, until count value reaches
ktime enter step 4;
Step 4, stops rectification exporting, and starts to exchange to export.
Do not close LED, Commutation control unit is not when normal maintenance sends brightness control signal state, single chip control module controls to exchange control output end KJ and exports useful signal, rectify control output KZ exports invalid signals, the input LEDs ON of zero cross fired optocoupler U1 and U2, the input light-emitting diode cut-off of zero cross fired optocoupler U3 and U4, bidirectional thyristor V1, bidirectional thyristor V2 conducting, bidirectional thyristor V3, bidirectional thyristor V4 ends, first controlled rectification lead-out terminal AC1, the controlled rectification voltage that second controlled rectification lead-out terminal AC2 exports is alternating voltage.In the embodiment shown in fig. 4, the interchange control output end KJ of single chip control module output, the signal of rectify control output KZ are Low level effective.
The zero-crossing pulse that the module of zero passage detection shown in Fig. 5 exports is corresponding with the positive half wave of the single-phase 220V AC power that Commutation control unit inputs, and the width of zero-crossing pulse is less than positive half wave width.Single chip control module enters step 2 after the zero-crossing pulse rising edge corresponding with half-wave in Fig. 61 being detected.Described stopping exchanges and exports, and starts rectification and exports, and refers to that controlling to exchange control output end KJ exports invalid signals, stops exchanging exporting; Rectify control output KZ exports useful signal, starts rectification and exports; The input light-emitting diode cut-off of zero cross fired optocoupler U1 and U2, the input LEDs ON of zero cross fired optocoupler U3 and U4.From the next zero crossing of the single-phase 220V AC power of Commutation control unit input, namely zero crossing 2 as shown in Figure 6 starts, bidirectional thyristor V1, bidirectional thyristor V2 end, bidirectional thyristor V3, bidirectional thyristor V4 conducting, the controlled rectification voltage that the first controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 export is commutating voltage.To continuously
kafter the alternating voltage ripple in individual cycle carries out rectification, single chip control module is to the zero-crossing pulse rising edge counting received, and count value reaches
ktime, in the embodiment shown in fig. 6, the 3rd zero-crossing pulse count down to is corresponding with half-wave in Fig. 63, rectification is now stopped to export, start to exchange and export, then at next zero crossing, namely zero crossing 4 as shown in Figure 6 starts, bidirectional thyristor V1, bidirectional thyristor V2 conducting, bidirectional thyristor V3, bidirectional thyristor V4 end, the controlled rectification voltage that first controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 export is alternating voltage, and Commutation control unit is got back to normal maintenance and do not sent brightness control signal state.
Commutation control unit sends the method for brightness control signal as shown in Figure 7, comprising:
Steps A, reads brightness Setting signal;
Step B, judges whether to close LED, is, controls to close LED, forwards step D to; Otherwise forward step C to;
Step C, sends a brightness control signal;
Step D, judges whether brightness changes, and brightness changes, and returns step B; Brightness does not change, and returns step D.
Judge whether that the method for closing LED judges whether the brightness degree of brightness Setting signal is brightness 0; LED is closed when brightness degree is brightness 0.Judge that the method whether brightness changes is, judge whether the brightness degree of brightness Setting signal changes.
The method controlling to close LED is, stops rectification exporting, and stops exchanging exporting; Now the first controlled rectification lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 do not export controlled rectification voltage.
The structure of LED brightness adjusting unit as shown in Figure 8, is made up of adjustment power module, waveform sampling module, single-chip microcomputer adjustment module, LED drive module.
The adjustment portion of LED brightness adjusting unit comprises adjustment power module, waveform sampling module, single-chip microcomputer adjustment module, and embodiment as shown in Figure 9.
Power module is regulated to provide the second DC supply VDD2 for LED brightness adjusting unit.In Fig. 9 embodiment, power module is regulated to be made up of diode D05, diode D06, diode D07, diode D08, electric capacity C2, resistance R02, voltage-stabiliser tube DW02.Diode D05, diode D06, diode D07, diode D08 composition regulates power supply single-phase rectification bridge; Electric capacity C2 is connected in parallel on the commutating voltage output regulating power supply single-phase rectification bridge, strobes; Resistance R02, voltage-stabiliser tube DW02 form voltage stabilizing circuit.Second DC supply VDD2 exports from voltage-stabiliser tube DW02 negative electrode.The rectification negative polarity end of power supply single-phase rectification bridge is regulated to be with reference to ground.
Regulate power module can also adopt other implementations.The adjustment power supply single-phase rectification bridge of diode D05, diode D06, diode D07, diode D08 composition can replace with single-phase rectification bridge stack, and the voltage stabilizing circuit of resistance R02, voltage-stabiliser tube DW02 composition can adopt DC/DC pressurizer or three terminal regulator to replace.
Waveform sampling module is detection shaping circuit, is provided with sampling Waveform Input end and sampling pulse output.In Fig. 9 embodiment, waveform sampling module is made up of diode D2, resistance R12, voltage-stabiliser tube DW2.The two ends of resistance R12 are connected to diode D2 negative electrode and voltage-stabiliser tube DW2 negative electrode respectively; Diode D2 anode is sampling Waveform Input end, is connected to the first controlled rectification input terminal AC1; Voltage-stabiliser tube DW2 anode is connected to reference to ground; Voltage-stabiliser tube DW2 negative electrode is sampling pulse output.
Single-chip microcomputer adjustment module has seizure input and pwm pulse output, catches the sampling pulse output that input is connected to waveform sampling module.In Fig. 9 embodiment, single-chip microcomputer adjustment module is made up of single-chip microprocessor MCU 2, crystal oscillator XT2, and the model of single-chip microprocessor MCU 2 is MSP430G2553, and the seizure input of single-chip microprocessor MCU 2 is P2.0, and pwm pulse output is P1.2.
LED drive module is used for driving LED lamp and lights, the LED drive module that be provided with PWM brightness regulated signal input, transformer can not be adopted directly to access 220V AC power or direct input more than 300V DC power supply can be applicable to the utility model, is only one of them embodiment circuit shown in Figure 10.The PWM brightness regulated signal input of LED drive module is connected to the pwm pulse output of single-chip microcomputer adjustment module.
In Figure 10, LED drive module is made up of LED driver U5, diode D11, diode D12, diode D13, diode D14, electric capacity C3, electric capacity C4, inductance L G, fast recovery diode D15, switching tube VD, resistance R14, resistance R15.The model of LED driver U5 is HV9910.
In Figure 10, diode D11, diode D12, diode D13, diode D14 form single phase bridge type rectifier circu.2 ac input ends of single phase bridge type rectifier circu are connected to the first controlled rectification input terminal AC1 and the second controlled rectification input terminal AC2 respectively, direct current exports negative terminal and is connected to reference to ground, and direct current output plus terminal is connected to electric capacity C3 positive pole, the power input VIN of LED driver U5, one end of inductance L G, fast recovery diode D15 negative electrode.The ground input GND of LED driver U5 is connected to reference to ground.Electric capacity C3 negative pole is connected to reference to ground.As the positive polarity link LED+ of other one end of the negative polarity link LED-of high-powered LED lamp, inductance L G as high-powered LED lamp after the drain electrode of fast recovery diode D15 anode and switching tube VD connects.The LED current test side CS of LED driver U5 is connected to after the source electrode of switching tube VD and resistance R14 mono-client link; The other end of resistance R14 is connected to reference to ground.The grid of switching tube VD is connected to the drive end GATE of LED driver U5.One end of resistance R15 is connected to the frequency of oscillation control end RT of LED driver U5, the other end is connected to reference to ground.Electric capacity C4 positive pole is connected to the control voltage output VDD of LED driver U5 and linear current control end LD, negative pole are connected to reference to ground.The enable control end PWM_D of LED driver U5 is PWM brightness regulated signal input.LED is connected to positive polarity link LED+ and negative polarity link LED-.
LED brightness adjusting unit receives brightness control signal and adjusting brightness of LED lamps, and its method as shown in figure 11, comprising:
Step one, initialization, the original intensity grade of setting LED;
Step 2, regulates LED luminance;
Step 3, has judged whether brightness control signal; There is no brightness control signal, return step 3; There is brightness control signal, forward step 4 to;
Step 4, receives brightness control signal;
Step 5, returns step 2.
The original intensity grade of LED can be set as
none in individual brightness degree, such as, setting original intensity grade is grade 1.
The method of LED luminance is regulated to be that single-chip microcomputer adjustment module calculates PWM value according to the brightness degree of the LED set or receive, and sends corresponding pwm pulse.
Judged whether brightness control signal, method is judge whether the controlled rectification voltage inputted from the first controlled rectification input terminal AC1, the second controlled rectification input terminal AC2 is commutating voltage.
Receive brightness control signal, method judges continuous print rectified waveform periodicity in controlled rectification voltage; Have in controlled rectification voltage continuously
kduring individual cycle rectified waveform, the brightness degree of brightness control signal is brightness
k.
The function of waveform sampling module carries out detection shaping to controlled rectification voltage.In Fig. 9 embodiment, the sampling Waveform Input end of waveform sampling module is connected to the first controlled rectification input terminal AC1, is detected by the first controlled rectification input terminal AC1 current potential and amplitude limit obtains sampling pulse higher than the waveform of the second controlled rectification input terminal AC2.In brightness control signal brightness degree be the sampling pulse example of brightness 3 as shown in Figure 6 (b).When controlled rectification voltage is alternating voltage, sampling pulse be duty ratio be less than 50%, with the square wave of alternating voltage same frequency; When controlled rectification voltage is commutating voltage, the square wave that sampling pulse is duty ratio close to 100%, frequency is alternating current voltage frequency 2 times.In Fig. 6 (b), the rectified waveform in continuous 3 cycles makes to occur 6 narrow negative pulses such as pulse 5-10 in sampling pulse, and when alternating current voltage frequency is power frequency 50Hz, the cycle of narrow negative pulse is 10ms; The parameter correlations such as narrow negative pulse width is no more than 1ms, the amplitude of concrete width and resistance R12, voltage-stabiliser tube DW2 and controlled rectification voltage.
The sampling Waveform Input end of waveform sampling module also can be connected to the second controlled rectification input terminal AC2, waveform sampling module is detected lower than the waveform of the second controlled rectification input terminal AC2 by the first controlled rectification input terminal AC1 current potential and amplitude limit obtains sampling pulse, exports the seizure input of single-chip microcomputer adjustment module to; Now, in brightness control signal brightness degree be the sampling pulse example of brightness 3 as shown in Figure 6 (c); When controlled rectification voltage is alternating voltage, sampling pulse be duty ratio be less than 50%, with the square wave of alternating voltage same frequency; When controlled rectification voltage is commutating voltage, sampling pulse is low level, and in Fig. 6 (c), the rectified waveform in continuous 3 cycles makes to occur the low level pulse of width slightly larger than 70ms in sampling pulse, i.e. pulse 11.
Judge that the method for continuous print rectified waveform periodicity in controlled rectification voltage is: single-chip microcomputer adjustment module is that narrow negative pulse number in the square wave of alternating current voltage frequency 2 times counts to sampling pulse medium frequency, and count value is 2
ktime, in controlled rectification voltage, continuous print rectified waveform periodicity is
k; Or single-chip microcomputer adjustment module in sampling pulse more than 20ms low level pulse measure width, if measure obtain more than the low level pulse width of 20ms be
t, then in controlled rectification voltage, continuous print rectified waveform periodicity is
k=INT(
t/20), the function of INT function is that fractions omitted part rounds.
Controlled rectification voltage is directly powered to the adjustment power module of LED brightness adjusting unit, LED drive module and waveform sampling module, first adjustment power module wherein, LED drive module carry out rectification to controlled rectification voltage, again after capacitor filtering, provide power supply to interlock circuit; When controlled rectification voltage is zero, the source current of adjustment power module, LED drive module is also zero; Waveform sampling module is non-linear resistive load, and when controlled rectification voltage is zero, the source current of waveform sampling module is zero.Therefore, when controlled rectification voltage is zero, it is zero to the source current that LED brightness adjusting unit provides.So, Commutation control unit carries out stopping at the zero crossing of the single-phase 220V AC power of input to exchange output, starts rectification output, or stop rectification export, start exchange export switching time, can the successful change of current between bidirectional thyristor V1, bidirectional thyristor V2 and bidirectional thyristor V3, bidirectional thyristor V4, unlikelyly cause power supply short circuit.
The brightness Setting signal of the analog voltage form that single-chip microprocessor MCU 1 provides according to the given module of brightness or digital form and the zero-crossing pulse received, control sends triggering signal, and the width of sampling pulse that inputs according to pulse capture input of single-chip microprocessor MCU 2 or quantity identify brightness control signal, sending the brightness that pwm signal controls LED, is the routine techniques that those skilled in the art grasp.
The utility model has following features:
1. the brightness of power line far distance controlled LED is adopted, without the need to remote controller, without the need to control line;
2. LED brightness can be divided into multiple grade as required, has function of turning off the light;
3. rectified wave is adopted to transmit brightness control signal, the reduction of flicker and power factor when can not cause LED brightness regulation.
Claims (6)
1. a controlled rectification remote LED lamp light adjusting circuit, is characterized in that:
Be made up of Commutation control unit and LED brightness adjusting unit;
Described Commutation control unit is provided with phase line input terminal, zero line input terminal, the first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal; Described phase line input terminal, zero line input terminal input single-phase 220V AC power; Described first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal export controlled rectification voltage;
Described LED brightness adjusting unit is provided with the first controlled rectification input terminal, the second controlled rectification input terminal, and described first controlled rectification input terminal, the second controlled rectification input terminal are connected to the first controlled rectification lead-out terminal, the second controlled rectification lead-out terminal of Commutation control unit respectively;
Described Commutation control unit by controlling power module, controllable rectifier module, zero passage detection module, single chip control module, trigger control module, the given module of brightness form;
Described control power module input single-phase 220V AC power, export the first DC supply, be made up of control power supply single-phase rectification bridge and the first filter regulator circuit; The rectification negative polarity end of described control power supply single-phase rectification bridge is publicly;
Described controllable rectifier module is made up of rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2, bidirectional thyristor V3, bidirectional thyristor V4; 2 ac input ends of described rectifier bridge UR1 are connected to phase line input terminal and zero line input terminal respectively, and rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, and rectification exports the second plate that negative terminal is connected to bidirectional thyristor V4; The first controlled rectification lead-out terminal is connected to after the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3; The second plate of bidirectional thyristor V1 is connected to phase line input terminal; The second controlled rectification lead-out terminal is connected to after the first anode of bidirectional thyristor V2 is in parallel with the first anode of bidirectional thyristor V4; The second plate of bidirectional thyristor V2 is connected to zero line input terminal;
Described trigger control module is made up of zero cross fired optocoupler U1, zero cross fired optocoupler U2, zero cross fired optocoupler U3, zero cross fired optocoupler U4, input current-limiting resistance R1, input current-limiting resistance R2, input current-limiting resistance R3, input current-limiting resistance R4, output current limiting resistance R5, output current limiting resistance R6, output current limiting resistance R7, output current limiting resistance R8, is provided with and exchanges control input end, rectify control input;
The inside of described zero cross fired optocoupler U1, zero cross fired optocoupler U2, zero cross fired optocoupler U3, zero cross fired optocoupler U4 includes input light-emitting diode and exports optical controlled bidirectional thyrister;
Be connected in parallel to the first DC supply again and exchange control input end after described input current-limiting resistance R1 connects with the input light-emitting diode of zero cross fired optocoupler U1; Be connected in parallel to the first DC supply again and exchange control input end after input current-limiting resistance R2 connects with the input light-emitting diode of zero cross fired optocoupler U2; The first DC supply and rectify control input is connected in parallel to again after input current-limiting resistance R3 connects with the input light-emitting diode of zero cross fired optocoupler U3; The first DC supply and rectify control input is connected in parallel to again after input current-limiting resistance R4 connects with the input light-emitting diode of zero cross fired optocoupler U4;
Described output current limiting resistance R5 exports with zero cross fired optocoupler U1 inside the control pole and the first anode that are connected in parallel to bidirectional thyristor V1 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R6 exports with zero cross fired optocoupler U2 inside the control pole and the first anode that are connected in parallel to bidirectional thyristor V2 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R7 exports with zero cross fired optocoupler U3 inside the control pole and the first anode that are connected in parallel to bidirectional thyristor V3 after optical controlled bidirectional thyrister is connected again; Output current limiting resistance R8 exports with zero cross fired optocoupler U4 inside the control pole and the first anode that are connected in parallel to bidirectional thyristor V4 after optical controlled bidirectional thyrister is connected again;
Described zero passage detection module is made up of diode D1, resistance R9, voltage-stabiliser tube DW1, is provided with zero passage voltage input, zero-crossing pulse output; The two ends of resistance R9 are connected to diode D1 negative electrode and voltage-stabiliser tube DW1 negative electrode respectively; Diode D1 anode is zero passage voltage input, is connected to phase line input terminal; Voltage-stabiliser tube DW1 anode is connected to publicly; Voltage-stabiliser tube DW1 negative electrode is zero-crossing pulse output;
The given module of described brightness is provided with brightness Setting signal output;
The given module of described brightness is BCD rotary encoder, and described brightness Setting signal is BCD coding;
Described single chip control module includes brightness Setting signal input, signal acquisition input and two-way level signal output; Described brightness Setting signal input is connected to the brightness Setting signal output of the given module of brightness; Described signal acquisition input is connected to the zero-crossing pulse output of zero passage detection module; Described two-way level signal output is respectively and exchanges control output end, rectify control output; Described interchange control output end, rectify control output are connected to interchange control input end, the rectify control input of trigger control module respectively;
Described LED brightness adjusting unit forms by regulating power module, waveform sampling module, single-chip microcomputer adjustment module, LED drive module;
Described adjustment power module inputs controlled rectification voltage, exports the second DC supply, is made up of adjustment power supply single-phase rectification bridge and the second filter regulator circuit; The rectification negative polarity end of described adjustment power supply single-phase rectification bridge is with reference to ground;
Described waveform sampling module is provided with sampling Waveform Input end and sampling pulse output, is made up of diode D2, resistance R12, voltage-stabiliser tube DW2; The two ends of resistance R12 are connected to diode D2 negative electrode and voltage-stabiliser tube DW2 negative electrode respectively; Diode D2 anode is sampling Waveform Input end, is connected to the first controlled rectification input terminal; Voltage-stabiliser tube DW2 anode is connected to reference to ground; Voltage-stabiliser tube DW2 negative electrode is sampling pulse output;
Described single-chip microcomputer adjustment module has seizure input and pwm pulse output, catches the sampling pulse output that input is connected to waveform sampling module;
Described LED drive module is used for driving LED lamp and lights, and is provided with PWM brightness regulated signal input; Described PWM brightness regulated signal input is connected to the pwm pulse output of single-chip microcomputer adjustment module; The input direct voltage upper limit of described LED drive module is greater than 300V.
2. controlled rectification remote LED lamp light adjusting circuit according to claim 1, is characterized in that: described control power module is made up of diode D01, diode D02, diode D03, diode D04, electric capacity C1, resistance R01, voltage-stabiliser tube DW01; Diode D01, diode D02, diode D03, diode D04 composition control power supply single-phase rectification bridge; Electric capacity C1 is connected in parallel on the commutating voltage output controlling power supply single-phase rectification bridge; Resistance R01, voltage-stabiliser tube DW01 form voltage stabilizing circuit; Described first DC supply exports from voltage-stabiliser tube DW01 negative electrode.
3. controlled rectification remote LED lamp light adjusting circuit according to claim 1, is characterized in that: described adjustment power module is made up of diode D05, diode D06, diode D07, diode D08, electric capacity C2, resistance R02, voltage-stabiliser tube DW02; Diode D05, diode D06, diode D07, diode D08 composition regulates power supply single-phase rectification bridge; Electric capacity C2 is connected in parallel on the commutating voltage output regulating power supply single-phase rectification bridge; Resistance R02, voltage-stabiliser tube DW02 form voltage stabilizing circuit; Described second DC supply exports from voltage-stabiliser tube DW02 negative electrode.
4. controlled rectification remote LED lamp light adjusting circuit according to claim 1, is characterized in that: described single chip control module is made up of single-chip microprocessor MCU 1, crystal oscillator XT1; The model of described single-chip microprocessor MCU 1 is MSP430G2553.
5. controlled rectification remote LED lamp light adjusting circuit according to claim 1, is characterized in that: described single-chip microcomputer adjustment module is made up of single-chip microprocessor MCU 2, crystal oscillator XT2; The model of described single-chip microprocessor MCU 2 is MSP430G2553.
6. controlled rectification remote LED lamp light adjusting circuit according to claim 1, is characterized in that: described LED drive module is made up of LED driver U5, diode D11, diode D12, diode D13, diode D14, electric capacity C3, electric capacity C4, inductance L G, fast recovery diode D15, switching tube VD, resistance R14, resistance R15; The model of described LED driver U5 is HV9910.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520475515.7U CN204761794U (en) | 2015-07-06 | 2015-07-06 | Remote LED lamp dimmer circuit of controllable rectification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520475515.7U CN204761794U (en) | 2015-07-06 | 2015-07-06 | Remote LED lamp dimmer circuit of controllable rectification |
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| Publication Number | Publication Date |
|---|---|
| CN204761794U true CN204761794U (en) | 2015-11-11 |
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ID=54476456
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|---|---|---|---|
| CN201520475515.7U Expired - Fee Related CN204761794U (en) | 2015-07-06 | 2015-07-06 | Remote LED lamp dimmer circuit of controllable rectification |
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| Country | Link |
|---|---|
| CN (1) | CN204761794U (en) |
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2015
- 2015-07-06 CN CN201520475515.7U patent/CN204761794U/en not_active Expired - Fee Related
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Granted publication date: 20151111 Termination date: 20160706 |