CN203086814U - Single-wire RF light modulator based on microcontroller - Google Patents
Single-wire RF light modulator based on microcontroller Download PDFInfo
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- CN203086814U CN203086814U CN 201320037545 CN201320037545U CN203086814U CN 203086814 U CN203086814 U CN 203086814U CN 201320037545 CN201320037545 CN 201320037545 CN 201320037545 U CN201320037545 U CN 201320037545U CN 203086814 U CN203086814 U CN 203086814U
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Abstract
The utility model relates to a single-wire RF light modulator based on a microcontroller. The single-wire RF light modulator is characterized by comprising a power supply module which powers the light modulator with leakage current of a live wire, a single-chip microcomputer, a RF module connected with the single-chip microcomputer for receiving RF remote control signals, a zero cross detection circuit for detecting the zero crossing signals of the alternating current of the live wire and sending the signals to the single-chip microcomputer, a phase control and light modulation circuit which employs two IGBT transistors to control the cutting of waveforms of the positive and reverse phases of the power supply of the live wire to change the effective value of the electric energy supplied to a light, a driving circuit, through with the single-chip microcomputer controls the phase control and light modulation circuit, and a sampling and over-current detection and protection circuit for detecting current flowing through the IGBT transistors to prevent IGBT transistors from being burnt. The single-wire RF light modulator solves the problem that a conventional light modulator is severe in EMI interference and does not support RF remote controlled light modulation and single-wire work conditions. The circuits are simple in structure, and single-wire RF light modulator has promising market value.
Description
Technical field
The utility model relates to light adjusting controller, particularly a kind of one wire system radio frequency dimmer based on microcontroller.
Background technology
At present, light adjusting controller is applied in every field widely, and modal dimmer majority is to adopt the phase-controlled dimming operation on the market, and the single live wire power supply of existing support.The phase-controlled dimming controller is to cut with the sinusoidal voltage ripple of different phase angles to power supply according to the requirement of brightness, thereby changes the brightness of the effective value of output voltage with the adjusting light fixture.
Method according to cutting can be divided into forward position phase-controlled dimming and back along phase-controlled dimming again, and the trim that the forward position phase-controlled dimming adopts is a controllable silicon, and igbt transistor is all adopted along phase-controlled dimming in the back.And no matter phased still back, forward position along phased, will produce high order harmonic component by circuit behind the cutting sine wave, this high order harmonic component will be disturbed and influence power-supply system or influence the work of other electronic equipment.
In addition, most light modulation products on the market all are that the mode that adopts potentiometer to regulate is carried out the light modulation operation at present, though light modulation is accurate, in some occasion inconvenience are arranged still more.And adopt the mode of infrared remote control to carry out light modulation, and remote controller is relative with the necessary straight line of dimmer, and can not there be any shelter the centre, and dimming mode also is still can not satisfy flexible and changeable requirement.Lack and support single live wire supply power mode to allow dimmer be difficult to popularize and replace fast traditional switch enclosure especially.
And at large-power lamp the time, lack favourable Power Limitation safeguard measure, under the situation of overcurrent, easily controllable silicon or igbt transistor are burnt, cause the circuit working paralysis.
Summary of the invention
In view of existing dimmer EMI serious interference on the market; and do not support the present situation of RF remote-controlled light modulation and one wire system condition of work; do not have characteristics such as overcurrent protection, the utility model provides a kind of one wire system radio frequency dimmer based on microcontroller that addresses the above problem.
The utility model adopts following scheme to realize: a kind of one wire system radio frequency dimmer based on microcontroller is characterized in that comprising:
One power module, it is described dimmer powered that this power module relies on the leakage current of live wire;
One single-chip microcomputer;
One radio-frequency module, this radio-frequency module is connected with described single-chip microcomputer, in order to the received RF remote signal;
One zero cross detection circuit sends to described single-chip microcomputer in order to detect live wire zero-crossing of alternating current signal;
One phase-controlled dimmer circuit adopts the cutting of two igbt transistor control live wire power supply positives and anti-phase waveform, and the effective value of light fixture electric energy is provided with change;
One drive circuit, described single-chip microcomputer is controlled described phase-controlled dimmer circuit through this drive circuit; And
One sampling and over-current detection protective circuit is used for detecting the described igbt transistor electric current of flowing through, and avoids this igbt transistor to burn.
In the utility model one embodiment, described power module comprises switching power circuit that is made of LNK304N and the voltage-stabilized power supply circuit that is made of BL1117 that is connected with this Switching Power Supply.
In the utility model one embodiment, described radio-frequency module adopts the SI4432-M1 module, and the direct I/O with described single-chip microcomputer of the SDO of this SI4432-M1 module, SDI, SCK, IRQ, SDN and CS port articulates.
In the utility model one embodiment, described sampling and over-current detection protective circuit design for symmetrical expression, detect the value of feedback of alternating current positive-negative half-cycle respectively, and have output one tunnel to give single-chip microcomputer.
In the utility model one embodiment, the model of described igbt transistor is SPB20N60C.
The beneficial effects of the utility model are:
1. adopt single live wire power supply, the power pack of control circuit is directly supplied with from live wire, need not zero line, just can keep the operate as normal of single-chip microcomputer and wireless receiving module.
2. adopt the 868MHz radiofrequency signal to realize controlling, have the distance of controlling, can the penetrate thing, the advantage that antijamming capability is strong, a machine can match many remote controls, and actual control mode is flexible and changeable.
3. directly send the signal controlling igbt transistor by single-chip microcomputer the power supply sine wave is cut, adopt the forward position phased, light modulation is accurate, disturbs less.
4. stand-by power consumption is low, and is durable in use.
5. Power Limitation defencive function detects power automatic shutdown circuit when exceeding predetermined value.
6. the big AC 60-260V of operating voltage amplitude all can be working properly.
7. can insert rocker switch and realize double mode control.
8. the wireless receiving and dispatching relay function can be the like product coordinating communication in the remote range automatically after the unlatching, increases remote control distance.
Description of drawings
Fig. 1 is the utility model embodiment dimmer hardware catenation principle block diagram.
Fig. 2 is the concrete circuit connection diagram of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
As shown in Figure 1, present embodiment provides a kind of one wire system radio frequency dimmer based on microcontroller, it is characterized in that comprising:
One power module, it is described dimmer powered that this power module relies on the leakage current of live wire;
One single-chip microcomputer;
One radio-frequency module, this radio-frequency module is connected with described single-chip microcomputer, in order to the received RF remote signal;
One zero cross detection circuit sends to described single-chip microcomputer in order to detect live wire zero-crossing of alternating current signal;
One phase-controlled dimmer circuit adopts the cutting of two igbt transistor control live wire power supply positives and anti-phase waveform, and the effective value of light fixture electric energy is provided with change;
One drive circuit, described single-chip microcomputer is controlled described phase-controlled dimmer circuit through this drive circuit; And
One sampling and over-current detection protective circuit is used for detecting the described igbt transistor electric current of flowing through, and avoids this igbt transistor to burn.
The utility model is the one wire system powering mode, the electrodeless light modulation of the RF remote-controlled realization of button, and adopt Single-chip Controlling igbt transistor to be carried out the forward position phase-controlled dimming, the flicker free noiseless.The EMI that has reduced to a certain extent electrical network is produced disturbs.What supply module adopted in the present embodiment is the switching power circuit of setting up for master control IC with LNK304.The peripheral circuit simple components is few and output is stable, and the voltage output of BL1117 voltage stabilizing IC realization 3.3V is adopted in the single-chip microcomputer power supply, and is normal to realize the power supply of single-chip microcomputer and radio-frequency module.What radio-circuit adopted is the SI4432-M1 radio-frequency module, and it has both and sends and the function that receives, and can use as repeater when being necessary, makes a plurality of dimmers coordinating communication of connecting mutually, increases the distance of remote control significantly.Phased circuit has adopted the igbt transistor of two SPB20N60C to control the cutting of positive and anti-phase waveform respectively.According to the reference time point that zero cross detection circuit provides, single-chip microcomputer provides the forward position of output timing Waveform Control transistor switch realization accurately phase-controlled dimming.On the market back along light modulation of contrast, the dimming mode of this circuit can reduce to cut the sinusoidal wave high order harmonic component that is produced to a certain extent, to reduce the pollution to electric power network.Sampling and over-current detection protective circuit feed back to transistorized control pin after amplifying through amplifier by the dividing potential drop that detects the sampling resistor generation, can cut off transistorized input rapidly when electric current, make circuit cut off illuminating line immediately, prevent to burn transistor.Concrete, see also Fig. 2, below in conjunction with Fig. 2 each module is done simple introduction.
1. power module.
Because be to adopt single live wire power supply, supply power mode is different with conventional supply power mode.(as shown in Figure 2) installing under the prerequisite of light fixture, the current trend of the positive half cycle of alternating current is in proper order: live wire input D7, and R3, D1, C1 passes through then with reference to ground, flows through live wire output bulb to zero line by R1 and Q1 again; The current trend of negative half period is in proper order: light fixture is to D8, and then by R3, D1, C1 be through with reference to ground, and again from R2, Q4 flows away to the live wire input interface.Therefore, under the prerequisite that light fixture is not lighted, this power-supply system also still can be powered by the leakage current of light fitting body, and the power supply of keeping whole system is normal.Be carved with under the situation that stands to charge when filter capacitor C1, the switching power circuit of being made up of LNK304N of rear end gets final product normal operation.The 10V voltage that this circuit produces provides power supply for drive IC U1 TC4426, and process BL1117 voltage stabilizing simultaneously is that the voltage of 3.3V is the amplifier in the system, and single-chip microcomputer and radio-frequency module provide effectively stable power supply.
2. radio-frequency module.
This circuit adopts the SI4432-M1 module, operating frequency is 868MHz, this frequency range uses equipment less relatively, disturb also few, relatively and other frequency ranges more reliable, the SDO of this module, SDI, SCK, and IRQ, SDN and CS port I/O direct and single-chip microcomputer articulates, and carries out the reception or the emission of signal by program.The circuit framework is extremely simplified.
3, zero passage detection, phase-controlled dimmer circuit, and drive IC.
Zero passage detection signal in the system is that live wire end alternating current carries out rectification after by equivalent series resistance R8 by D6, the R9 current limliting, under 3.3V reversal connection 1N4148, the 100Hz signal that produces inputs to single-chip microcomputer through the ZERO mouth, no matter alternating current is in positive-negative half-cycle, whenever all sends a signal to single-chip microcomputer during through a zero point.According to the difference of light modulation requirements, single-chip microcomputer clocklike provides high level pulse through drive IC Q3 and Q4 two transistor to be done switch motion fast at output port OUT end, to reach the sinusoidal wave effective waveform of cutting, changes the effective value that electric energy is provided.
Illustrate this process.Suppose and the brightness of light fixture need be adjusted to 50% by 20%.Known domestic interchange point power frequency is 50Hz, so the time of a power cycle is 20ms, each interchange time-of-week thirty is 10ms.Under 20% power supplying efficiency, single-chip microcomputer just at the high level of delivery outlet output 2ms, is ended after whenever detecting the signal that zero passage detection end provides then, treats that next zero passage detection signal repeats above-mentioned action again when coming.The time interval of known each zero passage detection signal is 10ms.Driving transistors conducting in this time period of 0-2ms, thus realize that bright lamp efficient is 20%.This duration adds by remote controller brightness, and single-chip microcomputer is made the instruction that increases the output high level after the radio-frequency module received signal, and by presetting of program, the duration of above-mentioned high level output slowly is promoted to 5ms gradually by 2ms.Thereby realized process from 20% improved efficiency to 50%.Because occur in preceding half section of each 10ms the release time of output high level, so this dimming mode is with the forward position phase-controlled dimming.The advantage of this dimming mode is that the mode of Single-chip Controlling output adjusts, precise and stable, it is very thin that the process of change brightness can quantize time value, can accomplish the same uniform electrodeless light modulation with turn knob potentiometer, and adopt forward position phase-controlled dimming mode, the high order harmonic component of generation is disturbed minimum.
4. take a sample and the over-current detection protective circuit.
This circuit major function is the size that is to detect by electric current, detects the igbt transistor Q1 that flows through constantly, and the electric current of Q4 is to accomplish protecting these two the main core devices as the whole system operate as normal can not take place because of situations such as overcurrent burn.This circuit is respectively at Q1, the R1 in the high-precision little value resistance of series connection 0.05 Europe in two transistorized loops of Q4, R2.The dividing potential drop of positive half cycle R1 end is controlled Q5 through the amplification of amplifier U5 after D9 feeds back in the loop, the switch of Q6, and by can obviously finding out among the figure, Q5, the Q6 conducting is Q1 then, and Q4 ends, and electric current cuts off automatically.This circuit designs for symmetrical expression, detects the value of feedback of positive-negative half-cycle respectively, and has output one tunnel to give the ADC1 pin of single-chip microcomputer, makes things convenient for single-chip microcomputer that its value is carried out real-time sampling.
Illustrate this process, if the circuit set point, power must not surpass 440W, the R1 that when 440W, flows through, and the electric current of R2 is respectively 2A, R1, the dividing potential drop that the R2 place obtains is 0.1V.Via the feedback current process D9 after the amplifier amplification, R30 to Q5, Q6 just makes these two NPN triodes be in the critical value of conducting soon.This moment, circuit still kept operate as normal.When light fixture burns and short circuit during at the voltage negative half cycle unexpected moment, this moment, the dividing potential drop at R2 place increased severely, and the electric current after amplifier is amplified makes Q5 at once, the Q6 conducting, and Q1, Q4 be termination at once immediately also.Circuit is cut off, thereby has avoided Q1, and Q4 is owing to overcurrent burns, and the high level signal that the ADC1 termination is received is also by Single-chip Controlling, and the OUT end is no longer exported high level.Entire circuit is normally quit work.Common potentiometer phase-controlled dimming does not possess this overcurrent protection function, can dimmer be burnt in the lump along band when light fixture burns short circuit yet.
The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (5)
1. one wire system radio frequency dimmer based on microcontroller is characterized in that comprising:
One power module, it is described dimmer powered that this power module relies on the leakage current of live wire;
One single-chip microcomputer;
One radio-frequency module, this radio-frequency module is connected with described single-chip microcomputer, in order to the received RF remote signal;
One zero cross detection circuit sends to described single-chip microcomputer in order to detect live wire zero-crossing of alternating current signal;
One phase-controlled dimmer circuit adopts the cutting of two igbt transistor control live wire power supply positives and anti-phase waveform, and the effective value of light fixture electric energy is provided with change;
One drive circuit, described single-chip microcomputer is controlled described phase-controlled dimmer circuit through this drive circuit; And
One sampling and over-current detection protective circuit is used for detecting the described igbt transistor electric current of flowing through, and avoids this igbt transistor to burn.
2. the one wire system radio frequency dimmer based on microcontroller according to claim 1 is characterized in that: described power module comprises switching power circuit that is made of LNK304N and the voltage-stabilized power supply circuit that is made of BL1117 that is connected with this Switching Power Supply.
3. the one wire system radio frequency dimmer based on microcontroller according to claim 1, it is characterized in that: described radio-frequency module adopts the SI4432-M1 module, and the direct I/O with described single-chip microcomputer of the SDO of this SI4432-M1 module, SDI, SCK, IRQ, SDN and CS port articulates.
4. the one wire system radio frequency dimmer based on microcontroller according to claim 1, it is characterized in that: described sampling and over-current detection protective circuit design for symmetrical expression, detect the value of feedback of alternating current positive-negative half-cycle respectively, and have output one tunnel to give single-chip microcomputer.
5. the one wire system radio frequency dimmer based on microcontroller according to claim 1, it is characterized in that: the model of described igbt transistor is SPB20N60C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320037545 CN203086814U (en) | 2013-01-24 | 2013-01-24 | Single-wire RF light modulator based on microcontroller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320037545 CN203086814U (en) | 2013-01-24 | 2013-01-24 | Single-wire RF light modulator based on microcontroller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103079319A (en) * | 2013-01-24 | 2013-05-01 | 福建侨汇电子科技有限公司 | Single-wire-system radio-frequency light modulator based on microcontroller |
| CN107041026A (en) * | 2015-07-29 | 2017-08-11 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its current detecting and protection control device, method |
| CN112601338A (en) * | 2020-12-10 | 2021-04-02 | 宁波公牛光电科技有限公司 | Lamp and regulating and controlling circuit thereof |
-
2013
- 2013-01-24 CN CN 201320037545 patent/CN203086814U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103079319A (en) * | 2013-01-24 | 2013-05-01 | 福建侨汇电子科技有限公司 | Single-wire-system radio-frequency light modulator based on microcontroller |
| CN103079319B (en) * | 2013-01-24 | 2015-10-14 | 福建侨汇电子科技有限公司 | A kind of Single-wire-system radio-frequency light modulator based on microcontroller |
| CN107041026A (en) * | 2015-07-29 | 2017-08-11 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its current detecting and protection control device, method |
| CN112601338A (en) * | 2020-12-10 | 2021-04-02 | 宁波公牛光电科技有限公司 | Lamp and regulating and controlling circuit thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Single-wire-system radio-frequency light modulator based on microcontroller Effective date of registration: 20150617 Granted publication date: 20130724 Pledgee: China bank Limited by Share Ltd Fuzhou Jinan Branch Pledgor: Fujian Qiaohui Electronic Technology Co.,Ltd. Registration number: 2015350000012 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20160124 |
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| EXPY | Termination of patent right or utility model |