CN1635823A - Micro-control electronic ballast system for high-intensity discharge lamp - Google Patents
Micro-control electronic ballast system for high-intensity discharge lamp Download PDFInfo
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- CN1635823A CN1635823A CN 200310124544 CN200310124544A CN1635823A CN 1635823 A CN1635823 A CN 1635823A CN 200310124544 CN200310124544 CN 200310124544 CN 200310124544 A CN200310124544 A CN 200310124544A CN 1635823 A CN1635823 A CN 1635823A
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Abstract
An electronic ballast system for high strength, which contains power factor correcting circuit, compensation type adjusting power source, DC-AC converter with 150 Hz work frequency, electronic igniter circuit, power control circuit and microprocessor IC, wherein the microprocessor IC contains the device for inducing voltage and current, device for controlling output power to ballast, activating device for controlling igniter and device used for external circuit serial communication.
Description
Invention field
The present invention disclosed a kind of be used for 35 and 70[watt] the intelligent electric ballast system of gaseous discharge lamp.Particularly; the present invention relates to be used for the microcontroller electronic ballast system of high-intensity discharge (HID) lamp; it has at short circuit, overheated, the safety of power network overvoltage and the characteristics of protection, a kind of system that improves its power factor and radio-frequency transmissions and release and be sent to the electromagnetic interference in the environment.Reach 30% the useful life that this ballast has promoted lamp and equipment, will be reduced to less than 10% with the dependent loss of work, and observe the international standard relevant with this device.
Be used for the description of the technology of this exploitation
Usually, lighting apparatus mainly is made up of lamp, ballast, the capacitor that is used for some igniter of our interested lamp (gaseous discharge lamp) and is used to implement corresponding power factor correction.
Known, the electric current of lamp must flow through the bulb with two electrodes that comprise certain class gas, this lamp will have the reversal voltage-current characteristic, if promptly electric current is lower or be zero, then be used for keeping the operating voltage of this electric current necessary higher, and on the contrary,, then be used for keeping the operating voltage of this electric current must be lower if electric current is higher.For this situation owing to there is not current cycle to pass through lamp, so must apply be much higher than the equipment rated operational voltage potential pulse so that the circulation of setting up electric current.This voltage peak is provided by igniter.In case current cycle is by lamp, then because aforesaid reverse characteristic must limit it, this can make this electric current ad infinitum increase.This restriction is provided by the inductive type reactance that is connected serially to electric current (reactance coil (ractor) or ballast).
Those of transformer are promptly used in the electromagnetic ballast, are developed and implement this Current Control.Transformer is as current source, and it provides the effect that limits electric current and the high impedance that spot did not have.When lamp was connected, voltage was near 0, and when lamp is stablized, turned back to normal current potential.But in order to increase the inductance of transformer, the winding of transformer needs big winding (coil), and this can make the efficient step-down of this class ballast.In addition, the electromagnetic ballast operate as normal is on the frequency between 50 and 60 hertz, and this causes the shortcoming of noise and stroboscopic effect.
The height that high efficiency, low-loss, low capacity and weight, low noise and external control have occurred having is electric ballast easily, as the solution of these shortcomings.As technically known, conventional electronic ballast system is formed by converter circuit and phase inverter circuit, and it provides AC power to lamp.All has the alternative of a large amount of structures and control in these parts each.
Goal of the invention
Owing to have multiple high strength (HID) lamp that contains the different operating characteristic.
So need a kind of electric ballast, it allows to handle these different qualities of lamp and does not need to revise the circuit that constitutes it, it can with aptitude manner by some pre-programmed the electronic installation induction and control different electronic system steps so that obtain the optimum useful life of lamp and associated electronic circuit.
Therefore, purpose of the present invention is as follows:
-being provided for the intelligent electric ballast of HID lamp, it can be made decision automatically according to the general analysis of lamp and equipment.
-to implement working condition, the lamp of its self-monitoring, supervising device and lamp residing and allow control to pass to useful life longevity stage of lamp.
-provide better lamp output and useful life rate.
-electric ballast that makes it to be suitable for dissimilar gaseous discharge lamps with minimum hardware change is provided.
-the microcontroller electric ballast of observing the different international standards be applied to the type equipment is provided.
-implement high reliability equipment, it has the safety system that is used for people's safety and its installation site.
Summary of drawings
Fig. 1 illustrates the electric ballast that comprises this exploitation and the general block diagram of different step.
Fig. 2 illustrates and is similar to 70[watt] block diagram of the electric ballast that proposes among the present invention of electric ballast (35[watt] power).
Fig. 3 illustrates the flow chart of used control method.
Invention is described
The present invention relates to be used to encourage the microcontroller electronic ballast system of high-intensity discharge (HID) lamp.Fig. 1 illustrates the electric ballast that comprises this exploitation and the block diagram of different step.
1) input step and line filter
2) prerotation parallel operation and power factor correction
3) main switch transducer
4) direct current is to a-c transducer, pulse transformer and ignition system
5) the embedding control system of usefulness microprocessor controls
As shown in Figure 1, this microcontroller electronic ballast system is made of line filter, this filter provides the unwanted intermediate frequency from the electrical network to the ballast and the filtering of high-frequency signal in input step, and the meeting that it also produces the electronic system of ballast finally damages intermediate frequency and the high-frequency signal filtering of electric distribution grid (electrical distribution grid).By such filter, eliminated the parasitic frequency of scope from 10KHz to the signal that surpasses 30MHz, described parasitic frequency is the product of a large amount of conversions of the equipment generation on its inside.Subsequently, can observe the step of pre-converted and power factor correction.Do not have abovementioned steps, owing to be used for the intrinsic characteristic of the lamp type of such equipment, between the waveform of electric current and voltage, produce very strong differing, because these device rendered low power factors make this cause higher reactive power.The use by aligning step and the improvement of power factor can obtain to be equal to or greater than 98% factor of entire equipment; This step also allows harmonic and stablizes the output voltage of this module, the step before described voltage will enter subsequently.
Next procedure is that this voltage offers transducer with compensation (Buck) the type adjuster source of voltage-regulation at 88 Fu Chu.In addition, its protective circuit is not subjected to the undue consumption of load (lamp) possibility electric current present.
DC-AC transducer as shown in Figure 2 is with the 150[hertz] frequency send alternating current to lamp, it allows the voltage power supply of the latter with 20-400 volt scope, this can make illumination stable, has therefore reduced stroboscopic effect; Because combine to lamp this square-wave signal that makes the voltage that lamp is switched on or switched off is provided, it can not discovered (having eliminated unwanted flicker) by naked eyes.
By software control of developing and the ignition system of in microcontroller, programming by Interlight, as shown in Figure 2 electronic ignition circuit allows by transmitting the 4-5[kilovolt] the logical HID lamp of inceptive impulse serial connection, can turn on the lamp in its operate as normal boundary and useful life fast.Can also realize the longer useful life of lamp by this ignition system.
The description of used ignition system
Below described the ignition order of electric ballast of the present invention in detail:
Before ignition order, in ballast output, there is not voltage.In case the igniting of lamp begins, packet of pulses in the frame (frame) of several pulses or string and each all have the 200[millisecond] continue, this frame or string comprise have the 4[kilovolt] 8 pulse spacings of amplitude, and be superimposed upon on the direct voltage of 400Vdc.In case realized the igniting of lamp, then extinguish high voltage pulse and ballast and automatically output voltage is adjusted to the operating voltage rated value of lamp, produce the 150[hertz by its control system] square-wave voltage, this makes ballast and lamp operate as normal.
Under the lamp working condition of heat and and use defective lamp, ballast produces first firing pulse, beginning is as in normal situation about connecting, detect by control algolithm and can not implement normal igniting, and firing pulse is stopped 5 seconds, produce the igniting string once more and stop 5 seconds again subsequently, the rest may be inferred 10 minutes interval.Subsequently, if do not realize normal the connection in this time period, its normal work is connected and turned back to then ballast control method arrestment work and enter idle condition once more up to it.
The microcontroller electronic ballast system comprises microprocessor integrated circuit as shown in Figure 2 and has the software of the pre-programmed algorithm that allows the enforcement difference in functionality.
Microprocessor integrated circuit is implemented the monitoring and the controlled function of different electronic system steps, the power that allow to use its each analysis and Control to limit by program, and it makes lamp stable, therefore obtains the optimum useful life of lamp.
The function of microprocessor is: the voltage V that induction is conditioned
OutAnd electric current I
OutLevel, this can know the situation of lamp, knows promptly whether it disconnects, exhausts, damage, defectiveness or the like.Use these electric currents and magnitude of voltage by cycling P
Out=V
Out* I
OutThe power output of computing equipment with this power output and corresponding to the reference value of the value of the suitableeest work of allowing (39 watts) and (70 watts) HID lamp relatively, sends to the result digital-to-analogue (D/A) transducer subsequently, and sends to offset-type adjuster source subsequently.Utilize this information to control the power output level of lamp.
Implement the power controlled step by 8 8-digit microcontrollers with its control program separately, determine lamp whether in normal operating power, and if not, power output then stopped.
Also have the device that is used to respond to output voltage and output current level, be used to determine when ballast is worked, when to produce short circuit.This can detect in the time delay of 8 milliseconds [ms], and when detecting short circuit, the power supply of stopping light also reactivated after 1 minute, and is final, if this short circuit problem continues between 10 trial periods, then stops power output and restarts once more up to it.
Another function of microprocessor is the triggering of control electronic ignition circuit, therefore it passes to ignition system with triggering signal in necessary control in the time, be that it transmitted triggering signal and comes exciter during maximum 2 seconds, if fail to realize in this time, then microprocessor will stop power output in one minute.Attempt implementing this process for 10 times, if lamp is not connected between these 10 trial periods, then program will be ended this connection, stay the record indication lamp and do not connect in described microprocessor, and it will no longer be lighted a fire up to restarting ballast once more.
The description of electronic ballast control method
Shown in the flow chart of Fig. 3, can observe the contemplated different step of electronic ballast apparatus control method.
When process begins all control system operating parameters are loaded into memory, these parameters allow microcontroller circuit to implement its each action, enable the input and output port of microcontroller in order to begin control task.In this initialization procedure, with the maximum current level of equipment permission in the output, the optimum operating voltage value of lamp, the power when equipment is started working, the operating frequency in switch source, the scope of the minimum and maximum working temperature of ballast is loaded into memory.
Implement the initialization of microcontroller port in next procedure, by the dial gauge that changes which being shown will be the information input and output port that is used for control appliance.To mainly use three ports that analog signal conversion is become digital signal, they are used for voltage, electric current and the temperature levels of inductive ballasts, for their part, three digital ports add that two analog ports are used for the power of control appliance, and it allows the rated range by the work of qualified point (set point) set device.In case enabled the micro control system port, then begun to obtain the analog signal of voltage, electric current and temperature.
The main program of ballast control system (routine)
By checking that ballast temperature begins, if be lower than the maximum that is allowed, then program is attempted turn-on lamp, if temperature is higher, and then program wait 1 minute and probe temperature level once more, the rest may be inferred.
For turn-on lamp, routine call ' TurnOnlamp ' subprogram is also returned, if the on lamp, then program continues with major cycle, or in the situation that lamp does not have to connect, shut down procedure.
Following task is carried out in the major cycle of control system:
A) it measures three analog variables, that is: voltage, electric current and temperature by ' Measure ' subprogram; The employed power of its calculating lamp is subsequently:
Power=voltage * electric current * time
B) subsequently, program is calculated the mean value that average power content is the nearest power of measuring for 4 times that obtained, implements output voltage and proofreaies and correct if compare the too high or too low then program of the power that is calculated subsequently with the set point that limits before.
C) for safety, implement temperature and galvanoscopy, whether surpassed the restriction to greatest extent of being set up to check them.If this will take place, then program also will attempt carrying out igniting again once more with turn-off lamp.This will carry out 10 minutes maximum time period.If in the normality scope, then program will be returned its normal circulation with normality turn-on lamp and ballast parameter, if this does not take place, then ballast will stop turn-off lamp and ballast operation.
Turning?on?the?Lamp：
This program is responsible for firing pulse is sent to lamp with its connection.
200 milliseconds of time lapses at per second send the pulse group.During 8 seconds, repeat for the first time this process, and measure current value and understand lamp and whether connect, if then this subprogram turns back to its operate as normal circulation.
If lamp keeps disconnecting, then this subprogram is waited for one minute, to during maximum two seconds, attempt once more another firing pulse group and once more test lamp whether connect, connect if realized, then control subprogram will be returned, otherwise, will repeat this connection process afterwards and reach 10 minutes up to the time maximum.
Measurement：
This subprogram reads analog to digital converter (ADC) by sampling: voltage, electric current and temperature, this process repeats 16 times and wherein returns this three mean values that read parameter.
During having the normal ballast duty cycle of 150 hertz frequency scopes, call this subprogram.
Timer?Interruption：
When it was in normal operation, this program was called by interrupt management and with 150 hertz cycle and is managed the output voltage frequency that sends to lamp.
Claims (6)
1. a microcontroller electronic ballast system is characterized in that, is made of the electronic installation that comprises with lower module:
Circuit of power factor correction;
Offset-type adjuster source;
The DC-AC transducer has and equals 150 hertz of operating frequencies;
Electronic ignition circuit;
Power control circuit;
The characteristics of microcontroller electronic ballast system are that it comprises microprocessor integrated circuit.
2. the microcontroller electronic ballast system shown in claim 1 is characterized in that, described microprocessor integrated circuit comprises:
The device that is used for induced voltage and levels of current;
Be used to control to the device of the power output of described ballast;
Be used to control the device of the triggering of described igniter; With
Be used for and external circuit series connection communicating devices.
3. microcontroller electronic ballast system as claimed in claim 2 is characterized in that, is used to respond to the voltage (V that is read by microcontroller
Out) and electric current (I
Out) the described device of level allows:
Obtain output power value (P
Out=V
Out* I
Out), described lamp is with described performance number work;
By the microcontroller program described power output valve and reference value are compared; And
Described comparative result is delivered to digital to analog converter, arrives described offset-type adjuster source subsequently, therefore allow to control to the stable power output of described lamp.
4. microcontroller electronic ballast system as claimed in claim 3 is characterized in that, is used for when ballast is worked the output voltage that induction read by microcontroller and the described device of levels of current and allows:
Determine when in output place to produce short circuit, and realize detecting in the time Yanzhong of 8 milliseconds [ms];
The power supply of stopping light is so that connecting after a while; And
If short circuit problem continues between 10 trial periods, then stop power supply output, restart once more up to it.
5. microcontroller electronic ballast system as claimed in claim 3 is characterized in that, described microcontroller is determined lamp whether within operate as normal power, and if not this situation, then stops out-put supply.
6. microcontroller electronic ballast system as claimed in claim 2 is characterized in that, is used for the described device permission that the control point firearm triggers:
When lamp is connected, transmit pulse train at the maximum 2 seconds described lamps of underexcitation;
The connection of lamp if in described maximum 2 seconds, be unrealized, the then time delay that power output is stopped 1 minute;
Implementing 10 times connection again attempts;
If lamp fails to connect between described 10 trial periods, then end described connection;
In described microprocessor, stay record indication lamp access failure; And no longer light a fire and restart (on/off) once more up to ballast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310124544 CN1635823A (en) | 2003-12-31 | 2003-12-31 | Micro-control electronic ballast system for high-intensity discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310124544 CN1635823A (en) | 2003-12-31 | 2003-12-31 | Micro-control electronic ballast system for high-intensity discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1635823A true CN1635823A (en) | 2005-07-06 |
Family
ID=34845034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310124544 Pending CN1635823A (en) | 2003-12-31 | 2003-12-31 | Micro-control electronic ballast system for high-intensity discharge lamp |
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|---|---|
| CN (1) | CN1635823A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105430854A (en) * | 2015-10-29 | 2016-03-23 | 胡军 | CDM lamp start device and method thereof |
-
2003
- 2003-12-31 CN CN 200310124544 patent/CN1635823A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105430854A (en) * | 2015-10-29 | 2016-03-23 | 胡军 | CDM lamp start device and method thereof |
| US10057969B2 (en) | 2015-10-29 | 2018-08-21 | Guangzhou Triz Information Technology Ltd. | Starting device for a CDM lamp and starting method for the same |
| CN105430854B (en) * | 2015-10-29 | 2019-03-19 | 广州萃智信息科技有限公司 | A kind of starter and its method of CDM lamp |
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