CN106937468A - Electric ballast and its driving method, Metal halogen lamp system for Metal halogen lamp - Google Patents
Electric ballast and its driving method, Metal halogen lamp system for Metal halogen lamp Download PDFInfo
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- CN106937468A CN106937468A CN201511024224.7A CN201511024224A CN106937468A CN 106937468 A CN106937468 A CN 106937468A CN 201511024224 A CN201511024224 A CN 201511024224A CN 106937468 A CN106937468 A CN 106937468A
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- halogen lamp
- electric ballast
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
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Abstract
The invention provides a kind of electric ballast and its driving method, Metal halogen lamp system for Metal halogen lamp.The electric ballast includes driver element, for producing the high-frequency driving signal being combined by fixed frequency and around the change frequency that fixed frequency changes for Metal halogen lamp.Electric ballast use of the invention can produce fixed frequency and the driver element of the drive signal being combined around the change frequency that fixed frequency changes to be driven Metal halogen lamp, meet Metal halogen lamp starting ignition requirement and avoid Metal halogen lamp acoustic resonance phenomenon.
Description
Technical field
The present invention relates to lighting technical field, more particularly to a kind of electronics town for Metal halogen lamp
Stream device and its driving method, the Metal halogen lamp system including the electric ballast.
Background technology
Metal halide lamp (abbreviation Metal halogen lamp) have that luminous efficiency is high, color developing is good and
The features such as long lifespan, be a kind of energy-conservation new energy photochromic close to daylight, is widely used in various
Room lighting.Less than 1KHz, (100Hz is extremely generally using frequency for metal halogen lamp electric ballast
Square wave type of drive 400Hz), but the manufacturing cost of this type of drive is higher.Therefore,
Increasing metal halogen lamp electric ballast uses the high-frequency drive of lower-cost fixed frequency
Circuit, this undoubtedly can significantly promote the application of Metal halogen lamp.
However, high-frequency electronic ballast drives Metal halogen lamp to be primarily present two problems at present：First,
Method directly with resonance method starting ignition is unreliable, and reason is that resonance point has randomness,
Only under the driving of fixed frequency, resonance point is because fluorescent tube transient state pipe pressure participation resonance, and lamp
Pipe transient state pipe pressure is a uncertain changing value, is caught fire so can shift and cannot put；2nd,
The control of acoustic resonance, when frequency is more than 1KHz, easily there is low frequency driving and is not had in Metal halogen lamp
Some phenomenons, i.e. acoustic resonance phenomenon.This phenomenon shows as, and the light tube electric voltage of Metal halogen lamp is unexpected
Increase, electric discharge arc distortion, light-emitting flash, shine into when serious fluorescent tube extinguish, electric current is excessive and burn
Ruin fluorescent tube.
The content of the invention
In order to overcome drawbacks described above present in prior art, the present invention proposes one kind to be used for
The electric ballast and its driving method of Metal halogen lamp, Metal halogen lamp system, it can produce existing solid
Determine working frequency has the in good time frequency around the fixed frequency to change the height of (or being frequency sweep) again
Frequency drive signal can expire again simultaneously come the acoustic resonance phenomenon for driving Metal halogen lamp to overcome Metal halogen lamp
Sufficient resonance starts requirement of catching fire.
In order to solve the above-mentioned technical problem, the invention provides a kind of electronics town for Metal halogen lamp
Stream device, including：Driver element, for being produced by fixed frequency and around fixed frequency for Metal halogen lamp
The high-frequency driving signal that the change frequency of rate change is combined.
Preferably, the driver element includes：Main power circuit, for producing high direct voltage
Signal；IC chip, for producing the high-frequency driving signal for Metal halogen lamp；IC chip works
Power circuit, for receiving high direct voltage signal, high direct voltage signal being reduced into DC low-voltage
Signal and the d. c. voltage signal is supplied to IC chip；And peripheral protection circuit,
It is powered by the main power circuit, including VFC pulse signal produces part and lamp exception
Control signal produces part, wherein, the VFC pulse signal produces part in electricity
VFC pulse signal is produced during the normal work of sub-ballast, by the VFC pulse signal
IC chip is supplied to cause that the IC chip produces the high-frequency driving signal；And it is described
Lamp abnormal control signal produces part for producing lamp exception when electron ballast abnormality works
Protection signal.
Preferably, the VFC pulse signal is the pulse with fixed center magnitude of voltage
Signal.
Preferably, the peripheral protection circuit also includes being used in output lamp abnormal control signal
The switching circuit switched over and output VFC pulse signal between.
Preferably, the IC chip includes SEU1005B chips；The DC low-voltage signal
It is input into the vdd terminal of the SEU1005B chips；The VFC pulse signal or institute
Lamp abnormal control signal is stated to be input into the SP ends of the SEU1005B chips；And it is described in
Heart magnitude of voltage is higher than the DC low-voltage signal 0.15V to 0.5V.
Preferably, the frequency change control signal generating unit point includes first comparator, the first crystalline substance
Body pipe and the first diode；Access reference voltage, another termination in one end of the first comparator
Enter the dynamic change voltage of real-time input, the grid of output end connection the first transistor is with described
The pulse signal is exported during electric ballast normal work under the control of the switching circuit；
The positive pole of the source electrode connection diode of the first transistor, and the diode is negative
Pole connects the SP ends of the IC chip, provides it the pulse signal.
Preferably, the lamp abnormal control signal generating unit point includes the second comparator and second
Transistor；The source ground of the transistor seconds, the drain electrode connection institute of the transistor seconds
State the SP ends of IC chip；There is exception in the electric ballast in second comparator
In the case of turn on the transistor seconds under the control of the switching signal, will ground connection letter
Number the SP ends of IC chip are supplied to so that IC chip is stopped.
Preferably, the fixed frequency is in 20 to 30,40 to 60KHz frequency ranges, with
And the change frequency is in the frequency band for changing 2 to 3kHz up and down around the fixed frequency.
Present invention also offers a kind of Metal halogen lamp system, it include above-mentioned electric ballast and
The Metal halogen lamp driven by the electric ballast.
Control is driven to Metal halogen lamp using above-mentioned electric ballast present invention also offers one kind
The method of system, including：Judge that electric ballast is in abnormal conditions in normal condition；
Under normal circumstances, control switching circuit is with the output frequency conversion from peripheral protection circuit to IC chip
Control wave；And in abnormal cases, control switching circuit is with from peripheral protection circuit
Lamp abnormal protection signal is exported to IC chip.
Electric ballast and its driving method, the Metal halogen lamp for Metal halogen lamp of present invention design
System, can realize the drive of the drive signal that generation fixed frequency and transient changing frequency are combined
Dynamic circuit, i.e., on the basis of the only drive signal with fixed frequency in the prior art,
A frequency conversion around fixed frequency change is increased in drive signal, with being capable of Automatic-searching
The resonance point of the pipe pressure of Metal halogen lamp fluorescent tube, transient state pipe pressure is higher when fluorescent tube is lighted a fire, and can draw high fluorescent tube
PL (fluorescent tube and inductance) frequency of oscillation of resonance is participated in, frequency of oscillation fluorescent tube higher more easily hits
Dress fire, and inductance both end voltage can produce transient state to be mutated at resonance, i.e., and transient state is drawn
Voltage under high frequency, final high-frequency and high-voltage punctures lamp tube ends and catches fire；In addition, institute is increased
One change frequency can be with fixed frequency cooperation, Collaborative Control sound oscillation so that golden halogen
The high-voltage gas discharging light of this change of lamp " impermanence " can completely observe preferable gas discharge
VA characteristic curve, so as to realize required disposable start during high-frequency drive Metal halogen lamp
The requirement caught fire and the acoustic resonance phenomenon for overcoming generation during this such that it is able to make by the electronics
The Metal halogen lamp of ballast driven has good startup effect, and acoustic resonance phenomenon is inhibited well
Generation.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, below in conjunction with the accompanying drawings will be to this hair
Bright preferred embodiment is described, wherein：
Fig. 1 is the driving of according to embodiments of the present invention 1 electric ballast for Metal halogen lamp
The theory diagram of unit；
Fig. 2 is the principle of the peripheral protection circuit of according to embodiments of the present invention 1 driver element
Block diagram；
Fig. 3 a are the peripheries of according to embodiments of the present invention 2 electric ballast for Metal halogen lamp
The circuit theory diagrams of protection circuit；
Fig. 3 b be according to embodiments of the present invention 2 electric ballast for Metal halogen lamp with it is outer
Enclose the circuit theory diagrams of the core drive circuit of protection circuit cooperation；And
Fig. 4 is the driving of according to embodiments of the present invention 3 electric ballast for Metal halogen lamp
The flow chart of method.
Specific embodiment
Hereinafter, by preferred embodiments of the present invention will be described in detail with reference to the annexed drawings.
It is direct that the present invention mainly occurs when driving Metal halogen lamp for current high-frequency electronic ballast
It is unreliable with resonance method starting ignition and be easy to the problem for acoustic resonance phenomenon occur, it is proposed that
There is (such as ± 2 to 3kHz) by a small margin to change with by fixed frequency and around fixed frequency
The high-frequency electronic ballast that the drive signal that frequency conversion is combined is driven to Metal halogen lamp.Due to this
The presence and effect of frequency conversion, on the one hand, disclosure satisfy that resonance starts, i.e., disposable start are each
Electric arc tube can start and catch fire, because the presence of the frequency conversion for changing by a small margin can compensate for
Typically result in the unsuccessful resonance point skew of startup；On the other hand, golden halogen can well be suppressed
Lamp electric arc tube their entire life sound oscillation because having around fixed frequency small size
The frequency conversion for spending change can be effectively prevented from so that the frequency in fluorescent tube reaches the frequency of acoustic resonance.
Electric ballast for Metal halogen lamp of the invention include driver element, for for
Metal halogen lamp produces the height being combined by fixed frequency and around the change frequency that fixed frequency changes
Frequency drive signal.
Fig. 1 shows according to embodiments of the present invention 1 electric ballast for Metal halogen lamp
The theory diagram of driver element.As shown in figure 1, the driving of electric ballast of the invention
Unit mainly includes main power circuit 1, IC chip working power circuit 2, peripheral protection circuit
3rd, IC chip 4 and load circuit 8, wherein load circuit 8 include halogen electric arc tube.
Main power circuit 1 is used to provide high direct voltage signal for whole electric ballast, such as schemes
Shown in 3b, it can for example be adjusted by bridge rectifier, DC filtering circuit, power factor
Whole circuit and Electro Magnetic Compatibility (EMC), suppress impacting with high pressure and high current surge, different
Often the circuit such as insurance is constituted, and the external civil power of main power circuit 1 is input into 220VAC by whole
After the treatment such as stream, filtering, the high direct voltage signal of output 310VDC or so.
IC chip working power circuit 2 is used to receive the high direct voltage of the output of main power circuit 1
Signal, and by the high direct voltage signal reduction DC low-voltage signal that most IC chip 4 works,
As shown in Figure 3 b, it can be for example made up of step-down, low-voltage filter, high-pressure side pressure limiting circuit,
In other words, its effect is such as 1 to the 2W fixed carbon resisters by the larger resistance of dissipated power
(such as resistance R401, the 200k Ω/1W shown in Fig. 3) is high with the direct current of main power circuit 1
The output end connection of signal is pressed, high direct voltage signal is directly reduced the direct current of most chip operation
Low-voltage signal, and for example, by 13V voltage-stabiliser tube highest low pressure be limited in 13VDC with
It is interior, and design the vdd terminal that debugging is conveyed to chip IC when civil power is input into 220VAC
Vdd voltage for 7.5VDC or so.
IC chip 4 is the core devices of electric ballast, and it is used for bearing for such as Metal halogen lamp
Carry and produce drive signal, as shown in Figure 3 b, it mainly can (southeast be big by SEU1005B
The light source application-specific integrated circuit of design is learned, its rated operational voltage is 6 to 18VDC, is traditionally arranged to be
12VDC) constituted with SEU1001 chips and its peripheral circuit, be mainly used in realizing vibration electricity
Road, pre- heater circuit, delay circuit, frequency dividing circuit, the comparing for Power Factor Correction Control
The function of the module such as device and hysteresis comparator circuit, drive circuit, wherein oscillating circuit for example by
The oscillating circuit constituted based on the IC oscillator modules of SEU1005B, its frequency of oscillation can be with
Determined by the time constant of outer meeting resistance R601, C602 as shown in Figure 3, but on condition that core
The voltage Vdd of the pin 7 of piece SEU1005B is constant, and such as the present invention is in civil power 220VAC
In the case of to design its voltage Vdd be 7.5VDC, in civil power 198VAC to 253VAC changes
Range intervals voltage Vdd is interval in 6.6 to 8.9VDC, this voltage Vdd constant intervals it
Interior, the fixed working frequency of the oscillating circuit can up and down fluctuate 1 to 1.3KHz around centre frequency；
I.e. the present invention is 29.5KHz in civil power 220VAC design centres frequency of oscillation, in civil power
198VAC to 253VAC excursions interval in oscillatory work frequency for 28.2 to
30.7KHz.IC drive circuits are as shown in Figure 3 b for example by drive circuit mould that IC chip is built-in
Block SEU1001 is constituted, input termination oscillating circuit, the oscillator signal that oscillating circuit is produced
Drive signal is converted to, by external component and a pair of MOS effects of on-off circuit 7
Inductive switch pipe grid G connection, in turn export SEU1001 chips high-end Ho and
The square-wave signal of the low side Lo of SEU1005B so that MOS effect for on-off circuit 7
Inductive switch pipe is turned on and another MOS field effect transistor switches pipe ends, and when being designed with dead band
Between, it is to avoid two MOS field effect transistor switches pipes are switched on simultaneously.
As described above, on-off circuit 7 for example includes a pair of MOS field effect transistor switch pipes, except this
In addition, as shown in Figure 3 b, on-off circuit 7 also includes peripheral component, on-off circuit 7
Input is connected with the drive circuit of IC chip 4, and output end is electric with the load of such as Metal halogen lamp
Road connects；DC/AC translation functions are mainly performed, i.e., high direct voltage signal is converted to height
Frequency high-voltage AC signal starts Metal halogen lamp.
As shown in Figure 3 b, load circuit 8 is gone back in addition to including wanting powered Metal halogen lamp
Can be including choke induction, resonant capacitance, capacitance etc., it is mainly used in undertaking Metal halogen lamp
The resonant ignition of electric arc tube, normal burning-point function.
Above-mentioned each module or circuit belong to prior art category, and these modules or circuit are constituted
Electric ballast to fix working frequency high-frequency drive Metal halogen lamp of the prior art, it is this
Cause that acoustic resonance phenomenon easily occurs in Metal halogen lamp in the method for fixed frequency high-frequency drive Metal halogen lamp,
And it is difficult to ensure that start shooting to start every time catch fire.
In order to the startup for meeting Metal halogen lamp is caught fire requirement and the acoustic resonance phenomenon that overcomes Metal halogen lamp,
The present invention proposes to fix working frequency and the in good time change around fixed working frequency change
The high-frequency driving signal that frequency is combined carries out the electric ballast of high-frequency drive to Metal halogen lamp.Also
It is to say, on the basis of fixed frequency, introduce one has by a small margin the present invention around fixed frequency
On the one hand the change frequency of change, the drive signal that both frequencies are combined disclosure satisfy that resonance
Start, i.e., each electric arc tube of disposably starting shooting can start and catch fire because can not start
The main cause of work(is that resonance point can usually offset, and resonance potential does not reach puncture electric arc pipe electrode
The peak value at two ends, and use has a drive signal for quick change frequency around centre frequency,
Can carry out frequency sweep to ensure that circuit resonance point falls in voltage peak point or so during start every time, it is full
Foot is started shooting to start and is caught fire every time, and on the other hand can also suppress acoustic resonance phenomenon.
In order to realize above-mentioned purpose of the invention, the present invention is driving on the basis of existing technology
A peripheral protection circuit 3 is increased inside moving cell, it is powered by main power circuit 1, such as
Shown in Fig. 2, peripheral protection circuit 3 mainly includes that VFC pulse signal produces part 31
Part 32 is produced with lamp abnormal control signal, wherein the VFC pulse signal generating unit
Dividing 31 is used to produce VFC pulse signal in electric ballast normal work, becomes this
Frequency control wave is supplied to IC chip 4 with so that the IC chip 4 produces the high frequency
Drive signal；And the lamp abnormal control signal produces part 32 in electric ballast
Lamp abnormal protection signal is produced during abnormal work, wherein the high-frequency driving signal is fixed frequency
The high-frequency driving signal being combined with the change frequency changed around fixed frequency.
Preferably, the VFC pulse signal is the pulse with fixed center magnitude of voltage
Signal.
As shown in Fig. 2 the peripheral protection circuit 3 also includes being used for being controlled extremely in output lamp
The switching circuit switched between signal processed and output VFC pulse signal.
According to one embodiment of present invention, as shown in Figure 3 a, peripheral protection circuit 3 is for example
Can be compared by signal input, signal, the circuit such as signal output is constituted, the purpose is in electronics
Under IC chip 4 from ballast circuit normal operation to such as SEU1005B pin 1
SP ends be input into one have specific center voltage value pulse signal, for as load
Metal halogen lamp be driven control；And in the case of circuit of electronic ballast abnormal work to
The SP ends of the pin 1 of IC chip 4 are input into a lamp abnormal control signal, for whole electricity
Protected sub-ballast.
In the present invention, part is produced by the VFC pulse signal of peripheral protection circuit 3
The vdd terminal of 31 pulse signals with center voltage value for producing and the pin 7 of IC chip
The DC low-voltage signal that is input into coordinates, can for the load of such as Metal halogen lamp etc provide including
Fixed frequency and there is the drive signal of the change frequency for changing by a small margin around the fixed frequency, with
The startup for meeting Metal halogen lamp is caught fire and requirement and avoids acoustic resonance phenomenon.
As an example of the present invention, such as shown in Fig. 3 a, the of peripheral protection circuit 3
One signal output part SP1 and secondary signal output end SP2 output two paths of signals, is all the way lamp
Abnormal protection signal output part SP2, is all the way VFC pulse voltage signal output end SP1,
And it is used to access the SP ends of IC chip 4.As shown in Figure 3 a, peripheral protection circuit 3
Mainly include two comparators, first comparator Com1 and the second comparator Com2, and two
Individual field effect transistor M 1 and M2.The output end control field-effect of first comparator Com1
The grid G of transistor M1, due to the grid G of field effect transistor M 1 control signal with
And the DC low-voltage signal VDC of drain D access is raised and lowered by line voltage and is caused
The magnitude of voltage of first comparator Com1 output ends and the drain D of field effect transistor M 1 are accessed
Following by inputting voltages be raised and lowered, cause in the PN junction raceway groove of field effect transistor M 1
Resistance is reduced or increased, the source S output voltage of field effect transistor M 1 necessarily follow raising or
Reduce, and because the normal phase input end of first comparator Com1 accesses reference voltage, and bear
Phase input accesses the real-time dynamic electric voltage the being raised and lowered change of such as line voltage, and institute is defeated
Signal after the comparing for going out is a pulse signal, therefore, the source electrode of field effect transistor M 1
S supplies the SP of IC chip 4 by high speed diode Vd1 (can be FR107 models)
End is one has the pulse signal of fixed center magnitude of voltage.It is described solid for example shown in Fig. 3 a
Center magnitude of voltage resistance R100 as shown in Figure 3 size determine.
Preferably, the fixed center magnitude of voltage of the pulse signal can be designed as comparing IC chip
The Vdd voltage of 4 operating voltages 0.15V to 0.5VDC high all the time；Because this is higher than IC chip
The Vdd voltage pulse signal of 0.15V to 0.5VDC high all the time real-time presence, with IC
The Vdd voltage of chip 4 is because being raised and lowered for line voltage collectively forms consolidating in design
Determine to have on the basis of frequency a change around fixed frequency (such as ± 2 to 3KHz) by a small margin
Change, the situation corresponds to circuit normal condition；In the case of circuit abnormality, such as Fig. 3 a institutes
Show, the second comparator Com2 exports high-potential voltage to the second field effect transistor M 2, makes
The drain electrode for obtaining the second field effect transistor M 2 is fully on source electrode, the second output end SP2
Ground connection, so that the SP ends ground connection of IC chip 4, SP terminal voltages are 0 or negative situation
Lower IC chip 4 is stopped, and whole circuit is protected.
Preferably, as shown in Figure 3 b, when IC chip 4 is SEU1005B, Ke Yixuan
With LM339M as peripheral protection circuit 3 first comparator Com1 and the second comparator
Com2.Now, the output end of first comparator Com1 controls field-effect transistor M1's
Grid G, the source S of field effect transistor M 1 is by high speed diode Vd1 (such as FR107)
The SP ends for supplying IC chip 4 are a pulse signals, and its center voltage signal value can set
It is calculated as the Vdd voltage 0.5VDC high all the time than IC chip 4；Because this is consistently higher than IC
The real-time presence of the 0.5VDC pulse signals of the Vdd of chip 4, the Vdd with IC chip 4
Voltage is because being raised and lowered for line voltage is collectively formed on the basis of the fixed frequency for designing
On have a change frequency around fixed frequency (as ± 2 to 3KHz) by a small margin, Ji Ru cities
There is fast-changing such as ± 2 a to 3KHz around fixed frequency 29.5KHz during electric 220VAC
The frequency of scope cannot change the stable frequency range of fixed frequency in bounce.
For the embodiment shown in Fig. 3 a, exported by the output end SP1 of peripheral protection circuit 3
The center voltage value of the pulse signal with center voltage value wrapped by peripheral protection circuit 3
The resistance of the resistance R100 for including is determined, and is input into the Vdd of the pin 7 of IC chip 4
By the resistance R401 in IC chip working power circuit 2, (its size can be magnitude of voltage
200k Ω/1W) determine.Preferably, center voltage value is selected as 0.15V higher than Vdd voltage value
To 0.5V, and SEU1005B is in this case, it will produce one around fixed center
Frequency quickly changes the change frequency of 2 to 3kHz up and down.
Do not including peripheral protection circuit 3 in the prior art, core different from shown in Fig. 3 b
The SP ports of the pin 1 of piece SEU1005B not with the output end SP1 of peripheral protection circuit 3
Or output end SP2 connections (that is, VFC pulse voltage signal are not accessed or lamp are different
Normal protection signal), but Vdd voltage is equally accessed with the vdd terminal mouthful of pin 8, it is existing
The chip SEU1005B for having so connection in technology will have for the load of such as Metal halogen lamp is produced
There is the high-frequency driving signal of the fixed center frequency of such as 29.5kHz, it is this that only there is fixation
The high-frequency driving signal of centre frequency cannot generally meet Metal halogen lamp startup catch fire requirement and
Easily cause the acoustic resonance phenomenon of Metal halogen lamp.
And the present invention is on the basis of existing technology so that the pin 1 of chip SEU1005B
SP terminate into a pulse signal with fixed center magnitude of voltage, and the fixed center is electric
The Vdd voltage of the vdd terminal mouthful of pin 8 of the pressure value than chip SEU1005B will be higher by all the time
0.5VDC, such access way will cause that chip SEU1005B is the negative of such as Metal halogen lamp
Carry produce one by fixed center frequency (for example, 29.5kHz) and around the fixed center frequently
The high-frequency driving signal that the frequency conversion (for example, ± 2 to 3kHz) that rate has minor variations is combined,
Started with the high frequency for meeting the load of such as Metal halogen lamp and catch fire requirement and avoid Metal halogen lamp acoustic resonance
The generation of phenomenon.
Elaborate inventive concept of the invention (that is, with by fixed frequency and enclosing with above-mentioned example
Gold is driven around the fixed frequency high-frequency driving signal that fast-changing frequency conversion is combined up and down
Halogen lamp), but the invention is not restricted to the example shown in above-mentioned Fig. 3 a and Fig. 3 b, i.e. it is any
The electric ballast that this high-frequency driving signal can be provided should all belong to invention of the invention
Design；On the other hand, for as shown in figure 3b using chip SEU1005B as core
For the electric ballast of driving chip, as long as wherein to the SP ports of chip SEU1005B
Input one has pulse signal, fixed center magnitude of voltage ratio of fixed center magnitude of voltage
The Vdd voltage of vdd terminal mouthful is higher by 0.5VDC all the time, using chip SEU1005B as core
The electric ballast of heart driving chip just can provide one by solid for the load of such as Metal halogen lamp
Determine frequency and around the fixed frequency high-frequency drive letter that fast-changing frequency conversion is combined up and down
Number drive Metal halogen lamp；Further, peripheral protection circuit 3 of the invention can provide change
Can also include that the lamp for providing lamp abnormal protection signal is protected extremely on the basis of frequency control wave
Shield signal generator point, IC chip cannot be given with electric ballast in the case of normal work
4 provide a lamp abnormal protection signal, to cause that whole electric ballast cannot work so as to reach
To the purpose of protection electric ballast.Under normal circumstances, the circuit in electric ballast occurs different
In the case of often, circuit voltage is raised, and causes the comparison signal of original setting to change, and circuit is just
Start abnormal protection system, after startup as the electrochemical capacitor in circuit (such as shown in Fig. 3
Capacitor C2) electric discharge, circuit automatic secondary starts usually after a few minutes or more than ten minutes,
Can not normally start and enter secondary cycle；That is, as shown in Fig. 2 except above-mentioned
VFC pulse signal produce part 31 and lamp abnormal control signal to produce part 32 for,
Peripheral protection circuit 3 can also include being used to enabling VFC pulse signal generation part
31 work and enable lamp abnormal control signal produce the switching that part 32 switches between working
Circuit 33, to export VFC pulse signal in electric ballast normal work, and
Circuit voltage raise cause electric ballast cannot normal work when output lamp exception control believe
Number, the switching circuit 33 can for example include electrolytic capacitor C2 as shown in Figure 3 a, lead to
Cross the charging and discharging of electrolytic capacitor C2, collaboration by the output of first comparator Com1 come
The conducting and cut-off of the field effect transistor M 1 that control coordinates with it, and compare by second
The output of device Com2 controls the conducting and cut-off of field effect transistor M 2 that coordinate with it,
To realize the function of the switching circuit of peripheral protection circuit 3, switching circuit of the invention is not limited to
Structure shown in Fig. 3 a, it is any in the prior art to realize to output VFC pulse letter
Number and the output switching circuit that switches over of lamp abnormal control signal should all belong to of the invention
Protection domain.
The driving method that fixed frequency proposed by the present invention is combined with frequency conversion can be controlled well
The starting ignition of Metal halogen lamp and lamp covibration can be avoided.Preferably, at fixed center
Frequency is in when in 20 to 30,40 to 60KHz frequency ranges, and frequency conversion is preferably 2 to 3KHz
Frequency band, such as 28.5 to 30.5KHz, centre frequency falls in 29.5KHz；Or 20 to
23KHz, centre frequency falls in 21KHz, and these are all very good control frequency ranges.
Carried out present invention also offers including above-mentioned electric ballast and by above-mentioned electric ballast
The Metal halogen lamp system of the Metal halogen lamp of drive control.
Control is driven to Metal halogen lamp using above-mentioned electric ballast present invention also offers one kind
The method of system, as shown in figure 4, including：Judge that electric ballast is still located in normal condition
In abnormal conditions；Under normal circumstances, control switching circuit is with from peripheral protection circuit to IC
Chip exports VFC pulse signal；And in abnormal cases, control switching circuit with from
Peripheral protection circuit exports lamp abnormal protection signal to IC chip.
As described above, the electric ballast of present invention design and its driving method, Metal halogen lamp system
System, can realize the drive circuit that fixed frequency and transient changing frequency are combined, i.e., in fixation
On the basis of frequency, increase a change frequency, to be capable of the pipe of Automatic-searching Metal halogen lamp fluorescent tube
The resonance point of pressure, transient state pipe pressure is higher when fluorescent tube is lighted a fire, and can draw high fluorescent tube and participate in resonance
PL (fluorescent tube and inductance) frequency of oscillation, frequency of oscillation fluorescent tube higher more easily punctures and catches fire, and
Inductance both end voltage can produce transient state to be mutated at resonance, i.e., transient state draws high the electricity under high frequency
Pressure, final high-frequency and high-voltage punctures lamp tube ends and catches fire；In addition, the increased change frequency of institute
Can be with fixed frequency cooperation, Collaborative Control sound oscillation so that this change " nothing of Metal halogen lamp
High-voltage gas discharging light often " observes the VA characteristic curve of preferable gas discharge completely, from
And realize problem and overcome that required disposable start during high-frequency drive Metal halogen lamp catches fire
The acoustic resonance phenomenon produced during this such that it is able to make the golden halogen driven by the electric ballast
Light fixture has good startup effect, and the generation of acoustic resonance phenomenon is inhibited well.
It is understood that above specific embodiment is only exemplary implementation of the invention
Example, but the invention is not limited in this.For those skilled in the art,
In the case where spirit and substance of the present invention are not departed from, all variations and modifications can be made, these changes
Type and improvement will be regarded as protection scope of the present invention.
Claims (10)
1. a kind of electric ballast for Metal halogen lamp, including：
Driver element, for for Metal halogen lamp is produced by fixed frequency and is changed around fixed frequency
The high-frequency driving signal that is combined of change frequency.
2. electric ballast according to claim 1, wherein the driver element includes：
Main power circuit (1), for producing high direct voltage signal；
IC chip (4), for producing the high-frequency driving signal for Metal halogen lamp；
IC chip working power circuit (2), for receiving high direct voltage signal, direct current is high
Pressure signal is reduced to DC low-voltage signal and the d. c. voltage signal is supplied into IC chip
(4)；And
Peripheral protection circuit (3), it is powered by the main power circuit (1), including is become
Frequency control wave produces part (31) and lamp abnormal control signal to produce part (32),
Wherein, the VFC pulse signal produces part (31) in electronic ballast
VFC pulse signal is produced during device normal work, the VFC pulse signal is supplied to
IC chip (4) is with so that the IC chip (4) produces the high-frequency driving signal；And
The lamp abnormal control signal produces part (32) in electron ballast abnormality work
Lamp abnormal protection signal is produced when making.
3. electric ballast according to claim 2, wherein
The VFC pulse signal is the pulse signal with fixed center magnitude of voltage.
4. electric ballast according to claim 3, wherein,
The peripheral protection circuit (3) also includes being used in output lamp abnormal control signal and defeated
Go out the switching circuit (33) switched between VFC pulse signal.
5. electric ballast according to claim 4, wherein,
The IC chip (4) includes SEU1005B chips；
The DC low-voltage signal is input into the vdd terminal of the SEU1005B chips；
The VFC pulse signal or the lamp abnormal control signal are input into described
The SP ends of SEU1005B chips；And
The center voltage value is higher than the DC low-voltage signal 0.15 to 0.5V.
6. electric ballast according to claim 5, wherein
The frequency change control signal generating unit point includes first comparator, the first transistor and the
One diode；
Reference voltage is accessed in one end of the first comparator, and the other end accesses dynamic in real time and becomes
Change voltage, the grid of output end connection the first transistor is with the electric ballast normal work
When the pulse signal is exported under the control of the switching circuit；
The source electrode of the first transistor connects the positive pole of the diode, and two pole
The negative pole of pipe connects the SP ends of the IC chip, provides it the pulse signal.
7. electric ballast according to claim 6, wherein,
The lamp abnormal control signal generating unit point includes the second comparator and transistor seconds；
The source ground of the transistor seconds, the drain electrode connection of the transistor seconds is described
The SP ends of IC chip；
Second comparator is cut in the case where exception occurs in the electric ballast described
Turn on the transistor seconds under the control for changing signal, ground signalling is supplied to IC cores
The SP ends of piece are so that IC chip is stopped.
8. electric ballast according to claim 7, wherein,
The fixed frequency is in 20 to 30,40 to 60KHz frequency ranges, and the change
Change frequency and be in the frequency band for changing 2 to 3kHz up and down around the fixed frequency.
9. a kind of Metal halogen lamp system, it is included according to any one institute in claim 1 to 8
The electric ballast stated and the Metal halogen lamp driven by the electric ballast.
10. the electric ballast in a kind of utilization claim 4 to 8 described in any one is to gold
The method that halogen lamp is driven control, including：
Judge that electric ballast is in abnormal conditions in normal condition；
Under normal circumstances, control switching circuit is exported with from peripheral protection circuit to IC chip
VFC pulse signal；And
In abnormal cases, control switching circuit is exported with from peripheral protection circuit to IC chip
Lamp abnormal protection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024224.7A CN106937468A (en) | 2015-12-30 | 2015-12-30 | Electric ballast and its driving method, Metal halogen lamp system for Metal halogen lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024224.7A CN106937468A (en) | 2015-12-30 | 2015-12-30 | Electric ballast and its driving method, Metal halogen lamp system for Metal halogen lamp |
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| CN106937468A true CN106937468A (en) | 2017-07-07 |
Family
ID=59441959
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511024224.7A Pending CN106937468A (en) | 2015-12-30 | 2015-12-30 | Electric ballast and its driving method, Metal halogen lamp system for Metal halogen lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109936888A (en) * | 2017-12-15 | 2019-06-25 | 松下知识产权经营株式会社 | High frequency drive circuit and the lighting device for using the high frequency drive circuit |
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| US20090302775A1 (en) * | 2008-06-10 | 2009-12-10 | Osram Sylvania Inc. | Multi-lamps instant start electronic ballast |
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Application publication date: 20170707 |