CN103826375A - Electronic stabilizer provided with function of instantly improving current peak factor - Google Patents
Electronic stabilizer provided with function of instantly improving current peak factor Download PDFInfo
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- CN103826375A CN103826375A CN201210462385.4A CN201210462385A CN103826375A CN 103826375 A CN103826375 A CN 103826375A CN 201210462385 A CN201210462385 A CN 201210462385A CN 103826375 A CN103826375 A CN 103826375A
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Abstract
The invention discloses an electronic stabilizer provided with a function of instantly improving a current peak factor. The electronic stabilizer comprise a conversion circuit, a commutation circuit, a control unit and a current peak factor improvement circuit, wherein the conversion circuit is used for supplying DC voltages; the commutation circuit is connected with the conversion circuit for converting the DC voltages into AC voltages so as to drive a gas discharge lamp; the control unit is connected with the conversion circuit and multiple switch elements of the commutation circuit for outputting a first control signal to control the operation of the conversion circuit and outputting a second control signal and a third control signal which have inverted states so as to control the corresponding switch elements to perform conduction or cut-off switching, and a dead zone time exists between the second control signal and the third control signal; and the current peak factor improvement circuit is connected with the control unit for generating an inhibition signal to the control unit through the triggering of the dead zone time so as to enable the control unit to correspondingly adjust the first control signal and control the conversion circuit to reduce an output value to a preset value or temporarily stop operation.
Description
Technical field
This case is about a kind of electric stabilizer, and espespecially a kind of tool improves the electric stabilizer of current spike factor function immediately.
Background technology
Gaseous discharge lamp is owing to having the features such as luminosity is strong, the life-span is long, volume is little, optical efficiency is high, color rendering is good, therefore be widely used in the lighting apparatus such as various open airs, indoor or automobile, and gaseous discharge lamp more needs to arrange in pairs or groups, an electric stabilizer (ballast) uses, to be output in the alternating current of gaseous discharge lamp by electric stabilizer control.
Existing electric stabilizer at least comprises a change-over circuit (converter) and a commutation circuit (inverter), wherein change-over circuit is changed received direct voltage by the control of certain power control circuit, with the direct voltage of output varying level, and determine power control circuit and more detect direct voltage and the direct current that change-over circuit is exported, to be output as and to determine power according to testing result control change-over circuit, be full-bridge type commutation circuit as for commutation circuit, it has upper brachium pontis and lower brachium pontis with parallel way connection and each self-contained two switch elements, two switch elements that on this, brachium pontis and this lower brachium pontis have are staggered switchings of synchronously carrying out conducting or cut-off by the control of a commutation control circuit, make commutation circuit direct voltage and the direct current of change-over circuit output can be converted to alternating voltage and alternating current.
In above-mentioned framework, for fear of two switch elements separately in upper brachium pontis and lower brachium pontis in the moment of switching, the situation that conducting simultaneously occurs and cause switch element to damage, commutation control circuit is on controlling when the switch element start in brachium pontis and lower brachium pontis, first control original cut-off of the switch element for conducting in upper brachium pontis and lower brachium pontis, control again original switch element conducting for cut-off in upper brachium pontis and lower brachium pontis, therefore go up brachium pontis and lower brachium pontis two switch elements separately and there is a period of time of cut-off simultaneously, also be called Dead Time (Dead-Time), the alternating voltage of exporting as for commutation circuit will be via temporarily booster tension level significantly of a high pressure spot circuit for lamp, required electric energy when providing gaseous discharge lamp to start, and gaseous discharge lamp continues shinny by the electric energy by this alternating current.
Because electric stabilizer output AC electric current carrys out the start of supplied gas discharge lamp, the therefore current spike factor of this alternating current (Current Crest Factor; CCF) quality will directly affect the life-span of gaseous discharge lamp.Refer to Fig. 1, the oscillogram of the lamp current of its gaseous discharge lamp driving for existing electric stabilizer.As shown in Figure 1, the alternating current of exporting when existing electric stabilizer is during in commutation, due to commutation moment, change-over circuit still continues running and provides rated power to commutation circuit, but now two switch elements in two switch elements and the lower brachium pontis in the upper brachium pontis of commutation circuit will be all cut-off state because of Dead Time, make commutation circuit be output as off state, therefore the electric energy that change-over circuit is exported only can be stored in the output capacitance in change-over circuit, thus, after the alternating current commutation that electric stabilizer is exported completes, the predetermined power that change-over circuit is exported will be exported to gaseous discharge lamp with the electric energy being stored in output capacitance simultaneously, the high electric energy of now moment output will make lamp current on gaseous discharge lamp that current spike occur when the commutation, that is as shown in Figure 1, and also there is due to voltage spikes in modulating voltage on gaseous discharge lamp, thus, the lost of life that reduces current spike factor by causing and make gaseous discharge lamp.
Although the existing electric stabilizer of part increases by a testing circuit, whether the electric current of being exported with detection change-over circuit produces fluctuation, when the electric current of exporting when change-over circuit by this produces fluctuation, testing circuit is just exported corresponding signal and is ordered about change-over circuit reduction output, to suppress the generation of current spike, but due to after this current spike suppressor mode is the alternating current generation current spike of exporting in electric stabilizer, the just passive inhibition of carrying out current spike, that is, this existing current spike suppressor mode is that the current spike of the alternating current exported using electric stabilizer is as triggering foundation, therefore also cannot suppress the generation of current spike completely, its effect that suppresses current spike is also quite limited, in addition, whether this testing circuit must produce fluctuation by detecting and judge the electric current that change-over circuit exports, therefore operation method is comparatively complicated, circuit cost is also higher.
Therefore, how to develop a kind of tool that improves above-mentioned prior art disappearance and immediately improve the electric stabilizer of current spike factor function, real is the current problem in the urgent need to address of correlative technology field technical staff.
Summary of the invention
The main purpose of this case is to provide a kind of tool immediately to improve the electric stabilizer of current spike factor function, it is improved circuit and is captured the Dead Time of the control signal of controlling the multiple switch element starts in commutation circuit by current spike factor, so that at this Dead Time and the moment of the alternating current commutation that electric stabilizer is exported notifies control unit, making control unit control accordingly change-over circuit immediately reduces power to one fixed value of output or suspends running, suppress on one's own initiative by this generation of current spike, only can be after current spike occurs to solve existing electric stabilizer, just carry out passively the inhibition of current spike, therefore suppress the poor effect of current spike, and circuit structure and operation method are comparatively complicated, cause the more high disappearance of production cost.
For reaching above-mentioned purpose, the preferred embodiments of this case, for a kind of electric stabilizer is provided, comprises: change-over circuit, in order to direct voltage to be provided; Commutation circuit, is connected with change-over circuit, in order to direct voltage is converted to ac output voltage, to drive at least one gaseous discharge lamp by the electric energy of ac output voltage, and has multiple switch elements; Control unit, be connected with the control end of change-over circuit and multiple switch elements, control unit is exported the first control signal to control change-over circuit, and contrary the second control signal and the 3rd control signal of output state, to control, corresponding switch element carries out conducting or cut-off is switched, and wherein between the second control signal and the 3rd control signal, has the Dead Time that multiple switch elements are ended simultaneously; And current spike factor improves circuit, connection control unit also receives the second control signal and the 3rd control signal, with the triggering for generating Inhibitory signal by Dead Time to control unit, make control unit should adjust the first control signal of output, power to the preset value or time-out that immediately reduces output to order about change-over circuit operates.
For reaching above-mentioned purpose, the preferred embodiments of this case separately provides a kind of electric stabilizer, comprises: change-over circuit, in order to direct voltage to be provided; Commutation circuit, is connected with change-over circuit, in order to direct voltage is converted to ac output voltage, to drive at least one gaseous discharge lamp by the electric energy of ac output voltage; And control unit, be connected with the control end of change-over circuit and multiple switch elements, control unit is exported the first control signal to control change-over circuit, and contrary the second control signal and the 3rd control signal of output state, to control, corresponding switch element carries out conducting or cut-off is switched, and wherein between the second control signal and the 3rd control signal, has the Dead Time that multiple switch elements are ended simultaneously; Wherein control unit changes corresponding to first control signal of controlling of Dead Time, and power to the preset value or time-out that immediately reduces output to order about change-over circuit operates.
Accompanying drawing explanation
Fig. 1: the oscillogram of the lamp current of its gaseous discharge lamp driving for existing electric stabilizer.
Fig. 2: the circuit box schematic diagram of its electric stabilizer that is this case preferred embodiment.
Fig. 3: it is the particular circuit configurations schematic diagram of the electric stabilizer shown in Fig. 2.
Fig. 4: it is the oscillogram of the second control signal shown in Fig. 3 and the 3rd control signal.
Fig. 5: the oscillogram of the lamp current of the gaseous discharge lamp that its electric stabilizer that is this case drives.
Fig. 6: the circuit box schematic diagram of its electric stabilizer that is another preferred embodiment of this case.
Wherein, description of reference numerals is as follows:
1,6: electric stabilizer
10: input filter and rectification circuit
11: circuit of power factor correction
12: change-over circuit
13: commutation circuit
14: high pressure spot circuit for lamp
15,60: control unit
150: determine power control circuit
151: commutation control circuit
16: current spike factor improves circuit
160: Dead Time acquisition circuit
160a: AND circuit
161: power suppresses circuit
9: alternating current input power supplying
8: gaseous discharge lamp
V
in: AC-input voltage
V
s1: full-wave direct current voltage
V
s2: high-voltage dc voltage
V
d: decompression DC voltage
V
out: ac output voltage
V
r: Inhibitory signal
V
t: triggering signal
V
i: external voltage
M
1~ M
4: the first ~ four switch element
S
1~ S
3: the first ~ three control signal
I
d: working direct current electric current
I--c: lamp current
T
d: Dead Time
D
1: the first diode
D
2: the second diode
C
1~ C
2: the first～the second electric capacity
R
1～R
6: the first ~ six resistance
B
1: PNP bipolar junction transistor
B
2: NPN bipolar junction transistor
A: first is total to contact
B: second is total to contact
G: earth terminal
Embodiment
Some exemplary embodiments that embody this case feature & benefits will describe in detail in the explanation of back segment.Be understood that this case can have various variations in different modes, it neither departs from the scope of this case, and explanation wherein and be shown in the use that ought explain in essence, but not in order to limit this case.
Refer to Fig. 2 and 3, wherein Fig. 2 is the circuit box schematic diagram of the electric stabilizer of this case preferred embodiment, and Fig. 3 is the particular circuit configurations schematic diagram of the electric stabilizer shown in Fig. 2.As shown in Fig. 2 and 3, the electric stabilizer 1 of this case and an alternating current input power supplying 9, for example civil power, and at least one gaseous discharge lamp 8 connects, electric stabilizer 1 receives the AC-input voltage V that this alternating current input power supplying 9 provides
in, and by AC-input voltage V
inrequired electric energy when providing gaseous discharge lamp 8 light a lamp and operate is provided.Electric stabilizer 1 comprises input filter and rectification circuit 10, circuit of power factor correction 11, change-over circuit 12, commutation circuit 13, high pressure spot circuit for lamp 14, control unit 15 and current spike factor improve circuit 16.
Input filter and rectification circuit 10 are connected in the input of electric stabilizer 1, and are connected with alternating current input power supplying 9, in order to the high-frequency noise of electric stabilizer 1 own and the AC-input voltage V providing from alternating current input power supplying 9 to be provided
inexternal noise, produce with the situation of avoiding interactive interference, and by AC-input voltage V
incarry out rectification, to export full-wave direct current voltage V
s1.Circuit of power factor correction 11 is connected with input filter and rectification circuit 10, and be the circuit framework of booster circuit, circuit of power factor correction 11 makes the CURRENT DISTRIBUTION of the input current (not shown) that electric stabilizer 1 input receives and envelope curve (envelope curve) similar in appearance to AC-input voltage V in order to the switching of the switch element by inner
inwaveform, to improve power factor, and by full-wave direct current voltage V
s1boost as high-voltage dc voltage V
s2.
Change-over circuit 12 as shown in Figure 3, is decompression converting circuit, and is connected with circuit of power factor correction 11 and control unit 15, and has a switch element, its switching by control unit 15 control switch elements and by high-voltage dc voltage V
s2step-down is decompression DC voltage V
d.Certainly, in above-described embodiment, change-over circuit 12 is not limited to the circuit framework that is illustrated in figure 3 decompression converting circuit, as long as be the circuit framework of step-down form, change-over circuit etc. is isolated in such as buck-boost change-over circuit or step-down, all can be formed in the change-over circuit 12 of this case.
High pressure spot circuit for lamp 14 is connected between commutation circuit 13 and gaseous discharge lamp 18, and it can be temporary by ac output voltage V
outvoltage level promote, be for example promoted to 3 ~ 5KV, luminous with gas discharge lamp 18.Certainly, in some embodiment, commutation circuit 13 also can only comprise two switch elements and form half-bridge circuit (not shown).
Refer to Fig. 4, and coordinate Fig. 2 and 3, wherein Fig. 4 is the oscillogram of the second control signal shown in Fig. 3 and the 3rd control signal.As shown in Fig. 2 ~ 4, the first ~ four switch element M of commutation control circuit 151 and commutation circuit 13
1~ M
4control end connect, it is output as the second control signal S of pulse width modulation
2to the first switch element M
1and the 4th switch element M
4control end, to control the first switch element M
1and the 4th switch element M
4carry out identical switching action, commutation control circuit 151 is also output as the 3rd control signal S of pulse width modulation
3to second switch element M
2and the 3rd switch element M
3control end, to control second switch element M
2and the 3rd switch element M
3carry out identical switching action.
Wherein, shown in Fig. 4, commutation control circuit 151 is controlled the second control signal S
2and the 3rd control signal S
3opposite states, therefore receive the second control signal S
2the first switch element M
1and the 4th switch element M4 and receive the 3rd control signal S
3second switch element M
2and the 3rd switch element M
3carry out the switching of conducting or cut-off in the mode of interlocking, in addition, commutation control circuit 151 is more controlled the second control signal S
2and the 3rd control signal S
3between exist and be all the Dead Time T of forbidden energy (disable) level
d, make by this first ~ four switch element M
1~ M
4in this dead band time T
din time, ends simultaneously, to avoid the first switch element M
1and second switch element M
2conducting simultaneously and the 3rd switch element M
3and the 4th switch element M
4the situation of conducting simultaneously occurs, and in this dead band time T
dwhen generation, the ac output voltage V that commutation circuit 13 is exported
outin the moment of commutation.
In some embodiment, control unit 15 can be made up of composite type integrated circuit (IC), the integrated circuit that for example model is IRS2573D, this composite type integrated circuit can have the function of determining power control circuit 150 and commutation control circuit 151 simultaneously, therefore can make control unit 15 avoid providing respectively the function of determining power control circuit 150 and commutation control circuit 151 with multiple integrated circuits.
Current spike factor improves circuit 16 and is connected with commutation control circuit 151 and receives the second control signal S2 and the 3rd control signal S3, and with determine power control circuit 150 and be connected, current spike factor improves circuit 16 in order to enter Dead Time T as the second control signal S2 and the 3rd control signal S3
dtime, by Dead Time T
dtriggering and produce Inhibitory signal V
rto determining power control circuit 150, make to determine power control circuit 150 according to Inhibitory signal V
rand the corresponding first control signal S that adjusts
1, control by this instant power that reduces output of change-over circuit 12 to preset value, for example reduce the power to 50% of output, or suspend running, with the ac output voltage V that avoids the lamp current I--c that flows through gaseous discharge lamp 8 to be exported in commutation circuit 13
outthe moment generation current peak value and voltage peak of commutation, and then improve current spike factor.
From above-mentioned prior art, multiple switch elements that the generation of current spike and due to voltage spikes betides existing commutation circuit are to end and the alternating current of electric stabilizer output is the Dead Time of commutation moment simultaneously, and can pass through the second control signal S because the current spike factor of this case improves circuit 16
2and the 3rd control signal S
3between Dead Time T
dtriggering produce Inhibitory signal V
r, the ac output voltage V that control unit 15 is provided at electric stabilizer 1
outthe moment of commutation, can be according to Inhibitory signal V
rand control the instant power that reduces output of change-over circuit 12 to preset value or time-out running, make change-over circuit 12 at the first ~ four switch element M
1~ M
4cut-off simultaneously and commutation circuit 13 while being output as off state, reducing the electric energy of output or stop exporting electric energy, thus, and the ac output voltage V that just can avoid change-over circuit 12 to export in electric stabilizer 1
outafter commutation completes, moment is exported high electric energy, and then improves current spike factor.
Referring again to Fig. 3, in this preferred embodiment, current spike factor improves that circuit 16 comprises Dead Time acquisition circuit 160 and power suppresses circuit 161, and wherein Dead Time acquisition circuit 160 is connected with commutation control circuit 151 and receives the second control signal S
2and the 3rd control signal S
3, it is by the second control signal S
2and the 3rd control signal S
3between Dead Time T
dtriggering and produce a triggering signal V
t, 161, power inhibition circuit captures circuit 160 and determines power control circuit 150 with Dead Time and is connected, and it is in receiving this triggering signal V
ttime the corresponding Inhibitory signal V that produces
rto determining power control circuit 150, make to determine power control circuit 150 according to Inhibitory signal V
rand the corresponding first control signal S that adjusts
1, control by this instant power that reduces output of change-over circuit 12 to preset value, for example reduce the power to 50% of output, or suspend running.
In above-described embodiment, Dead Time acquisition circuit 160 comprises by the first diode D
1and the second diode D
2form with (AND) gate circuit 160a, the first capacitor C
1, the first resistance R
1, the second resistance R
2, the 3rd resistance R
3, the 4th resistance R
4, the 5th resistance R
5and the first transistor, for example PNP bipolar junction transistor B
1, wherein the first diode D
1anode tap be connected with commutation control circuit 151 via an input of Dead Time acquisition circuit 160 and receive the second control signal S
2, the second diode D
2anode tap be connected with commutation control circuit 151 via another input of Dead Time acquisition circuit 160 and receive the 3rd control signal S
3, and the first diode D
1cathode terminal and the second diode D
2cathode terminal be connected in the first contact A altogether, the first capacitor C
1be connected in first and be total between contact A and earth terminal G, the first resistance R
1one end be connected with the electric energy of an external voltage Vi, the first resistance R
1the other end and the second resistance R
2one end connect, the second resistance R
2the other end and the 3rd resistance R
3altogether contact A electrical connection of one end and first, the 3rd resistance R
3the other end be connected with earth terminal G, the first resistance R
1, the second resistance R
2and the 3rd resistance R
3form the first bleeder circuit, and the 3rd resistance R
3with the first capacitor C
1be connected in parallel and the first capacitor C is provided
1discharge path, PNP bipolar junction transistor B
1base stage and the first resistance R
1the other end and the second resistance R
2one end connect, PNP bipolar junction transistor B
1emitter-base bandgap grading and the first resistance R
1one end and external voltage V
ielectric energy connect, PNP bipolar junction transistor B
1collector and the 4th resistance R
4one end connect, the 4th resistance R
4the other end and the 5th resistance R
5one end and the output of Dead Time acquisition circuit 160 be connected in the second contact B altogether, the 5th resistance R
5the other end be connected with earth terminal G.
Power suppresses circuit 161 and comprises the second capacitor C
2, the 6th resistance R
6and transistor seconds, for example NPN bipolar junction transistor B
2, wherein the second capacitor C
2one end via power suppress the input of circuit 161 and Dead Time acquisition circuit 160 output and with the 4th resistance R
4the other end and the 5th resistance R
5one end connect, the second capacitor C
2the other end be connected with earth terminal G, this second capacitor C
2can be via the 5th resistance R
5the discharge path electric discharge providing, NPN bipolar junction transistor B
2base stage and the second capacitor C
2one end connect, and via be connected in power suppress the input of circuit 161 and Dead Time acquisition circuit 160 output and with the 4th resistance R
4and the other end and the 5th resistance R
5one end connect, that is with second altogether contact B be connected, NPN bipolar junction transistor B
2emitter-base bandgap grading be connected with earth terminal G, NPN bipolar junction transistor B
2collector and the 6th resistance R
6one end connect, the 6th resistance R
6the other end suppress the output of circuit 161 and the power control circuit 150 of determining of control unit 15 via power and be connected, it can be regulated the Inhibitory signal of given power control circuit 150 V is provided by setting resistance value
rsize.
To exemplarily illustrate that the electric stabilizer 1 of this case and current spike factor improve the flowing mode of doing of circuit 16 internal circuits below.Referring again to Fig. 4, and coordinate Fig. 2-3, in the time that electric stabilizer 1 operates, if the second control signal S
2and the 3rd control signal S
3not yet enter Dead Time T
dor Dead Time T
dwhile end, that is the second control signal S
2and the 3rd control signal S
3between opposite states, now for activation level, the first diode D that the second control signal S2 of for example 15V or the electric energy of the 3rd control signal S3 connect the correspondence of the AND circuit 160a via Dead Time acquisition circuit 160
1or the second diode D
2be total to contact A and be sent to first, make common contact A by the first capacitor C
1for example approximate the voltage of 15V and set up, thus, when the voltage of common contact A is via the first resistance R
1, the second resistance R
2and the 3rd resistance R
3the first bleeder circuit forming is sent to PNP bipolar junction transistor B
1base stage time, the voltage difference of the voltage in external voltage Vi and the base stage receiving due to the emitter-base bandgap grading of PNP bipolar junction transistor B1 is less than the conducting voltage of PNP bipolar junction transistor B1, therefore PNP bipolar junction transistor B1 is cut-off state, and now Dead Time acquisition circuit 160 will not exported or interrupt trigger signal V accordingly
tsuppress the NPN bipolar junction transistor B of circuit 161 to power
2base stage, therefore NPN bipolar junction transistor B
2base stage and emitter-base bandgap grading between voltage difference be less than NPN bipolar junction transistor B
2conducting voltage, therefore NPN bipolar junction transistor B
2also being cut-off state, is with NPN bipolar junction transistor B
2to not export accordingly Inhibitory signal V
rto control unit 15 determine power control circuit 150, make to determine power control circuit 150 and control change-over circuit 12 to determine the mode normal operation of power stage.
Once as the second control signal S
2and the 3rd control signal S
3enter Dead Time T
d, that is the second control signal S
2and the 3rd control signal S
3between state while being all forbidden energy level, for example 0V, now the first diode D of AND circuit 160a
1and second diode D2 will be cut-off state, therefore first altogether the voltage of contact A correspondence is declined, and react on PNP bipolar junction transistor B via the first bleeder circuit
1base stage, make PNP bipolar junction transistor B
1the external voltage V that receives of emitter-base bandgap grading
ibe greater than PNP bipolar junction transistor B with the voltage difference of the voltage in base stage
1conducting voltage, therefore PNP bipolar junction transistor B
1switch to conducting state, now external voltage V
ielectric energy by the PNP bipolar junction transistor B via conducting
1be sent to by the 4th resistance R
4and the 5th resistance R
5the second bleeder circuit forming, and via the 4th resistance R
4and the 5th resistance R
5dividing potential drop and in the 4th resistance R
4and the 5th resistance R
5between the second contact B altogether of connecting, i.e. the output of Dead Time acquisition circuit 160 produces the trigger voltage V of for example 5V
t, and be sent to NPN bipolar junction transistor B
2base stage, therefore make NPN bipolar junction transistor B
2base stage and emitter-base bandgap grading between voltage difference be greater than NPN bipolar junction transistor B
2conducting voltage, NPN bipolar junction transistor B
2just switch to conducting state, thus, the output of power inhibition circuit 161 will be via the 6th resistance R
6and the NPN bipolar junction transistor B of conducting
2and be connected with earth terminal G, therefore the output of power inhibition circuit 161 will draw ground with earth terminal G by connecting, that is the output of power inhibition circuit 161 will be output as an Inhibitory signal V of no-voltage
rtherefore control unit 15 just can pass through Inhibitory signal V
rand control, change-over circuit 12 is instant to be reduced power to one preset value of output or suspends running, therefore as shown in Figure 5, this case electric stabilizer 1 offers the lamp current I of gaseous discharge lamp 8
ccan't generation current spike or due to voltage spikes in the time of commutation, therefore can improve current spike factor.
Refer to Fig. 6, the circuit box schematic diagram of its electric stabilizer that is another preferred embodiment of this case.As shown in Figure 6; the electric stabilizer 6 of the present embodiment and structure and the functional similarity of the electric stabilizer 1 shown in Fig. 2; therefore represent circuit structure and functional similarity and repeat no more with identical label; only compared to the electric stabilizer 1 shown in Fig. 2, the current spike factor of the electric stabilizer 6 of the present embodiment improves circuit 16 and integrates with electrical power control circuit 150 and commutation control circuit 151 and form microcontroller (Microcontroller Unit; MCU) control unit 60, thus, when control unit 60 contrary and there is Dead Time T by inner commutation control circuit 151 output states
d(as shown in Figure 4) the second control signal S
2and the 3rd control signal S
3to first in commutation circuit 13 ~ to the 4th switch element M
1~ M
4(as shown in Figure 3), time, the current spike factor of control unit 60 inside improves circuit 16 can synchronously learn the second control signal S
2and the 3rd control signal S
3between Dead Time T
d(as shown in Figure 4) generation, and the corresponding Inhibitory signal V that produces
r, in other words, because the control unit 60 of the present embodiment is controlled the second control signal S-and the 3rd control signal S
3between Dead Time T
dgeneration, therefore control unit 60 can be controlled immediately corresponding to the generation of this Dead Time the first control signal S
1change, to control, change-over circuit 12 is instant to be reduced power to one preset value of output or suspends running, therefore exports the second control signal S compared to the electric stabilizer 1 shown in Fig. 2 in control unit 15
2and the 3rd control signal S
3after, the current spike factor that separates independent setting with control unit 15 improves circuit 16 and could pass through to receive the second control signal S
2and the 3rd control signal S
3and by the second control signal S
2and the 3rd control signal S
3between Dead Time T
dtriggering, produce Inhibitory signal V with correspondence
r, the effect of current spike and due to voltage spikes more can be done sth. in advance and immediately suppress to the electric stabilizer 6 of the present embodiment.
In sum, the electric stabilizer that the tool of this case improves current spike factor function immediately captures the Dead Time between the first control signal and the second control signal for controlling the multiple switch element starts in commutation circuit owing to improving circuit by current spike factor, make control unit can be only Dead Time by control signal generation and directly control change-over circuit and immediately reduce power to one preset value of output or suspend running, therefore the control unit of this case can be initiatively and is immediately suppressed the generation of current spike and due to voltage spikes, and then make gaseous discharge lamp there is longer useful life and energy-saving benefit, in addition, the single condition only whether occurring by the Dead Time between the first control signal and the second control signal due to the control unit of this case can be controlled change-over circuit and immediately reduces power to one preset value of output or suspend running, and without whether having the generation of current spike factor as existing electronics peace electrical equipment need to detect the judgement electric current that also change-over circuit is exported by complicated circuit structure and computing, therefore the circuit structure of the electric stabilizer of this case is comparatively simple and cheap, and the processing time of suppressing current spike is also comparatively rapid.
This case must be appointed and be executed that craftsman thinks and be to modify as all by those skilled in the art, so neither de-ly applies for a patent claim Protector that scope is wanted as attached.
Claims (16)
1. an electric stabilizer, comprises:
One change-over circuit, in order to provide a direct voltage;
One commutation circuit, is connected with this change-over circuit, in order to this direct voltage is converted to an ac output voltage, to drive at least one gaseous discharge lamp by the electric energy of this ac output voltage, and has multiple switch elements;
One control unit, be connected with the control end of this change-over circuit and the plurality of switch element, this control unit output one first control signal is to control this change-over circuit, and contrary one second control signal and one the 3rd control signal of output state, to control, this corresponding switch element carries out conducting or cut-off is switched, and wherein between this second control signal and the 3rd control signal, has the Dead Time that the plurality of switch element is ended simultaneously; And
One current spike factor improves circuit, connect this control unit and receive this second control signal and the 3rd control signal, with triggering for generating one Inhibitory signal by this Dead Time to this control unit, make this control unit should adjust this first control signal of output, immediately reduce power to one preset value of output or suspend running to order about this change-over circuit.
2. electric stabilizer as claimed in claim 1, wherein this electric stabilizer has more an input filter and rectification circuit, in order to an AC-input voltage is carried out to filtering and rectification, to export a full-wave direct current voltage.
3. electric stabilizer as claimed in claim 2, wherein this electric stabilizer has more a circuit of power factor correction, is connected between this input filter and rectification circuit and this change-over circuit, in order to improve power factor.
4. electric stabilizer as claimed in claim 1, wherein this change-over circuit is decompression converting circuit.
5. electric stabilizer as claimed in claim 1, wherein this commutation circuit is full-bridge circuit framework.
6. electric stabilizer as claimed in claim 1, wherein this current spike factor improves circuit and comprises:
One Dead Time acquisition circuit, connects this control unit to receive this second control signal and the 3rd control signal, in order to produce a triggering signal by the triggering of this Dead Time; And
One power suppresses circuit, is connected with this control unit and this Dead Time acquisition circuit, and while being used to receive this triggering signal, corresponding this Inhibitory signal that produces is to this control unit.
7. electric stabilizer as claimed in claim 6, wherein this Dead Time acquisition circuit more comprises:
One first diode, the anode tap of this first diode is connected with this control unit and receives this second control signal;
One second diode, the anode tap of this second diode is connected with this control unit and receives the 3rd control signal, and the cathode terminal of the cathode terminal of this second diode and this first diode is connected in one first and is total to contact.
8. electric stabilizer as claimed in claim 7, wherein this Dead Time acquisition circuit more comprises:
One first electric capacity, is connected between this first common contact and an earth terminal;
One first resistance, one end of this first resistance is connected with the electric energy of an external voltage;
One second resistance, one end of this second resistance is connected with the other end of this first resistance, and the other end of this second resistance is connected with this first common contact;
One the 3rd resistance, one end of the 3rd resistance is connected with this other end and this first common contact of this second resistance, and the other end of the 3rd resistance is connected with this earth terminal;
One PNP bipolar junction transistor, its base stage be connected in this first resistance and this second resistance between, its emitter-base bandgap grading is connected with the electric energy of this external voltage;
One the 4th resistance, one end of the 4th resistance is connected with the collector of this PNP bipolar junction transistor; And
One the 5th resistance, the other end of one end of the 4th resistance and the 4th resistance is connected in one second and is total to contact, and the other end of the 5th resistance is connected in this earth terminal.
9. electric stabilizer as claimed in claim 8, wherein in the time of this Dead Time, this first diode and this two diode are cut-off state, making this first voltage level that is total to contact order about this PNP bipolar junction transistor is conducting state, make the electric energy of this external voltage on this second common contact, produce a triggering signal via this PNP bipolar junction transistor, so that this Dead Time acquisition circuit is exported this triggering signal through this second common contact.
10. electric stabilizer as claimed in claim 9, wherein before this Dead Time or while end, one of them is conducting state for this first diode and this two diode, making this first voltage level that is total to contact rise and order about this PNP bipolar junction transistor is cut-off state, so that this Dead Time acquisition circuit stops exporting this triggering signal.
11. electric stabilizers as claimed in claim 6, wherein this power inhibition circuit comprises:
One second electric capacity, is connected in this power and suppresses the input of circuit and have altogether between contact;
One NPN bipolar junction transistor, its base stage system is connected with input and this second electric capacity that this power suppresses circuit, and its emitter-base bandgap grading is connected with this earth terminal; And
One the 6th resistance, one end of the 6th resistance is connected in the collector of this NPN bipolar junction transistor, and the other end of the 6th resistance is connected with the input that this power suppresses circuit.
12. electric stabilizers as claimed in claim 11, wherein in the time that this Dead Time acquisition circuit produces this triggering signal to this power and suppresses the input of circuit, the conducting by this triggering signal of this NPN bipolar junction transistor, make output that this power suppresses circuit be connected in this earth terminal via the 6th resistance and this NPN bipolar junction transistor conducting, so that this power suppresses, the output of circuit is corresponding produces this Inhibitory signal that level changes.
13. electric stabilizers as claimed in claim 12, wherein in the time that this Dead Time acquisition circuit stops producing this triggering signal to this power and suppresses the input of circuit, this NPN bipolar junction transistor switches to cut-off state, and the output that makes this power suppress circuit stops producing this Inhibitory signal.
14. electric stabilizers as claimed in claim 1, wherein this control unit comprises:
Certain power control circuit, improving circuit with this change-over circuit and this current spike factor is connected, export this corresponding first control signal in order to this direct voltage of exporting according to this change-over circuit and a working direct current electric current, be output as and determine power to control this change-over circuit, and adjust this first control signal according to this Inhibitory signal, power to this preset value or time-out that immediately reduces output to order about this change-over circuit operates; And
One commutation control circuit, is connected with this commutation circuit, controls signal to this corresponding switch element in order to export this second control signal and the 3rd.
15. 1 kinds of electric stabilizers, comprise:
One change-over circuit, in order to provide a direct voltage;
One commutation circuit, is connected with this change-over circuit, in order to this direct voltage is converted to an ac output voltage, to drive at least one gaseous discharge lamp by the electric energy of this ac output voltage; And
One control unit, be connected with the control end of this change-over circuit and the plurality of switch element, this control unit output one first control signal is to control this change-over circuit, and contrary one second control signal and one the 3rd control signal of output state, to control, this corresponding switch element carries out conducting or cut-off is switched, and wherein between this second control signal and the 3rd control signal, has the Dead Time that the plurality of switch element is ended simultaneously;
Wherein this control unit changes corresponding to this first control signal of controlling of this Dead Time, immediately reduces power to one preset value of output or suspends running to order about this change-over circuit.
16. electric stabilizers as claimed in claim 15, wherein this control unit comprises:
Certain power control circuit, is connected with this change-over circuit, exports this first control signal of correspondence in order to this direct voltage of exporting according to this change-over circuit and a working direct current electric current, is output as and determines power to control this change-over circuit; And
One commutation control circuit, is connected with this commutation circuit, controls signal to this corresponding switch element in order to export this second control signal and the 3rd; And
One current spike factor improves circuit, be connected with this commutation control circuit and receive this second control signal and the 3rd control signal, and determining power control circuit with this is connected, change in order to control this first control signal corresponding to this Dead Time, power to this preset value or time-out that immediately reduces output to order about this change-over circuit operates.
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| CN201210462385.4A CN103826375B (en) | 2012-11-16 | 2012-11-16 | Tool improves the electric stabilizer of current spike factor function immediately |
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| CN201210462385.4A CN103826375B (en) | 2012-11-16 | 2012-11-16 | Tool improves the electric stabilizer of current spike factor function immediately |
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| CN103826375B (en) | 2016-02-10 |
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