CN202095165U - Ceramic metal halide lamp ballast power compensation system and ceramic metal halide lamp ballast - Google Patents
Ceramic metal halide lamp ballast power compensation system and ceramic metal halide lamp ballast Download PDFInfo
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- CN202095165U CN202095165U CN2011201346973U CN201120134697U CN202095165U CN 202095165 U CN202095165 U CN 202095165U CN 2011201346973 U CN2011201346973 U CN 2011201346973U CN 201120134697 U CN201120134697 U CN 201120134697U CN 202095165 U CN202095165 U CN 202095165U
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Abstract
The utility model relates to a ceramic metal halide lamp ballast power compensation system, which comprises a conducting judging module, a sampling loop, a compensating module and a calculating module. The conducting judging module is used for judging whether the switching tube M2 of a lower bridge arm in a semi-bridge double BUCK circuit is conducted or not; the sampling loop is used for sampling the working currents of a ceramic metal halide lamp according to the judgment result of the conducting judging module to obtain current sampling values; the compensating module is used for implementing sectional compensation calculation on the current sampling values to obtain the compensated current sampling values; and the calculating module is used for adjusting the output power of a ceramic metal halide lamp ballast according to the compensated current sampling values. The utility model also relates to a ceramic metal halide lamp ballast. The output constant power control of the ceramic metal halide lamp ballast can be precisely implemented by implementing power compensation on sampling, so that the defect that errors are caused by using an MCU (Microprogrammed Control Unit) to implement constant power control in the two-stage scheme of the current ceramic metal halide lamp ballast can be avoided.
Description
Technical field
The utility model relates to power control field, more particularly, relates to a kind of ceramic gold-halogen lamp ballast power bucking-out system.
Background technology
Along with China's rapid economy development, energy problem more and more causes people's attention, an energy-saving and cost-reducing great strategic problem that has become current China.Ceramic gold-halogen lamp more and more demonstrates its superiority as a kind of energy-conservation, new type light source efficiently.Be widely used in the indoor and outdoor lighting environment such as household, square, harbour, workshop, road, in current illuminator, occupy an important position.Electric ballast is a kind of electric power conversion apparatus, the specific (special) requirements of electric ballast has been increased the complexity of its design owing to the ceramic gold-halogen lamp load.
Ceramic gold-halogen lamp ballast scheme major part in the market all is to adopt three grades of schemes of two BUCK (step-down) circuit of full-bridge, and it adopts analog chip to carry out permanent power control, because full-bridge circuit switching tube quantity is many, components and parts are many, cost is high.Therefore three grades of schemes need be improved.
And compare with full-bridge circuit, the half-bridge circuit switching tube quantity of two-step scheme is few, and cost is low relatively.Because half-bridge circuit has only two switching tubes, utilize half-bridge driven IC (chip) not have the problem of break-make simultaneously, and its anti-unbalance ability is strong, that is to say that the requirement to PWM (pulse-width modulation) is not very high, so drive circuit is just simple a lot of with respect to full-bridge, is fit to be applied in the electric ballast constant power electronic equipment.Because what two-step scheme adopted is half-bridge structure, all be to adopt MCU (single-chip microcomputer) or the integrated chip of MCU (single-chip microcomputer) to carry out the permanent power control of ballast mostly.Adopt MCU (single-chip microcomputer) that ceramic gold-halogen lamp lamp tube ends voltage and the electric current that flows through ceramic gold-halogen lamp are carried out A/D (modulus) conversion sampling and carry out the control of permanent power, because the resolution of A/D (modulus) conversion own is limited, particularly pass through the filtered signal sampling of RC (resistance capacitance) for small-signal and have error, add A/D (modulus) conversion sampling itself and just have slight error, so just can not accurately control, therefore generally all need the compensation of sampling permanent power.
The utility model content
The technical problems to be solved in the utility model is, the defective that has error at the control of using MCU to carry out permanent power in the two-step scheme of existing ceramic gold-halogen lamp ballast, provide a kind of, can accurately carry out the ceramic gold-halogen lamp ballast power bucking-out system of ceramic gold-halogen lamp ballast output constant power control by power back-off is carried out in sampling.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of ceramic gold-halogen lamp ballast power bucking-out system, comprising the switching tube M2 of the following brachium pontis that is used for judging the two BUCK circuit of the half-bridge conducting judge module of conducting whether; Be used for the operating current of ceramic gold-halogen lamp being sampled, obtain the sampling circuit of current sampling data according to the judged result of described conducting judge module; Be used for that described current sampling data is carried out segmented compensation and calculate the compensating module of the current sampling data after being compensated; And be used for the computing module the power output of described ceramic gold-halogen lamp ballast regulated according to the current sampling data after the described compensation.
In ceramic gold-halogen lamp ballast power bucking-out system described in the utility model, described system also comprises: be used for according to the deviation formula
Set described segmented compensation in calculating a plurality of segmented compensation amounts and the setting module in corresponding segmented compensation interval; R wherein
2Be sampling resistor, K is a proportionality constant, I
2Be the operating current of ceramic gold-halogen lamp, R
1Be the filter resistance of described sampling circuit, C
5Be the filter capacitor of described sampling circuit, t is the charging interval of described sampling circuit.
In ceramic gold-halogen lamp ballast power bucking-out system described in the utility model, described compensating module comprises: the judging unit that is used to judge the segmented compensation interval at described current sampling data place; And be used for described current sampling data being carried out segmented compensation calculating, the compensating unit of the current sampling data after being compensated according to the interval corresponding segmented compensation amount of the segmented compensation at described current sampling data place.
In ceramic gold-halogen lamp ballast power bucking-out system described in the utility model, described system also comprises: the auxiliary sampling module that is used to carry out voltage signal sampling.
In ceramic gold-halogen lamp ballast power bucking-out system described in the utility model, the filter resistance R of described sampling circuit
1Filter capacitor C with described sampling circuit
5Product be 10 to the maximum
-4The filter capacitor C of described sampling circuit
5Maximum be 100nF.
The utility model also relates to a kind of ceramic gold-halogen lamp ballast, comprising the programming device of output pwm control signal, be used to drive the half-bridge driven IC of half-bridge switch pipe M1 and half-bridge switch pipe M2 and be used for the power compensating system that the operating current by the sampling ceramic gold-halogen lamp carries out ceramic gold-halogen lamp ballast output power compensation, described programming device is connected with described half-bridge driven IC, and described half-bridge switch pipe M2 is connected with described power compensating system.
In ceramic gold-halogen lamp ballast described in the utility model, whether the switching tube M2 that described power compensating system comprises the following brachium pontis that is used for judging the two BUCK circuit of half-bridge the conducting judge module of conducting; Be used for the operating current of ceramic gold-halogen lamp being sampled, obtain the sampling circuit of current sampling data according to the judged result of described conducting judge module; Be used for that described current sampling data is carried out segmented compensation and calculate the compensating module of the current sampling data after being compensated; And be used for the computing module the power output of described ceramic gold-halogen lamp ballast regulated according to the current sampling data after the described compensation.
In ceramic gold-halogen lamp ballast described in the utility model, described power compensating system also comprises: be used for according to the deviation formula
Set described segmented compensation in calculating a plurality of segmented compensation amounts and the setting module in corresponding segmented compensation interval; R wherein
2Be sampling resistor, K is a proportionality constant, I
2Be the operating current of ceramic gold-halogen lamp, R
1Be the filter resistance of described sampling circuit, C
5Be the filter capacitor of described sampling circuit, t is the charging interval of described sampling circuit.
In ceramic gold-halogen lamp ballast described in the utility model, described compensating module comprises: the judging unit that is used to judge the segmented compensation interval at described current sampling data place; And be used for described current sampling data being carried out segmented compensation calculating, the compensating unit of the current sampling data after being compensated according to the interval corresponding segmented compensation amount of the segmented compensation at described current sampling data place.
In ceramic gold-halogen lamp ballast described in the utility model, the filter resistance R of described sampling circuit
1Filter capacitor C with described sampling circuit
5Product be 10 to the maximum
-4The filter capacitor C of described sampling circuit
5Maximum be 100nF.
Implement ceramic gold-halogen lamp ballast power bucking-out system of the present utility model and ceramic gold-halogen lamp ballast, has following beneficial effect: by power back-off is carried out in sampling, can accurately carry out ceramic gold-halogen lamp ballast output constant power control, there is the defective of error in the control of having avoided using MCU to carry out permanent power in the two-step scheme of existing ceramic gold-halogen lamp ballast.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the flow chart of first preferred embodiment of ceramic gold-halogen lamp ballast power of the present utility model compensation method;
Fig. 2 is the flow chart of second preferred embodiment of ceramic gold-halogen lamp ballast power of the present utility model compensation method;
Fig. 3 is the flow chart of the 3rd preferred embodiment of ceramic gold-halogen lamp ballast power of the present utility model compensation method;
Fig. 4 is the flow chart of the 4th preferred embodiment of ceramic gold-halogen lamp ballast power of the present utility model compensation method;
Fig. 5 is the structural representation of first preferred embodiment of ceramic gold-halogen lamp ballast power bucking-out system of the present utility model;
Fig. 6 is the structural representation of second preferred embodiment of ceramic gold-halogen lamp ballast power bucking-out system of the present utility model;
Fig. 7 is the structural representation of the 3rd preferred embodiment of ceramic gold-halogen lamp ballast power bucking-out system of the present utility model;
Fig. 8 is the physical circuit figure of the preferred embodiment of ceramic gold-halogen lamp ballast power bucking-out system of the present utility model;
Fig. 9 is the particular flow sheet of the preferred embodiment of ceramic gold-halogen lamp ballast power of the present utility model compensation method.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The hardware elementary diagram of the current sample of ceramic gold-halogen lamp ballast power bucking-out system of the present utility model part is as shown in Figure 8: Vbus is the busbar voltage of ceramic gold-halogen lamp ballast, when last brachium pontis switching tube M1 conducting, last brachium pontis work, to descend brachium pontis switching tube M2 to end sampling resistor R by control signal this moment
2Last no current passes through, and do not sample to the operating current of ceramic gold-halogen lamp this moment; And during brachium pontis switching tube M2 conducting instantly, following brachium pontis work will be gone up brachium pontis switching tube M1 by control signal and end this moment, simultaneously the operating current of ceramic gold-halogen lamp be sampled.Because the two BUCK topological structures of half-bridge Direct Sampling effectively flow through the electric current of ceramic gold-halogen lamp, but the electric current of the equivalent ceramic gold-halogen lamp of sampling, thereby influenced control precision for the permanent power of ceramic gold-halogen lamp, cause the actual motion variable power scope of ceramic gold-halogen lamp big, surpass the target control performance number ± 5%, so be necessary the electric current that samples is carried out algorithm compensation, so that the actual current value linear correlation of current value behind algorithm compensation and ceramic gold-halogen lamp.
Below by Fig. 8 the principle that compensation rate obtains is described.
The actual current of the electric current of brachium pontis switching tube M2 and ceramic gold-halogen lamp relation under flowing through, and the signal halves of arrival programming device IO mouth is analysed as follows: sampling resistor R
2Flow through source electrode and drain current I during following brachium pontis switching tube M2 conducting
1(I
1Mean value, can think I
1/ 2 and the operating current I of ceramic gold-halogen lamp
2Therefore near-linear dependency can be thought I
2=K * I
1, K is a proportionality constant) and be converted into voltage signal V
1(V
1=R
2* I
1), this voltage signal is through R
1And C
5Charge circuit is to C
5Charge, obtain capacitor C
5On voltage signal
So have
And if line sampling, V
2Should equal
As seen from the above analysis, the electric current that this sampled voltage can not directly react ceramic gold-halogen lamp linearly changes, but has certain departing from according to this equation curve, and its value that departs from is
Thus can: look at that from same time point electric current is more little, linearity height, electric current are big more, depart from greatly more; When electric current remains unchanged, the linearity is low during charging just, charging interval, the long more linearity was good more, in order not influence the permanent power control precision of ceramic gold-halogen lamp because of sampling, be necessary the current value that the samples compensation of sampling, and bucking-out system of the present utility model is carried out according to the above-mentioned theory analysis exactly.
In the flow chart of first preferred embodiment of ceramic gold-halogen lamp ballast power of the present utility model compensation method shown in Figure 1, shown in method start from step 100, carry out subsequently:
Last this method ends at step 105.
Capacitor C
5On voltage signal
Convert digital signal to through the programming AD converter that device had, be stored in the programming device.According to above-mentioned analysis, the charging interval is long more, and the linearity is high more, so sampling algorithm in the selection of current sample time point, selects to avoid just to begin time period of charging, treats just to sample after signal steadily; This method is considered the current signal sample and the deviation of ceramic gold-halogen lamp actual current signal then, and the signal that the programming device samples is littler than the signal that actual needs samples, and its deviation is
Therefore the compensation that different current sampling datas is carried out segmentation is calculated and can effectively be reduced amount of calculation, can also the deviation of signal be compensated preferably simultaneously, and the calculating of concrete compensation rate can be according to formula
Draw.When the hope compensation is accurate more, can be provided with between the compensating basin of greater number, with the refinement compensation rate; And when wishing to realize compensation fast, can be provided with between the compensating basin of lesser amt, on the basis that can not exert an influence, accelerate the response speed of compensation to compensation effect, cost is lower when realizing simultaneously.
In the flow chart of second preferred embodiment of ceramic gold-halogen lamp ballast power of the present utility model compensation method shown in Figure 2, shown in method start from step 200, carry out subsequently:
Last this method ends at step 206.
In advance segmented compensation amount and segmented compensation interval are provided with, the user can select the quantity in segmented compensation amount and segmented compensation interval, the feasible permanent power controlled target that can satisfy customer requirements fast and accurately flexibly according to programme device and actual needs.
In the flow chart of the 3rd preferred embodiment of ceramic gold-halogen lamp ballast power of the present utility model compensation method shown in Figure 3, shown in method start from step 300, carry out subsequently:
Last this method ends at step 307.
This method is regulated operating current by adopt different current compensation amounts in different segmented compensations interval, and regulative mode is simple, and response speed is fast, can realize by predetermined constant numerical value in program.
In the flow chart of the 4th preferred embodiment of ceramic gold-halogen lamp ballast power of the present utility model compensation method shown in Figure 4, shown in method start from step 400, carry out subsequently:
Step 405 is regulated the power output of described ceramic gold-halogen lamp ballast according to the current sampling data after the described compensation;
Last this method ends at step 406.
Other signal samplings are the control that can better realize the permanent power of ceramic gold-halogen lamp ballast that combines of voltage sample and current sample for example.
As the preferred embodiment of ceramic gold-halogen lamp ballast power of the present utility model compensation method, the filter resistance R of described sampling circuit
1Filter capacitor C with described sampling circuit
5Product be 10 to the maximum
-4The filter capacitor C of described sampling circuit
5Maximum be 100nF.So can under the distortionless situation of lamp current signal, sample.
The utility model also relates to a kind of ceramic gold-halogen lamp ballast power bucking-out system, in the structural representation of first preferred embodiment of ceramic gold-halogen lamp ballast power bucking-out system of the present utility model shown in Figure 5, described ceramic gold-halogen lamp ballast power bucking-out system comprises conducting judge module 1, sampling circuit 2, compensating module 3 and computing module 4, and conducting judge module 1 is used for judging the whether conducting of switching tube M2 of the following brachium pontis of the two BUCK circuit of half-bridge; Sampling circuit 2 is sampled to the operating current of ceramic gold-halogen lamp according to the judged result of described conducting judge module 1, obtains current sampling data; Compensating module 3: be used for that described current sampling data is carried out segmented compensation and calculate the current sampling data after being compensated; Computing module 4: be used for the power output of described ceramic gold-halogen lamp ballast being regulated according to the current sampling data after the described compensation.The segmentation of compensation calculating carry out to(for) different current sampling data compensating module 3 can effectively reduce amount of calculation, computing module 4 can also be regulated preferably to the deviation of signal simultaneously, when hope is regulated more accurately, compensating module 3 can be provided with between the compensating basin of greater number, with the regulated quantity of refinement computing module 4; And when wishing to realize quick adjustment, compensating module 3 can be provided with between the compensating basin of lesser amt, accelerates the response speed that computing module 4 is regulated on the basis that can not exert an influence to compensation effect, and cost is lower when realizing simultaneously.
In the structural representation of second preferred embodiment of ceramic gold-halogen lamp ballast power bucking-out system of the present utility model shown in Figure 6, described ceramic gold-halogen lamp ballast power bucking-out system also comprises setting module 5, and setting module 5 is used for according to the deviation formula
Set a plurality of segmented compensation amounts and corresponding segmented compensation interval in the described segmented compensation calculating; R wherein
2Be sampling resistor, K is a proportionality constant, I
2Be the operating current of ceramic gold-halogen lamp, R
1Be the filter resistance of described sampling circuit 2, C
5Be the filter capacitor of described sampling circuit 2, t is the charging interval of described sampling circuit 2.Setting module 5 is provided with segmented compensation amount and segmented compensation interval in advance, the user can select the quantity in segmented compensation amount and segmented compensation interval, the feasible permanent power controlled target that can satisfy customer requirements fast and accurately flexibly according to programme device and actual needs.
In the structural representation of the 3rd preferred embodiment of ceramic gold-halogen lamp ballast power bucking-out system of the present utility model shown in Figure 7, described compensating module 3 comprises judging unit 31 and compensating unit 32, and judging unit 31 is used to judge the segmented compensation interval at described current sampling data place; Compensating unit 32 is used for according to the interval corresponding segmented compensation amount of the segmented compensation at described current sampling data place described current sampling data being carried out segmented compensation and calculates the current sampling data after being compensated.Native system adopts different current compensation amounts that operating current is regulated in different segmented compensations interval by judging unit 31 and compensating unit 32, and regulative mode is simple, and response speed is fast, can realize by predetermined constant numerical value in program.
As the preferred embodiment of ceramic gold-halogen lamp ballast power bucking-out system of the present utility model, described ceramic gold-halogen lamp ballast power bucking-out system also comprises auxiliary sampling module 6, and auxiliary sampling module 6 is used to carry out voltage signal sampling.The control that can better realize the permanent power of ceramic gold-halogen lamp ballast that combines of voltage signal sampling and current sample.
As the preferred embodiment of ceramic gold-halogen lamp ballast power bucking-out system of the present utility model, the filter resistance R of described sampling circuit 2
1Filter capacitor C with described sampling circuit 2
5Product be 10 to the maximum
-4The filter capacitor C of described sampling circuit 2
5Maximum be 100nF.So can under the distortionless situation of lamp current signal, sample.Particular flow sheet below by the preferred embodiment of the ceramic gold-halogen lamp ballast power of the present utility model compensation method of Fig. 9 describes specific implementation flow process of the present utility model.
As shown in Figure 9, at first enter sampling routine, judge whether it is current sample, as if not current sample then enters other signal sampling program; If as current sample, then enter the current sample program.Because what adopt is two-step scheme, therefore only when second brachium pontis switching tube M2 conducting, just electric current is sampled.So judge whether it is down brachium pontis switching tube M2 conducting earlier, as if not current sample is not then carried out in brachium pontis switching tube M2 conducting down; If as brachium pontis switching tube M2 conducting down, then carry out the ceramic gold-halogen lamp current sample, getting current sampling data is HBCur_AD.Algorithm adopts the mode of segmented compensation to carry out, (n is a constant promptly to preset n earlier in program, can set size according to the working control demand, being generally less than and equaling 32) constant numerical value is (as D1, D2, Dn, and D1＜D2＜...＜Dn, the size of these numerical value can be selected flexibly according to programming device and actual needs, such as for the programming device that has only 10 bit AD samples, Dn needs＜1023), form n+1 segmented compensation interval, the 1st section is the numerical value section (segmented compensation interval) less than D1 so, and the 2nd section for more than or equal to the numerical value section of D1 less than D2, and the like, up to more than or equal to the Dn section, i.e. n+1 numerical value section, which numerical value section the HBCur_AD signal value that is sampled is in, just corresponding compensation the amount that should compensate, the value that it compensated can be according to the deviation formula
Calculate, in program, set then, promptly C1, C2 ..., Cn, Cn+1.After above-mentioned data processing, the linearity of the new data of gained and the actual current signal of ceramic gold-halogen lamp is just higher.Just reached the purpose of preliminary correcting current sampled value HBCur_AD by above step, the calculating and the proportion integration differentiation of going to participate in permanent power are regulated again, and just can satisfy permanent power controlled target.
The utility model also relates to a kind of ceramic gold-halogen lamp ballast, comprising the programming device of output pwm control signal, be used to drive the half-bridge driven IC of half-bridge switch pipe M1 and half-bridge switch pipe M2 and be used for the power compensating system that the operating current by the sampling ceramic gold-halogen lamp carries out ceramic gold-halogen lamp ballast output power compensation, described programming device is connected with described half-bridge driven IC, and described half-bridge switch pipe M2 is connected with described power compensating system.Ceramic gold-halogen lamp ballast of the present utility model is by carrying out power back-off to sampling, can accurately carry out ceramic gold-halogen lamp ballast output constant power control, there is the defective of error in the control of having avoided using MCU to carry out permanent power in the two-step scheme of existing ceramic gold-halogen lamp ballast.The embodiment of ceramic gold-halogen lamp ballast of the present utility model is identical with the specific embodiment of above-mentioned ceramic gold-halogen lamp ballast power bucking-out system with beneficial effect, sees also above-mentioned specific embodiment.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure transformation that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (9)
1. a ceramic gold-halogen lamp ballast power bucking-out system is characterized in that, comprises
Be used for judging the switching tube M2 conducting judge module (1) of conducting whether of the following brachium pontis of the two BUCK circuit of half-bridge;
Be used for the operating current of ceramic gold-halogen lamp being sampled, obtain the sampling circuit (2) of current sampling data according to the judged result of described conducting judge module (1);
Be used for that described current sampling data is carried out segmented compensation and calculate the compensating module of the current sampling data after being compensated (3); And
Be used for the computing module (4) the power output of described ceramic gold-halogen lamp ballast regulated according to the current sampling data after the described compensation.
2. ceramic gold-halogen lamp ballast power bucking-out system according to claim 1 is characterized in that described system also comprises:
Be used for according to the deviation formula
Set described segmented compensation in calculating a plurality of segmented compensation amounts and the setting module (5) in corresponding segmented compensation interval; R wherein
2Be sampling resistor, K is a proportionality constant, I
2Be the operating current of ceramic gold-halogen lamp, R
1Be the filter resistance of described sampling circuit (2), C
5Be the filter capacitor of described sampling circuit (2), t is the charging interval of described sampling circuit (2).
3. ceramic gold-halogen lamp ballast power bucking-out system according to claim 2 is characterized in that, described compensating module (3) comprising:
Be used to judge the judging unit (31) in the segmented compensation interval at described current sampling data place; And
Be used for described current sampling data being carried out segmented compensation and calculate the compensating unit of the current sampling data after being compensated (32) according to the interval corresponding segmented compensation amount of the segmented compensation at described current sampling data place.
4. ceramic gold-halogen lamp ballast power bucking-out system according to claim 1 is characterized in that described system also comprises:
Be used to carry out the auxiliary sampling module (6) of voltage signal sampling.
5. ceramic gold-halogen lamp ballast power bucking-out system according to claim 2 is characterized in that, the filter resistance R of described sampling circuit (2)
1Filter capacitor C with described sampling circuit (2)
5Product be 10 to the maximum
-4The filter capacitor C of described sampling circuit (2)
5Maximum be 100nF.
6. ceramic gold-halogen lamp ballast, it is characterized in that, comprise the programming device of exporting pwm control signal, be used to drive the half-bridge driven IC of half-bridge switch pipe M1 and half-bridge switch pipe M2 and be used for the power compensating system that the operating current by the sampling ceramic gold-halogen lamp carries out the compensation of ceramic gold-halogen lamp ballast output power, described programming device is connected with described half-bridge driven IC, and described half-bridge switch pipe M2 is connected with described power compensating system;
Whether the switching tube M2 that described power compensating system comprises the following brachium pontis that is used for judging the two BUCK circuit of half-bridge the conducting judge module (1) of conducting;
Be used for the operating current of ceramic gold-halogen lamp being sampled, obtain the sampling circuit (2) of current sampling data according to the judged result of described conducting judge module (1);
Be used for that described current sampling data is carried out segmented compensation and calculate the compensating module of the current sampling data after being compensated (3); And
Be used for the computing module (4) the power output of described ceramic gold-halogen lamp ballast regulated according to the current sampling data after the described compensation.
7. ceramic gold-halogen lamp ballast according to claim 6 is characterized in that, described power compensating system also comprises:
Be used for according to the deviation formula
Set described segmented compensation in calculating a plurality of segmented compensation amounts and the setting module (5) in corresponding segmented compensation interval; R wherein
2Be sampling resistor, K is a proportionality constant, I
2Be the operating current of ceramic gold-halogen lamp, R
1Be the filter resistance of described sampling circuit (2), C
5Be the filter capacitor of described sampling circuit (2), t is the charging interval of described sampling circuit (2).
8. ceramic gold-halogen lamp ballast according to claim 7 is characterized in that, described compensating module (3) comprising:
Be used to judge the judging unit (31) in the segmented compensation interval at described current sampling data place; And
Be used for described current sampling data being carried out segmented compensation and calculate the compensating unit of the current sampling data after being compensated (32) according to the interval corresponding segmented compensation amount of the segmented compensation at described current sampling data place.
9. ceramic gold-halogen lamp ballast according to claim 7 is characterized in that, the filter resistance R of described sampling circuit (2)
1Filter capacitor C with described sampling circuit (2)
5Product be 10 to the maximum
-4The filter capacitor C of described sampling circuit (2)
5Maximum be 100nF.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201346973U CN202095165U (en) | 2011-04-29 | 2011-04-29 | Ceramic metal halide lamp ballast power compensation system and ceramic metal halide lamp ballast |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201346973U CN202095165U (en) | 2011-04-29 | 2011-04-29 | Ceramic metal halide lamp ballast power compensation system and ceramic metal halide lamp ballast |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816757A (en) * | 2019-11-15 | 2021-05-18 | 许继集团有限公司 | All-fiber current transformer and half-wave voltage correction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816757A (en) * | 2019-11-15 | 2021-05-18 | 许继集团有限公司 | All-fiber current transformer and half-wave voltage correction method thereof |
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