CN201153344Y - Intelligent light modulating electronic ballast - Google Patents
Intelligent light modulating electronic ballast Download PDFInfo
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- CN201153344Y CN201153344Y CNU2008200308101U CN200820030810U CN201153344Y CN 201153344 Y CN201153344 Y CN 201153344Y CN U2008200308101 U CNU2008200308101 U CN U2008200308101U CN 200820030810 U CN200820030810 U CN 200820030810U CN 201153344 Y CN201153344 Y CN 201153344Y
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Abstract
The utility model relates to an intelligent light-adjusting electronic ballast which comprises a control circuit. The input end of the control circuit is connected with an exterior circuit; the output end of the control circuit is connected with the input end of a half-bridge contravariance drive-control circuit through a RC periodic circuit; an AC power supply is connected with the input end of the half-bridge contravariance drive-control circuit through a power supply circuit; the output end of the half-bridge contravariance drive-control circuit is connected with a high-pressure discharge lamp HID which is connected with the control circuit through a collecting-amplifying circuit. Through confirming the voltage reference of the lamp, the voltage reference of the lamp is caused to be directly proportional with the power thereof, so the power of the lamp changes along with the change of the voltage reference, thereby being convenient for accurately controlling the power of the lamp and realizing the light adjustment. The intelligent light-adjusting electronic ballast is suitable to be used for various lamps, in addition, a suppressing circuit is arranged, so the flicker phenomenon in the light-adjusting process is avoided.
Description
Technical field
The utility model relates to a kind of electric consumption on lighting device, especially a kind of high-intensity gas discharge lamp intelligent light adjusting electronic rectifier.
Background technology
At present, high-power high-intensity gas discharge lamp has following two kinds with the light regulating technology of functional dimming electronic ballast:
(1) frequency conversion light modulation: in the LC network of semibridge system electric ballast output, current-limiting inductance is connected with fluorescent tube, at inductance value L one regularly, its impedance Z=2 π fL as long as change frequency f, just can change the value of impedance Z, thereby change the electric current of lamp, reach the purpose of adjusting lamp power, changing light.Changing frequency is to realize by the output frequency of oscillation that changes drive circuit, and this frequency is by a RC oscillating circuit decision, changes the resistance of R, just can change the frequency of drive circuit.At present with an automatic light meter is the resistance of controlling R by single-chip microcomputer and software, thereby control frequency is realized light modulation.
The utilization of frequency conversion light modulation at present is more, and its advantage is: circuit is fairly simple, is easy to software controlled, and dimming scope also can be satisfied the demand, but following shortcoming is arranged:
The first, frequency conversion brightness adjustment control frequency is comparatively accurate, and the control of corresponding lamp power is very rough, for same model, with the different fluorescent tubes of producer, because the characteristic difference of each fluorescent tube, bigger power output difference can appear in same control frequency, can reach 40% error sometimes.
The second, when frequency change, the power of output lamp can suddenly change, and produces scintillation, influences the useful life of fluorescent tube.
(2) phase dimming: lamp power is to realize by the phase shift between control modulating voltage and the lamp current.By modulation to operating frequency and drive circuit, when voltage and electric current same-phase, the lamp power maximum of output, otherwise, output power.
The shortcoming of phase dimming is: increased the complexity and the cost of control circuit, the reliability decrease of circuit simultaneously, also is not easy to implement control.
The utility model content
The purpose of this utility model is to provide a kind of can accurately control lamp power, be suitable for the intelligent light adjusting electronic rectifier that various high-voltage gas discharging lights use.
For achieving the above object, a kind of intelligent light adjusting electronic rectifier that the utility model provides, comprise control circuit, the input of control circuit receives the timing signal and the power setting signal of external circuit output, the output of control circuit links to each other with the input of drive circuit by the RC oscillating circuit, AC power supplies links to each other with the input of drive circuit by power circuit, the output of drive circuit links to each other with high-voltage gas discharging light HID, and the virtual voltage of gathering amplifying circuit collection high-voltage gas discharging light HID inputs to control circuit.
The utility model is determined the reference voltage of high-voltage gas discharging light HID by control circuit, its reference voltage is directly proportional with its power, gather the virtual voltage of high-voltage gas discharging light HID by Acquisition Circuit, control circuit compares virtual voltage and its reference voltage of high-voltage gas discharging light HID, the output signal of telecommunication is controlled the variable power of high-voltage gas discharging light HID to the RC oscillating circuit by the frequency of regulating the RC oscillating circuit.The utility model both had been convenient to accurately control the power of high-voltage gas discharging light HID, realized light modulation, was suitable for various high-voltage gas discharging light HID again and used.
Description of drawings
Fig. 1 is a block diagram of the present utility model;
Fig. 2,3 is respectively control circuit figure of the present utility model.
Embodiment
A kind of intelligent light adjusting electronic rectifier, comprise control circuit 20, the input of control circuit 20 receives the timing signal and the power setting signal of external circuit 10 outputs, the output of control circuit 20 links to each other with the input of semi-bridge inversion Drive and Control Circuit 40 by RC oscillating circuit 30, AC power supplies links to each other with the input of semi-bridge inversion Drive and Control Circuit 40 by power circuit 60, the output of semi-bridge inversion Drive and Control Circuit 40 links to each other with high-voltage gas discharging light HID by inductive transformer T, and the virtual voltage of gathering amplifying circuit 50 collection high-voltage gas discharging light HID inputs to control circuit 20.
In conjunction with Fig. 2, described control circuit 20 comprises single-chip microcomputer 21, digital regulation resistance 22, suppresses circuit 23 and frequency control circuit 24.Single-chip microcomputer P87LPC767 in single-chip microcomputer 21 corresponding diagram, the input of single-chip microcomputer P87LPC767 links to each other with the output of external circuit 10, resistance R T1, RT2, RT5, RT6, RT7, RT8, RT3, RT10 form external circuit 10, external circuit 10 is shown as two rotation band switches on the end cap of ballast, by user's select time and power.If the user selects 5 hours, 70% power, its implication be electric ballast after energized by the rated power work of high-voltage gas discharging light HID 5 hours, press later 70% of rated power in 5 hours to work, until deenergization.Energized reruns this program next time.
Single-chip microcomputer P87LPC767 sets the reference voltage V of high-voltage gas discharging light HID
Ref, V
RefValue be preferably 0～5V, promptly its maximum is 5V, works as V
RefDuring=5V, the power output of high-voltage gas discharging light HID is its rated power.The power output of high-voltage gas discharging light HID and its reference voltage V
RefBe directly proportional, its relational expression is: P
L=P
VolumeV
Ref/ 5, wherein, P
L, P
VolumeBe respectively power output, the rated power of high-voltage gas discharging light HID, 5 is reference voltage V
RefMaximum.Determine the reference voltage V of high-voltage gas discharging light HID
RefAfter, reference voltage V
RefFor different high-voltage gas discharging light HID, its maximum 5V is a fixed value.
In conjunction with Fig. 2, the output of single-chip microcomputer P87LPC767 links to each other with the input of digital regulation resistance 22, and digital regulation resistance 22 can replace with digital to analog converter.Digital regulation resistance AD5245 in digital regulation resistance 22 corresponding diagram, digital regulation resistance AD5245 links to each other with the input of frequency control circuit 24 by suppressing circuit 23, suppress circuit 23 and form, be connected across on 1,6 pins of digital regulation resistance AD5245 after resistance R T13, the capacitor C T5 series connection by the second resistance R T13 and the second capacitor C T5.The effect that suppresses circuit 23 is to suppress the sudden change of high-voltage gas discharging light HID power, to avoid producing scintillation in the process of light modulation.In addition, the CT3 among the figure, CT4, CR1 form crystal oscillating circuit, and three-terminal voltage-stabilizing pipe 7805 provides+power supply of 5V for single-chip microcomputer P87LPC767 and digital regulation resistance AD5245.
Single-chip microcomputer P87LPC767 is after energized, gather the timing signal and the power setting signal of external circuit 10 outputs, and move corresponding control programs automatically according to the signal of being gathered, the output reference voltage digital signal, this signal is converted to the output of reference voltage analog signal through digital regulation resistance AD5245, finishes until timing.After timing finishes, the light modulation power that single-chip microcomputer P87LPC767 sets according to the user, same output reference voltage digital signal, this signal is converted to the reference voltage analog signal through digital regulation resistance AD5245, at this moment, this analogue signal generating phase step type sudden change, this mutation voltage is converted to gradual by suppressing circuit 23 to reach set point, correspondingly, the power of high-voltage gas discharging light HID can reach set point soft, reposefully, then with this set point steady operation, till deenergization.The user also can be transferred to rated power with the power of high-voltage gas discharging light HID according to demand.
In conjunction with Fig. 1, described power circuit 60 comprises RFI filter 61, the input termination AC power of RFI filter 61, AC power supplies is through 61 filtering of RFI filter, the output of RFI filter 61 links to each other with full-wave rectifying circuit 62, full-wave rectifying circuit 62 links to each other with APFC circuit 63, APFC circuit 63 links to each other with the input of DC filter 64, the output of DC filter 64 links to each other with the input of semi-bridge inversion Drive and Control Circuit 40, AC power supplies improves vulnerability to jamming through RFI filter 61, through full-wave rectifying circuit 62 alternating current is converted to direct current, improve power factor through APFC circuit 63, for semi-bridge inversion Drive and Control Circuit 40 provides DC power supply, semi-bridge inversion Drive and Control Circuit 40 is converted to high-frequency alternating current output with direct current behind the DC filter filtering.
In conjunction with Fig. 3, described RC oscillating circuit 30 is made up of first resistance R 28 and first capacitor C 9, ground connection after the end parallel connection of the two, the other end links to each other with the input of chip IC 3 in the semi-bridge inversion drive circuit 40 respectively, resistance R 28 connects the 6th pin of chip IC 3, and capacitor C 9 connects the 5th pin of chip IC 3.
In conjunction with Fig. 3, the output of described frequency control circuit 24 links to each other with the input of RC oscillating circuit 30 with the 3rd resistance R 12 by diode in series D1.Frequency control circuit 24 comprises amplifier IC2A, the in-phase input end of amplifier IC2A and resistance R T13 link to each other with node between the capacitor C T5, the inverting input of amplifier IC2A links to each other with collection amplifying circuit 50 by resistance R 19, gathers amplifying circuit 50 and is made up of amplifier IC2C, resistance R 20, R21, capacitor C 12, C13, C14.The output of amplifier IC2A links to each other with the negative pole of diode D1, the anodal connecting resistance R12 of diode D1, and the other end of resistance R 12 links to each other with resistance R 28.In addition, the 1 corresponding A pfc circuit 63 of the chip IC among the figure; Chip IC 3 corresponding semi-bridge inversion Drive and Control Circuit 40 among the figure; Amplifier IC2C among the figure, resistance R 21, capacitor C 14, resistance R 20, capacitor C 13, the capacitor C 12 corresponding amplifying circuits 50 of gathering.
Described semi-bridge inversion Drive and Control Circuit 40 links to each other with high-voltage gas discharging light HID by inductive transformer T, and inductive transformer T connects with high-voltage gas discharging light HID.Amplifier IC2A will suppress circuit 23 reference voltage of exporting and the virtual voltage of being gathered, being amplified by collection amplifying circuit 50 and compare, if virtual voltage is more than or equal to reference voltage, amplifier IC2A output low level, diode D1 conducting, resistance R 12 is in parallel with resistance R 28, the frequency of RC oscillating circuit 30 increases, the frequency of semi-bridge inversion Drive and Control Circuit 40 outputs increases, by Z=2 π fL as can be known, the impedance of the inductance L on the inductive transformer T increases, the dividing potential drop of inductance L increases, and the dividing potential drop of high-voltage gas discharging light HID reduces, power diminishes; If virtual voltage is less than reference voltage, amplifier IC2A exports high level, diode D1 ends, resistance R 12 is not in parallel with resistance R 28, and the frequency of RC oscillating circuit reduces, and the frequency of semi-bridge inversion Drive and Control Circuit 40 outputs reduces, by Z=2 π fL as can be known, the impedance of the inductance L on the inductive transformer T reduces, and the dividing potential drop of inductance L reduces, and the dividing potential drop of high-voltage gas discharging light HID increases, power becomes big.Therefore, the utility model is the acting in conjunction by amplifier IC2A, RC oscillating circuit, semi-bridge inversion Drive and Control Circuit 40, realizes controlling by the frequency of control circuit the purpose of the power of high-voltage gas discharging light HID.
Described frequency control circuit 24, RC oscillating circuit 30, semi-bridge inversion Drive and Control Circuit 40, high-voltage gas discharging light HID and collection amplifying circuit 50 are formed negative feedback loops.When high-voltage gas discharging light HID when rated power is exported, the virtual voltage of the high-voltage gas discharging light HID after gathering amplifying circuit 50 and sampling, amplify equates with its reference voltage, keeps dynamic equilibrium by negative-feedback circuit; After the reference voltage of high-voltage gas discharging light HID changed, frequency control circuit 24 can be controlled the power of high-voltage gas discharging light HID and make corresponding change, equates with reference voltage until its virtual voltage, forms new dynamic equilibrium.
As mentioned above, core of the present utility model is by setting the reference voltage V of high-voltage gas discharging light HID
Ref, the virtual voltage of gathering high-voltage gas discharging light HID inputs to the reference voltage V of amplifier IC2A and high-voltage gas discharging light HID
RefRelatively, the frequency of adjusting RC oscillating circuit 30 according to the signal of telecommunication of amplifier IC2A output is adjusted the variable power of high-voltage gas discharging light HID.In addition, the inhibition circuit 23 in the utility model can be avoided in the process of light modulation scintillation taking place.
Claims (7)
1, a kind of intelligent light adjusting electronic rectifier, it is characterized in that: comprise control circuit (20), the input of control circuit (20) receives the timing signal and the power setting signal of external circuit (10) output, the output of control circuit (20) links to each other with the input of semi-bridge inversion Drive and Control Circuit (40) by RC oscillating circuit (30), AC power supplies links to each other with the input of semi-bridge inversion Drive and Control Circuit (40) by power circuit (60), the output of semi-bridge inversion Drive and Control Circuit (40) links to each other with high-voltage gas discharging light HID by inductive transformer T, and the virtual voltage of gathering amplifying circuit (50) collection high-voltage gas discharging light HID inputs to control circuit (20).
2, intelligent light adjusting electronic rectifier according to claim 1, it is characterized in that: described control circuit (20) comprises single-chip microcomputer (21), the input of single-chip microcomputer (21) links to each other with the output of external circuit (30), the output of single-chip microcomputer (21) links to each other with the input of digital regulation resistance (22), the output of digital regulation resistance (22) links to each other with the input of frequency control circuit (24) by suppressing circuit (23), the output of described collection amplifying circuit (50) links to each other with the input of frequency control circuit (24), and the output of frequency control circuit (24) links to each other with the input of RC oscillating circuit (30).
3, intelligent light adjusting electronic rectifier according to claim 1, it is characterized in that: described RC oscillating circuit (30) is made up of first resistance R 28 and first capacitor C 9, ground connection after the end parallel connection of the two, the other end link to each other with the input of semi-bridge inversion Drive and Control Circuit (40) respectively.
4, intelligent light adjusting electronic rectifier according to claim 2 is characterized in that: described inhibition circuit (23) is made up of the second resistance R T13 and the second capacitor C T5, is connected across on the digital regulation resistance (22) after the two series connection.
5, intelligent light adjusting electronic rectifier according to claim 2, it is characterized in that: described frequency control circuit (24) comprises amplifier IC2A, the in-phase input end of amplifier IC2A and the second resistance R T13 link to each other with node between the second capacitor C T5, the inverting input of amplifier IC2A links to each other with the output of gathering amplifying circuit (50), the output of amplifier IC2A links to each other with the negative pole of diode D1, the positive pole of diode D1 is connected with the 3rd resistance R 12, and the other end of the 3rd resistance R 12 links to each other with first resistance R 28.
6, intelligent light adjusting electronic rectifier according to claim 2 is characterized in that: described frequency control circuit (24), RC oscillating circuit (30), semi-bridge inversion Drive and Control Circuit (40), high-voltage gas discharging light HID and collection amplifying circuit (50) are formed negative feedback loop.
7, intelligent light adjusting electronic rectifier according to claim 1, it is characterized in that: described power circuit (60) comprises RFI filter (61), the input termination AC power supplies of RFI filter (61), the output of RFI filter (61) links to each other with full-wave rectifying circuit (62), full-wave rectifying circuit (62) links to each other with APFC circuit (63), APFC circuit (63) links to each other with the input of DC filter (64), and the output of DC filter (64) links to each other with the input of semi-bridge inversion Drive and Control Circuit (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200308101U CN201153344Y (en) | 2008-01-10 | 2008-01-10 | Intelligent light modulating electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200308101U CN201153344Y (en) | 2008-01-10 | 2008-01-10 | Intelligent light modulating electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201153344Y true CN201153344Y (en) | 2008-11-19 |
Family
ID=40129019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200308101U Expired - Lifetime CN201153344Y (en) | 2008-01-10 | 2008-01-10 | Intelligent light modulating electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201153344Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561531A (en) * | 2013-11-22 | 2014-02-05 | 上海宏源照明电器有限公司 | Electrodeless lamp ballast |
-
2008
- 2008-01-10 CN CNU2008200308101U patent/CN201153344Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561531A (en) * | 2013-11-22 | 2014-02-05 | 上海宏源照明电器有限公司 | Electrodeless lamp ballast |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20081119 Effective date of abandoning: 20080110 |