CN201854494U - Constant-power control electronic ballast of HID (high intensity discharge) lamp - Google Patents
Constant-power control electronic ballast of HID (high intensity discharge) lamp Download PDFInfo
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- CN201854494U CN201854494U CN2010206167602U CN201020616760U CN201854494U CN 201854494 U CN201854494 U CN 201854494U CN 2010206167602 U CN2010206167602 U CN 2010206167602U CN 201020616760 U CN201020616760 U CN 201020616760U CN 201854494 U CN201854494 U CN 201854494U
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- power control
- hid
- electronic ballast
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The utility model belongs to the field of electronic ballasts and particularly relates to a constant-power control electronic ballast of an HID (high intensity discharge) lamp. The constant-power control electronic ballast comprises a voltage-reducing converter, a circuit of the constant-power control electronic ballast comprises a voltage-reducing switch adjuster, the output end of the voltage-reducing converter is provided with an output voltage sampling circuit, and the input end of the voltage-reducing converter is provided with an inductive current signal sampling circuit; the output voltage sampling circuit and the inductive current signal sampling circuit are connected with a cathode of a comparator by a signal superposition circuit, and an anode of the comparator is grounded by an serially-connected capacitor; and the signal output end of the comparator is connected in series with a latch to form a current mode pulse width modulator, and the signal output end of the latch is connected with a control circuit of the voltage-reducing switch adjuster. A firing circuit comprises a high-voltage transformer, the high-voltage side of the high-voltage transformer is connected in series with an HID lamp tube, and the low-voltage side of the high-voltage transformer is connected in series with a high-voltage trigger diode and a resonance capacitor to form a parallel branch of the HID lamp tube. The constant-power control electronic ballast has high conversion efficiency, the circuit of the electronic ballast is simple, and light output of the HID lamp is stable.
Description
[technical field]
The utility model belongs to the electric ballast field, more particularly, relates to a kind of HID lamp and decides power control electric ballast.
[background technology]
The hyperbar charging source is because gas-discharge current density is big, luminosity is high, be referred to as high-intensity gas discharge lamp (High Intensity Discharge Lamp traditionally, be called for short the HID lamp), be widely used in the indoor and outdoor lighting environment such as square, harbour, workshop, road, in current illuminator, occupy an important position.Have plurality of advantages such as light efficiency height, life-span long (can reach 10000h), power bracket are wide.The HID lamp is widely used in the world at present high efficiency light source of new generation, and last year, only metal halide bulb, the high-pressure sodium lamp of China's production reached 1,480 ten thousand.And along with capital construction continues to increase, the consumption of HID lamp all can have bigger growth every year, so the electric accessories that the supporting HID lamp of appropriate design is used is very important, and uses electric ballast can obtain the good ratio of performance to price.
Electric ballast has obvious energy-saving effect, can realize various automatic controls very simply, realizes the intellectuality control to light, can satisfy the may command requirement of illumination, can save a large amount of electric power simultaneously.
Figure 1 shows that HID lamp electronic ballast block diagram commonly used at present, this circuit comprises 6 parts.A. filter rectifier: AC power is converted to DC power supply.B. boost converter: the power factor (PF) that improves electric ballast.C. step-down controller (buck): control light tube electric voltage, electric current or power.D. the full-bridge type direct current is to a-c transducer: provide low-frequency square-wave to drive the HID lamp, avoid the problem of audio frequency resonance.E. firing circuit: the ignition voltage that 3~4kV is provided.F. integrated circuit microcontroller: the control electric ballast also provides defencive function.
Have for the normal method that adopts of the control of HID lamp electronic ballast at present: decide voltage control, decide Current Control, reach and decide power control.The pluses and minuses of these control methods are summarized as follows:
1. decide voltage control: circuit design is easy, but when fluorescent tube is aging, the light of HID output slump of disastrous proportions.
2. decide Current Control: circuit design is easy, and the light output of HID lamp is stable.But when fluorescent tube was aging, the power output of electric ballast can increase, and has influence on the reliability of electric ballast.
3. decide power control: the light output of HID lamp is stable, but complex circuit designs.Utilize little processing reason device can realize deciding power control, but cost is higher, is unfavorable for promoting the use of.In addition, the feedback signal that has the researcher to propose to utilize operation amplifier circuit to obtain approximate power of lamp tube realizes deciding power control, but when fluorescent tube was aging, this decided the power mode poor effect.
[utility model content]
Technical problem to be solved in the utility model is to provide a kind of power control electric ballast of deciding, and simplifies and decides power control circuit, wishes to promote by this designed capacity of HID lamp electronic ballast, improves the electronics energy use efficiency.
The technical solution of the utility model is: the HID lamp is decided power control electric ballast, comprise step-down controller, comprise step-down switching regulator and firing circuit in its circuit, described step-down controller output is established output voltage sampling circuit, and its input is established the inductor current signal sample circuit; Described output voltage sampling circuit is connected by the negative pole of superimposed signal circuit with a comparator with the inductor current signal sample circuit, and described comparator is anodal by a serial connection capacity earth; Described comparator signal output is connected in series with a latch, constitutes current mode pulse width modulator, and described latch signal output is connected with the step-down switching regulator control circuit.
Feature of the present utility model also is to comprise firing circuit, described firing circuit comprises a high-tension transformer, described high-tension transformer high-pressure side is connected in series with the HID fluorescent tube, and its low-pressure side is connected in series the parallel branch that constitutes described HID fluorescent tube with a high pressure diac and a resonant capacitance.
The utility model advantage is: circuit is simple, the conversion efficiency height, and the light output of HID lamp is stable.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is a circuit of electronic ballast schematic diagram commonly used at present,
Fig. 2 is the power control circuit circuit theory diagrams of deciding of the present utility model,
Fig. 3 is the power control circuit key waveforms figure that decides of the present utility model,
Fig. 4 is a firing circuit schematic diagram of the present utility model.
[embodiment]
Referring to Fig. 2, among the figure schematic diagram that the HID electric ballast lamp of 70W is decided power control circuit, can be used for driving various HID lamp.Comprise step-down switching regulator S in its control circuit, described step-down controller output is established output voltage sampling circuit, and its input is established the inductor current signal sample circuit; Described output voltage sampling circuit and inductor current signal sample circuit form current sense control signal V by the stack of superimposed signal circuit ∑
Pcs, being transported to the negative pole of comparator, described comparator is anodal by a serial connection capacity earth; Described comparator signal output is connected in series with a latch, constitutes current mode pulse width modulator, and described latch signal output is connected with the control circuit of step-down switching regulator S.Describedly decide power control circuit and be connected with boost converter by tie point A, G1, be connected with full-bridge inverter with G2 by tie point B.
Its characteristic is as follows:
Wide AC-input voltage: 108V~305V, 50/60Hz
Lamp power output: 70W
Step-down controller switching frequency: 50kHz
Full-bridge inverter switching frequency: 50Hz
Step-down controller inductance L: 593 μ H
Output voltage gain K
v: 1.24 * 10
-3
Inductor current signal gain K
i: 0.43
Boost converter controller: L6561
Full-bridge inverter controller: UBA2032T
Referring to Fig. 2, and comparator among the figure and latch formation current mode pulse width modulator (Pulse-WidthModulation, PWM), its current sense control signal V
PcsForm by the stack of superimposed signal circuit ∑ by inductor current signal and step-down controller output voltage signal.Inductor current signal changes with the step-down output voltage signal, makes power output keep stable.Inductor current signal is obtained by the small resistor sampling of series connection, and signal gain is K
i, the step-down output voltage signal obtains by electric resistance partial pressure and through capacitor filtering, and signal gain is Kv.Because step-down controller be operated in discontinuous conduction mode (DiscontinuousConduction Mode, DCM), inductive current shows as sawtooth waveform, and the step-down controller output voltage feedback signal becomes direct current signal, key waveforms is as shown in Figure 3.
For simplifying the analysis, suppose the output voltage V of boost converter
BusIt is exactly the input voltage of step-down controller.Because the duty ratio of full-bridge inverter working point is 50%, so full-bridge inverter and HID lamp can be used as resistance and handle.The power loss of ignoring full-bridge inverter, the power output of step-down controller just equals the power output of lamp.That is to say that current sensing signal is along with the step-down controller output signal with respect to inductor current signal level shift has taken place.So, by this signal V
PcsWith reference signal P
PrefComparison, make duty ratio V
gBe Controlled has reached the purpose that power output is controlled.When the impedance of lamp changes, the step-down controller output voltage V.Also change.Therefore, the level of current sensing signal will be changed, to adjust the duty ratio V of step-down switching S
g, design suitable inductor current signal gain K
iWith output voltage signal gain K
v, decide power output control and just realized.
Firing circuit: as shown in Figure 4, the igniter part in the corresponding diagram 1 in the lamp driving stage has the tie point C and the D of two correspondences, and described firing circuit comprises a high-tension transformer TR
Ig, described high-tension transformer TR
IgThe high-pressure side be connected in series its low-pressure side and a high pressure diac D with the HID fluorescent tube
IgAnd resonant capacitance C
IgSerial connection constitutes the parallel branch of described HID fluorescent tube.
Measurement result shows that the total current harmonic distortion of the utility model electric ballast meets the IEC standard less than 10%, and energy use efficiency is better than 90%.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that under the situation that does not break away from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is limited by claims and equivalent thereof.
Claims (2)
1.HID lamp is decided power control electric ballast, comprise step-down controller, comprise step-down switching regulator and firing circuit in its circuit, it is characterized in that: described step-down controller output is established output voltage sampling circuit, and its input is established the inductor current signal sample circuit; Described output voltage sampling circuit is connected by the negative pole of superimposed signal circuit with a comparator with the inductor current signal sample circuit, and described comparator is anodal by a serial connection capacity earth; Described comparator signal output is connected in series with a latch, constitutes current mode pulse width modulator, and described latch signal output is connected with the step-down switching regulator control circuit.
2. decide power control electric ballast according to the described HID lamp of claim 1, it is characterized in that: described firing circuit comprises a high-tension transformer, described high-tension transformer high-pressure side is connected in series with the HID fluorescent tube, and its low-pressure side is connected in series the parallel branch that constitutes described HID fluorescent tube with a high pressure diac and a resonant capacitance.
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CN2010206167602U CN201854494U (en) | 2010-11-22 | 2010-11-22 | Constant-power control electronic ballast of HID (high intensity discharge) lamp |
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CN2010206167602U CN201854494U (en) | 2010-11-22 | 2010-11-22 | Constant-power control electronic ballast of HID (high intensity discharge) lamp |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102905453A (en) * | 2011-07-26 | 2013-01-30 | 台达电子企业管理(上海)有限公司 | Gas discharge lamp driving circuit system and control method thereof |
CN106132053A (en) * | 2016-07-22 | 2016-11-16 | 杭州士兰微电子股份有限公司 | The control circuit of high-voltage gas discharging light, control method and drive circuit |
US10847969B2 (en) | 2018-06-04 | 2020-11-24 | Chicony Power Technology Co., Ltd. | Constant power protection circuit and constant power protection method |
-
2010
- 2010-11-22 CN CN2010206167602U patent/CN201854494U/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102905453A (en) * | 2011-07-26 | 2013-01-30 | 台达电子企业管理(上海)有限公司 | Gas discharge lamp driving circuit system and control method thereof |
CN102905453B (en) * | 2011-07-26 | 2014-11-26 | 台达电子企业管理(上海)有限公司 | Gas discharge lamp driving circuit system and control method thereof |
CN106132053A (en) * | 2016-07-22 | 2016-11-16 | 杭州士兰微电子股份有限公司 | The control circuit of high-voltage gas discharging light, control method and drive circuit |
US10847969B2 (en) | 2018-06-04 | 2020-11-24 | Chicony Power Technology Co., Ltd. | Constant power protection circuit and constant power protection method |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20131122 |