CN203399380U - Light adjustable and constant power ballast for electrodeless lamp - Google Patents
Light adjustable and constant power ballast for electrodeless lamp Download PDFInfo
- Publication number
- CN203399380U CN203399380U CN201320318671.3U CN201320318671U CN203399380U CN 203399380 U CN203399380 U CN 203399380U CN 201320318671 U CN201320318671 U CN 201320318671U CN 203399380 U CN203399380 U CN 203399380U
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal generator
- output
- error amplifier
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
The utility model provides a light adjustable and constant power ballast for an electrodeless lamp. The light adjustable and constant power ballast comprises a PFC circuit, a half-bridge circuit, a load coupling circuit and the electrodeless lamp which are connected in sequence. The light adjustable and constant power ballast also comprises a current sampling circuit, a current amplification circuit, an error amplifier, a 0-10 V light modulation circuit, a high frequency signal generator, a PWM signal generator and a half-bridge control circuit. The output terminal of the PFC circuit is connected to the inverting terminal of the error amplifier through the current sampling circuit and the current amplification circuit in sequence; an input terminal of the 0-10 V light modulation circuit is connected with a light modulator, and an output terminal of the 0-10 V light modulation circuit is connected with the non-inverting terminal of the error amplifier; the 0-10 V light modulation circuit is provided with an input terminal to be connected with the high frequency signal generator; and the output terminal of the error amplifier is connected with the half-bridge circuit through the PWM signal generator and the half-bridge control circuit in sequence. The light adjustable and constant power ballast is advantageous in that the structure is simple, light modulation and constant power precision is high, and the light modulation scope is wide.
Description
Technical field
The utility model relates to a kind of Non-polarized lamp control field, refers in particular to the permanent power electronic ballast for electrodeless lamp of a kind of tunable optical.
Background technology
Non-polarized lamp is as electric light source of new generation, has that the life-span is long, efficiency is high, without advantages such as stroboscopics, is a kind of green light source being extensively received by the market.The quality of supporting electric ballast performance is directly connected to job stability and the useful life of Non-polarized lamp with it.
Because light modulation can further reduce unnecessary energy loss, so the dimming function of electronic ballast of electrodeless lamp is also a study hotspot.Traditional light-dimming method mainly contains and is divided into DC side and two kinds of light modulation methods of inversion side.DC side is to realize by changing the input direct voltage mode of inverter; AC is to realize by changing the operating frequency of inverter.Due to the difference of circuit topology and control method, the efficiency that realizes effect and circuit of light modulation, complexity are also different.
For the light-dimming method that changes frequency, after frequency is increased to a certain degree, because the discharge performance of lamp sharply changes, cause lamp power with frequency to change very greatly, frequency increases a bit a little, lamp power will sharply reduce, and cause light flash or extinguish, and along with frequency increases, lamp current reduces, modulating voltage increases, switching tube may enter hard switching operating state, and switching loss sharply increases, and reliability reduces.Therefore adopt PFM light modulation, on a large scale light modulation.
The electronic ballast of electrodeless lamp that has power factor correction for prime, the input direct voltage dimming mode that changes inverter is realized by changing PFC output voltage.In order to expand dimming scope, need to adopt the circuit of buck to realize power factor correction, but there is the shortcomings such as switch tube voltage current stress is large, circuit efficiency is low, EMI is large in the circuit of buck, and dimming scope is limited by the soft Switching Condition of switching tube also, permanent power is realized difficulty etc., and practicality is not strong.
Moreover, it is larger that the power stage of the Non-polarized lamp of adjusting when light modulation is subject to ambient temperature, the parameter of electrodeless lamp tube own, the parameter discrete of components and parts, the temperature characterisitic of components and parts etc. must affect variation, power excessive or too small useful life that all may affect illuminating effect and lamp, and along with the lamp passing of service time, voltage of both ends of lamp can change, and makes the useful life that light output is unstable and reduce Non-polarized lamp.Therefore need to carry out permanent power control to Non-polarized lamp.
Summary of the invention
The technical problems to be solved in the utility model, is to provide a kind of tunable optical permanent power electronic ballast for electrodeless lamp, and simple in structure, light modulation and permanent power precision are high, and dimming scope is wide, and the life-span is long.
The utility model is achieved in that the permanent power electronic ballast for electrodeless lamp of a kind of tunable optical, comprises the pfc circuit, a half-bridge circuit, a load matching circuit and the Non-polarized lamp that join successively; The permanent power electronic ballast for electrodeless lamp of described tunable optical also comprises a current sampling circuit, a current amplification circuit, an error amplifier, a 0-10V light adjusting circuit, a high frequency signal generator, a pwm signal generator and half bridge control circuit; The output of described pfc circuit is connected with the input of described current sampling circuit; The output of described current sampling circuit is connected with the input of described current amplification circuit; The output of described current amplification circuit is connected in the end of oppisite phase of described error amplifier; The input of described 0-10V light adjusting circuit connects a dimmer, and the output of this 0-10V light adjusting circuit and the in-phase end of described error amplifier are connected; Described 0-10V light adjusting circuit is provided with a high-frequency signal input, and this high-frequency signal input is connected with the output of described high frequency signal generator; The output of described error amplifier is connected with the input of described pwm signal generator; Described pwm signal generator is connected with described half-bridge circuit by described half bridge control circuit.
Preferably, described half bridge control circuit comprises one for controlling the control end of this half bridge control circuit internal oscillator work; The output of described pwm signal generator is connected with described control end.
The utility model has the advantage of: by by the output current of pfc circuit and 0-10V light adjusting circuit output signal for the regulating Non-polarized lamp power output duty ratio in conjunction with co-controlling pwm signal generator output pulse, thereby control, half-bridge circuit is opened continuously pulse signal in one-period and continuous ratio of turn-offing pulse signal is controlled power output, realizing light modulation and the permanent power of Non-polarized lamp controls, simple in structure, brightness adjustment control accurately and stable output power, reliability is high, long service life.
Accompanying drawing explanation
The utility model is further described with reference to the accompanying drawings in conjunction with the embodiments.
Fig. 1 is the circuit structure block diagram of the permanent power electronic ballast for electrodeless lamp of a kind of tunable optical of the utility model.
Fig. 2 is the control signal schematic diagram of the permanent power electronic ballast for electrodeless lamp of a kind of tunable optical of the utility model in a preferred embodiment.
Embodiment
Refer to shown in Fig. 1 and Fig. 2, the permanent power electronic ballast for electrodeless lamp 100 of a kind of tunable optical, comprises the pfc circuit 1, a half-bridge circuit 2, a load matching circuit 3 and the Non-polarized lamp 4 that join successively; The permanent power electronic ballast for electrodeless lamp 100 of described tunable optical also comprises that a current sampling circuit 5, a current amplification circuit 6, an error amplifier 7, a 0-10V light adjusting circuit 8, a high frequency signal generator 9, a pwm signal generator 10 and are for controlling half bridge control circuit 11 of described half-bridge circuit 2 work; The output of described pfc circuit 1 is connected with the input of described current sampling circuit 5; The output of described current sampling circuit 5 is connected with the input of described current amplification circuit 6; The output of described current amplification circuit 6 is connected in the end of oppisite phase 71 of described error amplifier 7; The input of described 0-10V light adjusting circuit 8 connects one for regulating the dimmer 12 of described pwm signal generator 10 output signal duty ratios, and the output of this 0-10V light adjusting circuit 8 is connected with the in-phase end 72 of described error amplifier 7; Described 0-10V light adjusting circuit 8 is provided with a high-frequency signal input, and this high-frequency signal input is connected with the output of described high frequency signal generator 9; The output of described error amplifier 7 is connected with the input of described pwm signal generator 10; Described pwm signal generator 10 is connected with described half-bridge circuit 2 by described half bridge control circuit 11.According to dimmer 12, regulate 0-10V light adjusting circuit 8, and 0-10V light adjusting circuit 8 output signals are exported to the in-phase end 72 of error amplifier 7; And by current sampling circuit 5, detect the output current of pfc circuit 1, and after current amplification circuit 6 amplifies, export this output current the end of oppisite phase 71 of error amplifier 7 to; Again the output signal of error amplifier 7 is produced to the pwm signal of required duty ratio through pwm signal generator 10, control the output pulse of half bridge control circuit 11, the drive pulse signal of half-bridge circuit 2 is become with pwm signal duty ratio intermittently used pulse signal, the ratio of opening continuously pulse signal (being the operating time) by pwm signal in one-period and turn-offing continuously pulse signal (being dwell time) is controlled power output (see figure 2), thereby light modulation and the permanent power of realizing Non-polarized lamp are controlled; Wherein, described half bridge control circuit 11 can be that any is for controlling the control chip of described half-bridge circuit 2 work; Simple in structure, and accurately power ratio control and light modulation; In addition, high frequency signal generator 9 is independent to be arranged, and for 0-10V light adjusting circuit 8 provides stable high-frequency signal, has compared high frequency signal generator 9 is arranged to the traditional structure on pfc circuit 1, more can effectively avoid dimming behavior to be subject to the impact of line voltage.Described half bridge control circuit 11 comprise one for control this half bridge control circuit internal oscillator work control end; The output of described pwm signal generator 10 is connected with described control end.By pwm signal generator 10, control the operating state of oscillator in half bridge control circuit 11, when extinguishing, lamp closes oscillator, lamp restarting process keeps operating frequency constant, thereby has reduced the starting resistor of lamp in light modulation process, and then makes half-bridge circuit 2 keep soft switch working state.
The utility model is when application, pass through dimmer, 0-10V light adjusting circuit, current sampling circuit and error amplifier regulate the duty ratio of pwm signal generator output pulse, control half bridge control circuit, the structure that adopts impulse train to control by the switch to half-bridge circuit, in one-period, by controlling the ratio (duty ratio) of opening continuously pulse signal and turn-offing continuously pulse signal, control power output, reach the object of power adjustments, inverter is born inversion and two tasks of power adjustments, greatly simplified circuit structure, device for power switching is operated in soft on off state, switching loss and switch noise have greatly been reduced.
Although more than described embodiment of the present utility model; but being familiar with those skilled in the art is to be understood that; our described specific embodiment is illustrative; rather than for the restriction to scope of the present utility model; those of ordinary skill in the art are in equivalent modification and the variation done according to spirit of the present utility model, all should be encompassed in the scope that claim of the present utility model protects.
Claims (2)
1. the permanent power electronic ballast for electrodeless lamp of a tunable optical, comprise the pfc circuit, a half-bridge circuit, a load matching circuit and the Non-polarized lamp that join successively, it is characterized in that: the permanent power electronic ballast for electrodeless lamp of described tunable optical also comprises a current sampling circuit, a current amplification circuit, an error amplifier, a 0-10V light adjusting circuit, a high frequency signal generator, a pwm signal generator and half bridge control circuit; The output of described pfc circuit is connected with the input of described current sampling circuit; The output of described current sampling circuit is connected with the input of described current amplification circuit; The output of described current amplification circuit is connected in the end of oppisite phase of described error amplifier; The input of described 0-10V light adjusting circuit connects a dimmer, and the output of this 0-10V light adjusting circuit and the in-phase end of described error amplifier are connected; Described 0-10V light adjusting circuit is provided with a high-frequency signal input, and this high-frequency signal input is connected with the output of described high frequency signal generator; The output of described error amplifier is connected with the input of described pwm signal generator; Described pwm signal generator is connected with described half-bridge circuit by described half bridge control circuit.
2. the permanent power electronic ballast for electrodeless lamp of a kind of tunable optical as claimed in claim 1, is characterized in that: described half bridge control circuit comprises one for controlling the control end of this half bridge control circuit internal oscillator work; The output of described pwm signal generator is connected with described control end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320318671.3U CN203399380U (en) | 2013-06-04 | 2013-06-04 | Light adjustable and constant power ballast for electrodeless lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320318671.3U CN203399380U (en) | 2013-06-04 | 2013-06-04 | Light adjustable and constant power ballast for electrodeless lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203399380U true CN203399380U (en) | 2014-01-15 |
Family
ID=49910873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320318671.3U Expired - Lifetime CN203399380U (en) | 2013-06-04 | 2013-06-04 | Light adjustable and constant power ballast for electrodeless lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203399380U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115734428A (en) * | 2022-12-28 | 2023-03-03 | 威海中远海运重工科技有限公司 | Constant-power stepless dimming control system |
| CN115734428B (en) * | 2022-12-28 | 2024-05-31 | 威海中远海运重工科技有限公司 | Constant-power electrodeless dimming control system |
-
2013
- 2013-06-04 CN CN201320318671.3U patent/CN203399380U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115734428A (en) * | 2022-12-28 | 2023-03-03 | 威海中远海运重工科技有限公司 | Constant-power stepless dimming control system |
| CN115734428B (en) * | 2022-12-28 | 2024-05-31 | 威海中远海运重工科技有限公司 | Constant-power electrodeless dimming control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2013140391A (en) | DEVICE AND METHOD FOR MATCHING INPUT SIGNAL FOR CONTROL OF LIGHT POWER REGULATION WITH A DRIVER OF LIGHTING WITH REGULATION OF LIGHT POWER WITH ELECTRICAL INSULATION | |
| US10085312B2 (en) | Bus bar current control circuit, constant-current driving controller and LED light source | |
| JP2010200321A (en) | Pulse width modulation control device | |
| CN103139990A (en) | Light-adjustable light-emitting diode (LED) driving power | |
| CN204465954U (en) | A kind of LED lamp drive circuit with dimming function | |
| WO2012024383A3 (en) | Method of controlling an operating frequency of an inverter circuit in an electronic dimming ballast | |
| CN203206508U (en) | Novel LED lamp driving circuit | |
| CN105636308A (en) | Wireless remote-control LED dimming light source | |
| CN101742796B (en) | Filament preheating circuit and electronic ballast | |
| CN205546103U (en) | Flyback drive circuit | |
| CN203399380U (en) | Light adjustable and constant power ballast for electrodeless lamp | |
| Wang et al. | Electronic ballast for metal halide lamps using a quasi-resonant inverter with digital control | |
| CN101022690B (en) | Electronic ballast | |
| US8569968B2 (en) | Method for adjusting light brightness using a toggle switch and related illuminant system | |
| CN102612195B (en) | LED (light emitting diode) constant current driving circuit and LED lamp using same | |
| CN203399385U (en) | Light adjustable ballast for electrodeless lamp | |
| CN201957308U (en) | Dimmable light emitting diode (LED) constant-current drive circuit | |
| CN208273304U (en) | A kind of LED control device | |
| CN204465952U (en) | A kind of LED energy-saving circuit based on MSP430 | |
| CN202455634U (en) | Electronic ballast of electrodeless lamp | |
| CN201403243Y (en) | Cold-cathode light-adjusting lamp | |
| CN202551438U (en) | Light-load control structure for power source using LLC (logical link control) topology | |
| KR20080079131A (en) | Driving control apparatus and method | |
| US7224592B2 (en) | Multi-period cycle-alternative switching mode power supply control device and its control method | |
| CN216852427U (en) | Dimming circuit for non-isolated LED constant current driving power supply and illumination control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |