CN109982495A - A kind of pre- heater circuit - Google Patents
A kind of pre- heater circuit Download PDFInfo
- Publication number
- CN109982495A CN109982495A CN201711466792.1A CN201711466792A CN109982495A CN 109982495 A CN109982495 A CN 109982495A CN 201711466792 A CN201711466792 A CN 201711466792A CN 109982495 A CN109982495 A CN 109982495A
- Authority
- CN
- China
- Prior art keywords
- circuit
- capacitor
- pressure sodium
- low
- sodium lamp
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/2881—Load circuits; Control thereof
-
- 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
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
A kind of pre- heater circuit of the present invention includes by filtering and rectification circuit, circuit of power factor correction, preheating and drive control and protection circuit, high frequency half bridge inverter circuit, low-pressure sodium lamp start-up circuit composition, electric main is after filtering and rectification, through circuit of power factor correction, preheating and drive control and protection circuit, high frequency half bridge inverter circuit and low-pressure sodium lamp start-up circuit is set to work, low-pressure sodium lamp is preheated and is done work, circuit is protected to obtain output voltage signal from high frequency half bridge inverter circuit, drive control circuit is sent to after processing, drive control circuit controls power output according to the voltage signal of output, to ensure pipeline start up by preheating and the stable operation of electronic ballast for low pressure sodium lamp.
Description
Technical field
The present invention relates to illuminator ballast technical field, espespecially a kind of pre- heater circuit.
Background technique
Low-pressure sodium lamp is also a kind of efficient lamp kind for substituting high-pressure sodium lamp using electricity wisely, and what low-pressure sodium lamp issued is monochromatic yellows
Light is that light decay is smaller and the highest artificial light sources of light efficiency now, for the photochromic place not required, but its " mist transmitting "
Show very outstanding, particularly suitable for highway, traffic route, town road, park, garden illumination, it is clear to make one
See the smaller object of color difference in ground.Pre- heater circuit gradually replaces frequency inductance formula ballast, into the practical commercialization stage,
Pre- heater circuit is superior to inductance ballast in control performance, operation characteristic, economic benefit and Costco Wholesale, and low-pressure sodium lamp is distinctive
Structure and performance, to pre- heater circuit circuit, more stringent requirements are proposed, the existing pre- heater circuit circuit of low-pressure sodium lamp, using power
MOSFET pipe half-bridge driven mode, service life depend greatly on the job stability of integrated chip, but its
The Starting mode that works uses simple power supply power supply mode, does not have pre- heat function, performance requirement is often not achieved.
Summary of the invention
A kind of pre- heater circuit circuit of low-pressure sodium lamp of the present invention, it is characterised in that be directed to above-mentioned deficiency, a kind of work is provided
Stablize, has the function of the pre- heater circuit circuit of low-pressure sodium lamp of pipeline start up by preheating, overcurrent-overvoltage lamp abnormity protection function.
To achieve the goals above, technical solution of the invention are as follows: a kind of pre- heater circuit includes by filtering and rectifying
Circuit, circuit of power factor correction, preheating and drive control and protection circuit, high frequency half bridge inverter circuit, low-pressure sodium lamp starting
Circuit composition, filtering and rectification circuit are connect with external ac power source, filtering and rectification circuit, circuit of power factor correction, drive
Dynamic control circuit and power output circuit are sequentially connected in series, and high frequency half bridge inversion start-up circuit is connected with low-pressure sodium lamp start-up circuit
It connects.
The filtering and rectification circuit is made of cartridge fuse FU, capacitor C1 and diode D1~D4.
The circuit of power factor correction by integrated chip U1, Industrial Frequency Transformer T1, resistance R1~R11, capacitor C2~
C7 and electrolytic capacitor C8~C9, power MOSFET tube Q1, zener diode D5 and diode D6~D8 are constituted, and have pressure stabilizing
Function.
The preheating and drive control and protection circuit is by integrating U2, zener diode D9, diode D10~D11, electricity
It hinders R12~R16, electrolytic capacitor C10, power MOSFET tube Q4, inductance L2 and capacitor C11~C15 to constitute, pre- heat function is utilized and opened
The powered-down mode for holding C12 and C14 parallel connection, is realized by the switch of power MOSFET tube Q4.
The high frequency half bridge inverter circuit by resistance R17 and R18, power MOSFET tube Q2 and Q3 and diode D12 and
D13 is constituted.
The low-pressure sodium lamp start-up circuit is made of inductance L1, capacitor C16 and C17.
The beneficial effects of the present invention are: electric main is converted into direct current after filtering and rectification, direct current through power because
Number correcting circuit makes high frequency half bridge inverter circuit and low-pressure sodium lamp start-up circuit by preheating and drive control and protection circuit
Work preheats low-pressure sodium lamp and does work, and protection circuit obtains output voltage signal from high frequency half bridge inverter circuit, sends out after processing
It send to drive control circuit, drive control circuit controls power output according to the voltage signal of output, to ensure low pressure
The pipeline start up by preheating of the pre- heater circuit of sodium vapor lamp and stable operation.
Detailed description of the invention
The present invention is further described with reference to the accompanying drawings and detailed description.
Attached drawing is circuit diagram of the invention.
Specific embodiment
As shown in the picture: a kind of pre- heater circuit includes by filtering and rectification circuit, circuit of power factor correction, preheating and drive
It is dynamic to control and protect circuit, high frequency half bridge inverter circuit, low-pressure sodium lamp start-up circuit composition, filtering and rectification circuit and outside friendship
The connection of galvanic electricity source, filtering and rectification circuit, circuit of power factor correction, drive control circuit and power output circuit are successively gone here and there
Connection, high frequency half bridge inversion start-up circuit are connected with low-pressure sodium lamp start-up circuit.The filtering and rectification circuit is by fuse
Pipe FU, capacitor C1 and diode D1~D4 are constituted；Circuit of power factor correction is by integrated chip U1, Industrial Frequency Transformer T1, resistance
R1~R11, capacitor C2~C7 and electrolytic capacitor C8~C9, power MOSFET tube Q1, zener diode D5 and diode D6~D8
It constitutes, and there is voltage stabilizing function；Preheating and drive control and protection circuit are by integrating U2, zener diode D9, diode D10
~D11, resistance R12~R16, electrolytic capacitor C10, power MOSFET tube Q4, inductance L2 and capacitor C11~C15 are constituted, pre- hot merit
It can be realized in the way of switching capacity C12 and C14 parallel connection by the switch of power MOSFET tube Q4；High frequency half bridge inversion
Electric routing resistance R17 and R18, power MOSFET tube Q2 and Q3 and diode D12 and D13 are constituted；Low-pressure sodium lamp start-up circuit is
It is made of inductance L1, capacitor C16 and C17.
Diode D1~D4 constitutes rectifier bridge, and the contact of diode D2 and D4 connect power ground, the contact of diode D1 and D3
Be connected respectively with the primary coil N1 of capacitor C1, resistance R3 and R4 and Industrial Frequency Transformer T1, the other end of primary coil N1 with
The source electrode of power MOSFET tube Q1 is connected, and by diode D8 respectively with electrolytic capacitor C9, resistance R8, R12 and power
The source electrode of MOSFET pipe Q2 is connected, and the end VCC of another termination integrated chip U1 of resistance R3 simultaneously passes through electrolytic capacitor C8 and capacitor
C4 connects power ground, and the end MULT of another termination integrated chip U1 of resistance R4 simultaneously connects power supply by resistance R5 and capacitor C2 respectively
The secondary coil N2 on ground, Industrial Frequency Transformer T1 is connected with resistance R1 and R2, another termination power ground of secondary coil N2, resistance R2
Another termination integrated chip U1 the end ZCD, pass through diode D6 and pressure stabilizing after another termination capacitor C3 of resistance R1 respectively again
Diode D5 connects the end VCC and the power ground of integrated chip U1, and resistance R6 is connected to capacitor C7 respectively again after connecting with capacitor C6
Between the end COMP and the end INV of integrated chip U1, the end INV is connected with the other end of resistance R8 respectively and connects power supply by resistance R9
Ground, the end GD passes through diode D5 respectively and resistance R7 is connected with the grid of power MOSFET tube Q1, and the end CS passes through resistance R10 respectively
It is connected with capacitor C5 with the drain electrode of power MOSFET tube Q1 and power ground, the drain electrode of power MOSFET tube Q1 is connect by resistance R11
Power ground, the end pin VCC of another termination integrated chip IC2 of resistance R12, inductance L2, diode D10, capacitor C13, resistance
The U2 working power of R14, zener diode D9 and electrolytic capacitor C10 composition powers to the end VCC through resistance R14, and the end VCC leads to respectively
It crosses zener diode D9 and electrolytic capacitor C10 and diode D11 connects power ground and connect with the end VB, the both ends difference of capacitor C11
It is connected to the end VB and the end VS, the both ends of resistance R13 are connected to the end RT and the end CT respectively, and the end CT passes through capacitor C16 and capacitor C12 respectively again
It is connected with the source electrode of power MOSFET tube Q4 and power ground, the drain electrode at the end GND and power MOSFET tube Q4 connects power ground respectively,
The grid of power MOSFET tube Q4 connects capacitor C15, resistance R15 and R16, another termination power of resistance R15 and capacitor C15 respectively
Ground, the end another termination LO of resistance R16, the end LO passes through the grid of diode D13 and resistance R18 and power MOSFET tube Q3 respectively
It is connected, the end HO passes through diode D12 respectively and resistance R17 is connected with the grid of power MOSFET tube Q2, power MOSFET tube Q2
Drain electrode be connected with the source electrode of Q3 and be followed by the end VS, capacitor C16 is connected with the end VS, and the other end of capacitor C16 is connected with inductance L1,
The other end of inductance L1 meets low-pressure sodium lamp pipe LAMP and capacitor C17 respectively, the other end of low-pressure sodium lamp pipe LAMP and capacitor C17's
The other end connects power ground.
Electric main is converted into direct current after filtering and rectification, and direct current passes through resistance through circuit of power factor correction
R12 charges to capacitor C10, and when reaching starting voltage, integrated chip U2 is worked normally, and generates PWM wave and carrys out driving power MOSFET
Pipe Q2 and Q3 are allowed on and off in turn, the square-wave signal that duty ratio is about 50%, by inductance L2, diode D10, capacitor
The U2 working power that C13, resistance R14, zener diode D9 and electrolytic capacitor C10 are formed powers to the end VCC through resistance R14,
Before low-pressure sodium lamp starting, since the inert gas filled in low-pressure sodium lamp electric arc tube is unvaporized, so low-pressure sodium lamp is in suitable
High impedance state, it is believed that low-pressure sodium lamp is in open-circuit condition, and the mode of switching capacity C12 and C14 parallel connection passes through small letter
The switching of the switch control oscillating capacitance of number power MOSFET tube Q4, changes frequency of oscillation from high to low, to realize from pre-
Process of the heat to triggering；In half-bridge LC resonance converter, series resonant capacitance C16 and resonant capacitance C17 are electric with resonance together
L1 resonance under AC power source driving is felt, to generate high voltage at low-pressure sodium lamp both ends；In the half-bridge LC resonance of steady operation
In converter, series resonant capacitance C16 and resonant inductance L1 power under AC power source driving for lamp load, provide steady operation
Required modulating voltage and lamp current passes through the by-pass current of very little in parallel resonance capacitor C17；Protect circuit from high frequency half bridge
Inverter circuit obtains output voltage signal, is sent to drive control circuit after processing, and drive control circuit is according to the voltage of output
Signal controls power output.
The above, embodiment is only that preferred embodiments of the present invention will be described, not to of the invention
Range is defined, and under the premise of not departing from the spirit of the technology of the present invention, this field engineers and technicians are to skill of the invention
The various changes and improvements that art scheme is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (2)
1. a kind of pre- heater circuit, it is characterized in that: the pre- heater circuit includes by filtering and rectification circuit, PFC electricity
Road, preheating and drive control and protection circuit, high frequency half bridge inverter circuit, low-pressure sodium lamp start-up circuit composition, filtering and rectification
Circuit is connect with external ac power source, filtering and rectification circuit, circuit of power factor correction, drive control circuit and power output
Circuit is sequentially connected in series, and high frequency half bridge inversion start-up circuit is connected with low-pressure sodium lamp start-up circuit.
2. a kind of pre- heater circuit according to claim 1, it is characterized in that: the filtering and rectification circuit are by cartridge fuse
FU, capacitor C1 and diode D1~D4 are constituted；The circuit of power factor correction by integrated chip U1, Industrial Frequency Transformer T1,
Resistance R1~R11, capacitor C2~C7 and electrolytic capacitor C8~C9, power MOSFET tube Q1, zener diode D5 and diode D6
~D8 is constituted；The preheating and drive control and protection circuit by integrated U2, zener diode D9, diode D10~D11,
Resistance R12~R16, electrolytic capacitor C10, power MOSFET tube Q4, inductance L2 and capacitor C11~C15 are constituted；The high frequency half
Bridge inverter circuit is made of resistance R17 and R18, power MOSFET tube Q2 and Q3 and diode D12 and D13；The low pressure sodium
Lamp start-up circuit is made of inductance L1, capacitor C16 and C17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711466792.1A CN109982495A (en) | 2017-12-28 | 2017-12-28 | A kind of pre- heater circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711466792.1A CN109982495A (en) | 2017-12-28 | 2017-12-28 | A kind of pre- heater circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109982495A true CN109982495A (en) | 2019-07-05 |
Family
ID=67075430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711466792.1A Pending CN109982495A (en) | 2017-12-28 | 2017-12-28 | A kind of pre- heater circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109982495A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110582153A (en) * | 2019-08-01 | 2019-12-17 | 福建睿能科技股份有限公司 | Driving circuit, driving method thereof and electronic ballast |
-
2017
- 2017-12-28 CN CN201711466792.1A patent/CN109982495A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110582153A (en) * | 2019-08-01 | 2019-12-17 | 福建睿能科技股份有限公司 | Driving circuit, driving method thereof and electronic ballast |
| CN110582153B (en) * | 2019-08-01 | 2022-04-01 | 福建睿能科技股份有限公司 | Driving circuit, driving method thereof and electronic ballast |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190705 |
|
| WD01 | Invention patent application deemed withdrawn after publication |