CN102143642B - High frequency electronic transformer of heavy power UV lamp - Google Patents
High frequency electronic transformer of heavy power UV lamp Download PDFInfo
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- CN102143642B CN102143642B CN 201110103544 CN201110103544A CN102143642B CN 102143642 B CN102143642 B CN 102143642B CN 201110103544 CN201110103544 CN 201110103544 CN 201110103544 A CN201110103544 A CN 201110103544A CN 102143642 B CN102143642 B CN 102143642B
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Abstract
The invention discloses a high frequency electronic transformer of a heavy power UV lamp, which comprises a three-phase full-wave rectifier. The output end of the three-phase full-wave rectifier is connected with a power factor correcting circuit, a full-bridged soft switch circuit, a high frequency converter and a parallel-connection triggering circuit sequentially. The control ends of the power factor correcting circuit and the parallel-connection triggering circuit are also connected with a central processing unit (CPU) controller; the output end of the CPU controller is also connected with a signal modulation circuit and a full-bridge shift phase control circuit; the output end of the signal modulation circuit is connected with the full-bridge shift phase control circuit; the output end of the full-bridge shift phase control circuit is connected with the drive end of the full-bridged soft switch circuit; the input end of the CPU controller is connected with a current feedback signal from the output end of the high frequency converter; and the input end of the full-bridge shift phase control circuit is connected with a current feedback signal from the output end of the power factor correcting circuit. The high frequency electronic converter has advantages of low loss, constant power and stable operation performance.
Description
Technical field
The present invention relates to a kind of transformer, especially a kind of high-power UV lamp high-frequency electronic transformer is widely used in photochemistry fields such as photomechanical process, PS printing down, photoetching, UV curing.
Background technology
High-power UV lamp is widely used in photochemistry fields such as photomechanical process, PS printing down, photoetching, UV curing, is the ideal product of industries such as plate making, flexible package color printing, furniture, plastic cement, printing iron flask, wood floor decoration material, paper glazing.For example in the making of printed circuit board, need to use light-curable ink; In electron trade, adopt the UV lamp as photo solidification machine usually, make object pass through ultraviolet strong illumination by conveyer belt, impel photoresist or photosensitive paint to solidify fast.Existing high-power UV lamp generally adopts the magnetic-leakage type UV transformer of silicon steel sheet and copper cash coiling, and leakage transformer has two kinds of isolated and autocoupling types.The UV ultra-violet lamp is gaseous discharge lamp, fills in quartz burner with high-pressure mercury vapour, and its supply power mode to be to adopt leakage transformer, behind UV lamp build-up of luminance, and must the restricted passage lamp tube current.Isolated and autocoupling type input is two cross streams 380V, output serial connection capacitor.Autocoupling type magnetic-leakage type UV transformer, surge current is big during the energising start, and in order to prevent the impact to fluorescent tube, the reactor of must connecting in circuit is to increase the impedance in the loop.
Traditional magnetic-leakage type UV transformer uses the rich system of silicon steel sheet and copper cash, and volume is big and heavy, and the utmost point is unfavorable for environmental protection and energy-conservation.In the time of normal the use, most voltage drop is added on the reactor, makes the heating of reactor and magnetic-leakage type UV transformer serious, electro-optical efficiency is low, for one 5 kilowatts high-strength ultraviolet UV lamp, and need be greater than 8 kilowatts electric input power, power factor is low, and power consumption is serious.Because use 50 ~ 60Hz power frequency civil power directly to drive high-strength ultraviolet UV fluorescent tube by the back of boosting, spectrum medium ultraviolet luminous intensity is on the low side, infrared light content is higher, the inclined to one side reddish yellow of the light color that causes fluorescent tube to send, and colour temperature is low, and the fluorescent tube heating is serious.Magnetic-leakage type UV transformer does not have permanent power control, when fluorescent tube starts, is negative resistance charactertistic when starting owing to fluorescent tube, makes starting current huge, and huge electric current flows through the UV lamp, influences lamp tube service life, burns fluorescent tube and magnetic-leakage type UV transformer easily.Because do not have permanent power control, in the middle of normal the use, fluorescent tube starts slowly, influenced greatly by utility grid voltage, work was undesired when voltage was low.Magnetic-leakage type UV transformer all adopts the input of two-phase 380V alternating current, can cause the triple line electric current of utility network seriously uneven.
Existing high frequency transformer when working power frequency when being 1KHz to hundreds of KHz, all may produce acoustic resonance.When acoustic resonance takes place when, can make the distortion of discharge arc light or beat, cause unstable, the flicker of light output, even extinguish, more serious meeting is broken fluorescent tube.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of high-frequency electronic transformer is provided, and described high-frequency electronic transformer has that loss is little, the advantage of power invariability, stable work in work.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
High-power UV lamp high-frequency electronic transformer, comprise three-phase full wave rectifier circuit, the output of described three-phase full wave rectifier circuit is connected with circuit of power factor correction in turn, the full-bridge type soft switch circuit, high-frequency converter and circuits for triggering in parallel, the control end of described circuit of power factor correction and circuits for triggering in parallel also is connected with cpu controller, the output of described CUP controller also is connected with signal modulation circuit and bridge Phase shifted PWM Controlled circuit, the output of described signal modulation circuit links to each other with the bridge Phase shifted PWM Controlled circuit, the output of described bridge Phase shifted PWM Controlled circuit is connected with the drive end of full-bridge type soft switch circuit, the input of described cpu controller is connected with the current feedback signal from the output of high-frequency converter, and the input of described bridge Phase shifted PWM Controlled circuit is connected with the current feedback signal from the circuit of power factor correction output.
Be further used as preferred embodiment, described full-bridge type soft switch circuit comprises two identical soft switch circuits, the difference input winding that each soft switch circuit can the same transformer of drive.
Be further used as preferred embodiment, the output frequency of described bridge Phase shifted PWM Controlled circuit is along with cycle, the magnitude of voltage of signal modulation circuit output signal change and change, and frequency range is 29KHz ~ 33.5KHz.
Be further used as preferred embodiment, described circuits for triggering in parallel comprise the startup terminal that excites the startup of UV lamp and the work terminal that drives UV lamp operate as normal, and described startup terminal and work terminal are connected in parallel on the UV fluorescent tube simultaneously.The input side of described startup terminal connects the power frequency high voltage of 50Hz, and the input side of described work terminal is connected with the outlet side of high-frequency converter.
The invention has the beneficial effects as follows: the present invention is by the bridge Phase shifted PWM Controlled circuit, the driving frequency of full-bridge type soft switch circuit is adjusted into periodically variable frequency range, overcome the acoustic resonance defective of high frequency transformer driving UV fluorescent tube, improved the reliability of high frequency transformer; The full-bridge type soft switch circuit adopts the symmetric design of two groups of identical topological structures, has evaded the bias current phenomenon of drive circuit, has saved equal fluid element, has reduced the current-sharing loss, has improved power output; Circuits for triggering in parallel are by the power frequency high voltage starting transformer of 50Hz, and start-up time is short, adopt the HF switch current drives during operate as normal, and UV light color temperature is high, and the fluorescent tube caloric value is low, long service life.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
Fig. 1 is the theory diagram of high-frequency electronic transformer of the present invention;
Fig. 2 is the circuit theory diagrams of circuit of power factor correction in the embodiment of the invention;
Fig. 3 is the circuit theory diagrams of full-bridge type soft switch circuit in the embodiment of the invention;
Fig. 4 is the circuit theory diagrams of embodiment of the invention medium-high frequency converter;
Fig. 5 is the circuit theory diagrams of signal modulation circuit in the embodiment of the invention;
Fig. 6 is the circuit theory diagrams of bridge Phase shifted PWM Controlled circuit in the embodiment of the invention;
Fig. 7 is the circuit theory diagrams of circuits for triggering in parallel in the embodiment of the invention.
Embodiment
With reference to Fig. 1, the high-power UV lamp of the present invention high-frequency electronic transformer, comprise three-phase full wave rectifier circuit 1, the output of described three-phase full wave rectifier circuit 1 is connected with circuit of power factor correction 2 in turn, full-bridge type soft switch circuit 3, high-frequency converter 4 and circuits for triggering in parallel 7, the control end of described circuit of power factor correction 2 and circuits for triggering in parallel 7 also is connected with cpu controller 8, the output of described CUP controller 8 also is connected with signal modulation circuit 5 and bridge Phase shifted PWM Controlled circuit 6, the output of described signal modulation circuit 5 links to each other with bridge Phase shifted PWM Controlled circuit 6, the output of described bridge Phase shifted PWM Controlled circuit 6 is connected with the drive end of full-bridge type soft switch circuit 3, the input of described cpu controller 8 is connected with the current feedback signal from the output of high-frequency converter 4, and the input of described bridge Phase shifted PWM Controlled circuit 6 is connected with the current feedback signal from circuit of power factor correction 2 outputs.
Be further used as preferred embodiment, described full-bridge type soft switch circuit 3 comprises two identical soft switch circuits, the difference input winding that each soft switch circuit can the same transformer of drive.
Be further used as preferred embodiment, the output frequency of described bridge Phase shifted PWM Controlled circuit 6 is along with cycle, the magnitude of voltage of signal modulation circuit 5 output signals change and change, and frequency range is 29KHz ~ 33.5KHz.
Be further used as preferred embodiment, described circuits for triggering 7 in parallel comprise the startup terminal that excites the startup of UV lamp and the work terminal that drives UV lamp operate as normal, and described startup terminal and work terminal are connected in parallel on the UV fluorescent tube simultaneously.The input side of described startup terminal connects the power frequency high voltage of 50Hz, and the input side of described work terminal is connected with the outlet side of high-frequency converter 4.
Composition and function to each circuit unit of the present invention is further described below:
Three-phase full wave rectifier circuit 1 is the pulsating direct current of the 513VDC left and right sides with 380 volts of 50Hz industrial frequency AC electric rectifications that input A, B, C insert;
With reference to Fig. 2, the pulsating direct current signal of 2 pairs of inputs of circuit of power factor correction is through igbt transistor Q1 high frequency chopping, and the low-pass filter circuit filtering of forming via inductance L 1 and capacitor C 1, C2 again changes Voltage pulsating direct-current supply into the DC power supply of 400V burning voltage.This circuit has functions such as voltage stabilizing, overcurrent protection, raising power factor;
With reference to Fig. 3, full-bridge type soft switch circuit 3 adopts two bridge-type soft switch topology structures of enjoying a double blessing that structure is identical, can drive the above high-power UV quartz burner of 12KW.Among Fig. 3, field effect transistor Q1, Q2, Q3, Q4, inductance L 3, capacitor C 3, high frequency transformer TR1 winding N1 constitute a full-bridge type soft switching power circuit, and field effect transistor Q5, Q6, Q7, Q8, inductance L 4, capacitor C 4, high frequency transformer TR1 winding N2 constitute another full-bridge type soft switching power circuit.The bridge soft switch circuit of enjoying a double blessing drives high-frequency converter TR1 simultaneously.
Traditional full-bridge type switching power circuit adopts single group full-bridge type topological structure.High-power if desired output needs the multitube parallel mode.When adopting multitube parallel, for current-sharing, need serial connection high-power resistance or inductance as equal fluid element, all fluid element flows through very big electric current, and all fluid element produces very high heat, has increased consumption.And when the current-sharing effect was undesirable, the pipe that flows through big electric current seriously generated heat.
Originally the bridge-type of enjoying a double blessing soft switch circuit adopts two identical full-bridge circuits, the difference input winding of the same output transformer of each full-bridge drive, and each full-bridge is only born a half-power.Because advantages such as two full-bridge circuit symmetries drive, and do not have the bias current phenomenon, do not need equal fluid element, do not have the current-sharing loss, and working stability is reliable, and power output is big.
With reference to Fig. 4, the effect of high-frequency converter TR1 is that DC power supply is transformed to the 33KHz high-frequency ac power, drives the UV quartz burner of back level.Adopt 2 stacks of Φ 100mm magnet ring in the present embodiment together, the enamelled wire that N1, N2 adopt 0.1*800 to prop up passes magnet ring and makes two input windings around 16 circles, and N3 is that 0.1*1200 props up enamelled wire and passes magnet ring and make the output windings around 30 circles.Above-mentioned parameter only is the high-frequency converter parameter of 12KW fluorescent tube, and during the different capacity fluorescent tube, the magnet ring quantity of employing and external diameter, the winding number of turns are understood different.
With reference to Fig. 5, signal modulation circuit 5 produces the 100Hz square wave by the AT89C2051 programming, forms the 100Hz sawtooth waveforms through resistance R 5, capacitor C 11 integrations, is amplified by operational amplifier U2A, U2B shaping again, and supply back level bridge Phase shifted PWM Controlled circuit 6 is made modulation signal and used.
With reference to Fig. 6, bridge Phase shifted PWM Controlled circuit 6 adopts UC3875, and wherein slide-changing resistor RZ1, capacitor C 14 are set for the RC vibration, regulate slide-changing resistor RZ1 or capacitor C 14 and can change frequency of oscillation.When the 100Hz sawtooth signal is input to the circuit that resistance R 8, capacitor C 8, C12, diode D1 form, can change the capacitance values at capacitor C 14 two ends, this capacitance can change along with cycle of 100Hz sawtooth signal, magnitude of voltage.Therefore, the output frequency of UC3875 bridge Phase shifted PWM Controlled circuit also can be along with cycle of 100Hz sawtooth signal, magnitude of voltage and is changed.The frequency range of this circuit is: 29KHz ~ 33.5KHz.
High-power UV ultra-violet lamp belongs to high-intensity gas discharge lamp, when working power frequency 1KHz when hundreds of KHz, all may produce acoustic resonance.When acoustic resonance takes place when, can make the distortion of discharge arc light or beat, cause unstable, the flicker of light output, even extinguish, more serious meeting is broken fluorescent tube.
Driving output frequency 29KHz ~ 33.5KHz of the design is the cycle by 100Hz namely, drives the out-put supply frequency and constantly changes from 29KHz to 33.5KHz.The energy that produces acoustic resonance in the fluorescent tube is broken up, avoided producing the acoustic resonance phenomenon.
With reference to Fig. 7, circuits for triggering 7 in parallel comprise the startup terminal that excites the startup of UV lamp and the work terminal that drives UV lamp operate as normal, and described startup terminal and work terminal are connected in parallel on the UV fluorescent tube simultaneously.The input side of described startup terminal connects the power frequency high voltage of 50Hz, and the input side of described work terminal is connected with the outlet side of high-frequency converter.During start, send detection signal by cpu controller 8 earlier, relay J K1 per second is connected, is disconnected 3 times, and the 220V AC power is added to stepup transformer TR2 input with pulse mode by capacitor C 3, and check-out console detects stepup transformer TR2 input.If it is normal to detect lamp tube status, cpu controller 8 sends signal makes relay J K1 connect, and stepup transformer TR2 output output 50Hz power frequency high voltage is added in the UV lamp tube ends, makes gas breakdown ionization in the UV fluorescent tube.At this moment, full-bridge type soft switch circuit 3 starts, and drives high-frequency converter 4, and the 400V DC power supply is converted to the 33KHz high frequency voltage.The 33KHz high-frequency current is added to the UV lamp tube ends through capacitor C 1, C2, lights the UV fluorescent tube.After control system detects the UV fluorescent tube operating current is arranged, relay J K1 is disconnected, engage relay JK2, with capacitor C 1, C2 short circuit, the UV fluorescent tube enters normal operating conditions.
High-frequency electronic transformer adopting three-phase 380V of the present invention, the input of 50 ~ 60Hz alternating current, three-phase bridge rectification obtains pulsating direct current; Adopt BUCK PFC power factor correction mode, improve the complete machine power factor; The use high frequency (29 ~ 33KHz) switching currents drive high-strength ultraviolet UV lamp, and spectrum medium ultraviolet luminous intensity is high, and color is blue partially, the colour temperature height, and the fluorescent tube caloric value is low; Adopted permanent power control mode, used low current to start when fluorescent tube starts, fluorescent tube starts fast; Circuit is provided with constant voltage, constant current control, and power keeps constant during operate as normal, is not subjected to the influence of mains fluctuation, has improved the useful life of fluorescent tube greatly.Need not the silicon steel sheet that uses magnetic-leakage type UV transformer to adopt, save a large amount of copper cash than magnetic-leakage type UV transformer, in light weight, volume is little.The DC/AC high-frequency converter is isolated the power supply of output fluorescent tube and the 380V mains supply of input in the circuit, makes operating personnel safer.
More than be that preferable enforcement of the present invention is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art make all equivalent variations or replacement also can doing under the prerequisite of spirit of the present invention, the distortion that these are equal to or replace all is included in the application's claim institute restricted portion.
Claims (5)
1. high-power UV lamp high-frequency electronic transformer, comprise three-phase full wave rectifier circuit (1), the output of described three-phase full wave rectifier circuit (1) is connected with circuit of power factor correction (2) in turn, full-bridge type soft switch circuit (3), high-frequency converter (4) and circuits for triggering in parallel (7), it is characterized in that: the control end of described circuit of power factor correction (2) and circuits for triggering in parallel (7) also is connected with cpu controller (8), the output of described cpu controller (8) also is connected with signal modulation circuit (5) and bridge Phase shifted PWM Controlled circuit (6), the output of described signal modulation circuit (5) links to each other with bridge Phase shifted PWM Controlled circuit (6), the output of described bridge Phase shifted PWM Controlled circuit (6) is connected with the drive end of full-bridge type soft switch circuit (3), the input of described cpu controller (8) is connected with the current feedback signal from the output of high-frequency converter (4), and the input of described bridge Phase shifted PWM Controlled circuit (6) is connected with the current feedback signal from circuit of power factor correction (2) output.
2. high-power UV lamp high-frequency electronic transformer according to claim 1, it is characterized in that: described full-bridge type soft switch circuit (3) comprises two identical soft switch circuits, the difference input winding that each soft switch circuit can the same transformer of drive.
3. high-power UV lamp high-frequency electronic transformer according to claim 1, it is characterized in that: the output frequency of described bridge Phase shifted PWM Controlled circuit (6) is along with cycle, the magnitude of voltage of signal modulation circuit (5) output signal change and change, and frequency range is 29KHz ~ 33.5 KHz.
4. high-power UV lamp high-frequency electronic transformer according to claim 1, it is characterized in that: described circuits for triggering in parallel (7) comprise the startup terminal that excites the startup of UV lamp and the work terminal that drives UV lamp operate as normal, and described startup terminal and work terminal are connected in parallel on the UV fluorescent tube simultaneously.
5. high-power UV lamp high-frequency electronic transformer according to claim 4 is characterized in that: the input side of described startup terminal connects the power frequency high voltage of 50Hz, and the input side of described work terminal is connected with the outlet side of high-frequency converter (4).
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| CN 201110103544 CN102143642B (en) | 2011-04-25 | 2011-04-25 | High frequency electronic transformer of heavy power UV lamp |
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| CN 201110103544 CN102143642B (en) | 2011-04-25 | 2011-04-25 | High frequency electronic transformer of heavy power UV lamp |
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| CN102143642B true CN102143642B (en) | 2013-08-28 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102761271A (en) * | 2011-11-17 | 2012-10-31 | 惠州茂硕能源科技有限公司 | Low standby power loss high-power full-bridge phase shift power supply |
| CN102711348A (en) * | 2012-06-21 | 2012-10-03 | 李立 | UV lamp digital multi-stage drive power supply |
| CN108834291A (en) * | 2018-05-11 | 2018-11-16 | 深圳市百欧森软件技术有限公司 | A kind of integrated rectifier |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86211040U (en) * | 1986-12-29 | 1987-10-28 | *** | Electronic igniter |
| CN1215972A (en) * | 1998-10-05 | 1999-05-05 | 李国础 | Electronic ballast for high-pressure discharge lamp |
| US6984964B2 (en) * | 2003-07-28 | 2006-01-10 | Delta Electronics Inc. | Soft-switching three-phase power factor correction converter |
| CN101102078A (en) * | 2007-08-02 | 2008-01-09 | 哈尔滨工业大学 | Three-phase single-level power factor correction circuit based on full bridge structure |
| CN101259557A (en) * | 2007-08-10 | 2008-09-10 | 湖南超宇科技有限公司 | Embedded system operated digitalization soft switch inversion arc welder |
-
2011
- 2011-04-25 CN CN 201110103544 patent/CN102143642B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86211040U (en) * | 1986-12-29 | 1987-10-28 | *** | Electronic igniter |
| CN1215972A (en) * | 1998-10-05 | 1999-05-05 | 李国础 | Electronic ballast for high-pressure discharge lamp |
| US6984964B2 (en) * | 2003-07-28 | 2006-01-10 | Delta Electronics Inc. | Soft-switching three-phase power factor correction converter |
| CN101102078A (en) * | 2007-08-02 | 2008-01-09 | 哈尔滨工业大学 | Three-phase single-level power factor correction circuit based on full bridge structure |
| CN101259557A (en) * | 2007-08-10 | 2008-09-10 | 湖南超宇科技有限公司 | Embedded system operated digitalization soft switch inversion arc welder |
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Effective date of registration: 20160222 Address after: Good South Guangzhou city in Guangdong province 510110 room 6D No. 50 Patentee after: Kansonic Technology Ltd. Address before: Good South Guangzhou city in Guangdong province 510110 room 6D No. 50 Patentee before: Liu Muquan |