CN102932998B - Power converter - Google Patents
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- CN102932998B CN102932998B CN201210453141.XA CN201210453141A CN102932998B CN 102932998 B CN102932998 B CN 102932998B CN 201210453141 A CN201210453141 A CN 201210453141A CN 102932998 B CN102932998 B CN 102932998B
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- power supply
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- changeover device
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Abstract
The invention discloses a power converter. On the basis of an existing power converter circuit, a load characteristic match circuit is added, and meanwhile a dual voltage rectifying filter circuit and a constant-current output circuit are adopted. A current continuation circuit in the load characteristic match circuit enables an electronic transformer connected with the converter to maintain certain small current input when output of the electronic transformer is close to the lowest value. A current balance resistor in the load characteristic match circuit enables the electronic transformer to limit charging current in a filter capacitor in the dual voltage rectifying filter circuit when the electronic transformer outputs the alternating current peak value, and when the alternating current peak value outputted by the electronic transformer passes, certain charging current for the filter capacitor is maintained. By means of the load characteristic match circuit, the load characteristic of a light emitting diode (LED) lamp connected with the power converter is close to the load characteristic of the electronic transformer, and therefore the phenomena that LED spots are not lightened, flicker and are extremely low in brightness caused by the fact that the LED lamp is connected with the electronic transformer are avoided, and the power converter is applied to transformers of different types.
Description
Technical field
The invention belongs to electric lighting technical field, relate to a kind of power supply changeover device and LED lamp, be specifically related to a kind of power supply changeover device for the LED light source of transferring.
Background technology
Large power, electrically source converter in the market, is that the low pressure of halogen lamp cup electronic transformer is exported to the rectifying and wave-filtering that boosts, then carries out constant current driving, to high-powered LED lamp group, powers.The patent No. is that 201090000531.6 utility model discloses a kind of power supply changeover device and a kind of LED lamp, its circuit comprises EMI filter circuit, voltage multiplying rectifier filter circuit and constant current output circuit, when halogen lamp cup electronic transformer is exported the alternating current of 6V～12V, it is the more than 2 times direct current of input voltage that electric current forms voltage after EMI filter circuit and voltage multiplying rectifier filter circuit, and this direct current direct current that step-down is 6V～12V again after by constant current output circuit is supplied with LED lamp.Because power supply changeover device does not mate with electronic transformer, the load characteristic of LED lamp is different with the load characteristic of electronic transformer, causes this quasi-driver when supporting the use with existing electronic transformer, there will be a little do not work, flicker, the extremely low phenomenon of brightness.
Summary of the invention
For above-mentioned prior art, the technical problem to be solved in the present invention is to provide a kind of applicable dissimilar transformer, and overcome that traditional LED lamp appearance point does not work, the power supply changeover device of flicker, the extremely low phenomenon of brightness.
For solving the problems of the technologies described above, by the following technical solutions of the present invention:
A kind of power supply changeover device, this power supply changeover device is connected with prime transformer, rear class LED lamp group respectively, described power supply changeover device comprises voltage multiplying rectifier filter circuit, constant current output circuit, described voltage multiplying rectifier filter circuit comprises two filter capacitors of series connection mutually, the low pressure output of prime transformer is through the voltage multiplying rectifier filter circuit rectifying and wave-filtering that boosts, then by constant current output circuit, carries out constant current and drive rear class LED lamp group to power; This power supply changeover device also comprises the load characteristic match circuit being comprised of electric current continuity circuit and current balance type resistance; Wherein, described electric current continuity circuit is arranged between the output of prime transformer and the input of voltage multiplying rectifier filter circuit, when the alternating current of exporting for prime transformer approaches low ebb, keeps power supply changeover device to have certain electric current input; Described current balance type resistance is connected with the input of described voltage multiplying rectifier filter circuit, limits voltage multiplying rectifier filter circuit filter capacitor charging current for the alternating current in prime transformer output during at peak value.
As improvement of the present invention, described electric current continuity circuit consists of full bridge rectifier, the 6th resistance, the 7th resistance, the 8th electric capacity.After described the 6th resistance, the 7th resistance and the 8th electric capacity are parallel with one another, be connected with two brachium pontis mid points of described full bridge rectifier.
As improvement of the present invention, the transformer that the input of described load characteristic match circuit connects is electronic transformer.
As improvement of the present invention, the transformer that the input of described load characteristic match circuit connects is linear transformer.
As the present invention, further improve, described voltage multiplying rectifier filter circuit comprises two filter capacitors of series connection mutually, and described filter capacitor is electrochemical capacitor.
As further improvement of the present invention, this power supply changeover device also comprises the rear utmost point filter capacitor that is connected in parallel on constant current output circuit output.
The beneficial effect that the present invention has is:
On the basis of existing converter circuitry of power, input at voltage multiplying rectifier filter circuit connects load characteristic match circuit, electric current continuity circuit in this load characteristic match circuit can make electronic transformer when output approaches low ebb, keeps power supply changeover device to have certain small electric stream input; The effect of the current balance type resistance in this load characteristic match circuit is filter capacitor charging current limit voltage multiplying rectifier filter circuit when the alternating current peak value of electronic transformer output in, do not allow filter capacitor charging current excessive, the alternating current peak value past tense in electronic transformer output also can keep the charging current certain to filter capacitor like this.By electric current, continue circuit and the acting in conjunction of current balance type resistance, the load characteristic of the LED lamp that power supply changeover device connects approaches the load characteristic of electronic transformer, thereby while avoiding LED lamp connecting electronic transformer, occur that LED point does not work, flicker, the extremely low phenomenon of brightness, make the power supply changeover device of this invention be applicable to dissimilar transformer.In voltage multiplying rectifier filter circuit, filter capacitor adopts two jumbo electrochemical capacitor filtering, and this driver has rear class filter capacitor simultaneously, under the filter action of dual large bulk capacitance, efficiently solves the stroboscopic problem of LED lamp.
Accompanying drawing explanation
Fig. 1 is power supply changeover device module map;
Fig. 2 is converter circuitry of power figure.
Embodiment
For further setting forth the present invention, reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
The present embodiment is not change in the circuit wiring structure situation of former halogen lamp cup, utilizes the low pressure output of former halogen lamp cup electronic transformer to drive LED lamp group.This driver is that the output voltage of traditional halogen lamp cup electronic transformer is changed, and directly drives 1 ~ 5 great power LED.
As shown in Figure 2, a kind of power supply changeover device, this power supply changeover device is connected with prime Halogen Lamp Electronic Transformer, rear class LED lamp group respectively.Power supply changeover device comprises voltage multiplying rectifier filter circuit 10, constant current output circuit 20, voltage multiplying rectifier filter circuit 10 comprises filter capacitor, the low pressure output of prime Halogen Lamp Electronic Transformer is through voltage multiplying rectifier filter circuit 10 rectifying and wave-filtering that boosts, then by constant current output circuit 20, carries out constant current and drive rear class LED lamp group to power.This power supply changeover device also comprises the load characteristic match circuit 30 being comprised of electric current continuity circuit 301 and current balance type resistance 302; Wherein, electric current continuity circuit 301 is arranged between the output of prime Halogen Lamp Electronic Transformer and the input of voltage multiplying rectifier filter circuit 10, when the alternating current of exporting for prime Halogen Lamp Electronic Transformer approaches low ebb, keep power supply changeover device to have certain electric current input.Current balance type resistance 302 is connected with the input of described voltage multiplying rectifier filter circuit 10, limits the charging current of voltage multiplying rectifier filter circuit filter capacitor for the alternating current in prime Halogen Lamp Electronic Transformer output during at peak value.
The voltage multiplying rectifier filter circuit 10 of power supply changeover device is by diode D1, D2, D3, D4, and electrochemical capacitor C1, C2 and capacitor C 3 form.The anode of diode D1 and the negative electrode of diode D4 are connected the first input end of this voltage multiplying rectifier filter circuit 10 jointly, the anode of diode D2 and diode D3 negative electrode be jointly connected the second input of this voltage multiplying rectifier filter circuit 10.The negative electrode of diode D1 negative electrode and diode D2 is connected the positive pole of electrochemical capacitor C2 and one end of capacitor C 3 jointly, and the anode of diode D3 and diode D4 is connected the negative pole of electrochemical capacitor C1 and the other end of capacitor C 3 extremely jointly.The negative pole of the positive pole of electrochemical capacitor C1 and electrochemical capacitor C2 is connected the second input of this voltage multiplying rectifier filter circuit 10 jointly.The first output of voltage multiplying rectifier filter circuit 10 and the second output are connected to the two ends of capacitor C 3.Wherein, electrochemical capacitor C1, C2 capacity are 470uF, and withstand voltage is 35V.This circuit play to the alternating voltage of output carry out that multiplication of voltage is boosted, rectification and filter action.
The constant-current driven chip U1 that the constant current output circuit 20 of power supply changeover device is XL8002 by model, resistance R 2, R3, R4, R5, capacitor C 5, inductance L 1, diode D5 and NPN type three utmost point Q1 pipes form.The 3rd pin of constant-current driven chip U1 is connected with one end of resistance R 2, R3, connects the first output of voltage multiplying rectifier filter circuit 10 simultaneously.The other end of the collector electrode contact resistance R3 of the Q1 of NPN type triode, the other end of base stage contact resistance R2 of triode Q1 and the first pin of constant-current driven chip U1.The 4th pin that connects constant-current driven chip U1 after the second pin of the emitter connection constant-current driven chip U1 of triode Q1 series capacitance C5.Resistance R 4, R5 are connected in parallel, one end of resistance R 4 connects the 5th pin of constant-current driven chip U1 and the negative electrode of diode D5, the other end of resistance R 4 connects one end of inductance L 1 and connects the 4th pin of constant-current driven chip U1, the other end of inductance L 1 connects the first output of constant current output circuit 10, the second output of the anodic bonding constant current output circuit of diode D5.
This power supply changeover device also comprises the rear utmost point filter capacitor C6 that is connected in parallel on driver output end; This rear utmost point filter capacitor C6 is that capacity is 47uF, and withstand voltage is the electrochemical capacitor of 50V.
As shown in Figure 2, load characteristic match circuit 30 comprises electric current continuity circuit 301 and current balance type resistance R 1.Electric current continuity circuit 301 consists of full bridge rectifier, resistance R 6, R7, capacitor C 8.Full bridge rectifier is comprised of diode D6, D7, D8, D9, the first input end of the anodic bonding load characteristic match circuit 30 of the negative electrode of diode D6 and diode D9; The second input of the anodic bonding load characteristic match circuit 30 of the negative electrode of diode D7 and diode D8.Resistance R 6, R7 and capacitor C 8 are connected in parallel between the anodic bonding node of diode D6, D7 and the negative electrode connected node of diode D6, D7 of full bridge rectifier.
In load characteristic match circuit 30, one end of current balance type resistance R 1 connects the first input end of this power supply changeover device, and the other end of current balance type resistance R 1 connects the first input end of voltage multiplying rectifier filter circuit 10.
When this power supply changeover device input connects the high-frequency alternating current of Halogen Lamp Electronic Transformer output, electric current, after voltage multiplying rectifier filter circuit, is gone into the stable DC electricity that voltage is higher and is supplied with constant current output circuit.The direct current of high voltage becomes the burning voltage that adapts to LED work after constant-current driven chip, outputs to the LED lamp group two ends that are connected with power supply changeover device.
Input at voltage multiplying rectifier filter circuit connects load characteristic match circuit 30, electric current continuity circuit 301 in this load characteristic match circuit 30 can make halogen lamp cup electronic transformer when output approaches low ebb, keeps power supply changeover device to have certain small electric stream input.The effect of the current balance type resistance R 1 in this load characteristic match circuit 30 is filter capacitor charging current limit voltage multiplying rectifier filter circuit 10 when the alternating current peak value of halogen lamp cup electronic transformer output in, do not allow filter capacitor charging current excessive, the alternating current peak value past tense in the output of halogen lamp cup electronic transformer also can keep the charging current certain to filter capacitor like this.By electric current, continue the acting in conjunction of circuit 301 and current balance type resistance R 1, the load characteristic of the LED lamp that power supply changeover device connects approaches the load characteristic of Halogen lamp LED, thereby while avoiding LED Lamp cup for halogen lamp cup, occur that LED point does not work, flicker, the extremely low phenomenon of brightness, make the power supply changeover device of this invention be applicable to dissimilar halogen lamp cup.In voltage multiplying rectifier filter circuit 10, filter capacitor adopts the electrochemical capacitor filtering of 2 470uF, the filter capacitor of this driver output end parallel connection adopts the electrochemical capacitor filtering of 47uF, under the filter action of dual large bulk capacitance, efficiently solve the stroboscopic problem of LED Lamp cup.
The power supply changeover device that the present embodiment provides is first converted to direct voltage by the high-frequency ac voltage of the output high voltage of electronic transformer, after the step-down of step-down constant-current driven chip, forming voltage is the stable DC electricity of 0 ~ 20V, and the constant current driving force of 5 LEDs series connection 450mA left and right is provided.This driver has 1 ~ 5 great power LED 450mA power and is greater than the constant current driving force of 7W, and has 1 ~ 5 great power LED constant current driving force and output short circuit protection function.
Power supply changeover device input of the present invention can also connect the linear transformer that output voltage is 5V-20V.
By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned execution mode, in the ken possessing those of ordinary skills, can also depart under the prerequisite of aim of the present invention and make various variations.
Claims (5)
1. a power supply changeover device, this power supply changeover device is connected with prime transformer, rear class LED lamp group respectively, described power supply changeover device comprises voltage multiplying rectifier filter circuit (10), constant current output circuit (20), described voltage multiplying rectifier filter circuit (10) comprises filter capacitor, the low pressure output of prime transformer is through voltage multiplying rectifier filter circuit (10) rectifying and wave-filtering that boosts, then by constant current output circuit (20), carries out constant current and drive the power supply of rear class LED lamp group; It is characterized in that: this power supply changeover device also comprises the load characteristic match circuit (30) being comprised of electric current continuity circuit (301) and current balance type resistance (302); Wherein,
Described electric current continuity circuit (301) is arranged between the output of prime transformer and the input of voltage multiplying rectifier filter circuit (10), and the alternating current of exporting for prime transformer, when low ebb, keeps power supply changeover device to have electric current input; Described electric current continuity circuit (301) consists of full bridge rectifier, the 6th resistance (R6), the 7th resistance (R7), the 8th electric capacity (C8); After described the 6th resistance (R6), the 7th resistance (R7) and the 8th electric capacity (C8) are parallel with one another, be connected with two brachium pontis mid points of described full bridge rectifier;
Described current balance type resistance (302) is connected with the input of described voltage multiplying rectifier filter circuit (10), limits the charging current of voltage multiplying rectifier filter circuit filter capacitor for the alternating current in prime transformer output during at peak value.
2. power supply changeover device according to claim 1, is characterized in that: the transformer that the input of described load characteristic match circuit (30) connects is electronic transformer.
3. power supply changeover device according to claim 1, is characterized in that: the transformer that the input of described load characteristic match circuit (30) connects is linear transformer.
4. power supply changeover device according to claim 1, is characterized in that: described voltage multiplying rectifier filter circuit (10) comprises two filter capacitors of series connection mutually, and described filter capacitor is electrochemical capacitor.
5. power supply changeover device according to claim 1, is characterized in that: this power supply changeover device also comprises the rear utmost point filter capacitor that is connected in parallel on constant current output circuit (20) output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210453141.XA CN102932998B (en) | 2012-11-13 | 2012-11-13 | Power converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210453141.XA CN102932998B (en) | 2012-11-13 | 2012-11-13 | Power converter |
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| CN102932998A CN102932998A (en) | 2013-02-13 |
| CN102932998B true CN102932998B (en) | 2014-09-17 |
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| CN201210453141.XA Expired - Fee Related CN102932998B (en) | 2012-11-13 | 2012-11-13 | Power converter |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105491722A (en) * | 2015-12-31 | 2016-04-13 | 吴文武 | LED autotransformer driver |
| CN107612371A (en) * | 2017-09-19 | 2018-01-19 | 杭州欧佩捷科技有限公司 | Full-bridge Capacitance Coupled inputs AC DC converters and its transform method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201541371U (en) * | 2009-10-30 | 2010-08-04 | 深圳市九洲光电子有限公司 | LED spotlight drive circuit for MR16 |
| CN201550319U (en) * | 2009-11-06 | 2010-08-11 | 林文献 | High power LED lighting precision driver |
| CN102080779A (en) * | 2010-12-03 | 2011-06-01 | 上海嘉塘电子有限公司 | Efficient energy-saving type LED (light emitting diode) straight pipe lamp |
| CN201893981U (en) * | 2010-12-16 | 2011-07-06 | 慈溪明鑫照明科技有限公司 | Light-emitting diode (LED) spotlight drive circuit |
| CN202455626U (en) * | 2012-02-22 | 2012-09-26 | 上海登芯微电子科技有限公司 | LED (light emitting diode) spotlight driving power supply |
| CN102769982A (en) * | 2012-07-18 | 2012-11-07 | 东莞市领冠半导体照明有限公司 | MR16 power supply adapted to all halogen lamp transformers |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4996462A (en) * | 1988-07-27 | 1991-02-26 | Siemens Aktiengesellschaft | Electronic ballast for fluoroscent lamps |
| US6700331B2 (en) * | 2002-06-05 | 2004-03-02 | Lusa Lighting, Inc. | Control circuit for dimming fluorescent lamps |
| CN101483947A (en) * | 2009-02-20 | 2009-07-15 | 黄斌 | Power source converter for halogen tungstem lamp switching energy saving lamp |
| CN201398262Y (en) * | 2009-04-23 | 2010-02-03 | 深圳市兴皓地电子有限公司 | Drive circuit of low-voltage alternating current fluorescent lamp |
| CN102647838A (en) * | 2012-04-26 | 2012-08-22 | 永康市普发科技有限公司 | Conversion module of electronic ballast-driven LED (light emitting diode) |
| CN102711339A (en) * | 2012-06-21 | 2012-10-03 | 深圳市耀星光电子有限公司 | LED (Light Emitting Diode) drive circuit |
-
2012
- 2012-11-13 CN CN201210453141.XA patent/CN102932998B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201541371U (en) * | 2009-10-30 | 2010-08-04 | 深圳市九洲光电子有限公司 | LED spotlight drive circuit for MR16 |
| CN201550319U (en) * | 2009-11-06 | 2010-08-11 | 林文献 | High power LED lighting precision driver |
| CN102080779A (en) * | 2010-12-03 | 2011-06-01 | 上海嘉塘电子有限公司 | Efficient energy-saving type LED (light emitting diode) straight pipe lamp |
| CN201893981U (en) * | 2010-12-16 | 2011-07-06 | 慈溪明鑫照明科技有限公司 | Light-emitting diode (LED) spotlight drive circuit |
| CN202455626U (en) * | 2012-02-22 | 2012-09-26 | 上海登芯微电子科技有限公司 | LED (light emitting diode) spotlight driving power supply |
| CN102769982A (en) * | 2012-07-18 | 2012-11-07 | 东莞市领冠半导体照明有限公司 | MR16 power supply adapted to all halogen lamp transformers |
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Owner name: ZHENJIANG LEDIAN SEMICONDUCTOR TECHNOLOGY CO., LTD Free format text: FORMER OWNER: ZHENJIANG LUMINOUZ LIGHTING CO., LTD. Effective date: 20140808 |
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Effective date of registration: 20140808 Address after: 212127 Zhenjiang City, Jiangsu province Dantu District Valley Township Tower Road No. 3 Applicant after: Zhenjiang Le electricity semiconductor Science and Technology Ltd. Address before: 212009 Zhenjiang City, Jiangsu Province Economic Development Zone Five Road No. 2 Applicant before: Zhenjiang Luminouz Lighting Co., Ltd. |
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