CN204231697U - A kind of three-phase electricity rectification LC height PF filtering high direct voltage directly drives LED circuit - Google Patents
A kind of three-phase electricity rectification LC height PF filtering high direct voltage directly drives LED circuit Download PDFInfo
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- CN204231697U CN204231697U CN201420458295.2U CN201420458295U CN204231697U CN 204231697 U CN204231697 U CN 204231697U CN 201420458295 U CN201420458295 U CN 201420458295U CN 204231697 U CN204231697 U CN 204231697U
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Abstract
The utility model discloses a kind of three-phase electricity rectification LC height PF filtering high direct voltage and directly drive LED circuit, by three-phase full wave rectifier circuit, the LC high-pressure filter circuit of high PF, normal bright LED electronic circuit, the compositions such as several grades of controlled LED electronic circuits; Three-phase alternating-current obtains comparatively ideal high direct voltage through the LC high-pressure filter circuit filtering of high PF again through three phase full wave rectification gained alternating current-direct current ripple high pressure, under the control of directly driving integrated circuit, this high direct voltage directly drives LED, and several grades of controlled LED electronic circuits control by directly driving LED integrated circuit; When the transient voltage of current sampling resistor is less than a certain threshold voltage, integrated circuit is by LED electronic circuit load short circuits; When the transient voltage of current sampling resistor is equal to or greater than a certain threshold voltage, this LED electronic circuit load accesses by this integrated circuit; This technology has that power supply conversion efficiency is high, power factor is high, current ripples is little, light stroboscopic resistant performance is good, reliability is high, low cost and other advantages.
Description
Technical field
The utility model belongs to electronic applications, is specifically related to a kind of three-phase electricity rectification LC height PF filtering high direct voltage and directly drives LED circuit.
Background technology
Light-emitting diode (LED) has energy-efficient outstanding advantages as a kind of luminescent device of new generation, constantly replaces conventional lighting technology and extensive use.Compared with Switching Power Supply driving LED technology, single phase alternating current (A.C.) civil power directly drives LED technology and has the high feature of reliability.Compared with directly driving LED technology with single phase alternating current (A.C.), three-phase electricity is directly driven LED technology and is had the advantages such as driving voltage is high, electric current is little, electric wire cost, is particularly suitable for the high-power LED (Light Emitting Diode) road illuminatings such as street lamp.For this technology, the utility model people has obtained china national practical new-type patent " three-phase alternating current conversion high direct voltage directly drives the road lighting circuit of LED " (patent No.: ZL 201420013866.1).But existing three-phase electricity electricity directly drive LED technology be by three-phase electricity after full-wave rectification gained alternating current-direct current high pressure with regard to Direct driver LED, not after filtering, the voltage ripple of its alternating current-direct current high pressure is greater than 13%, the current ripples of LED is quite large, optical frequency sudden strain of a muscle problem is still more serious, even can affect road traffic safety in some cases.Directly drive LED technology for three-phase electricity, the optical frequency problem of dodging how thoroughly overcoming LED has extremely important using value.The optical frequency of LED problem of dodging is that the electric current and voltage ripple of driving LED causes, for common three phase rectifier filtering technique, applying high voltage electric capacity directly carries out filtering to rectification high pressure, electric current and voltage ripple can be reduced easily thus overcome optical frequency to dodge, but there is a serious technical problem in it, namely the power factor PF of driving power can be caused greatly to reduce, the index request of high-power LED lamp to PF can not be met, directly must drive LED technology by the specialized designs three-phase of researching and developing high PF.The utility model proposes a kind of Three phase electric rectification LC height PF filtering high direct voltage and directly drive LED circuit, the LC filter circuit applying the high PF of special inductance L and high-voltage capacitance C composition carries out filtering to three phase rectifier high pressure, power factor PF is greater than 0.95, its voltage ripple can be less than 0.1%, the current ripples of LED can be less than 1%, not only thoroughly can overcome optical frequency and dodge problem, this technology also has driving power conversion efficiency up to 95% simultaneously, high reliability, because the drive current of LED is bordering on ideal DC under these technical conditions simultaneously, to drive or compared with the obvious LED Driving technique of current ripples with interchange, light efficiency significantly improves.This utility model to thoroughly overcome LED drive interchange optical frequency dodge problem, improve LED light efficiency, ensure high power factor, reduce high-power LED street lamp illumination cost significant, there are good economic results in society.
Utility model content
In order to overcome the defect existed in prior art, the utility model provides a kind of three-phase electricity rectification LC height PF filtering high direct voltage directly to drive LED circuit, and concrete technical scheme is as follows:
A kind of three-phase electricity rectification LC height PF filtering high direct voltage directly drives LED circuit, comprises three-phase full wave rectifier circuit, LC high-pressure filter circuit, normal bright LED electronic circuit and controlled LED circuit; Wherein, three-phase full wave rectifier circuit comprises three three-phase alternating current electrical inputs Vin1, Vin2, Vin3, and rectification high-voltage output end VH and reference ground end GND;
LC high-pressure filter circuit comprises inductance L and high-voltage capacitance C, inductance L and high-voltage capacitance C series connection, one end of inductance L connects rectification high-voltage output end VH, one end of high-voltage capacitance C connects with reference to ground end GND, and the common port of inductance L and high-voltage capacitance C is the DC high-voltage output end VHD of LC high-pressure filter circuit;
Or, LC high-pressure filter circuit comprises inductance L, first high-voltage electrolytic capacitor C1, second high-voltage electrolytic capacitor C2, first discharge resistance R1 and the second discharge resistance R2, one end of inductance L connects rectification high-voltage output end VH, the other end of inductance L connects the positive pole of the first high-voltage electrolytic capacitor C1 and one end of the first discharge resistance R1 respectively, the negative pole of the first high-voltage electrolytic capacitor C1 connects the positive pole of the second high-voltage electrolytic capacitor C2 and one end of the second discharge resistance R2 respectively, the negative pole of the second high-voltage electrolytic capacitor C2 is connected with reference to ground end GND with the other end of the second discharge resistance R2, the other end of the first discharge resistance R1 connects the positive pole of the second high-voltage electrolytic capacitor C2, the common port of inductance L, the first high-voltage electrolytic capacitor C1 and the first discharge resistance R1 is the DC high-voltage output end VHD of LC high-pressure filter circuit,
Normal bright LED electronic circuit comprises the LED of one group of series aiding connection, and the electric current of normal bright LED electronic circuit flows into end and is connected with DC high-voltage output end VHD;
Controlled LED circuit comprises the controlled LED electronic circuit of some series connection, and the electric current of controlled LED circuit flows into end and is connected with the outflow of bus current end of normal bright LED electronic circuit, and the outflow of bus current end of controlled LED circuit holds GND to be connected with reference to ground.
Further, controlled LED electronic circuit comprise single-stage control directly drive LED integrated circuit U, current sampling resistor Rs and LED group; It is that special straight drives LED integrated circuit that single-stage controls directly to drive LED integrated circuit U, comprises switch control rule port U1, current sample port U2 and zero potential reference port U3; LED group comprises the LED of some series aiding connections; Wherein,
The electric current of LED group flows into end and is connected with switch control rule port U1, the outflow of bus current end of LED group is connected with one end of current sample port U2 and current sampling resistor Rs respectively, the other end of current sampling resistor Rs is connected with zero potential reference port U3, is the outflow of bus current end of controlled LED electronic circuit;
In controlled LED circuit, the zero potential reference edge of previous stage LED electronic circuit flows into hold with the electric current of rear stage LED electronic circuit and is connected, and afterbody LED electronic circuit zero potential reference edge U3 holds GND to be connected with reference to ground.
In addition, controlled LED circuit also comprises Multistage Control multi output and directly drives LED integrated circuit Um and current sampling resistor Rs, Um are that special straight drives LED integrated circuit, comprises M switch control rule port Um1, Um2 ... UmM, and zero potential reference port Um0; Controlled LED electronic circuit comprises the LED of some series aiding connections; Wherein, switch control rule port Um1 is that the electric current of controlled LED circuit flows into end, is connected with the outflow of bus current end of normal bright LED electronic circuit; The outflow of bus current end of any a level electronic circuit flows into hold with the electric current of rear stage a+1 level electronic circuit and is connected, and is connected with the Uma+1 output that Multistage Control multi output directly drives LED integrated circuit Um; Afterbody switch control rule port UmM is connected with one end of current sampling resistor Rs, and the other end of current sampling resistor Rs is connected with zero potential reference port Um0, is the outflow of bus current end of controlled LED circuit.
Further, three-phase full wave rectifier circuit comprises 6 kenotrons.
Further, three-phase electricity rectification LC height PF filtering high direct voltage is directly driven LED circuit and is also comprised overvoltage overcurrent control circuit, and overvoltage overcurrent control circuit comprises the current sampling resistor Rsk that over-voltage and over-current control integration circuit U g, MOS transistor T1, high pressure sampling resistor RH and over-voltage and over-current control control circuit; Wherein,
The drain electrode of MOS transistor T1 connects the outflow of bus current end of the controlled LED circuit of afterbody, source electrode connects one end of the pin 5 of over-voltage and over-current control integration circuit U g and the current sampling resistor Rsk of overvoltage overcurrent control circuit respectively, and the other end of the second current sampling resistor Rsk connects with reference to ground end GND; The grid of MOS transistor T1 connects the pin 4 of over-voltage and over-current control integration circuit U g; The pin 1 of over-voltage and over-current control integration circuit U g connects with reference to ground end GND, and pin 3 connects DC high-voltage output end VHD by high pressure sampling resistor RH.
Further, the model that single-stage controls directly to drive LED integrated circuit U comprises GG65.
Further, Multistage Control multi output directly drives LED integrated circuit Um model and comprises GG68.
Further, kenotron model comprises EM518.
Further, over-voltage and over-current control integration circuit model comprises GG13.
Compared with prior art, the utility model has following beneficial effect: the three-phase electricity rectification LC height PF filtering high direct voltage that the utility model provides directly drives LED circuit, the LC filter circuit applying the high PF of special inductance L and high-voltage capacitance C composition carries out filtering to three phase rectifier high pressure, power factor PF is greater than 0.95, its voltage ripple can be less than 0.1%, the current ripples of LED can be less than 1%, not only thoroughly can overcome optical frequency and dodge problem, this technology also has driving power conversion efficiency up to 95% simultaneously, high reliability, because the drive current of LED is bordering on ideal DC under these technical conditions simultaneously, to drive or compared with the obvious LED Driving technique of current ripples with interchange, light efficiency significantly improves.
This utility model to thoroughly overcome LED drive interchange optical frequency dodge problem, improve LED light efficiency, ensure high power factor, reduce high-power LED street lamp illumination cost significant, there are good economic results in society.
Accompanying drawing explanation
The three-phase electricity rectification LC height PF filtering high direct voltage that Fig. 1 provides for embodiment 1 directly drives LED circuit structured flowchart.
The another kind of three-phase electricity rectification LC height PF filtering high direct voltage that Fig. 2 provides for embodiment 2 directly drives LED circuit structured flowchart.
Fig. 3 directly drives the circuit diagram of LED for a kind of 120W three-phase electricity rectification LC height PF filtering high direct voltage that embodiment 3 provides.
Fig. 4 directly drives the circuit diagram of LED for another kind of 120W three-phase electricity rectification LC height PF filtering high direct voltage that embodiment 4 provides.
The three-phase electricity rectification LC height PF filtering high direct voltage with over-voltage and over-current controlling functions that Fig. 5 provides for embodiment 5 directly drives LED circuit circuit diagram.
Embodiment
The utility model is described in detail by way of example below in conjunction with accompanying drawing.
Embodiment 1:
As shown in Figure 1, a kind of three-phase electricity rectification LC height PF filtering high direct voltage directly drives LED circuit, comprises three-phase full wave rectifier circuit, LC high-pressure filter circuit, normal bright LED electronic circuit and controlled LED circuit; Wherein,
Three-phase full wave rectifier circuit B1 comprises three three-phase alternating current electrical inputs Vin1, Vin2, Vin3, and rectification high-voltage output end VH and reference ground end GND.
Present embodiments provide a kind of LC high-pressure filter circuit F1, comprise inductance L and high-voltage capacitance C.Wherein, inductance L and high-voltage capacitance C series connection, one end of inductance L connects rectification high-voltage output end VH, and one end of high-voltage capacitance C connects with reference to ground end GND, and the common port of inductance L and high-voltage capacitance C is the DC high-voltage output end VHD of LC high-pressure filter circuit F1.
Normal bright LED electronic circuit SL comprises the LED (LED 1-LED P) of one group of series aiding connection, and the electric current of normal bright LED electronic circuit SL flows into end and is connected with DC high-voltage output end VHD.
Controlled LED circuit comprises the controlled LED electronic circuit (KL 1-KL M) of some series connection, and the electric current of controlled LED circuit flows into end and is connected with the outflow of bus current end of normal bright LED electronic circuit SL, and the outflow of bus current end of controlled LED circuit holds GND to be connected with reference to ground.
In the present embodiment, each controlled LED electronic circuit (KL 1-KL M) comprise single-stage control directly drive LED integrated circuit U, current sampling resistor Rs and LED group; It is that special straight drives LED integrated circuit that single-stage controls directly to drive LED integrated circuit U, comprises switch control rule port U1, current sample port U2 and zero potential reference port U3; LED group comprises the LED (LED n-LED N) of some series aiding connections.Wherein, the electric current of LED group flows into end and is connected with switch control rule port U1, and the outflow of bus current end of LED group is connected with current sample port U2 and the one end of flowing sampling resistor Rs respectively, and the other end of stream sampling resistor Rs is the outflow of bus current end of controlled LED electronic circuit.
In the present embodiment, normal bright LED electronic circuit SL also can be made up of several grades of normal bright LED electronic circuits, and the position of normal bright LED electronic circuit SL and controlled LED electronic circuit (KL 1-KL M) can exchange.Meanwhile, Fig. 1 is example for single-chip LED, can use the LED that multicore string encapsulates in Fig. 1 equally, and now corresponding LED number is then corresponding to be reduced, and such as, for two core string LED, then the number of LED reduces by half.
Embodiment 2:
As shown in Figure 2, the present embodiment is from the difference of embodiment 1: the structure of controlled LED circuit is different.
In the present embodiment, controlled LED circuit also comprises Multistage Control multi output and directly drives LED integrated circuit Um and current sampling resistor Rs; Multistage Control multi output directly drives LED integrated circuit Um for what be provided with multiple control end (Um 1-Um M) and a zero potential reference edge Um 0 and directly drives LED integrated circuit; Wherein, controlled LED electronic circuit (KL 1-KL M) comprises LED group, and LED group comprises the LED (LED n-LED N) of some series aiding connections; The electric current of a LED group flows into the control end that LED integrated circuit Um is directly driven in the corresponding connection second of end, and current sampling resistor Rs one end is connected with the outflow of bus current end of afterbody controlled LED electronic circuit KL M, and the other end holds GND to be connected with reference to ground; The second zero potential reference edge Um 0 directly driving LED integrated circuit Um with reference to hold GND to be connected.
As shown in Figure 2, the present embodiment is example for single-chip LED, the controlled LED electronic circuit of M level (KL 1-KLM) shares one and directly drives LED high-voltage integrated circuit Um and share a current sampling resistor Rs, this directly drives LED high-voltage integrated circuit Um M switch control terminal (Um 1-Um M), LED electronic circuit controlled with several grades is connected respectively, and this directly drives LED high-voltage integrated circuit according to the size of input direct-current high pressure or the switch control rule that whether accesses respectively the controlled LED electronic circuit of M level according to the size of current flowing through LED.
The other technologies feature of the present embodiment is all identical with embodiment 1, does not repeat them here.
Embodiment 3:
As shown in Figure 3, the difference of the present embodiment and embodiment 1 is: the rectification LC height PF filtering high direct voltage providing a kind of 120W of being applicable to three-phase electricity directly drives the particular circuit configurations of LED circuit.
This enforcement provides another kind of LC high-pressure filter circuit F1, comprise inductance L, first high-voltage electrolytic capacitor C1, second high-voltage electrolytic capacitor C2, first discharge resistance R1 and the second discharge resistance R2, one end of inductance L connects rectification high-voltage output end VH, the other end of inductance L connects the positive pole of the first high-voltage electrolytic capacitor C1 and one end of the first discharge resistance R1 respectively, the negative pole of the first high-voltage electrolytic capacitor C1 connects the positive pole of the second high-voltage electrolytic capacitor C2 and one end of the second discharge resistance R2 respectively, the negative pole of the second high-voltage electrolytic capacitor C2 is connected with reference to ground end GND with the other end of the second discharge resistance R2, the other end of the first discharge resistance R1 connects the positive pole of the second high-voltage electrolytic capacitor C2, the common port of inductance L, the first high-voltage electrolytic capacitor C1 and the first discharge resistance R1 is the DC high-voltage output end VHD of LC high-pressure filter circuit.
In the present embodiment, three-phase full wave rectifier circuit B1 comprises 6 models is the kenotron of EM518.Normal bright LED electronic circuit SL is formed by LED1 ~ LED120 series aiding connection; Controlled LED electronic circuit KL1 ~ KL8 all by 10 series aiding connections LED, one directly drive LED integrated circuit and a current sampling resistor forms.Wherein, the specification of inductance L is that inductance value 200mH electric current 500mA, the first high-voltage electrolytic capacitor C1 and the second high-voltage electrolytic capacitor C2 are 100 μ F400V, the first discharge resistance R1 and the second discharge resistance and are the mono-core white light LEDs of 3.3V that 1m Ω, LED1 ~ LED200 is 350mA, directly drive that the model of LED integrated circuit U1 ~ U8 is GG65, sampling resistor Rs1 ~ Rs8 is respectively 10,11,12,13,15,16,18,20 ohm.The parameter of circuit is as shown in Figure 3: input three-phase voltage 300V ~ 460V, and power output 110W ~ 130W, power-efficient are greater than 95%, power factor PF is greater than 0.95, voltage ripple is less than 0.1, current ripples is less than 1%.
Certainly, the model of kenotron is not limited to EM518, and the kenotron of other model that meets the requirements is also in the protection range of this patent.
Certainly, the model that single-stage controls directly to drive LED integrated circuit is not limited to GG65, and the single-stage of other model that meets the requirements controls directly to drive LED integrated circuit also in the protection range of this patent.
The other technologies feature of the present embodiment is all identical with embodiment 1, does not repeat them here.
Embodiment 4:
As shown in Figure 4, the present embodiment is from the difference of embodiment 3: the circuit structure of controlled LED circuit is different, controlled LED circuit in the present embodiment is similar to embodiment 2, and 4 grades of controlled LED electronic circuits (KL 1-KL 4) share one and directly drive LED high-voltage integrated circuit Um and share a current sampling resistor Rs.
In the present embodiment, normal bright LED electronic circuit SL is formed by LED1 ~ LED120 series aiding connection; LED electronic circuit KL1 ~ KL4 is made up of LED integrated circuit Um and the current sampling resistor Rs that directly drive of 4 switch control rule the LED of 20 series aiding connections.Wherein, the model of directly driving LED integrated circuit U of 4 switch control rule is GG68, sampling resistor Rs1 is 10 ohm.The parameter of circuit is as shown in Figure 4: input three-phase voltage 300V ~ 460V, and power output 110W ~ 130W, power-efficient are greater than 95%, power factor PF is greater than 0.95, voltage ripple is less than 0.1, current ripples is less than 1%.
Certainly, the model that Multistage Control multi output directly drives LED integrated circuit is not limited to GG68, and the Multistage Control multi output of other model that meets the requirements directly drives LED integrated circuit also in the protection range of this patent.
The other technologies feature of the present embodiment is all identical with embodiment 3, does not repeat them here.
Embodiment 5:
As shown in Figure 5, the difference of the present embodiment and embodiment 3 is: also comprise overvoltage overcurrent control circuit KC1, and overvoltage overcurrent control circuit KC1 comprises over-voltage and over-current control integration circuit U g, the MOS transistor T1 and the second current sampling resistor Rsk that model is GG13; Wherein, the drain electrode of MOS transistor T1 connects the outflow of bus current end of controlled LED circuit, source electrode connects the pin 5 of over-voltage and over-current control integration circuit U g and one end of the second current sampling resistor Rsk respectively, and the other end of the second current sampling resistor Rsk connects with reference to ground end GND; The grid of MOS transistor T1 connects the pin 4 of over-voltage and over-current control integration circuit U g; The pin 1 of over-voltage and over-current control integration circuit U g connects with reference to ground end GND, and pin 3 connects DC high-voltage output end VHD.
In the present embodiment, controlled LED electronic circuit KL1 ~ KL4 all by 15 series aiding connections LED, one directly drive LED integrated circuit and a current sampling resistor forms.Overcurrent-overvoltage control circuit KC1 is made up of overcurrent-overvoltage control integration circuit U 5, MOS transistor T1 and current sampling resistor Rs5.Wherein, LED1 ~ LED180 is the mono-core white light LEDs of 3.3V of 350mA, the model of directly driving LED integrated circuit U1 ~ U4 is GG65, sampling resistor Rs1 ~ Rs4 is respectively 10,11,12,13 ohm, the model of integrated circuit Ug is GG13, the model of MOS transistor T1 be 6N60C, Rsk is 3.9 ohm.The parameter of circuit is as shown in Figure 5: input three-phase voltage 300V ~ 460V, and power output 112W ~ 128W, power-efficient are greater than 95%, power factor PF is greater than 0.95, voltage ripple is less than 0.1, current ripples is less than 1%.
Certainly, the model of over-voltage and over-current control integration circuit is not limited to GG13, and the over-voltage and over-current control integration circuit of other model that meets the requirements is also in the protection range of this patent.
Be only several specific embodiments of the application above, but the application is not limited thereto, the change that any those skilled in the art can think, all should drops in the protection range of the application.
Claims (7)
1. three-phase electricity rectification LC height PF filtering high direct voltage directly drives a LED circuit, comprises three-phase full wave rectifier circuit, normal bright LED electronic circuit and controlled LED circuit, it is characterized in that, also comprise LC high-pressure filter circuit; Wherein, described three-phase full wave rectifier circuit comprises three three-phase alternating current electrical inputs Vin1, Vin2, Vin3, and rectification high-voltage output end VH and reference ground end GND;
Described LC high-pressure filter circuit comprises inductance L and high-voltage capacitance C, described inductance L and high-voltage capacitance C series connection, one end of described inductance L connects described rectification high-voltage output end VH, one end of described high-voltage capacitance C connects with reference to ground end GND, and the common port of described inductance L and high-voltage capacitance C is the DC high-voltage output end VHD of LC high-pressure filter circuit;
Or, described LC high-pressure filter circuit comprises inductance L, first high-voltage electrolytic capacitor C1, second high-voltage electrolytic capacitor C2, first discharge resistance R1 and the second discharge resistance R2, one end of described inductance L connects described rectification high-voltage output end VH, the other end of described inductance L connects the positive pole of described first high-voltage electrolytic capacitor C1 and one end of described first discharge resistance R1 respectively, the negative pole of described first high-voltage electrolytic capacitor C1 connects the positive pole of described second high-voltage electrolytic capacitor C2 and one end of described second discharge resistance R2 respectively, the negative pole of described second high-voltage electrolytic capacitor C2 is connected described with reference to ground end GND with the other end of described second discharge resistance R2, the other end of described first discharge resistance R1 connects the positive pole of described second high-voltage electrolytic capacitor C2, the common port of described inductance L, described first high-voltage electrolytic capacitor C1 and described first discharge resistance R1 is the DC high-voltage output end VHD of LC high-pressure filter circuit,
Described normal bright LED electronic circuit comprises the LED of one group of series aiding connection, and the electric current of described normal bright LED electronic circuit flows into end and is connected with described DC high-voltage output end VHD;
Described controlled LED circuit comprises the controlled LED electronic circuit of some series connection, and the electric current of described controlled LED circuit flows into end and is connected with the outflow of bus current end of described normal bright LED electronic circuit, and the outflow of bus current end of described controlled LED circuit holds GND to be connected with described with reference to ground.
2. three-phase electricity rectification LC height PF filtering high direct voltage according to claim 1 directly drives LED circuit, it is characterized in that, described controlled LED electronic circuit comprises single-stage and controls directly to drive LED integrated circuit U, current sampling resistor Rs and LED group; It is that special straight drives LED integrated circuit that described single-stage controls directly to drive LED integrated circuit U, comprises switch control rule port U1, current sample port U2 and zero potential reference port U3; Described LED group comprises the LED of some series aiding connections; Wherein, the electric current of described LED group flows into end and is connected with described switch control rule port U1, the outflow of bus current end of described LED group is connected with one end of described current sample port U2 and described current sampling resistor Rs respectively, the other end of described current sampling resistor Rs is connected with described zero potential reference port U3, is the outflow of bus current end of described controlled LED electronic circuit;
In described controlled LED circuit, the zero potential reference edge of previous stage LED electronic circuit flows into hold with the electric current of rear stage LED electronic circuit and is connected, and afterbody LED electronic circuit zero potential reference edge U3 holds GND to be connected with reference to ground.
3. three-phase electricity rectification LC height PF filtering high direct voltage according to claim 1 directly drives LED circuit, it is characterized in that, described controlled LED circuit also comprises Multistage Control multi output and directly drives LED integrated circuit Um and current sampling resistor Rs, it is that special straight drives LED integrated circuit that described Multistage Control multi output directly drives LED integrated circuit Um, comprise M switch control rule port Um 1, Um 2 ... UmM, and zero potential reference port Um 0; Described controlled LED electronic circuit comprises the LED of some series aiding connections; Wherein,
Switch control rule port Um 1 is that the electric current of controlled LED circuit flows into end, is connected with the outflow of bus current end of normal bright LED electronic circuit; The outflow of bus current end of any a level electronic circuit flows into hold with the electric current of rear stage a+1 level electronic circuit and is connected, and is connected with the Um a+1 output that Multistage Control multi output directly drives LED integrated circuit; Switch control rule port Um M is connected with one end of described current sampling resistor Rs, and the other end of described current sampling resistor Rs is connected with described zero potential reference port Um 0, is the outflow of bus current end of described controlled LED circuit.
4. three-phase electricity rectification LC height PF filtering high direct voltage according to claim 1 directly drives LED circuit, and it is characterized in that, described three-phase full wave rectifier circuit comprises 6 kenotrons.
5. three-phase electricity rectification LC height PF filtering high direct voltage according to claim 2 directly drives LED circuit, it is characterized in that, the model that described single-stage controls directly to drive LED integrated circuit U is GG65.
6. three-phase electricity rectification LC height PF filtering high direct voltage according to claim 3 directly drives LED circuit, it is characterized in that, it is GG68 that described Multistage Control multi output directly drives LED integrated circuit Um model.
7. three-phase electricity rectification LC height PF filtering high direct voltage according to claim 4 directly drives LED circuit, and it is characterized in that, described kenotron model is EM518.
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| CN201420458295.2U CN204231697U (en) | 2014-08-14 | 2014-08-14 | A kind of three-phase electricity rectification LC height PF filtering high direct voltage directly drives LED circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657886A (en) * | 2015-12-11 | 2016-06-08 | 合肥云杉光电科技有限公司 | Passive harmonic-filter direct-current high-voltage direct driving LED method and circuit thereof |
| CN114126152A (en) * | 2022-01-26 | 2022-03-01 | 杭州易会通科技有限公司 | Integrated circuit and driving circuit for three-phase alternating current commercial power LED tunnel lamp |
| TWI819637B (en) * | 2022-06-02 | 2023-10-21 | 台達電子工業股份有限公司 | Led switching system and control method thereof |
-
2014
- 2014-08-14 CN CN201420458295.2U patent/CN204231697U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657886A (en) * | 2015-12-11 | 2016-06-08 | 合肥云杉光电科技有限公司 | Passive harmonic-filter direct-current high-voltage direct driving LED method and circuit thereof |
| CN114126152A (en) * | 2022-01-26 | 2022-03-01 | 杭州易会通科技有限公司 | Integrated circuit and driving circuit for three-phase alternating current commercial power LED tunnel lamp |
| TWI819637B (en) * | 2022-06-02 | 2023-10-21 | 台達電子工業股份有限公司 | Led switching system and control method thereof |
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