CN104135804A - Three-phase power rectification LC high-PF filtering direct-current high-voltage direct-drive LED circuit - Google Patents
Three-phase power rectification LC high-PF filtering direct-current high-voltage direct-drive LED circuit Download PDFInfo
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Abstract
The invention discloses a three-phase power rectification LC high-PF filtering direct-current high-voltage direct-drive LED circuit. The three-phase power rectification LC high-PF filtering direct-current high-voltage direct-drive LED circuit comprises a three-phase full-wave rectifier, a high-PF LC high-voltage filter circuit, a normally-on LED sub-circuit, a plurality levels of controlled LED sub-circuits and the like, wherein a three-phase alternating current is processed through three-phased full-wave rectification, so that an alternating-current and direct-current ripple high voltage is obtained, the alternating-current and direct-current ripple high voltage is then filtered by the high-PF LC high-voltage filter circuit so that an ideal direct-current high voltage can be obtained, and under control of a direct-drive integrated circuit, the direct-current high voltage directly drives LEDs, and the multiple levels of controlled LED sub-circuits are controlled by the direct-drive LED integrated circuit; when the transient voltage of a current sampling resistor is smaller than some threshold voltage, loads of the LED sub-circuits are short circuited by the integrated circuit; when the transient voltage of the current sampling resistor is larger than or equal to some threshold voltage, the loads of the LED sub-circuits are connected in by the integrated circuit. The three-phase power rectification LC high-PF filtering direct-current high-voltage direct-drive LED circuit has the advantages of being high in power supply conversion efficiency, large in power factor, small in current ripple, good in light flash resistance, high in reliability, low in cost and the like.
Description
Technical Field
The invention belongs to the field of electronics, and particularly relates to a three-phase electric rectification LC high PF filtering direct current high voltage direct drive LED circuit.
Background
Light Emitting Diodes (LEDs), as a new generation of light emitting devices, have the outstanding advantage of high efficiency and energy saving, and are being widely used to replace the conventional lighting technology. Compared with the technology of driving the LED by the switching power supply, the technology of directly driving the LED by the single-phase alternating current commercial power has the characteristic of high reliability. Compared with the single-phase alternating current direct-drive LED technology, the three-phase electric direct-drive LED technology has the advantages of high drive voltage, low current, low cost of wires and cables and the like, and is particularly suitable for high-power LED road illumination of street lamps and the like. For the technology, the inventor has obtained a national utility model patent of 'road lighting circuit for converting three-phase alternating current into direct current high voltage and directly driving LED' (patent number: ZL 201420013866.1). However, in the existing three-phase direct-drive LED technology, the AC/DC high voltage obtained by full-wave rectification of three-phase electricity directly drives the LED, the AC/DC high voltage has voltage ripples larger than 13% without filtering, the current ripples of the LED are quite large, the problem of optical frequency flash is serious, and the road driving safety can be affected even under certain conditions. For the three-phase direct-drive LED technology, the method has extremely important application value on how to thoroughly overcome the problem of light frequency flash of the LED. The light frequency of LED flashes the problem and causes by the voltage current ripple of drive LED, to ordinary three-phase rectification filtering technique, uses high-voltage capacitor directly to carry out the filtering to the rectification high pressure, thereby can conveniently reduce the voltage current ripple and overcome the light stroboflash, but it has a serious technical problem, can cause drive power supply's power factor PF greatly reduced promptly, can not satisfy the index requirement of high-power LED lamps and lanterns to PF, must specially design the three-phase of research and development high PF directly drives the LED technique. The invention provides a novel three-phase electric rectification LC high-PF filtering DC high-voltage direct-drive LED circuit, which is used for filtering three-phase rectification high voltage by using a special high-PF LC filtering circuit consisting of an inductor L and a high-voltage capacitor C, wherein the power factor PF is more than 0.95, the voltage ripple can be less than 0.1%, and the current ripple of an LED can be less than 1%, so that the problem of optical frequency flash can be thoroughly solved, meanwhile, the technology also has the advantages that the conversion efficiency of a driving power supply is as high as 95%, the reliability is high, and the like. The LED street lamp has important significance for thoroughly overcoming the problem of LED-driven alternating light frequency flashing, improving the lighting effect of the LED, ensuring high power factor and reducing the lighting cost of the high-power LED street lamp, and has good social and economic benefits.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a three-phase electric rectification LC high PF filtering DC high voltage direct drive LED circuit, which has the following specific technical scheme:
a three-phase electric rectification LC high PF filtering direct current high voltage direct drive LED circuit comprises a three-phase full wave rectifier, an LC high voltage filter circuit, a normally-on LED sub-circuit and a controlled LED circuit; the three-phase full-wave rectifier comprises three-phase alternating current input ends Vin1, Vin2 and Vin3, a rectified high-voltage output end VH and a reference ground end GND;
the LC high-voltage filter circuit comprises an inductor L and a high-voltage capacitor C, the inductor L and the capacitor C are connected in series, one end of the inductor L is connected with a rectification high-voltage output end VH, one end of the capacitor C is connected with a reference ground end GND, and the common end of the inductor L and the high-voltage capacitor C is a direct-current high-voltage output end VHD of the LC high-voltage filter circuit;
or, the LC high-voltage filter circuit comprises an inductor L, a first high-voltage electrolytic capacitor C1, a second high-voltage electrolytic capacitor C2, a first discharge resistor R1 and a second discharge resistor R2, one end of the inductor L is connected with a rectification high-voltage output end VH, the other end of the inductor L is respectively connected with the anode of the first high-voltage electrolytic capacitor C1 and one end of a first discharge resistor R1, the cathode of the first high-voltage electrolytic capacitor C1 is respectively connected with the anode of the second high-voltage electrolytic capacitor C2 and one end of the second discharge resistor R2, and the cathode of the second high-voltage electrolytic capacitor C2 and the other end of the second discharge resistor R2 are connected with a reference ground GND; the other end of the first discharge resistor R1 is connected with the anode of the second high-voltage electrolytic capacitor C2; the common end of the inductor L, the first high-voltage capacitor C and the first discharge resistor R1 is a direct-current high-voltage output end VHD of the LC high-voltage filter circuit;
the normally-on LED sub-circuit comprises a group of LEDs connected in series in the same direction, and a current inflow end of the normally-on LED sub-circuit is connected with a direct-current high-voltage output end VHD;
the controlled LED circuit comprises a plurality of controlled LED sub-circuits connected in series, a current inflow end of the controlled LED circuit is connected with a current outflow end of the normally-on LED sub-circuit, and the current outflow end of the controlled LED circuit is connected with a reference ground end GND.
Further, the controlled LED sub-circuit comprises a single-stage control direct-drive LED integrated circuit U, a current sampling resistor Rs and an LED group; the single-stage control direct-drive LED integrated circuit U is a special direct-drive LED integrated circuit and comprises a switch control port U1, a current sampling port U2 and a zero potential reference port U3; the LED group comprises a plurality of LEDs which are connected in series in the same direction; wherein,
the current inflow end of the LED group is connected with the switch control port U1, the current outflow end of the LED group is respectively connected with the current sampling port U2 and one end of a current sampling resistor Rs, and the other end of the current sampling resistor Rs is connected with a zero potential reference port U3 and is the current outflow end of the controlled LED sub circuit;
the zero potential reference end of the front-stage LED sub-circuit in the controlled LED circuit is connected with the current inflow end of the rear-stage LED sub-circuit, and the zero potential reference end U3 of the last-stage LED sub-circuit is connected with the reference ground end GND.
In addition, the controlled LED circuit also comprises a multi-level control multi-output direct-drive LED integrated circuit Um and a current sampling resistor Rs, wherein the Um is a special direct-drive LED integrated circuit and comprises M switch control ports Um 1 and Um 2 … UmM and a zero potential reference port Um 0; the controlled LED sub-circuit comprises a plurality of LEDs which are connected in series in the same direction; the switch control port Um 1 is a current inflow end of the controlled LED circuit and is connected with a current outflow end of the normally-on LED sub-circuit; the current outflow end of any a-stage sub circuit is connected with the current inflow end of a subsequent a + 1-stage sub circuit and is connected with the Um a +1 output end of the multi-stage control multi-output direct-drive LED integrated circuit Um; and the control port Um M of the last stage of switch is connected with one end of a current sampling resistor Rs, and the other end of the current sampling resistor Rs is connected with a zero potential reference port Um 0 and is a current outflow end of the controlled LED circuit.
Further, the three-phase full-wave rectifier comprises 6 high-voltage rectifying diodes.
Further, the three-phase electric rectification LC high PF filtering direct current high voltage direct drive LED circuit further comprises an overvoltage and overcurrent control circuit, wherein the overvoltage and overcurrent control circuit comprises an overvoltage and overcurrent control integrated circuit Ug, a MOS transistor T1, a high voltage sampling resistor RH and a current sampling resistor Rsk of the overvoltage and overcurrent control circuit; wherein,
the drain electrode of the MOS transistor T1 is connected with the current outflow end of the last-stage controlled LED circuit, the source electrode is respectively connected with a pin 5 of the overvoltage and overcurrent control integrated circuit Ug and one end of a current sampling resistor Rsk of the overvoltage and overcurrent control circuit, and the other end of the second current sampling resistor Rsk is connected with a reference ground end GND; the grid electrode of the MOS transistor T1 is connected with a pin 4 of an overvoltage and overcurrent control integrated circuit Ug; and a pin 1 of the overvoltage and overcurrent control integrated circuit Ug is connected with a reference ground end GND, and a pin 3 is connected with a direct-current high-voltage output end VHD through a high-voltage sampling resistor RH.
Further, the model of the single-stage control direct-drive LED integrated circuit U comprises GG 65.
Further, the model of the multi-stage control multi-output direct-drive LED integrated circuit Um comprises GG 68.
Further, the high voltage rectifier diode model includes EM 518.
Further, the overvoltage and overcurrent control integrated circuit model comprises GG 13.
Compared with the prior art, the invention has the following beneficial effects:
the three-phase electric rectification LC high PF filtering direct current high voltage direct drive LED circuit provided by the invention filters three-phase rectification high voltage by applying the special high PF LC filter circuit composed of the inductor L and the high voltage capacitor C, the power factor PF is more than 0.95, the voltage ripple can be less than 0.1%, the current ripple of the LED can be less than 1%, the problem of optical frequency flash can be thoroughly overcome, meanwhile, the technology also has the advantages that the conversion efficiency of the driving power supply is as high as 95%, the reliability is high, and the like. The LED street lamp has important significance for thoroughly overcoming the problem of LED-driven alternating light frequency flashing, improving the lighting effect of the LED, ensuring high power factor and reducing the lighting cost of the high-power LED street lamp, and has good social and economic benefits.
Drawings
Fig. 1 is a block diagram of a three-phase electric rectification LC high PF filtering dc high voltage direct drive LED circuit structure provided in embodiment 1.
Fig. 2 is a block diagram of another three-phase electric rectification LC high PF filtering dc high voltage direct-drive LED circuit structure provided in embodiment 2.
Fig. 3 is a circuit diagram of a 120W three-phase electric rectification LC high PF filtering dc high voltage direct drive LED provided in embodiment 3.
Fig. 4 is a circuit diagram of another 120W three-phase electric rectification LC high PF filtering dc high voltage direct drive LED provided in embodiment 4.
Fig. 5 is a circuit diagram of a three-phase electric rectification LC high PF filtering dc high voltage direct-drive LED circuit with overvoltage and overcurrent control function provided in embodiment 5.
Detailed Description
The present invention will now be described in detail by way of example with reference to the accompanying drawings.
Example 1:
as shown in fig. 1, a three-phase electric rectification LC high PF filtering dc high voltage direct drive LED circuit includes a three-phase full wave rectifier, an LC high voltage filter circuit, a normally-on LED sub-circuit and a controlled LED circuit; wherein,
the three-phase full-wave rectifier B1 comprises three-phase alternating current input ends Vin1, Vin2 and Vin3, as well as a rectified high-voltage output end VH and a reference ground end GND.
The embodiment provides an LC high-voltage filter circuit F1, which includes an inductor L and a high-voltage capacitor C. The inductor L is connected with the capacitor C in series, one end of the inductor L is connected with the rectification high-voltage output end VH, one end of the capacitor C is connected with the reference ground end GND, and the common end of the inductor L and the high-voltage capacitor C is the direct-current high-voltage output end VHD of the LC high-voltage filter circuit F1.
The normally-on LED sub-circuit SL comprises a group of LEDs (LED 1-LED P) which are connected in series in the same direction, and the current inflow end of the normally-on LED sub-circuit SL is connected with the direct-current high-voltage output end VHD.
The controlled LED circuit comprises a plurality of controlled LED sub-circuits (KL 1-KLM) which are connected in series, a current inflow end of the controlled LED circuit is connected with a current outflow end of the normally-on LED sub-circuit SL, and a current outflow end of the controlled LED circuit is connected with a reference ground end GND.
In the embodiment, each controlled LED sub-circuit (KL 1-KL M) includes a single-stage control direct-drive LED integrated circuit U, a current sampling resistor Rs and an LED group; the single-stage control direct-drive LED integrated circuit U is a special direct-drive LED integrated circuit and comprises a switch control port U1, a current sampling port U2 and a zero potential reference port U3; the LED group comprises a plurality of LEDs (LED N-LED N) which are connected in series in the same direction. The current inflow end of the LED group is connected with the switch control port U1, the current outflow end of the LED group is respectively connected with the current sampling port U2 and one end of the current sampling resistor Rs, and the other end of the current sampling resistor Rs is the current outflow end of the controlled LED sub-circuit.
In this embodiment, the normally-on LED sub-circuit SL may also be composed of several stages of normally-on LED sub-circuits, and the positions of the normally-on LED sub-circuit SL and the controlled LED sub-circuits (KL 1-KL M) may be exchanged. Meanwhile, fig. 1 is for a single chip LED as an example, and in fig. 1, a multi-core string packaged LED may also be used, in which case the number of corresponding LEDs is correspondingly reduced, for example, for a two-core string LED, the number of LEDs is reduced by half.
Example 2:
as shown in fig. 2, the present embodiment is different from embodiment 1 in that: the controlled LED circuits differ in their structure.
In this embodiment, the controlled LED circuit further includes a multi-stage control multi-output direct-drive LED integrated circuit Um and a current sampling resistor Rs; the multi-level control multi-output direct-drive LED integrated circuit Um is a direct-drive LED integrated circuit provided with a plurality of control terminals (Um 1-Um M) and a zero potential reference terminal Um 0; the controlled LED sub-circuit (KL 1-KL M) comprises an LED group, and the LED group comprises a plurality of LEDs (LED N-LED N) connected in series in the same direction; the current inflow end of one LED group is correspondingly connected with one control end of a second direct-drive LED integrated circuit Um, one end of a current sampling resistor Rs is connected with the current outflow end of the last-stage controlled LED sub-circuit KLM, and the other end of the current sampling resistor Rs is connected with a reference ground end GND; and a zero potential reference end Um 0 of the second direct-drive LED integrated circuit Um is connected with a reference ground end GND.
As shown in fig. 2, in this embodiment, for a single chip LED as an example, M-level controlled LED sub-circuits (KL 1-klm) share a direct-drive LED high-voltage integrated circuit Um and a current sampling resistor Rs, the direct-drive LED high-voltage integrated circuit Um has M switch control terminals (Um 1-Um M) and is respectively connected to several levels of controlled LED sub-circuits, and the direct-drive LED high-voltage integrated circuit respectively performs on-off control on whether the M-level controlled LED sub-circuits are connected according to the magnitude of an input direct-current high voltage or according to the magnitude of a current flowing through the LED.
Other technical features of this embodiment are the same as those of embodiment 1, and are not described herein again.
Example 3:
as shown in fig. 3, the present embodiment is different from embodiment 1 in that: the specific circuit structure of the rectification LC high PF filtering direct current high voltage direct drive LED circuit suitable for 120W three-phase power is provided.
The implementation provides another LC high-voltage filter circuit F1, which includes an inductor L, a first high-voltage electrolytic capacitor C1, a second high-voltage electrolytic capacitor C2, a first discharging resistor R1 and a second discharging resistor R2, wherein one end of the inductor L is connected to a rectification high-voltage output terminal VH, the other end of the inductor L is connected to an anode of the first high-voltage electrolytic capacitor C1 and one end of a first discharging resistor R1, a cathode of the first high-voltage electrolytic capacitor C1 is connected to an anode of the second high-voltage electrolytic capacitor C2 and one end of a second discharging resistor R2, and a cathode of the second high-voltage electrolytic capacitor C2 and the other end of the second discharging resistor R2 are connected to a reference ground terminal GND; the other end of the first discharge resistor R1 is connected with the anode of the second high-voltage electrolytic capacitor C2; and the common end of the inductor L, the first high-voltage capacitor C and the first discharge resistor R1 is a direct-current high-voltage output end VHD of the LC high-voltage filter circuit.
In this embodiment, the three-phase full-wave rectifier B1 includes 6 high-voltage rectifier diodes of type EM 518. The normally-on LED sub-circuit SL is formed by connecting LEDs 1-120 in series in the same direction; the controlled LED sub-circuits KL 1-KL 8 are composed of 10 LEDs connected in series in the same direction, a direct-drive LED integrated circuit and a current sampling resistor. The specification of the inductor L is that the inductance value is 200mH, the current is 500mA, the first high-voltage electrolytic capacitor C1 and the second high-voltage electrolytic capacitor C2 are both 100 muF 400V, the first discharging resistor R1 and the second discharging resistor are both 1 mOmega, the LED 1-LED 200 are a 350mA 3.3V single-core white LED, the direct-drive LED integrated circuits U1-U8 are GG65, and the sampling resistors Rs 1-Rs 8 are respectively 10, 11, 12, 13, 15, 16, 18 and 20 ohms. The parameters of the circuit shown in fig. 3 are: the power supply has the advantages that the input three-phase voltage is 300-460V, the output power is 110-130W, the power supply efficiency is greater than 95%, the power factor PF is greater than 0.95, the voltage ripple is less than 0.1, and the current ripple is less than 1%.
Of course, the type of the high voltage rectifier diode is not limited to the EM518, and other types of high voltage rectifier diodes are also within the scope of the present patent.
Of course, the model of the single-stage control direct-drive LED integrated circuit is not limited to GG65, and other models of single-stage control direct-drive LED integrated circuits are also within the protection scope of the patent.
Other technical features of this embodiment are the same as those of embodiment 1, and are not described herein again.
Example 4:
as shown in fig. 4, the present embodiment is different from embodiment 3 in that: the circuit structures of the controlled LED circuits are different, the controlled LED circuits in the embodiment are similar to those in the embodiment 2, and the 4-stage controlled LED sub-circuits (KL 1-KL 4) share one direct-drive LED high-voltage integrated circuit Um and one current sampling resistor Rs.
In the present embodiment, the normally-on LED sub-circuit SL is formed by serially connecting LEDs 1-120 in the same direction; the LED subcircuits KL 1-KL 4 are composed of 20 LEDs connected in series in the same direction, a direct-drive LED integrated circuit Um controlled by 4 switches and a current sampling resistor Rs. The model of the direct-drive LED integrated circuit U controlled by the 4 switches is GG68, and the model of the sampling resistor Rs1 is 10 ohms. The parameters of the circuit shown in fig. 4 are: the power supply has the advantages that the input three-phase voltage is 300-460V, the output power is 110-130W, the power supply efficiency is greater than 95%, the power factor PF is greater than 0.95, the voltage ripple is less than 0.1, and the current ripple is less than 1%.
Of course, the model of the multi-stage control multi-output direct-drive LED integrated circuit is not limited to GG68, and it is within the scope of the present patent to meet the requirements of other models of multi-stage control multi-output direct-drive LED integrated circuits.
Other technical features of this embodiment are the same as those of embodiment 3, and are not described herein again.
Example 5:
as shown in fig. 5, the present embodiment is different from embodiment 3 in that: the overvoltage and overcurrent protection circuit comprises an overvoltage and overcurrent control circuit KC1, wherein the overvoltage and overcurrent control circuit KC1 comprises an overvoltage and overcurrent control integrated circuit Ug with the model number of GG13, a MOS transistor T1 and a second current sampling resistor Rsk; the drain electrode of the MOS transistor T1 is connected with the current outflow end of the controlled LED circuit, the source electrode of the MOS transistor T1 is respectively connected with a pin 5 of the overvoltage and overcurrent control integrated circuit Ug and one end of a second current sampling resistor Rsk, and the other end of the second current sampling resistor Rsk is connected with a reference ground end GND; the grid electrode of the MOS transistor T1 is connected with a pin 4 of an overvoltage and overcurrent control integrated circuit Ug; and a pin 1 of the overvoltage and overcurrent control integrated circuit Ug is connected with a reference ground end GND, and a pin 3 is connected with a direct-current high-voltage output end VHD.
In the embodiment, the controlled LED sub-circuits KL 1-KL 4 are composed of 15 LEDs connected in series in the same direction, a direct-drive LED integrated circuit and a current sampling resistor. The over-current and over-voltage control circuit KC1 is composed of an over-current and over-voltage control integrated circuit U5, a MOS transistor T1 and a current sampling resistor Rs 5. The LED 1-LED 180 are 350mA 3.3V single-core white LEDs, the direct-drive LED integrated circuits U1-U4 are GG65, the sampling resistors Rs 1-Rs 4 are 10, 11, 12 and 13 ohms respectively, the integrated circuit Ug is GG13, the MOS transistor T1 is 6N60C, and the Rsk is 3.9 ohms. The parameters of the circuit shown in fig. 5 are: the power supply has the advantages that the input three-phase voltage is 300-460V, the output power is 112-128W, the power efficiency is greater than 95%, the power factor PF is greater than 0.95, the voltage ripple is less than 0.1, and the current ripple is less than 1%.
Of course, the type of the over-voltage and over-current control integrated circuit is not limited to GG13, and other types of over-voltage and over-current control integrated circuits are also within the protection scope of the patent.
The above disclosure is only for the purpose of describing several embodiments of the present application, but the present application is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present application.
Claims (9)
1. A three-phase electric rectification LC high PF filtering direct current high voltage direct drive LED circuit comprises a three-phase full wave rectifier, a normally-on LED sub-circuit and a controlled LED circuit, and is characterized by also comprising an LC high voltage filtering circuit; the three-phase full-wave rectifier comprises three-phase alternating current input ends Vin1, Vin2 and Vin3, a rectified high-voltage output end VH and a reference ground end GND;
the LC high-voltage filter circuit comprises an inductor L and a high-voltage capacitor C, the inductor L and the capacitor C are connected in series, one end of the inductor L is connected with the rectification high-voltage output end VH, one end of the capacitor C is connected with a reference ground end GND, and the common end of the inductor L and the high-voltage capacitor C is a direct-current high-voltage output end VHD of the LC high-voltage filter circuit;
or, the LC high-voltage filter circuit includes an inductor L, a first high-voltage electrolytic capacitor C1, a second high-voltage electrolytic capacitor C2, a first discharge resistor R1, and a second discharge resistor R2, one end of the inductor L is connected to the rectification high-voltage output terminal VH, the other end of the inductor L is connected to the positive electrode of the first high-voltage electrolytic capacitor C1 and one end of the first discharge resistor R1, the negative electrode of the first high-voltage electrolytic capacitor C1 is connected to the positive electrode of the second high-voltage electrolytic capacitor C2 and one end of the second discharge resistor R2, and the negative electrode of the second high-voltage electrolytic capacitor C2 and the other end of the second discharge resistor R2 are connected to the reference ground GND; the other end of the first discharge resistor R1 is connected with the anode of the second high-voltage electrolytic capacitor C2; the common end of the inductor L, the first high-voltage capacitor C and the first discharge resistor R1 is a direct-current high-voltage output end VHD of the LC high-voltage filter circuit;
the normally-on LED sub-circuit comprises a group of LEDs connected in series in the same direction, and a current inflow end of the normally-on LED sub-circuit is connected with the direct-current high-voltage output end VHD;
the controlled LED circuit comprises a plurality of controlled LED sub-circuits connected in series, a current inflow end of the controlled LED circuit is connected with a current outflow end of the normally-on LED sub-circuit, and the current outflow end of the controlled LED circuit is connected with the reference ground end GND.
2. The three-phase electrically rectified LC high PF filtered DC high voltage direct drive LED circuit as claimed in claim 1, wherein said controlled LED sub-circuit comprises a single-stage control direct drive LED integrated circuit U, a current sampling resistor Rs and an LED group; the single-stage control direct-drive LED integrated circuit U is a special direct-drive LED integrated circuit and comprises a switch control port U1, a current sampling port U2 and a zero potential reference port U3; the LED group comprises a plurality of LEDs which are connected in series in the same direction; the current inflow end of the LED group is connected with the switch control port U1, the current outflow end of the LED group is respectively connected with the current sampling port U2 and one end of the current sampling resistor Rs, and the other end of the current sampling resistor Rs is connected with the zero potential reference port U3 and is the current outflow end of the controlled LED sub-circuit;
and a zero potential reference end of a front-stage LED sub-circuit in the controlled LED circuit is connected with a current inflow end of a rear-stage LED sub-circuit, and a zero potential reference end U3 of a last-stage LED sub-circuit is connected with a reference ground end GND.
3. The three-phase electrically rectified LC high PF filtered direct current high voltage direct drive LED circuit as claimed in claim 1, wherein the controlled LED circuit further comprises a multi-level control multi-output direct drive LED integrated circuit Um and a current sampling resistor Rs, the multi-level control multi-output direct drive LED integrated circuit Um is a special direct drive LED integrated circuit and comprises M switch control ports Um 1, Um 2 … UmM and a zero potential reference port Um 0; the controlled LED sub-circuit comprises a plurality of LEDs which are connected in series in the same direction; the switch control port Um 1 is a current inflow end of the controlled LED circuit and is connected with a current outflow end of the normally-on LED sub-circuit; the current outflow end of any a-stage sub circuit is connected with the current inflow end of a + 1-stage sub circuit of the next stage, and is connected with the Um a +1 output end of the multi-stage control multi-output direct-drive LED integrated circuit; and the switch control port Um M is connected with one end of the current sampling resistor Rs, and the other end of the current sampling resistor Rs is connected with the zero potential reference port Um 0 and is a current outflow end of the controlled LED circuit.
4. The three-phase electrically rectified LC high PF filtered DC high voltage direct drive LED circuit as claimed in claim 1, wherein said three-phase full wave rectifier comprises 6 high voltage rectifier diodes.
5. The three-phase electric rectification LC high PF filtering direct current high voltage direct drive LED circuit according to any one of claims 1 to 4, further comprising an overvoltage and overcurrent control circuit, wherein the overvoltage and overcurrent control circuit comprises an overvoltage and overcurrent control integrated circuit Ug, a MOS transistor T1, a high voltage sampling resistor RH and a current sampling resistor Rsk of the overvoltage and overcurrent control circuit; the drain of the MOS transistor T1 is connected to the current outflow end of the last-stage controlled LED circuit, the source is connected to the pin 5 of the overvoltage and overcurrent control integrated circuit Ug and one end of the current sampling resistor Rsk, respectively, and the other end of the current sampling resistor Rsk is connected to the reference ground GND; the grid electrode of the MOS transistor T1 is connected with a pin 4 of the overvoltage and overcurrent control integrated circuit Ug; and a pin 1 of the overvoltage and overcurrent control integrated circuit Ug is connected with the reference ground end GND, and a pin 3 is connected with the direct-current high-voltage output end VHD through a high-voltage sampling resistor RH.
6. The three-phase electrically rectified LC high PF filtered DC high voltage direct drive LED circuit as claimed in claim 2, wherein the single-stage control direct drive LED integrated circuit U model number comprises GG 65.
7. The three-phase electrically rectified LC high PF filtered DC high voltage direct drive LED circuit as claimed in claim 3, wherein said multi-level controlled multi-output direct drive LED integrated circuit Um model includes GG 68.
8. The three-phase electrically rectified LC high PF filtered DC high voltage direct drive LED circuit as claimed in claim 4, wherein said high voltage rectifier diode model comprises EM 518.
9. The three-phase electrically rectified LC high PF filtered DC high voltage direct drive LED circuit as claimed in claim 5, wherein said over voltage and over current control integrated circuit model includes GG 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410399182.4A CN104135804A (en) | 2014-08-14 | 2014-08-14 | Three-phase power rectification LC high-PF filtering direct-current high-voltage direct-drive LED circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410399182.4A CN104135804A (en) | 2014-08-14 | 2014-08-14 | Three-phase power rectification LC high-PF filtering direct-current high-voltage direct-drive LED circuit |
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| CN104135804A true CN104135804A (en) | 2014-11-05 |
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| CN201410399182.4A Pending CN104135804A (en) | 2014-08-14 | 2014-08-14 | Three-phase power rectification LC high-PF filtering direct-current high-voltage direct-drive LED circuit |
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| CN104302071A (en) * | 2014-11-11 | 2015-01-21 | 杭州华普永明光电股份有限公司 | High-voltage direct-drive LED (light-emitting diode) illumination system |
| CN104302072A (en) * | 2014-11-11 | 2015-01-21 | 杭州华普永明光电股份有限公司 | Direct-drive LED (Light Emitting Diode) illuminating system controlled by integrated control circuit |
| CN104302073A (en) * | 2014-11-11 | 2015-01-21 | 杭州华普永明光电股份有限公司 | Direct-drive LED (Light Emitting Diode) illuminating system controlled by integrated control circuit |
| CN104302070A (en) * | 2014-11-11 | 2015-01-21 | 杭州华普永明光电股份有限公司 | Direct-drive LED (Light Emitting Diode) illuminating system controlled by integrated control circuit |
| CN104302074A (en) * | 2014-11-11 | 2015-01-21 | 杭州华普永明光电股份有限公司 | Direct-drive LED (Light Emitting Diode) illuminating system controlled by integrated control circuit |
| CN104320891A (en) * | 2014-11-11 | 2015-01-28 | 杭州华普永明光电股份有限公司 | Direct drive LED lighting system controlled by integrated control circuit |
| CN104320890A (en) * | 2014-11-11 | 2015-01-28 | 杭州华普永明光电股份有限公司 | High-voltage direct-drive LED illuminating system |
| CN104320892A (en) * | 2014-11-11 | 2015-01-28 | 杭州华普永明光电股份有限公司 | Direct drive LED lighting system controlled by integrated control circuit |
| 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 |
| CN106954304A (en) * | 2017-04-05 | 2017-07-14 | 安徽卓越电气有限公司 | A kind of large power long life-span AC LED lamp drive control circuit |
| CN112118654A (en) * | 2019-06-19 | 2020-12-22 | 晟美光电有限公司 | Three-phase power supply driving light-emitting diode circuit device |
| 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 |
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| 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 |
| CN106954304A (en) * | 2017-04-05 | 2017-07-14 | 安徽卓越电气有限公司 | A kind of large power long life-span AC LED lamp drive control circuit |
| CN112118654A (en) * | 2019-06-19 | 2020-12-22 | 晟美光电有限公司 | Three-phase power supply driving light-emitting diode circuit device |
| 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 |
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