CN215647488U - Adjustable driving circuit of LED lamp bank and lamp bank using same - Google Patents
Adjustable driving circuit of LED lamp bank and lamp bank using same Download PDFInfo
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- CN215647488U CN215647488U CN202121013832.9U CN202121013832U CN215647488U CN 215647488 U CN215647488 U CN 215647488U CN 202121013832 U CN202121013832 U CN 202121013832U CN 215647488 U CN215647488 U CN 215647488U
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Abstract
The utility model discloses an adjustable drive circuit of an LED lamp bank and a lamp bank using the circuit, wherein the circuit comprises: the device comprises a voltage limiting circuit, a rectifying circuit, a filter circuit, a shunt circuit, a lamp group and an alternating current power supply; the first end of the voltage limiting circuit is connected with a live wire of an alternating current power supply, and the second end of the voltage limiting circuit is connected with the first end of the rectifying circuit; the second end of the rectifying circuit is connected with the first end of the filter circuit; the second end of the filter circuit is connected with the first end of the shunt circuit, and the second end of the shunt circuit is connected with the anode of the lamp bank; the negative electrode of the lamp group, the third end of the shunt circuit, the third end of the filter circuit and the third end of the rectifying circuit are connected with the ground; and the fourth end of the rectifying circuit is connected with a zero line of an alternating current power supply. The adjustable driving circuit of the LED lamp set and the lamp set using the circuit not only realize constant-current light emission, but also realize adjustable light intensity, improve power supply stability, improve light color and prolong service life.
Description
Technical Field
The utility model relates to the technical field of lighting, in particular to an adjustable driving circuit of an LED lamp bank and the lamp bank using the circuit.
Background
The ideal Light Emitting Diode (LED) lamp bank power supply circuit should be a constant current circuit, preferably powered by an ideal dc current source. Good lighting effect can be obtained without ripple of the current. The greater the number of LEDs in a group, the greater the illumination. In order to reduce cost, an LC filter circuit is not usually adopted in an existing LED lamp bank power supply circuit powered by a 220V single-phase alternating-current voltage source, so that the lamp bank power supply circuit has large ripple waves of power supply current, poor light color, accelerated aging, short service life, large impact of electrifying current, serious flicker and very poor user experience. And often because overvoltage impact problem when the electricity is on causes voltage limiting capacitor breakdown and LED burnout, and then causes AC power supply short circuit tripping, and the trouble is difficult to check.
In sum, the existing power supply circuit of the LED lamp set needs to be improved and designed.
SUMMERY OF THE UTILITY MODEL
The utility model provides an adjustable driving circuit of an LED lamp set and the lamp set using the circuit, aiming at the problems in the prior art, so that constant-current light emitting is realized, the light intensity is adjustable, the power supply stability is improved, the light color is improved, and the service life is prolonged.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
the utility model provides an adjustable drive circuit of an LED lamp bank, which comprises: the device comprises a voltage limiting circuit, a rectifying circuit, a filter circuit, a shunt circuit, a lamp group and an alternating current power supply; wherein,
the first end of the voltage limiting circuit is connected with a live wire of the alternating current power supply, and the second end of the voltage limiting circuit is connected with the first end of the rectifying circuit;
the second end of the rectifying circuit is connected with the first end of the filter circuit;
the second end of the filter circuit is connected with the first end of the shunt circuit, and the second end of the shunt circuit is connected with the anode of the lamp bank;
the negative electrode of the lamp group, the third end of the shunt circuit, the third end of the filter circuit and the third end of the rectifying circuit are respectively connected with the ground;
and the fourth end of the rectifying circuit is connected with a zero line of the alternating current power supply.
Preferably, the voltage limiting circuit includes: a first resistor and a first capacitor;
the rectifier circuit includes: a first diode, a second diode, a third diode and a fourth diode;
the filter circuit includes: the first inductor, the second inductor and the second capacitor;
the shunt circuit includes: the voltage regulator comprises a potentiometer, a second resistor, a third resistor, a fourth resistor, a voltage regulator tube and a triode; wherein,
the first end of the first resistor is connected with the first end of the first capacitor and then connected with a live wire of the alternating current power supply;
the second end of the first resistor is connected with the second end of the first capacitor and then respectively connected with the anode of the first diode and the cathode of the second diode;
the cathode of the first diode is connected with the cathode of the third diode and then connected with the first end of the first inductor;
the second end of the first inductor is respectively connected with the first end of the second inductor and the first end of the second capacitor;
the second end of the second inductor is respectively connected with the first end of the potentiometer, the collector of the triode and the anode of the lamp bank;
the second end of the potentiometer is connected with the first end of the second resistor; the second end of the second resistor is respectively connected with the first end of the third resistor, the first end of the fourth resistor and the cathode of the voltage regulator tube;
the second end of the third resistor is connected with the base electrode of the triode;
the negative electrode of the lamp group, the emitting electrode of the triode, the second end of the fourth resistor, the anode of the voltage regulator tube, the anode of the fourth diode and the anode of the second diode are respectively connected with the ground;
and the anode of the third diode is connected with the cathode of the fourth diode and then is connected with the zero line of the alternating current power supply.
Preferably, the voltage limiting circuit includes: a first resistor and a first capacitor;
the rectifier circuit includes: a first diode, a second diode, a third diode and a fourth diode;
the filter circuit includes: the temperature sensor comprises a negative temperature coefficient resistor, a first inductor, a second inductor and a second capacitor;
the shunt circuit includes: the voltage regulator comprises a potentiometer, a second resistor, a third resistor, a fourth resistor, a voltage regulator tube and a triode; wherein,
the first end of the first resistor is connected with the first end of the first capacitor and then connected with a live wire of the alternating current power supply;
the second end of the first resistor is connected with the second end of the first capacitor and then respectively connected with the anode of the first diode and the cathode of the second diode;
the cathode of the first diode is connected with the cathode of the third diode and then connected with the first end of the negative temperature coefficient resistor;
the second end of the negative temperature coefficient resistor is connected with the first end of the first inductor;
the second end of the first inductor is respectively connected with the first end of the second inductor and the first end of the second capacitor;
the second end of the second inductor is respectively connected with the first end of the potentiometer, the collector of the triode and the anode of the lamp bank;
the second end of the potentiometer is connected with the first end of the second resistor; the second end of the second resistor is respectively connected with the first end of the third resistor, the first end of the fourth resistor and the cathode of the voltage regulator tube;
the second end of the third resistor is connected with the base electrode of the triode;
the negative electrode of the lamp group, the emitting electrode of the triode, the second end of the fourth resistor, the anode of the voltage regulator tube, the anode of the fourth diode and the anode of the second diode are respectively connected with the ground;
and the anode of the third diode is connected with the cathode of the fourth diode and then is connected with the zero line of the alternating current power supply.
Preferably, the value of the first capacitor is far smaller than that of the second capacitor, most of alternating voltage can be shared, and the first resistor connected in parallel is used for releasing energy stored by the first capacitor after power failure, so that safety regulations are met.
Preferably, the light set comprises two or more LEDs;
two or more LEDs are connected in series in the same direction.
The utility model also provides a lamp group using the adjustable driving circuit of the LED lamp group, which comprises the adjustable driving circuit of the LED lamp group.
Compared with the prior art, the utility model has the following advantages:
(1) the adjustable driving circuit of the LED lamp set and the lamp set using the circuit provided by the utility model are realized through the voltage limiting circuit, the rectifying circuit, the filtering circuit and the shunt circuit, the light intensity is adjustable, the power supply stability is improved, the light color is improved, and the service life is prolonged;
(2) according to the adjustable driving circuit of the LED lamp set and the lamp set using the circuit, the LED lamp set is actually powered by relatively straight direct current through the filter circuit, the problem of ripple current stroboscopic is solved, the lighting effect is improved, and the comfort level is improved;
(3) according to the adjustable driving circuit of the LED lamp set and the lamp set using the circuit, through the action of the voltage limiting circuit, the rectifying circuit and the filter circuit, the power-on impact current cannot exist during power-on, so that the brightness and the influence on the service life are eliminated, the problem of power supply short circuit caused by the fact that the first capacitor is repeatedly impacted and damaged in advance is prevented, and the service life is prolonged;
(4) according to the adjustable driving circuit of the LED lamp set and the lamp set using the circuit, the negative temperature coefficient resistor plays a role in electrifying and current limiting, the resistance value is reduced to zero during normal work, and the normal work is not affected.
Of course, it is not necessary for any product in which the utility model is practiced to achieve all of the above-described advantages at the same time.
Drawings
Embodiments of the utility model are further described below with reference to the accompanying drawings:
fig. 1 is a diagram of an adjustable driving circuit of an LED lamp set according to a preferred embodiment of the utility model.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Fig. 1 is a diagram of an adjustable driving circuit of an LED lamp set according to a preferred embodiment of the utility model.
In one embodiment, an adjustable driving circuit diagram of an LED lamp set comprises: the device comprises a voltage limiting circuit, a rectifying circuit, a filter circuit, a shunt circuit, a lamp group and an alternating current power supply; wherein,
the first end of the voltage limiting circuit is connected with a live wire of the alternating current power supply, and the second end of the voltage limiting circuit is connected with the first end of the rectifying circuit;
the second end of the rectifying circuit is connected with the first end of the filter circuit;
the second end of the filter circuit is connected with the first end of the shunt circuit, and the second end of the shunt circuit is connected with the anode of the lamp bank;
the negative electrode of the lamp group, the third end of the shunt circuit, the third end of the filter circuit and the third end of the rectifying circuit are connected with the ground;
and the fourth end of the rectifying circuit is connected with a zero line of an alternating current power supply.
In the above embodiment, the voltage limiting circuit is configured to limit a post-stage power supply voltage, the rectifying circuit is configured to convert an ac voltage into a dc voltage, the filtering circuit is configured to obtain a constant current source, and the shunt circuit is configured to bypass a current of the LED lamp set, so that the current of the LED lamp set is adjustable, and the lamp set is a final load.
Referring to fig. 1, the voltage limiting circuit of the present embodiment includes: a first resistor R1 and a first capacitor C1;
the rectifier circuit includes: a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4;
the filter circuit includes: the negative temperature coefficient resistor NTC1, the first inductor L1, the second inductor L2 and the second capacitor C2;
the shunt circuit includes: the voltage regulator comprises a potentiometer PT1, a second resistor R2, a third resistor R3, a fourth resistor R4, a voltage regulator tube ZD1 and a triode T1;
the lamp set of this embodiment takes two LEDs as an example: LED1, LED 2; wherein,
the first end of the first resistor R1 is connected with the first end of the first capacitor C1 and then connected with the AC power source uiThe live wires are connected;
a second end of the first resistor R1 is connected to a second end of the first capacitor C1 and then connected to an anode of the first diode D1 and a cathode of the second diode D2, respectively;
the cathode of the first diode D1 is connected with the cathode of the third diode D3 and then connected with the first end of the negative temperature coefficient resistor NTC 1;
a second end of the negative temperature coefficient resistor NTC1 is connected with a first end of the first inductor L1;
the second end of the first inductor L1 is connected to the first end of the second inductor L2 and the first end of the second capacitor C2, respectively;
a second end of the second inductor L2 is connected to the first end of the potentiometer PT1, the collector of the transistor T1, and the anode of the LED1, respectively;
a second end of the potentiometer PT1 is connected with a first end of a second resistor R2; the second end of the second resistor R2 is respectively connected with the first end of the third resistor R3, the first end of the fourth resistor R4 and the cathode of the voltage regulator tube ZD 1;
the second end of the third resistor R3 is connected with the base of the triode T1;
the cathode of the LED1 is connected to the anode of the LED 2;
the cathode of the LED2, the emitter of the triode T1, the second end of the fourth resistor R4, the anode of the voltage regulator tube ZD1, the anode of the fourth diode D4 and the anode of the second diode D2 are respectively connected with the ground;
the anode of the third diode D3 is connected to the cathode of the fourth diode D4 and then connected to the AC power source uiIs connected with the zero line.
In a preferred embodiment, the value of the first capacitor is much smaller than the value of the second capacitor.
In various embodiments, the filter circuit may not include the negative temperature coefficient resistor NTC1, and the first diode D1 is connected to the cathode of the third diode D3 and then directly connected to the first terminal of the first inductor L1.
In various embodiments, the light set may also include more than two LEDs.
The embodiment is a preferred embodiment, in the voltage limiting circuit, the value of the first capacitor is far smaller than that of the second capacitor, most of alternating voltage can be shared, and the first resistor connected in parallel is used for releasing energy stored by the first capacitor after power failure, so that safety regulations are met. In the rectifying circuit, the alternating voltage can be rectified into direct voltage so as to provide direct current for the subsequent lamp group. In the filter circuit, a relatively straight direct current is obtained through a primary LC filter and an equivalent resistor of a primary inductor and the LED lamp set. The shunt circuit can continuously and linearly adjust the emitter current of the first triode so as to adjust the current of the lamp bank and adjust the light intensity.
The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and not to limit the utility model. Any modifications and variations within the scope of the description, which may occur to those skilled in the art, are intended to be within the scope of the utility model.
Claims (6)
1. An adjustable driving circuit of an LED lamp group is characterized by comprising: the device comprises a voltage limiting circuit, a rectifying circuit, a filter circuit, a shunt circuit, a lamp group and an alternating current power supply; wherein,
the first end of the voltage limiting circuit is connected with a live wire of the alternating current power supply, and the second end of the voltage limiting circuit is connected with the first end of the rectifying circuit;
the second end of the rectifying circuit is connected with the first end of the filter circuit;
the second end of the filter circuit is connected with the first end of the shunt circuit, and the second end of the shunt circuit is connected with the anode of the lamp bank;
the negative electrode of the lamp group, the third end of the shunt circuit, the third end of the filter circuit and the third end of the rectifying circuit are respectively connected with the ground;
and the fourth end of the rectifying circuit is connected with a zero line of the alternating current power supply.
2. The adjustable driving circuit of LED lamp set according to claim 1, wherein the voltage limiting circuit comprises: a first resistor and a first capacitor;
the rectifier circuit includes: a first diode, a second diode, a third diode and a fourth diode;
the filter circuit includes: the first inductor, the second inductor and the second capacitor;
the shunt circuit includes: the voltage regulator comprises a potentiometer, a second resistor, a third resistor, a fourth resistor, a voltage regulator tube and a triode; wherein,
the first end of the first resistor is connected with the first end of the first capacitor and then connected with a live wire of the alternating current power supply;
the second end of the first resistor is connected with the second end of the first capacitor and then respectively connected with the anode of the first diode and the cathode of the second diode;
the cathode of the first diode is connected with the cathode of the third diode and then connected with the first end of the first inductor;
the second end of the first inductor is respectively connected with the first end of the second inductor and the first end of the second capacitor;
the second end of the second inductor is respectively connected with the first end of the potentiometer, the collector of the triode and the anode of the lamp bank;
the second end of the potentiometer is connected with the first end of the second resistor; the second end of the second resistor is respectively connected with the first end of the third resistor, the first end of the fourth resistor and the cathode of the voltage regulator tube;
the second end of the third resistor is connected with the base electrode of the triode;
the negative electrode of the lamp group, the emitting electrode of the triode, the second end of the fourth resistor, the anode of the voltage regulator tube, the anode of the fourth diode and the anode of the second diode are respectively connected with the ground;
and the anode of the third diode is connected with the cathode of the fourth diode and then is connected with the zero line of the alternating current power supply.
3. The adjustable driving circuit of LED lamp set according to claim 1, wherein the voltage limiting circuit comprises: a first resistor and a first capacitor;
the rectifier circuit includes: a first diode, a second diode, a third diode and a fourth diode;
the filter circuit includes: the temperature sensor comprises a negative temperature coefficient resistor, a first inductor, a second inductor and a second capacitor;
the shunt circuit includes: the voltage regulator comprises a potentiometer, a second resistor, a third resistor, a fourth resistor, a voltage regulator tube and a triode; wherein,
the first end of the first resistor is connected with the first end of the first capacitor and then connected with a live wire of the alternating current power supply;
the second end of the first resistor is connected with the second end of the first capacitor and then respectively connected with the anode of the first diode and the cathode of the second diode;
the cathode of the first diode is connected with the cathode of the third diode and then connected with the first end of the negative temperature coefficient resistor;
the second end of the negative temperature coefficient resistor is connected with the first end of the first inductor;
the second end of the first inductor is respectively connected with the first end of the second inductor and the first end of the second capacitor;
the second end of the second inductor is respectively connected with the first end of the potentiometer, the collector of the triode and the anode of the lamp bank;
the second end of the potentiometer is connected with the first end of the second resistor; the second end of the second resistor is respectively connected with the first end of the third resistor, the first end of the fourth resistor and the cathode of the voltage regulator tube;
the second end of the third resistor is connected with the base electrode of the triode;
the negative electrode of the lamp group, the emitting electrode of the triode, the second end of the fourth resistor, the anode of the voltage regulator tube, the anode of the fourth diode and the anode of the second diode are respectively connected with the ground;
and the anode of the third diode is connected with the cathode of the fourth diode and then is connected with the zero line of the alternating current power supply.
4. The adjustable driving circuit of the LED lamp set according to claim 2 or 3, wherein a value of the first capacitor is much smaller than a value of the second capacitor.
5. The adjustable driving circuit of LED lamp set according to claim 1, wherein the lamp set comprises two or more LEDs;
two or more LEDs are connected in series in the same direction.
6. A lamp group using an adjustable drive circuit for an LED lamp group, comprising: the adjustable driving circuit of the LED lamp set as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121013832.9U CN215647488U (en) | 2021-05-12 | 2021-05-12 | Adjustable driving circuit of LED lamp bank and lamp bank using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121013832.9U CN215647488U (en) | 2021-05-12 | 2021-05-12 | Adjustable driving circuit of LED lamp bank and lamp bank using same |
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| Publication Number | Publication Date |
|---|---|
| CN215647488U true CN215647488U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121013832.9U Expired - Fee Related CN215647488U (en) | 2021-05-12 | 2021-05-12 | Adjustable driving circuit of LED lamp bank and lamp bank using same |
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| CN (1) | CN215647488U (en) |
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- 2021-05-12 CN CN202121013832.9U patent/CN215647488U/en not_active Expired - Fee Related
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Granted publication date: 20220125 |