CN201388323Y - LED high-voltage type constant-current driving power supply with power factor compensation - Google Patents
LED high-voltage type constant-current driving power supply with power factor compensation Download PDFInfo
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- CN201388323Y CN201388323Y CN200920126684U CN200920126684U CN201388323Y CN 201388323 Y CN201388323 Y CN 201388323Y CN 200920126684 U CN200920126684 U CN 200920126684U CN 200920126684 U CN200920126684 U CN 200920126684U CN 201388323 Y CN201388323 Y CN 201388323Y
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Abstract
The utility model relates to an LED high-voltage type constant-current driving power supply with power factor compensation, which comprises a power supply rectifying unit and an output circuit unit, wherein the power source rectifying unit is connected with alternating current, the output power supply unit is connected with LED load, because a feedback control circuit module is arranged between the power source rectifying unit and the output circuit unit, the feedback control circuit module realizes sampling, comparing, operating of current or voltage acquired from the power rectifying unit and regulating load working current. When load working current greatly or slightly deviates from a designed value because of certain reasons, the feedback control circuit module regulates output voltage so as to enable load working current to return to the designed value, thereby completing constant current function, guaranteeing the special light source device, namely the LED to work stably and reliably, and then achieving purposes of stabilizing light intensity of the light source and light spectrum, prolonging the service life of the light source, and simultaneously being favorable for increasing utilization rate of electric energy of a power grid.
Description
[technical field]
The utility model relates to a kind of LED high voltage type constant-current driving power supply with power factor compensation.
[background technology]
The driving power circuit that various high voltage type are arranged on the existing market, its major part can be divided into driving power circuit with no constant current function, the constant current function is arranged and the driving power circuit of inactivity factor compensate function and have only constant voltage not have the driving power circuit of constant current function.The driving power circuit that wherein has no constant current function, its temperature can raise with the increase of electric current when making LED work easily, causes the LED forward voltage to raise with temperature and reduces.Have only constant voltage not have the driving power circuit of constant current function, the LED operating current is increased, cause the LED temperature further to rise, form vicious circle, LED is shortened useful life greatly.Have only the constant current function and the driving power circuit of inactivity factor compensation, make 50 watts of LED lamp actual power consumptions will consume 100 volt-amperes from electrical network, the electrical network utilization rate of electrical only is 50%, makes that the electrical network utilization rate of electrical is low.
[utility model content]
Technical purpose of the present utility model is to provide a kind of LED high voltage type constant-current driving power supply with power factor compensation that can stablize LED lamp source light intensity and spectrum, prolongation LED useful life and raising electrical network utilization rate of electrical for the problem that solves above-mentioned prior art existence.
In order to realize above-mentioned technical problem, the utility model provides a kind of LED high voltage type constant-current driving power supply with power factor compensation, it comprises power rectifier unit that links to each other with AC power and the out-put supply unit that links to each other with the LED load, between power rectifier unit and output circuit unit, be provided be used to take a sample, the feedback control circuit module of comparison, computing and adjusting.
According to above-mentioned major technique feature, described feedback control circuit module comprise the compensation sampling unit that links to each other with the power rectifier unit, with compensate computing and power factor compensation unit that sampling unit links to each other, be connected in the output control unit of computing and power factor compensation unit output and be connected to computing and the power factor compensation unit on constant current control unit, over-current protecting unit.
According to above-mentioned major technique feature, the output of described output control unit, over-current protecting unit and constant current control unit is connected on the output circuit unit jointly.
Useful technique effect of the present utility model: because of between power rectifier unit and output circuit unit, being provided with the feedback control circuit module, this feedback control circuit module to the curtage that takes out from the power rectifier unit take a sample, comparison, computing and regulating load operating current.When the loaded work piece electric current become big because of certain reason or diminish depart from set point the time, the feedback control circuit module is adjusted output voltage, so that the loaded work piece electric current is got back to set point, thereby finish the constant current function, this special light sources device of assurance LED is reliablely and stablely worked, thereby the purpose that reach stabilized light source light intensity and spectrum, increases the service life simultaneously, also helps and improves the electrical network utilization rate of electrical.
Below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail.
[description of drawings]
Fig. 1 is the frame principle figure that has the LED high voltage type constant-current driving power supply of power factor compensation in the utility model.
[embodiment]
Please refer to shown in Figure 1ly, below in conjunction with concrete a kind of LED high voltage type constant-current driving power supply with power factor compensation, it comprises power rectifier unit, out-put supply unit and feedback control circuit module.
Described feedback control circuit module comprise the compensation sampling unit that links to each other with the power rectifier unit, the computing and the power factor compensation unit that link to each other with the compensation sampling unit, be connected in the output control unit of computing and power factor compensation unit output and be connected to computing and the power factor compensation unit on constant current control unit, over-current protecting unit.The output of described output control unit, over-current protecting unit and constant current control unit is connected on the output circuit unit jointly.
Be connected with AC power on the input of power rectifier unit, the output of power rectifier unit is connected on the feedback control circuit module and is arranged at the compensation sampling unit input end of feedback control circuit inside modules, and the output of compensation sampling unit is connected with the input of computing and power factor compensation unit.The output of this computing and power factor compensation unit is connected with the input of output control unit, and the output of output control unit is connected on the input of output circuit module, is connected with the LED load on the output of output circuit module.The output of the output of over-current protecting unit and constant current control unit is connected on computing and the power back-off factor unit jointly, and the input of the input of over-current protecting unit and constant current control unit is connected on the output circuit unit.
AC power is supplied with the compensation sampling unit after the rectification of current commutates unit; this compensation sampling unit passes to computing and power factor compensation unit; this power factor compensation unit compares; curtage after the multiplying send the output control circuit unit through output; send output circuit unit to supply with the LED load again; described over-current protecting unit and constant current control unit return to computing in the output circuit unit and the power factor compensation unit compares; if during LED load rated operational current bigger than normal or less than normal; then computing and power factor compensation unit reduce by output unit or compensate to the LED load, make it can carry out operate as normal in rated operational current or voltage range.Based on above-mentioned; curtage after the rectification of current commutates unit is through the compensation sampling; multiplying; factor compensation and overcurrent protection; finish whole power factor compensation functions; the about 400V of direct current behind the power factor compensation is exported to the LED load as this circuit; current sampling by to the LED loaded work piece time; feed back to the feedback control circuit module; this feedback control circuit module compares sampling current; computing; the regulating load operating current; when the LED load current becomes big (or diminishing) when departing from set point because of certain reason; the feedback control circuit module can be adjusted output voltage; so that the LED load current is got back to set point; thereby finish the constant current function, this special light sources device of assurance LED load is reliablely and stablely worked, and reaches stabilized light source light intensity and spectrum; the purpose that increases the service life.
In sum, because of between power rectifier unit and output circuit unit, being provided with the feedback control circuit module, this feedback control circuit module to the curtage that takes out from the power rectifier unit take a sample, comparison, computing and regulating load operating current.When the loaded work piece electric current become big because of certain reason or diminish depart from set point the time, the feedback control circuit module is adjusted output voltage, so that the loaded work piece electric current is got back to set point, thereby finish the constant current function, this special light sources device of assurance LED is reliablely and stablely worked, thereby the purpose that reach stabilized light source light intensity and spectrum, increases the service life simultaneously, also helps and improves the electrical network utilization rate of electrical.
Claims (3)
1, a kind of LED high voltage type constant-current driving power supply with power factor compensation, it comprises power rectifier unit that links to each other with AC power and the out-put supply unit that links to each other with the LED load, it is characterized in that: between power rectifier unit and output circuit unit, be provided be used to take a sample, the feedback control circuit module of comparison, computing and adjusting.
2, the LED high voltage type constant-current driving power supply with power factor compensation according to claim 1 is characterized in that: described feedback control circuit module comprise the compensation sampling unit that links to each other with the power rectifier unit, the computing and the power factor compensation unit that link to each other with the compensation sampling unit, be connected in the output control unit of computing and power factor compensation unit output and be connected to computing and the power factor compensation unit on constant current control unit, over-current protecting unit.
3, the LED high voltage type constant-current driving power supply with power factor compensation according to claim 2, it is characterized in that: the output of described output control unit, over-current protecting unit and constant current control unit is connected on the output circuit unit jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920126684U CN201388323Y (en) | 2009-03-19 | 2009-03-19 | LED high-voltage type constant-current driving power supply with power factor compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920126684U CN201388323Y (en) | 2009-03-19 | 2009-03-19 | LED high-voltage type constant-current driving power supply with power factor compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201388323Y true CN201388323Y (en) | 2010-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920126684U Expired - Fee Related CN201388323Y (en) | 2009-03-19 | 2009-03-19 | LED high-voltage type constant-current driving power supply with power factor compensation |
Country Status (1)
| Country | Link |
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| CN (1) | CN201388323Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103155714A (en) * | 2012-03-19 | 2013-06-12 | 叶军 | Led driving chip and circuit with power compensation |
| CN104918391A (en) * | 2015-07-06 | 2015-09-16 | 高志敏 | LED constant-voltage and constant-current driving power supply |
| CN108712802A (en) * | 2018-06-29 | 2018-10-26 | 广州方达舞台设备有限公司 | Stage light regulating system and method |
-
2009
- 2009-03-19 CN CN200920126684U patent/CN201388323Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103155714A (en) * | 2012-03-19 | 2013-06-12 | 叶军 | Led driving chip and circuit with power compensation |
| WO2013138972A1 (en) * | 2012-03-19 | 2013-09-26 | Ye Jun | Led drive chip and circuit with power compensation |
| CN103155714B (en) * | 2012-03-19 | 2015-02-18 | 叶军 | Led driving chip and circuit with power compensation |
| CN104918391A (en) * | 2015-07-06 | 2015-09-16 | 高志敏 | LED constant-voltage and constant-current driving power supply |
| CN108712802A (en) * | 2018-06-29 | 2018-10-26 | 广州方达舞台设备有限公司 | Stage light regulating system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20100319 |