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LED energy saving lamp of power factor compensation type driven by constant-current

A power factor compensation, constant current drive technology, applied in lighting devices, energy-saving control technology, output power conversion devices, etc., can solve the problem of insufficient overall efficiency of LED energy-saving lighting, achieve absorption of harmful pulses, improve harmonic currents , the effect of improving the power factor

Inactive Publication Date: 2008-10-15
张亦翔
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problem that the overall efficiency of the LED energy-saving lighting lamp is not high enough when the LED is lighted by the DC constant current driving method on the market

Method used

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  • LED energy saving lamp of power factor compensation type driven by constant-current
  • LED energy saving lamp of power factor compensation type driven by constant-current
  • LED energy saving lamp of power factor compensation type driven by constant-current

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Embodiment Construction

[0018] 1. see image 3 The circuit schematic diagram of the first embodiment of the DC constant current driving method scheme of the present invention. The operating current of the selected low-power white LED is I F =30mA, forward voltage drop V F =3V, N is 10, get K=0.84 by formula 2, get C1=I by formula 1 F / K(V AC -N·V F )ω=0.6E-6(F), C1 can be 0.6uF / 630V, C2 can be 0.6uF / 250V, C3 can be 22uF, resistor R1 is to discharge C1 when the AC power is disconnected, and can be 2.2MΩ.

[0019] The constant current source Io that plays a protective role limits the DC current flowing through the LED, which is taken as 30mA here, and can be calculated as R3=20Ω by substituting it into (Formula 3). DZ1 setting ratio N V F 1-3 volts higher, DZ1 can choose 33V / 2W or P6KE33A (33V / 5W, instantaneous peak power 600W / 1ms), and the withstand voltage of constant current tube Q1 is greater than 30V, because the voltage at both ends is not high and the current is not large Choose 2N9012; the...

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Abstract

The invention relates to an LED energy-saving illuminating lamp driven by the constant current, which is applied to the power-factor compensation of an AC power grid. In order to realize the purpose of compensation, the technical solution proposal of the invention is that: the AC commercial power lights the LED energy-saving illuminating lamp by utilizing the capacitance to reduce the voltage, limit and commutate the current and filter the constant current so as to drive the illuminating lamp. In the AC power grid, the LED energy-saving illuminating lamp of the invention is capacitive and has the function of the power-factor compensation. The LED is preferably driven by the direct current and the constant current since the driving manner can not only ensure that the LED can work in a best state, but also completely eliminate the weakness of stroboflash of the LED illuminating lamp to protect the eyesight. The LED energy-saving illuminating lamp of the invention solves the problems that the overall efficiency of the LED energy-saving illuminating lamp is not high when the illuminating lamp in the current market is lighted by being driven by the direct current and the constant current. The invention is served as the LED energy-saving illuminating lamp as well as a power factor compensator. When the invention is served as the LED energy-saving illuminating lamp driven by the constant current, the illuminating lamp has the advantages of low power consumption, high brightness, long service life and no stroboflash; when the invention is served as the power factor compensator, the compensator can improve the power factor.

Description

technical field [0001] The invention relates to an LED energy-saving lighting lamp suitable for AC grid power factor compensation, in particular to a power factor compensation type constant current drive LED energy-saving lighting lamp, which is both an LED energy-saving lighting lamp and a power factor compensator. Background technique [0002] Global energy is facing a crisis. In order to effectively use energy, the International Electrotechnical Commission (I.E.C) has formulated a series of specifications for the power supply of electrical appliances. IEC-1000 is the specification for harmonic current in power supply, and the power factor compensation method is currently the most effective. One of the methods, the reactive power compensation equipment commonly used by power users is capacitors. The so-called power factor is the ratio of useful work to total power, that is, the ratio of useful work to the sum of active work and the vector sum of useless work. The power f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/08H02M1/42H02M1/14H05B37/00G05F3/18
CPCY02B20/42Y02B70/126Y02B20/40Y02B70/10
Inventor 张亦翔张飞然
Owner 张亦翔
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