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Simulation of filament impedance circuit, led lamp tube and led lighting system

A technology of LED lamp tube and LED lighting, which is applied in the field of lighting and can solve problems affecting the conversion efficiency of lamp tubes

Active Publication Date: 2017-11-10
OPPLE LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Therefore, no analog filament impedance circuit has been proposed so far that can meet the IEC standard test without affecting the conversion efficiency of the lamp tube.

Method used

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  • Simulation of filament impedance circuit, led lamp tube and led lighting system
  • Simulation of filament impedance circuit, led lamp tube and led lighting system
  • Simulation of filament impedance circuit, led lamp tube and led lighting system

Examples

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Effect test

Embodiment 1

[0045] Figure 4 A schematic structural diagram of a circuit for simulating filament impedance according to an embodiment of the present invention is shown. see Figure 4 , the simulated filament impedance circuit includes a first resistor 41 , a second resistor 42 and a first capacitor 43 , where the first resistor 41 and the first capacitor 43 are connected in parallel and then connected in series with the second resistor 42 .

[0046] Figure 4 The expression of the equivalent impedance value Z of the simulated filament impedance circuit shown is:

[0047]

[0048] Wherein, R1 is the resistance of the first resistor 41 , R2 is the resistance of the second resistor 42 , C is the capacitance of the first capacitor 43 , and w is the angular frequency.

[0049] Since the angular frequency w=2πf, where f is the frequency, the expression of the equivalent impedance value Z is:

[0050]

[0051] It can be seen from the expression of the equivalent impedance value Z of th...

Embodiment 2

[0059] Figure 5 A schematic structural diagram of a circuit for simulating filament impedance according to an embodiment of the present invention is shown. see Figure 5 , the simulated filament impedance circuit includes a first resistor 51 , a second resistor 52 and a first capacitor 53 , wherein the first resistor 51 and the first capacitor 53 are connected in series and then connected in parallel with the second resistor 52 .

[0060] Figure 5 The expression of the equivalent impedance value Z of the simulated filament impedance circuit shown is:

[0061]

[0062] Wherein, R1 is the resistance of the first resistor 51 , R2 is the resistance of the second resistor 52 , C is the capacitance of the first capacitor 53 , and w is the angular frequency.

[0063] Since the angular frequency w=2πf, where f is the frequency, the expression of the equivalent impedance value Z is:

[0064]

[0065] It can be seen from the expression of the equivalent impedance value Z of ...

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Abstract

The present invention provides a simulated filament impedance circuit, LED lamp tube and LED lighting system, wherein the simulated filament impedance circuit has a pole frequency and a zero frequency, wherein the pole frequency is less than the zero frequency, and when the input frequency is less than the When the pole frequency is mentioned above, the equivalent impedance value of the analog filament impedance circuit remains unchanged, which is the first equivalent impedance value. When the input frequency is greater than the pole frequency and less than the zero frequency, the equivalent impedance value of the analog filament impedance circuit is The effective impedance value decreases with the increase of the input frequency, and when the input frequency is greater than the zero point frequency, the equivalent impedance value of the analog filament impedance circuit remains unchanged, which is the second equivalent impedance value, and the The first equivalent impedance value is greater than the second equivalent impedance value. The simulated filament impedance circuit provided by the invention can not only meet the requirements of the IEC standard test, but also not affect the conversion efficiency of the lamp tube.

Description

technical field [0001] The invention relates to the lighting field, in particular to an analog filament impedance circuit, an LED lamp tube and an LED lighting system. Background technique [0002] Light Emitting Diode (LED for short) light source has been widely concerned and applied due to its advantages of small size, high brightness, low power consumption and long service life. a trend. [0003] Traditional fluorescent lamps cannot be directly connected to the mains to work, and a ballast needs to be added between the mains and the traditional fluorescent lamps. According to different operating frequencies, ballasts mainly include magnetic ballasts and electronic ballasts. Among them, magnetic ballasts output low-frequency voltage and low-frequency current, generally at 50 / 60Hz, and electronic ballasts output high Frequency voltage and high frequency current, generally above 20kHz. In the prior art, the method of replacing traditional fluorescent lamps with LED lamps ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08F21K9/278F21V23/00F21Y115/10H05B44/00
CPCF21V23/003H05B45/00
Inventor 文威
Owner OPPLE LIGHTING
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