Dimming circuit for electromagnetic induction lamp

An electromagnetic induction lamp and dimming circuit technology, applied in the field of dimming circuit, can solve the problems of no dimming, long switching time, high temperature of MOS tube, etc.

Inactive Publication Date: 2004-12-29
SHANGHAI HONGYUAN LIGHTING & ELECTRICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When working, the temperature of the MOS tubes 100 and 102 is high due to the long switching time of the circuit. At the same time, the L6570 is now used as the central processing unit with a single function, no dim

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  • Dimming circuit for electromagnetic induction lamp
  • Dimming circuit for electromagnetic induction lamp
  • Dimming circuit for electromagnetic induction lamp

Examples

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[0030] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0031] figure 2 It is a block diagram of part of the circuit of the electromagnetic induction lamp of the present invention, such as figure 2 As shown, the dimming circuit of the present invention is connected to the electromagnetic induction lamp circuit. The electromagnetic induction lamp circuit should at least include an active power factor corrector 200, a central processing unit 202, an electromagnetic sensor 204 and a power output unit 206. figure 2 In the illustrated embodiment, the active power factor corrector 200 is connected to the power follower 206, which provides a stable DC voltage for the subsequent circuit. The electromagnetic sensor 204 is also connected to the power output 206 and also connected to the electromagnetic induction lamp tube (not shown in the figure). The power follower 206 is used to provide output power. ...

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Abstract

The invention discloses a light modulation circuit of an electromagnetic induction lamp which comprises a closed-loop light modulation control signal device, a lamp power feedback compensation device, a resistance-capacitance oscillation timer, a lamp current sampling signalizer and a lamp voltage sampling signalizer. The invention can realize the operation status monitoring and real time adjustment.

Description

technical field [0001] The invention relates to an electromagnetic induction lamp circuit, in particular to a dimming circuit used in an electromagnetic induction lamp circuit. Background technique [0002] Electromagnetic induction lamps are a new generation of energy-saving products with no filament, high luminous efficiency, long life, and high power factor. They can be widely used in homes, factories, offices, roads, engineering construction sites, especially places where lamp tubes are not suitable for replacement. Since the electromagnetic induction lamp is started and ignited without poles, there is no phenomenon that the whole lamp will be scrapped due to the damage of the filament or the exhaustion of the electron powder emission and the blackening of the lamp tube due to the sputtering of the electron powder, and the life of the whole lamp is greatly extended. And the working frequency exceeds 200KHz, which can eliminate the stroboscopic phenomenon. However, the c...

Claims

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Application Information

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IPC IPC(8): H05B41/28H05B41/282
CPCH05B41/282H05B41/28
Inventor 李维德
Owner SHANGHAI HONGYUAN LIGHTING & ELECTRICAL EQUIP
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