Telescopic lighting device

A technology for lighting devices and switching elements, which is applied to lighting devices, lighting auxiliary devices, components of lighting devices, etc. The effect of improving operating life and reliability

Inactive Publication Date: 2015-10-07
武汉绿鼎天舒科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the lighting device using the switching power supply used in the above-mentioned lighting device has switching loss, a surge voltage that will be generated when the switching element is turned off, and poor working stability of the lighting device caused by voltage instability, high loss, and low power density. The problem of low working life and reliability; and the traditional lighting device that only functions as a lighting tool cannot be adjusted in height, and cannot meet the needs of users of different heights and seat heights for high reliability of desk lamps

Method used

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Embodiment Construction

[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] Such as figure 1 As shown, the three-phase resonant converter of the switching power supply of the high-reliability lighting device of the present invention includes an input voltage Uin, a transformer T with a center tap on both the primary side and the secondary side, switching elements S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, diodes D1, D2, D3, D4, D5, D6, D7, D8, inductors L1, L2, L3 and the controller, each switch tube has an anti-parallel Parasitic diodes and parasitic capacitances, the transformer T has three secondary windings, the first secondary windings are N3 and N4, the second secondary windings are N5 and N6, and the third secondary windings are N7 and N8;

[0034]The anode of the diode D1 is connected to the anode of the diode D1 by the opposite end of the upper half windi...

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PUM

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Abstract

The invention provides a telescopic lighting device, comprising a lamp socket, a lamp holder and a switching power supply, and also comprising a telescoping lamp bracket. The switching power supply comprises a three-phase resonant converter with an intermediate tapped transformer. The telescopic lighting device has the characteristics of low loss and high density, and can prolong a service life, increase reliability, and meet the reliability requirements to a lighting device by users under different environments.

Description

technical field [0001] The invention belongs to the field of lighting tools, in particular to a retractable lighting device. Background technique [0002] Lighting devices have long become a necessity for people's life and study, especially for students and working families who need to study at home. [0003] At present, while satisfying the functions of lighting tools, traditional lighting devices often use switching power supplies to switch on and off. The working process of switching power supplies used in traditional lighting devices is through "chopping", that is, chopping the input DC voltage into amplitudes. This is achieved by a pulse voltage equal to the amplitude of the input voltage. The duty cycle of the pulse is adjusted by the controller of the switching power supply; once the input voltage is chopped into an AC square wave, its amplitude can be increased or decreased by the transformer, and the output can be increased by increasing the number of secondary win...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/00H02M7/537F21V21/22
CPCY02E10/56
Inventor 杨慧萌
Owner 武汉绿鼎天舒科技发展有限公司
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