High-efficiency multifunctional lighting device

A lighting device and a multi-functional technology, applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components, etc., can solve the problems of low power density, switching loss, high loss, improve working life and Reliability, meeting paper requirements, high power density

Inactive Publication Date: 2015-08-26
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 desk lamp using the switching power supply used in the above desk lamp has switching loss, an impulse voltage generated when the switching element is disconnected, and poor stability of the desk lamp caused by v

Method used

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] Such as figure 1 As shown, the three-phase resonant converter of the switching power supply in the desk lamp of the present invention includes input voltage Uin, primary side and secondary side all have the transformer T of middle tap, switching element S1, S2, S3, S4, S5, S6, S7 . Parasitic capacitance, 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;

[0035] The anode of the diode D1 is connected to the anode of the diode D1 by the opposite end of the upper half winding of the middle tap of the primary winding, the same end of the lower half of the winding of the middle tap of the primary winding is connected to the anode of the diode D2, and the same name end ...

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PUM

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Abstract

The invention provides a high-efficiency multifunctional lighting device comprising a lighting device pedestal, a switching power supply, a lamp post and a lamp head which is installed at the top end of the lamp post. The switching power supply comprises a three-phase resonant converter which is provided with a center-tapped transformer. According to the high-efficiency multifunctional lighting device provided with the switching power supply having the three-phase resonant converter with the center-tapped transformer, loss is low and power density is high so that the service life and reliability of the lighting device can be enhanced and the requirement of users for paper at any time can be met.

Description

technical field [0001] The invention belongs to the field of lighting tools, in particular to an efficient and multifunctional lighting device. Background technique [0002] Desk lamps have already become a necessity for people's life and study, especially for students and working families who need to study at home. [0003] At present, traditional desk lamps often use switching power supplies to switch on and off while satisfying the functions of lighting tools. The working process of switching power supplies used in traditional desk lamps is through "chopping", that is, chopping the input DC voltage into amplitudes equal to The pulse voltage of the input voltage amplitude is realized. 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 windings of...

Claims

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Application Information

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IPC IPC(8): H02M7/00
Inventor 杨慧萌
Owner 武汉绿鼎天舒科技发展有限公司
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