Design of Integrated Lighting Power Supply Heat Dissipation

doi:10.16628/j.cnki.2095-8188.2022.12.006

Abstract

Abstract:

In order to solve the problem of the large size of the lighting lamp caused by the heat dissipation of the power supply,the heat dissipation of the power supply of the integrated lighting lamp is designed.First,the structure of the lamp is analyzed.Then,the losses of the power transformer and MOSFET are theoretically analyzed and calculated respectively using empirical formulas,and the simulation calculation of the temperature field of the power supply as a whole is completed using finite element software.Finally,the thermal design of the power supply is completed by redesigning the device of switching layout and transformer with the goal of minimizing the volume of the lighting lamp.The results show that the temperature rise of most compouents of the power supply has decreased after the thermal design,and the volume of the lighting lamp has decreased by 31.36%.The proposed heat dissipation design scheme effectively reduces the temperature rise of the power supply and the size of the lighting lamp.

Key words: integrated lighting power supply, loss analysis, temperature fieldsimulation, heat dissipation design

CLC Number:

TM464

YANG Kun, MA Shaohua, PANG Zheyuan, FENG Yuning. Design of Integrated Lighting Power Supply Heat Dissipation[J]. LOW VOLTAGE APPARATUS, 2022, 0(12): 32-37.

Figures/Tables 12

References 16

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负载/ Ω	输入功率/W	输出电流/mA	输出功率/W	效率	功率因数
10	0.989	281	0.790	0.846	0.943
20	2.030	286	1.636	0.848	0.950
50	5.060	287	4.118	0.852	0.954
80	8.120	288	6.636	0.854	0.957
100	10.390	292	8.526	0.856	0.959
120	12.530	294	10.372	0.860	0.962
150	15.710	295	13.054	0.862	0.963

尺寸	改进前	改进后
长度/mm	157	136.5
宽度/mm	112	112
高度/mm	38	30
体积/mm³	668 192	458 640

器件	环境温度
器件	26.7	30.5	35.0
变压器	64.1	68.0	72.4
MOS1	46.2	50.2	54.8
MOS2	45.7	49.8	54.3
MOS3	45.1	49.1	53.7
二极管	52.8	56.6	61.1
整流桥	54.4	58.4	62.1