Structural Design and Analysis of Smart Miniature Circuit Breaker’s Electric Operating Mechanism

doi:10.16628/j.cnki.2095-8188.2023.04.008

Abstract

Abstract:

Smart miniature circuit breakers play an irreplaceable role in some power-consuming places and electrical equipment.Specifically,the structure of the electric operating mechanism for smart miniature circuit breakers is designed,including the layout of position switches,the analysis of operation logic,motor selection,the calculation of gear system transmission ratio and the gear design,etc.The theoretical calculation results are interspersed with the actual product data.References and comparisons are used to verify the feasibility of design methods and design ideas.It can provide reference for the design of similar products and effectively shorten the research and development cycle.

Key words: electric operating mechanism, smart miniature circuit breakers, gear drive, position switch, reduction gear

CLC Number:

TM561

WEI Bo, ZHAO Zhisheng, ZHAO Ming, SHENG Yongbing, REN Changbin. Structural Design and Analysis of Smart Miniature Circuit Breaker’s Electric Operating Mechanism[J]. LOW VOLTAGE APPARATUS, 2023, 0(4): 47-55.

Figures/Tables 14

参数		蜗杆	斜齿轮	传动齿轮	驱动齿轮	手柄齿轮
模数m	主	0.4	0.5	0.6	0.6	—
模数m	从	—	0.4	0.5	0.6	0.6
齿数Z	主	1	11	11	29	—
齿数Z	从	—	36	38	29	29
分度圆直径d/mm	主	4	5.5	6.6	17.4	—
分度圆直径d/mm	从	—	14.4	19	17.4	17.4
压力角 α/(°)	主	20	20	20	20	—
压力角 α/(°)	从	—	20	20	20	20
齿顶高系数 $h a *$	主	1	1	1	1	—
齿顶高系数 $h a *$	从	—	1	1	1	1

References 9

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电气特性指标	工作状态
电气特性指标	空载	堵转	最大效率下	最大功率下
转速/(r·min^-1)	24 294	—	20 545	12 147
电流/A	0.162	4.864	0.888	2.513
力矩/(g·cm)	—	206.23	31.83	103.12
效率/%	—	—	62.7	—
输出功率/W	—	—	6.68	12.79

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