电梯轿厢无随行电缆非接触供电系统设计

Design of Contactless Power System of Elevator Car Without Traveling Cable

电梯轿厢随行电缆有碍美观且需要定期维护,为了摆脱对随行电缆的依赖,设计了一种新颖的电梯轿厢无随行电缆非接触供电系统,采用高频松耦合变压器实现电能的非接触传输.电梯轿厢升降运动时利用蓄电池的储能供电,非接触供电系统处于关闭状态;在每个楼层平层静止时,系统收到电梯平层信号,系统启动供电并对蓄电池充电.这种供电方式可以提高供电效率,减少高频电磁污染.分析了松耦合变压器的等效电路模型,研究了工作气隙、工作频率、补偿电容等对供电效率的影响.根据系统要求设计了简单高效的大功率开关电源充电器,稳压效果好,可靠性高.

The cable traveling with the elevator car is not aesthetic and needs a periodic maintenance. In order to be freed from the cable,this paper designed a novel contactless power system of elevator car without traveling cable,realized the functions of contactless energy transmission by using high frequency loosely coupled transformer. The elevator car uses electricity from lead-acid batteries when it moves vertically,and the contactless energy transmission is closure. When the elevator car stopping at any floor,the contactless power system receives the arrival signal,resumes energy transmission and charges lead-acid batteries. This idea can improve the power supply efficiency and decrease the high frequency electromagnetic pollution. This paper analyzed the equivalent circuit model of loosely coupled transformer,and the influence of the working air gap,operating frequency,compensating capacitor and so on to the supply efficiency was also studied. Finally,we designed asimple and efficient charger of high-power switching power supply,which had a better effect in voltage regulation characteristics and a high reliability in work.