The testing results indicate that the hoisting time of driving device can meet the practical demands and the positioning mechanism of linear electric motor is free and reliable.

试验结果表明，驱动装置水平布置时，其提升时间满足实际要求；直线电机次级板定位机构动作灵敏可靠。

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In this paper the calculating formulas of drop braking time and braking slipping distance of hoisting mechanism are deduced on the basis of analysing the braking process of hoisting mechanism.

本文在分析起升机构制动过程的基础上，推导出起升机构下降制动时间和制动下滑距离的计算公式。

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Relaxes the brake, the heavy item then voluntarily fast drops, reduces the return trip time, but this kind of hoisting jack structure is complex.

放松制动器，重物即可自行快速下降，缩短返程时间，但这种千斤顶构造较复杂。

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