在过去20年中,电梯技术有了飞跃的发展。作为电梯的最基本性能,运输效率和舒适性、可靠性有了显著提高,其中,在电梯的驱动、控制方面进步最为突出。日本电梯发展动态见图1,图2所示。 1965年以前,控制装置还是以电磁元件为主体,当时着力于电磁继电器、平层装置、选择器等的小型化和改善性能。七十年代初,则大力推广晶体管、晶闸管、集成电 In the past 20 years, elevator technology has made great progress. As the most basic performance of the elevator, the transportation efficiency, comfort and reliability have been significantly improved. Among them, the progress in the drive and control of the elevator is the most prominent. The development of Japanese elevators is shown in Figure 1 and Figure 2. Before 1965, the control device was still mainly composed of electromagnetic elements. At that time, efforts were made to reduce the size and improve the performance of electromagnetic relays, leveling devices, and selectors. In the early 1970s, the use of transistors, thyristors, and integrated