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日本东芝电器公司最近研制成功一种无齿轮电梯,该电梯用一台可控硅整流器控制,电梯用交流电机驱动,运行速度每分钟120米,潜在速度可达每分钟600米。与现有的电梯比较,能
Japan’s Toshiba Electric recently developed a gearless elevator. The elevator is controlled by a thyristor rectifier. The elevator is driven by an AC motor. The speed is 120 meters per minute. The potential speed is up to 600 meters per minute. Compared with existing elevators,