| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw type elevator control structure having an automatic detection function and capable of immediately detecting any abnormality when a slight abnormality occurs in a transmission member of an elevator, and enhancing the safety of the elevator. SOLUTION: In the ball screw type elevator control structure including a ball screw 1, an electric motor 2, a motion control unit 3, a current measurement unit 4, and a logical circuit unit 5, the ball screw is connected to an elevator box 9, the electric motor rotates the ball screw to elevate/lower the elevator box, and the motion control unit provides the power of the electric motor to control motion parameters of the electric motor. The current measurement unit measures the current to operate the electric motion by the motion control unit, and transfers the current value to the logical circuit unit. The logical circuit unit analyzes the current value measured by the current measurement unit, and compares it with the set value. When the measured current value is determined to be abnormal, the abnormal state is processed. COPYRIGHT: (C)2007,JPO&INPIT
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