FOR IMMEDIATE RELEASE No. 3251
Helps reduce elevator shutdowns during strong winds and earthquakes
TOKYO, February 7, 2019 - Mitsubishi Electric Corporation (TOKYO: 6503) announced today that it has developed a device that passively controls rope sway when high-rise building elevator sway due to strong winds or long-period earthquakes. By enabling elevators to continue operating under such conditions, the new device will help to stabilize elevator operations and contribute to greater user convenience.
Rope-sway control technology
Principle of rope-sway control
Mitsubishi Electric's new passive rope-sway control device applies a magnetic force, called negative stiffness, to the bottom-end of the rope. Negative stiffness is a well-known principle, and it applies a force in the opposite direction against a normal spring's restoring force.
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