| 摘要 |
A gearless, ropeless elevator according to the present invention includes a universal independent linear electromagnetic retarder as an essential component that will ensure safe and comfortable transit for passengers going up and down. By design sufficient number of independent retarders are securely fixed to the independent passenger cabin such that under free fall conditions due to power failure for example the gross weight of the gearless, ropeless elevator assembly will be counter balanced by the force generated in the retarders so permitting it to descend at a slow speed until resting on its buffers. The independent universal retarder unit which can also function as a motor includes not only a fail safe brake capable of slowing and stopping a gearless, ropeless elevator assembly but also a UPS unit capable of supplying the retarder with sufficient power for a few seconds to permit the independent cabin and passengers to slowdown comfortably from high speed. Both are fed from an onboard continuously charged battery unit which also provides supplies to the logic control circuits and switches.
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