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US 2016/0101963 A1Published application
Brake controller and an elevator system
AssigneeKone Corporation
InventorArto NAKARI
Life of this patent
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Abstract
A brake controller and an elevator system including the brake controller are disclosed. The brake controller includes a DC link for supplying power, the DC link including a positive DC link rail and a negative DC link rail; output terminals for connecting to a magnetizing coil of an electromagnetic brake; a current path established between the DC link and the output terminals for conducting DC link power to the magnetizing coil; and two solid-state switches fitted into the current path. Both solid-state switches are configured to adjust output terminal voltage by modulating the DC link voltage.
Claims20
A brake controller, comprising:
- a DC link for supplying power, said DC link including a positive DC link rail and a negative DC link rail;
- output terminals for coupling a magnetizing coil of an electromagnetic brake to the brake controller;
- and
- a current path established between said DC link and said output terminals for conducting DC link power to said magnetizing coil;
- herein the brake controller comprises two solid-state switches fitted into the current path, and
- wherein said solid state solid-state switches are configured to adjust output terminal voltage by modulating the DC link voltage.
3 more elements
Dependencies are inferred from the claim text.