BRAKE CONTROLLER AND AN ELEVATOR SYSTEM
First Claim
Patent Images
1. 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, andwherein said solid state solid-state switches are configured to adjust output terminal voltage by modulating the DC link voltage.
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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.
23 Citations
20 Claims
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1. A brake controller, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification