The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2019
Filed:
Feb. 06, 2017
Henri Wenlin, Helsinki, FI;
Tuukka Korhonen, Tuusula, FI;
Lauri Stolt, Helsinki, FI;
Ari Pikivirta, Tervakoski, FI;
Arto Nakari, Hyvinkaa, FI;
Henri Wenlin, Helsinki, FI;
Tuukka Korhonen, Tuusula, FI;
Lauri Stolt, Helsinki, FI;
Ari Pikivirta, Tervakoski, FI;
Arto Nakari, Hyvinkaa, FI;
Kone Corporation, Helsinki, FI;
Abstract
An adjustable brake controller of an elevator brake including a DC bus, first terminals for connecting the brake controller to a first magnetizing coil, second terminals for connecting the brake controller to a second magnetizing coil, a first controllable power switch coupled between the first terminals and the DC bus, the first controllable power switch being configured to supply electric power from the DC bus to the first magnetic coil responsive to a first control signal, a second controllable power switch coupled between the second terminals and the DC bus, the second controllable power switch being configured to supply electric power from the DC bus to the second magnetizing coil responsive to a second control signal, and a controller configured to generate the first and the second control signals for controlling the first and second power switches, respectively, with a brake open mode and a brake holding mode.