Invention Grant
- Patent Title: Electromagnetic brake system for an elevator with variable rate of engagement
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Application No.: US15529435Application Date: 2015-11-19
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Publication No.: US10745239B2Publication Date: 2020-08-18
- Inventor: Steven M. Millet , Ismail Agirman , Amir Lotfi
- Applicant: Otis Elevator Company
- Applicant Address: US CT Farmington
- Assignee: OTIS ELEVATOR COMPANY
- Current Assignee: OTIS ELEVATOR COMPANY
- Current Assignee Address: US CT Farmington
- Agency: Cantor Colburn LLP
- International Application: PCT/US2015/061563 WO 20151119
- International Announcement: WO2016/085757 WO 20160602
- Main IPC: B66B1/44
- IPC: B66B1/44 ; B66B1/32 ; B66B5/02 ; B66B11/04

Abstract:
A braking system for an elevator includes an electromagnetic brake operably connected to an elevator car. A control circuit is operably connected to the electromagnetic brake and includes a switching mechanism to selectively modify a rate of engagement of the electromagnetic brake to selectively modify deceleration of the elevator car. A method of engaging an electromagnetic brake for an elevator system includes detecting one or more operational characteristics of the elevator system and selecting a first position or a second position of a switching mechanism disposed at a brake control circuit depending on the sensed operational characteristics. Electrical current is directed through one or more components of the brake control circuit, depending on the position of the switching mechanism, to determine a rate of engagement of the electromagnetic brake. A flow of electrical current through the brake control circuit is stopped, thereby causing engagement of the electromagnetic brake.
Public/Granted literature
- US20170362051A1 ELECTROMAGNETIC BRAKE SYSTEM Public/Granted day:2017-12-21
Information query
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