Inductively coupled power, useful for wireless elevator hall fixtures

• US 20060207837A1
• Filed: 06/10/2003
• Published: 09/21/2006
• Est. Priority Date: 06/10/2003
• Status: Active Grant

• Current Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Original Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Inventors: Haas, Deborah C., Vecchiotli, Alberto, Netter, Christian M., Zacchio, Joseph, Veronesi, William A., Stucky, Paul A., Zepke, Bruce E., Bellamy, Dennis W., Bacellar, Adriana H., Bacellar, Luiz F.
• Granted Patent: US 7,479,861 B2
• Time in Patent Office: Days
• US Class Current: 187/392
• CPC Class Codes: B66B 1/34 Details , e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
• CPC Class Codes: B66B 1/462 Mechanical or piezoelectric input devices
• CPC Class Codes: B66B 19/007 method for modernisation of elevators
• CPC Class Codes: B66B 3/00 Applications of devices for indicating or signalling operating conditions of elevators
• CPC Class Codes: Y02B 50/00 Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies

Abstract

Fixtures (27) at a doorway of a landing are formed integrally with a frame (17). Power is provided by an inductive coupler (32) having a core (70) and primary (75). The core is thin ferrite and extend significantly beyond the coils in the plane the coils are wound, to provide en extremely low resistance path for the efficient transfer of AC power.

Claims

1. An inductive power coupler, comprising:

a primary;

a secondary separated from said primary by an air-gap;

said primary and secondary each having a thin ferrite core with a coil wrapped around the core;

each of said cores having a width extending outwardly from the corresponding coil, said width and a length of said cores being between two and ten times as large as said air-gap, and a thickness of 5% -25% of said width.

2. A magnetic power coupler according to claim 1 wherein said primary and secondary are separated by a gap of on the order of 25-35 millimeters (1-1.4 inch).

3. A magnetic power coupler according to claim 1 wherein:

said thickness is between 3 millimeters (0.12 inch) and 30 millimeters (1.2 inch);

said length is on the order of 60 millimeters (2.4 inch) to 300 millimeters (12 inches); and

said width is on the order of between 60 millimeters (2.4 inch) and 300 millimeters (12 inches).