ELEVATOR REGENERATIVE DRIVE INCLUDING AN AIR CORE INDUCTOR

• US 20120000730A1
• Filed: 03/31/2009
• Published: 01/05/2012
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Original Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Inventors: Dehmlow, Marvin, Mann, Michael, Zemke, Wolfgang Lutz
• Granted Patent: US 8,827,042 B2
• Time in Patent Office: Days
• US Class Current: 187/289
• CPC Class Codes: B60L 7/10 Dynamic electric regenerative braking B60L7/22 takes precedence
• CPC Class Codes: B66B 1/302 for energy saving
• CPC Class Codes: B66B 1/32 effective on braking devices , e.g. acting on electrically controlled brakes brake control H02P, lift brakes per se B66B5/02
• CPC Class Codes: H02P 3/18 for stopping or slowing an ac motor
• CPC Class Codes: Y02B 50/00 Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility

Abstract

An exemplary elevator machine includes a motor that operates in a first mode to move an elevator car and in a second mode to generate power. A line reactor is associated with the motor for delivering power generated by the motor operating in the second mode. The line reactor comprises an air core inductor.

Claims

1. An elevator machine, comprising:

a motor that operates in a first mode to move an elevator car and in a second mode to generate power;

a line reactor associated with the motor for delivering power to the motor operating in the first mode and delivering power generated by the motor operating in the second mode, the line reactor comprising an air core inductor.

2. The elevator machine of claim 1, comprising

a shield near the line reactor to shield at least a selected component in a vicinity of the air core inductor from magnetic flux.

3. The elevator machine of claim 2, wherein the shield comprises a housing that at least partially surrounds the air core inductor.

4. The elevator machine of claim 2, wherein the shield comprises a magnetic material.

5. The elevator machine of claim 1, comprising

a cooling element associated with the line reactor for cooling the air core inductor.

6. The elevator machine of claim 1, wherein the line reactor comprises three air core inductors.