Otis Elevator Company

United Technologies Corporation

Otis Elecator Company

Luis Arnedo

Shashank Krishnamurthy

Yang Wang

Marinko Kovacic

Daryl J Marvin

Vladimir Blasko

An elevator power distribution system includes an elevator car () configured to travel in a lane () of an elevator shaft () and a linear propulsion system configured to impart force to the elevator car. The linear propulsion system includes a first portion (), mounted in the lane and a second portion () mounted to the elevator car configured to coact with the first portion () to impart movement to the elevator car. A plurality of electrical buses () are disposed within the lane and configured to provide power to the first portion, a rectifier () is electrically connected to each of the plurality of buses and configured to convert power provided between the respective bus and a grid (), and a battery backup () is electrically connected with the rectifier and configured to transfer power to or receive power from the rectifier.

Power distribution for multicar, ropeless elevator system

A method of configuring a power conversion cell for a distributed power system according to an example of the present disclosure includes: importing one or more software modules onto a controller of a conversion device configured to control power conversion with one or more of the modules selected based on one or more of a load or source device, and the results of a software simulation.

Universal power electronic cell for distributed generation

A neutral point clamped, multilevel level converter includes a DC voltage link; a first capacitor coupling one side of the DC link to a neutral point; a second capacitor coupling another side of the DC link to the neutral point; a plurality of phase legs, each phase leg including switches, each phase leg coupled to an AC node; a current sensor associated with each AC node; and a controller generating a PWM signal to control the switches, the controller generating a current zero sequence component in response to current sensed at each of the current sensors, the controller adjusting a modulation index signal in response to the current zero sequence component to produce the PWM signal.

PWM controlled neutral point clamped multilevel converter

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Cary, NC, United States of America

Luis Arnedo