Mainspring Energy, Inc.

Regal Beloit America, Inc.

Alan Crapo

Christopher David Gadda

Andrew H Hancock

John Lawler

Shannon Miller

Scott Coakley

John Powers

Kevin Walters

Matthew Svrcek

Samuel Sherman

David B DeGraaff

Paul Knauer

David Degraaff

A linear electromagnetic machine includes a stator, a translator, and a bearing system. The bearing system maintains alignment against lateral displacement of the translator relative to the stator, as the translator reciprocates axially. More particularly, the bearing system maintains a motor air gap between the stator and a magnetic section of the translator. The stator includes a plurality of stator teeth and windings, which form a plurality of phases. The stator teeth and windings are arranged using a hoop stack with spines to form a stator bore and define the motor air gap. The bearing system can include bearing housings that are configured to form a bearing interface with a surface of the translator. The bearing interface can include a contact bearing or a non-contact bearing, such as a gas bearing. Current is controlled in the phases to convert between electrical energy and kinetic energy of the translator.

Linear electromagnetic machine with a stator having stator teeth arranged to provide an anti-clocking force

Linear electromagnetic machine system

Linear electromagnetic machine system with bearing housings having pressurized gas

A rotor structure for a conical air gap electrodynamic machine has one or more rotor assemblies arranged on an axis of rotation. Each of the one or more rotor assemblies includes magnetically permeable structures positioned radially about the axis of rotation. The magnetically permeable structures include first surfaces confronting the conical air gap that are oriented at an angle to the axis of rotation and second adjacent surfaces that are at an angle to the axis of rotation. The second adjacent surfaces are disposed radially closer to the axis of rotation than the first surfaces. One or more groups of magnetic structures include magnetic material. The one or more groups of magnetic structures include a first group of magnetic structures interleaved with the magnetically permeable structures, a second group of magnetic structures, and a flux conductor shield disposed adjacent to the second group of magnetic structures.

Rigid rotor structures for conical air gap electrodynamic machines

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San Jose, CA, United States of America

Alan Crapo