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Maglev Energy, Inc.

Martin Epstein

Jon Harms

Wei E Wu

Louis Chow

Yang Hu

Xinzhang Wu

Hanzhou Liu

Tom Dunn

William H Stinson

Richard McMasters

Claudio Esposito

The present invention is a high efficiency permanent magnet machine capable of maintaining high power density. The machine is operable over a wide range of power output. The improved efficiency is due in part to copper wires with a current density lower than traditional designs and larger permanent magnets coupled with a large air gap. In a certain embodiment wide stator teeth are used to provide additional improved efficiency through significantly reducing magnetic saturation resulting in lower current. The machine also has a much smaller torque angle than that in traditional design at rated load and thus has a higher overload handling capability and improved efficiency. In addition, when the machine is used as a motor, an adaptive phase lag compensation scheme helps the sensorless field oriented control (FOC) scheme to perform more accurately.

High efficiency permanent magnet machine

A wind turbine having blades that rotate in a horizontal plane about a vertical axis. A single output shaft is directly connected by one-way bearings to the driven shaft of a permanent magnet generator. This eliminates the need for a gearbox and also eliminates the need for inverters. Friction losses are further reduced by suspending the vertical shaft with magnetic bearings. Airfoils are positioned in a specific vertical design so that they cup the wind on a lower concave portion of the airfoil for self-starting capability. Stealth radar-absorbing mesh and faceted mounting structures reduce scrambling of radar returns.

Vertical axis wind turbine with cambered airfoil blades

A Halbach array is radially disposed in an environment optimized for efficiency and controlled for efficient generation and use of power in order to generate, establish, and maintain a desired level of rotational energy with enhanced efficiency and in order to make the most efficient use of electromotive forces and magnetic fields which are either intentionally created for the operation of the apparatus or which result from the operation of the apparatus.

Apparatus for generating an electric current in a varying magnetic field

Electro-motive machine using halbach array electrons trapped in electromagnetic coils and using hybrid coils to harvest back electromotive force

A Halbach array is radially disposed in an environment optimized for efficiency and controlled for efficient generation and use of power in order to generate, establish, and maintain a desired level of rotational energy with enhanced efficiency.

Electro-motive machine using Halbach array and electrons trapped in electromagnetic providing current

Electro-motive machine using Halbach array

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Seminole, FL, United States of America

Martin Epstein