Aeroflex Laboratories, Inc.

501 Aeroflex Laboratories, Incorporated

Myron Schwartz

A three phase, permanent magnet rotor, AC electric motor includes a twenty-four unskewed slot stator wound in a three phase arrangement and an eight pole permanent magnet rotor in which the rotor pole pieces are unskewed and angularly displaced from equally 45.degree. spaced reference positions about the rotor by different amounts which are integral multiples of 1.875.degree.. The cogging frequency is eight times higher and the cogging torque are eighth that of a corresponding motor with a conventional permanent magnet rotor.

Low cogging motor

A portable cryogenic helium-filled refrigeration system includes a cold finger evaporator, a compressor connected to the cold finger, a brushless DC motor connected to drive the compressor, and an electronic circuit for switching the stator-armature winding currents of the motor. The motor and compressor and the electronic circuit are all enclosed within a common housing which is charged with helium gas refrigerant under pressure.

Growing community of inventors

St. James, NY, United States of America

Myron Schwartz