Abstract: A two-phase electro-mechanical stepper motor having 1) a high ratio of torque per mass and torque per power draw, to be able to develop required rotating torque, 2) a magnetic circuit that allows developing of a significant holding torque while using a limited amount of electric power, and 3) two disk rotors positioned on either side of the stator with aligned poles. The actuator has a shaft extending into the actuator, and a first and second rotor, each fixedly mounted on the shaft, and each having a permanent magnet mounted thereon in opposing fashion. Additionally, there is a stator, loosely mounted around the shaft and positioned between the opposing permanent magnets, and having at least a first and second pole extending toward the first and second rotors respectively.
Type:
Grant
Filed:
September 2, 1998
Date of Patent:
November 9, 1999
Assignee:
CTS Corporation
Inventors:
Eleazor Felipe Bustamante, Phillip G. Adams, Catherine Hoskin, David Yan Leng, Grigori Roubinchtein