Abstract: A two-phase electro-mechanical stepper motor has a first and second rotor fixed on a shaft. Permanent magnets are mounted on each of the rotors. The magnets each have several north and south pole magnet regions that are oriented such that the magnet's north and south pole magnet regions are misaligned with respect to the other magnet's north and south pole magnet regions. A first and second stator are mounted around the shaft and positioned adjacent to the permanent magnets. The stators have coils that are wrapped around poles to allow the formation of electromagnets by passing electrical current through the wire coils. A gear train is positioned between the first and second rotors to obtain a higher torque output.

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.