Patent ID: 8482243

Claim:
A high acceleration rotary actuator motor assembly comprising: a first phase motor element provided on a shaft, the first phase element including a first rotor carrying four magnets which alternate exposed poles, the first rotor being connected to the shaft and surrounded by a first stator formed of a plurality of interconnected segmented stator elements having a contiguous winding to form four magnetic poles, the first stator being in electrical communication with a first phase electric drive unit, wherein each of the poles exert a magnetic force upon the four magnets carried by the first rotor when the poles are electrically charged by the first phase electric drive unit; a second phase motor element provided on the shaft a first distance from the first phase motor element, the second phase motor element including a second rotor carrying four magnets which alternate exposed poles, the second rotor being connected to the shaft and surrounded by a second stator formed of a plurality of interconnected segmented stator elements having a contiguous winding to form four magnetic poles, the second stator being in electrical communication with a second phase electric drive unit, wherein each of the poles exert a magnetic force upon the four magnets carried by the second rotor when the poles are electrically charged by the second phase electric drive unit; a third phase motor element provided on the shaft a second distance from the second phase motor element, the third phase motor element including a third rotor carrying four magnets which alternate exposed poles, the third rotor being connected to the shaft and surrounded by a third stator formed of a plurality of interconnected segmented stator elements having a contiguous winding to form four magnetic poles, the third stator being in electrical communication with a third phase electric drive unit, wherein each of the poles exert a magnetic force upon the four magnets carried by the third rotor when the poles are electrically charged by the third phase electric drive unit; the second rotor and magnets being offset about the shaft from the first rotor and magnets by thirty degrees of rotation; the third rotor and magnets being offset about the shaft from the first rotor and magnets by sixty degrees of rotation; and the first, second and third phase elements being electrically isolated from one another.