| 摘要 |
PURPOSE:To obtain large rotary torque and stable operation by providing two coils of phases, forming a resistance bridge of adjacent phase coils and resistance elements to detect a counterelectromotive forces, and controlling to flow currents to armature coils. CONSTITUTION:Two armature coils are provided for each phase, and these six coils 2U-2W' are disposed at an equal interval. On ends of two coils (e.g., 2U and 2U') for each phase are commonly connected, and the other ends of the coils are connected via connecting points 17-19 to the adjacent coils (e.g., 2U and 2W'). Two resistance elements R2a, R3a are inserted between the common connecting points for each phase, and a resistance bridge is formed of the coil (e.g., 2U and 2W') and resistance elements (e.g., R2a and R3a). Amplifiers 3-1-3-3 are connected between the connecting points 17-19 and 20-22 to detect a counterelectromotive forces of the phases, and armature coils 2U-2W' are controlled to be energized by the detected values. |
