| 摘要 |
PURPOSE: To improve the efficiency of a motor, by disposing a permanently magnetized array between two continuous plates made of a soft-magnetic material in parallel with the magnetization direction of each constituent permanent magnet. CONSTITUTION: A stationary structure 2 has a cylindrical excitation piece 3 fixed, including a casing centering around the rotor axis X. This piece 3 is formed out of a plurality of triple alternating coils 3A, 3B, 3C, arranged so as to form a series of annular coils A-C, thereby creating the electric phase of a motor. These three phases A-C are fed with power by an excitation device 4 on the basis of instructions from a switch 5 with no interruptions. Magnetization rings 9, 11, 12 are supported by a non-magnetic flywheel 13 above and below an air gap. Further, annular plates 14, 15 are arranged in the axial direction on the respective sides of the magnetization rings 9. A larger area having a fixed magnetic field in each sector is obtained, so that a fixed motor torque can be developed over a large rotational angle. |
