| 摘要 |
FIELD: high-speed contactless disc-rotor DC machines. SUBSTANCE: motor has disc rotor with toroidal permanent magnets closed by magnetic circuit. Motor frame accommodates stator mounted coaxially to rotor and built up of stator coils of trapezoidal shape with radially arranged active conductors. Rotor position detectors are located on magnetic circuit side. Trapezoidal shape of curve showing motor shaft torque as function of rotor of turn is provided due to appropriate selection of shape and geometric relation of dimensions of permanent magnets and stator coils. Trapezoidal magnets have concave section on one or both ends; center line of trapezium is perpendicular to disc radius and amounts to 0.7-0.9 of pole length. Width of active sections of conductors is 0.2-0.4 of pole pitch length and angle formed by radii running through center of active bundled conductors in each coil is 360/n, where n is number of magnets. Rotor is built up of three discs to reduce heat transfer from stator coils and stator is built up of two stator windings each placed between external and internal discs. Vent holes are provided in external discs of rotor, in top and bottom parts of motor frame, and on its side surface. EFFECT: improved motor efficiency, specific power, cooling conditions, reliability. 6 cl, 12 dwg |
