| 摘要 |
PROBLEM TO BE SOLVED: To provide a power-generator stator that achieves reduction in field current and reduction in loss. SOLUTION: The power-generator stator is configured such that a rotor 1 is placed at the center. The stator has a core 2. The core is provided with a plurality of coil slots 5 respectively extending along the axial center of a rotary shaft of the rotor so as to store each stator coil. The stator coil is composed of solid and hollow strand conductors that are directly or indirectly cooled by a refrigerant. The stator coil includes a half-turn coil comprising an upper coil 4a and a lower coil 4b mutually connected with each other at each end part protruding from both side faces of the stator core. The strand conductor is formed so as to be dislocated by being continuously twisted toward the extending direction of the coil slot at a part where the strand conductor is stored inside the coil slot. A proportionality coefficientαobtained by dividing the number of solid strands 4c constituting the half-turn coil by the number of hollow strands 4d is≥2 while current densityβof the stator coil is within a range of 8A/mm<SP>2</SP>≤β≤11A/mm<SP>2</SP>. COPYRIGHT: (C)2009,JPO&INPIT
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