| 摘要 |
PCT No. PCT/DE89/00452 Sec. 371 Date Dec. 30, 1991 Sec. 102(e) Date Dec. 30, 1991 PCT Filed Jul. 6, 1989 PCT Pub. No. WO90/13935 PCT Pub. Date Nov. 15, 1990.In a large-diameter a.c. motor, the stator is divided by joints (6). The stator coil (5) consists of windings (4) which are arranged in two layers in the grooves of the stator. In order to simplify assembly of the machine, the stator coil (5) is divided into several zones (7) of closed windings (4) corresponding to the number of joints (6), which lie only in the grooves located between the joints. In the grooves adjacent to the joint (6), occupied with a winding side (8) in only one layer, the air gap is larger. Such a large-diameter a.c. motor, of synchronous or asynchronous design, can be advantageously used for variable-speed applications, for which the stator coil is supplied with current of varying frequency.
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