| 摘要 |
PCT No. PCT/DE91/00003 Sec. 371 Date May 12, 1992 Sec. 102(e) Date May 12, 1992 PCT Filed Jan. 8, 1991 PCT Pub. No. WO91/11845 PCT Pub. Date Aug. 8, 1991.The electric machine, advantageously a generator, includes a machine housing with two end shields, a lamination bundle provided with a stator winding having winding heads and a rotor in the housing. To improve the cooling effect and reduce aerodynamic flow noise the machine housing is provided with at least one air guiding duct enclosing circularly at least one winding head on one side of the lamination bundle and the at least one air guiding duct is provided with at least one inlet opening and at least one outlet opening for cooling air to carry away heat dissipated during operation, and each of the at least one air guiding ducts is bounded exteriorly by one of the end shields of the machine housing and interiorly by one of the two annular walls inserted between the lamination bundle and the end shield bounding the at least one air guiding duct exteriorly.
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