| 摘要 |
PROBLEM TO BE SOLVED: To accurately determine the number of turns of an armature soil for a rotating electric machine by measuring the self inductance of the armature coil. SOLUTION: A number of turns is determined by subtracting the self inductance of a coil 1d in an air core state leakage magnetic flux, from the self inductance of the coil in a state in which an iron core 2 is inserted into an armature 1, for each parallel coil of each phase. Namely, it becomes possible to accurately determine the number of turns which cannot be detected by measurement of a resistance value, since the self inductance of the coil 1d is proportional to the square of the number of turns. Consequently, manufacture a high- quality and inexpensive rotating electric machine becomes possible.
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