METHODS FOR TESTING AND MANUFACTURING ROTARY ELECTRIC MACHINE

• Main Authors: INNAN TOSHIO, HIRANO TAKAO, HIROSHIMA SATOSHI, ARAKI TAKASHI, YAMADA MOTOHIKO
• Format: Patent
• Language: English
• Published: 20.01.2011
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a testing method for accurately detecting the contact state between unit coils composing stator coils in each phase.SOLUTION: The method for manufacturing a permanent magnet electric motor includes: a coil mounting step (step 1) of inserting a U-phase coil, a V-phase coil and a W-phase coil into a stator core; a neutral point connecting step (step 2) for forming a neutral point by swage connecting the stator coils of each phase; and a step of performing an in-phase coil impulse discharge test (step 3) for detecting the insulation state between the unit coils of each stator coil. In this impulse discharge test, the insulation abnormality between the unit coils is detected by applying an impulse voltage to stator coils of each phase and by detecting the presence or absence of the occurrence of the partial discharge between the unit coils. Thereafter, a step of forming an electric source terminal (step 4) and a step of conducting an electric test (step 5) for examining the insulation to the earth are performed.