Method of metering an air-gap in an electric rotating machine

摘要

A method of metering an air-gap in an electric rotating machine comprising a rotor core provided integrally on a rotary shaft and a stator core arranged coaxially with the rotor core around the outer periphery thereof is disclosed, which method comprises measuring the width of the stator core in the radial direction prior to assembling the stator core and the rotor core, also measuring the position of an outer periphery of the stator core from the axis of the rotor core after the assembling, calculating the position of an inner periphery of the stator core from the axis of the rotor core based on the difference between the result of measurement of the width of the stator core in the radial direction measured prior to the assembling and the result of measurement of the position of the outer periphery of the stator core from the axis of the rotor core after the assembling, and further calculating the difference between the position of the inner periphery of the stator core and the position of the outer periphery of the rotor core based on the results of the measurements, the thus-obtained difference being defined as an air-gap between the stator core and the rotor core.