NON-DEFECTIVE/DEFECTIVE DISCRIMINATION METHOD FOR WINDING OF HIGH-VOLTAGE DYNAMO-ELECTRIC MACHINE BASED ON DIELECTRIC BREAKDOWN VOLTAGE

摘要

PPROBLEM TO BE SOLVED: To obtain a method allowing a low-cost and accurate judgment equivalent to a judgment using an actual dielectric breakdown voltage. PSOLUTION: Three functions are defined from a plurality of parameters obtained from an insulating property test and from the specification of a dynamo-electric machine, and individual constants are set for the three functions. If at least one of the three functions is satisfied, the case is judged as defective. The three functions shall be such that a first function tanSB0/SBtanSB2/SBis greater than a reference value A, a second function I/PSBi1/SBis greater than a reference value B where PSBi1/SBis smaller than a reference value D, and a third function ätanSB0/SBtanSB2/SB+kSB1/SBI/PSBi1/SB+abs(kSB2/SBC/CSB0/SBI)}/PSBi1/SBis greater than a reference value F. PCOPYRIGHT: (C)2003,JPO