Better curing control of enamelled winding wire by means ofthermo-analytical test procedures

摘要

A two-part project is described. The first part involves wiresample preparation using appropriate enamelling processes along withstandard test procedures. The second part involves the evaluation ofglass transition temperatures for all wire samples as received under thefirst part. Three different wire enamel types are applied by means ofthree different enamelling plants. For each of nine combinations of wireenamel and plant type, enamelled wire is produced in the possible rangeof enamelling speed in adequate steps. Standard test procedures areapplied to these wire samples to establish the range of speed that makesit possible to produce acceptable wire. For each wire sample the glasstransition is evaluated by means of standard techniques such asmeasurement of the dielectric dissipation factor (tan δ) versustemperature, differential scanning calorimetry (DSC), andthermomechanical analysis (TMA)