Abstract:
The present invention relates to a method of estimating inductances and flux linkages of an electrical machine, which electrical machine is supplied with drive currents via current regulators and actual values of the drive currents are measured and fed back to the current regulators such that closed-loop control is provided. The method comprises the steps of providing one of the current regulators with an alternating current (AC) value either for a direct axis current reference i* d or for a quadrature axis current reference i* q of the machine current vector, while providing another one of the current regulators with a predetermined direct current (DC) value for the remaining one of the two current references i* d and i* q . Subsequently, after a predetermined time period has expired, a varying signal is superimposed onto an output signal generated by the current regulator in response to the AC value. Finally, a contribution signal, which corresponds to the contribution of the superimposed varying signal to the drive currents, is determined, and the machine inductances and flux linkages are estimated on the basis of the contribution signal.
Abstract:
The purpose of the invention is a stator winding for an electric rotating machine, in particular an high voltage electric rotating machine comprising insulated straight conductors and two end caps, which end caps each comprise a connector for every straight conductor, wherein the straight conductors are connectable to the end caps via the connectors of the respective end cap, and wherein the connectors of each end cap are connected to each other via embedded connections so that when connecting the straight connectors and both end caps, particular straight connectors are connected in serial, resulting in a desired stator winding pattern.