![]() 4.9, is the basic shape that is stamped from the SiFe sheets. The sheets are made from the same material as the rotor and likewise are coated with a thin electrical insulated paint that reduces eddy current losses significantly. 4.9, shows the stator that is assembled from 110 pieces of soft iron, SiFe, 0.5 mm thickness sheets that form a stator that is 55 mm long. ![]() With synchronous motors, a practical utilisation limit can appear that will be detected approximately by a stator-current limit controller.Ĭomponent 5, Fig. In the case of reactive power compensators the under-excitation limit can be attained only with a stator-current limiter. In coastal areas it is necessary to reduce the system voltage at certain times of the year because of salt vapour there is thus an increase in stator current for the same power. With gas turbo-sets, for example, the useful output can be raised at times to cover peak demands, so that the limit is governed partly by the stator current. To illustrate this point, actual applications of a stator-current limit controller, usually in conjunction with limit control of the load angle and excitation current, are given below. Thus, stator-current limitation is employed only in special cases. The stator-current limit, which is governed by thermal considerations, normally lies beyond the operating range of the synchronous generator. ![]()
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