2023年7月26日 · Mike Davis from Electrical Machine Knowledge Exchange, discusses the function of stator wedging, the historical development of magnetic wedge material, their advantages and key maintenance considerations. In large electrical machines, the stator slots are opened to the width of the slot to allow the fitting of coils.

2008年8月8日 · The results showed that loose stator slot wedges of large generators could be detected either by their vibration frequency or by their displacement amplitude. This verified the correctness of the slot wedge loosening process and the validity of the detection system.

SPInduwedge Slot Wedges are made of either magnetic or nonmagnetic Material, being used as Slot Closures to hold the stator windings in the slots formed between the stator teeth. Slot wedges made of magnetic material are a significant means to improve the efficiency of a …

2022年8月5日 · In this paper, a method for extracting the Linear Prediction Cepstrum Coefficient (LPCC) and Mel Frequency Cepstrum Coefficient (MFCC) of percussion sound signal is proposed, and the tightness recognition of the stator slot wedge is realized by combining the BP neural network algorithm.

2022年9月1日 · We have developed a new type of magnetic wedge that does not contain resin, using a new technology that adheres magnetic particles to each other without using resin. This new technology has made it possible to increase the density of magnetic particles and achieve a high magnetic permeability that is approximately twice that of conventional ...

Shall the stator winding be tight in the slots ? Effects of radial and tangential forces. Can easily loosen bars/coils in the slot, if not wedged properly. Different thermal coefficient of expansion …

2017年7月5日 · FEM-analysis is used in order to investigate some effects of stator slot magnetic wedges on an induction motor performances. The test results and FEM-simulations are very close and prove that the utilization of magnetic wedges is a good solution to improve the performances of the induction motor with open stator slots.

Magnetic slot wedges are often used to improve starting performance of large induction motors. In this paper we have investigated – through simulation – the effects of the wedges on the performance characteristics of the motor and core losses under no load condition.

This method can realize the detection of stator slot wedge looseness of large vertical hydro-generator set without hanging rotor, improve the technical level of generator operation and maintenance of equipment operation and maintenance units, and provide support for the improvement of generator operation reliability.

2003年10月1日 · Stator slot wedges atop the winding slots in large electric motors restrain winding coil displacements from vibration and thermal expansion to prevent insulation chaffing wear and dielectric breakdown failures. They are usually inserted axially into broached keyway-like slots in the stator punching teeth.