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- W4210374642 abstract "Due to ongoing research work, a prototype test rig for testing high speed motors/generators has been developed. Its design is quite unique as the two high speed machines share a single shaft with no support bearings between them. A very high maximum operating speed, up to 80,000 rpm, was required. Because of the need to minimise vibration during operation at very high rotational speeds, rolling bearings were used. To eliminate the influence of higher harmonics of supply voltage and current on the formation of torque oscillations on the shaft and excessive losses in the form of heat, a voltage source inverter with high switching silicon carbide (SiC) power transistors characterizing high precision of the output voltage generation with a fundamental harmonic frequency of several kilohertz has been used. During the first start-ups, it turned out that the system was not stable, and a failure occurred. The paper presents the consequences that may arise when a machine operating at a speed of about 70,000 rpm fails. The article contains pictures of a generator failure that occurred at a high rotational speed." @default.
- W4210374642 created "2022-02-08" @default.
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- W4210374642 date "2022-03-31" @default.
- W4210374642 modified "2023-10-14" @default.
- W4210374642 title "Failure analysis of a high-speed induction machine driven by a SiC-inverter and operating on a common shaft with a high-speed generator" @default.
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- W4210374642 doi "https://doi.org/10.17531/ein.2022.1.20" @default.
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