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4 Maszyny Elektryczne : zeszyty problemowe

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O awaryjności silników klatkowych wysokiego napięcia

Bernatt M.

Maszyny Elektryczne : zeszyty problemowe

2004

Nr 68

37-40

Break-down rate of high voltage AC squirrel cage motors is not very high. But any failure of large AC motor involves for its user costs and losses uncomparable higher than the simple cost of repair or even replacing of the motor. In the paper the main reasons of large AC motors failures are discussed, most of them occur, or at least just begin, at starting period of the motor (when DOL starting method applied). Possible ways of minimizing break-downs number are presented, importance of proper diagnostic tests underlined. Two break-down examples: 1000 kW, 1500 RPM and 515 kW, 3000 RPM, 6000 V motor are discussed. After failure both motors were redesigned and renewed at their repair process. After redesigning the motors work satisfactory.

Analiza stanów awaryjnych silnika reluktancyjnego przełączalnego pracującego w zakresie stałego momentu

Bogusz P., Korkosz M., Prokop J.

Maszyny Elektryczne : zeszyty problemowe

2004

Nr 69

13-18

The paper shows of the run of switched reluctance motor (SRM) in electrical faults conductions. There is discussed classification of causes of faults conductions. There are presented selected cases of faults conductions. An analysis of switched reluctance motor operation in constant torque region performance is done on the basis of results from computer simulation. There are discussed analysis a contents of harmonics selected waveforms. Results of laboratory tests are enclosed. Conclusion is presented.

Awaryjność silników - wpływ izolacji zwojowej

Borecki H.

Maszyny Elektryczne : zeszyty problemowe

2002

Nr 64

91-97

Basing on dozens of technical expertises done during the last 3 years by the author of this paper the process of wearing out of the motor's insulation system were described. Special attention was paid to damages of turn-to-turn insulation system. The possible methods of diagnostics and checking condition of the insulation system were presented. The DC current based method was shown - this method enables to verify how much is the system worn out and enables to predict the lifetime of the machine. Rewinding machine at proper time (not to soon and not to late) allows to avoid not necessary costs of to soon repair and keeps the machine working, safe to the maintaining staff.

Awaryjność silników i układów napędowych

Chmelik K.

Maszyny Elektryczne : zeszyty problemowe

2000

Nr 61

7-10

W referacie będą opisane awarie silników elektrycznych z nadzorowanej ilości ponad 20 tys. maszyn i awarie tyrystorów.