- Tytuł:
-
Prady łożyskowe w układach napędowych z falownikami PWM
Bearing currents in PWM inverter-fed drives - Autorzy:
-
Kempski, A.
Smoleński, R. - Powiązania:
- https://bibliotekanauki.pl/articles/1374764.pdf
- Data publikacji:
- 2006
- Wydawca:
- Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
- Tematy:
-
prąd łożyskowy
układ napędowy
falownik PWM
silniki elektryczne - Opis:
- The application of high switching techniques improves the economic and technical parameters of induction motor drives. However, it has been discovered recently an adverse effect on a bearing assembly which is caused by destructive bearing currents EDM (Electrical Discharge Machining). Since the introduction of the IGBT technology there has been a documented increase in electrically induced bearing failures and shortening electrical life of bearings. In the paper it has been presented the statistical approach related to the distributions of EDM currents in drives with different filter configurations. Commonly used solutions for CM currents reducing are the line reactors and CM chokes. However, they increase risk of the appearance of EDM currents of higher amplitudes in shorter awaiting times. The CM transformer is a good choice for a simultaneous decreasing of the CM current and the risk of EDM currents. However, the best method of an elimination of bearing currents is a cancellation of its source - common mode voltage - at the output of the inverter. In a paper it has been presented so-called sinusoidal filter that assures nearly zero common voltage at the filter output, strongly damps common and differential EMI and eliminate bearing currents.
- Źródło:
-
Maszyny Elektryczne: zeszyty problemowe; 2006, 74; 75-80
0239-3646
2084-5618 - Pojawia się w:
- Maszyny Elektryczne: zeszyty problemowe
- Dostawca treści:
- Biblioteka Nauki
Artykuł