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Abstract
In the paper, a concept of separation of an inverter-fed induction motor drive from its mains supply by two transistor switches inserted in the dc-link circuit is reexamined based on the proposed parallel quasi-resonant dc-link inverter (PQRDCLI). The objective of the paper is to show an advantage of the proposed topology in limiting high frequency common mode voltage and bearing currents. In the laboratory setup, an induction machine was equipped with hybrid ceramic bearings and an insulated clutch to measure the shaft-to-frame bearing voltage and the shaft-grounding current. Experimental tests of the PQRDCLI confirm significant reduction of common mode voltage and shaft-to-frame bearing voltage at dc-link zero voltage notches. By controlling the output voltage slopes, the shaft-grounding brush current and the ground leakage current are also reduced. The efficiency measurement and evaluation of the proposed topology, as compared with a two-level hard switched inverter, reveal comparable efficiency of around 95% and indicate loss distributions in both inverters
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
IEEE TRANSACTIONS ON POWER ELECTRONICS
no. 35,
pages 9553 - 9562,
ISSN: 0885-8993 - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Turzyński M., Chrzan P.: Reducing common mode voltage and bearing currents in quasi - resonant DC - link inverter// IEEE TRANSACTIONS ON POWER ELECTRONICS -Vol. 35,iss. 9 (2020), s.9553-9562
- DOI:
- Digital Object Identifier (open in new tab) 10.1109/tpel.2020.2969495
- Verified by:
- Gdańsk University of Technology
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