Optimisation of overvoltage limiters for IGBT inverters

• Type: Article in International Conference Proceedings Book
• Date: 1995

Authors

Carvalho, A (Author) FEUP; Martins, P (Author) Other; Araujo, A (Author) FEUP

Conference proceedings International

Title: PROCEEDINGS OF THE 1995 IEEE IECON - 21ST INTERNATIONAL CONFERENCE ON INDUSTRIAL ELECTRONICS, CONTROL, AND INSTRUMENTATION, VOLS 1 AND 2

Pages: 235-239

1995 IEEE 21st International Conference on Industrial Electronics, Control, and Instrumentation

ORLANDO, FL, NOV 06-10, 1995

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 1 Citation

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-001-HZE

Abstract (EN): The short circuit clearance in IGBT based power converters must be done with gate control such that the maximum current and voltage ratings are not exceeded. Conventional drives, using conventional off commutation circuit, usually react fastly to the fault with current commutation time optimised for the normal working conditions of the converter. For inverters in the power range of several tens of kVA the physical arrangement of the semiconductors does not allow to continuously reduce the leakage inductance. So this fast commutation time diverts almost all the short circuit current to limiter capacitor causing its overdimensioning, derating the commutation frequency. If the short circuit current is shared between the limiter and the power semiconductor the overvoltage may be reduced enabling the use of a smaller capacitor that benefits the duties and working frequency. This paper presents the design and operation characteristics of a drive circuit ruling these characteristics.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5