DocumentCode
273569
Title
MOSFETs and FREDFETS in motor drive equipment
Author
Goddard, T. ; Humphreys, J. ; van de Wouw, T.
Author_Institution
Philips Components, Hazel Grove, UK
fYear
1988
fDate
13-15 Jul 1988
Firstpage
47
Lastpage
50
Abstract
The authors discuss the properties of the FREDFET, a technology which yields a MOSFET with a very fast built-in reverse diode with properties similar to a discrete fast epitaxial rectifier. It is shown that its characteristics make the device an excellent choice for high frequency bridge leg systems such as 20 kHz AC motor control systems. Investigations have been carried out in dedicated test circuits as well as in a 20 kHz ACMC system which show that the FREDFET exhibits very low diode losses. It compares favorably with a discrete solution, using two extra diodes to overcome the slow speed of the standard built-in diode, and also with devices from the standard ranges
Keywords
AC motors; electric drives; insulated gate field effect transistors; power transistors; semiconductor diodes; 20 kHz; AC motor control systems; FREDFET; MOSFET; built-in reverse diode; dedicated test circuits; discrete fast epitaxial rectifier; high frequency bridge leg systems; motor drive equipment;
fLanguage
English
Publisher
iet
Conference_Titel
Power Electronics and Variable-Speed Drives, Third International Conference on
Conference_Location
London
Print_ISBN
0-85296-364-5
Type
conf
Filename
23310
Link To Document