home search feedback

‘Professional electronic systems and product design’


The  IGBT gate driver was required to control the speed of a high power motor driving a high pressure gas compressor. At the surface this would be a straightforward problem, but this equipment operates down hole in a high pressure, high temperature environment.

The circuit provides four fully-isolated IGBT drives arranged in an H-bridge and powered from 1.1kV. The control circuit is configured to guarantee that the outputs do not overlap.

The choice of suitable components to operate from a 115°C cold(!) wall is a significant challenge and severely constrains the design. Although devices that meet maximum junction temperature limits can be found, all too often they are not available in appropriate packages.



Send mail to webmaster@dflsystems.co.uk with questions or comments about this web site.
Last modified: 03/04/08