Power electronic devices

摘要

The present invention relates to a power electronic device (1). The device includes a device unit (2) that is located axially between first and second pole pieces (4, 6). A contact pressure adjusting means (8) is located axially between the first and second pole pieces (4, 6). In one arrangement the contact pressure adjusting means (8) includes a support member (10), a pair of disc type springs (16) positioned on the support member (10), and an insulating member (18) positioned around the device unit (2) between the compressible member (16) and the first pole piece (4). An overall contact compression force is applied to the power electronic device (1) by an external contact pressure means forming part of a stack assembly. The compressible member (16) can be compressed until an inner contact member (12) of the support member (10) is in contact with a first surface (2b) of the device unit (2). The contact pressure adjusting means (8) of the power electronic device (1) then applies a device-specific contact compression force to the device unit (2) that is lower than the overall contact compression force applied by the external contact pressure means.