Journal article
Model-Based Circuit Protection Using Solid State Switches



Publication Details
Authors:
Brabetz, L.; Ayeb, M.; Gysen, L.
Publication year:
2017
Journal:
SAE International Journal of Engines
Pages range:
1375-1382
Journal acronym:
SAE Int. J. Engines
Volume number:
10
Issue number:
3
ISSN:
1946-3944
Languages:
English

Abstract

Currently, circuit breakers and, in most cases,
thermal fuses are used for wire protection due to their low cost and
robust design. As an alternative, solid state switches are being
considered within future electrical distribution systems (EDS) for
several reasons, e.g. resetability, diagnosis, smaller tolerances, and
reduced dependencies on ambient temperature or arcing. Particularely if
combined with benefits on the system level, such an application can be
advantageous.

The new approach presented in this paper uses a
thermal model of the wire instead of only an emulation of the thermal
fuse behavior. This allows, based on the electrical current profile, the
calculation of the wire temperature and thus a robust and precise
protection of the wire. In addition, it minimizes the probability of
faulty switching, which is of particular importance with regard to
safety-critical electrical functions. Hence, results include higher
reliability and a reduction of the wire cross-section area and copper
usage. The paper describes the theory, the method and its requirements,
and the basic algorithm, as well as initial simulation and measurement
results.


Last updated on 2019-25-07 at 16:08