  These proceedings collate lectures given at the twenty-eighth specialized
course organised by the CERN Accelerator School (CAS). The course was held at
the Hotel du Parc, Baden, Switzerland from 7 - 14 May 2014, in collaboration
with the Paul Scherrer Institute. Following introductory lectures on
accelerators and the requirements on power converters, the course covered
components and topologies of the different types of power converters needed for
particle accelerators. Issues of design, control and exploitation in a
sometimes-hostile environment were addressed. Site visits to ABB and PSI
provided an insight into state-of-the-art power converter production and
operation, while topical seminars completed the programme.
