Abstract
High Frequency AC (HFAC) power distribution system concerns the delivery of power at multi-kHz frequency via electric cables. Early work on HFAC has demonstrated the many potential benefits of HFAC systems in terms of flexibility to meet loads at different voltage levels, ease of electrical isolation using compact high frequency transformers, and the prospect of significant savings in component count and system integration. High frequency operation can also improve the dynamic response of the system, and reduces or eliminates acoustic noise. However, despite the many perceived benefits, the uptake of HFAC has been very slow. To date, HFAC power distribution has been confined to some pockets of applications in communications, computer and information technology systems. The ever increasing demand for more power at higher efficiency by our environmentally conscious economies means that electrical power will be delivered, where viable, at higher voltage, higher current and higher frequency. In view of advances in resonant power converter technologies, advanced soft switching (zero-voltage, zero-current) schemes, compounded by recent developments in high frequency cable and magnetic materials technologies, this chapter aims to give a timely appraisal of this very promising means of power distribution. It gives a detailed account of HFAC work in a diverse range of applications, from space to automotive, and from computer systems to microgrids. It also discusses the future prospects of this new power distribution system, and explores the new concept of embedding power and data within new cable architectures. It will also highlight key challenges such as EMI, and key drivers for HFAC to become a viable power distribution means in the future.KeywordsInduction MotorPower DistributionTorque RippleDirect Torque ControlInrush CurrentThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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