The fast-switching speed, higher voltage and higher temperature capabilities of wide-bandgap (WBG) power devices such as SiC and GaN devices have brought in clear opportunities in achieving high-density, higher-efficiency, higher-frequency and highly-integrated motor drives. However, high dv/dt and high switching frequency can cause increased level of motor over-voltage, insulation and bearing degradation and electro-magnetic interference. Under the high dv/dt of WBG motor drives, motor terminals and stator neutral will see clear over-voltage with much shorter cables than that under Si IGBT motor drives and the voltage stress will mostly drop on the first several turns of the motor windings. How the switching speed and switching frequency will affect the winding insulation (e.g., through partial discharge) and motor bearing current will be explained. Experimental test results with SiC motor drives will be given and the theory behind the experimental observations will be provided with the analysis in both the time and frequency domain. Several potential solutions in addressing the above negative side-effects of high-frequency WBG drives will be given, including passive and active filters, waveform shaping through soft-switching and gate drive, alterative converter topologies, quasi-multilevel modulation, etc. SiC motor drive examples will be presented to further demonstrate the opportunities, challenges and potential solutions mentioned above.

Hardware-in-the-loop (HIL) simulation is revolutionizing power systems analysis by facilitating advanced testing and evaluation methodologies. HIL simulation offers a unique capability to assess intricate systems by integrating real equipment into simulation environments. This tutorial aims to delve into the realm of real-time simulations, focusing specifically on Control HIL (C-HIL) and Power HIL (P-HIL) methodologies. Beginning with a comprehensive overview, the tutorial will progress to explore two case studies centered on power system applications, giving special attention to networks with high penetration of renewable sources based on converter interfaced generators. Through practical demonstrations and in-depth analysis, participants will gain valuable insights into the benefits of real-time simulation techniques and their relevance in modern power systems. Next, the structure of the tutorial is summarized:

• Benefits, applications, and challenges of real-time HIL simulation
• Case study 1: From simulation to prototyping of a VSC through C-HIL
• Case study 2: Evaluation of the performance of a protection relay

The energy savings that can be achieved by driving electrical motors at the desired speed rather than maximum speed using variable frequency converter technologies is clear and accepted within industry. There can be however a general reluctance to retrofit VFD’s due to increased infrastructure and installation costs. The integration of power electronic converters into electrical motors to create variable speed integrated motor drives offer many benefits over traditional separated VSD’s in terms of installation costs, environmental requirements and raw material costs. There is also a cross sector move towards integration of motors and converters in order to reduce weight and raw material usage, for example in the automotive sector. This tutorial will introduce the concept of the integrated motor drive and summarize the challenges involved with their design and manufacture. Specific contributions will be provided by several world leading experts in areas of integrated drive topologies and distributed control, wide bandgap semiconductors and implications for their use in IMD’s, systems based thermal management solutions and emerging technologies. Integrated motor drives from an industrial point of view will be highlighted together with a discussion of the constraints and commercial factors that are involved in addition to real-world examples of industrial deployment.