MS student Yuyao Wang with advisor K. Haran Driving and controlling a permanent magnet synchronous machine requires precise knowledge of the rotor’s angular position, such that the voltages and currents can be applied with the right phase difference to extract maximum torque and efficiency from the machine. Conventional sensored methods required attachment of a position […]
High-Efficiency, High-Speed Motor for Compressor Applications
MS student Samith Sirimanna with advisor K. Haran Typically, HVAC systems consume 36% of the total energy requirement for commercial buildings in the USA. Since the major power consumption in an HVAC system lies in the compressor motor, the requirement for having a high-efficiency motor is significant. This project, funded by Johnson Controls International PLC, […]
Mechanical Design of High-Frequency, High Power Density Electric Machines
CEME Collaborator Bulent Sarlioglu with Research Assistant William Sixel, University of Wisconsin-Madison Increasing the power density of electric machines operating in high ambient temperatures is a challenge, as all the materials involved must be rated for operation at those temperatures. To improve cooling in electric machines exposed to temperatures greater than 400°C, a direct winding […]
Trunnion Effect on a PMSM with External Rotor Designs
MS student Yangxue (Sherry) Yu with advisor K. Haran It is important to understand rotor dynamics and correctly capture the rotor’s critical frequencies to predict and improve a motor’s performance. For an external rotor design, the presence of the trunnion effect, modeled as a rotational stiffness at the hub of the trunnion plate, may shift […]
Brushless Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems
MS student Shivang with Advisor A. Banerjee Turboelectric propulsion uses no batteries for propulsive energy during any phase of flight (unlike hybrid and all-electric systems) and is considered a critical enabler for low-carbon emissions in the aircraft industry. As batteries with high enough power capacity and the specific power required for commercial aircraft are unlikely […]
Insulation Design and Qualification for Form-Wound Air-Core Armature Windings in High-Frequency Machines
PhD student Thanatheepan Balachandran, Post-doc Yalin Wang, and MS student Yovahn Hoole with advisor K. Haran A NASA-funded inside-out permanent magnet synchronous motor (PMSM) is developed to demonstrate electric propulsion for commercial electric aircraft. Air-core machine windings are manufactured at UIUC. Insulation qualifications of these windings are evaluated for ground, high-altitude, and life-time tests. The […]