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High Power Density Induction Motors and Drives for Aircraft Propulsion

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: 80NSSC21C0540
Agency Tracking Number: 206812
Amount: $749,999.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: A1
Solicitation Number: SBIR_20_P2
Solicitation Year: 2020
Award Year: 2021
Award Start Date (Proposal Award Date): 2021-07-30
Award End Date (Contract End Date): 2023-07-29
Small Business Information
539 Industrial Mile Road
Columbus, OH 43228-2412
United States
DUNS: 014152511
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Michael Tomsic
 (614) 481-8050
Business Contact
 Michael Tomsic
Phone: (614) 481-8050
Research Institution

We are pursuing the development of a new induction motor through innovative design with embedded drives enabling advanced electric drive technology to meet aircraft propulsion needs. The Phase II will continue to focus on the design improvements started in the Phase I: (1) power loss and cooling and (2) electric drive integration, and will also include the building and testing of a prototype motor and drive system. In this work, we have avoided the use of a permanent magnet (PM) based motor arrangement, which of course, would contain NdFeB magnets. Our concept incorporates an asynchronous (induction) style motor with embedded inverters and a two-phase semi-evaporative cooling system. Our total system (motor and drive) ultimately targets a continuous power density of 10 kW/kg and 12.6 kW/L or greater.nbsp;The motor and inverter design is based on two novel technologies and related controls for electric motors that have yielded record torque density and power density. The first novel technology is Variable Cross-Section Wet Coils (VCSWC) that configures the conductor windings with integrated cooling. The second technology is the integrated electronic drives, which are cooled as part of the same circuit that cools the stator, and which makes the full system very compact.nbsp;Based on the results of the Phase I the proposed electric motor to be built in the Phase II should be a 2 MW, 5000 RPM machine that represents a number of advances over the extant OSU record-breaking induction motor, and will be a world record winning motor with double the torque and an increased power density (25% improvement to12.5 kW/kg, continuous) with, at the same time, an increased efficiency (98.5%, cruise).nbsp;The Phase I/Phase II electric motor has an increased number of conductors per slot, and this is a key to loss reduction and increased efficiency. The Phase II will be focused on a design optimization within these basic parameters, and then a build and test program.

* Information listed above is at the time of submission. *

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