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The paper describes the mechanical and thermal design of a high speed, high power density synchronous permanent magnet machine for an aero engine starter generator system with a power rating of 150 kW and maximum speed of 32,000 rpm. As both mechanical and thermal aspects have a direct impact on machine overall performance and weight reduction, a critical design optimisation was carried out. Intensive...
The paper describes the mechanical and thermal design of a high speed, high power density synchronous permanent magnet machine for an aero engine starter generator system with a power rating of 150 kW and maximum speed of 32,000 rpm. The electrical machine is designed to minimise the weight and maximise the efficiency so both mechanical and thermal aspects are considered. The cooling strategy adopts...
A permanent magnet motor was designed for aircraft traction during the taxiing phase. In order to improve the reliability, the motor was attached to enable direct drive of the wheel without additional gearing. Due to the high torque needed for the aircraft traction, and the space and mass limitations of the wheel environment, the thermal management of the motor presents a big challenge. This paper...
The paper presents a direct-torque-control scheme for a direct drive variable-speed permanent magnet synchronous generator (PMSG) for wind energy without any position sensor. Direct control of the rotating velocity and amplitude of the stator flux vector allows very fast torque response of PMSG according to the generator speed. Fixed switching frequency and very low torque ripple are obtained with...
This work focuses on performance improvements of the stator flux estimation for a direct torque controlled interior permanent magnet (IPM) synchronous motor drive. In this paper, an adaptive sliding observer is presented to estimate the stator flux linkage based on the motor current model. The observer has better dynamic behavior, disturbance resistance and high accuracy estimation ability. The experimental...
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