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Position sensorless speed control of super high-speed permanent magnet (PM) motor for micro gas turbine generation system is described. Mechanically robust surface PM (SPM) generator is installed in a turbine system. This generator is used as the starting motor. The sensorless control of the synchronous generator/motor is done by using voltage/frequency (V/F) control strategy without current loop. After the simulation of the proposed strategy, no-load starting test of the generator and actual starting test of the gas-turbine system are done. The proposed sensorless-control system can start and control the PM motor from zero to 30 000 r/min. The results show that the proposed system is robust for accelerating the generator even in the existence of the disturbance caused by the ignition of the turbine.
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Morimoto et al. (2006) studied this question.
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