Atsushi Kumamoto

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Observations of the subsurface geology of the Moon help advance our understanding of lunar origin and evolution. Radar sounding from the Kaguya spacecraft has revealed subsurface layers at an apparent depth of several hundred meters in nearside maria. Comparison with the surface geology in the Serenitatis basin implies that the prominent echoes are probably(More)
The authors discuss the semi-closed loop torque control of buried permanent magnet motor using a flux weakening approach. Following the modeling of the motor, the power capability of the machine is briefly summarized. In the flux weakening method, the controller generates current commands so that the operating point of a motor shifts from a normal mode to a(More)
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