Y. Yoshikawa

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[1] The accuracy of HF radar measurement in the Tsushima Strait is investigated. A comparison between radial velocities measured by HF radar and acoustic Doppler current profiler (ADCP), which provides an upper bound of HF radar measurement error, shows that the root-mean-square (RMS) velocity difference obtained from the principal component analysis is(More)
According to downsizing the motion applications, high torque and power density are the most serious requirements for electric machines. Double rotor and toroidally winding permanent magnet motor is proposed to solve the problem and it is suitable for direct drive system. But it has a large cogging torque that generates the large acoustic noise. In this(More)
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