Permanent magnet electric motor

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9496774
APP PUB NO 20140285051A1
SERIAL NO

14296238

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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According to one embodiment, a rotor is configured by a rotor core and magnetic poles. Two or more types of permanent magnets are used such that each product of coercivity and thickness in the magnetization direction becomes different. A stator is located outside the rotor with air gap therebetween and configured by an armature core winding. At least one permanent magnet is magnetized by a magnetic field by a current of the armature winding to change a magnetic flux content thereof irreversibly. A short circuited coil is provided to surround a magnetic path portion of the other permanent magnet excluding the magnet changed irreversibly and a portion adjacent to the other permanent magnet where the magnetic flux leaks. A short-circuit current is generated in the short circuited coil by the magnetic flux generated by conducting a magnetization current to the winding. A magnetic field is generated by the short-circuit current.

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Patent Owner(s)

  • KABUSHIKI KAISHA TOSHIBA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Arata, Masanori Totsuka-ku, JP 34 712
Hashiba, Yutaka Yokosuka, JP 23 427
Matsuoka, Yusuke Mie-gun, JP 17 103
Mochizuki, Motoyasu Chuo-ku, JP 27 471
Sakai, Kazuto Yokosuka, JP 34 1078
Takahashi, Norio Izumi, JP 143 1929
Tokumasu, Tadashi Setagaya-ku, JP 41 364
Yuuki, Kazuaki Tokorozawa, JP 41 531

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