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AssigneeKabushiki Kaisha Toshiba
InventorsSyou Fukumoto, Koji Ooishi, Makoto Matsushita, Daisuke Misu, Katsutoku Takeuchi, Yutaka Hashiba, Norio Takahashi, Kazuaki Yuuki, Toshio Hasebe
Estimating the term…
A synchronous reluctance motor includes: a rotor shaft; a rotor core fixed to the rotor shaft and on which a plurality of flux barriers are formed; a stator core on which a plurality of protruding stator teeth are formed; and multiphase armature windings of a plurality of poles wound around the plurality of stator teeth. The flux barriers include a plurality of first flux barriers formed to be spaced out in the circumferential direction from each other and extend in a radial direction, and a plurality of second flux barriers formed in each of circumferential angular regions sandwiched between the first flux barriers to form a curved surface convex toward the center of the rotation-axis and to spread and be spaced out in the circumferential direction from each other.
A synchronous reluctance motor comprising:
A rotor of a synchronous reluctance motor equipped with a stator core including an armature winding, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Rotor cores with salient poles ; Variable reluctance rotors: variable reluctance rotors
Rotor cores with permanent magnets: inner rotors
Rotating parts of the magnetic circuit: means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
Synchronous motors: for multi-phase current
About 8 years 2 months of term left · ends 2 Jan 2035 (estimated)
The present invention relates to a synchronous reluctance motor and a rotor therefor.
Among known conventional synchronous electric motors are: a permanent magnet synchronous electric motor (PMSM), which includes a permanent magnet in a rotor; a synchronous electric motor which includes field coils in a rotor (FCSM: Field Coil Synchronous Motor); and a reluctance motor (RN), which includes magnetic salient poles in a rotor.
A PMSM has no power loss in magnetic creation and is high in efficiency. However, field-weakening control needs to be performed at the time of high-speed rotation. Moreover, there are problems related to the mechanical strength and thermal durability of the permanent magnet
FIG. 1 is a cross-sectional view of a synchronous reluctance motor, which is perpendicular to the direction of a rotation axis, according to a first embodiment.
FIG. 2 is a detailed, partial cross-sectional view of the synchronous reluctance motor, which is perpendicular to the direction of the rotation axis, according to the first embodiment.
FIG. 3 is a wiring diagram of armature windings of the synchronous reluctance motor according to the first embodiment.
FIG. 1 is a cross-sectional view of a synchronous reluctance motor, which is perpendicular to the direction of a rotation axis, according to a first embodiment. FIG. 2 is a detailed, partial cross-sectional view of the synchronous reluctance motor, which is perpendicular to the direction of the rotation axis, according to the first embodiment. FIG. 2 is a cross-sectional view of one-fourth of the synchronous reluctance motor. However, FIG. 2 is a diagram showing the one-fourth portion only because of ease of explanation. This does not mean that the synchronous reluctance motor can be divided on a one-fourth basis.
A synchronous reluctance motor 100 includes, in a housing (not shown), a stator 10 and a rotor 20.
The stator 10 includes a stator core 11 and a plurality of stator teeth 12.