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公开(公告)号：US11011964B2
公开(公告)日：2021-05-18
申请号：US16301957
申请日：2017-05-19
摘要： A cage induction motor includes a rotor core that is rotatable about a central axis, and a shaft to which the rotor core is fixed. The rotor core includes an annular yoke and a plurality of spokes. The yoke supports at least one conductor. The plurality of spokes are arranged apart from one another in a circumferential direction of the yoke, are provided between the yoke and the shaft, and support the yoke.
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公开(公告)号：US10587159B2
公开(公告)日：2020-03-10
申请号：US16298095
申请日：2019-03-11
摘要： According to one embodiment, a rotor includes a shaft and a rotor core. A plurality of flux barriers are formed at the rotor core. The flux barrier has a plurality of bridges, and one or more barrier regions. When a width of the bridge of a first flux barrier is defined as wa, a width of the bridge of a second flux barrier is defined as wb, a value obtained by dividing a radius of a smallest circle that is tangent to a central line of the first flux barrier by an outer radius of the rotor core is defined as a, and a value obtained by dividing a radius of a smallest circle that is tangent to a central line of the second flux barrier by the outer radius of the rotor core is defined as b, and when f(x)=(1−x{circumflex over ( )}2){circumflex over ( )}(3/2) and g(x)=(1−x{circumflex over ( )}3), a relationship of f(b)/f(a)≤wb/wa≤g(b)/g(a) is satisfied.
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公开(公告)号：US10554081B2
公开(公告)日：2020-02-04
申请号：US16387583
申请日：2019-04-18
申请人： Toshiba Industrial Products and Systems Corporation , Toshiba Infrastructure Systems & Solutions Corporation
摘要： A synchronous reluctance rotary electric machine of an embodiment includes a shaft and a rotor core. The shaft rotates around a rotation axis. The rotor core is fixed to the shaft, includes four layers of hollow parts having a convex shape toward a radially inner side formed for each pole in cross section, and includes bridges between the respective hollow parts and an outer circumferential surface thereof. Then, in each pole, when a center in a circumferential direction is a pole center, both ends in the circumferential direction are pole ends, and the plurality of bridges are a first layer bridge, a second layer bridge, a third layer bridge, and a fourth layer bridge in order from the pole center toward each of the pole ends, a circumferential width between the second layer bridge and the third layer bridge is set to be greater than a circumferential width between the first layer bridge and the second layer bridge and a circumferential width between the third layer bridge and the fourth layer bridge.
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公开(公告)号：US20190109527A1
公开(公告)日：2019-04-11
申请号：US16211576
申请日：2018-12-06
摘要： According to one embodiment a synchronous reluctance rotating electrical machine of an embodiment has a shaft and a rotor core. The rotor core is fixed to the shaft, in which cavity portions being formed in a projected shape toward a radially inward direction are formed into multilayers for each pole and bridges are respectively formed between the cavity portions and an outer circumferential surface. The thickness of an outermost bridge positioned outermost on the pole end side among the plurality of bridges is formed to be gradually thicker from the pole center side toward the pole end side. Among the plurality of bridges, the thickness of an intermediate bridge positioned on the pole center side of the outermost bridge with one bridge interposed therebetween is formed to be gradually thicker from the pole end side toward the pole center side.
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公开(公告)号：US20190245394A1
公开(公告)日：2019-08-08
申请号：US16387583
申请日：2019-04-18
申请人： Toshiba Industrial Products and Systems Corporation , Toshiba Infrastructure Systems & Solutions Corporation
摘要： A synchronous reluctance rotary electric machine of an embodiment includes a shaft and a rotor core. The shaft rotates around a rotation axis. The rotor core is fixed to the shaft, includes four layers of hollow parts having a convex shape toward a radially inner side formed for each pole in cross section, and includes bridges between the respective hollow parts and an outer circumferential surface thereof. Then, in each pole, when a center in a circumferential direction is a pole center, both ends in the circumferential direction are pole ends, and the plurality of bridges are a first layer bridge, a second layer bridge, a third layer bridge, and a fourth layer bridge in order from the pole center toward each of the pole ends, a circumferential width between the second layer bridge and the third layer bridge is set to be greater than a circumferential width between the first layer bridge and the second layer bridge and a circumferential width between the third layer bridge and the fourth layer bridge.
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公开(公告)号：US10778052B2
公开(公告)日：2020-09-15
申请号：US16377284
申请日：2019-04-08
申请人： Toshiba Industrial Products and Systems Corporation , Toshiba Infrastructure Systems & Solutions Corporation
摘要： A synchronous reluctance type rotary electric machine of an embodiment includes a shaft and a rotor core. The shaft rotates around a rotation axis. The rotor core is fixed to the shaft and includes multi-layered hollow parts having a convex shape toward a radially inward side formed for each pole in cross section. Then, when a center in a circumferential direction of one pole is a pole center, a hollow part closest to the shaft among the plurality of hollow parts is a first hollow part, a hollow part positioned next to the first hollow part is a second hollow part, and a hollow part positioned on a side opposite to the first hollow part with respect to the second hollow part is a third hollow part, a width W1 between the first hollow part and the second hollow part on the pole center and a width W2 between the second hollow part and the third hollow part on the pole center are set to satisfy W1≤W2.
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公开(公告)号：US10720818B2
公开(公告)日：2020-07-21
申请号：US16381536
申请日：2019-04-11
申请人： Toshiba Industrial Products and Systems Corporation , Toshiba Infrastructure Systems & Solutions Corporation
摘要： A synchronous reluctance type rotary electric machine of an embodiment includes a shaft, a rotor core, rotor core pressers, a plurality of conductor bars, and short-circuit rings. The shaft rotates around a rotation axis. The rotor core is fixed to the shaft and includes multi-layered hollow parts having a convex shape toward a radially inward side formed for each pole in cross section. The rotor core pressers hold the rotor core by pressing the rotor core from both sides in a rotation axis direction. The plurality of conductor bars are disposed in the hollow parts to extend along the rotation axis and have both ends protruding through the rotor core pressers. The short-circuit rings are provided at both ends of each of the plurality of conductor bars and connect the plurality of conductor bars together. Thus, the conductor bars are fixed to the rotor core pressers.
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公开(公告)号：US10749420B2
公开(公告)日：2020-08-18
申请号：US16211576
申请日：2018-12-06
摘要： According to one embodiment a synchronous reluctance rotating electrical machine of an embodiment has a shaft and a rotor core. The rotor core is fixed to the shaft, in which cavity portions being formed in a projected shape toward a radially inward direction are formed into multilayers for each pole and bridges are respectively formed between the cavity portions and an outer circumferential surface. The thickness of an outermost bridge positioned outermost on the pole end side among the plurality of bridges is formed to be gradually thicker from the pole center side toward the pole end side. Among the plurality of bridges, the thickness of an intermediate bridge positioned on the pole center side of the outermost bridge with one bridge interposed therebetween is formed to be gradually thicker from the pole end side toward the pole center side.
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公开(公告)号：US20190229567A1
公开(公告)日：2019-07-25
申请号：US16373678
申请日：2019-04-03
申请人： Toshiba Industrial Products and Systems Corporation , Toshiba Infrastructure Systems & Solutions Corporation
发明人： Masaaki Matsumoto , Takashi Araki , Yuji Yamamoto , Katsutoku Takeuchi , Makoto Matsushita , Toshio Hasebe
摘要： A synchronous reluctance type rotary electric machine of an embodiment has a rotor core. The rotor core includes a plurality of poles, multi-layered hollow parts having a convex shape toward a side radially inward formed for each pole in cross section, and a bridge formed between each of the hollow parts and an outer circumferential surface thereof. When a boundary between two adjacent poles is a pole boundary, a groove is formed on at least one of both sides sandwiching the pole boundary at positions other than on the pole boundary on the outer circumferential surface of the rotor core.
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公开(公告)号：US10530203B2
公开(公告)日：2020-01-07
申请号：US16270028
申请日：2019-02-07
摘要： According to one embodiment, a rotor includes a shaft and a rotor core fixed to the shaft. A plurality of flux barriers are formed at the rotor core. Each of the flux barriers is formed with a plurality of bridges, and one or more barrier regions that have a lower permeability than a portion other than each of the flux bathers in the rotor core between the plurality of bridges. A permanent magnet is provided in at least one of the barrier regions. A magnetizing direction of the permanent magnet is directed in a direction that intersects a longitudinal direction of the flux barrier. A value of (μ0×SM×Br)/(μre×tFB×wB) is within a range between 1.2 and 3.0.
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