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公开(公告)号：US20160344314A1
公开(公告)日：2016-11-24
申请号：US15160386
申请日：2016-05-20
申请人： DENSO CORPORATION , ASMO CO., LTD.
IPC分类号： H02P6/10
CPC分类号： H02P6/10 , F04D25/0606 , H02P6/06 , H02P6/14 , H02P29/50 , H02P2209/07
摘要： A control device capable of suppressing electromagnetic force applied to a motor has a harmonic current calculation section and an operation section. The harmonic current calculation section calculates amplitude and phase of each of harmonic currents to be superimposed over a fundamental current which flows in phase windings of a stator of the motor based on conditions relating to load change of the motor. The operation section generates and transmits instruction signals to an inverter so that the calculated superimposed harmonic currents flow in the phase windings of the stator.
摘要翻译： 能够抑制施加到电动机的电磁力的控制装置具有谐波电流计算部和操作部。 谐波电流计算部基于与电动机的负载变化有关的条件，计算要叠加在基于电动机的定子的相绕组中的基波电流上的谐波电流的振幅和相位。 操作部分生成并发送指令信号到逆变器，使得计算出的叠加谐波电流流过定子的相绕组。
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公开(公告)号：US20220123611A1
公开(公告)日：2022-04-21
申请号：US17426818
申请日：2020-10-19
申请人： DENSO CORPORATION
发明人： Toshihiro UCHIDA
IPC分类号： H02K1/276
摘要： A rotor includes a rotor core, including a magnet accommodation cavity, and a permanent magnet, embedded in the magnet accommodation cavity of the rotor core and including a bent portion located toward a radially inner side of the rotor core. The permanent magnet has a thickness to satisfy an expression of 0.0006D+0.1626−0.5/(D/2)≤Wm/(D/2)≤−0.0006D+0.1626+0.5/(D/2).
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公开(公告)号：US20200244195A1
公开(公告)日：2020-07-30
申请号：US16610564
申请日：2018-06-07
申请人： DENSO CORPORATION
摘要： A motor control device controls a two-phase motor. The two-phase motor obtains a combined torque, which serves as an output torque. The A-phase and B-phase motor portions being joined having a phase difference in terms of structure. The motor control device sets each of A-phase and B-phase drive currents supplied to the A-phase and B-phase motor portions to control the two-phase motor. The motor control device includes a fundamental wave setting unit that sets a sinusoidal fundamental wave current of the A-phase and B-phase drive currents, and a superimposing wave setting unit that sets a high-order harmonic current superimposed on the fundamental wave current. The superimposing wave setting unit sets the high-order harmonic current of at least one of “4n+1”th-order and “4n−1”th-order to reduce a component of “4n”th-order in torque pulsation of the combined torque, and “n” is a natural number.
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公开(公告)号：US20240030761A1
公开(公告)日：2024-01-25
申请号：US18376996
申请日：2023-10-05
申请人： DENSO CORPORATION
CPC分类号： H02K1/276 , H02K1/16 , H02K2213/03
摘要： A rotor has a plurality of magnetic poles each including one of permanent magnets and one of outer core portions. Each of the outer core portions has a radially outer surface that has an arc shape such that the radially outer surface becomes closer to a rotation axis of the rotor as it extends from a magnetic-pole center of the magnetic pole toward both sides in a circumferential direction. A reference circle is defined which has a diameter equal to a maximum diameter of the rotor core and centers on the rotation axis. An outer circumferential surface of the rotor core has, at intersections between the arc-shaped radially outer surfaces of the outer core portions, maximum displacement portions that are most displaced from the reference circle radially inward. A displacement amount of the maximum displacement portions from the reference circle is smaller than a maximum thickness of the permanent magnets.
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公开(公告)号：US20170222583A1
公开(公告)日：2017-08-03
申请号：US15420698
申请日：2017-01-31
申请人： DENSO CORPORATION , ASMO CO., LTD.
CPC分类号： H02P6/16 , H02K1/2786 , H02P6/157 , H02P27/08 , H02P29/50
摘要： In a control apparatus, a magnetic flux information acquiring unit acquires magnetic flux information of magnetic poles of a rotating electric machine. A fundamental setting unit sets a fundamental command value for supplying a fundamental current to a winding of the rotating electric machine. A harmonic setting unit sets, based on the magnetic flux information acquired by the magnetic flux information acquiring unit, a harmonic command value for supplying a reduction current to the winding. The reduction current is a harmonic current for reducing variation in a radial electromagnetic force acting on a rotor of the rotating electric machine. An operating unit operates, based on the fundamental command value set by the fundamental setting unit and the harmonic command value set by the harmonic setting unit, an electric power converter to supply the winding with a drive current that is obtained by superimposing the reduction current on the fundamental current.
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公开(公告)号：US20240297540A1
公开(公告)日：2024-09-05
申请号：US18647600
申请日：2024-04-26
申请人： DENSO CORPORATION
发明人： Toshihiro UCHIDA
IPC分类号： H02K1/276
CPC分类号： H02K1/2766 , H02K2213/03
摘要： A rotor includes a rotor core, including a magnet accommodation cavity, and a permanent magnet, embedded in the magnet accommodation cavity of the rotor core and including a bent portion located toward a radially inner side of the rotor core. The permanent magnet has a thickness to satisfy an expression of
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公开(公告)号：US20240079919A1
公开(公告)日：2024-03-07
申请号：US18507396
申请日：2023-11-13
申请人： DENSO CORPORATION
IPC分类号： H02K1/276
CPC分类号： H02K1/276 , H02K2201/06 , H02K2213/03
摘要： A rotor includes a plurality of rotor units disposed side by side in an axial direction. The plurality of rotor units each include a rotor core, a plurality of permanent magnets, a plurality of magnetic pole sections and a plurality of magnetic pole bordering sections. At least one of the rotor units has a displacement portion in an outer circumferential surface of the rotor core. The displacement portion is displaced radially inward from respective magnetic pole centers of a circumferentially adjacent pair of the magnetic pole sections toward the magnetic pole bordering section between the pair of the magnetic pole sections. The displacement portion is disposed corresponding to at least one of the magnetic pole bordering sections. The magnetic pole centers of at least one of the rotor units are offset in the circumferential direction with respect to the magnetic pole centers of another of the rotor units.
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公开(公告)号：US20230017419A1
公开(公告)日：2023-01-19
申请号：US17954061
申请日：2022-09-27
申请人： DENSO CORPORATION
摘要： An apparatus for manufacturing a rotor includes a magnetizer. The magnetizer is configured to magnetize a permanent magnet in a rotor from outside the rotor. The rotor includes a rotor core having a magnet insertion hole. The permanent magnet is provided in an embedded state in the magnet insertion hole and has a bent-back shape protruding radially inward. The magnetizer includes a first yoke portion, a second yoke portion, and a magnetization coil. The first yoke portion has an opposing portion facing an outer peripheral surface of the rotor. The second yoke portion forms a magnetic path together with the first yoke portion. The magnetization coil is disposed on the magnetic path of the first and second yoke portions. The magnetizer magnetizes the permanent magnet by energizing the magnetization coil to apply a magnetizing magnetic flux at least through the rotor between the first yoke portion and the second yoke portion, which are located opposed to each other in a radial direction of the rotor.
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公开(公告)号：US20230299628A1
公开(公告)日：2023-09-21
申请号：US18201471
申请日：2023-05-24
申请人： DENSO CORPORATION
CPC分类号： H02K1/2773 , H02K21/16
摘要： A rotor includes: a rotor core including a plurality of core sheets that are laminated together and having a plurality of magnet-receiving holes formed in a folded shape; and a plurality of permanent magnets embedded respectively in the magnet-receiving holes. Each of the core sheets has a plurality of first through-holes and a plurality of second through-holes. Each of the first through-holes has a connection portion formed at an intermediate position in the folded shape of a corresponding one of the magnet-receiving holes to connect inner peripheral edges of the first through-hole that face each other in a width direction of the first through-hole. Each of the second through-holes has no connection portion. The core sheets are identical in configuration to each other. The core sheets are laminated so that each of the magnet-receiving holes is constituted of a mixture of the first and second through-holes of the core sheets.
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公开(公告)号：US20230246496A1
公开(公告)日：2023-08-03
申请号：US18133151
申请日：2023-04-11
申请人： DENSO CORPORATION
CPC分类号： H02K1/2773 , H02K21/16
摘要： A rotor is configured such that end portions of permanent magnets protrude, as protruding portions, from axial end faces of a rotor core which are formed as flat surfaces, so as to minimize leakage of magnetic flux of embedded magnet portions of the permanent magnets from the axial end faces of the rotor core; the embedded magnet portions of the permanent magnets are located in the rotor core.
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