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1. 发明授权

US11005349B2 Electric motor system, and turbo compressor provided with same 有权
公开(公告)号：US11005349B2
公开(公告)日：2021-05-11
申请号：US17089396
申请日：2020-11-04
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Takaaki Ono , Yusuke Irino , Yuji Nakazawa
IPC分类号： H02K7/09 , H02K21/04 , F25B1/053 , H02K11/30 , H02K7/14
摘要： An electric motor system includes a drive shaft that rotationally drives a load, a bearingless motor, a power source unit, and a control unit. The bearingless motor includes a rotor and a stator having armature and support windings. The bearingless motor rotationally drives the drive shaft and supports a radial load of the drive shaft in a contactless manner. The power source unit applies a voltage to the armature and support windings. The control unit controls the power source unit so that a radial support force that is a sum of a radial support force caused by a support current and a radial support force caused by both the support current and an armature current is output, and so that one of an armature voltage across the armature winding and the support current is increased and the other of the armature voltage and the support current is decreased.

2. 发明授权

US11454279B2 Thrust magnetic bearing and turbo-compressor with same 有权
公开(公告)号：US11454279B2
公开(公告)日：2022-09-27
申请号：US17033078
申请日：2020-09-25
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Shouhei Yamasuso , Yuji Nakazawa , Keiji Aota
IPC分类号： F16C32/04 , F04D29/058 , H02K7/09 , H02K7/14
摘要： A thrust magnetic bearing includes a stator having a coil, and a rotor. The stator includes main and auxiliary stator magnetic-pole surfaces. The rotor includes main and auxiliary rotor magnetic-pole surfaces facing the main and auxiliary stator magnetic-pole surfaces. When an electric current flows in the coil, an electromagnetic force in an axial direction is generated between the main stator and rotor magnetic-pole surfaces, and an electromagnetic force in a radial direction is generated between the auxiliary stator and rotor magnetic-pole surfaces. When the rotor is displaced in the radial direction, a radial force that acts on the rotor between the auxiliary stator and rotor magnetic-pole surfaces is increased in a direction of the displacement, and a radial force that acts on the rotor between the main stator and rotor magnetic-pole surfaces is increased in a direction opposite to the direction of the displacement.

3. 发明申请

US20150233422A1 MAGNETIC BEARING 有权
标题翻译：磁性轴承
公开(公告)号：US20150233422A1
公开(公告)日：2015-08-20
申请号：US14426111
申请日：2013-08-26
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Yusuke Irino , Yuji Nakazawa
IPC分类号： F16C32/04
CPC分类号： F16C32/0461 , F16C32/048 , F16C32/0489 , F16C2360/44 , F16C2360/45
摘要： A magnetic bearing which would reduce a leakage magnetic flux to be generated between teeth is provided. A predetermined one of its teeth (24) is configured so that a pitch (P1) between the predetermined tooth (24) and one of two adjacent teeth (24) that are located on clockwise and counterclockwise sides thereof in the circumferential direction is broader than a pitch (P2) between the predetermined tooth (24) and the other tooth (24) and that a magnetic flux flows in the same radial direction through the predetermined tooth (24) and the tooth (24) spaced from the predetermined tooth (24) by the narrower pitch (P1) but flows in two different radial directions through the predetermined tooth (24) and the tooth (24) spaced from the predetermined tooth (24) by the broader pitch (P2).
摘要翻译：提供了一种减少在齿之间产生的漏磁通的磁轴承。其预定的一个齿24被构造成使得在圆周方向上位于其顺时针和逆时针侧的预定齿24与两个相邻的齿24中的一个之间的间距（P1）比在预定齿（24）和另一齿（24）之间的间距（P2），并且磁通量通过预定齿（24）和与预定齿（24）间隔开的齿（24）沿相同的径向流动），但是通过预定齿（24）和与预定齿（24）间隔更宽的间距（P2）的两个不同的径向方向流动。

4. 发明授权

US11300131B2 Electric motor system and turbo compressor provided therewith 有权
公开(公告)号：US11300131B2
公开(公告)日：2022-04-12
申请号：US16606440
申请日：2018-04-27
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Yuji Nakazawa , Atsushi Sakawaki
IPC分类号： F04D25/06 , H02K7/09 , H02K7/14 , F04D29/048 , F16C32/04 , F04D29/058 , H02K16/00
摘要： A radial load of a drive shaft is supported by only a plurality of bearingless motors. Maximum values of the radial load acting on the plurality of bearingless motors are not uniform. The bearingless motor, the maximum value of the radial load acting on which is the largest, has a greater maximum value of supporting magnetic flux generated to generate an electromagnetic force for supporting the radial load, compared with the bearingless motor, the maximum value of the radial load acting on which is the smallest. This configuration allows a reduction in size of a rotary system including a load and a drive shaft in an electric motor system.

5. 发明授权

US09689398B2 Magnetic bearing device and compressor 有权
公开(公告)号：US09689398B2
公开(公告)日：2017-06-27
申请号：US14369412
申请日：2012-12-19
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Atsushi Sakawaki , Yuji Nakazawa , Yusuke Irino , Naoya Yamashita
IPC分类号： F04D29/058 , F16C32/04 , F04D25/06 , H02K7/09
CPC分类号： F04D29/058 , F04D25/06 , F16C32/0451 , H02K7/09
摘要： A magnetic bearing body supports a rotating shaft using a combined electromagnetic force of a pair of control electromagnets without contact. A controller detects a control index value based on a first coil current passed through a coil of a first control electromagnet of the pair of control electromagnets which generates an electromagnetic force in the same direction as that of a load exerted on the rotating shaft, the control index value being an index of the degree of margin for error in control depending on a value of the first coil current. And the controller controls a middle value of a pair of coil currents passed through the respective corresponding coils of the pair of control electromagnets so that the control index value approaches a predetermined target index value.

6. 发明授权

US10767890B2 Load operation control system 有权
公开(公告)号：US10767890B2
公开(公告)日：2020-09-08
申请号：US16609085
申请日：2018-05-08
申请人： Daikin Industries, LTD.
发明人： Yuji Nakazawa , Atsushi Sakawaki
IPC分类号： F24F11/86 , F04D27/02 , F25B1/053 , F25B49/02 , H02K7/00 , H02K7/14 , H02K9/10
摘要： A drive shaft rotates a load. A drive support rotates the drive shaft and supports a radial load of the drive shaft in a non-contact manner, by an electromagnetic force generated by the flow of a current within a predetermined current range through the drive support. A control section controls an operation of the load based on a magnetic flux margin degree expressed by the difference between a total magnetic flux amount generated at the drive support and a predetermined limit of the total magnetic flux amount for the drive support. The total magnetic flux amount includes driving magnetic flux and the supporting magnetic flux in a predetermined operation region of the load. The driving magnetic flux is generated at the drive support for rotating the drive shaft. The supporting magnetic flux is generated at the drive support for supporting a radial load of the drive shaft.

7. 发明授权

US09964146B2 Magnetic bearing having reduced leakage magnetic flux 有权
公开(公告)号：US09964146B2
公开(公告)日：2018-05-08
申请号：US14426111
申请日：2013-08-26
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Yusuke Irino , Yuji Nakazawa
IPC分类号： F16C32/04 , H02K7/09
CPC分类号： F16C32/0461 , F16C32/048 , F16C32/0489 , F16C2360/44 , F16C2360/45
摘要： A magnetic bearing which would reduce a leakage magnetic flux to be generated between teeth is provided. A predetermined one of its teeth (24) is configured so that a pitch (P1) between the predetermined tooth (24) and one of two adjacent teeth (24) that are located on clockwise and counterclockwise sides thereof in the circumferential direction is broader than a pitch (P2) between the predetermined tooth (24) and the other tooth (24) and that a magnetic flux flows in the same radial direction through the predetermined tooth (24) and the tooth (24) spaced from the predetermined tooth (24) by the narrower pitch (P1) but flows in two different radial directions through the predetermined tooth (24) and the tooth (24) spaced from the predetermined tooth (24) by the broader pitch (P2).

8. 发明授权

US12027920B2 Rotor, and rotary electric machine 有权
公开(公告)号：US12027920B2
公开(公告)日：2024-07-02
申请号：US17483406
申请日：2021-09-23
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Yusuke Irino , Takaaki Ono , Yuji Nakazawa , Tatsuya Tonari , Hisato Sumitomo , Masatsugu Takemoto
IPC分类号： H02K1/27 , H02K1/276 , H02K21/16
CPC分类号： H02K1/2766 , H02K21/16
摘要： A rotor includes a rotor core having a plurality of magnetic poles. At least one magnetic pole includes a first magnetic pole having three or more circumferentially arranged magnet holes, and a plurality of permanent magnets housed corresponding magnet holes. A portion of the rotor core between adjacent magnet holes has a radially extending region. A maximum radial dimension of each magnet hole is greater than a minimum radial dimension of a portion of the rotor core between a magnet hole radially outer surface and a rotor core outer peripheral surface. The first magnetic pole has a smaller amount of harmonic components in a radial flux density distribution on the rotor core outer peripheral surface, compared to a magnetic pole having a plurality of magnet holes arranged at equal circumferential intervals and a plurality of permanent magnets having substantially the same magnetic flux and number.

9. 发明授权

US11971045B2 Turbo compressor 有权
公开(公告)号：US11971045B2
公开(公告)日：2024-04-30
申请号：US16608709
申请日：2018-05-08
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Yuji Nakazawa , Atsushi Sakawaki , Hirofumi Higashi , Taiichi Nose , Takaaki Ono , Yusuke Irino
IPC分类号： F04D27/02 , F04D17/10 , F04D25/06 , F04D29/051 , F04D29/058 , F16C32/04 , F25B1/053 , H02K7/09 , H02K7/14 , H02P25/024
CPC分类号： F04D27/0261 , F04D17/10 , F04D25/0606 , F04D29/051 , F04D29/058 , F16C32/04 , F16C32/048 , F25B1/053 , H02K7/09 , H02K7/14 , H02P25/024
摘要： A drive support unit of a turbo compressor includes at least one bearingless motor. The at least one bearingless motor includes a rotor-stator pair constituted by a rotor and a stator, and is configured to rotationally drive a drive shaft and to support a radial load of the drive shaft in a contactless manner. Accordingly, it is possible to provide a turbo compressor to which a bearingless motor is applied.

10. 发明授权

US11575293B2 Electric motor and turbo-compressor 有权
公开(公告)号：US11575293B2
公开(公告)日：2023-02-07
申请号：US16760691
申请日：2018-10-25
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Takaaki Ono , Yusuke Irino , Tatsuya Tonari , Yuji Nakazawa , Keiji Aota , Atsushi Sakawaki
IPC分类号： H02K7/09 , F02B39/10 , F16C32/04 , H02K3/12 , H02K3/28
摘要： The stator includes a stator core, a support electric wire formed by one or more conductive wires, and a drive electric wire formed by one or more conductive wires. The stator core includes an annular shaped back yoke and a plurality of teeth on an inner periphery of the back yoke. The support electric wire is disposed so as to pass through a plurality of slots respectively formed between the teeth, and forms a winding portion that generates an electromagnetic force for supporting the rotor in a non-contact manner by being energized. The drive electric wire is disposed so as to pass through the plurality of slots, and forms a winding portion that generates an electromagnetic force for rotating the rotor by being energized. A cross-sectional area per conductive wire of the support electric wire differs from a cross-sectional area per conductive wire of the drive electric wire.

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