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1. 发明专利

JP2012211670A Power transmission device 有权
标题翻译：电力传输装置
公开(公告)号：JP2012211670A
公开(公告)日：2012-11-01
申请号：JP2011078530
申请日：2011-03-31
申请人： Toyota Central R&D Labs Inc , Toyota Motor Corp , Aisin Seiki Co Ltd , アイシン精機株式会社 , トヨタ自動車株式会社 , 株式会社豊田中央研究所
发明人： TSUCHIYA EIJI , WATANABE TAKAO , ASAUMI SHU , MIYANO TATSUYA , MURAKAMI ARATA , OGAWA HIROYUKI , TOYAMA TOMOYUKI
IPC分类号： F16H61/04
摘要： PROBLEM TO BE SOLVED: To shorten a period in which power transmitted to a drive shaft from an engine via a stepped transmission is blocked or reduced when a gear position of the stepped transmission is shifted to the next gear position from the present gear position.SOLUTION: When shifting the gear position of the stepped transmission 44 to the next gear position from the present gear position, by releasing an m-speed engagement member 64-m in an engagement state corresponding to the present gear position and an output-side engagement member 64-5 (or an input-side engagement member 64-7), and by making electromagnetic coupling torque Tcoup act on an output-side rotor 18 from an input-side rotor 28 by an alternate current of a rotor winding 30, rotation speeds Nmg of the output-side rotor 18 and an input shaft 61 are changed. By this arrangement, torque made to act on the input shaft 61 can be increased, and a time necessary for changing the rotation speed Nmg of the input shaft 61 to a target input-shaft rotation speed Nrefn corresponding to the next gear position can be shortened.
摘要翻译：要解决的问题：为了缩短当阶梯式变速器的档位从当前档位转移到下一个档位时，通过阶梯式变速器从发动机传递到驱动轴的动力被阻挡或减小的时间段位置。解决方案：通过在对应于当前齿轮位置的接合状态下释放一个m速接合构件64-m，将阶梯式变速器44的齿轮位置从当前档位转换到下一个档位，侧接合构件64-5（或输入侧接合构件64-7），并且通过使转子绕组的交流电流使电磁耦合转矩Tcoup从输入侧转子28作用在输出侧转子18上 30，输出侧转子18和输入轴61的转速Nmg发生变化。通过这种布置，可以增加作用在输入轴61上的扭矩，并且可以缩短将输入轴61的转速Nmg改变为对应于下一档位的目标输入轴转速Nrefn所需的时间。版权所有（C）2013，JPO＆INPIT

2. 发明专利

JP2013062921A Rotary electric machine and power transmitting device 有权
标题翻译：旋转电机和发电装置
公开(公告)号：JP2013062921A
公开(公告)日：2013-04-04
申请号：JP2011198984
申请日：2011-09-13
申请人： Toyota Motor Corp , トヨタ自動車株式会社 , Toyota Central R&D Labs Inc , 株式会社豊田中央研究所 , Aisin Seiki Co Ltd , アイシン精機株式会社
发明人： SHIINA TAKAHIRO , MURAKAMI ARATA , FUJIYOSHI NAOSHI , OSADA YASUMITSU , WATANABE TAKAO , ASAUMI SHU , TSUCHIYA EIJI , TOYAMA TOMOYUKI
IPC分类号： H02K16/02 , H02K5/04 , H02K5/16 , H02K13/00
CPC分类号： H02K16/02 , B60L11/14 , B60L2220/52 , B60L2240/486 , B60L2240/507 , H02K13/003 , H02K51/00 , H02K99/00 , Y02T10/641 , Y02T10/70 , Y02T10/7077
摘要： PROBLEM TO BE SOLVED: To provide a rotary electric machine in which a length in an axial direction can be reduced.SOLUTION: A composite motor 14 as a rotary electric machine includes: a magnet rotor 19 rotatably supported by a plurality of bearings B3 and B4; a winding rotor 20 supported by a plurality of bearings B5 and B6 so as to rotate relative to the magnet rotor 19 inside the magnet rotor 19, and having a rotor winding 20b; and a plurality of slip ring mechanisms 25. A space is formed in an inner periphery of the winding rotor 20. The plurality of slip ring mechanisms 25 are at least partially disposed in the space of the inner periphery of the winding rotor 20. The bearings B3 to B6 includes the bearings B3 and B6 having an inner diameter larger than a radial dimension of the slip ring mechanisms 25. The bearings B3 and B6 are disposed on the radial outside of the slip ring mechanisms 25.
摘要翻译：要解决的问题：提供可以减小轴向长度的旋转电机。解决方案：作为旋转电机的复合电动机14包括：由多个轴承B3和B4可旋转地支撑的磁体转子19; 由多个轴承B5和B6支撑的绕组转子20相对于磁体转子19内的磁铁转子19旋转，并具有转子绕组20b; 和多个滑环机构25.在绕组转子20的内周形成有空间。多个滑环机构25至少部分地设置在绕组转子20的内周的空间中。轴承 B3至B6包括具有大于滑环机构25的径向尺寸的内径的轴承B3和B6。轴承B3和B6设置在滑环机构25的径向外侧。版权所有（C））2013，JPO＆INPIT

3. 发明专利

JP2012222843A Rotary electric machine 有权
标题翻译：旋转电机
公开(公告)号：JP2012222843A
公开(公告)日：2012-11-12
申请号：JP2011082494
申请日：2011-04-04
申请人： Toyota Central R&D Labs Inc , Toyota Motor Corp , Aisin Seiki Co Ltd , アイシン精機株式会社 , トヨタ自動車株式会社 , 株式会社豊田中央研究所
发明人： ASAUMI SHU , WATANABE TAKAO , TSUCHIYA EIJI , MURAKAMI ARATA , OGAWA HIROYUKI , TOYAMA TOMOYUKI
IPC分类号： H02K5/14 , H01R39/08 , H01R39/39 , H02K13/00 , H02K16/02
CPC分类号： Y02T10/641
摘要： PROBLEM TO BE SOLVED: To prevent occurrence of abnormal wear at a brush and a slip ring because of re-sticking of wear powder generated at a sliding part between the slip ring and the brush.SOLUTION: An air stream control plate 97u-1 is held by a holding plate 101-1 at a position between brushes 96u-3 and 96u-1, adjoining each other along the circumferential direction of the slip ring. The wear powder generated at the sliding part between the brush 96u-3 on the rear side in the rotational direction of the slip ring and a slip ring 95u is flown by air stream and scattered to the front side in the rotational direction of the slip ring. However, the scattering of wear powder to the front side in the rotational direction of the slip ring is prevented by the air stream control plate 97u-1, and is collected by a collecting surface 99u-1. Consequently, the wear powder is prevented from biting into and re-sticking to the sliding part between the brush 96u-1 on the front side in the rotational direction of the slip ring and the slip ring 95u.
摘要翻译：要解决的问题：为了防止由于在滑环和刷子之间的滑动部分产生的磨损粉末的重新粘附而在刷子和滑环处发生异常磨损。解决方案：气流控制板97u-1由保持板101-1保持在电刷96u-3和96u-1之间，沿着滑环的圆周方向彼此相邻的位置。在滑环的旋转方向的后侧的刷子96u-3之间的滑动部分和滑环95u之间产生的磨损粉末被空气流流动并且在滑环的旋转方向上散射到前侧。然而，通过气流控制板97u-1防止了磨损粉末向滑环的旋转方向前方的散射，并被收集面99u-1收集。因此，防止磨损粉末咬入并再粘附到滑环的旋转方向前侧的刷子96u-1与滑环95u之间的滑动部分。版权所有（C）2013，JPO＆INPIT

4. 发明专利

JP2012192905A Drive apparatus for hybrid vehicle 有权
标题翻译：混合动力车用驱动装置
公开(公告)号：JP2012192905A
公开(公告)日：2012-10-11
申请号：JP2011060178
申请日：2011-03-18
申请人： Aisin Seiki Co Ltd , Toyota Central R&D Labs Inc , Toyota Motor Corp , アイシン精機株式会社 , トヨタ自動車株式会社 , 株式会社豊田中央研究所
发明人： TOYAMA TOMOYUKI , WATANABE TAKAO , TSUCHIYA EIJI , ASAUMI SHU , MIYANO TATSUYA , MURAKAMI ARATA , OGAWA HIROYUKI
IPC分类号： B60W10/08 , B60K6/26 , B60K6/448 , B60K6/547 , B60L11/14 , B60L15/20 , B60W10/04 , B60W10/06 , B60W10/10 , B60W10/11 , B60W20/00
CPC分类号： B60L11/14 , B60L11/123 , B60L11/1861 , B60L15/20 , B60L2210/40 , B60L2220/14 , B60L2220/52 , B60L2240/12 , B60L2240/421 , B60L2240/423 , B60L2240/441 , B60L2240/443 , B60L2240/486 , Y02T10/6217 , Y02T10/641 , Y02T10/645 , Y02T10/7005 , Y02T10/7044 , Y02T10/705 , Y02T10/7077 , Y02T10/7241 , Y02T10/7275
摘要： PROBLEM TO BE SOLVED: To provide a drive apparatus for a hybrid vehicle which carries out drive control for causing an engine and a rotating electric machine to operate in an optimum manner for an efficient reduction of fuel consumption.SOLUTION: The drive apparatus includes the rotating electric machine having a stator and first and second rotors, an engine connected to the first rotor, a transmission connected to the second rotor, a power converting/supply device which supplies AC power output from a coil of the first rotor, to a coil of the stator, and a controller. The controller has an information acquiring means S1, a required torque calculating means S2, means S3 to S6 which temporarily save an engine torque for achieving optimum efficiency and calculate a direct torque transmitted directly and a power-conversion torque transmitted in the converted form of AC power, a means S7 which compares the sum of the direct and the power-conversion torques with a required torque, means S8 to S15 which when the sum does not match, adjust supply of AC power and when the adjustment is impossible, adjusts the engine torque, and a means S16 which when the sum matches, executes control.
摘要翻译：解决的问题：提供一种混合动力车辆的驱动装置，该混合动力车辆执行驱动控制，以使发动机和旋转电机以最佳方式操作，以有效地降低燃料消耗。解决方案：驱动装置包括具有定子和第一和第二转子的旋转电机，连接到第一转子的发动机，连接到第二转子的变速器，电力转换/供给装置，其提供从第一转子的线圈，定子的线圈和控制器。控制器具有信息获取装置S1，所需扭矩计算装置S2，暂时保存用于实现最佳效率的发动机转矩并计算直接传递的直接转矩的转速装置S3和转换形式AC传递的动力转换扭矩电力，将直接和功率转换转矩之和与所需转矩进行比较的装置S7;装置S8至S15，当总和不匹配时，调整AC电力供应，并且当不可能进行调整时，调整发动机扭矩，以及当和相匹配时，执行控制的装置S16。版权所有（C）2013，JPO＆INPIT

5. 发明专利

JP2011205815A Rotary electric machine 有权
标题翻译：旋转电机
公开(公告)号：JP2011205815A
公开(公告)日：2011-10-13
申请号：JP2010071785
申请日：2010-03-26
申请人： Aisin Seiki Co Ltd , Toyota Central R&D Labs Inc , Toyota Motor Corp , アイシン精機株式会社 , トヨタ自動車株式会社 , 株式会社豊田中央研究所
发明人： ASAUMI SHU , WATANABE TAKAO , TSUCHIYA EIJI , MURAKAMI ARATA , OGAWA HIROYUKI , OKAWA AKIYOSHI , TOYAMA TOMOYUKI
IPC分类号： H02K9/06 , H02K13/00 , H02K13/02 , H02K16/02
CPC分类号： B60L11/14 , B60L3/0061 , B60L11/123 , B60L15/20 , B60L2210/10 , B60L2210/30 , B60L2210/40 , B60L2220/14 , B60L2220/52 , B60L2240/12 , B60L2240/36 , B60L2240/421 , B60L2240/423 , B60L2240/441 , B60L2240/443 , B60L2240/486 , B60L2270/145 , Y02T10/6217 , Y02T10/641 , Y02T10/645 , Y02T10/7077 , Y02T10/7216 , Y02T10/7241 , Y02T10/7275
摘要： PROBLEM TO BE SOLVED: To efficiently execute cooling of slip rings and brushes without increasing the size of a configuration of a rotary electric machine.SOLUTION: Each air-blowing blade 100 is erected on each bus bar 99u, 99v, and 99w for electrically connecting each slip ring 97u, 97v, and 97w with each rotor winding 30. Cooling air is generated by air-blowing blades 100 during rotation of an input shaft 34. The cooling air is blown against the slip rings 97 and brushes 98 to cool the slip rings 97u, 97v, and 97w and the brushes 98u, 98v, and 98w.
摘要翻译：要解决的问题：在不增加旋转电机的结构尺寸的情况下有效地执行滑环和电刷的冷却。解决方案：每个吹气叶片100竖立在每个母线99u，99v和99w上用于电连接每个滑环97u，97v和97w具有每个转子绕组30.在输入轴34旋转期间，由空气喷射叶片100产生冷却空气。冷却空气吹向滑环97和刷子98以冷却滑动环97u，97v和97w以及刷98u，98v和98w。

6. 发明专利

JP2012210903A Power transmission device 审中-公开
标题翻译：电力传输装置
公开(公告)号：JP2012210903A
公开(公告)日：2012-11-01
申请号：JP2011078532
申请日：2011-03-31
申请人： Toyota Central R&D Labs Inc , Toyota Motor Corp , Aisin Seiki Co Ltd , アイシン精機株式会社 , トヨタ自動車株式会社 , 株式会社豊田中央研究所
发明人： TSUCHIYA EIJI , WATANABE TAKAO , ASAUMI SHU , MIYANO TATSUYA , MURAKAMI ARATA , OGAWA HIROYUKI , TOYAMA TOMOYUKI
IPC分类号： B60W10/08 , B60K6/26 , B60K6/48 , B60L11/14 , B60L15/20 , B60W20/00 , F02N5/04
CPC分类号： H02P25/22 , B60K6/30 , B60K6/448 , B60K2006/262 , B60K2006/266 , B60L11/123 , B60L11/14 , B60W30/18054 , B60W30/192 , F02N5/04 , F02N11/08 , F02N15/02 , F02N2300/2002 , H02K7/112 , H02K16/02 , H02K17/24 , H02K21/24 , Y02T10/6217 , Y02T10/6243 , Y02T10/641 , Y02T10/7077 , Y02T10/7258
摘要： PROBLEM TO BE SOLVED: To efficiently start an engine, even if electric energy that can be supplied from a power storage device is small.SOLUTION: During an inertial energy storage operation, electric power conversion at an inverter 40 is controlled such that a direct current electric power from an electric power storage device 42 is converted into an alternating current by the inverter 40 to be supplied to stator windings 20, such that torque in the direction of engine rotation is applied to an output side rotor 18 from a stator 16 to rotatively drive the output side rotor 18 in a state where power transmission from the output side rotor 18 to a drive axle 37 is stopped. During a cranking operation after the inertial energy storage operation, the electric power conversion at an inverter 41 is controlled to permit application of the alternating current to rotor windings 30, such that a torque in the direction of engine rotation is applied to an input side rotor 28 from the output side rotor 18, thereby rotatively driving an input side rotor 28 to crank the engine 36.
摘要翻译：要解决的问题：即使能够从蓄电装置供给的电力小，为了有效地起动发动机。解决方案：在惯性能量存储操作期间，控制逆变器40的电力转换，使得来自蓄电装置42的直流电力由逆变器40转换成交流电，供给定子绕组20，使得在从输出侧转子18到驱动轴37的动力传递为止的状态下，发动机旋转方向的转矩从定子16施加到输出侧转子18，以可变地驱动输出侧转子18 停止。在惯性能量存储操作之后的起动操作期间，控制逆变器41的电力转换，以允许向转子绕组30施加交流电，使得发动机转动方向的转矩施加到输入侧转子 28，从输出侧转子18转动驱动输入侧转子28，使发动机36起动。版权所有（C）2013，JPO＆INPIT

7. 发明专利

JP2011250620A Rotary electric machine 有权
标题翻译：旋转电机
公开(公告)号：JP2011250620A
公开(公告)日：2011-12-08
申请号：JP2010122528
申请日：2010-05-28
申请人： Aisin Seiki Co Ltd , Toyota Central R&D Labs Inc , Toyota Motor Corp , アイシン精機株式会社 , トヨタ自動車株式会社 , 株式会社豊田中央研究所
发明人： OSADA YASUMITSU , WATANABE TAKAO , ASAUMI SHU , TSUCHIYA EIJI , MATSUHATA DAIKI , OZAWA TADAO , MURAKAMI ARATA , OGAWA HIROYUKI , OKAWA AKEMI , TOYAMA TOMOYUKI
IPC分类号： H02K9/28 , H02K16/02 , H02K21/28
CPC分类号： B60L11/14 , B60L3/0061 , B60L11/123 , B60L15/20 , B60L15/2054 , B60L2210/14 , B60L2210/40 , B60L2220/14 , B60L2220/52 , B60L2240/12 , B60L2240/36 , B60L2240/421 , B60L2240/423 , B60L2240/441 , B60L2240/443 , B60L2240/486 , B60L2260/26 , Y02T10/6217 , Y02T10/641 , Y02T10/645 , Y02T10/7077 , Y02T10/7225 , Y02T10/7241 , Y02T10/7275
摘要： PROBLEM TO BE SOLVED: To provide a rotary electric machine which prevents cooling fluid supplied to a rotor conductor from getting attached to a slip ring and a slide of a brush.SOLUTION: A partition member 82 seals cooling liquid supplied to a rotor coil 30 by a seal member 84. A bus bar 99 electrically connected to a slip ring 97u protrudes to an input side rotor 28 side through the position between the seal member 84 and an input axis 34 from the slip ring 97u side with respect to the rotor rotation axis direction, to be electrically connected to a bus bar 79 at a protruded portion 99a. An insulation member 90 encapsulates a portion 99b, which goes at least between the seal member 84 and the input axis 34 in the bus bar 99.
摘要翻译：要解决的问题：提供一种旋转电机，其防止供应到转子导体的冷却流体附接到滑环和刷子的滑动件。解决方案：分隔构件82通过密封构件84密封供给到转子线圈30的冷却液。电连接到滑环97u的汇流条99通过密封构件的位置突出到输入侧转子28侧 84和相对于转子旋转轴线方向的滑环97u侧的输入轴34在突出部99a处与母线79电连接。绝缘构件90封装至少在密封构件84和汇流条99中的输入轴34之间的部分99b。（C）2012年，JPO和INPIT

8. 发明专利

JP2014110743A Cooling structure of slip ring device 审中-公开
标题翻译：滑环装置的冷却结构
公开(公告)号：JP2014110743A
公开(公告)日：2014-06-12
申请号：JP2012265709
申请日：2012-12-04
申请人： Toyota Motor Corp , トヨタ自動車株式会社 , Toyota Central R&D Labs Inc , 株式会社豊田中央研究所 , Toyota Industries Corp , 株式会社豊田自動織機
发明人： TOMINAGA SATOSHI , SHIINA TAKAHIRO , MURAKAMI ARATA , TAKAYAMA HITOSHI , ASAUMI SHU , WATANABE TAKAO , KAMITSUJI KIYOSHI , YUMOTO SHUJI , FUJIWARA HIROFUMI
IPC分类号： H02K9/28 , H02K13/00
摘要： PROBLEM TO BE SOLVED: To provide a cooling structure capable of enhancing the cooling performance of a slip ring device compared to the conventional.SOLUTION: A cooling structure for cooling a slip ring device 2 by feeding oil to a refrigerant passage 11 provided in an input shaft 3 is applied to the slip ring device 2 including ring members 5a-5c provided on the outer peripheral surface of the input shaft 3, and brushes 6a-6c in contact with the ring members 5a-5c. The refrigerant passage 11 includes a first channel 12, a second channel 13 provided between the first channel 12 and the ring members 5a-5c, and an interconnection passage 14 provided to extend to the outer peripheral side from the first channel 12 and interconnecting the first channel 12 and the second channel 13. Oil flows in the order of the first channel 12, the interconnection passage 14 and the second channel 13.
摘要翻译：要解决的问题：提供一种能够提高滑环装置与现有技术相比的冷却性能的冷却结构。解决方案：一种用于通过将油输送到设置在输入端的制冷剂通道11来冷却滑环装置2的冷却结构轴3被施加到包括设置在输入轴3的外周面上的环形构件5a-5c的滑环装置2和与环构件5a-5c接触的刷6a-6c。制冷剂通道11包括第一通道12，设置在第一通道12和环形构件5a-5c之间的第二通道13以及设置成从第一通道12延伸到外周侧并互连第一通道12的互连通道14。通道12和第二通道13.油按照第一通道12，互连通道14和第二通道13的顺序流动。

9. 发明专利

JP2014054020A Dynamo-electric machine 有权
标题翻译： DYNAMO-ELECTRIC MACHINE
公开(公告)号：JP2014054020A
公开(公告)日：2014-03-20
申请号：JP2012195371
申请日：2012-09-05
申请人： Toyota Industries Corp , 株式会社豊田自動織機 , Toyota Motor Corp , トヨタ自動車株式会社 , Toyota Central R&D Labs Inc , 株式会社豊田中央研究所
发明人： YUMOTO SHUJI , KUBO HIDETO , HAYASHI HIROTO , KAMITSUJI KIYOSHI , MATSUMOTO SHOHEI , YOSHIHARA KOJI , FUJIWARA HIROFUMI , MURAKAMI ARATA , SHIINA TAKAHIRO , ASAUMI SHU , TAKAYAMA HITOSHI , WATANABE TAKAO
IPC分类号： H02K13/00
摘要： PROBLEM TO BE SOLVED: To provide dynamo-electric machine in which the cooling efficiency of brushes coming into contact with a rotating electric connection, and removal efficiency of abrasion powder generated from the brushes can be enhanced.SOLUTION: A dynamo-electric machine 1 includes a rotatable rotating shaft 10, and a slip ring 110 rotating together with the rotating shaft 10 and having a cylindrical outer peripheral surface 111a which comes into contact with brushes 105aa-105ca while rotating. The slip ring 110 has a hole 113 provided in a contact region 111aa of the outer peripheral surface 111a with which the brushes 105aa-105ca come into contact, and a protrusion 112 provided in a non-contact region 111ab of the outer peripheral surface 111a with which the brushes 105aa-105ca do not come into contact.
摘要翻译：要解决的问题：提供一种电动机，其中电刷与旋转电气连接接触的冷却效率，以及从电刷产生的磨损粉末的去除效率可以提高。解决方案：发电机1包括可旋转的旋转轴10和与旋转轴10一起旋转的滑环110，并且具有与旋转时的刷子105aa-105ca接触的圆筒形外周面111a。滑环110具有设置在电刷105aa-105ca与其接触的外周面111a的接触区域111aa中的孔113，以及设置在外周面111a的非接触区域111ab中的突起112，电刷105aa-105ca不接触。

10. 发明专利

JP2014030339A Rotary electric machine 审中-公开
标题翻译：旋转电机
公开(公告)号：JP2014030339A
公开(公告)日：2014-02-13
申请号：JP2013132471
申请日：2013-06-25
申请人： Toyota Industries Corp , 株式会社豊田自動織機 , Toyota Motor Corp , トヨタ自動車株式会社 , Toyota Central R&D Labs Inc , 株式会社豊田中央研究所
发明人： YOSHIHARA KOJI , KUBO HIDETO , HAYASHI HIROTO , MATSUMOTO SHOHEI , YUMOTO SHUJI , FUJIWARA HIROFUMI , KAMITSUJI KIYOSHI , SHIINA TAKAHIRO , MURAKAMI ARATA , ASAUMI SHU , TAKAYAMA HITOSHI , WATANABE TAKAO
IPC分类号： H02K9/28 , H02K13/00
CPC分类号： H02K9/28 , H02K13/003
摘要： PROBLEM TO BE SOLVED: To provide a rotary electric machine capable of improving cooling efficiency of respective electrodes of a brush device with simple constitution.SOLUTION: Electrodes 5a, 5b, and 5c of a brush device 5 have annular springs 6a, 6b, and 6c which area fixed to a rotary shaft 4 and can rotate together with the rotary shaft 4, brushes 7a, 7b, and 7c which are provided in contact with the spring rings 6a, 6b, and 6c respectively. and annular brush fixation parts 8a, 8b, and 8c to which the brushes 7a, 7b, and 7c are fixed respectively. The brush fixation parts 8a, 8b, and 8c have circular holes 10a, 10b, and 10c into which the rotary shaft 4 is inserted respectively, and gaps 11a, 11b, and 11c are formed between the rotary shaft 4 and brush fixation parts 8a, 8b, and 8c respectively. The gaps 11a, 11b, and 11c decrease in area in this order.
摘要翻译：要解决的问题：提供一种能够以简单的结构提高刷子装置的各电极的冷却效率的旋转电机。解决方案：刷装置5的电极5a，5b和5c具有环形弹簧6a，6b和6c 哪个区域固定在旋转轴4上，并且可以分别与设置成与弹簧环6a，6b和6c接触的旋转轴4，电刷7a，7b和7c一起旋转。以及分别固定有电刷7a，7b，7c的环形刷固定部8a，8b，8c。刷固定部8a，8b，8c分别具有分别插入旋转轴4的圆形孔10a，10b，10c，在旋转轴4和刷固定部8a之间形成间隙11a，11b，11c， 8b和8c。间隙11a，11b，11c的面积依次减小。

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