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公开(公告)号：US10320265B2
公开(公告)日：2019-06-11
申请号：US15337131
申请日：2016-10-28
Applicant: Mitsuba Corporation
Inventor： Hiroto Tanaka , Takeshi Kanai , Masaaki Kimura , Koji Tsuchiya , Hiroji Okabe , Toshiyuki Amagasa , Hachidai Watanabe
IPC: H02K11/21 , H02K7/116 , H02K5/14 , H02K11/215 , H02K11/33 , H02K11/38 , H02K9/22 , H02K9/28 , H02K13/00 , F16H57/039 , F16H1/16 , F16H57/04 , B60S1/08 , B60S1/26 , H02K5/18 , H02K5/06 , F16H57/02
Abstract: A wiper motor has: a magnet disposed on the yoke and formed with at least four poles; an armature disposed on an inner side of the magnet; a speed reduction mechanism unit having an output shaft for transmitting the rotation of the armature shaft; a gear housing connected to the yoke; a gear housing cover covering an opening of the gear housing; a magnet attached to the output shaft of the speed reduction mechanism unit; an absolute position detecting sensor disposed so as to face the magnet; and a control board having the absolute position detecting sensor attached thereto, the control board being disposed between the gear housing and the gear housing cover, and configured to control the rotation of the armature shaft.
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公开(公告)号：US09979261B2
公开(公告)日：2018-05-22
申请号：US14638502
申请日：2015-03-04
Applicant: Mitsuba Corporation
Inventor： Hiroto Tanaka , Takeshi Kanai , Masaaki Kimura , Koji Tsuchiya
CPC classification number: H02K9/28 , H02K5/148 , H02K5/18 , H02K7/1166 , H02K11/33 , H02K13/006
Abstract: In a brush holder accommodating part 26d of a gear housing 26, paired flat surface parts 26c and paired curved parts 26b are alternately disposed so as to be formed into an elliptical shape, one of the paired flat surface parts is formed with first heat sinks 26i, and two brushes 20 and 20 mounted on a brush holder unit 19 accommodated in the brush holder accommodating part 26d are disposed near the first heat sinks 26i.
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公开(公告)号：US20180083507A1
公开(公告)日：2018-03-22
申请号：US15562245
申请日：2016-04-12
Applicant: Mitsuba Corporation
Inventor： Teppei Tokizaki , Satoshi Tamura , Natsumi Tamura , Hiroto Tanaka
CPC classification number: H02K5/24 , B60S1/26 , F16D65/0006 , F16D2121/24 , F16H1/32 , H02K3/522 , H02K5/225 , H02K7/1004 , H02K7/116 , H02K11/33
Abstract: A motor with a speed reducer includes a motor (4) received in a motor housing (2), a speed reducer (5) received in the motor housing (2) and that is driven by receiving power from a motor shaft of the motor (4) and that reduces rotation of a rotor boss (43) and outputs the reduced rotation, and a drive shaft (7) received in the motor housing (2), connected to an output shaft (58) of the speed reducer (5) via a transmission belt (6) and that drives a driven body, wherein the rotor boss (43) and the output shaft (58) are disposed coaxially, and the output shaft (58) and the drive shaft (7) are disposed parallel in a radial direction.
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公开(公告)号：US20160056686A1
公开(公告)日：2016-02-25
申请号：US14780184
申请日：2014-03-26
Applicant: MITSUBA CORPORATION
Inventor： Takeshi Kanai , Hiroto Tanaka , Tomohiko Annaka , Naoki Kojima , Hirokazu Shoda
CPC classification number: H02K7/116 , B60S1/166 , H02K5/02 , H02K5/16 , H02K5/18 , H02K5/22 , H02K7/1166 , H02K9/22 , H02K11/0073 , H02K11/33 , H02K2213/03
Abstract: A motor case (31) in which a stationary portion (35) is fixed, and a gear case (41) in which a gear mechanism (SD) is accommodated are made of aluminium, most heat generated from the stationary portion (35) at the time of actuation of a brushless wiper motor (20) can be directly dissipated outside from the motor case (31). That is, compared with conventional technique, heat transmitted to the motor case (31) can be efficiently dissipated outside, and the motor case (31) does not reach high temperature. Therefore, as a matter of course, reduction in size and weight can be achieved, suppression of electromagnetic noise can be achieved, and heat-resistance strength can be enhanced. Expensive components capable of resisting high temperatures are not required, and reduction in manufacturing cost can be achieved.
Abstract translation: 其中固定有固定部分（35）的马达壳体（31）和容纳有齿轮机构（SD）的齿轮箱（41）由铝制成，从固定部分（35）在 无刷电动机（20）的致动时间可以直接从电动机壳体（31）散发到外部。 也就是说，与传统技术相比，传递到马达壳体（31）的热量可以有效地散发到外部，并且马达壳体（31）不达到高温。 因此，当然可以实现小型化和轻量化，可以抑制电磁噪声，提高耐热强度。 不需要能够抵抗高温的昂贵的组件，并且可以实现制造成本的降低。
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公开(公告)号：US10594233B2
公开(公告)日：2020-03-17
申请号：US15958095
申请日：2018-04-20
Applicant: Mitsuba Corporation
Inventor： Tomohiko Annaka , Hiroto Tanaka , Naoki Kojima , Toru Furusawa , Tomofumi Kobayashi
Abstract: A brushless motor (18) which supplies currents to coils (U1, U2, V1, V2, W1, and W2) and rotates a rotor (27), the brushless motor comprising a control apparatus (37) which switches and selectively executes: first energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at first timing, and to continue the energization for a first period to control the rotation number of the rotor (27); and second energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at second timing advanced by an electric angle with respect to the first timing, and to continue the energization for a second period longer than the first period to control the rotation number of the rotor (27).
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Patent Agency Ranking
公开(公告)号：US10348164B2
公开(公告)日：2019-07-09
申请号：US15958064
申请日：2018-04-20
Applicant: Mitsuba Corporation
Inventor： Hiroto Tanaka , Takeshi Kanai , Masaaki Kimura , Koji Tsuchiya
Abstract: In a brush holder accommodating part 26d of a gear housing 26, paired flat surface parts 26c and paired curved parts 26b are alternately disposed so as to be formed into an elliptical shape, one of the paired flat surface parts is formed with first heat sinks 26i, and two brushes 20 and 20 mounted on a brush holder unit 19 accommodated in the brush holder accommodating part 26d are disposed near the first heat sinks 26i.
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7.发明申请公开(公告)号：US20180323733A1
公开(公告)日：2018-11-08
申请号：US15958095
申请日：2018-04-20
Applicant: Mitsuba Corporation
Inventor： Tomohiko Annaka , Hiroto Tanaka , Naoki Kojima , Toru Furusawa , Tomofumi Kobayashi
Abstract: A brushless motor (18) which supplies currents to coils (U1, U2, V1, V2, W1, and W2) and rotates a rotor (27), the brushless motor comprising a control apparatus (37) which switches and selectively executes: first energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at first timing, and to continue the energization for a first period to control the rotation number of the rotor (27); and second energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at second timing advanced by an electric angle with respect to the first timing, and to continue the energization for a second period longer than the first period to control the rotation number of the rotor (27).
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公开(公告)号：US09735717B1
公开(公告)日：2017-08-15
申请号：US15490966
申请日：2017-04-19
Applicant: Mitsuba Corporation
Inventor： Masaaki Kimura , Hiroto Tanaka , Tamotsu Iwazaki , Tomohiko Annaka , Naoki Kojima , Junya Kitazawa
CPC classification number: H02P6/153 , B60S1/08 , B60S1/0818 , B60S1/0896 , B60S1/166 , B60S1/26 , H02K7/1166 , H02K11/215 , H02P6/08 , H02P6/16 , H02P6/182 , H02P6/22 , H02P23/009 , H02P2207/05
Abstract: A brushless motor comprises: a stator 21 having armature coils 21a, 21b, and 21c; a rotor 22 which is rotated by a revolving magnetic field; and a switching element 30a, wherein the brushless motor has a rotation number control unit 33 which switches between low-speed and high-speed mode, wherein in the low-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at predetermined energization timing and controls a duty ratio to control the rotation number of the rotor 22, and in the high-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at energization timing advanced from the energization timing for the low-speed mode, thereby performing field weakening control of weakening the revolving magnetic field from that of the low-speed mode to control the rotation number of the rotor 22.
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公开(公告)号：US10367401B2
公开(公告)日：2019-07-30
申请号：US15112537
申请日：2015-03-05
Applicant: MITSUBA CORPORATION
Inventor： Natsumi Tamura , Hiroto Tanaka , Teppei Tokizaki , Satoshi Tamura
IPC: H02K23/00 , H02K23/38 , H02K3/18 , H02K3/28 , H02K1/17 , H02K1/24 , H02K1/26 , H02K3/12 , H02K7/08 , H02K7/10 , H02K13/00 , H02K23/26 , H02K7/116
Abstract: In a 4-pole, 6-slot, 18-segment electric motor, one forward winding coil (91) and two reverse winding coils (92, 93) are wound on each tooth (12). When the forward winding coils are formed of coils corresponding to a U phase, a V phase, and a W phase and the reverse winding coils are formed of coils corresponding to a “−U” phase, a “−V” phase, and a “−W” phase, the coils, which correspond to a U phase, a “−W” phase, a “−W” phase, a V phase, a “−U” phase, a “−U” phase, a W phase, a “−V” phase, and a “−V” phase, are electrically connected in this order between the adjacent segments. When the number of turns of the coils (91) corresponding to a U phase, a V phase, and a W phase is denoted by T1, the number of turns of the coils (92), which correspond to a “−U” phase, a “−V” phase, and a “−W” phase and first come into sliding contact with a brush, is denoted by T2, and the number of turns of the coils (93), which correspond to a “−U” phase, a “−V” phase, and a “−W” phase and later come into sliding contact with the brush, is denoted by T3, “T2>T1>T3” is satisfied.
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公开(公告)号：US09660559B2
公开(公告)日：2017-05-23
申请号：US14394628
申请日：2013-04-16
Applicant: Mitsuba Corporation
Inventor： Masaaki Kimura , Hiroto Tanaka , Tamotsu Iwazaki , Tomohiko Annaka , Naoki Kojima , Junya Kitazawa
CPC classification number: H02P6/153 , B60S1/08 , B60S1/0818 , B60S1/0896 , B60S1/166 , B60S1/26 , H02K7/1166 , H02K11/215 , H02P6/08 , H02P6/16 , H02P6/182 , H02P6/22 , H02P23/009 , H02P2207/05
Abstract: A brushless motor comprises: a stator 21 having armature coils 21a, 21b, and 21c; a rotor 22 which is rotated by a revolving magnetic field; and a switching element 30a, wherein the brushless motor has a rotation number control unit 33 which switches between low-speed and high-speed mode, wherein in the low-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at predetermined energization timing and controls a duty ratio to control the rotation number of the rotor 22, and in the high-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at energization timing advanced from the energization timing for the low-speed mode, thereby performing field weakening control of weakening the revolving magnetic field from that of the low-speed mode to control the rotation number of the rotor 22.
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