公开(公告)号：US4990811A

公开(公告)日：1991-02-05

申请号：US491106

申请日：1990-03-09

申请人： Masashi Nakata ,  Tetsuro Shimmura

发明人： Masashi Nakata ,  Tetsuro Shimmura

IPC分类号： H02K5/14 ,  H01R39/38 ,  H02K13/00 ,  H02K23/00

CPC分类号： H01R39/381 ,  H02K13/10 ,  H02K23/18 ,  H02K5/148

摘要： A brush holding structure for guiding a brush to a commutator is supported in a motor case. The structure includes an insulator plate attached to the motor case. The insulator plate is provided with guide means for guiding the brush in a direction which is inclined to a radial direction of the commutator within a plane including the axis of the commutator. The structure further includes a plate-like spring which has, at both ends, coil portions for winding up. An intermediate part of the plate-like spring presses the brush against the commutator to hold the brush in contact with the commutator without any play.

公开(公告)号：US06888285B2

公开(公告)日：2005-05-03

申请号：US10275878

申请日：2001-05-10

申请人： Toshimoto Ito ,  Toshihiro Tanino ,  Yousuke Natsume ,  Isamu Adachi ,  Tetsuro Shimmura

发明人： Toshimoto Ito ,  Toshihiro Tanino ,  Yousuke Natsume ,  Isamu Adachi ,  Tetsuro Shimmura

IPC分类号： H02K13/10 ,  H02K13/00

CPC分类号： H02K13/10

摘要： An electric rotating machine and a fan motor for vehicle are obtained, wherein variation width of current waveform resulting from occurrence of coils in a short circuit state is narrowed to reduce vibration and noise. A commutator 26 of the fan motor for vehicle comprises twelve segments 24, and a pair of positive/negative brushes are press-contacted to the commutator 26. Among the segments 24, at least one of pairs of segments that the brushes simultaneously contact have mutually different pitches. Therefore, timing when the coil in the short circuit state occurs at an armature and timing when the coil is released from the short circuit state of one brush deviate from those of the other brush temporally. Accordingly, the variation width of current waveform of electric current supplied to the coil connected to the pair of segments 24 narrows at least. As a result, the vibration of the electric rotating machine, variation of rotating torque, and the noise are considerably reduced, and life thereof is thus extended as well.

摘要翻译： 得到电动旋转机械和车辆用风扇电动机，其中由短路状态下的线圈发生而产生的电流波形的变化幅度变窄，以减少振动和噪音。 用于车辆的风扇电动机的换向器26包括十二个部分24，一对正/负电刷被压接在换向器26上。 在片段24中，刷子同时接触的至少一对片段具有相互不同的节距。 因此，当电枢发生短路状态的线圈和线圈从短时间从另一个刷子的短路状态释放时的定时。 因此，供给到与一对片段24连接的线圈的电流的电流波形的变化幅度至少变窄。 结果，旋转电机的振动，旋转扭矩的变化和噪声显着降低，从而延长寿命。

公开(公告)号：US5157311A

公开(公告)日：1992-10-20

申请号：US736591

申请日：1991-07-26

申请人： Takashi Hara ,  Sueo Matsumoto ,  Tetsuro Shimmura ,  Tsutomu Kinoshita

发明人： Takashi Hara ,  Sueo Matsumoto ,  Tetsuro Shimmura ,  Tsutomu Kinoshita

IPC分类号： H02K11/00 ,  H02K21/24 ,  H02K29/08 ,  H02P6/00 ,  H02P6/14 ,  H02P6/16 ,  H02P6/20

CPC分类号： H02P6/20 ,  H02K11/33 ,  H02K21/24 ,  H02K29/08 ,  H02P6/15 ,  H02P6/16 ,  H02P6/26

摘要： A brushless motor includes a rotor having permanent magnets and a coil for rotating the rotor. In the motor, a switching element is connected between the coil and a power source, a magnetic sensor is provided for detecting the position of one of the permanent magnets of the rotor to control the switching operation of the switching element, and a delay circuit is provided for delaying a signal from the magnetic sensor and then applying the delayed signal to the switching element.With this arrangement, the apparent hysteresis width of the magnetic sensor can be broadened and the prior art problem is avoided wherein variations in the hysteresis width of the magnetic sensor results in disabled rotation of the rotor.