公开(公告)号：US4104978A

公开(公告)日：1978-08-08

申请号：US806154

申请日：1977-06-13

Applicant: Tadashi Takahashi ,  Shigeki Morinaga ,  Kuniaki Kubokura

Inventor： Tadashi Takahashi ,  Shigeki Morinaga ,  Kuniaki Kubokura

IPC: D05B69/36 ,  D05B69/22 ,  H02P3/04

CPC classification number: D05B69/22

Abstract: In a protective device for controlling a sewing machine at a predetermined number of revolutions by a motor equipped with a clutch mechanism and a brake mechanism which are electromagnetically actuated, a protective device is constructed comprising a detector to detect substantially the rotation of the driving shaft of the sewing machine, and a detector to detect the voltage of a control circuit with an output from the detectors being compared with a reference value representative of a predetermined driving state for the sewing machine, so that when the output of the detector becomes lower than the reference value, the operation of the control circuit is terminated, whereby safe operation is provided for the apparatus and an operator.

Abstract translation: 在通过具有电磁致动装置的离合器机构和制动机构的电动机以预定转数来控制缝纫机的保护装置中，构成了保护装置，该保护装置包括检测器，用于基本上检测驱动轴的旋转 缝纫机和检测器，用于检测来自检测器的输出的控制电路的电压与代表缝纫机的预定驱动状态的参考值进行比较，使得当检测器的输出变得低于 参考值，终止控制电路的操作，由此为设备和操作者提供安全操作。

公开(公告)号：US5038065A

公开(公告)日：1991-08-06

申请号：US349494

申请日：1989-05-09

Applicant: Jun Matsubayashi ,  Fumio Tajima ,  Kunio Miyashita ,  Kazuaki Takada ,  Kuniaki Kubokura ,  Eiji Toyoda

Inventor： Jun Matsubayashi ,  Fumio Tajima ,  Kunio Miyashita ,  Kazuaki Takada ,  Kuniaki Kubokura ,  Eiji Toyoda

IPC: H02K21/14 ,  H02K29/08

CPC classification number: H02K21/14 ,  H02K29/08

Abstract: A rotor of a permanent magnet type synchronous motor facing a stator having a number of slots comprises a rotor core fixed to a motor shaft and an even number of permanent magnets in a circumferential direction of the rotor core. Projecting portions are formed in the shape of a protruding portion of the rotor core over each permanent magnet. The width (A) of each projecting portion is different from the pitch (B) of the slots of the stator. A position detector for detecting the permanent magnet position of the rotor comprises detectors of the normal rotation and other detectors of the reverse rotation. These detectors are arranged having predetermined phase differences (.alpha., .beta.) to a center line. A pattern generating circuit is provided for switching the conducting position to the stator winding corresponding to the phase differences.

Abstract translation: 面向具有多个槽的定子的永久磁铁式同步电动机的转子包括固定在电动机轴上的转子铁芯和在转子铁芯的圆周方向上的偶数个永久磁铁。 突出部分形成为每个永磁体上的转子芯的突出部分的形状。 每个突出部分的宽度（A）不同于定子的槽的间距（B）。 用于检测转子的永磁体位置的位置检测器包括正转的检测器和反转的其它检测器。 这些检测器被布置成与中心线具有预定的相位差（α，β）。 提供模式产生电路，用于将导通位置切换到对应于相位差的定子绕组。

公开(公告)号：US4040508A

公开(公告)日：1977-08-09

申请号：US648674

申请日：1976-01-13

Applicant: Masayoshi Sunada ,  Kuniaki Kubokura

Inventor： Masayoshi Sunada ,  Kuniaki Kubokura

IPC: H02P29/04 ,  F16D48/06 ,  H02P15/02 ,  H02P29/00

CPC classification number: H02P29/0016

Abstract: A control circuit for controlling the shaft speed of a motor having clutch and brake devices comprises a speed detector for detecting the actual rotating speed of the motor and generating a first pulse signal having a period in inverse proportion to the actual rotating speed, a speed selector for setting the desired-speed of the shaft, a signal generator for generating a second pulse signal having a period in inverse proportion to the desired-speed from the speed selector, a first means for detecting the ratio of the period of the first signal to the period of the second signal, and a second means for controlling the operation of the clutch and brake devices in response to the detected ratio.

Abstract translation: 用于控制具有离合器和制动装置的电动机的轴速度的控制电路包括用于检测电动机的实际转速的速度检测器，并产生具有与实际转速成反比的周期的第一脉冲信号;速度选择器 用于设定所述轴的期望速度的信号发生器，用于产生具有与所述速度选择器的期望速度成反比的周期的第二脉冲信号的信号发生器，用于检测所述第一信号与所述第一信号的周期的比率的第一装置， 第二信号的周期，以及响应于检测到的比率来控制离合器和制动装置的操作的第二装置。