-
公开(公告)号：US4914371A
公开(公告)日：1990-04-03
申请号：US939875
申请日：1986-12-09
申请人： Nobuho Shibata , Takashi Dohi , Kenichi Ohara
发明人： Nobuho Shibata , Takashi Dohi , Kenichi Ohara
IPC分类号： H02P25/02
CPC分类号： H02P25/03
摘要： In apparatus for controlling the rotational speed of a synchronous motor arranged to be driven by an inverter having switches for selectively energizing respective windings of the motor, a current detector is provided to an input of the inverter for detecting input current to the inverter to thereby interrupt energization of the switches by using an output of a first timer circuit when the current exceeds a predetermined value, and a second timer circuit is provided for interrupting energization of the switches on switching between respective phases of the motor. An interrupting time duration by the second timer circuit may be varied in accordance with the rotational speed of the motor and by the plugging state thereof.
摘要翻译： 在用于控制由具有用于选择性地激励电动机的各个绕组的开关的逆变器驱动的同步电动机的转速控制装置中，向逆变器的输入端提供电流检测器，用于检测到逆变器的输入电流，从而中断 当电流超过预定值时，通过使用第一定时器电路的输出使开关通电，并且提供第二定时器电路，用于在电动机的各相之间切换时中断开关通电。 通过第二定时器电路的中断持续时间可以根据电动机的转速和其堵塞状态而变化。
-
公开(公告)号：US4692676A
公开(公告)日：1987-09-08
申请号：US798279
申请日：1985-11-04
申请人： Takashi Dohi , Nobuho Shibata , Kenichi Ohara
发明人： Takashi Dohi , Nobuho Shibata , Kenichi Ohara
摘要： The present invention provides a machine driving apparatus which is composed of a brushless motor for switching the energization phase of the stator winding in accordance with the position of a rotor with a permanent magnet being provided in a rotor as a machine driving motor, compares a speed instructing signal to be generated from a speed instructing unit 32 in accordance with the displacement amount of a machine pedal 31 with a speed detecting signal detected by a speed detector 44 to control the rotational speed of a motor 42, also damps in reverse operation the motor 42 with a stop instructing signal to be generated by a position instructing unit 33 in accordance with the operation of the machine pedal 31 and a needle position detecting signal detected by a needle position detector 46 to stop the machine needle in a given position.
摘要翻译： PCT No.PCT / JP85 / 00087 Sec。 371日期：1985年11月4日 102（e）1985年11月4日日期PCT提交1985年2月26日PCT公布。 公开号WO85 / 03958 1985年9月12日，本发明提供一种机器驱动装置，其由无刷电动机构成，该无刷电动机根据转子的位置切换定子绕组的通电相，永久磁铁设置在转子中作为 机器驱动电动机根据速度检测器44检测的速度检测信号，根据机械踏板31的位移量，比较从速度指示部32生成的速度指示信号，以控制电动机42的转速， 还可以根据机械踏板31的操作和由针位置检测器46检测到的针位置检测信号，使马达42反转操作，停止指示信号由位置指示单元33产生，以停止机针 在给定的位置。
-
3.发明授权Sewing machine having a memory for generating a speed signal in response to operating conditions 失效具有用于响应于操作条件产生速度信号的存储器的缝纫机
公开(公告)号：US4516061A
公开(公告)日：1985-05-07
申请号：US386784
申请日：1982-06-07
申请人： Shigeo Neki , Nozomu Shinozaki , Takashi Dohi
发明人： Shigeo Neki , Nozomu Shinozaki , Takashi Dohi
CPC分类号： D05B69/18 , H02P29/0016
摘要： Disclosed is a sewing machine having a tachogenerator for generating pulses at a frequency proportional to the speed of the sewing machine and a position detector for detecting the position of a foot pedal. A sewing condition detector is provided for detecting the operating conditions of the sewing machine in which it is to be subsequently operated and generating therefrom a corresponding condition indicating signal and a manually adjustable binary code generator for generating a speed indicating binary code in response to the condition indicating signal. Further included is a digital memory responsive to the position indicating signal and the speed indicating binary code for generating a speed control digital signal. The pulses generated by the tachogenerator are processed in accordance with the speed control digital signal to control the amount of motive power transmitted from a motor to the sewing machine.
摘要翻译： 公开了一种缝纫机，其具有用于以与缝纫机的速度成比例的频率产生脉冲的测速发电机和用于检测脚踏板的位置的位置检测器。 提供一种缝制条件检测器，用于检测随后操作的缝纫机的操作条件，并从中产生相应的条件指示信号和手动可调二进制码发生器，用于响应于条件产生指示二进制码的速度 指示信号。 进一步包括响应于位置指示信号的数字存储器和指示用于产生速度控制数字信号的二进制代码的速度。 由测速发电机产生的脉冲根据速度控制数字信号进行处理，以控制从电动机传递到缝纫机的动力的量。
-
公开(公告)号：US4499449A
公开(公告)日：1985-02-12
申请号：US386785
申请日：1982-06-07
申请人： Nozomu Shinozaki , Takashi Dohi , Shinji Yamazaki , Shigeo Neki
发明人： Nozomu Shinozaki , Takashi Dohi , Shinji Yamazaki , Shigeo Neki
CPC分类号： D05B69/18
摘要： A speed setting device for an industrial sewing machine comprises a lever pivotally mounted at one end thereof on a stationary wall and adapted to be pivotally moved in response to the foot pedal of the sewing machine. An arm is pivotally mounted at one end to the stationary wall and operatively engaged with the lever so that they rotate in unison about respective pivot points thereof. The pivot point of the second member is between the lever pivot point and the engagement point between the lever and arm. Thereby, the arm is rotated through an angle greater than the angle through which the lever is rotated in response to the angular displacement of the foot pedal. An angular displacement sensor detects the angular displacement of the arm to generate a speed setting signal.
摘要翻译： 一种用于工业缝纫机的速度设定装置，其特征在于，其一端可枢转地安装在固定壁上，并且能够响应于缝纫机的踏板而枢转地移动。 臂在一端可枢转地安装到固定壁上并且可操作地与杠杆接合，使得它们在其各自的枢轴点处一致地旋转。 第二构件的枢转点在杠杆枢转点和杠杆和臂之间的接合点之间。 因此，臂响应于脚踏板的角度位移而旋转大于杆旋转的角度的角度。 角位移传感器检测臂的角位移以产生速度设定信号。
-
公开(公告)号：US4710688A
公开(公告)日：1987-12-01
申请号：US877425
申请日：1986-06-23
申请人： Shigeo Neki , Kenichi Ohara , Nobuho Shibata , Takashi Dohi
发明人： Shigeo Neki , Kenichi Ohara , Nobuho Shibata , Takashi Dohi
CPC分类号： D05B69/18 , Y10S388/912
摘要： In a sewing machine, a variable speed setting device generates a variable reference speed signal which is applied to a controller. A tachogenerator produces speed pulses at a frequency proportional to the speed of a motor which drives a needle armshaft. The speed pulses are counted during the interval between successive ones of low-frequency clock pulses and a first actual speed signal proportional to the speed of rotation of the motor is derived from the count. High-frequency clock pulses are counted during the interval between successive ones of the speed pulses and a second actual speed signal proportional to the speed of rotation of the motor is derived from the count. The first actual speed signal is enabled when the reference speed signal is higher than a predetermined value and the second actual speed signal enabled when the reference speed signal is lower than the predetermined value. The controller responds to the enabled signal by controlling the speed of the motor so that the enabled signal substantially equals the reference speed signal.
摘要翻译： 在缝纫机中，变速设定装置生成适用于控制器的可变基准速度信号。 测速发电机以与驱动针臂的电机的速度成比例的频率产生速度脉冲。 在连续的低频时钟脉冲之间的间隔期间对速度脉冲进行计数，并且从计数导出与电动机的转速成比例的第一实际速度信号。 在连续的速度脉冲之间的间隔期间对高频时钟脉冲进行计数，并且从计数得出与电动机的转速成比例的第二实际速度信号。 当基准速度信号高于预定值时，第一实际速度信号被使能，而当基准速度信号低于预定值时，第二实际速度信号使能。 控制器通过控制电机的速度来响应使能信号，使得使能信号基本上等于参考速度信号。
-
公开(公告)号：US4517909A
公开(公告)日：1985-05-21
申请号：US387433
申请日：1982-06-11
申请人： Shigeo Neki , Nozomu Shinozaki , Takashi Dohi
发明人： Shigeo Neki , Nozomu Shinozaki , Takashi Dohi
CPC分类号： D05B69/18 , H02P29/0016
摘要： A sewing machine comprises a pedal position detector for detecting the position of the manually operated foot pedal of the machine and generating therefrom a pedal position indicating digital signal comprising a set of a predetermined number of binary digits. The sets of binary digits are organized into a plurality of command signals each comprising a plurality of sets of binary digits corresponding to adjacent positions of the pedal for indicating a specified operating condition of the sewing machine. The sewing machine is operated in response to the command signal.
摘要翻译： 一种缝纫机包括一个踏板位置检测器，用于检测机器手动操作的脚踏板的位置，并由此生成指示数字信号的踏板位置，该踏板位置包括一组预定数量的二进制数字。 二进制数字组被组织成多个命令信号，每个命令信号包括对应于踏板的相邻位置的多组二进制数字，用于指示缝纫机的指定操作条件。 缝纫机根据指令信号进行操作。
-
公开(公告)号：US4403563A
公开(公告)日：1983-09-13
申请号：US287075
申请日：1981-07-21
申请人： Nozomu Shinozaki , Shigeo Neki , Takashi Dohi
发明人： Nozomu Shinozaki , Shigeo Neki , Takashi Dohi
CPC分类号： D05B69/26
摘要： An electric sewing machine driving apparatus includes a clutch coil of an electromagnetic clutch for transmitting a driving motor torque to a sewing machine, a brake coil of an electromagnetic brake for braking the sewing machine, a needle position signal generator for generating a signal indicative of a position where a needle of the sewing machine is to stop, a DC power supply for energizing the clutch coil and the brake coil, voltage generating means for generating a DC voltage higher than the supply voltage of the DC power supply and a capacitor disposed to be charged by the voltage generated by the voltage generating means, whereby an electric charge stored in the capacitor discharges through the brake coil in response to the needle position signal from the needle position signal generator, thereby improving the needle positioning accuracy of the sewing machine.
摘要翻译： 一种电动缝纫机驱动装置，其特征在于，包括：电动离合器的离合器线圈，用于将缝纫机的驱动电机转矩传递到所述缝纫机的制动线圈;用于产生指示所述缝纫机的信号的针位置信号发生器; 缝纫机的针停止的位置，用于对离合器线圈和制动线圈通电的直流电源，用于产生高于直流电源的电源电压的直流电压的电压产生装置和设置为 由电压产生装置产生的电压充电，由此存储在电容器中的电荷响应于来自针位置信号发生器的针位置信号而通过制动线圈放电，从而提高缝纫机的针定位精度。
-
公开(公告)号：US4691653A
公开(公告)日：1987-09-08
申请号：US926534
申请日：1986-11-04
申请人： Shigeo Neki , Kenichi Ohara , Nobuho Shibata , Takashi Dohi
发明人： Shigeo Neki , Kenichi Ohara , Nobuho Shibata , Takashi Dohi
CPC分类号： D05B69/22
摘要： In a control device for a sewing machine control apparatus wherein an electric motor generates a reverse torque against a torque due to a load on the sewing machine in abeyance state, to hold a sewing needle in an upper or a lower position, the reverse torque reaches a maximum value by a known feedback system at its turn to a predetermined revolution angle. The control apparatus is devised such that, when it is further turned in excess of the predetermined revolution angle, the reverse torque falls to zero, hence the driving motor remains at the position turned to the predetermined revolution angle.
摘要翻译： 在缝纫机控制装置的控制装置中，电动马达产生相对转矩的逆转矩，由于在垂直状态下的缝纫机上的负荷引起的扭矩，将缝纫针保持在上下位置时，反转扭矩达到 通过已知的反馈系统在一个预定的旋转角度下的最大值。 控制装置被设计为当进一步转动超过预定转角时，反向扭矩下降到零，因此驱动电机保持在转到预定转角的位置。
-
公开(公告)号：US4437061A
公开(公告)日：1984-03-13
申请号：US288514
申请日：1981-07-30
申请人： Nozomu Shinozaki , Shigeo Neki , Takashi Dohi
发明人： Nozomu Shinozaki , Shigeo Neki , Takashi Dohi
摘要： A speed detector comprises a rotary shaft for rotation with a sewing machine, a ring-shaped permanent magnet uniformly magnetized in a direction parallel to the axis of the rotary shaft, at least one ring-shaped, internally toothed ferromagnetic member or stator and an externally toothed ferromagnetic circular member or rotor which is secured to the rotary shaft inside the stator to form a varying air gap between the opposing teeth. The permanent magnet and the two ferromagnetic members are disposed to form a closed loop magnetic circuit in which a ring-shaped coil is disposed. The air gap and hence the reluctance of the magnetic circuit changes periodically with the revolution of the rotary shaft so that a voltage is generated in the coil which varies at a frequency proportional to the operational speed of the sewing machine.
摘要翻译： 速度检测器包括用于与缝纫机一起旋转的旋转轴，在与旋转轴的轴线平行的方向上均匀地磁化的环形永磁体，至少一个环形的内部铁磁构件或定子以及外部 齿形铁磁圆形构件或转子，其固定到定子内部的旋转轴，以在相对的齿之间形成变化的气隙。 永磁体和两个铁磁部件配置成形成环状线圈的闭环磁路。 气隙，因此磁路的磁阻随着旋转轴的转动而周期性地变化，使得线圈中产生以与缝纫机的操作速度成比例的频率变化的电压。
-
公开(公告)号：US4013933A
公开(公告)日：1977-03-22
申请号：US452915
申请日：1974-03-20
申请人： Takashi Dohi , Kenichi Ohara , Iwao Gotoh
发明人： Takashi Dohi , Kenichi Ohara , Iwao Gotoh
摘要： A rotating disc driven in synchronism with the reciprocating movement of the needle of a sewing machine has a plurality of cutaway arc-shaped sections having different arcs to produce a pulse train of frequency related to the motor speed. A photoelectrical device responds to intermittent light the interceptions being caused by the rotating disc. The pulse train comprises pulses of different pulse lengths, each corresponding to the lower and upper dead points of the needle. First and second pulse length detectors are provided to detect sequentially each of the pulse lengths in a controlled manner by the operator manipulation of a treadle so that the motor is decelerated from a preselected speed to a standstill with the needle at its lower or upper dead point.
-
-
-
-
-
-
-
-
-
搜索结果
19 条记录 (耗时 0.011 秒)
