公开(公告)号：US4647828A

公开(公告)日：1987-03-03

申请号：US735299

申请日：1985-05-17

申请人： Shigeaki Wachi

发明人： Shigeaki Wachi

IPC分类号： G05D13/62 ,  G11B19/24 ,  G11B19/28 ,  H02P29/00 ,  G05B19/29

CPC分类号： G11B19/24

摘要： A servo system for controlling a motor rotation to rotate a disc having thereon information modulated in run length limited code is disclosed, which includes a circuit for counting the number of pulses of the maximum transition interval in the information reproduced from the disc, a loop for controlling the motor rotation at a constant linear velocity in response to the output of the counting circuit, a phase comparator for digitally phase-comparing a phase information signal of the signals reproduced from the disc with a reference signal having a frequency N times that of the phase information signal at every N times and a loop for controlling the phase of the motor through the output of the phase comparator.

摘要翻译： 公开了一种用于控制电机旋转以旋转其上具有以游程长度限制代码调制的信息的盘的伺服系统，其包括用于对从盘再现的信息中的最大转换间隔的脉冲数进行计数的电路， 响应于计数电路的输出以恒定的线速度控制电动机旋转;相位比较器，用于将从盘再现的信号的相位信息信号与频率为N倍的频率的参考信号进行数字相位比较 相位信息信号，并且通过相位比较器的输出控制电动机的相位。

公开(公告)号：US4126891A

公开(公告)日：1978-11-21

申请号：US751641

申请日：1976-12-17

申请人： Tadao Suzuki ,  Shigeaki Wachi

发明人： Tadao Suzuki ,  Shigeaki Wachi

IPC分类号： G05F1/56 ,  H01J23/16 ,  H02M3/155 ,  H02M3/156 ,  H02M3/28 ,  H02M3/338 ,  H02M7/217

CPC分类号： H01J23/165 ,  H02M3/156 ,  H02M3/3387

摘要： A switching regulator includes a chopper circuit and a DC-DC converter. A switching signal for use with the chopper circuit is derived from an inverter portion of the DC-DC converter so as not to use an external pulse oscillator. A DC voltage feeback circuit is provided from the output of the DC-DC converter to the chopper circuit so as to stabilize the DC output signal of the DC-DC converter.

摘要翻译： 开关调节器包括斩波电路和DC-DC转换器。 与斩波电路一起使用的开关信号从DC-DC转换器的反相器部分导出，以便不使用外部脉冲振荡器。 从DC-DC转换器的输出到斩波电路提供直流电压回馈电路，以稳定DC-DC转换器的直流输出信号。

公开(公告)号：US4091434A

公开(公告)日：1978-05-23

申请号：US731766

申请日：1976-10-12

申请人： Tadao Suzuki ,  Shigeaki Wachi

发明人： Tadao Suzuki ,  Shigeaki Wachi

IPC分类号： G05F1/10 ,  G05F1/56 ,  H02H3/08 ,  H02H7/12 ,  H02H9/00 ,  H02H11/00 ,  H02M3/00 ,  H02M3/28 ,  H03F1/52 ,  H02H7/10

CPC分类号： H03F1/52 ,  H02H11/006 ,  H02H3/08 ,  H02H7/12 ,  H02H9/005 ,  H02M3/00

摘要： A surge current protection circuit includes an input terminal supplied with a rectified alternating voltage, an output terminal to be connected to a load, and a semiconductor controlled rectifier having its anode and cathode electrodes connected in series between the input and output terminals. The collector and emitter electrodes of a control transistor are connected between the gate and cathode electrodes of the rectifier. The base-emitter voltage is supplied with any sharp transients, and the transistor becomes conductive before the rectifier if the transients are sharp enough and of high enough amplitude. Conduction of the transistor prevents the semiconductor controlled rectifier from conducting surge currents and protects circuits connected in series with the rectifier.

摘要翻译： 浪涌电流保护电路包括提供有整流交流电压的输入端子，要连接到负载的输出端子以及其阳极和阴极电极串联连接在输入和输出端子之间的半导体可控整流器。 控制晶体管的集电极和发射极连接在整流器的栅极和阴极之间。 基极 - 发射极电压提供任何尖锐的瞬变，如果瞬变足够锐利且足够高的幅度，晶体管将在整流器之前导通。 晶体管的导通防止半导体可控整流器传导浪涌电流并保护与整流器串联连接的电路。

公开(公告)号：US4047089A

公开(公告)日：1977-09-06

申请号：US694713

申请日：1976-06-10

申请人： Tadao Suzuki ,  Tadao Yoshida ,  Shigeaki Wachi

发明人： Tadao Suzuki ,  Tadao Yoshida ,  Shigeaki Wachi

IPC分类号： H02M7/537 ,  H02M3/338 ,  H02M5/458 ,  H02M3/335

CPC分类号： H02M5/458 ,  H02M3/3387 ,  Y02B70/1433 ,  Y02B70/145

摘要： A starting circuit for an inverter includes, at least, a control winding provided in connection with a saturable magnetic core of an input transformer of the inverter, a transistor and a capacitor. When a DC voltage source is activated, a discharge current of the capacitor flows through the collector-emitter circuit of the transistor and the control winding so as to start the switching operation of the inverter. A control circuit is provided for detecting a secondary voltage of the inverter so as to cut off the operation of the starting circuit after the inverter starts.

摘要翻译： 用于逆变器的启动电路至少包括与逆变器的输入变压器的可饱和磁芯，晶体管和电容器相连的设置的控制绕组。 当直流电压源被激活时，电容器的放电电流流过晶体管和控制绕组的集电极 - 发射极电路，以开始逆变器的开关操作。 提供控制电路，用于检测逆变器的次级电压，以便在变频器起动之后切断起动电路的动作。

公开(公告)号：US4031454A

公开(公告)日：1977-06-21

申请号：US691827

申请日：1976-06-01

申请人： Tadao Suzuki ,  Tadao Yoshida ,  Shigeaki Wachi

发明人： Tadao Suzuki ,  Tadao Yoshida ,  Shigeaki Wachi

IPC分类号： H02M3/338 ,  H02M7/5383 ,  H02M7/5387 ,  H02M3/335

CPC分类号： H02M3/3387

摘要： A transistor inverter includes a pair of switching transistors each having base, emitter and collector electrodes, each of the collector and emitter circuits of which is connected between a DC voltage source through a primary winding of an output transformer, respectively, the secondary winding of which is connected to a rectifying circuit so as to produce a DC output voltage at its output. The transistor inverter also includes an input transformer with a saturable core and voltage feedback and current feedback circuits. The current feedback circuit has another transformer which controls the amount of current feedback, and the winding ratio of the primary and secondary windings is determined in connection with the current amplification factor of said first and second switching transistors in order to improve a switching speed of the switching transistors.

摘要翻译： 晶体管反相器包括一对开关晶体管，每个开关晶体管具有基极，发射极和集电极，其集电极和发射极各自分别通过输出变压器的初级绕组连接在直流电压源之间，其次级绕组 连接到整流电路，以在其输出端产生直流输出电压。 晶体管反相器还包括具有饱和磁芯和电压反馈和电流反馈电路的输入变压器。 电流反馈电路具有控制电流反馈量的另一个变压器，并且根据所述第一和第二开关晶体管的电流放大系数来确定初级绕组和次级绕组的绕组比，以便提高开关速度 开关晶体管。