公开(公告)号：US4149116A

公开(公告)日：1979-04-10

申请号：US808289

申请日：1977-06-20

Applicant: Hiroshi Minakuchi

Inventor： Hiroshi Minakuchi

IPC: H02P7/288 ,  H02P5/00

CPC classification number: H02P7/2885

Abstract: A motor speed control system detects a rotation speed of a motor, compares a detected output signal with a reference voltage or a reference frequency to produce an error signal, produces a saw-tooth wave signal of an appropriate repetition frequency, compares the error signal with the saw-tooth wave signal to produce a switching signal, and drives a motor by the switching signal to control the speed of the motor. The system includes a first driver circuit for driving the motor by the output signal of a first comparator circuit which produces the error signal, and a second driver circuit for driving the motor by the output signal of a second comparator circuit which produces the switching signal. The motor is normally driven by the second driver circuit for speed control and is driven by the first driver circuit when the motor is started or overloaded or when the second driver circuit is defective.

Abstract translation: 电动机速度控制系统检测电动机的转速，将检测到的输出信号与参考电压或参考频率进行比较以产生误差信号，产生适当重复频率的锯齿波信号，将误差信号与 锯齿波信号产生开关信号，并通过开关信号驱动电机，以控制电机的转速。 该系统包括用于通过产生误差信号的第一比较器电路的输出信号驱动电动机的第一驱动器电路和用于通过产生开关信号的第二比较器电路的输出信号来驱动电动机的第二驱动器电路。 电动机通常由用于速度控制的第二驱动器电路驱动，并且当电动机起动或过载时或者当第二驱动器电路有缺陷时由第一驱动电路驱动。

公开(公告)号：US4114075A

公开(公告)日：1978-09-12

申请号：US818842

申请日：1977-07-25

Applicant: Hiroshi Minakuchi

Inventor： Hiroshi Minakuchi

IPC: H02P7/288 ,  H02P7/29 ,  H02P5/16

CPC classification number: H02P7/2885 ,  H02P7/2913

Abstract: Rotation of a rotary machine, e.g. a dc motor is controlled with higher accuracy by the system comprising a rotation speed detector for generating a signal having a repetition frequency dependent on the rotation speed of the rotary machine, a phase comparator having two input terminals one of which is applied with the output signal of the rotation speed detector, a voltage controlled oscillator applied with the output signal of the phase comparator, a frequency divider applied with the output of the voltage controlled oscillator and supplying the output to the other input terminal of said phase comparator, and a rotation speed controlling circuit having an input terminal applied with the output of the voltage controlled oscillator, i.e. a detection signal with a multiplied frequency.

公开(公告)号：US4028602A

公开(公告)日：1977-06-07

申请号：US594226

申请日：1975-07-09

Applicant: Kazuo Tokuda ,  Masanobu Tsugita ,  Hiroshi Minakuchi

Inventor： Kazuo Tokuda ,  Masanobu Tsugita ,  Hiroshi Minakuchi

IPC: H02P7/06 ,  H02P7/288 ,  H02P5/12

CPC classification number: H02P7/2885

Abstract: An automatic speed control circuit for an electric motor is provided with a d.c. amplifier circuit having an output transistor of npn type. The motor is driven by a control signal supplied from the collector of the output transistor to control the motor speed. The collector of the output transistor is connected to one terminal of the electric motor, while another terminal of the motor and the emitter of the output transistor are respectively coupled to the positive and the negative terminals of a d.c. power source. The control signal supplied from the output transistor to the motor is changed in compliance with any variation of the power source. Therefore, the motor speed is independent of any variation of the power source.

Abstract translation: 用于电动机的自动速度控制电路具有直流电。 具有npn型输出晶体管的放大器电路。 电机由输出晶体管的集电极提供的控制信号驱动，以控制电机转速。 输出晶体管的集电极连接到电动机的一个端子，而电动机的另一个端子和输出晶体管的发射极分别耦合到直流的正极和负极端子。 能量源。 从输出晶体管提供给电动机的控制信号根据电源的任何变化而改变。 因此，电机速度与电源的任何变化无关。

公开(公告)号：US4024445A

公开(公告)日：1977-05-17

申请号：US593269

申请日：1975-07-07

Applicant: Kazuo Tokuda ,  Hiroshi Minakuchi

Inventor： Kazuo Tokuda ,  Hiroshi Minakuchi

IPC: H02P29/00 ,  H02P23/00 ,  H02P27/02 ,  H02P5/16

CPC classification number: H02P23/16 ,  Y10S388/902

Abstract: A circuit for producing an error voltage for a negative feedback loop for automatic control of a motor speed comprises a monostable multivibrator triggered by a feedback signal of a frequency representative of the motor speed for generating a rectangular signal of a predetermined pulse width, a pulse height proportional to a source voltage for the multivibrator, and a duty cycle decided by the frequency. A potentiometer-integrator derives a variable voltage proportional to an average of the rectangular signal voltage. A potential divider for the source voltage derives a reference voltage indicative of a desired motor speed. A comparator derives a difference between the variable and reference voltages as the error voltage.

Abstract translation: 用于产生用于自动控制电动机速度的负反馈回路的误差电压的电路包括由代表电动机速度的频率的反馈信号触发的单稳态多谐振荡器，用于产生预定脉冲宽度的矩形信号，脉冲高度 与多谐振荡器的源极电压成比例，以及由频率决定的占空比。 电位器积分器得到与矩形信号电压平均成比例的可变电压。 源极电压的分压器产生指示所需电机速度的参考电压。 比较器将可变参考电压与参考电压之差作为误差电压。