公开(公告)号：US3914672A

公开(公告)日：1975-10-21

申请号：US42057073

申请日：1973-11-30

Applicant: HITACHI LTD

Inventor： KIWAKI HISAKATSU ,  ONODA YOSHIMITSU ,  IBAMOTO MASAHIKO

IPC: H02P7/29 ,  H02M3/137 ,  H02P5/06

CPC classification number: H02M3/137

Abstract: A chopper is connected in series between a d.c. power supply and a d.c. motor for controlling the speed of the d.c. motor. Means for controlling the chopper comprises a magnetic multivibrator and a magnetic phase shifter driven by the multivibrator. This magnetic phase shifter is of a magnetomotive force comparing type and is composed of a bias winding, a control winding, a feedback winding and an output winding wound around a saturable core. The output of the magnetic multivibrator is differentiated to provide a signal for turning on the chopper and the output of the magnetic phase shifter is differentiated to provide a signal for turning off the chopper.

Abstract translation: 斩波器在直流电源之间串联连接。 电源和直流 用于控制直流电机速度的电机 发动机。 用于控制斩波器的装置包括由多谐振荡器驱动的磁性多谐振荡器和磁性移相器。 该磁性移相器是磁动势比较型，由偏置绕组，控制绕组，反馈绕组和围绕可饱和磁芯的输出绕组构成。 磁性多谐振荡器的输出被微分以提供用于接通斩波器的信号，并且磁移相器的输出被微分以提供用于关断斩波器的信号。

公开(公告)号：US3903465A

公开(公告)日：1975-09-02

申请号：US41935273

申请日：1973-11-27

Applicant: HITACHI LTD

Inventor： IBAMOTO MASAHIKO ,  KURIYAMA SIGERU

IPC: H02M1/06 ,  H02M3/135 ,  H02M3/137 ,  H02P7/29 ,  H02P5/16

CPC classification number: H02M3/137 ,  H02M1/06 ,  H02P7/29 ,  Y10S388/902 ,  Y10S388/917 ,  Y10S388/92

Abstract: An improved chopper control system is proposed. In the system, a d.c. current supply to a d.c. motor is controlled through a chopper which is provided with a main thyristor and an auxiliary thyristor for turning off the main thyristor. The chopper allows a main circuit current to flow during a short period when the auxiliary thyristor is rendered conductive. A rectangular wave oscillator and a differential circuit are provided to apply a chopper-off signal to the auxiliary thyristor at regular intervals and a phase shifter is provided to apply a chopper-on signal with a controlled phase to the main thyristor coacting with the rectangular wave oscillator. The application of the chopper-off signal to the chopper is prohibited by a prohibit circuit when an output signal is produced by a constant voltage element for detecting a high voltage across the chopper. By the thus arranged control system, a fine control of the duty cycle of the chopper can be performed.

Abstract translation: 提出了一种改进的斩波控制系统。 在系统中， 目前供应给d.c. 电动机通过斩波器进行控制，该斩波器设有用于关断主晶闸管的主晶闸管和辅助晶闸管。 当辅助晶闸管导通时，斩波器允许主电路电流在短时间内流动。 提供矩形波振荡器和差分电路，以规律的间隔向辅助晶闸管施加斩波信号，并提供移相器以将具有受控相位的斩波信号施加到与矩形波共同作用的主晶闸管 振荡器 当通过用于检测斩波器两端的高电压的恒定电压元件产生输出信号时，禁止电路将斩波信号施加到斩波器。 通过如此布置的控制系统，可以进行斩波器的占空比的精细控制。