公开(公告)号：JP2003033081A

公开(公告)日：2003-01-31

申请号：JP2001209528

申请日：2001-07-10

Applicant: Kawada Kogyo Kk ,  川田工業株式会社

Inventor： HIRATA MASARU ,  TANABE YASUTADA

IPC: H02P7/29

Abstract: PROBLEM TO BE SOLVED: To realize stabilized motor drive by suppressing generation of a useless current in the coil of a motor.
SOLUTION: The DC motor drive comprises a current sensor 6 connected with a DC motor 5, a circuit 8 for smoothing a feedback signal from the current sensor 6, a circuit 9 for regulating the level of residual between the feedback signal and an input command signal, a circuit 15 generating a high frequency signal T offset to the positive pole side, a circuit 17 for inverting a residual signal, a comparator 10 for comparing the high frequency signal and the residual signal, a comparator 18 for comparing the high frequency signal and the inverted residual signal, and a driver for driving respective FET groups based on pulse signals from the comparators 10 and 18.
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：通过抑制电动机的线圈中的无用电流的产生来实现电动机的稳定。 解决方案：直流电动机驱动器包括与直流电动机5连接的电流传感器6，用于平滑来自电流传感器6的反馈信号的电路8，用于调节反馈信号和输入指令信号之间的残余电平的电路9 ，产生向正极侧偏移的高频信号T的电路15，用于反转残余信号的电路17，用于比较高频信号和残留信号的比较器10，比较器18，用于将高频信号和 反相残留信号和用于根据来自比较器10和18的脉冲信号驱动各个FET组的驱动器。

公开(公告)号：JP2001197794A

公开(公告)日：2001-07-19

申请号：JP2000001527

申请日：2000-01-07

Applicant: KAWADA KOGYO KK

Inventor： TANABE YASUTADA

IPC: B64C27/68 ,  H02K19/26 ,  H02P9/14

Abstract: PROBLEM TO BE SOLVED: To control an electric device on a rotating object from the structure side having a support member without through of a mechanical control mechanism without using a slip ring. SOLUTION: A controller supplies power to a motor operated drive source 4 for driving a flap loaded in a rotor system 1 and electrically controls the operation of the drive source. The controller comprises an armature coil 9 provided around a support shaft 5 of the system 1 and rotating integrally with the shaft 5, a field coil 10 provided at a mast 6 for rotatably supporting the shaft 5 and opposed to the coil 9, a current controller 11 for changing the power supply state to the coil 10, and a drive source controller 12 for supplying power output from the coil 9 by the rotation of the system 1 and the field of the coil 10 and for controlling the operation of the source 4 based on the change state of its output power.

公开(公告)号：JP2001033467A

公开(公告)日：2001-02-09

申请号：JP21070499

申请日：1999-07-26

Applicant: TOYOTA MOTOR CORP ,  KAWADA KOGYO KK

Inventor： UEHARA YASUO ,  TANABE YASUTADA ,  SUZUKI TOSHIAKI

IPC: G01P3/481 ,  G01P3/44 ,  G01P3/46 ,  G01P3/488 ,  G01P3/49

Abstract: PROBLEM TO BE SOLVED: To provide a rotary speed-detecting device for improving a rotary speed detection accuracy even at an extremely low speed region until the device stops operating. SOLUTION: An angular frequency ω is included in amplitude components by the differentiation of an input signal Vw from a sensor. Although the amplitude where the angular frequency ω is included changes due to a plurality of differentiation, time change terms become identical. Since the amplitude of the signal Vw outputted from a rotary speed sensor is nearly a constant, the angular frequency ω in proportional to the rotary speed can be extracted by obtaining the ratio.

公开(公告)号：JPH11296230A

公开(公告)日：1999-10-29

申请号：JP9416998

申请日：1998-04-07

Applicant: KAWADA KOGYO KK

Inventor： TANABE YASUTADA

IPC: G05B11/36 ,  G05B13/02 ,  G05D3/12 ,  H02P29/00 ,  H02P29/40 ,  H02P5/00

Abstract: PROBLEM TO BE SOLVED: To provide a servo actuator controller capable of adjusting the thrust of a position controlling servo actuator at high responsiveness over a wide adjusting range and having high general applicability. SOLUTION: In the case of executing servo control, a motor rotational speed signal Nm and a motor current signal im for an electric motor 3 built in a servo actuator 1 to control the position of a controlled object are fedback to amplifiers 6, 7 in a servo driving circuit 2 to control a motor driving current id to be outputted to the motor 3. Allowing the current position of the controlled object to follow up the target position, a servo amplifier 8 connected to the prestage of the amplifier 6 is capable of amplifying a deviation signal between a position command signal P* and a position signal Pcur outputted from a potentiometer 5. And then, the position of the controlled object is changed in accordance with a gain command signal G.