公开(公告)号：US3628111A

公开(公告)日：1971-12-14

申请号：US3628111D

申请日：1969-12-03

Applicant: VICTOR COMPANY OF JAPAN

Inventor： GOTO KUNIO

IPC: H02P23/10 ,  H02P5/28

CPC classification number: H02P23/10

Abstract: An electronic control system removes any irregularities in the rotation of an electrical motor by introducing a controlled DC bias component in the armature or field windings of the motor. The DC bias level is selected to produce a magnetic field which adds to or subtracts from the magnetic field produced by alternating current used to drive the motor. This way, the motor may receive an uneven torque which exactly compensates for any irregularity in the motor and causes the motor to run smoothly and evenly.

公开(公告)号：US3569808A

公开(公告)日：1971-03-09

申请号：US3569808D

申请日：1968-07-22

Applicant: VICTOR COMPANY OF JAPAN

Inventor： GOTO KUNIO

IPC: H02P23/00 ,  H02P5/00

CPC classification number: H02P23/186 ,  Y10S388/90 ,  Y10S388/906

Abstract: This invention provides a servo system for controlling a motor driving a rotary magnetic head assembly in a magnetic recording and reproducing apparatus. The motor is driven by an output signal from an oscillator. A first phase comparator produces a first control signal responsive to the phase difference between a signal which is synchronous with the rotation of the motor and a reference signal which is derived from a signal that is to be recorded. A second phase comparator produces a second control signal responsive to the phase difference between the output of the oscillator and the reference signal. The first and second control signals are added to control the oscillating frequency and phase of the oscillator and thereby maintain a proper rotation of the motor.

公开(公告)号：US3663766A

公开(公告)日：1972-05-16

申请号：US3663766D

申请日：1970-07-29

Applicant: VICTOR COMPANY OF JAPAN

Inventor： GOTO KUNIO

IPC: G11B5/008 ,  G11B5/53 ,  G11B15/18 ,  G11B15/467 ,  H04N5/782 ,  H04N5/7826 ,  G11B15/06 ,  G11B15/44 ,  G11B21/06

CPC classification number: G11B5/0086 ,  G11B5/534 ,  G11B15/1808 ,  G11B15/4672 ,  H04N5/782 ,  H04N5/78263

Abstract: In a continuous scanning system, a rotary magnetic head scans a magnetic tape with oblique tracks from a beginning end to a terminating end of the tape. When the magnetic head has reached the end of the tape, the rotating direction of the magnetic head and the travelling direction of the magnetic tape are automatically reversed. The magnetic head again continuously and endlessly scans the tape. The magnetic head thus records or reproduces signals on the magnetic tape, upon the above scanning.

Abstract translation: 在连续扫描系统中，旋转磁头从带的起始端到终端扫描具有斜轨道的磁带。 当磁头到达磁带末端时，磁头的旋转方向和磁带的行进方向自动反转。 磁头再次连续不断扫描磁带。 因此，磁头在上述扫描时记录或再现磁带上的信号。

公开(公告)号：US3500157A

公开(公告)日：1970-03-10

申请号：US3500157D

申请日：1968-03-06

Applicant: VICTOR COMPANY OF JAPAN

Inventor： GOTO KUNIO

IPC: H02P23/00 ,  H02P5/28

CPC classification number: H02P23/24