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公开(公告)号：US4393422A
公开(公告)日：1983-07-12
申请号：US250296
申请日：1981-04-02
IPC分类号： H02P3/00 , G11B15/18 , G11B15/20 , G11B15/467 , G11B15/48 , H02P29/00 , G11B15/52 , G11B19/28
CPC分类号： G11B15/20 , G11B15/467 , G11B15/48
摘要： A device for intermittently driving a magnetic tape has a capstan for driving the magnetic tape, a motor directly connected to the capstan for driving the capstan, a tachometer for detecting the rotating speed of the motor and producing an output, and a speed control having a settable speed controller for setting a desired motor speed and into which the output from the tachometer is fed back for enabling the speed control to sense when the motor is rotating at the desired motor speed. An intermittent drive control is provided for supplying a triggering signal to trigger said settable speed controller to cause the settable speed controller to operate the speed control for accelerating the motor to the desired motor speed and driving it at that speed, the intermittent drive control supplying the triggering signal in response to a speed setting signal and a head switch signal. A detector for detecting a control signal recorded on the magnetic tape while the motor is being driven at the desired speed is connected to the intermittent drive control. The intermittent drive control is further responsive to the detection of the control signal for discontinuing the triggering signal after the passage of a predetermined period of time for causing the settable speed controller to decelerate the driving of the motor from the desired motor speed, whereby the position of the magnetic tape relative to the position of the recorded control signal at the end of the deceleration by the speed control is constant.
摘要翻译： 用于间歇地驱动磁带的装置具有用于驱动磁带的绞盘，直接连接到主导轴用于驱动主导轴的马达，用于检测马达的转速并产生输出的转速计，以及具有 可设定的速度控制器，用于设定所需的电机速度，反馈器的输出反馈到该速度控制器中，以使速度控制能够感测电机何时以所需的电机速度旋转。 提供间歇驱动控制，用于提供触发信号以触发所述可设定速度控制器，以使可设定速度控制器操作用于将电动机加速到期望的电动机速度并以该速度驱动的速度控制，间歇驱动控制提供 响应于速度设置信号和头开关信号的触发信号。 用于检测在以正常速度驱动电动机时记录在磁带上的控制信号的检测器被连接到间歇驱动控制。 间歇驱动控制还响应于在经过预定时间段之后停止触发信号的控制信号的检测，以使可设定速度控制器从所需电机速度减速马达的驱动，由此位置 的磁带相对于通过速度控制的减速结束时记录的控制信号的位置是恒定的。
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2.发明授权
公开(公告)号：US4484235A
公开(公告)日：1984-11-20
申请号：US275027
申请日：1981-06-18
IPC分类号： G11B15/18 , G11B15/473 , H02P23/00 , G11B21/10 , H04N5/76
CPC分类号： G11B15/1875 , G11B15/4731 , H02P23/186 , Y10S388/911 , Y10S388/912
摘要： A phase control circuit for improving the stability after a predictable rotational speed change of a rotating apparatus and a magnetic reproducing apparatus for performing slow motion reproduction by means of intermittent tape transport and yet being free from transverse swings of the reproduced picture comprises a phase shift circuit which shifts the phase of the reference signal, which is produced by dividing a source signal, at a desired rate, to maintain the phase locked at the very moment during which the rotational speed change is changing. The relative speed of the magnetic head rotation is kept constant during the intermittent tape movement under the condition of the phase being locked.
摘要翻译： 用于改善旋转装置的可预测的转速变化之后的稳定性的相位控制电路和用于通过间歇磁带传送执行慢动作再现并且没有再现图像的横向摆动的磁再现装置包括相移电路 其以期望的速率偏移由源信号分压产生的参考信号的相位，以保持相位锁定在转速变化的时刻。 在相位被锁定的状态下，磁头旋转的相对速度在间歇磁带移动期间保持恒定。
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公开(公告)号：US4395682A
公开(公告)日：1983-07-26
申请号：US220722
申请日：1980-12-29
CPC分类号： H03F3/3081 , H02P6/14
摘要： A differential output circuit for generating a bipolar DC current for an armature winding without requiring a bipolar power source. A combination of transistors and resistors are utilized to effectively apply a bipolar driving current. The use of only transistors and resistors in the differential output circuit enables its easy implementation as an integrated circuit.
摘要翻译： 一种差分输出电路，用于在不需要双极电源的情况下产生用于电枢绕组的双极直流电流。 利用晶体管和电阻器的组合来有效地应用双极驱动电流。 差分输出电路中只使用晶体管和电阻，可以方便地实现集成电路。
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公开(公告)号：US4344023A
公开(公告)日：1982-08-10
申请号：US208477
申请日：1980-11-19
CPC分类号： H02P6/28
摘要： A drive system for a brushless dc motor to control the magnitude of the torque of a motor which has permanent magnet rotor and Hall generators. Multipliers determine the magnitude of current to each phase armature winding so as to determine the current sharing rate among the armature windings according to the rotation angle of the rotor, whereby degrading of torque uniformity due to variation of Hall generator characteristics is avoided. Each multiplier multiplies 2 signals, one being the output of the Hall generator, the other being the difference between the torque control input and the fed back signal of total armature current. Also a torque direction input is supplied to each multiplier to determine the direction of the rotational torque.
摘要翻译： 用于无刷直流电动机的驱动系统，用于控制具有永磁转子和霍尔发电机的电动机的转矩大小。 乘法器确定每相电枢绕组的电流的大小，以便根据转子的旋转角度来确定电枢绕组之间的电流分配率，从而避免由于霍尔发电机特性变化引起的转矩均匀性的降低。 每个乘法器乘以2个信号，一个是霍尔发生器的输出，另一个是转矩控制输入和总电枢电流的反馈信号之间的差。 此外，向每个乘数提供扭矩方向输入以确定旋转扭矩的方向。
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公开(公告)号：US4535276A
公开(公告)日：1985-08-13
申请号：US569762
申请日：1984-01-10
申请人： Nobuyoshi Yokobori
发明人： Nobuyoshi Yokobori
摘要： An output circuit to drive a current into a load. Collector voltage of a current controlling transistor is automatically adjusted to maintain h.sub.FE of the transistor constant, whereby saturation of the transistor and excessive power consumption are avoided. A brushless motor using the output circuit. Current detectors detect emitter current and base current of output transistors and h.sub.FE of the transistors are kept constant, whereby excessive torque loss and harmful vibration are avoided. A limiter limits excessive torque control to prevent power transistor saturation. A switching mode power supply adjusts the collector voltage of the transistor in a feedback loop to keep h.sub.FE constant.
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公开(公告)号：US4608524A
公开(公告)日：1986-08-26
申请号：US728801
申请日：1985-04-29
申请人： Nobuyoshi Yokobori
发明人： Nobuyoshi Yokobori
摘要： An output circuit to drive a current into a load. Collector voltage of a current controlling transistor is automatically adjusted to maintain h.sub.FE of the transistor constant, whereby saturation of the transistor and excessive power consumption are avoided. A brushless motor using the output circuit. Current detectors detect emitter current and base current of output transistors and h.sub.FE of the transistors are kept constant, whereby excessive torque loss and harmful vibration are avoided. A limiter limits excessive torque control to prevent power transistor saturation. A switching mode power supply adjusts the collector voltage of the transistor in a feedback loop to keep h.sub.FE constant.
摘要翻译： 用于驱动电流进入负载的输出电路。 自动调整电流控制晶体管的集电极电压，以保持晶体管的hFE恒定，从而避免了晶体管的饱和和过大的功耗。 使用输出电路的无刷电机。 电流检测器检测输出晶体管的发射极电流和基极电流，晶体管的hFE保持恒定，从而避免过大的转矩损失和有害振动。 限幅器限制过大的转矩控制，以防止功率晶体管饱和。 开关模式电源调节反馈回路中晶体管的集电极电压，以保持hFE恒定。
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7.发明授权Combined memory medium, drive apparatus and method therefor and playback apparatus therefor 失效组合记忆媒体，驱动装置及其方法及其播放装置
公开(公告)号：US5132947A
公开(公告)日：1992-07-21
申请号：US318534
申请日：1989-03-03
CPC分类号： G06F3/0601 , G11B23/0305 , G11B23/30 , G11B27/11 , G06F2003/0692 , G11B2220/213 , G11B2220/2545 , G11B2220/657
摘要： A combined memory medium is constructed by an optical disc used as a read-only memory, a cartridge for holding or receiving the optical disc, and a fixed memory which is held in the cartridge. The read or write operation for the fixed memory is carried out by structure different from that used for the optical disc so that the optical disc and the fixed memory constitute an integral memory medium. A combined memory medium drive apparatus includes the combined memory medium, a disc access block for reading out the data on the optical disc, a memory access block for performing reading or writing of data for the fixed memory, and a control block for interpreting an instruction sent from an external device to control the reading of data from the optical disc through the disc access block and the reading or writing of data for the fixed memory through the memory access block, in which the optical disc and the fixed memory are complementarily used. A combined memory medium playback apparatus includes the combined memory medium drive apparatus and a processing block for controlling it to process the data output therefrom, thereby being capable of performing writing. Because the control program is stored in the fixed memory, the drive apparatus and the playback apparatus are able to be operated with the combined memory medium alone, dispensing with the need for another memory medium.
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公开(公告)号：US4695907A
公开(公告)日：1987-09-22
申请号：US671583
申请日：1984-11-15
CPC分类号： G11B5/588
摘要： A rotary head deflection apparatus for allowing magnetic heads to properly scan signal tracks recorded on a magnetic tape, and used for a helical scan system video tape recorder, which is constituted of driving coils wound onto a stator and movable members carrying magnetic heads and magnets, so that the driving coils are energized to enable the magnetic heads to be displaced in the direction of the axis of rotation of the rotary member.
摘要翻译： 一种旋转磁头偏转装置，用于允许磁头适当地扫描记录在磁带上的信号轨道，并用于由缠绕在定子上的驱动线圈和承载磁头和磁体的可移动部件构成的螺旋扫描系统磁带录像机， 使得驱动线圈被通电以使得磁头能够沿着旋转构件的旋转轴线的方向移位。
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