Motor control apparatus
    3.
    发明授权
    Motor control apparatus 失效
    电机控制装置

    公开(公告)号:US4518901A

    公开(公告)日:1985-05-21

    申请号:US454028

    申请日:1982-12-28

    摘要: A motor control apparatus for driving and controlling a motor, in which a signal frequency proportional to a rotation number of the motor is converted into a d.c. voltage by a frequency/voltage converter so as to drive and control the motor by the d.c. voltage. The apparatus comprises a first, a second, and a third pulse generator for successively producing a first, a second, and a third repetitive pulse, respectively, in response to a signal period proportional to the rotation number of the motor; a constant current source; a first reset circuit driven by the third pulse to reset an output current of the constant current source; a first capacitor connected to the first reset circuit in parallel with the first reset circuit and charged by the output current of the constant current source; a sampling circuit driven by the second pulse to derive a saw tooth wave signal appearing across the first capacitor; a second reset circuit driven by the first pulse; a second capacitor connected to the second reset circuit in parallel therewith for charging the saw tooth wave signal through the sampling circuit; and a circuit for changing a pulse width of at least one of the first, second and third pulses substantially in accordance with the output current of the constant current source.

    摘要翻译: 用于驱动和控制电动机的电动机控制装置,其中与电动机的转数成正比的信号频率被转换成直流电动机。 电压由频率/电压转换器驱动和控制电机直流。 电压。 该装置包括第一,第二和第三脉冲发生器,用于响应于与电动机的转数成正比的信号周期分别连续产生第一,第二和第三重复脉冲; 恒流源; 由所述第三脉冲驱动的用于复位所述恒流源的输出电流的第一复位电路; 连接到与第一复位电路并联的第一复位电路并由恒流源的输出电流充电的第一电容器; 由第二脉冲驱动的采样电路,以导出出现在第一电容器两端的锯齿波信号; 由第一脉冲驱动的第二复位电路; 与第二复位电路并联连接的第二电容器,用于通过采样电路对锯齿波信号充电; 以及基本上根据恒流源的输出电流改变第一,第二和第三脉冲中的至少一个的脉冲宽度的电路。

    Signal voltage dividing circuit
    4.
    发明授权
    Signal voltage dividing circuit 失效
    信号分压电路

    公开(公告)号:US4460953A

    公开(公告)日:1984-07-17

    申请号:US375585

    申请日:1982-05-06

    IPC分类号: H03H19/00 H02M3/06

    CPC分类号: H03H19/004

    摘要: A signal voltage dividing circuit in which two switched capacitors each including an input terminal, an output terminal and a capacitor connected selectively to the input terminal or the output terminal are connected in series and driven in opposite phase with each other. A holding capacitor is connected between the junction of the two switched capacitors and a reference potential. An input signal is supplied across the two switched capacitors to produce a divided output signal from the junction of the two switched capacitors.

    摘要翻译: 一种信号分压电路,其中包括输入端子,输出端子和选择性地连接到输入端子或输出端子的电容器的两个开关电容器串联连接并且彼此相反地驱动。 保持电容器连接在两个开关电容器的结和参考电位之间。 在两个开关电容器之间提供输入信号,以产生来自两个开关电容器的结的分压输出信号。

    DC/DC CONVERTER
    5.
    发明申请
    DC/DC CONVERTER 有权
    DC / DC转换器

    公开(公告)号:US20090201003A1

    公开(公告)日:2009-08-13

    申请号:US12306612

    申请日:2007-06-11

    IPC分类号: G05F1/10

    CPC分类号: H02M3/1582

    摘要: A conventional DC/DC converter with both a step-up function and a step-down function has a drawback that its output voltage will be discontinuous when its operations are switched.An error signal, which is representative of a difference between a target voltage and a present voltage, is inputted to both a step-down switching control circuit and a step-up switching control circuit. When the difference between the target voltage and the present voltage is below a predetermined value, the switchings of the step-down and step-up converters by the step-down and step-up switching control circuits, respectively, are caused to concurrently run in a time division manner.

    摘要翻译: 具有升压功能和降压功能的常规DC / DC转换器具有缺点,即当其操作切换时,其输出电压将不连续。 代表目标电压和当前电压之间的差异的误差信号被输入到降压开关控制电路和升压开关控制电路。 当目标电压和当前电压之间的差低于预定值时,通过降压和升压开关控制电路分别对降压和升压转换器的切换同时运行 时间划分的方式。

    Video printer having data are stored in main and sub memories are read
out in synchronism thereby generating a synthesized picture data
    6.
    发明授权
    Video printer having data are stored in main and sub memories are read out in synchronism thereby generating a synthesized picture data 失效
    具有数据的视频打印机被存储在主存储器和副存储器中被同步地读出,从而生成合成图像数据

    公开(公告)号:US5028993A

    公开(公告)日:1991-07-02

    申请号:US338298

    申请日:1989-04-14

    摘要: A video printer comprises a main memory unit for storing data of a first picture, a sub-memory for storing data for an overlay region to be overlaid on the first picture and also indicative of a second picture to be displayed in the overlay region, a memory data processing unit for generating a synthesized picture by selectively controlling the picture data for the overlay region on the basis of the data stored in the sub-memory, a system control circuit for controlling the data storage in the main memory unit, the data storage in the sub-memory circuit and operation of the memory data processing circuit, and a print circuit for producing a hard copy on the basis of the output of the memory data processing circuit.

    摘要翻译: 视频打印机包括用于存储第一图像的数据的主存储器单元,用于存储要重叠在第一图像上的重叠区域的数据的子存储器,还指示要在覆盖区域中显示的第二图像; 存储器数据处理单元,用于通过基于存储在子存储器中的数据选择性地控制覆盖区域的图像数据来生成合成图像;系统控制电路,用于控制主存储单元中的数据存储,数据存储 在子存储器电路中和存储器数据处理电路的操作,以及用于根据存储器数据处理电路的输出产生硬拷贝的打印电路。

    Apparatus for driving brushless motor
    7.
    发明授权
    Apparatus for driving brushless motor 失效
    无刷电机驱动装置

    公开(公告)号:US4651067A

    公开(公告)日:1987-03-17

    申请号:US703906

    申请日:1985-02-21

    IPC分类号: H02P6/10 H02P6/02

    CPC分类号: H02P6/10

    摘要: An apparatus for driving a brushless motor, in which a ripple appearing in the rotation torque of the motor is cancelled by driving the motor with a signal current whose phase is opposite to that of and which has a waveform symmetrical with that of the torque ripple waveform, so that the motor can rotate accurately without any speed variation. In order to obtain such a signal current waveform, counter-electromotive forces induced in the stator coils of the motor are detected, and the level of the signal indicative of the detected counter-electromotive forces is controlled depending on the load and rotation speed of the motor to provide a control signal for controlling the motor drive current.

    摘要翻译: 一种用于驱动无刷电动机的装置,其中通过用相位相反的信号电流驱动电动机来消除电动机的旋转转矩中出现的波动,并且其具有与转矩脉动波形对称的波形 ,使得电机可以精确地旋转而没有任何速度变化。 为了获得这样的信号电流波形,检测在电动机的定子线圈中感应的反电动势,并且根据负载和转速来控制表示检测到的反电动势的信号的电平 电机提供用于控制电机驱动电流的控制信号。

    Bipolar transistor circuit with FET constant current source
    8.
    发明授权
    Bipolar transistor circuit with FET constant current source 失效
    具有FET恒流源的双极晶体管电路

    公开(公告)号:US4590438A

    公开(公告)日:1986-05-20

    申请号:US499246

    申请日:1983-05-31

    IPC分类号: H03F3/345 H03F3/45 H03F3/16

    CPC分类号: H03F3/45085 H03F3/345

    摘要: A transistor circuit is used as a signal amplifier which has little possibility of oscillation in an IC. The transistor circuit includes a cascade connection of differential amplifiers. Each of the amplifiers comprises a differential pair of bipolar transistors and an enhancement-type MOSFET as a constant current source. The MOSFET of each amplifier is connected in the common source mode, and the drain is connected to the emitters of the differential pair of bipolar transistors. The sources of all the MOSFETs are connected to a common ground-line.

    摘要翻译: 晶体管电路被用作在IC中几乎没有振荡的信号放大器。 晶体管电路包括差分放大器的级联连接。 每个放大器包括双极晶体管的差分对和作为恒流源的增强型MOSFET。 每个放大器的MOSFET以公共源模式连接,漏极连接到差分双极晶体管的发射极。 所有MOSFET的源极连接到公共地线。

    Power supply for plural brushless DC motors
    9.
    发明授权
    Power supply for plural brushless DC motors 失效
    多个无刷直流电机的电源

    公开(公告)号:US4503369A

    公开(公告)日:1985-03-05

    申请号:US506896

    申请日:1983-06-22

    CPC分类号: H02P5/68 H02P5/60 H02P6/04

    摘要: A power supply in which a single variable voltage supply device is used as a power source for a plurality of motors which are simultaneously or successively rotated, in which each motor is subjected to constant current driving by a current control device connected to the motor, and in which the variable voltage supply device is controlled so as to produce a voltage which is the sum of the highest one of the voltages required for driving the motors and necessary and minimum voltage with which all the current control devices are operable.

    摘要翻译: 一种电源,其中单个可变电压供应装置用作同时或连续旋转的多个电动机的电源,其中每个电动机通过连接到电动机的电流控制装置进行恒定电流驱动;以及 其中可变电压供应装置被控制以产生作为驱动电动机所需的最高电压之和的电压和所有电流控制装置可操作的必要和最小电压的电压。