-
公开(公告)号：US4153863A
公开(公告)日：1979-05-08
申请号：US789532
申请日：1977-04-20
申请人： John J. Schachte , Geoffrey A. Ross
发明人： John J. Schachte , Geoffrey A. Ross
IPC分类号： G05B19/23 , G05B19/414 , H02P7/292 , G05B5/01
CPC分类号： G05B19/4142 , G05B19/232 , H02P7/293 , G05B2219/34215 , Y10S388/901 , Y10S388/912 , Y10S388/917
摘要： A speed and position controller for a DC motor, having SCR power circuits, has a digital computing device directly connected to the SCR firing circuits for controlling the SCR firing angle. A command signal in the form of a number is applied to the computing device from a tape reader or other command signal generator. An encoder, operatively connected to the shaft of the motor, furnishes a feedback pulse frequency indicative of motor speed to a counter. The computing device periodically samples the number in the counter for speed and position computations. The computed firing angles are compared with maximum firing angles loaded into the computing device to prevent excessive currents which could cause arcing or demagnetization.
摘要翻译： 具有SCR电源电路的DC电机的速度和位置控制器具有直接连接到SCR点火电路的数字计算装置，用于控制SCR触发角。 数字形式的命令信号从带读取器或其他命令信号发生器应用于计算装置。 可操作地连接到电动机的轴的编码器向计数器提供表示电动机速度的反馈脉冲频率。 计算设备周期性地对计数器中的数字进行速度和位置计算。 将计算的触发角与加载到计算装置中的最大触发角进行比较，以防止可能导致电弧或退磁的过大电流。
-
公开(公告)号：US3986088A
公开(公告)日：1976-10-12
申请号：US551146
申请日：1975-02-19
CPC分类号： H02P27/06 , G05B19/237 , G05D3/1445 , H02P27/048 , H02P2207/01 , H02P27/047
摘要： In apparatus for controlling the speed and torque of a multiphase a. c. motor in accordance with digital control signals, a first regulation circuit regulates the frequency of the a. c. electrical signal applied to the motor and another regulation circuit regulates the voltage of the a.c. signal. Both regulation circuits are controlled by digital control signals in a series of discrete steps over a range of control values and the control signals are supplied periodically to the regulation circuits. The speed and torque are controlled in accordance with an algorithm relating speed and torque to the frequency and voltage of the source of electric power which is applied to the motor, calculated by computing apparatus on a periodic basis. In one embodiment the position of the magnetic flux of the stator is controlled directly.
摘要翻译： 在用于控制多相a的速度和扭矩的装置中。 C。 电机根据数字控制信号，第一调节电路调节a的频率。 C。 施加到电动机的电信号和另一个调节电路调节交流电压。 信号。 两个调节电路都是由数字控制信号在一系列控制值范围内的离散步骤中控制的，并且控制信号周期性地供给调节电路。 速度和转矩根据计算机周期性地计算的速度和扭矩与施加到电动机的电力源的频率和电压相关的算法进行控制。 在一个实施例中，直接控制定子的磁通量的位置。
-
公开(公告)号：US4091294A
公开(公告)日：1978-05-23
申请号：US706581
申请日：1976-07-19
CPC分类号： H02P27/06 , G05B19/237 , G05D3/1445 , H02P23/0077 , H02P27/048 , H02P2207/01 , H02P27/047
摘要： In apparatus for controlling the speed and torque of a multiphase a.c. motor in accordance with digital control signals, a first regulation circuit regulates the frequency of the a.c. electrical signal applied to the motor and another regulation circuit regulates the voltage of the a.c. signal. Both regulation circuits are controlled by digital control signals in a series of discrete steps over a range of control values and the control signals are supplied periodically to the regulation circuits. The speed and torque are controlled in accordance with an algorithm relating speed and torque to the frequency and voltage of the source of electric power which is applied to the motor, calculated by computing apparatus on a periodic basis. In one embodiment the position of the magnetic flux of the stator is controlled directly.
摘要翻译： 用于控制多相交流电的速度和转矩的装置 电机根据数字控制信号，第一调节电路调节交流电源的频率。 施加到电动机的电信号和另一个调节电路调节交流电压。 信号。 两个调节电路都是由数字控制信号在一系列控制值范围内的离散步骤中控制的，并且控制信号周期性地供给调节电路。 速度和转矩根据计算机周期性地计算的速度和转矩与施加到电动机的电力源的频率和电压相关的算法进行控制。 在一个实施例中，直接控制定子的磁通量的位置。
-
公开(公告)号：US4065988A
公开(公告)日：1978-01-03
申请号：US730530
申请日：1976-10-07
申请人： Earl R. Lohneis , John J. Schachte
发明人： Earl R. Lohneis , John J. Schachte
CPC分类号： B23Q3/1554 , B23Q7/1431 , Y10T483/16 , Y10T82/2514 , Y10T82/2516
摘要： This invention relates to a greatly simplified workpiece changer mechanism in combination with a simplified tool storage and changing mechanism for a machine tool. To accomplish this, a rotatable work carrying spindle is adapted to support a workpiece for selective rectilinear movement relative to an associated rotary cutting tool, and to support the same workpiece for selective rotational movement relative to a rectilinearly movable cutting tool carried by the same spindle. The work receiving spindle is mounted in spaced apart relationship to a storage support adapted to releasably carry a workpiece for selective interchange with a workpiece carried by the work spindle. To effect a selective interchange of workpieces between the work spindle and the storage support, a work transfer arm is pivotally supported between the work spindle and the work support. At its opposite ends, the work transfer arm is provided with oppositely extending openings respectively adapted to receive work support rings of like size and configuration. The arrangement is such that the transfer arm pivots 90.degree. in one direction for moving the oppositely disposed openings presented thereby into clamping engagement with the workpieces respectively carried by the work spindle and the storage member. Automatic clamping means respectively associated with the work receiving openings are disposed to be actuated into clamped engagement with the workpieces for retaining them in predetermined angularly clamped positions during the interchange. Next, the work spindle and support member are retracted from engagement with the respective work supports, and the transfer arm rotated through another 180.degree. for respectively realigning the work supports in interchanged position with the work spindle and the support member respectively. The latter are moved forward into clamping reengagement with the now interchanged work supports. The transfer arm clamping means are then released and the transfer arm pivotally moved 90.degree. in the opposite direction to return the transfer arm to its central parked position. To accelerate controlled movement of the work transfer arm, a velocity control system is provided in combination with automatic clamping means for retaining work support rings in clamped engagement within the oppositely disposed openings provided in the transfer member.
-
公开(公告)号：US4013176A
公开(公告)日：1977-03-22
申请号：US311851
申请日：1972-12-04
申请人： Earl R. Lohneis , John J. Schachte
发明人： Earl R. Lohneis , John J. Schachte
CPC分类号： B23Q3/1554 , B23Q7/048 , B23Q7/1494 , Y10T82/2516
摘要： This invention relates to a greatly simplified workpiece changer mechanism in combination with a simplified tool storage and changing mechanism for a machine tool. To accomplish this, a rotatable work carrying spindle is adapted to support a workpiece for selective rectilinear movement relative to an associated rotary cutting tool, and to support the same workpiece for selective rotational movement relative to a rectilinearly movable cutting tool carried by the same spindle. The work receiving spindle is mounted in spaced apart relationship to a storage support adapted to releasably carry a workpiece for selective interchange with a workpiece carried by the work spindle. To effect a selective interchange of workpieces between the work spindle and the storage support, a work transfer arm is pivotally supported between the work spindle and the work support. At its opposite ends, the work transfer arm is provided with oppositely extending openings respectively adapted to receive work support rings of like size and configuration. The arrangement is such that the transfer arm pivots 90.degree. in one direction for moving the oppositely disposed openings presented thereby into clamping engagement with the workpieces respectively carried by the work spindle and the storage member. Automatic clamping means respectively associated with the work receiving openings are disposed to be actuated into clamped engagement with the workpieces for retaining them in predetermined angularly clamped positions during the interchange. Next, the work spindle and support member are retracted from engagement with the respective work supports, and the transfer arm rotated through another 180.degree. for respectively realigning the work supports in interchanged position with the work spindle and the support member respectively. The latter are moved forward into clamping reengagement with the now interchanged work supports. The transfer arm clamping means are then released and the transfer arm pivotally moved 90.degree. in the opposite direction to return the transfer arm to its central parked position. To accelerate controlled movement of the work transfer arm, a velocity control system is provided in combination with automatic clamping means for retaining work support rings in clamped engagement within the oppositely disposed openings provided in the transfer member.
-
公开(公告)号：US4028599A
公开(公告)日：1977-06-07
申请号：US551145
申请日：1975-02-19
CPC分类号： H02P27/06 , G05B19/237 , G05D3/1445 , H02P27/048 , H02P2207/01 , H02P27/047
摘要： In apparatus for controlling the speed and torque of a multiphase a.c. motor in accordance with digital control signals, a first regulation circuit regulates the frequency of the a.c. electrical signal applied to the motor and another regulation circuit regulates the voltage of the a.c. signal. Both regulation circuits are controlled by digital control signals in a series of discrete steps over a range of control values and the control signals are supplied periodically to the regulation circuits. The speed and torque are controlled in accordance with an algorithm relating speed and torque to the frequency and voltage of the source of electric power which is applied to the motor, calculated by computing apparatus on a periodic basis. In one embodiment the position of the magnetic flux of the stator is controlled directly.
摘要翻译： 用于控制多相交流电的速度和转矩的装置 电机根据数字控制信号，第一调节电路调节交流电源的频率。 施加到电动机的电信号和另一个调节电路调节交流电压。 信号。 两个调节电路都是由数字控制信号在一系列控制值范围内的离散步骤中控制的，并且控制信号周期性地供给调节电路。 速度和转矩根据计算机周期性地计算的速度和扭矩与施加到电动机的电力源的频率和电压相关的算法进行控制。 在一个实施例中，直接控制定子的磁通量的位置。
-
公开(公告)号：US3986087A
公开(公告)日：1976-10-12
申请号：US551029
申请日：1975-02-19
CPC分类号： H02P27/06 , G05B19/237 , G05D3/1445 , H02P27/048 , H02P2207/01 , H02P27/047
摘要： In apparatus for controlling the speed and torque of a multiphase a.c. motor in accordance with digital control signals, a first regulation circuit regulates the frequency of the a.c. electrical signal applied to the motor and another regulation circuit regulates the voltage of the a.c. signal. Both regulation circuits are controlled by digital control signals in a series of discrete steps over a range of control values and the control signals are supplied periodically to the regulation circuits. The speed and torque are controlled in accordance with an algorithm relating speed and torque to the frequency and voltage of the source of electric power which is applied to the motor, calculated by computing apparatus on a periodic basis. In one embodiment the position of the magnetic flux of the stator is controlled directly.
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.062 秒)
