公开(公告)号：US4734628A

公开(公告)日：1988-03-29

申请号：US936423

申请日：1986-12-01

申请人： Ronald W. Bench ,  Robert W. Peitz

发明人： Ronald W. Bench ,  Robert W. Peitz

IPC分类号： F25B1/00 ,  F04B49/06 ,  F04D27/00 ,  F24F11/02 ,  F25B49/02 ,  G05D23/19 ,  H02P6/06 ,  H02P29/00 ,  H02P5/16 ,  F25D17/00

CPC分类号： H02P6/06 ,  F04B49/065 ,  F25B49/022 ,  G05D23/1913 ,  F04B2201/1201 ,  Y10S388/93 ,  Y10S388/934

摘要： A compressor speed control arrangement with provision for selecting compressor speed in view of changes in room ambient temperature, detecting a feedback signal indicative of compressor speed, calculating actual compressor speed, developing an error signal between selected and actual compressor speeds and modifying compressor speed in view of the developed error signal.

公开(公告)号：US4695779A

公开(公告)日：1987-09-22

申请号：US864717

申请日：1986-05-19

申请人： Kenneth H. Yates

发明人： Kenneth H. Yates

IPC分类号： H02H7/093 ,  H02P1/04

CPC分类号： H02H7/093 ,  Y10S388/921 ,  Y10S388/93

摘要： Method and apparatus for providing an electric motor such as used on an oil well pumping unit with stall protection. The system comprises means for generating a signal representative of motor speed and for establishing at least two stall speed set points corresponding to upper and lower stall speeds of the motor. Upon the motor speed signal reaching the upper speed set point for one time duration or the lower stall speed set point for a second short time duration, a motor control function is generated. The system may be used for motors having a plurality of operating modes. In this case, at least two stall condition suites, comprising at least two upper and lower stall speed set points as described above, are established corresponding to at least two motor modes, e.g., high torque and low torque modes. The motor winding leads are monitored to identify whether the motor is in the high torque or low torque mode and the appropriate stall condition suite selected.

摘要翻译： 用于提供电动马达的方法和装置，例如用于具有失速保护的油井泵送单元。 该系统包括用于产生代表电动机速度的信号并用于建立对应于电动机的上下失速速度的至少两个失速转速设定点的装置。 当电动机速度信号达到一段时间的高速设定点或者第二短时间段内的下限速度设定点时，产生电动机控制功能。 该系统可以用于具有多个操作模式的电动机。 在这种情况下，对应于至少两个电动机模式（例如高转矩和低转矩模式），至少建立两个包括如上所述的至少两个上下失速速度设定点的失速条件套件。 监控电机绕组引线以识别电机是处于高转矩还是低转矩模式，并选择适当的失速条件。

公开(公告)号：US4556830A

公开(公告)日：1985-12-03

申请号：US651945

申请日：1984-09-19

申请人： Charles L. Schwalm ,  Walter A. Hill

发明人： Charles L. Schwalm ,  Walter A. Hill

IPC分类号： H02P29/00 ,  G05B5/00

CPC分类号： H02P7/2985 ,  Y10S388/902 ,  Y10S388/906 ,  Y10S388/922 ,  Y10S388/93

摘要： A speed controller for a mill drive has two control portions. The first control portion has a first speed of response for controlling mill speed during normal operation. The second control portion has a second speed of response, faster than the first speed of response, for controlling mill speed following abrupt changes in load torque. The first control portion has a reference speed input and this is compared with actual motor speed and the result gives a current reference signal. The current reference signal is compared with a signal representing actual current to derive an error signal used to control the supply of power to the motor. The second control portion multiplies the current reference signal with a signal representing flux to provide a signal representing a model of developed torque. This is compared with a signal representing a model of load torque and the difference integrated to provide a signal representing a model of motor speed. This is compared with actual motor speed and the difference integrated to provide the previously referred to model of load torque. The model of load torque signal is differentiated to provide a compensating speed signal. The compensating speed signal is used to adjust the comparison, in the first portion, of reference speed and actual speed.

摘要翻译： 用于碾磨机的速度控制器具有两个控制部分。 第一控制部具有在正常操作期间控制轧机速度的第一响应速度。 第二控制部分具有比第一响应速度快的第二响应速度，用于在负载转矩突然变化之后控制轧机速度。 第一控制部分具有参考速度输入，并将其与实际电动机速度进行比较，并且结果给出当前参考信号。 将当前参考信号与表示实际电流的信号进行比较，以导出用于控制向电动机供电的误差信号。 第二控制部分将当前参考信号与表示通量的信号相乘以提供表示产生的转矩模型的信号。 将其与表示负载转矩模型的信号进行比较，并且积分的差异提供表示电动机速度模型的信号。 这与实际的电动机速度和差异集成进行了比较，提供了前面提到的负载转矩模型。 负载转矩信号的模型是微分的，以提供补偿速度信号。 补偿速度信号用于调整参考速度和实际速度的第一部分的比较。

公开(公告)号：US4268782A

公开(公告)日：1981-05-19

申请号：US940279

申请日：1978-09-07

申请人： Shigeki Kawada ,  Yoshiki Fujioka ,  Mitsuhiko Hirota ,  Naoto Ohta

发明人： Shigeki Kawada ,  Yoshiki Fujioka ,  Mitsuhiko Hirota ,  Naoto Ohta

IPC分类号： H02P3/08 ,  H02P7/06 ,  H02P7/29 ,  H02P7/292

CPC分类号： H02P7/293 ,  Y10S388/902 ,  Y10S388/91 ,  Y10S388/915 ,  Y10S388/93

摘要： A system for controlling DC motors of the type employing permanent magnets as field poles. The firing phase angle of a thyristor is controlled in response to an error signal representative of an error between a commanded motor speed and an actual motor speed. For preventing demagnetization of the permanent magnets due to the armature reaction, the clamp level of the error signal is changed in accordance with the actual motor speed.

摘要翻译： 用于控制使用永磁体作为场极的类型的直流电动机的系统。 响应于表示指令的电动机速度和实际电动机速度之间的误差的误差信号来控制晶闸管的触发相位角。 为了防止由于电枢反应导致的永磁体的退磁，误差信号的钳位电平根据实际的电动机速度而变化。

公开(公告)号：US4247807A

公开(公告)日：1981-01-27

申请号：US9145

申请日：1979-02-05

申请人： James W. A. Wilson

发明人： James W. A. Wilson

IPC分类号： H02P7/298 ,  H02P5/16

CPC分类号： H02P7/298 ,  Y10S388/91 ,  Y10S388/93

摘要： Operation of a separately excited DC motor at maximum efficiency is achieved by continuously varying armature and field current in accordance with an operator-commanded motor torque amplitude signal. Armature current is varied in accordance with its magnitude of deviation from an armature current command signal which is generated in accordance with a predetermined relationship between the operator-commanded torque amplitude signal and field current. Field current is simultaneously varied in accordance with its magnitude of deviation from a field current command signal which is generated in accordance with magnitude of the armature current command signal. Since the motor is thus provided with the optimum field at all times, maximum motor efficiency is achieved irrespective of loading or speed.

摘要翻译： 通过根据操作者指令的电动机转矩幅度信号连续变化电枢和励磁电流，实现最大效率的单独激励的直流电动机的操作。 电枢电流根据其与根据操作者指令的转矩幅度信号和励磁电流之间的预定关系而产生的电枢电流指令信号的偏差大小而变化。 励磁电流根据其与根据电枢电流指令信号的大小产生的励磁电流指令信号的偏差大小同时变化。 由于马达始终处于最佳场地，无论加载或速度如何，都能实现最大的马达效率。

公开(公告)号：US4189666A

公开(公告)日：1980-02-19

申请号：US904984

申请日：1978-05-11

申请人： Yoshio Tetsugu ,  Hiromitsu Nakano ,  Hiroshi Minakuchi ,  Tomio Oyama ,  Isao Yoshida ,  Mitsuharu Ota ,  Kazutsugu Kobayashi

发明人： Yoshio Tetsugu ,  Hiromitsu Nakano ,  Hiroshi Minakuchi ,  Tomio Oyama ,  Isao Yoshida ,  Mitsuharu Ota ,  Kazutsugu Kobayashi

IPC分类号： H02P7/288 ,  H02P5/00

CPC分类号： H02P7/2885 ,  Y10S388/93 ,  Y10S388/934

摘要： A speed control system for a d-c electric motor comprising a three-terminal space control IC to provide a constant voltage source having a negative internal resistance equal in absolute value to the internal resistance of the motor and thereby render the motor rotatable at a constant controlled speed. A resistance element having a positive temperature coefficient is used as an external circuit element for the IC so that rotation speed variations relative to load torque variations will be substantially constant despite variations in the ambient temperature.

摘要翻译： 一种用于直流电动机的速度控制系统，其包括三端子空间控制IC，以提供具有与电动机的内部电阻绝对值相等的负内部电阻的恒定电压源，从而使电动机以恒定的控制速度旋转 。 使用具有正温度系数的电阻元件作为用于IC的外部电路元件，使得相对于负载转矩变化的转速变化将随着环境温度的变化而基本恒定。

公开(公告)号：US3887855A

公开(公告)日：1975-06-03

申请号：US41971873

申请日：1973-11-28

申请人： CLEVELAND MACHINE CONTROLS

发明人： KLIMO ROBERT G

IPC分类号： B66C13/24 ,  H02P7/298 ,  H02P5/16

CPC分类号： H02P7/2985 ,  B66C13/24 ,  Y10S388/93

摘要： A D.C. reversible drive motor is operated by a motor control system to control motor speed in dependence upon an error signal, representing a given relationship between an actual motor speed signal and a desired reference signal. If the motor operates in a regenerative mode and the actual motor speed exceeds that required for the available torque, a speed modifier control circuit operates to effectively modify the speed reference signal. This causes the motor speed to decrease so that the speed-torque relationship is maintained within prescribed limits.

摘要翻译： D.C.可逆驱动电动机由电动机控制系统操作，以根据表示实际电动机速度信号和期望参考信号之间的给定关系的误差信号来控制电动机速度。 如果电动机在再生模式下工作并且实际电动机速度超过可用转矩所需的速度，则速度调节器控制电路操作以有效地修改速度参考信号。 这导致电机速度降低，使得速度 - 转矩关系保持在规定的限度内。

公开(公告)号：US3805136A

公开(公告)日：1974-04-16

申请号：US27729972

申请日：1972-08-02

申请人： WAHL CLIPPER CORP

发明人： MEYER R ,  WAHL J ,  WALTON W

IPC分类号： H02K7/14 ,  H02P7/292 ,  H02P5/16

CPC分类号： H02K7/145 ,  H02P7/293 ,  Y10S388/917 ,  Y10S388/93

摘要： An electric hair clipper of the rotary motor type possessing superior cutting power and having a casing of relatively small transverse dimensions for enhanced visibility of the cutting blades and comfortable handling during use. The size and shape of the drive motor establish the dimensions of the casing, the motor having small transverse dimensions in relation to its power capacity. The motor, which has a permanent magnet field and is energized by direct current, may be single speed, two speed, or continuously variable in speed over a wide range, each version having a stall torque comparable to that of a motor of larger size, or a motor designed for a higher no-load speed. The motor has a power supply energized by commercial alternating current power, the power supply including a rectifying means having an output means providing power to the motor in an amount depending on the mechanical load encountered by the motor. As the motor tends to slow down due to load, more power is supplied. In one form, the output means includes a Zener diode, in another a Zener diode and shunting switch, in yet another a silicon controlled rectifier circuit, and in another a silicon controlled rectifier circuit with an adjusting means. The field structure of the motor includes a permanent magnet means wherein the ratio of field structure length to field structure diameter (L/D) exceeds 1.25 with the field structure diameter less than about 1 1/4 inches, providing a motor of small transverse dimensions. In more detailed aspect, the field structure provides a skewed magnetic field, enhancing smoothness of motor operation, and, due to the reduced size of the motor, the axis of the motor shaft intersects the movable clipper blade adjacent the cutting teeth, permitting use of an inexpensive transmission of the cam type.

摘要翻译： 具有优越切割力的旋转电机类型的电动剪发器具有相对较小的横向尺寸的外壳，用于提高切割刀片的可视性和使用时的舒适操作。 驱动电机的尺寸和形状确定了外壳的尺寸，电机的横向尺寸相对于其电源容量小。 具有永久磁场并通过直流通电的电动机可以是单速，两速或在宽范围内连续变化的速度，每个版本具有与较大尺寸的电动机相当的失速转矩， 或设计用于较高空载速度的电机。 电动机具有由商用交流电源供电的电源，电源包括整流装置，该整流装置具有输出装置，该输出装置以马达所遇到的机械负载的量向马达提供动力。 由于电机由于负载而趋向于减速，所以供电更多。 在一种形式中，输出装置包括另一个齐纳二极管和分流开关中的齐纳二极管，又一个可控硅整流电路，以及另一个具有调节装置的可控硅整流电路。 电动机的磁场结构包括永久磁铁装置，其中场结构长度与磁场结构直径（L / D）的比率超过1.25，场结构直径小于约11/4英寸，提供小横向尺寸的电动机。 在更详细的方面，场结构提供了偏斜磁场，增强了电动机操作的平滑度，并且由于电动机的尺寸减小，电动机轴的轴线与切割齿相邻的可移动的剪刀片相交，允许使用 凸轮类型的廉价传输。

公开(公告)号：US3586947A

公开(公告)日：1971-06-22

申请号：US3586947D

申请日：1969-04-09

申请人： CUTLER HAMMER INC

发明人： ILK RONALD J ,  RUTCHIK WALTER L

IPC分类号： H02P25/14 ,  H02P5/16

CPC分类号： H02P25/145 ,  Y10S388/918 ,  Y10S388/93

摘要： A full-wave adjustable motor speed control system with feedback for automatic regulation of the speed of an AC motor such as a series or universal motor. A bidirectional thyristor triode in series with the motor armature winding is controlled by a firing circuit operated by a ramp and pedestal voltage. The ramp may be set at a fixed value whereas the pedestal is adjusted for desired speed and regulated by a feedback signal. This feedback signal is developed in an amplifying feedback circuit that is adjusted to eliminate unwanted characteristics and to provide a true speed signal proportional to motor counter EMF.

公开(公告)号：US3582743A

公开(公告)日：1971-06-01

申请号：US3582743D

申请日：1969-03-13

申请人： SYCOR INC

发明人： DIAZ GUILLERMO ,  WOOD ROBERT E ,  IRWIN SAMUEL N

IPC分类号： G11B15/46 ,  G11B15/54 ,  G11B15/60 ,  G11B15/32

CPC分类号： G11B15/46 ,  G11B15/54 ,  G11B15/60 ,  Y10S388/907 ,  Y10S388/909 ,  Y10S388/93

摘要： In a tape recorder/reproducer apparatus, particularly where a low-inertia highly responsive drive train is used, tape speed control means including a variable-speed motor for the drive train energized through a closed-loop servosystem in which the actual output speed of the motor is monitored by a sensor and compared to a reference, to closely control the motor speed in accordance with the reference. The reference is provided by a freely supported capstan which senses actual tape speed at the tape head and produces an output which is compared to a predetermined reference representative of the desired tape speed, such that the motor is servo controlled to satisfy a predetermined tape speed function.