公开(公告)号：US4319170A

公开(公告)日：1982-03-09

申请号：US141766

申请日：1980-04-21

Applicant: Allan L. Brent

Inventor： Allan L. Brent

IPC: H02P3/12 ,  H02P7/00 ,  H02P3/14 ,  H02K23/66

CPC classification number: H02P3/12 ,  H02P7/05

Abstract: A direct-current motor is energized through a diode in the emitter-base network of a transistor and through the emitter-collector network of another transistor which is held conductive by the driving current but which automatically limits the current flow through the motor. When the circuit is de-energized, a self-braking effect is established by the circuit which is substantially symmetrical for reversing operation of the motor.

Abstract translation: 直流电动机通过晶体管的发射极 - 基极网络中的二极管通过另一个晶体管的发射极 - 集电极网络通过驱动电流保持导通，但会自动限制通过电机的电流。 当电路断电时，通过对电动机的反转操作基本对称的电路建立自制动作用。

公开(公告)号：US4121142A

公开(公告)日：1978-10-17

申请号：US834844

申请日：1977-09-20

Applicant: Alfred Harold Morser ,  Roy Gibson ,  Paul Szekely ,  Bruce Trayton Parker

Inventor： Alfred Harold Morser ,  Roy Gibson ,  Paul Szekely ,  Bruce Trayton Parker

IPC: H02P7/00 ,  H02P5/16

CPC classification number: H02P7/05 ,  Y10S388/907 ,  Y10S388/917

Abstract: The present invention is a DC motor drive circuit in which each end of a center tapped supply transformer is connected through a pair of back-to-back thyristors to corresponding ends of a center tapped choke coil. The motor armature is connected between the two center taps. After each zero crossing of an AC input signal, a ramp signal is generated. The ramp is comprised of two linear segments of different slopes to improve the linearity of the output of the thyristors as the conduction angle approaches the zero crossing point. Comparator circuits are responsive to the ramp signal and a command signal for generating trigger pulses to the thyristors. The comparators are biased so that with no command signal present, the comparators operate the thyristors to produce a small alternating loop current through the transformer and the choke with each half cycle of the AC input signal. This maintains conduction through all the thyristors without dithering the motor armature.

Abstract translation: 本发明是一种直流电动机驱动电路，其中中心抽头电源变压器的每一端通过一对背靠背晶闸管连接到中心抽头扼流线圈的相应端。 电机电枢连接在两个中心抽头之间。 在AC输入信号的每个过零点之后，产生斜坡信号。 斜坡由两个不同斜率的线性段组成，以在导通角接近过零点时改善晶闸管的输出的线性度。 比较器电路响应于斜坡信号和用于产生触发脉冲到晶闸管的命令信号。 比较器是偏置的，因此在没有指令信号的情况下，比较器操作晶闸管，以在交流输入信号的每个半周期通过变压器和扼流圈产生小的交流回路电流。 这保持了所有晶闸管的导通，而不会使电机电枢抖动。

公开(公告)号：US3924171A

公开(公告)日：1975-12-02

申请号：US39517573

申请日：1973-09-07

Applicant: RICOH KK

Inventor： UKAI TAKESHI ,  YAESHIMA MASAO ,  WATANABE KIMIO

IPC: G05D3/12 ,  G03B27/32 ,  G05B11/06 ,  H02P7/00 ,  G05B1/06 ,  G05F1/00

CPC classification number: H02P7/05

Abstract: A control circuit for controlling the rotation of a servo motor comprises a high gain differential amplifier for producing an output corresponding to the difference between a voltage output from a first potentiometer which moves with the servo motor and a voltage output from a second potentiometer which provides a setting for the angle of rotation of the servo motor. The control circuit further includes a high sensitivity switching circuit including programmable unijunction transistors for detecting the output from the differential amplifier to effect rotation of the servo motor in a forward or reverse direction.

Abstract translation: 用于控制伺服电动机的旋转的控制电路包括高增益差分放大器，用于产生对应于从伺服电动机移动的第一电位计输出的电压与从第二电位器输出的电压之间的差的输出， 设定伺服电机的旋转角度。 控制电路还包括高灵敏度开关电路，其包括用于检测来自差分放大器的输出的可编程单结晶体管，以在正向或反向方向上实现伺服电动机的旋转。

公开(公告)号：US3735223A

公开(公告)日：1973-05-22

申请号：US3735223D

申请日：1972-05-17

Applicant: CUTTERS MACHINE CO INC

Inventor： FORT J ,  FREDERICK C

IPC: B65H45/06 ,  B65H23/188 ,  B65H45/103 ,  H02P7/00 ,  B65H29/46

CPC classification number: B65H45/103 ,  H02P7/05

Abstract: An electrically driven and controlled cloth spreading machine including means for controlling the high and low speeds of the machine, and also for selectively controlling and presetting high speeds of the machine in its forward and reverse directions of movement.

Abstract translation: 一种电驱动和可控制的铺布机，包括用于控制机器的高低速的装置，并且还用于选择性地控制和预设机器在其正向和反向运动方向上的高速度。

公开(公告)号：US3378740A

公开(公告)日：1968-04-16

申请号：US36277664

申请日：1964-04-27

Applicant: PHILIPS CORP

Inventor： ROLF CRUEL

IPC: G05D3/10 ,  G05D3/14 ,  H02P7/03 ,  H03J1/00 ,  H03J5/14

CPC classification number: H03J5/14 ,  G05D3/10 ,  G05D3/1409 ,  H02P7/05 ,  H03J1/00

公开(公告)号：US3378699A

公开(公告)日：1968-04-16

申请号：US42723465

申请日：1965-01-22

Applicant: PHILIPS CORP

Inventor： HENDRIK BRUINSMA ANNE ,  MEYER CLUWEN JOHANNES

IPC: H02P7/00 ,  H03F1/52 ,  H03F3/04 ,  H03F3/26

CPC classification number: H03F3/26 ,  H02P7/05 ,  H03F1/52 ,  H03F3/04

公开(公告)号：US3188544A

公开(公告)日：1965-06-08

申请号：US17481062

申请日：1962-02-21

Applicant: SCHWEITZER JR EDMUND O

Inventor： SCHWEITZER JR EDMUND O

IPC: H02P7/00

CPC classification number: H02P7/05

公开(公告)号：US11699965B2

公开(公告)日：2023-07-11

申请号：US17075641

申请日：2020-10-20

Applicant: Global Mixed-mode Technology Inc.

Inventor： Chia-Tai Yang

IPC: H02P7/29 ,  F04D27/00 ,  F04D25/06 ,  H02P7/03

CPC classification number: H02P7/29 ,  F04D25/06 ,  F04D27/00 ,  H02P7/05

Abstract: A fan motor controller comprises a pulse width modulation signal, a switch circuit, a control unit, and a frequency judging unit. The switch circuit is coupled to a fan motor for supplying a driving current to the fan motor. The control unit generates a control signal to the switch circuit, so as to control the switch circuit. The frequency judging unit receives the pulse width modulation signal for generating a judging signal to the control unit. The pulse width modulation signal is configured to adjust a speed of a fan. The pulse width modulation signal has a frequency. Based on the frequency and a judgment rule, the fan motor controller is configured to attain the function of switching between the forward direction and the reverse direction of the fan.

公开(公告)号：US20180367069A1

公开(公告)日：2018-12-20

申请号：US15626554

申请日：2017-06-19

Applicant: David R. Hall ,  Emily Brimhall ,  Austin Carlson ,  Kevin Rees ,  Joe Fox ,  Seth Myer

Inventor： David R. Hall ,  Emily Brimhall ,  Austin Carlson ,  Kevin Rees ,  Joe Fox ,  Seth Myer

IPC: H02P3/12 ,  H02P7/03 ,  H03K17/567

CPC classification number: H02P3/12 ,  H02P7/05 ,  H03K17/567

Abstract: In various example embodiments, a low energy electric motor brake is described comprising one or more electronic switches that connect the input wires to an electric motor together, thus shorting out the motor and braking the motor. The electronic switches are separate from the control system, and provide the braking function. This alleviates the motor controllers and other system control units from providing the braking function to the motor. The electronic switches require minimal to no power in order to maintain the brake to the motor. The control unit may be placed in a low power or sleep mode while the electronic switches maintain the brake.

公开(公告)号：US20180175759A1

公开(公告)日：2018-06-21

申请号：US15837955

申请日：2017-12-11

Applicant: SEIKO INSTRUMENTS INC.

Inventor： Akihiro IINO

IPC: H02P7/03 ,  H02P25/032 ,  H02P3/10 ,  H02P3/12 ,  H02P1/02 ,  H02K7/06

CPC classification number: H02P7/05 ,  H02K7/061 ,  H02P1/028 ,  H02P3/10 ,  H02P3/12 ,  H02P6/30 ,  H02P25/032

Abstract: A control device for the vibration generation device includes the vibration generation device including a stator, and a rotor provided so as to be able to rotate around a predetermined axis with respect to the stator, and having a weight having a gravity center at a position shifted from the predetermined axis, and a control section adapted to control a start-up period maximum voltage value, which is a maximum voltage value of a drive signal to be applied to the vibration generation device in a start-up period, to become larger than a steady operation period voltage value, which is a voltage value of the drive signal to be applied to the vibration generation device in a steady operation period.