公开(公告)号：US3694720A

公开(公告)日：1972-09-26

申请号：US3694720D

申请日：1970-11-13

Applicant: YASKAWA DENKI SEISAKUSHO KK

Inventor： NAKAJIMA KAZUO

IPC: H02P7/06 ,  H02P7/29 ,  H02P7/292 ,  H02P3/04

CPC classification number: H02P7/2913 ,  Y10S388/906 ,  Y10S388/91 ,  Y10S388/915 ,  Y10S388/92

Abstract: A comtrol system is composed of a saturation amplifier delivering a positive or negative saturated voltage depending on the sign of a difference voltage between a command voltage and a negatively fed back speed-representing voltage of the motor to be controlled, a proportional-intergrating circuit (operable in P-I mode) receiving a difference voltage between the output of the saturation amplifier and a negatively fed back voltage representing the actual armature current through the motor as its input, and a power amplifier in the form of a chopper amplifier operated in a shorter repetition period in comparison with the mechanical time constants of the d.c. motor for supplying an output current to the d.c. motor.

公开(公告)号：US3582739A

公开(公告)日：1971-06-01

申请号：US3582739D

申请日：1969-07-03

Applicant: QUICK ROTAN BECKER & NOTZ KG

Inventor： DAAB HEINZ ,  MEIER KARL-HEINZ

IPC: G05D3/12 ,  B23Q15/26 ,  D05B69/24 ,  F16D63/00 ,  F16D71/00 ,  H02P3/04

CPC classification number: B23Q15/26 ,  D05B69/24 ,  F16D63/002 ,  F16D71/00

Abstract: A contact-free synchronizer for presetting two distinct, independently adjustable stopping positions of the work shaft of an electric drive with electromagnetic brake. The stop pulses are obtained by two oppositely magnetized permanent magnets rotating at a common radius but at different angular positions past a stationary Hall generator whose output is fed, via a differential amplifier and flip-flop, to the brake, so that only the signal of one magnet is utilized. To switch the brake to the signal of the other magnet, it is only necessary to reverse the potential of the Hall generator.

公开(公告)号：US3199801A

公开(公告)日：1965-08-10

申请号：US29452663

申请日：1963-07-12

Applicant: AMPEX

Inventor： SVENDSEN GORDON D

IPC: G11B15/43 ,  G11B15/48 ,  H02P3/04

CPC classification number: G11B15/43 ,  G11B15/48 ,  H02P3/04

公开(公告)号：US2330759A

公开(公告)日：1943-09-28

申请号：US39240041

申请日：1941-05-07

Applicant: MAGEE CARPET CO

Inventor： RICHARD TAYLOR

IPC: H02P3/04

CPC classification number: H02P3/04 ,  Y10T307/872

公开(公告)号：US1815857A

公开(公告)日：1931-07-21

申请号：US21672127

申请日：1927-08-31

Applicant: GEN ELECTRIC

Inventor： LIDDIARD HUGH W C

IPC: H02P3/04

CPC classification number: H02P3/04

公开(公告)号：US1577068A

公开(公告)日：1926-03-16

申请号：US70935624

申请日：1924-04-28

Applicant: CUTLERHAMMER MFG CO

Inventor： OBERSCHMIDT FREDERICK H

IPC: H02P3/04

CPC classification number: H02P3/04 ,  Y10T477/373

公开(公告)号：US12055352B2

公开(公告)日：2024-08-06

申请号：US17948609

申请日：2022-09-20

Applicant: Tex Tenn Design and Consulting

Inventor： Brian Alexander Lesniak ,  Thomas K. Best ,  Carl T. Johnson ,  Thomas Ray Hendrix ,  Michael Wayne Sprengel

IPC: H02K7/10 ,  F04D25/08 ,  F04D27/00 ,  F28F27/00 ,  H02P3/04 ,  F16D55/226 ,  F16D65/18 ,  H02P6/08

CPC classification number: F28F27/003 ,  F04D25/08 ,  F04D27/004 ,  H02P3/04 ,  F16D55/226 ,  F16D65/18 ,  H02P6/08

Abstract: A fan brake system for controlling an industrial fan system, the fan brake system including a fan brake having a brake pad movable on the fan brake to selectively engage the fan system. An actuator including a motor can be operable to cause the fan brake to perform a braking procedure on the fan system to resist rotational movement of the fan system. A controller can be communicated with the actuator, the controller operable to selectively cause the actuator and the fan brake to perform the braking procedure, wherein the controller is operable to monitor and control power being supplied to the motor of the actuator during the braking procedure to maintain a torque output of the motor according to a predetermined torque profile during the braking procedure.

公开(公告)号：US20240072691A1

公开(公告)日：2024-02-29

申请号：US18256931

申请日：2021-11-04

Applicant: Continental Automotive Technologies GmbH

Inventor： Jürgen Böhm

IPC: H02P3/04 ,  B60T8/171 ,  B60T8/172 ,  B60T13/74

CPC classification number: H02P3/04 ,  B60T8/171 ,  B60T8/172 ,  B60T13/74 ,  B60T2270/84

Abstract: A method and apparatus for holding a motor vehicle by means of an electrically actuated brake comprises applying the brake until a target force is reached. For holding purposes, a motor torque is reduced by applying a negative preset value for a target angular velocity for a motor torque of an electric actuator of the brake.

公开(公告)号：US20240056003A1

公开(公告)日：2024-02-15

申请号：US18264758

申请日：2022-03-24

Applicant: FANUC CORPORATION

Inventor： Hitoshi ISHIDA

IPC: H02P3/04 ,  F16D65/18

CPC classification number: H02P3/04 ,  F16D65/18 ,  F16D2121/22

Abstract: A brake control device for controlling a brake device of the non-excitation-actuated type includes: a power supply; a brake control unit outputting a brake control signal; an opening/closing unit opening and closing a circuit between the power supply and brake device according to the brake control signal; a state detection unit outputting a state detection signal indicating an electric potential state of a circuit between the opening/closing unit and the brake device; an abnormality detection unit detecting whether an abnormality is absent or present based on a content of the brake control signal and a content of the state detection signal; a brake lock switch connected between input terminals of the brake device to be connected in parallel with the brake device; and a brake lock switch control unit closing the brake lock switch when the abnormality is detected by the abnormality detection unit.

公开(公告)号：US11722076B2

公开(公告)日：2023-08-08

申请号：US17424655

申请日：2020-01-13

Applicant: SEW-EURODRIVE GMBH & CO. KG

Inventor： Timo Hufnagel ,  Hans Jürgen Kollar ,  Christopher Reichert

IPC: H02P3/18 ,  H02P3/04 ,  H02M7/217

CPC classification number: H02P3/18 ,  H02P3/04 ,  H02M7/217

Abstract: In a drive system and method for operating a drive system, in which the drive systems includes an electromagnetically operable brake, an electric motor, e.g., a three-phase motor, and an electronic circuit, the brake has an energizable coil, e.g., a brake coil, the electronic circuit has a rectifier, an upper controllable semiconductor switch, a freewheeling diode, and a varistor, a direct voltage provided by a rectifier is able to be made available by closing or by a pulse-width-modulated actuation of an upper controllable semiconductor switch of the coil, and by opening the upper controllable semiconductor switch, a current driven by the coil in the de-excitation of the coil is freewheeling and/or flowing through the freewheeling diode and the varistor or through a component connected in parallel with the varistor.