Plural, Diverse Or Diversely Controlled Braking Means Patents (Class 318/370)
  • Patent number: 10454392
    Abstract: A method of performing an emergency stop of a motor is disclosed. The method includes powering a controller with a power supply after an external power source ceases providing power to the motor, controlling the motor to operate in a generator mode, optionally applying power from the motor to the control power supply, and electronically braking the motor while in the generator state. Also disclosed is a motor drive performing the method.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: October 22, 2019
    Assignee: Hubbell Incorporated
    Inventor: Eric Scott Christenson
  • Patent number: 9975433
    Abstract: An electric vehicle controller includes an inverter that drives a motor by receiving power supplied from an overhead line, a brake chopper circuit that includes a switching device and a braking resistor and is connected in parallel with the inverter, a voltage detector that detects a bus voltage applied to DC buses, and a control unit that performs power consumption control of causing the braking resistor to consume regenerative power supplied from the motor and overvoltage suppression control of suppressing the bus voltage from being excessive. The control unit controls the switching device such that a second duty ratio used at the time of performing the overvoltage suppression control is lower than a first duty ratio used at the time of performing the power consumption control.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: May 22, 2018
    Inventors: Hiroshi Fujiwara, Yuri Yamamoto, Yu Hirayama
  • Patent number: 9941687
    Abstract: Methods for operating a wind turbine system are provided. In one embodiment, a method includes adjusting a threshold direct current (DC) bus voltage for a dynamic brake in a wind turbine power converter above a reference DC bus voltage based on at least one system condition. The method further includes gating the dynamic brake on when an experienced DC bus voltage is equal to or greater than the threshold DC bus voltage, and inputting a dynamic brake condition into a controller when the dynamic brake is gated on. The method further includes determining if a grid fault has occurred, reducing power generation of the wind turbine if no grid fault has occurred, and blocking the power converter if a grid fault has occurred. The method further includes gating the dynamic brake off when the experienced DC bus voltage is less than the threshold DC bus voltage.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: April 10, 2018
    Assignee: General Electric Company
    Inventors: Huibin Zhu, Xueqin Wu, Shouzhong Chang, Jie Ding
  • Patent number: 9889990
    Abstract: An electromechanical actuator power drive unit for dynamic braking is provided, comprising an electric motor with a stator, a rotor that rotates with respect to the stator, and windings fixed to the stator. There is a control unit configured to supply a current to the windings. When the control unit is not supplying current to the windings, an electrical device allows current to flow through a parallel current path to the windings. The new current is generated by the interaction of a roller connected with a gear set to the rotor. The roller, and therefore the rotor, is urged in a rotational direction by the translational velocity of a load in contact with the roller. The new current generated by the rotating rotor flows in the opposite direction as the first current supplied by the power supply unit and creates a dynamic braking torque in the electric motor.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: February 13, 2018
    Assignee: Ancra International LLC
    Inventors: Daniel Dimitrov, John Nica, Roy Yamatoku
  • Patent number: 9876442
    Abstract: A single-phase DC/AC inverter has a single-phase inverter bridge with binary switches connected to an RLC low-pass filter. Digital control logic in a control circuit (or in a microcontroller) determines and controls a logic state q determining the position of the switches in the inverter bridge from sensed iL, vC values from the RLC filter. The control logic selects one of multiple possible logic states q based on whether the sensed iL, vC values belongs one of multiple boundary regions of a tracking band in an iL, vC state space.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: January 23, 2018
    Assignee: The Regents of the University of California
    Inventors: Ricardo G. Sanfelice, Jun Chai
  • Patent number: 9461567
    Abstract: The drive control device for a drive system including a vertical carrier machine includes: a drive control device (A) for an electric motor (M1) mainly for regenerative operation; a drive control device (B) for an electric motor (M2) mainly for power operation; and a regenerative power storage capacitor (12) that is connected between a positive terminal (P11) and a negative terminal (N1) of a direct-current output line of a converter part (1) via a third inrush current suppression circuit (11) in which a third resistor (R3) and a switch (SW3) are connected in parallel, wherein the capacitor (12) has an electrostatic capacitance and a direct-current internal resistance to produce a current value with which braking torque required for velocity control of the electric motor (M1) mainly for regenerative operation is generated by a charging current flowing at storage of the regenerative energy generated by the electric motor (M1).
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: October 4, 2016
    Inventor: Katsumi Matsushita
  • Patent number: 9369076
    Abstract: A dynamic braking system for an electric power system includes a switching device coupled to an electrical conductor. The switching device is configured to open and close with a plurality of predetermined frequencies. The dynamic braking system also includes an inductive device coupled to the switching device. The power losses of the inductive device are at least partially a function of the plurality of predetermined frequencies. The dynamic braking system further includes a dynamic braking controller coupled to the switching device. The dynamic braking controller is configured to open and close the switching device with at least one of the predetermined frequencies to dissipate electric power from the electrical conductor at a predetermined rate by regulating the power losses of the inductive device as a function of the predetermined frequencies.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: June 14, 2016
    Assignee: General Electric Company
    Inventors: Yong Xu, Robert Gregory Wagoner, Jun Zhu, Weng Li, Jincheng Huang
  • Patent number: 9346448
    Abstract: A vehicle brake hydraulic pressure control apparatus includes a pressure increasing section, a holding section, and a determination section and wheel speed sensors. The pressure increasing section increases a brake hydraulic pressure by driving a motor. The holding section holds a brake hydraulic pressure. The determination section determines whether or not the motor is malfunctional. The wheel speed sensors detect whether or not a vehicle which is at a halt starts to move. If the wheel speed sensors detect that the vehicle starts to move while the holding section is executing a holding control, the pressure increasing section executes a hydraulic pressure re-increasing control by driving the motor, and the determination section determines whether or not the motor is malfunctional based on a detection result by the wheel speed sensors after the brake hydraulic pressure is started to be increased by the hydraulic pressure re-increasing control.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: May 24, 2016
    Assignee: NISSIN KOGYO CO., LTD
    Inventors: Yutaka Harada, Takashi Kurosaki, Kenichi Taki
  • Patent number: 9190939
    Abstract: A device for managing electric braking power includes a continuous bus, a dissipation branch, a current sensor, a controller, and an electronic charging switch. The bus includes a first pole for connection to a vehicle electric traction machine, a second pole for connection to a battery, and a connection point for connection to the dissipation branch, which includes an electronic dissipation switch connected to a dissipation resistor. The current sensor and the charging switch are positioned on the bus between the connection point and the second pole. The charging switch controls a flow of current over the bus from the first pole to the second pole. When power sent over the bus is greater than a total of power that charging of the battery can absorb and power that the dissipation resistor can dissipate, the controller causes the charging switch to open.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: November 17, 2015
    Inventor: Ivan Modolo
  • Patent number: 9024551
    Abstract: An integrated power converter includes first and second auxiliary switch modules, and one or more braking switch modules. The first auxiliary switch module is mounted at a first location of a laminated bus bar, and connects a first auxiliary lead with a first power layer and a second power layer of the bus bar. The second auxiliary switch module is mounted at a second location of the bus bar, and connects a second auxiliary lead with the first and second power layers. The braking switch modules are mounted at additional locations of the bus bar, adjacent to the first and second locations. Each braking switch module connects a braking lead with one of the power layers of the bus bar, and with a dual diode module or with the other power layer of the bus bar.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: May 5, 2015
    Assignee: General Electric Company
    Inventors: Alvaro Jorge Mari Curbelo, Henry Todd Young, Jason Daniel Kuttenkuler
  • Patent number: 8975838
    Abstract: An electric motor controller includes controller electronics configured to control an electric motor. The electric motor controller also includes a thermoelectric cooler in thermal communication with the controller electronics. The thermoelectric cooler is configured to receive a braking current associated with braking of the electric motor and provide cooling to the controller electronics.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: March 10, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Richard E. Versailles, Robert D. Klapatch, Kerry R. Querns
  • Patent number: 8901861
    Abstract: Thermal management of various components such as electrical energy storage devices (e.g., batteries, super- or ultracapacitors), power converters and/or control circuits, in electrically powered vehicles may employ active temperature adjustment devices (e.g., Peltier devices), which may advantageously be powered using electrical energy generated by the traction electric motor during regenerative braking operation. Temperature adjustment may include cooling or heating one or more components. The adjustment may be based on a variety of factors or conditions, for instance sensed temperature, sensed current draw, sensed voltage, sensed rotational speed.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: December 2, 2014
    Assignee: Gogoro, Inc.
    Inventors: Hok-Sum Horace Luke, Matthew Whiting Taylor
  • Patent number: 8704467
    Abstract: An inverter device provided on a washing machine for controlling a permanent magnet motor being provided with a rotor magnet including a first permanent magnet and a second permanent magnet having a level of coercivity smaller than the first permanent magnet. An excitation current is produced to vary the amount of magnetism of the second permanent magnet to execute a dehydrate operation with a magnetic flux of the rotor magnet reduced and to execute an operation being specified to operate at a lower maximum rotation count compared to the dehydrate operation with the magnetic flux of the rotor magnet increased. When the amount of magnetism of the second permanent magnet is varied while rotation of the permanent magnet motor is stopped, a phase of the excitation current for varying the amount of magnetism is switched depending on a rotation stop position of the rotor.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: April 22, 2014
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Consumer Electronics Holdings Corporation, Toshiba Home Appliances
    Inventors: Tsuyoshi Hosoito, Isamu Nitta
  • Patent number: 8686670
    Abstract: A system and method for determining the holding torque of a brake in a material handling system is disclosed. The material handling system may include a bridge, a trolley, and a hoist, each driven along a different axis by a motor. A brake is operatively coupled to the motor to prevent unwanted motion of the motor. A motor controller is coupled to each motor which controls operation of the motor and its corresponding brake. The motor controller generates a torque command to the motor while keeping the brake set. The initial torque command is less than the holding torque of the brake. The torque command is incremented until motion is detected on the motor. The torque value when motion is detected is stored in the motor controller and displayed to an operator.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: April 1, 2014
    Assignee: Magnetek, Inc.
    Inventors: Kurtis L. Verheyen, Aaron Kureck
  • Publication number: 20140001987
    Abstract: A motor drive device (20) includes a circuit (31) (e.g., an inverter) with a connection configuration that is switchable among: (a) a drive operative connection configuration that allows a motor unit (6) to be driven with power supplied from a battery unit; (b) a regenerative braking connection configuration; and (c) a short-circuit connection configuration that causes motor coils of the motor unit (6) to short-circuit to create a braking force. The motor drive device (20) also includes a short-circuit current controller (26) configured to control a short-circuit current that flows when the connection configuration of the circuit is (c) the short-circuit connection configuration. The motor drive device (20) also includes a regenerative braking and short-circuit braking switching controller (25) that may cause switching from (b) the regenerative braking connection configuration to (c) the short-circuit connection configuration, or vise versa.
    Type: Application
    Filed: March 12, 2012
    Publication date: January 2, 2014
    Inventor: Koichi Okada
  • Patent number: 8610384
    Abstract: A device converts electrical energy into heat in the field of drive voltage technology and/or high voltage technology. The device contains a brake resistance and at least one controllable brake power semiconductor for controlling the conversion, enabling a rapid and economical transformation of effective power into heat as required. To this end, the brake resistance contains a plurality of individual brake resistances that are each part of a bipolar submodule. The submodules are connected in series, form a submodule series connection, and at least partially contain an energy accumulator respectively connected in parallel to an associated individual brake resistance and a controllable brake power semiconductor, which allows the current flow over the respectively associated individual brake resistance in a brake position, and interrupts the current flow over the brake resistance in a normal operating position.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: December 17, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Mike Dommaschk, Ingo Euler, Herbert Gambach, Joerg Lang, Quoc-Buu Tu, Carsten Wittstock, Klaus Wurflinger, Andreas Zenkner
  • Patent number: 8581531
    Abstract: An electric power converting apparatus includes a switching circuit, a PWM controller, conducting PWM all phase shut-off and zero-vector outputting, a unit configured to detect or estimate current flowing through a motor, a unit configured to conduct a DC braking, and a current comparator configured to compare between a DC braking time maximum current setup value, and a current value obtained by the unit configured to detect or estimate current. The PWM all phase shut-off and zero-vector outputting are conducted, repetitively, by the PWM controller, if the current comparator determines that a current value, which is obtained by the unit configured to detect or estimate current, exceeds the DC braking time maximum current setup value, when conducting the DC braking to obtain a braking power by running current through the motor.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: November 12, 2013
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Yusaku Onuma, Yusuke Arao
  • Patent number: 8441223
    Abstract: Disclosed herein is a torque control method for a high-speed Switched Reluctance Motor (SRM), which controls a torque in the high-speed operation of a 2-phase SRM. In the torque control method for a high-speed SRM, a positive torque (T*mA) of an active phase (A phase) of the two phases of the SRM is compensated for based on a negative torque attributable to an inactive phase (B phase) of two phases during a compensation control enable interval (ENA) ranging from a time point at which the active phase (A phase) is turned on to a time point at which tail current of the inactive phase (B phase) remains. Accordingly, the present invention can remarkably reduce a torque ripple occurring in high-speed operation mode in consideration of the influence of a negative torque attributable to tail current.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: May 14, 2013
    Assignee: Kyungsung University Office of Industry-Academy Cooperation
    Inventors: Jin-Woo Ahn, Dong-Hee Lee
  • Patent number: 8427086
    Abstract: An electric drive system comprises a generator, a traction motor, a brake resistor, a bus, and a control unit. The generator, the traction motor, and the brake resistor are coupled electrically to the bus. The control unit is configured to determine a pulse-width-modulation duty cycle for the brake resistor (“brake duty”) and control operation of the brake resistor according to the brake duty, wherein the brake duty can be a value intermediate of constant OFF and constant ON. A method of operating the electric drive system is also disclosed.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: April 23, 2013
    Assignee: Deere & Company
    Inventor: Zimin W. Vilar
  • Patent number: 8362722
    Abstract: A power converter device for achieving a stable braking operation, preventing excessive current to flow therein, when conducting DC braking on a permanent synchronous motor, comprises: a switching circuit for converting DC to AC; a PWM controller means, for controlling ON or OFF of said switching circuit; a means for detecting or estimating current flowing through a permanent magnet synchronous motor; and a means for executing DC braking of said permanent magnet synchronous motor, wherein there are provided a DC braking maximum current setup value, which is determined from an outside or is determined in advance within an inside, and a PWM all-phases cutoff function and a zero vector output function within said PWM controller means, within said PWM controller means, whereby the PWM all-phases cutoff and the zero vector output are repeated within said PWM controller means, if a current value, which is obtained by said means for detecting or estimating the current, exceeds said DC braking maximum current setup v
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: January 29, 2013
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Yusaku Onuma, Yusuke Arao
  • Patent number: 8305018
    Abstract: If it is determined that excess power is generated based on overcharge information of a power storage device, a controller starts an operation of consuming the excess power by an excessive power consuming circuit. The controller counts elapsed time from the time point when the power consuming operation started, and if the counted elapsed time exceeds a minimum on-time set in advance, switches the excessive power consuming circuit from active to inactive state. The minimum on-time is set based on a pattern that is expected to cause generation of excessive regenerative power from an AC electric motor because of abrupt change in running status of an electric powered vehicle mounting a motor drive system.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: November 6, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masaki Okamura
  • Patent number: 8299735
    Abstract: A fan system including a motor with a coil, a storage unit, a driver, and a buffer circuit is provided. The coil module has a first connection terminal and a second connection terminal. The storage unit electrically couples with a voltage source, stores electrical energy when the voltage source is available, and releases the stored electrical energy to carry out a brake operation when the voltage source is unavailable. The driver electrically couples with the first and second connection terminals of the coil module to control a direction of an inductor current passing through the coil module. The buffer circuit electrically couples with the coil module. In the brake operation, the buffer circuit operates to form a transient potential between the first and second connection terminals of the coil module and to consume electrical energy of the inductor current, for gradually stopping the motor in a buffering time period.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: October 30, 2012
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventors: Alex Horng, Tung-An Chen, Cheng-Nan Tsai, Kun-Tien Wu, Kuan-Yin Hou
  • Patent number: 8283879
    Abstract: A braking controller of a three-phase permanent magnetic brushless DC motor for directly driving a screw pump includes a detection circuit for detecting power supply states of the three-phase permanent magnetic brushless DC motor and a braking circuit for controlling the braking startup according to the power supply states of the three-phase permanent magnetic brushless DC motor. When the motor is supplied with power, the braking circuit is cut off. When the motor is not supplied with power and the screw pump drives the motor to reverse, the braking circuit starts up.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: October 9, 2012
    Assignee: Millennium Oilflow systems & Technology Inc.
    Inventors: Jun Liu, Yongjian Tang, Hengli Cong
  • Patent number: 8094435
    Abstract: A power drive stack system comprises a series of power electronic modules, each one of the modules containing power components and module contacts electrically and mechanically aligned for building a portion of a complete AC/DC drive stack. The modules utilize a common set of circuit connection points that are matched to a common set of physical connection points. The modules can be plugged together like building blocks to form a large variety of AC/DC drive stacks that can be tailored to meet an exact system requirement. The drive stack may be used in conjunction with a controller to adjust the torque and speed of an AC/DC electric motor.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: January 10, 2012
    Assignee: Parker-Hannifin Corporation
    Inventors: Jeremy Howes, David Levett, John Froeb
  • Patent number: 8041475
    Abstract: An electric parking brake system includes an electric parking brake mechanism that includes a brake which suppresses rotation of a wheel and an electric motor which applies or releases the brake, and that maintains a vehicle at a standstill while the brake is applied. A parking switch selectively outputs an application command for applying the brake and a release command for releasing the brake in response to an operation of an operating portion for the parking switch. A parking switch malfunction determination unit determines whether the parking switch malfunctions, and a parking brake automatic control unit automatically applies the brake by operating the electric motor when an ignition switch of the vehicle is turned off in response to an operation of an operating portion for the ignition switch, in a case where the parking switch malfunction determination unit determines that the parking switch malfunctions.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: October 18, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kozo Fujita, Tomohiro Yamashita, Hideo Kondo, Hidehiro Yamamoto
  • Patent number: 7940016
    Abstract: The present invention relates generally to regenerative braking methods for a hybrid vehicle such as a hybrid locomotive, which are compatible with optimum management of a large battery pack energy storage system. Four methods for recovering energy from regenerative braking and for transferring this energy to an energy storage systems are disclosed. These methods may also be used with battery operated vehicles.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: May 10, 2011
    Assignee: RailPower, LLC
    Inventors: Frank Wegner Donnelly, John David Watson, Ronald B. Bailey, Andrew C. Tarnow
  • Patent number: 7880418
    Abstract: The following invention is an electromechanical system (1) that is to be connected to an electricity supply (7), comprising: an electric machine (2) that can operate as an independent generator with a rotating shaft, and a switching system (9) allowing i) in the first configuration, the electric machine to operate as a motor in the case where the connected device (4) is normally driven or as a generator in the case where the coupled device is normally driving, and ii) in the second configuration, the electric machine to operate as an independent generator, the electrical energy generated by the electric machine (2; 22) being dissipated in the machine and in a dissipative load (13).
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: February 1, 2011
    Assignee: Moteurs Leroy-Somer
    Inventor: Christian Petit
  • Patent number: 7812555
    Abstract: An electric powertrain for use with an engine and a traction device is disclosed. The electric powertrain has a DC motor/generator operable to receive at least a portion of a first mechanical output from the engine and produce a DC power output. The DC motor/generator is also operable to receive DC power and produce a second mechanical output. The electric powertrain further has a drivetrain operable to receive the DC power output and use the DC power output to drive the traction device. The drivetrain is also operable to generate DC power when the traction device is operated in a dynamic braking mode.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: October 12, 2010
    Assignee: Caterpillar Inc
    Inventor: Rodwan Tarek Adra
  • Patent number: 7781992
    Abstract: A power supply device for an electric motor, operated either in a normal operating mode and/or an emergency operating mode, in particular, for an actuator in a motor vehicle and a method for operation of an electric motor in a normal operating mode and/or an emergency operating mode, in particular, for an actuator in a motor vehicle. The electric motor is powered by AC in the normal operating mode and by DC in the emergency operating mode, in particular, in a fault situation.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: August 24, 2010
    Assignee: Schaeffler KG
    Inventor: Christian Acker
  • Patent number: 7773369
    Abstract: A cooling arrangement is disclosed for electrical components which are arranged in a housing of a soft starter which in particular may be designed for operation of an electric motor. In at least one embodiment, the cooling arrangement includes at least one fan arranged inclined in an opening in a housing wall such that the rotation axis of the fan is at an angle to the normal to the housing wall.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: August 10, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Marco Dornauer, Norbert Reichenbach
  • Patent number: 7764029
    Abstract: An activation circuit and a method for operating an activation circuit for a DC motor having an electrically actuated stopping brake, in particular for adjusting a rotor blade of a wind or water power facility. The activation circuit includes an emergency operation supply unit and a three-phase bridge inverter. The emergency operation supply unit is connected so it is disconnectable via an emergency operation network switching element to the intermediate circuit of the three-phase bridge inverter, the DC motor is connected via an emergency operation motor changeover element either to the three-phase bridge inverter or to the emergency operation supply unit, and the stopping brake is connected via an emergency operation brake changeover element either to the three-phase bridge inverter or to the emergency operation supply unit.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: July 27, 2010
    Assignee: Moog Unna GmbH
    Inventors: Andreas Buente, Lars Kauke, Dirk Fedder
  • Patent number: 7737647
    Abstract: The invention concerns a reversible current rectifier, for connection to part of a polyphase network and to a continuous bus comprising a plurality of rectifier cells each rectifier cell including a rectifying device and a on-way electronic switch connected in anti-parallel with the rectifier device, the rectifying devices of different cells being arranged so as to form one rectifier. Each rectifier cell comprises means for controlling the electronic switch of the cell arranged to control the latter in closure after detecting a conduction of the rectifying device of the cell so as to enable current to be returned to the network. The control means are arranged to receive a signal external to the cell, for controlling the opening of the electronic switch, derived from another rectifier cell.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: June 15, 2010
    Assignee: Moteurs Leroy-Somer
    Inventors: Jean-Marie Andrejak, Christian Andrieux, Mathias Tientcheu-Yamdeu, Alexandre Lagarde
  • Patent number: 7556129
    Abstract: A brake assembly is configured for a strapping tool tensioning motor. The brake assembly includes a one-way bearing operably connected to the motor output shaft. The bearing has at least two stop members. A brake element is mounted to the motor movable toward and away from the bearing for movement into and out of engagement with one of the bearing stop members. A brake release is connected to the brake element. The brake element is biased into engagement with a bearing stop member. When the brake is engaged with the bearing stop member, the motor can freely rotate in the first direction and cannot rotate in the second reverse direction. The brake release moves the brake element out of engagement with the one of the bearing stop members and the motor can freely rotate in the second reverse direction until the brake release is reengaged with one of the bearing stop members.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: July 7, 2009
    Assignee: Illinois Tool Works, Inc,
    Inventors: Dorene K. Nix, legal representative, Robert J. Nix
  • Patent number: 7498756
    Abstract: A braking system for electric step motors that operate in conjunction with a light assembly, including a moving head for pan or tilt thereof or for moving internal optical components. The step motors are connected to driving means to reduce movement speed of the moving head during power down and are connected through switches with a first operating position to connect the driving means to the step motors, and with a second power down position to establish a current path through a motor winding. Movements after power down take place very slowly and without generating noise for use in a theatre where the lamp may be switched off because a fuse burn out, and so cease operation without making disturbing noise. In a controlled power down, noise is reduced when several lamp fixtures placed side by side at the same time move to a stop position.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: March 3, 2009
    Assignee: Martin Professional A/S
    Inventor: Jan Oechsle
  • Patent number: 7362065
    Abstract: Several embodiments of electric vehicle control and control apparatus wherein the amount of regenerative braking of the vehicle and the type of braking is determined by current conditions to provide simpler and more effective control regardless of condition of the power source for the vehicle.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: April 22, 2008
    Assignee: Yamaha Motor Electronics Co Ltd
    Inventor: Yukiyasu Takano
  • Patent number: 7291996
    Abstract: An optical disc drive 1 includes a spindle motor 11 for rotating the optical disc 2 and a spindle driver for driving the spindle motor 11 equipped with a rotation number counter 232 for measuring the rotation number of the spindle motor 11. A brake for braking the spindle motor 11 to reduce the rotation number thereof, can include at least three types of brake modes, and a selector for selecting one of the types of brake modes in response to the rotation number measured by the rotation number counter 232 when the rotation number of the spindle motor 11 is to be reduced. The optical disc drive 1 may further include a judging circuit for judging whether the rotation number of spindle motor 11 measured by the rotation number counter 232 reaches a predetermined target rotation number when the rotation of the optical disc 2 is to be stopped by the spindle motor 11.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: November 6, 2007
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Yoshiaki Aso, Takashi Tateshima, Tatsuya Goto
  • Patent number: 7224137
    Abstract: The present invention provides an instantaneous fan stopping method and structure thereof. The method and structure can eliminate the inertial rotating state of the fan when the power supplied to the fan is cut off. In accordance with the present invention, a closed circuit is formed between the two terminals of the coil used to drive the fan. When the closed circuit is formed, the inertial rotation of the fan can generate an induced current in this coil, which, in turn, generates a magnetic force to stop the fan.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: May 29, 2007
    Assignee: Delta Electronics, Inc.
    Inventors: Magellan Chiu, Chun-Lung Chiu, Po-Tsun Kuo, Wen-Shi Huang
  • Patent number: 7176648
    Abstract: An energy management control apparatus for a molding machine that includes a first electrically-driven prime mover configured to drive at least a first molding machine device, and a second electrically-driven prime mover configured to drive at least a second molding machine device, includes a common DC link configured to provide DC energy to the first electrically-driven prime mover and to the second electrically-driven prime mover. A slave axis is configured to supply and absorb energy from to/from the common DC link.
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: February 13, 2007
    Assignee: Husky Injection Molding Systems Ltd.
    Inventor: Christopher Wai-Ming Choi
  • Patent number: 7170246
    Abstract: A motor control apparatus supplying braking power to brake a motor comprises a braking power providing unit to receive input power having an input power voltage lower than a braking power voltage and to boost the input power voltage up to the braking power voltage to brake the motor; a switching unit closing to allow the braking power providing unit to store the input power and opening to allow the braking power providing unit to output the braking power by boosting the input power voltage and a stored power voltage up to the braking power voltage; and a controller to control the switching unit to close and to open. With this configuration, a motor control apparatus is provided, in which an additional braking power supply supplying braking power to brake a motor is not needed, thereby decreasing a production cost and a size of a product.
    Type: Grant
    Filed: February 3, 2004
    Date of Patent: January 30, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jang-Hyoun Youm
  • Patent number: 7129658
    Abstract: A braking system is disclosed that includes a brake (22), a ram (20) shiftable in a linear direction relative to the brake (22) for actuating the brake (22), and a stop (24) for limiting movement of the ram (20). The system further includes a motor (12) for moving the ram (20) which motor (12) includes a stator and a rotor (13) and a commutation sensor (14) producing an output. A motor controller (28) receives a commutation signal based on the output and controls the motor (12) based on the commutation signal. A processor (31) also uses the commutation signal to generate a position signal indicative of the position of the ram (20) relative to the stop (24). Methods of using this system are also disclosed.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: October 31, 2006
    Assignee: Honeywell International Inc.
    Inventor: Russ Ether
  • Patent number: 7053570
    Abstract: A control circuit operates a dual directional DC motor from an AC power source. A controller has first and second position indication inputs adapted to receive respective first and second position indications. The controller also has first and second direction outputs, which respectively energize one of two first relay coils having contacts outputting respective AC voltages responsive to the direction outputs. A full wave bridge rectifier receives the AC voltage and responsively outputs a DC voltage, which energizes a second relay coil. A contact thereof directs that voltage to two sets of first relay contacts, which are also responsive to the direction outputs, and which respectively provide a positive or negative DC voltage to the motor. Another second relay coil contact provides a braking action to the motor responsive to removal of the DC voltage from the rectifier output following removal of the AC voltage to the rectifier.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: May 30, 2006
    Assignee: Eaton Corporation
    Inventors: Todd M. Lathrop, Derrick G. Berad, Ronald D. Hartzel, James R. Hanna
  • Patent number: 7038411
    Abstract: In the motor stop control device utilizable for the reel-type gaming machine 1, there are provided the stepping motor 70 having two pairs of excitation phases for rotating the reel 3 on the outer periphery of which a plurality of symbols are formed, the speed reduction mechanism 700 for transmitting rotation of the stepping motor 70 to the rotation shaft of the reel 3 with a predetermined speed reduction ratio and the main CPU 40 for conducting speed reduction treatment to reduce rotation speed of the stepping motor 70 and excitation treatment by 2-phase excitation against the stepping motor 70 when the motor stop command occurs.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: May 2, 2006
    Assignee: Aruze Corp.
    Inventors: Takao Nireki, Shingo Omomo, Yuuichirou Suzuki
  • Patent number: 7034482
    Abstract: Disclosed is a control apparatus for a hybrid vehicle having an engine, a drive motor (3) that regenerates power, and an electric power storage device (6) that gives/receives power to/from the drive motor (3). The control apparatus includes power consumption means (2) for consuming power; a sensor (26, 27) that detects a state of charge of the electric power storage device; means (18, 23, 51) for detecting a driving state of the vehicle; and a controller (9).
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: April 25, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Susumu Komiyama, Hiroshi Iwano, Musashi Yamaguchi, Hideaki Watanabe
  • Patent number: 6900606
    Abstract: A device for inrush current prevention and dynamic braking in a motor having a plurality of power inputting terminals, comprises a diode rectifying unit rectifying power supplied from an AC power supplying unit; a capacitor smoothing the power rectified by the diode rectifying unit; a resistor disposed between the AC power supplying unit and the capacitor, being connected to the capacitor; an inverter connected to terminals of the capacitor and the power inputting terminals of the motor, inverting the power from the capacitor into an AC power having multiple phases and supplying the AC power having multiple phases to the motor; a dynamic braking circuit short-circuiting the power input terminals of the motor; and a relaying unit including a first node connecting the dynamic braking circuit to the resistor and a second node connecting the diode rectifying unit to the capacitor in parallel.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: May 31, 2005
    Assignee: Samsung Electronics Co., LTD
    Inventor: Jang-hyoun Youm
  • Patent number: 6879123
    Abstract: A device to control a 3-phase motor having an inverter connected to each phase terminal and a brake to arrest the 3-phase motor, includes a power supply to supply power to the brake and the inverter at the same time based on a predetermined synchronization signal. The device also includes a control unit to output an inverter control signal to control the inverter and a power control signal to enable the power supply to supply the power to the brake and the inverter. Thus, the device to control a 3-phase motor has an immediate response to a control signal with a reduced production cost and a system size, by reducing circuit components such as a brake relay and a brake power supply.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: April 12, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jang-hyoun Youm
  • Patent number: 6864651
    Abstract: A motor control circuit includes a forward rotation control circuit, a reverse rotation control circuit, and a brake control circuit. The forward rotation control circuit allows a first current source to supply a first current signal to a motor drive circuit for operating a motor in a forward rotation mode. The reverse rotation control circuit allows a third current source to supply a third current signal to the motor drive circuit for operating the motor in a reverse rotation mode. The brake control circuit allows a second current source and a fourth current source to respectively supply a second current signal and a fourth current signal to the motor drive circuit for operating the motor in a brake mode. The motor control circuit reduces power dissipation in the brake mode since the second and fourth current signals may be smaller than the first and third current signals.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: March 8, 2005
    Assignee: Aimtron Technology Corp.
    Inventors: Rong-Chin Lee, Li-Cheng Chen
  • Patent number: 6577483
    Abstract: An apparatus for decreasing speed of an inverter driven inertial load within a time period for use with a dynamic brake across a DC link including a controller for controlling the inverter to regulate the power returned to the brake such that, when a brake command is received, the power is increased during a power-up period while motor deceleration begins and up to a constant power level after which the constant power level is maintained by increasing torque such that the dynamic brake is fully used during the majority of a braking cycle and a method to accomplish the same.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: June 10, 2003
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: John T. Steicher, Gary R. Woltersdorf, Jeffrey M. Theisen, Jerry Dee Thunes, John Joseph Golownia, Jr.
  • Patent number: 6571163
    Abstract: An electrically controlled, decentralized control system in a vehicle includes at least two energy sources which are independent of one another and at least two control units. In addition, at least one high-current load is allocated to each control unit. The high-current load is permanently allocated to one of the energy sources, while the control units are selectively switchable to the one or the other energy source.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: May 27, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Hans Heckmann, Reinhard Weiberle, Bernd Kesch
  • Patent number: 6564110
    Abstract: A discrete Kalman filter 12 and a disturbance estimating unit 13 are added to a feedback loop for feeding back a detected value of position from a position detector 6. The Kalman filter estimates position and velocity of an object to be controlled, thereafter outputting an estimated value of position and an estimated value of velocity. The disturbance estimating unit estimates from a command value of current and the estimated value of velocity the disturbance that is added to a load 5. The estimated value of position is fed back to a position controller 1, and the estimated value of velocity is fed back to a velocity controller 2. Further, a difference between a target value of current outputted from the velocity controller and the estimated value of disturbance is output as the command value of current.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: May 13, 2003
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventors: Kenichi Makino, Yoshiyuki Tomita, Hidehiko Mori
  • Publication number: 20030006726
    Abstract: An electrical brake system for a motor vehicle including control modules for controlling the front axle brakes and the rear axle brakes, in which the control modules for the front axle brakes include fault-tolerant behavior, and in which the control modules for the rear axle brakes do not have any external effect in the event of a fault state in the area of the control module.
    Type: Application
    Filed: April 10, 2002
    Publication date: January 9, 2003
    Inventors: Reinhard Weiberle, Bernd Kesch