Braking Patents (Class 318/362)
  • Publication number: 20080315805
    Abstract: An adaptable electrical braking system for an electrical propulsion system of a traction vehicle is provided. The electrical braking system is configured to dissipate electrical energy in a plurality of resistor grids. The braking system includes a braking system assembly including a baseline chopper circuit topology. The baseline chopper circuit topology includes a first semiconductor-based circuitry in an enclosure for accommodating the first semiconductor-based circuitry. The braking system further includes a second semiconductor-based circuitry electrically coupled to the first semiconductor-based circuitry to produce a chopper including a chopper circuit topology fully contained in the enclosure. The second semiconductor-based circuitry includes a circuit topology selectable to adapt the baseline chopper circuit topology to meet distinct operational requirements to be fulfilled by the braking system.
    Type: Application
    Filed: June 21, 2007
    Publication date: December 25, 2008
    Inventors: Ajith Kuttannair Kumar, Henry Todd Young, Alvaro Jorge Mari Curbelo
  • Patent number: 7466091
    Abstract: The invention relates to a vehicle electric drive system. There is a need for a brake responsive vehicle electric drive system. A vehicle electric drive system includes an internal combustion engine, an electric motor/generator driven by the engine, and drive wheels driven by a traction motor/generator. The motor/generators are controlled by a control system which receives signals from an operator speed control member, wheel speed sensors, and a pair of brake pedal position sensors, each connected to a corresponding left or right brake pedal. In response to operation of the brake pedals, the controller coordinates operation of the electric drive system with operation of the brake pedals.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: December 16, 2008
    Assignee: Deere & Company
    Inventors: Arun Kumar Seksaria, Mervin Peter Kizlyk, Robert Eugene Kasten
  • Patent number: 7453220
    Abstract: A drive, including at least a brake and an electromotor, is connected to an output stage with the aid of supply lines, the brake being supplied from a brake control, the brake control being connected to the supply lines for its supply, via capacitors.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: November 18, 2008
    Assignee: Sew-Eurodrive GmbH & Co. KG
    Inventors: Günter Becker, Josef Schmidt
  • Patent number: 7439695
    Abstract: A mechanical braking system is provided for a vehicle having an electric propulsion system which is utilized for retard speed regulation. While the retard speed regulation is normally performed via electric braking, in some conditions the electric braking is not able to maintain a desired speed for the vehicle. In this condition, upon receipt of a signal from the electric propulsion system, the mechanical braking system is automatically activated so as to maintain the vehicle at the desired speed.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: October 21, 2008
    Assignee: Komatsu America Corp.
    Inventors: Khanh Tu Ngo, Nobuki Hasegawa, Gerald Horst
  • Patent number: 7436138
    Abstract: A method for emulating induction motor operation using an electronically commutated motor (ECM) is described herein. The method includes receiving, at the ECM, a desired operating torque, accessing induction motor operating characteristics stored within the ECM, and calculating a new torque demand if a speed associated with the desired operating torque is greater than a breakdown speed of the induction motor. The method also includes setting an output torque for the motor substantially equal to the torque demand for the motor if the speed associated with the desired operating torque is less than the breakdown speed of the induction motor, moving the output torque toward the demanded torque if not substantially equal, and operating the motor at the output torque.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: October 14, 2008
    Assignee: Regal-Beloit Corporation
    Inventor: Brian L. Beifus
  • Publication number: 20080218105
    Abstract: In a method for operating a fuel pump of a motor vehicle, the fuel pump is driven by an EC electric motor for conveying fuel in a direction of an internal combustion engine. Accordingly, when no more fuel is required, the EC electric motor of the fuel pump is switched off in such a way that a rotor of the EC electric motor slows down in a defined manner, so that the rotor of the EC electric motor assumes a defined relative position with respect to the stator of the EC electric motor after slowing down.
    Type: Application
    Filed: March 7, 2008
    Publication date: September 11, 2008
    Applicant: DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT
    Inventor: Arno Wunderlich
  • Patent number: 7414376
    Abstract: In such a product that torque of a motor is continuously generated when a rotation number of the motor is nearly equal to zero, since an output voltage is kept at a constant value in accordance with a rotation position of the motor, such a condition that currents are concentrated in a specific element are maintained. As a result, a temperature of the specific element is increased, so that there are problems that a temperature fail of an inverter apparatus may readily occur, and thus, lifetimes of elements are lowered. In a power converter of a motor drive apparatus, windings are energizing-controlled in such a manner that only 1 phase of a switching circuit is pulse-width-controlled when the motor is under motor locking condition.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: August 19, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Masataka Sasaki, Hideki Miyazaki, Toshiyuki Ajima, Hiroyuki Saito
  • Publication number: 20080150458
    Abstract: The invention relates to an adjustable brake device that can be used in conjunction with a hinge mechanism of a folding electronic device, e.g. a clamshell mobile phone. The adjustable brake device comprises a brake actuator that is able to generate a braking force responsive to a magnetic flux directed to the brake actuator and a magnetic circuit that has a magnetizing device arranged to generate the magnetic flux and a magnetic path arranged to conduct the magnetic flux from the magnetizing device to the brake actuator. At least two elements of the magnetic circuit are movable with respect to each other. A mutual position of the at least two elements can be used for determining strength of the magnetic flux directed to the brake actuator. The braking force can be adjusted in a relatively simple way by adjusting the mutual position of the movable parts of the magnetic circuit.
    Type: Application
    Filed: December 22, 2006
    Publication date: June 26, 2008
    Inventors: Matti Ryynanen, Joonas Ryynanen, Tessa Ryynanen, Ilpo Kauhaniemi
  • Publication number: 20080129234
    Abstract: The present invention relates to an activation circuit and a method for operating such an activation circuit for a DC motor (04) having electrically actuated stopping brake (07), in particular for adjusting a rotor blade of a wind or water power facility. The activation circuit comprises an emergency operation supply unit (03) and a three-phase bridge inverter (01). The emergency operation supply unit (03) is connected so it is disconnectable via an emergency operation network switching element (12) to the intermediate circuit (16, 17) of the three-phase bridge inverter (01), the DC motor (04) is connected via an emergency operation motor changeover element (13) either to the three-phase bridge inverter (01) or to the emergency operation supply unit (03), and the stopping brake (07) is connected via an emergency operation brake changeover element (14) either to the three-phase bridge inverter (01) or to the emergency operation supply unit (03).
    Type: Application
    Filed: October 16, 2007
    Publication date: June 5, 2008
    Inventors: Andreas BUENTE, Lars KAUKE, Dirk FEDDER
  • Publication number: 20080129232
    Abstract: A method for controlling stopping of a vibration generating stepping motor is a method for controlling the stopping of an vibration generating stepping motor by a control unit, characterized in that the method includes: stopping a supply of a driving pulse to the vibration generating stepping motor while applying a driving voltage to the vibration generating stepping motor; applying the driving voltage to the stepping motor, which does not completely stop, for an optimum braking time according to a motor configuration of the stepping motor, so as to brake the stepping motor; and stopping the applying of the driving voltage to the stepping motor which is rotating under inertia after the elapse of the optimum braking time.
    Type: Application
    Filed: December 28, 2006
    Publication date: June 5, 2008
    Inventors: Masaaki Matsubara, Kazuaki Sato, Mikio Umehara, Yoshiaki Tsuzaki
  • Patent number: 7339335
    Abstract: A brake system and method for a direct current brushed motor without a Hall sensor are provided. After the system is activated, the motor is pre-braked in order to detect and record the stationary armature current while the motor is in a stationary state. As the motor is required to be braked, a reverse control voltage is generated and then the armature current value is detected. When the detected armature current value is equal to the stationary armature current value, the operation of braking the DC brush motor is accomplished. The invention can achieve the goal of braking the motor to a stop quickly, no matter which state the motor is in. Besides, it can be applied to different kinds of motors.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: March 4, 2008
    Assignee: Sunplus Technology Co., Ltd.
    Inventors: Hsing Sheng Huang, Wen Chun Feng
  • Publication number: 20080048595
    Abstract: A reverse torque, forward commutation motor driver system for a phased motor rapidly decelerates or “brakes” the motor by exciting, in sequence, a complementary excitation signal in each normal commutation state of the forward state machine, thereby providing an active braking effect. After active braking reduces the rotational velocity of the motor below a threshold, a dynamic braking technique can replace the active braking, wherein high-side drivers are set to an opposite voltage as compared to low-side drivers.
    Type: Application
    Filed: August 22, 2006
    Publication date: February 28, 2008
    Inventors: JiaHong Shu, Tze Ming Jimmy Pang, Larry Robert Hedding, KianKeong Ooi, JuneChristian Ang, Kwee Teck Say, Danny Joe Kastler
  • Patent number: 7327110
    Abstract: A drive system with an electric motor is described, which includes an integrated armature short-circuit brake and a mechanical brake. If the electric motor cannot be controllably slowed down, a control signal is applied at an activation time to the integrated armature short-circuit brake and the mechanical brake, and the armature short-circuit brake is switched off when reaching a thermal load limit for the electric motor or the control electronics.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: February 5, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ronald Hauf
  • Patent number: 7298107
    Abstract: A control unit for a moveable barrier, such as a garage door, includes a microcontroller connected to a motor speed detector, motor current sensor or a sensor for determining forces exerted on or by the barrier. A user interface includes user actuatable switches for setting a first maximum force value to be exerted on or by the barrier when moving in one direction and the microcontroller automatically sets the value of a second maximum force to be exerted on or by the barrier when moving in the opposite direction. The second force value may be based on the force value set by the user or the second force value may be a preset value. Both force limits may be automatically set as a function of a maximum force exerted on said barrier during movement thereof, during a force learning operation.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: November 20, 2007
    Assignee: Overhead Door Corporation
    Inventor: Michael T. McMahon
  • Patent number: 7291997
    Abstract: A motor has built therein a brake for stopping the rotation of the motor and a brake controlling circuit for controlling the brake. The motor is further provided with a bypass circuit for supplying an electric power directly to the brake and a terminal for connecting a power source to the bypass circuit. When the brake controlling circuit develops a fault, the brake is directly released by an external power source.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: November 6, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Takamasa Nakamura
  • Patent number: 7285926
    Abstract: A traction control system for controlling an electric traction motor drivingly coupled to a wheel of a tractive vehicle. The traction control system includes means for determining speed of the wheel, means for determining tractive effort of the wheel and a control circuitry for controlling drive signals to the motor based upon the wheel speed and tractive effort.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: October 23, 2007
    Assignee: General Electric Company
    Inventors: Jeremy Thomas McGarry, Somakumar Ramachandra-Panicker, Ajith Kuttannair Kumar, Venkatarao Ryali, Bret Dwayne Worden, Jeffrey Louis Daigle, Paul Kenneth Houpt
  • Publication number: 20070200523
    Abstract: In such a product that torque of a motor is continuously generated when a rotation number of the motor is nearly equal to zero, since an output voltage is kept at a constant value in accordance with a rotation position of the motor, such a condition that currents are concentrated in a specific element are maintained. As a result, a temperature of the specific element is increased, so that there are problems that a temperature fail of an inverter apparatus may readily occur, and thus, lifetimes of elements are lowered. In a power converter of a motor drive apparatus, windings are energizing-controlled in such a manner that only 1 phase of a switching circuit is pulse-width-controlled when the motor is under motor locking condition.
    Type: Application
    Filed: January 18, 2007
    Publication date: August 30, 2007
    Applicant: HITACHI, LTD.
    Inventors: Masataka Sasaki, Hideki Miyazaki, Toshiyuki Ajima, Hiroyuki Saito
  • Patent number: 7228772
    Abstract: A saw is disclosed having a detection system adapted to detect a dangerous condition between a person and a saw blade, and a brake adapted to stop the saw blade in response to detection of the dangerous condition. The saw further includes a brake positioning system that allows the brake to be positioned in at least two different operable positions to accommodate at least two different blade diameters. The saw may include a system to detect brake-to-blade spacing.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: June 12, 2007
    Assignee: SD3, LLC
    Inventor: Stephen F. Gass
  • Patent number: 7227324
    Abstract: A method for controlling an electrically actuable parking brake is described. In this method the cutoff current of the electric motor is varied to compensate for example for changes in the application force associated with aging or wear or for changes in the application force due to changes in the resistance and/or temperature of an electric motor.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: June 5, 2007
    Assignee: Lucas Automotive GmbH
    Inventors: Ralf Erben, Ralf Kinder, Ralf Leiter, Gregor Poertzgen
  • Patent number: 7218070
    Abstract: The present invention relates to a propeller drive arrangement for vessels used in water-borne traffic, and specifically to a propeller drive arrangement containing a propulsion unit, and to such an arrangement, which contains a propulsion unit, which is turnable relative the hull of the vessel. Particularly the present invention relates to a system and a method for braking a motor of a propulsion unit. The solution for braking the propulsion unit according to the present invention is based on short-circuiting a permanently magnetized motor.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: May 15, 2007
    Assignee: ABB O Y
    Inventor: Jari Ylitalo
  • Patent number: 7215093
    Abstract: A motor drive circuit includes a first transistor. The collector of a second transistor is connected to the emitter of the first transistor in series. A motor is connected to a connection point between the first and second transistors. A first brake control circuit turns off the first transistor and turns on the second transistor in accordance with a brake operation instruction signal. A second brake control circuit forces the first transistor to be turned OFF in accordance with the brake operation instruction signal independently from the first brake control circuit.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: May 8, 2007
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Kaoru Usui, Tomomitsu Oohara
  • Patent number: 7170245
    Abstract: A motor power supply including a DC supply part having a pair of supply terminals; an inverter having a pair of connection terminals respectively connected to the supply terminals thereof to receive DC power therefrom and to supply AC power to a motor, a breaking resistor and a control switching element disposed in parallel in an additional line connecting the pair of connection terminals to each other, a control switching element disposed with the breaking resistor in the additional line, a breaking switch disposed to one of the connection terminals and switched to either a normal position or a breaking position connecting the one connection terminal to a corresponding supply part or to the additional line, a speed detector detecting a motor speed and a control part controlling the breaking switch to switch to the breaking position and controlling the control switching element so that an on-off interval of the control switching element is controllable depending on the detected speed.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: January 30, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jang-hyoun Youm
  • 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: 7113361
    Abstract: An apparatus, method and system for retracting a read/write head (13) to a landing position of a disk (11) in a disk drive system (10) which includes an actuator (33) coupled with the head (13) for retracting in a first direction toward an outside diameter of the disk (11) and a second direction toward an inside diameter of the disk (11) in response to corresponding signals. A control device (32) coupled with the actuator (33) which is adapted for determining a retract direction for the read/write head (13), wherein a first signal indicative of a first direction and a second signal indicative of a second direction is provided to the actuator (33), the control device (32) further providing the first signal following a loss of power which energizes the disk drive motor (38) of the disk drive system and providing the second signal subsequent to providing the first signal for retracting the read/write head (13) to the landing position.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: September 26, 2006
    Assignee: Texas Instruments Incorporated
    Inventor: Mehedi Hassan
  • Patent number: 7109686
    Abstract: This invention is a system and a method that uses the braking resistor, commonly used and available in electrically or hybrid-electrically propelled vehicles, to limit the precharge current during the startup of a high power ultracapacitor pack energy storage device and/or safely and rapidly discharge an ultracapacitor pack for maintenance work or storage to lengthen the life of the individual ultracapacitor cells and, correspondingly, the whole pack. The use of the braking resistor for precharging an ultracapacitor energy storage pack is an effective and less expensive method compared to other methods such as a separate DC-to-DC converter. This method includes the control logic sequence to activate and deactivate switching devices that perform the connections for the charging and discharging current paths.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: September 19, 2006
    Assignee: ISE Corporation
    Inventors: Juergen J. Schulte, Swen O. Ruppert, Eugen Holl
  • Patent number: 7095196
    Abstract: A vehicle driving force control apparatus is configured to prevent co-rotation of the motor caused by rotation of a pair of wheels when a clutch connecting the wheels and the motor is released (disconnected). When the clutch is released, the motor is braked by short circuiting the armature. The motor is then braked again by setting the field current of the motor to 0 when the rotational speed of the motor reaches 0. After the clutch is released, a braking-direction field current is applied to the motor in accordance with the decreasing rotational speed of the motor such that the braking force is decreased as the rotational speed of the motor decreases.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: August 22, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hidemichi Tokunou, Satoru Chuujou, Yasuo Matsunaga
  • Patent number: 7071645
    Abstract: A braking device for an electric motor of a power tool has a short circuit switch for short circuiting an armature winding of the electric motor during a braking process, the short circuit switch for controlling its switch condition having a control input, a control unit connected with the control input of the short circuit switch for performing a phase control of the short circuit switching during the braking process in order to avoid brush fire; also an electrical device with such a braking device and a braking method are proposed as well.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: July 4, 2006
    Assignee: Robert Bosch GmbH
    Inventors: Dietmar Hahn, Roland Walter
  • 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: 7045985
    Abstract: A reluctance force brake device applies the coupling and combining concept of the reluctance braking unit to the original rotating source or say mechanical rotation axle for kinetic energy output. The reluctance braking unit, utilizing electrical energy from forward electrical energy source or brake reverse recover energy, generates the reverse reluctance force to reduce the speed of rotating source to operate brake action. The driving design can be extended to absorb the brake reverse recovery energy for recycling in motives related applications, which can help to upgrade or replace the bake system of traditional mechanical vehicles or electrical vehicles, and improve the applicability for drive-by-wire development trend.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: May 16, 2006
    Assignee: Industrial Technology Research Institute
    Inventors: Wen-Nan Huang, Ching-Cheng Teng, Wan-Pei Chen, Chih-Hsing Fang, Mu-Ping Chen
  • Patent number: 7042178
    Abstract: A motor driving apparatus including a regeneration control function and a power storage device for accumulating a regenerative current and for supplying an inverter section with electric power during acceleration. The inverter section is connected to a converter section by a DC link to which regeneration start detecting means and the power storage device are connected. When the regeneration start detecting means detects that a voltage at the DC link reaches a regeneration control start voltage, a controller controls switching elements and starts regeneration control. The regenerative current is accumulated in the capacitor through a diode. When a motor is in a power running state, the switching elements are turned on to apply the voltage at the power storage device to the DC link, and the charged power is utilized for motor acceleration.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: May 9, 2006
    Assignee: Fanuc LTD
    Inventors: Yuuichi Yamada, Shigeki Hanyu, Mamoru Yaeshima
  • Patent number: 7034480
    Abstract: A method for reducing engine fuel consumption of an electro-motive vehicle during braking, the method including steps for providing an engine for the vehicle, generating primary electric power at a primary electric power generator connected to the engine, generating primary electric power at a secondary electric power generator connected to the engine, operating a plurality of electric traction motors each coupled in driving relationship to a respective one of a plurality of driven wheels to propel the vehicle during motoring operations and to generate electricity upon braking operations of the vehicle, electrically connecting a braking switch between the traction motors and the primary electric power generator, applying braking, closing the braking switch, and transmitting power generated by the traction motors to the primary electric power generator to operate as a motor to rotate the engine and drive the secondary electric power generator to power the auxiliary equipment without fueling the engine.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: April 25, 2006
    Inventors: Ajith Kuttannair Kumar, Peter Loring Valentine
  • Patent number: 6998805
    Abstract: The invention is a motor stop control device for a rotating reel type gaming machine 1 which includes a stepping motor 70 having two pairs of excitation phases as a driving source of reels 3 having a plurality of symbols drawn thereon and in which the stepping motor is stopped in accordance with an operational instruction from outside. The device includes a deceleration transmission mechanism 700 for transmitting the rotation of the stepping motor 70 to rotating shafts for rotating the reels 3 at a predetermined reduction ratio and a main CPU 40 for performing control for reducing the rotating speed of the stepping motor 70 when a stop command for the stepping motor 70 is generated according to an operational instruction from the outside and for performing stop control of the stepping motor 70 through two-phase excitation.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: February 14, 2006
    Assignee: Aruze Corp.
    Inventors: Takao Nireki, Shingo Omono, Yuichiro Suzuki
  • Patent number: 6998804
    Abstract: A retarded electric motor designed as a series motor or an asynchronous motor having a squirrel cage rotor. A valve is provided for switching between motor operation and braking operation. During motor operation the motor is operated in a known configuration as series motor or as asynchronous motor. If configured as a series motor, the valve (S1, S2, S3) allows to bypass the armature and to operate the motor as an externally excited direct current generator when switching into braking operation. If configured as an asynchronous motor, a switch is utilized to disconnect at least two field windings from mains. A valve is utilized to excite the motor externally from mains with a pulsating direct current during braking.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: February 14, 2006
    Assignee: C. & E. Fein GmbH & Co. KG
    Inventors: Christoph Meyer, Christof Kress, Alfred Schreiber
  • Patent number: 6989644
    Abstract: The regenerative braking method and system for an electric vehicle in which regeneration current is calculated and controlled using control of an air conditioning system to consume a portion or all of the surplus regeneration power, thereby enhancing braking performance and feel. Control includes calculation of a regeneration current and comparison of the regeneration current to battery current to calculate the surplus regeneration power.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: January 24, 2006
    Assignee: Hyundai Motor Company
    Inventor: Tae Woo Kim
  • Patent number: 6979976
    Abstract: A driving system for driving a brushless motor effects a rotation control of a rotor by sequentially switching application of a current to magnetic coils disposed in a stator in response to a detection signal from a pole-position detector. The driving system comprises a controlling circuit for generating a driving signal, an inverter control circuit for controlling application of the current to the coils by adjusting opening and closing of switching devices in response to the driving signal, and a rotational speed sensor. The controlling circuit generates a braking signal when a rotational speed of the rotor is beyond a predetermined value, and transmits the braking signal to the inverter control circuit. The inverter control circuit effects a braking control in response to the braking signal by application of the current to at least one coil except those coils being excited upon reception of the braking signal.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: December 27, 2005
    Assignee: Itoh Denki Co., Ltd.
    Inventor: Toshiyuki Tachibana
  • Patent number: 6946967
    Abstract: A protective device includes a signal input intended for connection to a sensor, a signal output intended for connection to an evaluation unit, and an isolation element for galvanically separating the signal input from the signal output. The provision of the protective device prevents a transmission of overvoltages from the sensor to the evaluating unit.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: September 20, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventors: Maximilian Klaus, Gerhard Matscheko
  • Patent number: 6922032
    Abstract: In the driving operation of a sensorless three-phase motor to be used in a rotation at a comparatively low speed (approximately 2000 RPM or less) and to be bipolar driven, the number of rotations and a rotating position are accurately detected from an induced voltage and a reverse rotation brake is applied in an accurate phase, and furthermore, a short brake is applied at a set rotation number signal or less also in braking. Consequently, it is possible to prevent phase switching from being carried out in an erroneous timing and to prevent a rotation in a reverse direction by an inertia.
    Type: Grant
    Filed: January 27, 2004
    Date of Patent: July 26, 2005
    Assignee: Rohm Co., Ltd.
    Inventor: Norihiro Maeda
  • Patent number: 6917171
    Abstract: A control device and a method of stopping the spindle motor or an optical disc system. The control device primarily includes an optical disc control chip, a motor driving circuit and a spindle motor. The optical disc control chip generates and delivers a spindle motor control signal to the motor driving circuit for driving the spindle motor into rotation. During a first period, the spindle motor control signal level is controlled to produce the largest reversing torque permitted by the spindle motor for braking purpose. During a second period, the spindle motor control signal level decreases gradually to approach to a lock level that is smaller than that for actuating the spindle motor, so that the reversing torque is also decreasing gradually.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: July 12, 2005
    Assignee: VIA Technologies, Inc.
    Inventors: Tsai-Hsin Tsai, Umi Huang, Yu-I Chen
  • 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: 6876163
    Abstract: A circuit for controlling a motor's operation is disclosed. The circuit includes a relay and a motor braking circuit portion. The relay selectively interconnects a voltage source with one of a braking terminal and a motor terminal. The motor braking circuit portion has a motor brake switch connected on a first switch side to the motor terminal and a second switch side to the electrical ground. The brake switch is activated to brake the motor when the relay interconnects the voltage source with the braking terminal.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: April 5, 2005
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Gary E. Zack, Charlie Richlie, Chung H. Peng
  • Patent number: 6873128
    Abstract: A DC motor control device of a water heater includes a fanner control system, a rotation speed detection circuit, and a micro-processing unit. The fanner control system has a DC motor and a control circuit unit. The rotation speed detection circuit is connected to the DC motor for detecting the rotation speed of the DC motor. The micro-processing unit is connected to the output terminals of the rotation speed detection circuit. The output terminals of the micro-processing unit are connected to the fanner control system. The micro-processing unit is to process outputs of the rotation speed detection circuit and then output a low DC voltage to drive the DC motor, thereby having an optimal rotation speed.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: March 29, 2005
    Inventor: Kung Huei Lin
  • Patent number: 6864652
    Abstract: A drive system for an automotive vehicle of the front-and-rear wheel drive type, comprising a primary drive mechanism for drive of a set of front road wheels and an ancillary drive mechanism for drive of a set of rear roar wheels, wherein the front road wheels are driven by operation of the primary drive mechanism at a two-wheel drive mode and wherein the front and rear road wheels are driven by operation of both the primary and ancillary drive mechanisms at a four-wheel drive mode. In the drive system, a drive power applied to the primary road wheels is restricted to a predetermined value when the vehicle is driven by the primary and ancillary drive mechanisms at the front-and-rear wheel drive mode.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: March 8, 2005
    Assignee: Toyoda Koki Kabushiki Kaisha
    Inventors: Seitoku Kubo, Tadanobu Kumagai, Toshifumi Sakai, Naoyuki Sakai, Akihiro Ohno
  • Patent number: 6831432
    Abstract: Brake mode switching signal production means detects the number of revolutions per unit time of a rotor according to a change in a positional relationship between motor windings of a plurality of phases and the rotor so as to output first and second brake mode switching signals for selecting either a short brake mode or a reverse brake mode for braking the rotation of the rotor based on the number of revolutions. Control means outputs an energization control signal for controlling energization of the motor windings of a plurality of phases in response to the first and second brake mode switching signals. Thus, it is possible to reduce the braking noise and the stopping time.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: December 14, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Maki Murakami
  • Patent number: 6822408
    Abstract: In a method of holding a machine element, whose position is directly or indirectly controlled by an electromotive drive in the absence of a self-locking mechanism, the drive is halted and a brake is activated to maintain the machine element in a holding position, without shutting down the drive which remain active. The drive is thus a safe drive constructed to securely prevent a re-starting although an inadvertent shutdown is not preventable.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: November 23, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dieter Eckardt, Ronald Hauf
  • Publication number: 20040222760
    Abstract: The invention is a motor stop control device for a rotating reel type gaming machine 1 which includes a stepping motor 70 having two pairs of excitation phases as a driving source of reels 3 having a plurality of symbols drawn thereon and in which the stepping motor is stopped in accordance with an operational instruction from outside. The device includes a deceleration transmission mechanism 700 for transmitting the rotation of the stepping motor 70 to rotating shafts for rotating the reels 3 at a predetermined reduction ratio and a main CPU 40 for performing control for reducing the rotating speed of the stepping motor 70 when a stop command for the stepping motor 70 is generated according to an operational instruction from the outside and for performing stop control of the stepping motor 70 through two-phase excitation.
    Type: Application
    Filed: October 31, 2003
    Publication date: November 11, 2004
    Inventors: Takao Nireki, Shingo Omomo, Yuichiro Suzuki
  • Patent number: 6806666
    Abstract: Disclosed is a single-phase motor including a stator, a rotor adapted to rotate when electric power is applied to the stator, a ring-shaped magnet coupled to the rotor to rotate along with the rotor; a parking magnet for stopping the rotor within an effective torque generating region by a magnetic force effected between the ring-shaped magnet and the parking magnet upon braking the rotor, and a sensor unit for sensing a variation in the intensity of a magnetic field generated around the ring-shaped magnet during the rotation of the rotor, thereby sensing the position and speed of the rotor. In accordance with this configuration, the additional device used for an initial driving operation and subsequent operations of the motor can be relatively simple and inexpensive. As a result, there is an advantage in that the motor has an enhanced utility.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: October 19, 2004
    Assignee: LG Electronics Inc.
    Inventors: Sang Young Kim, Yo Han Lee, Jun Yong Lim, Yong Won Choi
  • Patent number: 6803734
    Abstract: A dynamic braking system for a vehicle, the system comprising an engine, an alternator, a plurality of alternating current (AC) electric traction motors, each coupled in driving relationship to a respective one of a plurality of driven wheels, a plurality of power inverters where each of the traction motors has excitation windings coupled in circuit with a corresponding one of the plurality of power inverters, a fuel-free dynamic braking controller, a fuel-free dynamic braking transfer switch located between one of the plurality of traction motors and the one of the plurality of power inverters in circuit with the corresponding one of the plurality of power inverters, wherein the one of the plurality of traction motors in circuit with the corresponding one of the plurality of power inverters that is separated by the fuel-free dynamic braking transfer switch does not generate and does not consume power, and wherein the fuel-free dynamic braking controller commands one of the plurality of power inverters that i
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: October 12, 2004
    Assignee: General Electric Company
    Inventors: Ajith Kuttannair Kumar, Peter Loring Valentine
  • Publication number: 20040178755
    Abstract: A motor drive circuit includes a first transistor. The collector of a second transistor is connected to the emitter of the first transistor in series. A motor is connected to a connection point between the first and second transistors. A first brake control circuit turns off the first transistor and turns on the second transistor in accordance with a brake operation instruction signal. A second brake control circuit forces the first transistor to be turned OFF in accordance with the brake operation instruction signal independently from the first brake control circuit.
    Type: Application
    Filed: February 27, 2004
    Publication date: September 16, 2004
    Inventors: Kaoru Usui, Tomomitsu Oohara
  • Patent number: RE39023
    Abstract: While a ring gear shaft 126 linked with a drive shaft rotates, a power output apparatus 110 applies a torque to a first motor MG1 attached to a sun gear shaft 125, thereby abruptly increasing a revolving speed of an engine 150, to which a fuel injection is stopped. A torque generated by a frictional force of, for example, a piston in the engine 150 and working as a reaction is applied as a braking torque to the ring gear shaft 126 via a planetary gear 120. The magnitude of the braking torque depends upon the frictional force of, for example, the piston and can be controlled by regulating the revolving speed of the engine 150 by means of the first motor MG1. This control procedure enables the energy consumed by the engine 150 to be output as a braking force to the drive shaft.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: March 21, 2006
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Shoichi Sasaki