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| Number | Title | Issue Date |
| 7944157 | Dual ring dedicated drive control system for medium voltage variable frequency drives The present invention provides a motor drive system that is substantially more robust than those of the prior art. Generally, the motor drive system provides a redundant communication topology with the drives, thereby greatly reducing the chance of failure by a faul... | 05/17/2011 |
| 7923944 | Single processor dual motor control A motor control processor is provided for motor phase current sampling of multiple variable frequency controlled electric motors, and includes an analog-to-digital (A/D) converter and a controller. The A/D converter has multiple analog inputs and generates a digital... | 04/12/2011 |
| 7863837 | Drive system for electrically driven dump truck A drive system for an electrically driven dump truck is capable of enabling electric motors for traveling to make full use of the output horsepower of the prime mover up to an output limit of the prime mover. A target motor horsepower corresponding to an operation a... | 01/04/2011 |
| 7852021 | Method and apparatus for minimizing forces on a web A method of controlling a web in, for example, a web cutter that minimizes the destructive forces that are experienced by the web. The method includes providing a motor system for driving a web handling mechanism structured to move the web, wherein the motor system ... | 12/14/2010 |
| 7714524 | System and method for controlling multiple DC fans A system and method for controlling multiple cooling fans is presented. The circuitry for directly driving each of the motors is removed from the motor casings, thus increasing air flow and reducing replacement costs should a motor fail. The system includes a common... | 05/11/2010 |
| 7679298 | Locomotive wheel speed control A method for controlling a wheel speed of a locomotive includes determining an estimated wheel speed (52) for a desired wheel set of a locomotive responsive to a locomotive operating parameter indicative of an actual wheel speed of the desired wheel set. The ... | 03/16/2010 |
| 7602128 | Device and method to configure same A motor controller for controlling an electric motor including a soft starter and a human-machine interface for control and configuration of the soft starter. The soft starter includes a visual display and a selector associated with the visual display. A method to c... | 10/13/2009 |
| 7598687 | Method and control unit for controlling fan motors A method for controlling a first fan motor using a first pulse width modulation signal having a first pulse control factor, and for controlling a second fan motor using a second pulse width modulation signal having a second pulse control factor, so as to bring about... | 10/06/2009 |
| 7538502 | Motor driver circuit, control method thereof, and electronic apparatus A motor driver circuit comprising a diving circuit for driving at least one motor, a plurality of DC/DC converters, and a stopping circuit for stopping the DC/DC converter if failure is detected in an output of the DC/DC converter, wherein a first signal is outputte... | 05/26/2009 |
| 7521881 | Constant speed barrier operator A constant speed barrier operator comprises a controller, a memory unit, a potentiometer, a pulse counter, and a motor control. The potentiometer and pulse counter monitor the position and speed of an access barrier. As the access barrier is moved between open and c... | 04/21/2009 |
| 7518323 | Motor driving device A motor driving device is disclosed that includes a first drive circuit that drives a first electric motor and increases a rotational speed of the first electric motor according to an increase in a duty ratio of a pulse signal output from an electronic control unit.... | 04/14/2009 |
| 7508146 | Multi-speed dual fan module system for engine cooling applications A dual fan module system 28 includes a two-speed electric motor 12 for operating a first fan 36, a one-speed electric motor 14 for operating a second fan 38, and switching structure K1, K2, K3, and K4 co... | 03/24/2009 |
| 7449849 | Motor control circuit and method thereof A motor control circuit and method thereof serving a coil for controlling the motor. The motor control circuit comprises a separated signal generating circuit generating a separated signal and a comparator comparing a first phase signal from a Hall element or a seco... | 11/11/2008 |
| 7432673 | Method, medium, and apparatus controlling current gain change of a spindle motor driver A method, medium, and apparatus for controlling a spindle motor of a disk drive. Particularly provided is a method, medium, and apparatus changing a current gain of a spindle motor driver according to the operating environment of the spindle motor. The method of con... | 10/07/2008 |
| 7429836 | Motor driver circuit, control method thereof, and electronic apparatus A motor driver circuit includes a diving circuit for driving at least one motor, a plurality of DC/DC converters for respectively generating different voltages, a detection circuit to detect an output failure in the plurality of DC/DC converters, and a stopping circ... | 09/30/2008 |
| 7425806 | System and method for controlling a variable speed drive A variable speed drive is provided having a converter to convert an AC voltage to a DC voltage, a DC link to filter and store energy from the converter, and a plurality of inverters. Each inverter is configured to convert a DC voltage to an AC voltage and is electri... | 09/16/2008 |
| 7424337 | Method for increasing the control dynamics of a load driven by a driveshaft of direct drive In a method for increasing the control dynamics of a load driven by a direct drive via a driveshaft, a first transducer provides a first output signal indicating a first rotation speed, and a second transducer provides a second output signal indicating a second rota... | 09/09/2008 |
| 7417386 | Electronic line shaft A method and assembly for synchronizing machine operations, the assembly comprising a reference generator for generating a speed reference signal and a position reference signal, a plurality of slave units, each slave unit including, a mechanical device, a separate ... | 08/26/2008 |
| 7371201 | Hybrid transmissions having three motor/generators and three interconnected planetary gear members The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery and three electric machines serving interchangeabl... | 05/13/2008 |
| 7362060 | Self-learning control system and method for controlling fan speed A feedback control logic system for commanding a particular air conditioning unit fan speed is driven by a pulse-width modulated signal from a control unit. The engine control unit decrements the pulse-width modulated signal to the air conditioning unit fan and allo... | 04/22/2008 |
| 7352141 | Device and method to monitor an apparatus An apparatus for monitoring and control of one or more electric motors, including a motor controller, equipped with a soft starter. The soft starter includes memory for storing operations and event data, as well as a human-machine interface for making the event info... | 04/01/2008 |
| 7339338 | Method for operating a door and a door drive for carrying out this method A door, especially a sectional door, is operated with the use of a drive unit with a drive gear, a clutch, and a position-detecting unit. The position-detecting unit detects the direction of rotation of the drive gear, detects the number of revolutions of the drive ... | 03/04/2008 |
| 7321175 | Low cost precision linear actuator and control system Embodiments of the present invention relate to a linear actuator in which the play and backlash in the linear motion of a stepper motor is reduced through the use of a torsion spring coupled to the stepper motor splined shaft. Also, embodiments of the invention incl... | 01/22/2008 |
| 7319299 | Determining types of cooling fans used in a personal computer thereby using optimum parameters to control each unique cooling fan A cooling fan, system and method for controlling cooling fans in a personal computer. A unique series of sensing points is placed on a rotating hub of a cooling fan in order to uniquely identify the particular type of cooling fan. A tachometer sensor mounted in the ... | 01/15/2008 |
| 7301293 | Electric motor car control apparatus An electric motor control apparatus including an inverter which drives a motor of an electric motor car, storage unit for storing energy for the motor, and a converter which is connected to the storage unit, the inverter comprising detection unit for detecting a pow... | 11/27/2007 |
| 7292002 | Control method for twin synchronization In a control method for a twin synchronization in which two motors for driving two axes (moving elements 3) mechanically fastened to each other by a fastening part (a fastening jig 6) are synchronously operated, one of the two axes is operated at low s... | 11/06/2007 |
| 7288909 | Electrical vehicle controller The maximum frequency and the minimum frequency are extracted from frequencies corresponding to respective axle speeds. The minimum frequency is subtracted from the maximum frequency to achieve a first frequency deviation, and also the first frequency deviation is i... | 10/30/2007 |
| 7279856 | Environmental and health monitoring circuitry for storage processor I/O annex module A hot-pluggable I/O annex module of a storage processor assembly includes interface circuitry providing connections to an optional I/O interface module. The I/O annex module includes redundant cooling fans providing cooling airflow to an I/O annex mounting area, mai... | 10/09/2007 |
| 7262530 | Mechanical interfaced system The present invention provides a mechanical interface apparatus (1) for a motor drive unit (2) in motor vehicles, in particular in a motor vehicle door, which is firmly connected to the drive unit (2) and has holding and guide devices (4, 6 | 08/28/2007 |
| 7256558 | Brushless motor and disk drive device using the same A brushless motor according to the present invention provided with a recording disk in a rotational member and serving to rotate the recording disk together with the rotational member comprises a first position detecting means for detecting a rotational position of ... | 08/14/2007 |
| 7252613 | Electrically variable transmission having two planetary gear sets with one stationary fixed interconnection The electrically variable transmission family provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and two or... | 08/07/2007 |
| 7248005 | Dual motor arrangement and control method A dual motor arrangement includes a first motor M1, a first MOSFET Q1 constructed and arranged to control operation of the first motor, a second motor M2, a second MOSFET Q2 constructed and arranged to control operation of the second moto... | 07/24/2007 |
| 7248004 | Cooling fan, in particular for motor vehicles A radiator blower, in particular for motor vehicles, is indicated that comprises a plurality of individual fans (11, 12), each having an electrical drive motor (13, 14), and a plurality of switches (S1, S2, S3), each capable of bei... | 07/24/2007 |
| 7233454 | Floppy disk control circuit and floppy disk apparatus A floppy disk control circuit enables a floppy disk apparatus to operate at high speed while current consumption is suppressed to no more than 500 mA, i.e. the maximum allowed current of an apparatus using a USB interface. The floppy disk control circuit outputs a r... | 06/19/2007 |
| 7230394 | Apparatus and method for controlling motor in washing machine An apparatus for controlling a motor in a washing machine, which includes a speed sensor for measuring speed of the motor, and a controller that compares the measured speed with a target speed to estimate a motor power applied to the motor, adjusts a running rate of... | 06/12/2007 |
| 7208897 | Motion control system for barrier drive A system for operating a barrier system such as a garage door, gate or fence. A DC motor is connected to and operates a barrier drive. A power amplifier is configured to receive power signals from a power supply and to output modulated DC signals to the DC motor. A ... | 04/24/2007 |
| 7190146 | Control system and method for an overhead bridge crane Included herein is a system and method for controlling a velocity vector of an overhead crane. A motor is attached to the crane and is positioned to move the overhead crane and has an output vector including a rotational direction and a rotational speed. A variable ... | 03/13/2007 |
| 7179187 | Electrically variable transmission having three interconnected planetary gear sets, two clutches and two brakes The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as ... | 02/20/2007 |
| 7179185 | Electrically variable transmission having three interconnected planetary gear sets, two clutches and at least two brakes The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as ... | 02/20/2007 |
| 7138772 | Electrically movable vehicle and control program for driving electrically movable vehicle The invention provides an electrically movable vehicle drivable by a simplified mode of control and a control program for driving the vehicle. A normalized value Y′ representing translation motion and a normalized value X′ representing turning motion are fed fro... | 11/21/2006 |
