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| Number | Title | Issue Date |
| 8067917 | Hysteresis mitigation and control method A system and control method mitigates hysteresis of an adjustable component in the system. A control module can allow small control changes to be effected to the component within limits of the component's and/or the system's normal hysteresis band. The control metho... | 11/29/2011 |
| 7821219 | Motor control apparatus and motor control method Size and weight reduction of a motor-driven vehicle, robot or the like is achieved. A current command Iref from a speed feedback gain is supplied to each of circuits with coefficients of sin(θm), sin(θm+2π/3) and sin(θm−2π/3) to generate three-phase signals. ... | 10/26/2010 |
| 7659681 | Numerical controller A servomotor in a numerical controller is controlled by automatically switching to either pressure control or position control in association with the command which is smaller from among a command obtained by performing pressure feedback control and a command obtain... | 02/09/2010 |
| 7560888 | Electromechanical actuator including redundant, dissimilar position feedback A relatively small, lightweight actuator includes a plurality of motors, an actuation element, a translation member, and a plurality of position sensors. The motors each supply a drive force to the actuation member, causing it to rotate. The translation member is co... | 07/14/2009 |
| 7437202 | System and method for control scheduling A system and method for controlling a device such that device operates in a smooth manner. The system may switch between control architectures or vary gain coefficients used in a control loop to control the device. As the architecture or gains are switched, the cont... | 10/14/2008 |
| 7420350 | Methods and apparatus for an active front steering actuator An active front steering system includes a motor controller configured to compute a position error from a commanded position value and an actual position value, and then enter one of two modes—a commutation enable mode and a commutation freeze mode—depending upo... | 09/02/2008 |
| 7420348 | Drive apparatus Optical disc drives designed for reduced power consumption switch the supply voltage in three stages between first, second, and third power supplies. The reduction in power consumption that is possible in the focusing and tracking drive circuits with three stage swi... | 09/02/2008 |
| 7355358 | Configurable H-bridge circuit In an implementation of a configurable H-bridge circuit, a high switch is connected to a voltage source and a low switch is connected to ground. The configurable H-bridge circuit includes a first configuration as a motor drive circuit in which the high switch and th... | 04/08/2008 |
| 7301298 | Back EMF detection circuit and method for a sensorless brushless DC (BLDC) motor A prior art direct back EMF detection method synchronously sampled motor back EMF during PWM “off” time without the need to sense or re-construct the motor neutral in a sensorless brushless DC (BLDC) motor drive system. Since this direct back EMF sensing scheme ... | 11/27/2007 |
| 7265516 | Linear electric motor controller and system for providing linear control The invention relates to a method of, and system for, linear speed control for an electric motor, in which a digital to analog converter means is used for converting an 8-bit digital signal to an analog voltage for setting voltage across a motor, a digital state mac... | 09/04/2007 |
| 7256564 | System and method for attenuating noise associated with a back electromotive force signal in a motor A method for attenuating switching noise from back electromotive force (EMF) observations in a motor is described. The motor is controlled by pulse width modulation (PWM) signals provided at a PWM frequency. The method comprises sampling back EMF observed in the mot... | 08/14/2007 |
| 7209862 | Self-diagnosing system for encoder A self-diagnosing system for an encoder. The system includes an encoder circuit for outputting information detected by an encoder; a data preparing section provided in the encoder circuit and preparing data representing a state of an abnormal-state judgment factor i... | 04/24/2007 |
| 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 |
| 7205739 | System and method for attenuating noise associated with a back electromotive force signal in a motor A method for attenuating switching noise from back electromotive force (EMF) observations in a motor is described. The motor is controlled by pulse width modulation (PWM) signals provided at a PWM frequency. The method comprises sampling back EMF observed in the mot... | 04/17/2007 |
| 7180257 | Method of brake pulse rejection in commutation pulse detection circuits A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry.... | 02/20/2007 |
| 7172247 | Motor vehicle seat system, control arrangement, actuating arrangement, and process for control of a lumbar adjustment device of a motor vehicle seat A motor vehicle seat system, control arrangement, actuating arrangement, and process are used to control a lumbar support device of a motor vehicle seat. The lumbar adjustment device has a first drive for adjustment in a first adjustment direction and a second drive... | 02/06/2007 |
| 7155298 | Device and method for generating and/or editing NC programs or NC tables In a device and a method for generating and/or editing NC programs, where in a programming mode, input fields for machining data and selection lists belonging to the input fields and including permissible machining data are displayed on a display unit. In a configur... | 12/26/2006 |
| 7142931 | Control system with controlled dead zone A method of operating a control device having a setpoint value, an error signal, and a control output is disclosed. The error signal is representative of a difference between a controlled variable and the setpoint value, the control output operable to affect the con... | 11/28/2006 |
| 7122989 | Multiple speed mover assembly A mover assembly (16) that moves or positions an object (12) includes a mover output (226), an actuator (230), and a control system (18). The mover output (226) is connected to the object (12), and the actuator (23... | 10/17/2006 |
| 7113100 | Vehicle tiredness alleviating system A vehicle tiredness alleviating system provided with at least one of a vehicle air-conditioning system for controlling a temperature in a passenger compartment, a seat heating system for heating the surface of a seat, and a seat vibration system for repeatedly vibra... | 09/26/2006 |
| 7112937 | Device and method for driving a motor A motor control device having memory for storing data indicative of a control mode and a pulse width modulation (PWM) value and logic that applies the pulse width modulation value to a voltage provided to a motor if the data indicative of the control mode indicates ... | 09/26/2006 |
| 7098622 | Programmable power supply with dual mode cross over clamps A power supply programmable for a constant current mode and a constant voltage mode and selectively operable in either mode. Respective circuits associated with each of a constant voltage loop and a constant current loop track a control voltage of the other loop whe... | 08/29/2006 |
| 7083232 | Massage apparatus and method for lumbar support An ergonomic support mountable on various seat frames has a static portion with anchors and mounts. The mounts adapt to fix said static portion to varying seat frames. An active portion is operatively engaged with the anchors of the static portion such that the acti... | 08/01/2006 |
| 7065435 | Control system for controlling the climate of a vehicle A control system for controlling the climate of a vehicle includes a control element, a temperature sensor, a motor and a microprocessor. The microprocessor may receive a temperature signal indicative of the temperature at the control element and may receive at leas... | 06/20/2006 |
| 7053583 | Brushless DC motor control A method and control system to control a brushless DC motor to a preferred position is provided. The advantages that accrue to a system employing the method and apparatus to control the brushless DC motor to a preferred position include optimizing response time, ene... | 05/30/2006 |
| 7039476 | Control system with filtered dead zone A method of operating a control device having a setpoint value, an error signal, and a control output is disclosed. The error signal is representative of a difference between a controlled variable and the setpoint value, the control output operable to affect the con... | 05/02/2006 |
| 7038412 | Device with an electromotor An arrangement having an electric motor (10) has a microcontroller (12) for influencing at least one motor function and a nonvolatile storage element (14) for storing at least one variable as a definition for that motor function. The arrangement... | 05/02/2006 |
| 6995537 | Closed-loop control system to mitigate PWM switching noise One aspect of the present invention provides a motor control system that includes a linear control system operative, in a linear mode, to provide a plurality of control signals for driving an associated motor based on an error signal. The system also includes contro... | 02/07/2006 |
| 6995538 | Rotational direction detecting apparatus for a three-phase brushless DC motor A region judging circuit judges an electric angle region of a three-phase brushless DC motor based on an output signal of a resolver. A latch timing output circuit determines an optimum latch timing. A driving direction judging circuit judges a rotational direction ... | 02/07/2006 |
| 6975087 | Closed-loop control system A control system for operating a device. The control system comprises a plurality of command elements generating command signals and a control element having a plurality of control modes. Each control mode includes a transfer function output effective to operate the... | 12/13/2005 |
| 6968240 | Method for controlling process parameters to achieve constant process conditions A method for controlling process parameters to achieve constant process conditions, including studying the actual data and reference data independent of time and applying them one on top of the other so that, in the case of optimum match, a 45° straight line is ach... | 11/22/2005 |
| 6957127 | Dynamic current-to-pneumatic converter and pneumatic amplifier A dynamically balanced pneumatic relay amplifier and a current-to-pneumatic converter are disclosed. The relay has a balance plug, a supply plug positioned on top of the balance plug, a bead chain connecting the balance plug and the supply plug, and a vent plug posi... | 10/18/2005 |
| 6838855 | Method and apparatus for controlling motor In controlling a motor in a device which drives a mechanism using the motor as a power source, in executing driving, an ideal profile of the driving is generated in accordance with a target position and a preset initial parameter, driving of the motor is controlled ... | 01/04/2005 |
| 6791293 | Sensorless control device for synchronous electric motor The invention provides a synchronous motor sensorless controller which drives a synchronous motor without use of a rotational position sensor. The controller has a relative position counter 4 which acquires an estimated position of a magnetic pole from the po... | 09/14/2004 |
| 6762745 | Actuator control providing linear and continuous force output Methods and apparatus for controlling an actuator to provide linear and continuous force output to a user of a force feedback device. To provide continuous and smooth force output in a zero crossover region of operation, two drive signals are used, each causing curr... | 07/13/2004 |
| 6757129 | Magnetic disk storage apparatus In a magnetic disk storage apparatus, when a drive current of the voice coil motor is small, the head drive control circuit executes the linear drive mode under which the voice coil motor is driven in a linear control manner, whereas when the drive current is large,... | 06/29/2004 |
| 6741052 | Post-automatically determined user-modifiable activity performance limit apparatus and method In a control system (10) having a learning mode (20) such that performance limits can be automatically determined for subsequent use during normal operating modes (40), one or more user manipulable controls (18) are provided to allow a us... | 05/25/2004 |
| 6597142 | Apparatus and method for setting control parameters of machining apparatus An apparatus for setting control parameters of a machining apparatus. The setting apparatus includes a storage unit for storing a set of control parameters for each of a plurality of machining modes; an input device for selecting one of the plurality of m... | 07/22/2003 |
| 6430465 | Abbe error correction system and method The present invention preferably employs non-contact, small-displacement, capacitive sensors to determine Abbe errors due to the pitch, yaw, or roll of a near linear mechanical stage that are not indicated by an on-axis position indicator, such as a linea... | 08/06/2002 |
| 6389325 | Apparatus including a user interface for the control of a machine tool An apparatus for the control of a machine tool includes, for the processing of a workpiece, several separate processing units that can execute definite tasks simultaneously and independently of one another. Furthermore, a display unit, as well as at least... | 05/14/2002 |
