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| Number | Title | Issue Date |
| 8063599 | Motor control device A motor control device includes a rotation speed control circuit, a voltage transforming circuit, a buffering circuit and a driving circuit. The rotation speed control circuit provides a rotation speed control signal. The voltage transforming circuit is electrically... | 11/22/2011 |
| 8030872 | Motor controller for a sunshade assembly A motor controller includes a signal-generating unit that is operable so as to control rotational direction and rotational speed of a motor of a sunshade assembly, and a processing unit that operates the signal-generating unit to rotate the motor in a reverse direct... | 10/04/2011 |
| 8030871 | Model train control system having realistic speed control A model train control system includes a controller that actively generates commands to control train operation based on user input and/or other information concerning settings of the controller, operating environment of the train, and historic operation of train con... | 10/04/2011 |
| 7990094 | Motor controller and electric power steering apparatus The micro computer 17 continue an output of a motor control signal to execute a current control to carry to each of two phases a phase current changing like a secant curve or a cosecant curve at making a predetermined rotational angle according to the phase g... | 08/02/2011 |
| 7944165 | Inspection system with dual encoders A dual encoder motion control system for high speed and high resolution motion control of a spindle is described. ... | 05/17/2011 |
| 7940022 | Motor controlling device and method thereof A motor controlling device and a motor controlling method are provided. The motor controlling device includes a first sensor, a second sensor and a signal switching circuit. The signal switching circuit is electrically connected to the first and second sensors, resp... | 05/10/2011 |
| 7915847 | Method of constant RPM control for a ventilation system A method of constant airflow control includes various controls to accomplish a substantially constant airflow rate over a significant change of the static pressure in a ventilation duct. One control is a constant I·RPM control, which is primarily used in a low stat... | 03/29/2011 |
| 7843156 | Method and apparatus for active voltage control of electric motors Methods and apparatus are provided for dynamic voltage control of electric motors. An inverter provides an output voltage to an electric motor based on a gate voltage. The method includes determining a speed of the electric motor and modifying the gate voltage based... | 11/30/2010 |
| 7821218 | Universal apparatus and method for configurably controlling a heating or cooling system A system controller is provided that includes a communication network for transmitting and receiving information from an installed blower motor controller, and a removable memory device connected to the system controller. The removable memory device includes stored ... | 10/26/2010 |
| 7772792 | Rotation control device To rotate a rotary body at a constant velocity, a swing control device of an electric rotary excavator controls rotation of the rotary body with a small first torque command value. By contrast, when operating a swing lever for acceleration, the rotation is controlle... | 08/10/2010 |
| 7750587 | Method of controlling a motor of a battery-operated power tool The method of controlling a motor which drives a tool of a power tool, includes initializing an electronic device and switching the motor on in a first step (31), continuously monitoring of the motor current (IM) and a battery voltage (UB) in a second step ( | 07/06/2010 |
| 7652444 | Actuator and method for operating an actuator An actuator (10) includes sensors (12) which are used to detect variables representing the operating state of the actuator (10) and are connected to an evaluation unit (16) associated with the actuator (10). The evaluation unit ( | 01/26/2010 |
| 7573220 | Self calibrating fan A self-calibrating, continuous variable speed fan for use in cooling electronic circuitry is disclosed. Upon initial power-up, in an environment of known temperature, the self-calibrating fan accommodates for the tolerances of its electronic components by reading a ... | 08/11/2009 |
| 7538507 | System and method for transient-based motor speed estimation with transient excitation Control systems and speed estimation systems are presented having a transient-based speed estimation system that provides a rotor speed estimate based on a measured speed-related motor transient signal, and a transient excitation system which selectively modifies at... | 05/26/2009 |
| 7442012 | Speed control for compressors Improvements to a compressor which consists in that, as soon as the measured outlet temperature (TO) reaches a certain hysteresis upper temperature limit (HMAX), the actual rotational speed of the compressor element is either lowered with a speed jump (DS) when the ... | 10/28/2008 |
| 7402975 | Motor drive device and drive method A rise in the power supply voltage as a result of a sudden speed reducing command causing the motor current to flow to the power supply is prevented. The motor drive device has a drive signal generating unit for generating a drive signal by an energizing control uni... | 07/22/2008 |
| 7394215 | Thermal control variable-speed circuit without switching noise A thermal control variable-speed circuit without switching noise is connected with a driving circuit, which controls the rotation speed of a fan motor using a driving voltage. The thermal control variable-speed circuit includes a reference voltage output circuit and... | 07/01/2008 |
| 7375485 | Control systems and methods for starting permanent magnet rotating machines Systems and methods for controlling a rotating electromagnetic machine. The rotating machine, such as a permanent magnet motor or hybrid switched reluctance motor, includes a stator having a plurality of phase windings and a rotor that rotates relative to the stator... | 05/20/2008 |
| 7372226 | Method for switching off a power tool In a method for shutting off a drive motor (12) of a power tool that drives a tool, the drive motor (12) is shut off as a function of a variable threshold value (E1) if the tool jams. The threshold value (E1) is determined in at l... | 05/13/2008 |
| 7362071 | Rotation control device, rotation control method and construction machine In an electric rotary excavator (construction machine) 1, when earth pressure acts on a rotary body 4 in an opposite direction to an instructed direction of a lever, a control-system changing means 150 of a rotation control device 100 inc... | 04/22/2008 |
| 7348751 | Apparatus for deciding position of traction A hauling unit hauls a subject to bend or rotate the subject. A control unit outputs a control signal that corresponds to a target value that is input by an operating unit. The control unit controls a variation amount of the control signal output in a predetermined ... | 03/25/2008 |
| 7327117 | PROCESS FOR MEASURING PHASE CURRENTS OF A DEVICE FOR CONTROLLING ELECTRIC MOTORS MADE WITH IMS TECHNOLOGY OR THE LIKE EMBEDDING, FOR SUCH MEASURE, RESISTANCE AND TEMPERATURE CONTROL DEVICE FOR POWER TRANSISTORS The invention is applied to the field of industrial controls for electric motors and more precisely refers to a process for measuring phase currents of an inverter or a DC controller consisting in detecting the temperature of a copper path made with IMS (Insulated M... | 02/05/2008 |
| 7315145 | System of controlling a sliding member for a vehicle A system of controlling a sliding member for a vehicle includes a motor, a pulse generating device, a counting device and a control device. The system has a range for movement of the sliding member between a position short of a first lock position and a position sho... | 01/01/2008 |
| 7312590 | Model railroad velocity controller Control over velocity of a model train may be determined based upon the speed of rotation of a control knob. A processor receives electronic pulses indicating rotation of the knob beyond a predetermined increment of angular distance. The processor calculates the amo... | 12/25/2007 |
| 7307394 | Control and motor arrangement for use in model train A control and motor arrangement in accordance with the present invention includes a motor configured to generate a locomotive force for propelling the model train. The control and motor arrangement further includes a command control interface configured to receive c... | 12/11/2007 |
| 7291995 | Air fan rotation speed control method and structure thereof An air fan rotation speed control method and a structure thereof aim to provide an automatic control mode and a manual control mode at the same time to control rotation speed regulation of an air fan to achieve instant heat dissipation for an environment and reduce ... | 11/06/2007 |
| 7282888 | AC fan motor driving circuit having detecting current wave capability A driving circuit of an AC fan motor has an AC to DC converter, a current detecting unit, a step-down divider, a motor driving unit, two windings each having many coils and a harmonic wave elimination unit. The AC to DC converter converts AC power to high voltage DC... | 10/16/2007 |
| 7268506 | Power window system The power window system moves a window glass in opening and closing directions in response to operation of an opening and closing instruction switch. The power window system includes a measurement device for obtaining an open degree of the window glass and a control... | 09/11/2007 |
| 7268514 | Motor control for stopping a load and detecting mechanical brake slippage A method and apparatus for stopping an AC motor that is controlling a load while detecting mechanical brake slippage of a mechanical brake for holding the load against movement includes a controller for decreasing torque-producing current commands from the drive whi... | 09/11/2007 |
| 7250737 | Motor control apparatus A motor control apparatus includes a detection device for detecting a rotation speed of a motor, a storing section for successively storing the rotation speed detected by the detection device, a calculation device for calculating a variation amount of the rotation s... | 07/31/2007 |
| 7227326 | System and method for transient-based motor speed estimation with transient excitation AC motor control systems and speed controllers are presented, including a transient-based speed estimation system that provides a rotor speed estimate based on a measured speed-related motor transient signal, and a transient excitation system which selectively modif... | 06/05/2007 |
| 7224138 | Method, system, and program product for feedback control of a target system utilizing imposition of a periodic modulating signal onto a command signal Feedback control of a target system is provided which utilizes the imposition of a periodic modulating signal onto a command signal of a controller. The command signal with the period modulating signal imposed thereon is input to the target system to be controlled. ... | 05/29/2007 |
| 7219575 | Adjustable pedal controller with obstruction detection An adjustable control pedal includes an upper arm, a lower arm, and a drive assembly operatively connected to the lower arm to selectively move the lower arm relative to the upper arm. The drive assembly includes a drive screw, a drive nut cooperating with the drive... | 05/22/2007 |
| 7218073 | Fan motor speed control circuit A fan motor speed control circuit is disclosed. The circuit includes a digital/analog converting unit and a driving unit. The digital/analog converting unit takes charge of receiving a pulse width modulation (PWM) signal and converting it into a voltage signal. The ... | 05/15/2007 |
| 7208902 | Digital speed controlling apparatus, digital motor controlling apparatus, paper conveying apparatus, digital speed control method, program for making computer execute this method, computer-readable recording medium, and imaging forming apparatus A digital speed controlling apparatus includes: a target speed calculator that calculates a target speed of a driven conveyor belt, based on a sampling time; a current speed calculator that calculates a current speed of the conveyor belt, based on displacement and a... | 04/24/2007 |
| 7208911 | Method for controlling a cycle-skipping control system including computer readable code and controller for performing such method A method, computer-readable code, and controller are provided for controlling a cycle-skipping control system having at least one cycle skipper connected to a multi-phase AC (alternating current) power source to drive a variable frequency load. A respective firing s... | 04/24/2007 |
| 7208907 | System and method of restarting a switched reluctance motor after a rapid cycling of power A system and method of restarting a switched reluctance motor after a cycling of power provided to the motor is provided that includes receiving at the motor a power-off signal followed by a power-on signal, determining a rotational speed of a rotor, and energizing ... | 04/24/2007 |
| 7208910 | Method for modifying baseline circuit architecture for a cycle-skipping control system including computer readable code and controller for performing such method A method, computer-readable code, and controller are provided for configuring a cycle-skipping control system having two or more cycle skippers connected to a common multi-phase AC (alternating current) power source to drive a variable frequency load. One or more ci... | 04/24/2007 |
| 7205738 | Method and apparatus for time-based dc motor commutation A motor control circuit uses a stored commutation table to effect time-based commutation of a brushless dc motor. Each entry in the commutation table defines a motor winding commutation state, and an exemplary method of open-loop motor control based on the commutati... | 04/17/2007 |
| 7205734 | Control device for vehicular opening/closing body A control device for a vehicular opening/closing body is provided with a duty ratio calculator (78), which calculates a duty ratio when power supplied to a door drive motor (48) allowing an opening/closing body to open/close is subjected to duty contro... | 04/17/2007 |
