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| Number | Title | Issue Date |
| 8368329 | Method and apparatus for improved cooling fans Methods and apparatuses for improving cooling fan operation are disclosed. In one embodiment, a cooling fan's speed is maximized by adjusting a PWM signal driving the fan to change the switching point of the fan motor. In another embodiment, a method for starting a ... | 02/05/2013 |
| 7710055 | DC motor variable kick-start A method of operating a direct current motor fan assembly is provided in which a motor controller operates to apply full power to kick-start a motor to overcome static forces. As soon as a sensor determines that the motor has begun to rotate, the motor controller ch... | 05/04/2010 |
| 7482771 | Method for monitoring a drive device for a standstill condition, monitoring system therefore, and drive system therefore In a method for monitoring a stationary condition of a drive device, a monitoring device provides the drive device with a temporally varying monitoring signal which, when a sensor device connected to the drive device functions properly, modulates a sensor output sig... | 01/27/2009 |
| 7479747 | Storage device and motor control device In a storage device, a BEMF control is not performed on a motor and the motor is stopped if the motor is in a BEMF-control possible state. Once the motor has completely stopped, a start-up control is performed on the motor. ... | 01/20/2009 |
| 7443123 | Method and apparatus for preventing overheating in an electronically commutated motor assembly A control circuit for a motor includes a voltage regulator having a thermal shutdown apparatus that turns off the voltage regulator when the temperature of the control circuit rises above a pre-determined threshold level, wherein the voltage regulator is used to pro... | 10/28/2008 |
| 7372228 | Electric power tool with memory capability The invention relates to an electric power tool having a control and/or regulating device for an electric motor. It is provided that the control and/or regulating device (4) is assigned an electronic memory element (5) for at least one operating state ... | 05/13/2008 |
| 7372224 | System and method for determining barrier motor parameters without using sensors A barrier operator comprises a first measuring apparatus for measuring a current used by a direct current (dc) motor to move a barrier and a second measuring apparatus for measuring a generated voltage of the dc motor. A controller is coupled to the first measuring ... | 05/13/2008 |
| 7358690 | Motor control apparatus In a motor control apparatus in which a higher voltage is directly applied to a driving unit for a motor from a battery and a lower voltage stepped down by a switching regulator from the battery is also supplied to a control unit, the switching regulator is started ... | 04/15/2008 |
| 7334648 | Rotary impact power tool A impact power tool includes a motor rotating a drive shaft, an output shaft holding a tool bit, and a hammer coupled to the drive shaft. The hammer is rotatable together with the drive shaft and is engageable with an anvil fixed to the output shaft so as to give a ... | 02/26/2008 |
| 7318485 | Method of Controlling the direction of rotation of a power tool The invention discloses a power tool for screwing or drilling having a motor for driving a drive shaft, a controller for controlling the power tool, a motor switch for switching the motor on and off, switch for reversing the power tool between clockwise and counter-... | 01/15/2008 |
| 7228883 | Motorized barrier operator system utilizing multiple photo-eye safety system and methods for installing and using the same A movable barrier operator system includes a motorized operator which moves a barrier between limit positions, and a photo-electric safety system connected to the motorized operator. The photo-electric safety system monitors for obstructions at more than one height ... | 06/12/2007 |
| 7227712 | Disk drive apparatus and method of mounting same A disk drive apparatus mounting socket includes a socket portion which supports a disk drive apparatus, a lead portion which is connected to the disk drive apparatus supported by the socket portion, and a terminal unit which is electrically connected to the lead por... | 06/05/2007 |
| 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 |
| 7199546 | Motor stop control device utilizable for gaming machine and gaming machine using the same It is disclosed the motor stop control device having the stepping motor 49 as the drive source of the reel 3 on which a plurality of symbols are formed, the motor stop control device being utilized in the reel-type gaming machine 1 and stopping ... | 04/03/2007 |
| 7170249 | Electrical phase compensation in BEMF spindle motor control A method and apparatus for compensating for the asymmetrical phases of a spindle motor in a disc drive are provided. With the apparatus and method, compensation values are learned by sampling speed data during a period of operation of the disc drive where the speed ... | 01/30/2007 |
| 7122986 | Motor operator system for a power switch A motor and a rotary potentiometer, or other position sensor, running on the motor shaft are mounted in a first enclosure with an output shaft for driving a power switch open or closed. A part of the system outside the first enclosure makes use of a motor position s... | 10/17/2006 |
| 7102309 | Apparatus for compensating for speed error of motor The present invention discloses an apparatus for compensating for a speed error of a motor which can reduce a speed ripple of the motor resulting from load characteristics, and which also can reduce vibrations and noises. The apparatus for compensating for the speed... | 09/05/2006 |
| 7091683 | Method of monitoring and controlling the seating of screws to the optimum point of grip independent of screw size and material density A method of controlling a motor (106) used to drive a screwdriver bit (105) such that screws (107) are seated to the optimum point of grip between the screw (107) and the work piece material. An electronic control circuit controls the spe... | 08/15/2006 |
| 7084592 | Method and apparatus for controlling a DC motor by counting current pulses A system includes a motor for producing motion when current is supplied to the motor and a motor controller coupled to the motor for receiving a motor current signal indicative of the current supplied to the motor. The motor controller has an analog-to-digital conve... | 08/01/2006 |
| 7079459 | System and method for performing a spin motor startup operation A system and method for controlling operation of a motor system that addresses the design challenges for the small form factor optical disk system. The present invention includes starting the operation of a motor including windings and a rotor; placing the motor in ... | 07/18/2006 |
| 7061194 | Method and apparatus for controlling constant linear velocity of spindle motor using mirror signal A method and an apparatus for precisely controlling the rotation speed of a spindle motor in an optical system according to a given condition are provided. The method involves counting in response to a clock signal widths of first and second logic states of an input... | 06/13/2006 |
| 7042668 | Method and apparatus for generating an index location from a spin motor of a disk drive A method and apparatus for generating an index location from a spin motor of a disk drive are disclosed. A disk drive includes a motor having a plurality of commutation states, wherein changes in commutation states are controlled by an FCOM signal having FCOM pulses... | 05/09/2006 |
| 7019475 | Motor stop control device for gaming machine and gaming machine provided with the motor stop control device The present invention can accurately stop a reel at a target position and, at the same time, can offer a wide variety of reel stop process. A motor stop control device includes a stepping motor 70 having two pair of excitation phases as a drive source of a re... | 03/28/2006 |
| 7012391 | Motor acceleration using continuous sequence of current limit values Method and apparatus for accelerating a motor to an operational velocity using a continuous sequence of current limit values derived from a plurality of discrete current limit values. Each discrete current limit value establishes a maximum current magnitude for the ... | 03/14/2006 |
| 6973535 | Digital device configuration and method An electromechanical data storage arrangement is interfaced with a host. The interface may include a conductor that carries read and write gate signals. Another conductor carries both a servo sync mark and an error signal. The storage arrangement includes an externa... | 12/06/2005 |
| 6971454 | Pulsed rotation screw removal and insertion device A drill/driver (e.g. an electric drill) with a screwdriver bit attachment, and a method of controlling the drill/driver, are described. This method of control will greatly reduce the occurrence of stripped screw heads on most types of screws. By periodically stoppin... | 12/06/2005 |
| 6954048 | Apparatus for monitoring electric motor screw driver system A driver monitor for a driver system. A driver monitor includes a driver monitoring unit for monitoring the fastening operation of the driver based on pre-determined fastening information. A rotation start signal and a rotation stop signal are used to determine whet... | 10/11/2005 |
| 6936983 | Motor vehicle door lock with an electromechanical central locking system drive A motor vehicle door lock with an electromechanical central locking system drive (1) and a mechanical central locking system element (2) driven by it, the central locking system drive (1) having an electric drive motor (3) and a motor con... | 08/30/2005 |
| 6923268 | Electric rotational tool driving switch system An electric or power rotational tool including a driving switch of a push operating system that switches the electric motor ON when the rotational tool contacts a work object such as a screw, etc. and is displaced by being pressed, and a driving switch of a lever op... | 08/02/2005 |
| 6922031 | Door actuation system with helical cable A door actuation system conducts or assists movement of sliding vehicle doors by connecting the door to a bi-directional motor via one or more helical cables that engage with gearing on the bi-directional motor. Rotation of the motor in either direction pushes or pu... | 07/26/2005 |
| 6909253 | Rotation speed control apparatus of open close body for vehicle and rotation speed control method of the same A controller PWM control an opening and closing motor (16) of an opening and closing means, increases a duty ratio of the PWM control according to a given increasing rate just after starting the opening and closing motor (16), reducing the duty ratio t... | 06/21/2005 |
| 6906493 | Electronic brake for motor In an electronic system, motor braking is accomplished by applying direct current (DC) voltage, developed across a capacitive element during a run mode operation, across terminals of an alternating current (AC) or an induction motor. While the motor is ON, i.e. duri... | 06/14/2005 |
| 6901704 | Vehicle rear gate opening and closing apparatus A rear gate opening and closing apparatus includes a gas stay for biasing a rear gate in an opening direction, a motor for actuating to open or close the rear gate, a clutch for connecting or disconnecting the motor with the rear gate, an encoder for detecting the p... | 06/07/2005 |
| 6748162 | Ventilation system for a motor vehicle A ventilation assembly for a motor vehicle comprising first and second motor fan units (1, 2) and a control device (5) adapted to vary the ventilation power (P1+2) developed by the assembly formed by the two motor fan units according to a de... | 06/08/2004 |
| 6737828 | Washing machine motor drive device A washing machine motor drive device drives a motor using an inverter circuit, which implements a constant torque control through a change in the torque-revolution speed characteristic of the motor. This facilitates an easy control of braking torque (negative torque... | 05/18/2004 |
| 6555979 | System and method for controlling electrical current flow as a function of detected sound volume A system and method for selectively controlling an electrical component is claimed. The system contains an audio detector, such as a microphone, that receives sound energy and converts the sound energy into a corresponding electrical signal. The content o... | 04/29/2003 |
| 6538412 | Method for controlling a power drive system To minimize the energy required for operation of a rail vehicle, in a drive system that has an intermediate circuit converter 1 and a three-phase motor 7 fed by it, the intermediate circuit voltage in the intermediate circuit 12 and/or the magnetic flux i... | 03/25/2003 |
| 6462493 | Driving control apparatus of motorized scooter The present invention herein relates to a driving control apparatus of motorized scooter comprised of battery, driving unit, and motor, characterized in which the driving unit consists of at least a relay, a start-up and protective circuit, an under-volta... | 10/08/2002 |
| 6456025 | Motor operator for over-head air break electrical power distribution switches A motor operator for an overhead power switch is disclosed including a microcontroller, a unique and powerful array of well-integrated sensors, a motor and drive developing substantial torque and speed and coupled to a switch actuator and responsive to th... | 09/24/2002 |
| 6337553 | Circuit arrangement and method for operating and electrical motor A circuit arrangement with a digital controller for operating an electric motor and a method for starting an electric motor are disclosed. Electric motors require a considerably higher current immediately after they have been switched on and during the ru... | 01/08/2002 |
