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7623770 |
Fan control system
A fan control system includes a power source, a switch control circuit, a switch control signal delivering unit and a fan circuit module. The power source outputs a nominal power, the switch...
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7619380 |
Method and apparatus for controlling rotational speed of fan
An apparatus for controlling rotational speed of a fan includes a sensor module, a single chip microcomputer (SCM) module, and a driving module. The sensor module collects rotational speed signals...
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7619379 |
Motor control device and setting method thereof
A motor control device includes a recording module and a controlling module. The recording module has a revolution speed table recording a plurality of predetermined revolution speed values. The...
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7619378 |
Rotation control device, rotation control method and construction machine
A control device 50 of an electric rotary excavator generates a rotation speed coefficient in accordance with a setting condition of a fuel dial 13 and a selection condition of a mode selection...
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7615946 |
Fan speed control device
A fan speed control device includes a management selection module, a first and a second buffers, a resistor, a transistor, and a switch. Depending upon whether a motherboard supports a system of a...
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7613525 |
Disk device for serial communication and method of controlling the same
Embodiments of the invention provide a disk device and a method of controlling the device which is capable of suppressing peak current, even for serial communication, that is required when...
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7612508 |
System and method for communication with an information handling system cooling fan
An escape sequence coded in power commands from a system controller, such as a BMC, to a cooling fan controller directs the cooling fan to send identification information coded in tachometer...
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7602131 |
Voice coil motor control system and method using pulse width modulation
A system includes a current control module that supplies current to a voice coil motor during a first period to rotate an actuator arm in a first rotational direction, that discharges the current...
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7598690 |
Start-up circuit for DC fan
A start-up circuit which decreases a start-up current and stabilizes running of a DC fan. The start-up circuit includes a digital-analog converter for convert a digital control signal from a...
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7595598 |
Magnetizing motor and magnetizing method thereof
A magnetizing motor having a permanent magnet body covering an outer circumferential surface of a rotor body, includes a speed detecting unit that detects a speed of the magnetizing motor; and a...
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7580617 |
Electric fan device and method of driving electric fan device
An electric fan device includes a motor which drives an electric fan for a vehicle, a control switch which controls a motor current supplied to the motor, and a control unit which controls an...
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7576511 |
Motor control device and motor control method
The present invention employed a motor control device including: current sensors which detect currents in each phase of a three-phase motor; a coordinate conversion device which computes a d-axis...
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7576502 |
Method and apparatus for closing a powered closure of a vehicle
The apparatus for closing a closure of a vehicle comprises a closure driver for moving the closure and an electronic control unit electrically coupled to the closure driver. The electronic control...
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7573214 |
Method and apparatus for spindle motor control
Information indicative of the placement of spindle motor components may be obtained and used to provide a correction to one or more BEMF-derived attributes used to control the spindle speed. In...
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7548034 |
Centrifuge
A centrifuge including: a rotor rotating with a sample contained therein; a rotating shaft rotatably engaged with the rotor; a motor rotating the rotor and the rotating shaft; a belt transmitting...
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7545110 |
Motor drive control
A drive system for a multi-phase brushless motor comprises a single current sensor drive circuit, including switch means, switchable between a plurality of states. A controller is arranged to...
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7538509 |
Controlling the speed of cooling fans for multiple computer systems based on altitude/fluid density measurements from a centralized sensor
The present invention can include an automated method controlling the fan speed of computer system cooling fans with altitude and/or fluid density data from a centralized sensor. Such a method can...
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7538503 |
Hand-held power tool, in particular a trimmer or the like, having an electric drive motor
A hand-held power tool has an electric drive motor having a drive shaft and a tool connected to the drive shaft and rotatably driven by the drive shaft. The drive motor has a control device that...
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7535190 |
System and method for controlling a window wiper system
A windshield wiper system for use on a hybrid electric vehicle is capable of adjusting the delay between consecutive cycles based on engine state and vehicle speed. The system includes a windshield...
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7531978 |
System and method for controlling motion of electromechanical devices such as seats and opening elements of motor vehicles
A system for controlling a displacement drive of a motor vehicle includes a manually operable actuator movable over a fixed stroke between a first end position and a second end position. The...
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7518324 |
Universal motor speed controller
Moderately accurate closed loop speed control of a universal motor is attained without the need for any type of speed sensor. Motor armature (across the brushes) voltage is sensed and supplied to a...
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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...
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7514885 |
Methods and systems for medical imaging
Methods and systems for medical imaging are provided. The system includes a gantry assembly having a stator, a first rotor rotatably coupled to the stator, the first rotor configured to rotate...
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7505840 |
Method for controlling an electric pump drive motor of a power steering device
In a method for controlling an electric pump drive motor of a power steering device, a high output stage and a low output stage are provided, in which the motor can be operated. Between the two...
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7504792 |
Method of configuring a control unit of an actuator
A method of configuring a control unit (CPU) of an actuator (ACT) including a motor (MOT) for operating a movable element (COV) of a home automation equipment item (INST) of closure, privacy, sun...
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7501776 |
Apparatus for controlling high speed operation of motor and method thereof
An apparatus and method for controlling high speed operation of a motor for controlling high speed operation of a motor by estimating the position and the speed of the rotor of a synchronous motor...
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7495400 |
Apparatus and method for controlling temperature
A temperature control apparatus is suitable for use in devices such as consumer electronics devices having different thermal characteristics. According to an exemplary embodiment, the temperature...
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7489094 |
Method and apparatus for quiet fan speed control
An AC motor speed controller includes a plurality of capacitors that may be selectively switched, by means of controllably conductive switches, into series electrical connection with an AC motor...
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7479753 |
Fan speed controller
Embodiments of the present invention provide a low noise and high efficiency fan speed controller. The fan speed controller generates a pulse width modulation signal. The pulse width modulation...
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7477034 |
System and method for commutating a motor using back electromotive force signals
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...
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7477027 |
Method of removing foreign particles from heat transfer surfaces of heat sinks
An apparatus is provided and includes a power source, a system board on which an electrical component is installed, a heat sink including a plurality of heat transfer surfaces to contact the...
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7471649 |
Model train wireless bi-directional communication protocol
Methods and apparatuses implement a bi-directional model train communications protocol compatible with existing uni-directional communications protocols. In one specific embodiment, the existing...
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7471054 |
Method for detecting unbalanced conditions of a rotating load driven by a synchronous motor and for controlling said motor
The invention relates to a method for detecting unbalanced conditions of a rotating load driven by a synchronous electric motor ( 3 ) in washing machines ( 1 ) and similar rotably drum ( 2 )...
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7468590 |
Method and apparatus for initializing operation of a disk drive
A motor controller comprises an angular position module that determines an angular position of a disk. A spin-up module performs a spin-up of the disk. A ramp-up module ramps up a speed of the disk...
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7466095 |
Voice coil motor control system and method using pulse width modulation
A system and method for controlling an actuator includes a control module that communicates with a plurality of switching devices to generate current through a voice coil motor during a first time...
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7459870 |
Machine status interlock for reversing fan control
The air circulation fan associated with a radiator of some machines may include an automatic reversing purge cycle that is utilized to dislodge material from the radiator and/or intake screen of...
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7446500 |
Method for operating a programmable washing machine
In an anti-crease operation incorporated after the program sections wash and spin to loosen laundry in the drum, the user should be offered the possibility of being able to actively influence this...
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7443151 |
Fan speed controlling circuit
A fan speed controlling circuit includes a temperature sensing circuit for transforming a temperature signal to a voltage signal, a reference voltage providing circuit for outputting a reference...
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7427722 |
Power hand tool
A power hand tool includes a rotary adjustment knob for adjusting maximum output torque, which has a plurality of radial ribs, radial locating grooves alternatively arranged on the inner sidewall...
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7423392 |
Speed control for an electric linear actuator such as a trailer jack and the like
A trailer jack system includes an electric linear actuator having an electric motor, a source of electric power, and a controller that supplies a first voltage to the electric motor when the...
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7417389 |
Speed control for an electric motor
A system and method for controlling a rotational speed associated with a shaft or rotor of an electric motor comprises establishing a target rotational speed associated with a shaft or rotor of an...
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7414375 |
Fan voltage regulation control device
A fan voltage regulation control device includes a voltage regulation control unit for providing the power to a heat-dispersing fan, wherein the voltage regulation control unit is connected to a...
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7378815 |
Speed monitoring device
A device for redundant speed monitoring of a synchronous motor, which is sine-commutated without the use of sensors and which has a permanently magnetically excited rotor, has a first control unit,...
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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...
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7358695 |
Method for controlling fan
A method for controlling a fan is provided for adjusting the rotational speed of a fan. The method includes adjusting the rotational speed of the fan from a first mode value to a range of...
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7355359 |
Universal apparatus for driving diverse fans
A universal driving apparatus of a computer system, including a receptacle, a power switch, an integrator and a comparator, is provided to identify and drive a first fan and a second fan. The...
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7348743 |
Apparatus to remove foreign particles from heat transfer surfaces of heat sinks
An apparatus including a power source, a system board, coupled to the power source and disposed within the computer, on which an electrical component, which controls operations of the computer, is...
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7348742 |
Lighting fixture with synchronizable optical filter wheel and related method
A method of making an optical filter wheel of a device synchronizable with an internal, rotatable virtual reference wheel, created in a memory of a motor controller of the device, is disclosed. The...
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7348741 |
Method and device for controlling fan for cooling vehicle-mounted battery
A vehicle which uses an internal combustion engine and a motor generator as drive sources is provided with a battery disposed under a seat and a fan for cooling the battery. Power is exchanged...
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7323839 |
Direct current motor controlling method
A direct current motor controlling method includes a mean for transforming a duty signal to computed value by a microprocessor unit. The microprocessor unit computes the computed value and then...
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