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8743502 Disk drive spinning down disk to a spin rate based on spin-up parameter  
A disk drive comprising a head actuated over a disk, and control circuitry operable to spin the disk at a first spin rate. The control circuitry is further operable to reduce the spin rate of the...
8729837 Automatic door with position-dependent force limiting  
A method of controlling the motion of a moveable door includes determining the direction that the door is moving with respect to its anticipated closed position, and based on the direction,...
8669725 Fan control system capable of modulating a rotational speed of a fan and method thereof  
A fan control system includes a host device including a detecting unit for detecting a component so as to generate a detecting signal. The host device further includes BIOS for storing relationship...
8629640 Integrated fan drive system for air-cooled heat exchangers (ACHE)  
An air-cooled heat exchanger (ACHE) for cooling process fluids used in an industrial process. In one embodiment, the ACHE is configured as a forced-draft ACHE. A support structure supports the...
8610389 Speed control apparatus for the switched reluctance motor  
Disclosed here is a speed control apparatus for a switched reluctance motor (SRM) including: a current control unit generating command currents for each period; a driving unit generating a pulse...
8606429 System and method for controlling an electronic device fan  
An electronic device and a method for controlling fan speed of the electronic device include setting a speed range corresponding to a variety of pulse-width modulation (PWM) duty cycles of the fan,...
8598823 Integrated fan drive system for cooling tower  
A drive system for driving a fan in a wet cooling tower, wherein the fan has a fan hub and fan blades attached to the fan hub. The drive system has a high-torque, low speed permanent magnet motor...
8570003 Double fed induction generator converter and method for suppressing transient in deactivation of crowbar circuit for grid fault ridethrough  
A double fed induction generator (DFIG) system and controller are presented in which the rotor side converter is preloaded with one or more initial values for resuming regulated operation to...
8531142 Bi-power motor controlling apparatus  
A bi-power motor controlling apparatus, which is electrically connected with a motor, includes a driver IC having a first pin and a second pin. The first and second pins are used to receive a first...
8525452 Counter electro-motoric force based functional status detection of an electro-motor  
The present invention relates to a circuit for detecting a functional status of an electro-motor. Typical electro-motors need additional components to identify the functional status of the motor....
8527095 Cooling system and control method of cooling system  
A cooling system constructed to cool down an accumulator mounted on a motor vehicle is herein presented. The cooling system sequentially controls an air blower to restrict the air blow to the...
8519857 Systems and methods of controlling a fan in an electronic system  
Systems and methods of controlling a fan in an electronic system are disclosed. One example method includes obtaining a control setting of the fan and current speed of the fan. The example method...
8513908 Fan speed control circuit  
A fan speed control circuit includes a first fan, a second fan, a first temperature sensor, a second temperature sensor, a PWM regulator, and a driving module. The first temperature sensor senses a...
8508182 Electrically connecting blower to power supply stage providing higher voltage  
An alternating current-to-direct current (AC-to-DC) power supply has a first stage providing a first DC voltage and a second stage providing a second DC voltage. The AC-to-DC power supply has a...
8502483 Model train remote control system having realistic speed and special effects control  
The model train control system includes a remote control device that receives user input with respect to various train functions such as desired speed and effects, and that generates commands based...
8493007 Method for ascertaining measured values in a cyclically controlled system  
A method for ascertaining measured values in a cyclically controlled system, the cyclic control having control time periods in which the system is controlled, and no-control time periods in which...
8494861 Movable barrier control system component with audible speech output apparatus and method  
An automated movable barrier control system component (11) as comprises a part of a movable barrier control system (10) has an audible speech output device (21) operably coupled thereto. These...
8487574 Fan rotary speed controlling device  
A fan rotary speed controlling device includes a base voltage generating circuit, a first voltage generating circuit, a second voltage generating circuit and a compensation controlling circuit. The...
8487561 Softstarter device and method to control the softstarting of an electric motor  
A self-adapting soft-starter device includes an electric current limiter limiting electric current supplied to the motor to a preset maximum current limit, a ramp-up time determiner determining the...
8436713 Door drive  
The present invention relates to a door drive, in particular a garage door drive, with a door control and with a programming unit for programming the door control during operation and/or...
8436566 Multi-speed control apparatus for fan motor  
Disclosed is a multi-speed control apparatus for a fan motor. The apparatus includes a driving member, a motor speed sensing member, a resistor circuit, a voltage-division resistor, and a...
8427085 Speed adjustment circuit for a plurality of fans  
A speed adjustment circuit for a plurality of fans includes a voltage input terminal, a plurality of speed control modules, and a fan tachometer. Each of the speed control modules includes a fan...
8421383 Rotation control circuit of fan  
A rotation control circuit comprises a motor-driving unit and a rotation-switching unit. The motor-driving unit is coupled to a motor of a fan. The rotation-switching unit is coupled to the...
8421382 Apparatus motor control method  
A method for controlling a motor can suppress an influence of speed variation due to cogging of the motor. The method includes performing a preliminary drive process to output a first driving...
8415907 Motor control method  
A motor control apparatus and a motor control method determine whether the motor is in a back-pressure area so as to provide different rotation-speed control signals. When the fan is in the low...
8400083 Current detecting device, air conditioning apparatus, correction constant calculating system and correction constant calculating method  
A current detecting device includes a current leveling unit, a first wire and a current detecting unit. The current leveling unit is configured to level a drive current that is passed through a...
8350512 Electric power tool  
An electric power tool is provided that includes a motor as a driving source, a first operation switch, a first semiconductor switch, and a second semiconductor switch. The first operation switch...
8344682 Method and apparatus for failsafe monitoring of a movement variable on an electrical drive  
A first and a second drive current for an electrical drive are generated as a function of a nominal value for a movement variable, such as drive torque or rotational speed. An alternating magnetic...
8344678 Servomotor control system and servomotor unit  
A servomotor control system includes: an integrated control unit for integrally controlling servomotors; and servomotor units coupled with the integrated control unit and the servomotors. Each...
8330586 Systems and methods for programming of a cooling fan via a serial port communication mode  
Embodiments of the present disclosure provide a method that comprises, based upon receipt of a mode command, changing an operating mode of a fan motor controller of a fan to a serial port...
8319460 Method and system for initiating operation of an electric motor  
Methods and systems for controlling an electric motor are provided. The motor includes a plurality of windings. Each winding is coupled to a respective set of first and second switches. The first...
8319457 Energy recovery device in a variable-frequency drive  
A variable-frequency drive that includes a DC power supply bus with a positive line and a negative line, and an inverter module powered by the DC bus for supplying a variable voltage to an electric...
8308441 Robust PID control for BLDC motor controller  
When controlling an air compressor (13) for a pneumatic braking system on a large hybrid commercial vehicle (e.g., a bus, a package delivery truck, etc.), PID control of an air compressor motor...
8292593 System for minimizing mechanical and acoustical fan noise coupling  
A system and method of spread-spectrum fan control for an air-cooled system is provided for reducing the vibrational and acoustical noise associated with the air-cooled system. The method includes...
8294396 Compact FPGA-based digital motor controller  
A compact field programmable gate array (FPGA)-based digital motor controller (102), a method, and a design structure are provided. The compact FPGA-based digital motor controller (102) includes a...
8274248 Rotation speed detection circuit and motor driver apparatus having the same  
A rotation speed detection circuit includes an internal clock generation portion which receives an input of a period signal whose period varies in accordance with rotation speed of a motor and...
8269438 Apparatus for driving motor of air conditioner and method for driving the same  
An apparatus and method for driving a motor of an air conditioner are disclosed. A method for driving a motor of an air conditioner includes driving the motor in response to a predetermined speed...
8269450 Winding switching apparatus and winding switching system  
A winding switching apparatus includes a winding switching device and a drive circuit. The winding switching device is configured to switch a plurality of windings of an AC motor. The drive circuit...
8264176 Fan arrangement  
A fan arrangement (20) has a fan (24) driven by an electric motor (22), also an apparatus for detecting the electrical power (PIST) consumed by the electric motor (22) during operation; an input...
8258726 Battery cooling system for vehicle  
A system for cooling a battery mounted on a vehicle using air within a vehicle, independently of the travelling state of the vehicle. The air within a vehicle compartment is guided to a battery...
8217604 Apparatus motor control method  
A method for controlling a motor can suppress an influence of speed variation due to cogging of the motor. The method includes performing a preliminary drive process to output a first driving...
8207696 Transfer characteristic based motor speed control  
A system includes a speed control module, a repeatable component measuring module, and a repeatable component correcting module. The speed control module controls a speed of a motor based on an...
8198838 Circuit for controlling rotation speed of computer fan  
A circuit for controlling a rotation speed of a computer fan includes a control chip, a conversion circuit, a fan header, a first switch, and a second switch. When a first terminal of the first...
8193744 Method and apparatus for quiet fan speed control  
A method for controlling the speed of an AC motor by means of an AC motor speed control having a plurality of capacitors operable to be selectively coupled in parallel electrical connection, the...
8193746 Automotive electric motor speed control system  
An automotive electric motor speed control system may include at least one electric motor adapted to cause a moveable element to move, a DC/DC power converter configured to output a voltage to the...
8193745 Filtering and boosting a signal from a drive circuit  
A method and apparatus comprises a filter receiving an input voltage signal from a drive circuit, and a filter producing an output voltage signal with reduced resonance and transients. The...
8188698 Integrated fan drive system for air-cooled heat exchanger (ACHE)  
An integrated fan drive system for air-cooled heat exchangers. The integrated fan drive system has a high-torque, low speed permanent magnet motor having a rotatable shaft, a fan that is directly...
8188691 Decoy apparatus  
The present disclosure is an apparatus for controlling movement of a decoy. The apparatus for controlling movement of a decoy may include a motor and a housing. The motor may cause movement of a...
8174215 Motor speed controller  
In a motor speed controller, feedback control is implemented at a gain independent of the target rotational speed ωT while the increase in the circuit size or processing load is reduced. The ...
8174214 Three-phase low-loss rectifier with active gate drive  
A three-phase bridge rectifier circuit (BRC) connectable to an AC voltage source (ACVS) via input lines (151, 153, 155) and a load (109) via output lines (157, 159). ACVS (102, 104, 106) supplies...
Matches 1 - 50 out of 358 1 2 3 4 5 6 7 8 >