Matches 1 - 43 out of 43


Match Document Document Title
US20080260363 Method of Controlling a Motorized Window Treatment  
A method of controlling a motorized window treatment provides for continued operation of the motorized window treatment during an overload or low-line condition. The motorized window treatment is...
US20080138049 METHOD AND SYSTEM FOR LOW SPEED CONTROL OF A VIDEO SURVEILLANCE SYSTEM MOTOR  
The present invention provides a method and system that improve the low-speed control stability of a video camera assembly, including a video camera, a tilt motor operable to tilt the video camera...
US20120229067 VOLTAGE REGULATOR FOR DC MOTORS  
A voltage regulator for a pair of electric motors has an input for a signal indicative of the desired speed for the motors and a pulse width modulation control circuit device. A control module...
US20080131099 ELECTRIC MOTOR CONTROLLER WITH BRUSH POSITION DETECTOR  
Provided are a method, computer-readable medium, and system for automatically determining a proper operational current input to an electric motor. In an exemplary embodiment, a method for...
US20090060477 FOOD WASTE DISPOSER WITH PWM BASED CONTROL OF GRINDING PROFILE  
A food waste disposer has a motor driven with pulse width modulation (“PWM”). A grinding profile is controlled based on PWM values of the PWM controller driving the motor. In an aspect,...
US20080317445 Motor Speed Control Circuit  
A motor speed control circuit includes: a voltage generating circuit configured to output a reference voltage corresponding to a target rotation speed of a motor and a speed voltage corresponding...
US20100270961 Method and Device for Controlling an Electric Motor ( amended  
A method and a device for controlling and/or regulating an electric motor. Such electric motors are used for example in motor vehicles in the form of pump motors. In general, the electric motor is...
US20070098373 Dc motor drive unit  
In a DC motor drive unit having an open loop control system, a judgment is made as to whether an externally supplied speed instruction data instructs driving of the DC motor or not, based on the...
US20090324205 PULSE COUNT CONTROL FOR BRUSHED DC MOTOR DRIVEN BY PULSE WIDTH MODULATION  
Systems and methods for determining the occurrences of pulses for implementing a pulse count monitoring method for driving a brushed DC motor driven by a pulse width modulated (PWM) driving...
US20090190904 Optimized Determination of the After-Run Voltage in DC Motors  
A device and a method are provided for determining the after-run voltage of a direct current motor which is operated via cycled control. In normal operation the direct current motor is controlled...
US20090162039 CIRCUIT FOR CONTROLLING ROTATION SPEED OF COMPUTER FAN  
A circuit for controlling rotation speed of a computer fan includes a fan connector providing for controlling the rotation speed of the computer fan, a rotation speed detector providing for...
US20090218968 CONTROL SYSTEM FOR CONTROLLING MOTORS FOR HEATING, VENTILATION AND AIR CONDITIONING OR PUMP  
The present invention discloses a control system for controlling a motor for a heating, ventilation and air conditioning (HVAC) or a pump comprising: an opto-isolated speed command signal...
US20080298784 Method of Sensing Speed of Electric Motors and Generators  
A method and circuit for determining the speed and/or counting the revolutions of brush and commutator motors is described. The method and circuitry detects signals present on the windings of the...
US20110037303 METHOD AND SYSTEM FOR VARYING A SPEED OF A MOTOR USING A BI-DIRECTIONAL DEFLECTABLE RESISTOR  
An electronic switch for controlling a motor. The switch includes at least one deflectable resistor including a substrate having a first configuration. The substrate being bendable to a second...
US20080130134 Voice Coil Motor Control Device and Method of Driving the Same, Image Pickup Device  
The present invention provides a control device capable of improving hysteresis characteristics of a voice coil motor (31) and attaining a suitable lens position without complicating the structure...
US20090003806 Method and circuit for controlling rotation speed of computer fan  
An exemplary method for controlling rotation speed of a computer fan includes: judging the type of a fan by comparing two rotation speeds detected before and after changing a duty cycle of a PWM...
US20090154905 Single Output H-Bridge Drive  
Disclosed is a drive circuit for generating the drive current used to energize the windings of a motor. The drive circuit includes a data processing unit that produces two outputs used to control...
US20090169188 Apparatus and method for fan auto-detection  
An apparatus for detecting a type of fan and controlling the fan, the fan providing during operation a tachometer signal indicating a speed of the fan, the apparatus includes: a direct current...
US20070133955 Fan Speed Control Circuit Simultaneously Controlled By Temperature And PWM  
A speed control circuit of a fan motor simultaneously controlled by temperature and PWM signals is provided. The PWM signals are received by a PWM control circuit, which sends a PWM control signal...
US20080231218 APPARATUS AND METHOD OF DRIVING MOTOR, AND DRIVE APPARATUS USING THE SAME  
An open-loop driving method of a spindle motor includes determining of whether open-loop driving conditions for the spindle motor are met, and adjusting widths of driving pulses applied to the...
US20070025707 Driving apparatus for fan motor  
A driving apparatus for fan motors, electrically connected between a pulse width modulation (PWM) signal generator and a controller, includes a converter electrically connected to the PWM signal...
US20100278518 MEASURING PRESSURE  
A method and apparatus are disclosed for determining a negative pressure generated by a suction pump of a topical negative pressure (TNP) system. The method includes the steps of disconnecting a...
US20090041440 Document reading apparatus, document reading method, and program for reading document  
The invention provides, as an aspect thereof, an document reading apparatus that includes: a speed calculating unit that calculates a speed related to the rotation of a motor on the basis of a...
US20080265825 High-Current High-Resolution Driving Circuit  
The present invention discloses a high-current high-resolution driving circuit comprising a controller, a digital-to-analog converter and a voltage-to-current converter. The controller is provided...
US20090310948 REGULATING DEVICE FOR REGULATING THE VOLTAGE ON A HIGH-SIDE LOAD  
The invention to an electronic control system, controlled by a pulse width-modulated signal (SG) related to earth, for regulating the voltage (Umot) across a high-side load (M), in particular a...
US20080069547 MOTOR CONTROL METHOD AND MOTOR CONTROLLER  
The present invention provides a motor control method and a motor controller. In the motor control method and the motor controller according to the present invention, even when production...
US20080112695 Motor drive apparatus and method  
If a PWM duty instruction D1 determined by a duty calculation circuit exceeds an upper limit value, a duty signal processing circuit in a motor drive apparatus divides a switching current supply...
US20080247734 MOTOR DRIVING CIRCUIT  
A motor driving circuit drives a motor on receipt of an error signal having a digital value corresponding to a deviation between a current rotation speed of the motor, which is the subject to be...
US20100027979 MOTOR CONTROLLER AND ELECTRIC POWER TOOL HAVING THE SAME  
A motor controller is provided with a velocity processing unit that determines a corrected target rotation velocity by correcting the inputted target rotation velocity of the motor in accordance...
US20070098374 Information processing apparatus and fan control method  
According to one embodiment, an information processing apparatus includes a main body, a fan which is provided in the main body and is driven by a pulse width modulation signal (PWM signal), and a...
US20080292290 MOTOR CONTROL METHOD AND APPARATUS THEREOF  
A motor controlling method and apparatus thereof are provided. The control method includes the steps of receiving a switching phase signal of coil while the motor is rotating, for generating a...
US20110262112 Rotation detecting apparatus and rotation detecting system  
A rotation detecting apparatus for detecting a rotational state of a direct-current motor includes a driving device, a control device, an energization detecting device, an alternating-current...
US20080292291 MOTOR CONTROL METHOD AND DEVICE THEREOF  
A motor control method and a motor control device are provided. The control method includes the steps of receiving a current feedback signal from a coil switching circuit, while the motor is...
US20080226266 Control Apparatus for and Control Method of Controlling Motor for Vehicle  
The present invention is aimed at provision of a control apparatus for and a control method of controlling a motor for a vehicle driven by a driving circuit that operates according to a pulse...
US20090309527 METHOD AND SYSTEM FOR DYNAMIC MOTOR BRAKING  
A method of dynamic motor braking is disclosed herein. The method comprises: dissipating reverse energy in a motor within motor windings during a non-current supplying period of a commutation...
US20090001916 MOTOR CONTROLLING DEVICE AND METHOD TEHREOF  
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...
US20080152325 Apparatus and method for controlling BLDC motor  
Disclosed are an apparatus and a method of controlling a BLDC motor, including a controller to determine whether the PWM duty of the BLDC motor in driving is desirable, and performing compensation...
US20090129760 Method and device for controlling a heat-dissipating fan for an electronic component  
A method for controlling a heat-dissipating fan for an electronic component includes the steps of: detecting a temperature of the electronic component, and outputting a first control signal...
US20080219649 MOTOR DRIVE DEVICE AND ELECTRIC APPARATUS USING THE SAME  
A motor drive device of the present invention includes: an output circuit provided with a switch element connected to a motor; a PWM signal generating circuit for generating a PWM signal having a...
US20100329724 MOTOR CONTROL APPARATUS AND IMAGE FORMING APPARATUS  
A motor control apparatus that controls a DC motor includes a detection unit configured to detect angular speed of the DC motor, a driven member configured to be driven by the DC motor, and a...
US20100220982 MOTOR CONTROL APPARATUS AND IMAGE FORMING APPARATUS  
A motor control apparatus for controlling a DC motor includes a detection unit configured to detect an angular speed of the DC motor, and a control unit configured to, when the DC motor is...
US20160065104 Sensorless DC Fan Speed Controller  
A method of maintaining a calibrated DC fan motor is provided in which normal operation of the motor is periodically and temporarily suspended in order to calibrate the motor. During normal...
US20150333675 METHODS AND SYSTEMS TO IMPROVE DC MOTOR COOLING FAN EFFICIENCY WITH PULSE WIDTH MODULATION FREQUENCY VARIATION  
Methods, systems and a vehicle are provided for. The method provides for controlling pulse width modulation by a transistor based on the speed of a motor and a transfer function. The system...

Matches 1 - 43 out of 43