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US20130251352 WIPER DEVICE  
A wiper device that includes: a wiper motor that swings a wiper blade that is coupled to the wiper motor through a wiper arm to-and-fro over a window pane between an upper return position and a...
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...
US20110044669 CIRCUIT FOR CONTROLLING A NUMBER OF MOTORS  
The invention relates to a circuit for controlling a number of DC motors (M1, M2) capable of being controlled independently of one another, comprising, for each motor (M1, M2), an H-bridge (1A,...
US20060056822 Brushless direct current motor and driver thereof  
A brushless direct current motor. The brushless direct current motor comprises a rotor, a stator, and a driver. The rotor comprises magnetic poles. The stator is enclosed by or enclosing the...
US20060024035 Control system of transfering pulse width moldulation for a cooling fan motor  
A control system of transferring pulse width modulation for a cooling fan motor includes an input end of pulse width modulation, a transfer unit, a transfer unit and a drive circuit. The input end...
US20100071142 2-SPEED TOOTHBRUSH  
A circuit for varying the speed of a variable speed motor having a power source to provide a voltage to the motor and a diode as a means to provide a voltage drop within the circuit that is...
US20080096482 FAN CONTROLLER  
A fan control system includes a main fan controller and at least one auxiliary fan controller. The main fan controller has circuitry for running a fan on a preset cycle, the preset cycle having a...
US20090263110 Soft start motor control using back-EMF  
A method of controlling in-rush current to a DC motor is disclosed. The method may include operating the DC motor in a first mode including applying back-EMF across a relay coil to maintain the...
US20090096398 ROBUST BLOWER MOTOR STARTUP TECHNIQUE  
A method for starting a blower motor with a locked rotor condition, the motor having one or more speed settings, each speed setting having a reference voltage and reference current value...
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...
US20120126547 DC MOTOR ASSEMBLY WITH SOFT STARTING CAPABILITY  
A DC motor assembly (10) with soft starting capability is provided. The assembly (10) comprises a DC motor (12) including an armature (14) and a field winding (16) adapted to be excited separately...
US20080124226 ENERGY-CONSERVING VENTILATING FAN  
An electrically driven fan arrangement, suitable for energy-conserving installations, includes a fan, an electric motor (110) serving to drive the fan, and associated control apparatus, namely: a...
US20090304368 COMMUTATOR MOTOR COMPRISING A DEVICE FOR CONTROLLING THE ANGULAR POSITION AND ROTATIONAL SPEED OF THE ARMATURE THEREOF  
An electric commutator motor comprising a housing and a shaft which is solidly connected to a rotor. The housing comprises a stator and supply brushes which can be connected to an electric power...
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...
US20090304369 DRIVE AND EVALUATION UNIT  
The invention relates to a drive and evaluation unit for displacing an object to be displaced, particularly for raising and lowering a side window in a motor vehicle. The drive includes a...
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,...
US20110033322 ELECTRICAL MOTOR ACTIVATION METHOD HAVING LOAD TORQUE ADAPTATION  
An electrical motor activation method for an electric motor including a rotor, connected to a motor shaft, and a stator having brushes. The stator comprises multiple commutator laminations for the...
US20130209074 CONTROL SYSTEM FOR A STRAIGHT SLOT DIRECT CURRENT MOTOR ACTUATOR  
A control system for an actuator including a straight slot direct current motor comprises a position sensor for measuring the angular position (θ) of the motor and a current sensor for measuring...
US20120119601 MOTOR WITH SPEED REDUCTION MECHANISM  
In a brush holder accommodating part 26d of a gear housing 26, paired flat surface parts 26c and paired curved parts 26b are alternately disposed so as to be formed into an elliptical shape, one...
US20080116753 APPLIANCES WITH BRUSHLESS MOTORS  
A portable electric appliance (1, 23) such as a hand held hair dryer uses a brushless electric motor (13, 25) in combination with a secondary fan assembly (14) and/or an air scoop (24) to redirect...
US20080019677 Motor Drive Circuit and Electronics  
A drive circuit drives a motor in a mode selected from first and second modes. A drive unit operates in response to a control signal received from a signal generation unit to control how the motor...
US20090060479 BUCK CONVERTER WITH IMPROVED FILTER DESIGN  
A buck converter for use in controlling a motor in accordance with an embodiment of the present invention includes a power input operable for connection to a DC power supply, a switch for...
US20080075440 Fan system and protecting device thereof  
A protecting device of a fan system includes at least one first switch element and at least one control unit. The first switch element receives a first input signal. The control unit is...
US20090190903 MOTOR CONTROLLER AND VEHICULAR STEERING SYSTEM USING SAID MOTOR CONTROLLER  
A low speed region position estimating portion is designed to be suitable for when the motor is operating in a low speed region, and estimates a low speed estimated rotational position θ̂L. A high...
US20050063684 Speed controlling method for an electric motor, control circuit and electric motor  
The invention relates to a method for controlling the speed and/or the position of an electric motor, comprising the steps of generating a first digitally pulsed signal, whose frequency represents...
US20100014843 FAN CONTROLLING CIRCUIT  
A fan controlling circuit for detecting rotational speed of a fan, includes a comparison circuit and a controlling chipset. The comparison circuit receives a rotational speed signal from the fan...
US20090175601 MOTOR CONTROLLER AND MOTOR CONTROL METHOD  
A motor controller calculates a motor torque command based on motor speed and causes a motor to generate a torque corresponding to the motor torque command, to drive a machine load coupled to the...
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...
US20070092232 Motor drive unit  
A motor drive unit (100) includes a pulse train generator 38, a clock signal generator (18), and an energization signal generator (20). The pulse train generator (38) creates a pulse each time an...
US20070212034 SWITCHING NODE BASED SENSORLESS MOTOR CONTROL FOR PM MOTOR  
A circuit for indirectly measuring a sign of a current flowing in an inverter stage coupled to a phase of a motor or indirectly measuring the sign of the voltage induced by a counter Electromotive...
US20120063750 Speed Controller for Electric Motor  
A speed controller for a small electric motor is described. The controller is used to control small electric motors such as those used in small power tools such as electric screwdrivers. A series...
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...
US20080112696 METHODS AND APPARATUS TO LOCK A PHASE LOCK LOOP TO A MOTOR  
Methods and apparatus to lock a phase lock loop to a spindle motor are disclosed. An example controller comprises a counter to determine a period of an operating signal received from a motor, an...
US20090097830 MOTOR DRIVE DEVICE PROVIDED WITH DISTURBANCE LOAD TORQUE OBSERVER  
A motor drive device (10) including a velocity command preparing means for preparing a velocity command value of a motor (20), a velocity detecting means (21) for detecting a velocity of the...
US20090025170 Dual Mode Motor Controller For a Vehicle Window Wiper System  
A vehicle windshield wiper motor controller (10) includes a control circuit (15) and a power circuit. The power circuit can operate in dual modes, using a low cost MOSFET as the power switch...
US20090148139 Method of Operating Drill with Solid State Speed Control  
A method of operating a hand power tool in one embodiment includes generating a variable speed control signal with a solid state switch that corresponds to a selected speed for a motor, generating...
US20090226154 DC motor drive  
A DC motor drive (100) including power electronics (120) and control electronics (130). The power electronics (120) are arranged to receive a high voltage power supply and to controllably output...
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...
US20070189739 METHOD & ARRANGEMENT FOR COMMUTATING AN ELECTRONICALLY COMMUTATED MOTOR  
An electronically commutated motor has a permanent-magnet rotor (124) having: at least two rotor poles (183, 186, 188, 189); at least one phase (126): a power stage (122) for influencing a motor...
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...
US20080170841 Medical Handle  
A medical handle comprises a drive unit and a control device or circuit for driving a medical tool. The control device or circuit comprises a control and/or regulating circuit for controlling...
US20080247735 ADAPTIVE AND RECONFIGURABLE SYSTEM FOR DC MOTOR CONTROL  
An integrated circuit for controlling a DC motor is disclosed. The integrated circuit includes at least one digital position and speed circuit (DPS) for providing measurements of speed, position,...
US20110158614 MOTOR ROTATION SPEED CONTROL DEVICE AND METHOD THEREOF  
A motor rotational speed control device for controlling a direct current (DC) brush motor is provided, which includes a motor driver, a detection unit and a central processing unit (CPU). The...
US20070133957 Method of controlling speed of BLDC motor and method of controlling cooling speed of refrigerator using the same  
A method of controlling the speed of a BLDC (brushless direct current) motor and a method of controlling the cooling speed of a refrigerator using the same. A method of controlling the speed of a...
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...
US20090072768 USE OF AN ACCELEROMETER TO CONTROL VIBRATOR PERFORMANCE  
A mobile device includes a vibrator, an accelerometer that senses a parameter of rotation, and a processor. The vibrator includes a drive motor and a drive circuit. The accelerometer senses a...
Matches 1 - 50 out of 152 1 2 3 4 >