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9018869 Motor control device and seat control device for vehicle  
A motor control device includes an acceleration portion for increasing a target number of rotations of a motor every predetermined calculation cycle until the target number of rotations of the...
9018890 Electric motor having a pulse width modulator  
The invention relates to an electric motor having a stator and a rotor. The electric motor also comprises a controller, wherein the controller is connected to the stator and/or rotor, and is...
9018883 Motor drive circuit  
A motor drive circuit operates in a first mode in which the output current flowing to a first output terminal from a second output terminal is increasing or in a second mode in which the output...
9018884 Motor control device, image forming apparatus, motor control method, and computer-readable storage medium  
A motor control device includes a motor lock state determining unit configured to determine whether a motor is in a rotation lock state; a position hold state determining unit configured to...
9018874 Circuit for filtering narrow pulse and compensating wide pulse, and motor controller comprising the circuit  
A circuit for filtering narrow pulse and compensating wide pulse, including a signal shaping circuit, a filter circuit, and a pulse width compensating circuit. The signal shaping circuit processes...
9013124 Reverse current protection control for a motor  
A method is provided. A command to correspond to a target speed of a motor is received. A rotational speed of the motor is measured, and a brake-to-off ratio for a braking interval is calculated...
9013128 Brushless motor drive device  
A brushless motor drive device switches energization modes for supplying power to two phases of a three-phase brushless motor, based on an induced voltage induced in a non-energized phase. In a...
8994310 Motor controller having multi-functional pin and control method thereof  
The present invention provides a motor controller having one or more multi-functional pins. The motor controller includes a plurality of pins but does not include a dedicated pin for transmitting...
8988015 Power tool having a non-linear trigger-speed profile  
A power tool including a motor, an input unit such as a variable-speed trigger switch, and a controller is provided. The controller controls the speed of the motor as a function of the input level...
8981701 Apparatus and method for compensating offset of current sensor  
Provided is an apparatus for compensating offset of a current sensor detecting a motor current supplied by an inverter for PWM (Pulse Width Modulation) control of a motor, the apparatus including...
8963472 Integration of spindle external sense resistor into servo IC with stable resistance control circuit  
An apparatus, comprises three driver FETs coupled at their sources; note-driver circuit; a first sense FET coupled to the sources of the three driver FETs; a current mirror having the first sense...
8963453 Method and apparatus for synchronization of pulse width modulation  
An inverter executing a PWM routine is configured to synchronize the switching periods of the PWM routine to an external signal. The external signal is generated, for example, by another inverter,...
8963468 Motor control device and electric power steering device  
A motor control device includes an anomaly detection means that detects an anomaly occurring on power feeding paths of respective phases on the basis of first electric current values, second...
RE45388 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...
8963471 Pulse width modulation DC motor controller  
A controller for a DC motor comprises an output switching element configured to couple to the DC motor; an input switching element coupled to the output switching element; a pulse width modulated...
8963473 Method and system for powering and measuring positions of a plurality of DC-motors over a wire interface  
A system comprising a motor controller for providing a plurality of first power signals and a single common second power signal to a motor module comprising a plurality of potentiometers...
8963479 Power conversion device for a rotary electric machine  
A power conversion device includes an inverter unit and a control unit. The inverter unit includes high SWs and low SWs for each phase of coils of a motor. The control unit, in a case that the...
8947035 Heat dissipation system, rotation speed control circuit and method thereof  
A rotation speed control circuit is disclosed. The rotation speed control circuit includes a temperature-controlled voltage duty generator, a pulse-width signal duty generator, a multiplier and a...
8947031 Systems and method for speed and torque control of a DC motor  
A method for operating a direct current (DC) motor is shown and described. The method includes using pulse width modulated (PWM) DC output to control the speed of the DC motor. The method further...
8937446 Control of a brushless permanent-magnet motor  
A method of controlling a brushless permanent-magnet motor that includes rectifying an alternating voltage to provide a rectified voltage having a ripple of at least 50%, and exciting a winding of...
8917044 Electronic circuit and method for detecting a zero current in a winding of an electric motor  
A motor control circuit and associated techniques detect a zero crossing of a current in a motor winding by detecting a reverse current in a half bridge circuit used to drive the motor winding.
8912744 Method and apparatus for dynamically adjusting a dead time of brushless direct current motor during a phase change  
A method and apparatus for dynamically adjusting a dead time of a BLDC motor during a phase change detect the winding current of the BLDC motor during the dead time, and terminate the dead time...
8907604 PWM frequency pattern optimization for NVH  
An optimized pseudo-random period pattern can reduce audible noise in a system that includes an inverter circuit configured to provide power to an electric machine. A system can include a PWM...
8907611 Method and apparatus for space vector pulse width modulation of a three-phase current construction with single DC-link shunt  
A method for driving a motor having a plurality of phases is provided. Initially, first, second, and third intervals for a pulse width modulation (PWM) period from first and second voltage...
8901868 Starting sensorless brushless direct-current (BLDC) motors based on current-ripple analysis  
In one embodiment, a method includes measuring between two consecutive electrical commutations of a brushless direct-current (BLDC) motor a current through the BLDC motor. One or more...
8890459 Motor control device and electric power steering system  
A motor control device with which both high-accuracy current detection and improvement in voltage utilization factor are achieved is provided. When an ON time of any one of low potential side...
8890466 Circuit arrangement  
A circuit arrangement, especially for supplying an electromagnetic holding brake with a clocked supply voltage, includes a module for controlled provision of a clocked supply voltage for...
8878388 Motor control device that decreases power consumed by control power source when power fails  
A motor control device has a current value sampling unit configured to sample a current value of a motor, a PWM signal generation unit configured to generate a PWM signal to drive the motor, based...
8872464 Motor control method  
A motor control method comprises: inputting a PWM signal into a control unit for the control unit to obtain a direction command and a speed command by an identification rule, and generating a...
8866422 Aircraft motor drive control apparatus  
An inverter and a control unit that has a command signal processing unit and a PWM frequency control unit and performs pulse width modulation control are provided. If the command signal processing...
8866429 Device and method for power-saving driving of device having same load pattern  
A power-saving driving device is provided for a same load pattern device 23 that is driven by a motor 21 receiving electric power from an inverter 19 and repeatedly operated in a same load...
8847537 Motor driving device for adjusting motor speed and setting the lowest rotating speed and the driving method thereof  
A motor driving device and a driving method thereof is disclosed herein and comprises a PWM converting circuit, an oscillator, a comparator, a controlling unit. The PWM converting circuit converts...
8836289 Combination charger and motive power device  
A combined battery charger and motor driver circuit assembly includes a rechargeable battery, a traction motor configured to accept a pulse-width-modulated (PWM) drive, a PNP transistor array, a...
8836270 Inverter system and communication method  
In an inverter system, a phase adjusting unit configured to adjust, according to reception timing of first data, a phase of second PWM carrier to match a phase of first PWM carrier. A master...
8833485 Battery-powered portable tools  
A battery-powered portable tool, such as a chainsaw, hedge trimmer or handheld drill, comprising: a housing (1), a driven element (2) supported by the housing (1), an electric motor (6) coupled to...
8823299 Power supply module for hall sensorless brushless direct current motor  
Disclosed is a power supply module for a hall sensorless BLDC motor, including: a high-voltage/large-current power device t applied with high voltage/large current and including a plurality of...
8823298 Apparatus and method of braking applied in a laundry treating appliance  
A method of operating a laundry treating appliance to control a rotational speed of a drum to move the laundry within the drum according to a predetermined category of movement.
8816621 PWM output apparatus and motor driving apparatus  
A PWM output apparatus includes a calculating circuit configured to calculate an output width of a PWM output signal of a first signal and a second signal, which have phases different from each...
8816614 Diagnosis of over-current conditions in bipolar motor controllers  
A circuit for controlling a load current through a coil is connected to an output port of a transistor H-bridge that includes two low side transistors and two high side transistors. A current...
8810183 PWM signal output circuit  
A PWM-signal-output circuit includes a detecting unit to detect periods in which a speed signal with logic level changing alternately and having a period corresponding to a motor-rotation speed is...
8810184 Motor driving circuit and motor driving system  
The characteristic is defined by a characteristic line that connects a lowest point at which the duty of the PWM signal is a minimum value and the rotation command signal is a minimum rotation...
8803464 Fan speed control circuit  
A fan speed control circuit is provided. The circuit includes a control chip. The control chip stores a relationship table recording a number of duty cycle intervals and a number of rotational...
8803463 Method for moving an element, which is driven by an electric motor inside a predetermined movement section between two block positions each formed as a limit stop, into a block position  
A method for moving a movable element into a block position includes providing a supply voltage to an electric motor associated with the movable element for the motor to generate a motor current...
8796979 Apparatus for driving brushless DC motor  
Disclosed is an apparatus for driving a BLDC motor, the apparatus including: a BLDC motor having a single sensing coil therein; a position/speed calculation unit for calculating a current position...
8796978 Predictive pulse width modulation for an open delta H-bridge driven high efficiency ironless permanent magnet machine  
Embodiments of the present method and system permit an effective method for determining the optimum selection of pulse width modulation polarity and type including determining machine parameters,...
8786242 Method and device for controlling load and voltage in voice coils  
A method for sensing and compensating for variances in load and voltage in a closed loop voice coil system is described. A load in a system which included a supply voltage and the load, which...
8780594 Parallel inverter drive system and the apparatus and method for suppressing circulating current in such system  
Proposed is a parallel inverter drive system including includes a plurality of inverter drives connected in parallel with each other, in which each inverter drive includes a switch; a PWM...
8773060 Brushless motor drive device and drive method  
The invention relates to a brushless motor drive device that performs switching determination of energization modes of a three-phase brushless motor according to a sensorless method, and a drive...
8766583 Voltage mode using pseudo current limit  
According to an aspect of the invention, an apparatus includes: a spindle motor; and circuitry configured to spin up the spindle motor by increasing a command voltage in small steps while...
8764527 Method and apparatus for providing cooling air to equipment  
At least one aspect of the invention is directed to a ventilation device. The ventilation device includes a frame configured to be mounted to a barrier, and a plurality of air moving devices...