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9024552 Current control gain adjusting method for PM motor, current control method, and control device  
The present invention includes a voltage applying step of applying an applied voltage including a DC component and a plurality of frequency components to a PM motor, a motor current detecting step...
8988022 ***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Current control gain adjusting method for PM motor, current control method, and control device
 
The present invention includes a voltage applying step of applying an applied voltage including a DC component and a plurality of frequency components to a PM motor, a motor current detecting step...
8922143 Control system for a rotary machiine  
An estimation section estimates a time period required for a norm of a difference vector between a current flowing to a motor/generator and a command current to attain a threshold level r in each...
8878475 Current limiting for a motor winding  
Techniques and apparatus for limiting the current through a motor, such as a motor for rotating a rotatable element of a hard drive. The current can be limited based on a threshold. A first...
8872454 Control unit of rotary device  
In a control unit that controls a control amount of a rotary device by controlling on and off states of switching elements of a power converting circuit, a relative rate predicting section...
8847527 Control system for a rotary machine  
An estimation section calculates estimated currents corresponding to switching modes, which are provisionally set by a mode setting section. A mode determination section determines one of modes,...
8829835 Controller of a motor and method of controlling the same  
According to one embodiment, a controller of a motor includes a driving signal output module, a position detector, a determiner, and an over current detector. The driving signal output module is...
8810168 Rotating machine controller  
In a norm setting section, a norm of an output voltage vector of an inverter is set based on a required torque and an electrical angle speed. In a phase setting section, a phase is set as...
8729839 Driving apparatus for sensorless fan motor  
A BEMF detection circuit generates a rotation detection signal indicating a comparison result between electromotive force voltages VU through VW which occur at a terminal of respective multiple...
8680804 Servo control method and servo control apparatus  
A method according to an example of the present invention is a servo control method to be applied to a feed drive mechanism configured to drive an object to be driven by using a plurality of...
8610381 Voltage determination device and clock control device  
A voltage determination device includes a reference voltage generation circuit; a determination target voltage line; a first voltage line; a second voltage line; and a switching circuit disposed...
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...
8598824 Motor drive circuit  
A motor drive circuit includes: a drive circuit configured to drive a motor whose coil current decreases with increase in counter electromotive voltage of a motor coil; a detection circuit...
8502485 Motor drive circuitry  
A motor drive circuit includes a positive and a negative supply rail for connection to a battery (104), a motor drive circuit including a plurality of motor drive subcircuits which each...
8476852 Controller for a brushless motor  
A controller for a brushless motor that includes a processor, a first timer, a second timer, a compare register, a comparator, an input, and one or more outputs. The processor starts the first...
8471505 Device to synchronize the change of the driving mode of an electromagnetic load  
A device for the change of the driving mode of an electromagnetic load from a first operating mode with pulse width modulation to a second operating mode that is linear by means of switching...
8466643 Motor drive device, and motor drive method  
A motor drive device includes a drive controller for generating drive signal “trq”, a limiter for limiting a value of drive signal “trq” within a range, a limit value generator for generating...
8421386 Control apparatus for multi-phase rotary machine  
A control apparatus controls an inverter (electric power converter circuit) which is connected for selectively applying a plurality of voltage levels to each phase of a polyphase rotary machine....
8395337 Brushless motor device and control device  
A brushless motor device switches between a 120-degree energization method and a 180-degree energization method of advancing an electrical angle by 30 degrees to drive a brushless motor 1...
8340624 Receiver circuit adapted to communication apparatuses operative with different power voltage range  
A LIN receiver includes a voltage divider that divides an input voltage and outputs the divided voltage, and a peak hold circuit that outputs a peak voltage of the input voltage. The LIN receiver...
8330401 Circuit unit for driving an electronically commutated fan motor  
The invention relates to a circuit unit for driving an electronically commutated fan motor with a power stage for driving windings of the fan motor and with a control stage for driving the power...
8264179 Method for control of synchronous electrical motors  
Method for control of synchronous electrical motors with application for stepper and Brush-Less Direct Current motors for which there is an explicit relation between the active electrical power...
8242724 Driving device for synchronous motors  
A driving device for three-phase alternating current synchronous motors controls state of charge of a capacitor, and a three-phase alternating current synchronous motor is started prior to the...
8232753 Control device for electric motor drive apparatus  
A electric motor drive apparatus comprising a voltage control unit performing voltage control processing that determines alternating-current voltage command values serving as command values of the...
8188693 DC bus boost method and system for regenerative brake  
Embodiments of the present invention provide novel techniques for using a switched converter to provide for three-phase alternating current (AC) rectification, regenerative braking, and direct...
8164285 External disturbance detection system and method for two-phase motor control systems  
A system includes a power control module, a period determination module, and a control module. The power control module controls current through stator coils of a motor to rotate a rotor. The...
8125169 Rotating electrical machine control system and vehicle drive system  
A rotating electrical machine control system includes a frequency converting portion that is interposed between a rotating electrical machine for driving a vehicle and a DC power source for...
8115429 Motor control apparatus and electric power steering system  
If the magnitude of a command voltage vector is greater than a predetermined voltage value indicated by a voltage limit circle, the magnitude of a voltage vector, which corresponds to a q-axis...
8102133 Control circuit for BLDC motors  
A BLDC (brushless direct current) motor system of the present invention includes a control circuit, a sequencer, a driving circuit, and a BLDC motor. The control circuit determines the maximum...
8089241 Motor drive control apparatus, vehicle equipped with motor drive control apparatus, and motor drive control method  
When a target operation point of either a motor MG1 or a motor MG2 is included in a resonance range specified by operation points of the motor MG1 or the motor MG2 in the occurrence of resonance...
8049448 Control circuit with dual programmable feedback loops for BLDC motors  
A BLDC (brushless direct current) motor system of the present invention includes a control circuit, a sequencer, a driving circuit, and a BLDC motor. The control circuit comprises a speed-feedback...
8040089 Drive device for synchronous electric motor  
Switching elements are driven by a control signal outputted from a control circuit, so that a rotating magnetic field is generated from a stator coil to rotate a rotor of a synchronous electric...
8030862 Methods and systems for operating direct current motors  
A method for applying power to an electronically commutated motor (ECM) is described. The method includes connecting an AC voltage source to an input of a rectification circuit, connecting a DC...
7994744 Method of controlling speed of brushless motor of ceiling fan and the circuit thereof  
The present invention relates to a method and a circuit of controlling a speed of a brushless motor of a ceiling fan. The circuit includes a motor PWM duty consumption sampling unit and a motor...
7944160 Redundant DC bus discharge for an electric motor system  
Methods and apparatus are provided for discharging a direct current (DC) bus providing power to a motor control circuit in an electric motor system. The method includes the steps of detecting a...
7932691 Permanent magnet motor start-up  
Methods and apparatus are provided for startup of a permanent magnet alternating current (AC) motor. The method comprises the steps of detecting startup of the permanent magnet AC motor; detecting...
7847498 Brushless motor driving device, brushless motor starting method, and method of detecting rotor stop position of brushless motor  
When starting a brushless motor, if the stop position of the rotor is detected between time t1 and time t2, a start-up excitation pattern in accordance with the rotor stop position is input for an...
7834567 Motor drive device  
A motor drive device for alternately driving a plurality of motors includes a position detection signal processing circuit for processing position detection signals of the plurality of motors, a...
7795826 Brushless motor driving circuit and motor having the same circuit  
A brushless motor driving circuit includes a deviation detector for receiving a PWM input signal, which issues an instruction for rpm control, and detecting a deviation from duty ratio 50% of the...
7746013 Method and device for controlling a brushless direct-current motor  
Presented in an apparatus for controlling a brushless DC motor with a permanent magnet arranged on a rotor and a stator with windings. The apparatus includes an observer that is adapted to...
7741797 Method for managing transitions in a three-phase BLDC motor and corresponding device  
A method is provided for managing at least one transition in a three-phase BLDC motor describing a cycle including six successive states, wherein the motor obtains first, second and third...
7679303 Evaluation device and method for rotary drive, corrective manipulated variable setting device and method, control device and method, and program  
An evaluation device for a rotary drive that evaluates periodic velocity fluctuation of the rotary drive is provided. The evaluation device includes a rotational velocity fluctuation detector, a...
7609010 Inverter  
The present invention relates to an inverter and a method for converting direct current voltage to alternating current. The inverter comprises a first input arranged to be connected to the...
7554249 Electric motor  
An electric motor, in particular a starter device for internal combustion engines in which a current-limiting electric resistor (57) with a negative temperature coefficient is connected at the...
7521884 Apparatus and method for controlling a transfer switch mechanism  
A controller for an automatic transfer switch mechanism in an electrical distribution panel, which automatically determines motor phase by monitoring the back EMF voltage of the motor when no...
7391174 Brushless DC motor control apparatus and control method thereof  
The invention relates to a brushless DC motor control apparatus controlling the number of revolutions of a brushless DC motor having a rotor with n poles (where n is a natural number) that rotates...
7301294 Motor speed control integrated circuit  
A motor speed control integrated circuit which controls a rotational speed of a motor by controlling the amount of current flowing through a drive coil of the motor. The integrated circuit...
7164244 Apparatus for controlling electric motors and related control method  
An electric motor controller controls the currents flowing through the phase windings of an electric motor. The electric motor controller includes driving stages for driving respective phase...
7164249 Fan control device and method  
A fan control device receives a reference revolution signal to control the rotation speed of a fan. The fan control device includes a reference signal generating module, a revolution modifying...
7148642 Controller arrangement with automatic power down  
A control circuit is described in which a single input terminal receives digital control signals and analog control signals. In accordance with the principles of the invention, the control circuit...

Matches 1 - 50 out of 92 1 2 >