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9041330 Sensorless brushless motor control device  
A sensorless brushless motor control device includes a first amplification module common to all motor phases and generating an intermediary voltage signal, a voltage divider between each motor...
9030141 Motor controlling circuit, motor driving device and method of driving motor  
There is provided a motor controlling circuit including: a hall signal level detecting unit detecting a hall signal from a hall sensor; and a signal generating unit sensing a change in a level of...
9024563 Pitch motor drive circuit which can operate in emergency mode  
A pitch drive circuit that operates in an emergency mode, for a wind or water power plant. The circuit has at least one rectifier unit, at least one DC intermediate circuit, two inverter units and...
9024569 System and method of rotor time constant online identification in an AC induction machine  
A system and method for determining a rotor time constant of an AC induction machine is disclosed. During operation of the induction motor, a flux signal is injected into a rotor flux command so...
9024555 Motor control device  
A motor control device has an overcurrent test unit to send a first test voltage Vt1 lower than a reference voltage Vref for overcurrent determination and a second test voltage Vt2 not lower than...
9018876 Electric power steering apparatus  
When a current sensor fails, instead of a normal-time motor control section, an abnormal-time motor control section drives and controls a motor. The abnormal-time motor control section detects a...
9007004 Sensorless AC motor controller  
A controller for an AC electric motor, includes a Feed Forward Torque Controller and a load model. The Torque controller directly derives a torque related component of applied motor voltages from...
8988030 Power control for electrical applications over long cables  
This disclosure is drawn to methods, systems, devices and/or apparatus related to power control in applications over long cables. Specifically, the disclosed methods, systems, devices and/or...
8988027 Motor control apparatus and motor control method  
A motor control apparatus according to the embodiment includes a rotational position estimating unit, a change amount estimating unit, and an inductance estimating unit. The rotational position...
8963460 Method and system for controlling motor  
A method for controlling a motor is provided. The method comprises obtaining electrical signals of the motor with a signal unit, the electrical signals comprising a motor torque and an angular...
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...
8941342 Integrated servo system  
An integrated servo system and a method of controlling a motor is provided. The integrated servo system includes a position detector which determines original position data of a motor and a...
8941349 Motor drive circuit  
A motor drive circuit includes: an advance angle setting correcting device having a correction reference cycle according to a reference advance angle count value, in which a correction amount is...
8937450 Motor driving system and motor system  
A motor driving system including command value output means configured to output an analog value according to a rotation speed command; a first power line having first switching means; a drive...
8928271 Method and apparatus to convert a minimally controlled pulse stream into a proper mechatronic trajectory  
An apparatus or method which accepts a burst of pulses at a frequency which may not be tightly controlled and converts this into a trajectory command that is a suitable motion profile for an...
8922155 Monitoring motor condition  
In various implementations, a condition of a motor may be monitored based at least partially on time required to achieve a change in speed. A notification may be transmitted based on the condition...
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.
8907598 Method for operating an actuator for manoeuvring a windable mobile element of a home automation appliance and actuator operating according to this method  
Method for operating an actuator for maneuvering a windable mobile element of a home automation appliance, the mobile element being able to be displaced between two extreme positions, the method...
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...
8896258 Method and device for starting an electric motor  
A method for starting an electric motor having a rotor, comprising the following steps:—driving the rotor with a first torque in a first rotational direction, wherein a maximum value of the first...
8890449 Electric power tool, lock state occurrence determination apparatus, and program  
A lock state occurrence determination apparatus includes a counter, a reset device, a reference time changing device, a lock state determination device, and an invalidation device. The...
8890460 Servo control device  
A servo control device includes a follow-up control unit that controls a control target that drives a mechanical system by a motor, a command function unit that has input therein a phase signal θ...
8878481 Method and apparatus for limiting in-rush current to a starter motor of a vehicle  
A system and method for limiting engine starting current of a starter motor of an engine is described. In one example, starter motor current is controlled according to vehicle speed. The method...
8853990 Inverter device of rotating electrical machine, and driving method for rotating electrical machine  
An inverter device of a rotating electrical machine drives a multiphase rotating electrical machine having the variable number of rotations using a switching element provided for each phase. An...
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...
8829830 Synchronous machine control apparatus  
A control command generator that generates an armature interlinkage flux command and a torque current command by a torque command, a rotation speed, and an operation target command, includes a...
8823300 Electric motor control device  
An electric motor control device includes a control section adapted to control supply of a drive current to an electric motor, and a rotational speed detection section adapted to detect a...
8823296 Combined electric device for powering and charging  
The invention relates to a combined method and device for powering and charging, wherein said device comprises an AC motor (6), a converter (2), storage means (5), and switching means (4) either...
8823314 Energy saving system and method for devices with rotating or reciprocating masses  
A system and method are provided for reducing the energy consumed by a pump jack electric motor by reducing the supply voltage to the motor when the motor would be generating energy in open loop...
8816623 Motor controlling apparatus and method of the same  
Disclosed herein is a motor control apparatus and a method thereof. The operation efficiency of a compressor may be maintained by using a sensorless algorithm, sampling a current applied to a...
8803454 Sensorless optimum torque control for high efficiency ironless permanent magnet machine  
Embodiments of the present invention permit the optimization of torque control of a permanent magnet machine including obtaining instantaneous terminal voltages of the machine, transforming the...
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...
8796962 Drive unit, image forming apparatus incorporating same, peripherals incorporating same, and control method therefor  
A drive unit, which can be included in an image forming apparatus with peripherals disposed thereto and use a control method therefore, includes an inner rotor brushless DC motor, a driver, a...
8773063 Motor drive system and control method thereof  
A motor drive system comprising: an inverter that supplies power to a three-phase motor; and a control unit that controls switching elements of upper and lower arms included in the inverter by...
8766578 Method and apparatus for high velocity ripple suppression of brushless DC motors having limited drive/amplifier bandwidth  
A method and apparatus are provided for ripple suppression of brushless DC motors at any given velocity irrespective of the limited bandwidth of the driver/amplifier supplying the excitation...
8766563 Drive arrangement for the motor-driven adjustment of an adjustable element in a motor vehicle  
Described herein is a drive arrangement for the motor-driven adjustment of an adjustable element in a motor vehicle, the drive arrangement having two electrical drives and a control device, the...
8766589 Motor control unit and vehicle steering system  
In a motor control unit, a current-carrying failure detection unit determines a first determination condition and a second determination condition. The current-carrying failure detection unit...
8766587 Motor controlling apparatus and controlling method of the same  
Disclosed herein is a motor control apparatus and a method thereof. A phase error of the reference voltage output corresponding to a time delay caused by digital control may be compensated to...
8749192 Electric motor and electric generator  
An electric motor comprising a stator having two coil sets arranged to produce a magnetic field of the motor, each coil set comprising a plurality of coil sub-sets; and two control devices,...
8736222 Flux controller for induction motor  
Disclosed is a flux controller for maintaining reliable flux estimation performance in a low velocity region, the controller including a velocity controller, a torque current controller for...
8736206 Power converting apparatus  
A power converting apparatus including a power converter that converts a DC voltage into an AC voltage and applies the AC voltage to an AC rotating machine and a control unit that controls the...
8736211 Motor control device  
Provided is a motor control device which realizes automatic adjustment of control of a motor for driving a mechanical load through a simple operation. The motor control device includes: a...
8736210 Apparatus and method for determining speed of an induction motor  
Speed of a motor, generator or alternator, more particularly the speed of an alternating current (AC) induction motor is determined. Problems associated with previous devices are overcome by...
8729843 Apparatus including motor  
To suppress torque variation including various frequency components, a lot of measuring and adjusting operations are necessary, and this takes much time and trouble. An electronic apparatus...
8698447 Energy saving system and method for devices with rotating or reciprocating masses  
A system and method are provided for reducing the energy consumed by a pump jack electric motor by reducing the supply voltage to the motor when the motor would be generating energy in open loop...
8698446 Method to save energy for devices with rotating or reciprocating masses  
A system and method are disclosed for turning off the voltage to a pump jack electric motor during predetermined periods of time to save energy. In the method, the motor's response to closed-loop...
8690549 Centrifugal pump unit  
The invention relates to a centrifugal pump assembly with an electric drive motor and with a control device having a frequency converter, for the control of the rotational speed of the drive...
8653774 Motor driving circuit  
A motor driving circuit may include a Hall sensor configured to generate a Hall signal according to the position of a rotor of a motor to be driven; a Hall bias circuit; an analog amplifier...
8638057 Selective additional control in a control console for surgical instruments  
A control console to remotely control medical equipment is disclosed having a base with an ergonomically adjustable pedal system. The base further has an opening to receive the pedal system. The...
8624533 Inverter power generator  
An inverter includes a voltage command generator generating a voltage command value according to an externally specified voltage value, a PWM signal generator generating a PWM signal according to...