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7622882 |
Position detection device for permanent magnetic machines
The invention indicates a correct one of multiple rotor positions. For example, the invention can determine, in a PM machine, which of two possible positions a rotor is in when the position is...
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7609012 |
Motor control apparatus
In an automatic transmission position control by a motor, it is determined whether the present instant belongs to a starting period, that is, the present instant is immediately after resetting of a...
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7573950 |
IBOC broadcasting receiver
An IBOC broadcasting receiver that uses two different bit error rates as threshold values in receiving hybrid broadcasting in a simultaneous broadcasting format, and switches between digital...
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7573227 |
Controller and control method of permanent magnet type rotary motor
A controller of a permanent magnet type rotary motor of the present invention includes: a current difference calculator decomposing a primary voltage difference which is a difference between a...
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7560894 |
Method and system in connection with permanent magnet synchronous machines
A method and a system in connection with a speed and position sensorless permanent magnet synchronous machine equipped with an output filter and driven by an inverter, which method comprises the...
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7541761 |
Electric motor with integral regulator inductance
An apparatus and a method of manufacture of a DC electric motor operable over a range of voltage by virtue of a DC-DC regulator having an inductance provided by one or more windings on the stator...
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7534395 |
Hysteresis compensation system
A system and method for compensating for hysteresis in laboratory liquid handling apparatus. The system comprises a carriage holding a drive gear that meshes with and drives a gear rack. A...
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7531982 |
Motor drive apparatus capable of accurately estimating demagnetization of permanent magnet motor
A map holding unit holds, in the form of a map, a voltage control amount of the q axis in a case where no demagnetization of a permanent magnet motor occurs. Based on a motor revolution number,...
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7511444 |
Motor control apparatus for controlling motor to drive output shaft with positioning accuracy unaffected by backlash in rotation transmission system
A motor control apparatus controls a motor that drives an output shaft through a rotation transmission system. The difference between a newly established output shaft target rotation angle and a...
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7508156 |
Electrical machine having a series chopper circuit
A controller and a motor assembly having a controller. The controller includes a first switch assembly in a series configuration with the motor, where the first switch assembly has a first...
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7492117 |
Electromagnetic variable degrees of freedom actuator systems and methods
The present invention provides a variable reluctance actuator system and method that can be adapted for simultaneous rotation and translation of a moving element by applying a normal-direction...
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7443125 |
Power conversion apparatus
A power conversion apparatus for converting power from an alternating source to dc includes an input stage for receiving power from the alternating source, which includes an input filter, a...
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7439702 |
Application of a switched reluctance motion control system in a chiller system
A chiller system includes a switched reluctance motor for powering the compressor of the chiller system. A variable speed drive with a boost converter provides a boosted voltage to the switched...
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7432677 |
Closed-loop rotational control of a brushless dc motor
Method and apparatus for controlling a brushless dc motor, such as the type used in a data storage device to rotate data storage media. A sequence of drive pulses is applied to rotate the motor....
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7429840 |
Control of an electrical reluctance machine
An electrical machine having stator ( 30 ) and rotor ( 31 ) is disclosed. The motor has field windings (F) and armature windings (A) energized by a suitable power electronic controller ( 401 ). A...
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7408318 |
Motor drive unit
A motor drive unit is adapted to detect a motor lock-up condition (in which an electric motor is accidentally locked during driving) based on the fact that motor drive current increases in that...
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7394229 |
Switched reluctance generator
A Switched Reluctance (SR) generator having improved efficiency at low and high speed is disclosed. The SR generator includes a step-up converter for controlling an excitation voltage of an...
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7391180 |
Pulse width modulation control circuit for a multimode electrical machine, and a multimode electrical machine equipped with such a control circuit
A pulse width modulation (PWM) control circuit for a multimode electrical machine and a multimode electrical machine equipped with such a control circuit, including a configuration circuit that...
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7388345 |
Rotor position detection in an electrical machine
An electrical machine is controlled with a combination of a physical rotor position transducer and a software position detection algorithm. The physical transducer has a reduced number of sensors,...
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7372232 |
Apparatus for drive control, power conversion, and start-up control in a PMBDCM or two-phase SRM drive system
A power converter for a switched reluctance motor (SRM) or a permanent magnet brushless direct current (do) motor (PMBDCM) may include a front-end boost partial circuit for connecting with a first...
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7365505 |
Image forming apparatus using noise-resistant motor control device
An apparatus for controlling a rotational motion of a motor is disclosed which includes: a signal generator generating a rotational state signal indicative of a rotational state of the motor; and a...
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7348754 |
Motion control using electromagnetic forces
An apparatus has (a) a first component having one or more electromagnetic elements and (b) a second component having one or more electromagnetic elements and movably coupled to the first component....
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7323839 |
Direct current motor controlling method
A direct current motor controlling method includes a mean for transforming a duty signal to computed value by a microprocessor unit. The microprocessor unit computes the computed value and then...
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7312595 |
Motor control apparatus
Presence/absence of a failure in a feedback control system of a motor is monitored. When a failure is detected in the feedback control system, the motor is driven by switching to an open-loop...
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7288915 |
Rotor position detection of an electrical machine
An electrical machine is controlled without using a physical rotor position detector. When more than one phase is used simultaneously to produce sufficient torque for the application, the increased...
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7282885 |
Device and method for controlling an electric motor, especially in motor vehicles
In a device for controlling an electric motor, especially in motor vehicles, for setting a setting element, moved by the electric motor, as a function of the deviation of an actual setting from a...
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7276830 |
Flux impulse motor
A motor ( 1 ) has a stator ( 2 ) and a rotor ( 10 ) mounted for rotation in the stator. A commutating salient pole ( 11 ) of the stator as a winding ( 7 ), and a field-producing salient pole ( 12 )...
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7271556 |
Method and apparatus for estimating rotor position of switched reluctance motor, and method and apparatus for sensorless control of switched reluctance motor
A discrete rotor position estimation method for a synchronized reluctance motor is provided. A d.c.-link voltage V dc and a phase current I ph are sensed. A flux-linkage λ ph of an active phase...
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7265513 |
Variable reluctance electric power system
A variable reluctance electric power system which comprises an alternator and a motor having a rotor with longitudinal lobes and no windings, commutators, slip rings, magnets, or laminations. The...
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7250738 |
Nonlinear hysteresis control system
A nonlinear hysteresis control system for controlling an actuator with nonlinear hysteresis effect is disclosed. An improved extended hysteresis effect profile further stores the displacement when...
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7235947 |
Synchronous motor control method and synchronous motor control system
A desired q-axis current is determined based on a desired torque, and a desired d-axis current is determined based on the rotating speed of a synchronous motor when the terminal voltage of the...
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7233124 |
Motor drive inverter control apparatus
A motor drive inverter control apparatus includes a rectifier circuit for rectifying an AC power supply, an inverter circuit driven by an output from the rectifier circuit, a motor driven by an...
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7221116 |
Motor control apparatus
In an automatic transmission position control by a motor, it is determined whether the present instant belongs to a starting period, that is, the present instant is immediately after resetting of a...
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7211985 |
Training device
On a training device, in particular for developing human muscles, having a torque-generating unit which comprises an electric motor and a reduction gearing, and whose output interacts with at least...
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7208895 |
Control systems and methods for permanent magnet rotating machines
Systems and methods for controlling a rotating electromagnetic machine. The rotating machine, such as a permanent magnet motor or hybrid switched reluctance motor, includes a stator having a...
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7202625 |
Multi-motor switched reluctance traction system
A switched reluctance traction system is provided for work machines. The switched reluctance traction system may include a plurality of switched reluctance motors. Each switched reluctance motor...
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7202619 |
Variable frequency drive for AC synchronous motors with application to pumps
Two apparatuses are disclosed for controlling the speed of an AC synchronous motor-pump utilizing a series of stepped voltage pulses at the driving frequency. The first apparatus is an isolated...
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7202618 |
Inverter device
The control device records, in advance, a current data table which specifies relationships between currents in respective phases in a three-phase motor and rotation angles of a rotor of the...
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7199548 |
Drive control apparatus and method of alternating current motor
A drive control apparatus, which controls an AC motor subjected to rotational drive by applying a rectangular wave voltage thereto, comprising: an actual torque detection section for detecting an...
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7180263 |
Synchronous motor control method and device
Synchronous motor controlling apparatus and method controls power applied to minimize or eliminate speed variations of a synchronous motor due to variations in load imposed the motor. The...
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7174262 |
Rotor position detection in an electrical machine
An electrical machine has a rotor position transducer which provides output signals to a control system. The output signals contain errors due to component shortcomings and manufacturing...
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7161325 |
Lead-angle control method and device for operating permanent magnet synchronous motor in flux weakening regions
A lead-angle control device according to the present invention includes: a space voltage vector controller calculating effective vector application times necessary for obtaining output voltage...
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7154245 |
Method to prevent midrange resonance during operation of a multi-phase step motor
The frequency of the pulse width modulator within a step motor control circuit is increased above a base frequency under defined conditions to enable more accurate construction of the phase current...
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7151359 |
Variable reluctance generator
A variable reluctance generator has phase windings and a bias winding. By controlling the excitation produced by the bias winding, the speed of the machine or the DC link, a power converter using...
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7148649 |
Hybrid-electric vehicle having a matched reactance machine
A hybrid-electric vehicle including a matched reactance machine power generation system (MRMPGS). The MRMPGS comprises a permanent magnet rotor type machine having a selected back electromotive...
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7138784 |
Position command and pulse timing command optimization for step motors, using a position sensor
Optimized pulse commands are utilized for reducing vibration in a step motor, the optimized commands being created by correcting position, velocity, acceleration, deceleration, and movement...
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7134396 |
System to generate and control levitation, propulsion and guidance of linear switched reluctance machines
A translation system, applicable in trains, elevators, aircraft launchers, rail guns, conveyors, door openers, machine tools and servo drives, includes a first linear switch reluctance machine...
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7119512 |
Switched reluctance machine control system and method
A switched reluctance machine system includes a stator, a rotor situated to rotate relative to the stator and a plurality of phase windings situated in the stator. A power supply is connected to...
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7109673 |
Apparatus and method of controlling motor in manner resistant to additive noise during start up of motor
An apparatus for controlling a rotational motion of a motor is disclosed which includes: a signal generator generating a rotational state signal indicative of a rotational state of the motor; and a...
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7102325 |
Method for determining rotor flux vector of AC electrical machine
A method for determining the rotor flux vector of an electrical machine, the method comprising the steps of controlling the electrical machine with an inverter, forming an equation for the reactive...
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