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236results about "Linear motor control" patented technology
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Hall-effect based linear motor controller
Owner:ALLEGRO MICROSYSTEMS INC
Hall-effect based linear motor controller
A linear motion control device for use in a linear control system is presented. The linear motion control device includes a coil driver to drive a coil that, when driven, effects a linear movement by a motion device having a magnet. The linear motion control device also includes a magnetic field sensor to detect a magnetic field associated with the linear movement and an interface to connect an output of the magnetic field sensor and an input of the coil driver to an external controller. The interface includes a feedback loop to relate the magnetic field sensor output signal to the coil driver input.
Owner:ALLEGRO MICROSYSTEMS INC
Versatile control of a linear synchronous motor propulsion system
Control of Linear Synchronous Motors involves a number of low level issues of motor control—such as sensing precise position, controlling current in stator windings, and obeying commands from high level controllers—and high level vehicle control—such as stopping and starting, switching and merging, limiting speed and acceleration, synchronizing relative motion, preventing collisions and accidents, and dealing with failures. In most cases there is a master controller that directs vehicles based on simple commands but in other cases it is desirable to allow an external agent to provide more detailed control—such as synchronizing motion between a vehicle and a robot or allowing human operator control. This patent describes a versatile control scheme that allows both simplified high level control and, when or where necessary, control by an external agent. The result is a transport system and method that provides efficient and precise movement of vehicles on a guideway.
Owner:ROCKWELL AUTOMATION
Moving body system and method of determining initial position of moving body
ActiveUS20110050007A1Reliably determinedPrecise positioningDC motor speed/torque controlElectric motor controlLinear motorPosition sensor
In a moving body system, a movable element of a linear motor is provided on a moving body, and stationary elements of the linear motor and position sensors are provided on the ground. The stationary elements are arranged between the position sensors to enable determination of a rough position of the movable element based on a change of inductance resulting from interaction with a magnet array. An initial position of the moving body when a power supply for the moving body system is turned on is determined based on the rough position of the movable element relative to the stationary element and a signal from the position sensor.
Owner:MURATA MASCH LTD
Linear motor control apparatus and linear motor control system
ActiveUS20150303841A1Improve accuracyImprove precision controlAC motor controlMultiple dynamo-motor startersDriving currentControl signal
A linear motor control apparatus has: a plurality of coil units; a plurality of position detecting units for detecting positions of a plurality of trucks which move over the plurality of coil units; a plurality of deviation calculating units for operating deviation information as differences between the detected truck positions and a target position of the detected truck; a plurality of position control units for operating current control signals based on the deviation information; a plurality of current control units for supplying driving currents to the coil units based on the current control signals; and a switching unit for switching the position control units to which the deviation information is transmitted or switching the current control units to which the current control signals are transmitted.
Owner:CANON KK
Methods and apparatus for initializing a planar motor
InactiveUS20040007920A1Motor/generator/converter stoppersDC motor speed/torque controlCoil arrayPlanar motor
Methods and apparatus are provided for initializing a planar motor. A magnet array floating above a coil array may reside in one of a definite number of positions upon the introduction of current into the coil array. Torque characteristics of the magnet array are acquired when driving the magnet array with no phase offsets. Phase offsets for driving the magnet array with substantially no yaw can then be determined by analyzing the torque characteristics.
Owner:NIKON CORP
Linear motor
InactiveUS20120098469A1Improve controllabilityEasy to detectMotor/generator/converter stoppersDC motor speed/torque controlElectric machineWave shape
A linear motor includes a slider unit having a magnet row in which plural permanent magnets are arranged in series so that the same poles are opposed to each other, a stator unit including electromagnetic coils for plural phases arranged along a movement direction of the slider unit, and plural magnetic detector devices, wherein the plural magnetic detector devices are provided in response to the phases of the electromagnetic coils for plural phases and detect magnetic flux radially extending in a direction perpendicular to the arrangement direction of the permanent magnets at boundaries between the permanent magnets of the magnet row and output signal waveforms for plural phases at phases equal to phases of waveforms of back electromotive forces generated in the respective electromagnetic coils for plural phases when the magnet row moves.
Owner:GK BRIDGE 1
Methods and apparatus for initializing a planar motor
InactiveUS6777896B2Motor/generator/converter stoppersDC motor speed/torque controlCoil arrayPlanar motor
Methods and apparatus are provided for initializing a planar motor. A magnet array floating above a coil array may reside in one of a definite number of positions upon the introduction of current into the coil array. Torque characteristics of the magnet array are acquired when driving the magnet array with no phase offsets. Phase offsets for driving the magnet array with substantially no yaw can then be determined by analyzing the torque characteristics.
Owner:NIKON CORP
Linear Motor and Handheld Unit
InactiveUS20130237751A1Limited rangeUsefulness limitedMotor/generator/converter stoppersDC motor speed/torque controlPower flowElectric machine
A linear actuator is disclosed, that comprises a stator containing more than one coil, a mover containing more than one magnet, each said magnet separated from the adjacent magnet by a spacer, a power supply operable to provide current to said coils of said stator, at least one magnetic flux sensor, and a controller operable to control the relative motion between said stator and said mover, the controller comprising a module to measure the magnetic flux observed by the sensor and use that as feedback to control the motion of the mover relative to the stator. In a preferred embodiment, this linear actuator is used in a sexual appliance with user control over the linear actuator motion profiles.
Owner:ALEXANDER TAYLOR LAWRENCE
One-phase open-circuit fault-tolerant direct thrust control method for five-phase permanent magnet linear motor
InactiveCN108306571AIncreased complexitySave memory resourcesElectric motor controlVector control systemsPhase currentsModulation function
The invention discloses a one-phase open-circuit fault-tolerant direct thrust control method for a five-phase permanent magnet linear motor. Firstly, a Clark transform matrix and an inverse matrix thereof are derived based on fault-tolerant phase current. On the above basis, a stator flux linkage on alpha-beta is derived, a stator virtual flux linkage is defined according to the requirements of acircular stator flux linkage trajectory, and thus the voltage compensation on alpha-beta is derived. The stator actual voltage on the alpha-beta is derived by a modulation function of a voltage sourceinverter, and voltage is combined with voltage compensation and stator current, and a stator virtual flux linkage and thrust are observed by a stator flux observer and a thrust observer. Then statorvirtual target votlage is calculated according to given thrust, a given stator flux linkage amplitude and the observed stator virtual flux linkage and thrust. Finally, the stator actual voltage is calculated by the voltage and the voltage compensation, and the motor is controlled by the voltage by the voltage source inverter. According to the method, a thrust fluctuation caused by a motor failureis suppressed, and more importantly, the dynamic performance and steady state performance are consistent with that in a normal condition.
Owner:JIANGSU UNIV
Solid state energy storage and management system
ActiveUS20150091478A1Batteries circuit arrangementsDC motor speed/torque controlPower gridSupercapacitor
Systems and methods for energy storage and management may be useful for a variety of applications, including launch devices. A system can include a direct current (DC) bus configured to operate within a predetermined range of voltages. The system can also include an array comprising a plurality of ultra-capacitors connected to the DC bus and configured to supply the DC bus with energy. The system can further include an input configured to receive energy from a power grid, wherein the power grid is configured to supply fewer than 250 amps of power. The system can additionally include an output configured to supply more than 250 amps of power. The system can also include a controller configured to control charging and discharging of the array of ultra-capacitors and configured to control the DC bus to remain within the predetermined range of voltages.
Owner:VELOCITY MAGNETICS
Electric motor, drive system employing multiple electric motors, and method for controlling the same
InactiveUS7906925B2Simple configurationEasy to controlSynchronous motors startersAC motor controlEngineeringSystem controller
Owner:PARKSIDE IP LLC
Distributed-arrangement linear motor and control method of distributed-arrangement linear motor
ActiveUS20120139455A1Motor/generator/converter stoppersDC motor speed/torque controlPower flowRelative motion
A distributed-arrangement linear motor in which stators are arranged in a distributed manner and a method of controlling the distributed-arrangement linear motor are provided. The linear motor 1 is a linear motor in which a stator and a movable member are relatively movable, wherein the stator and the movable member respectively have periodic structures in which plural kinds of poles of the stator and the movable member (12a, 12b, 12c) (22a, 22b, 22c) which magnetically act each other and arranged periodically subsequently in an order according to the arrangement in a direction of the relative motion therebetween; a plurality of stators are arranged in a distributed manner in the direction of the relative motion; a distance D1, D2 between adjacent stators is not more than a length Lmv of the movable member; the pole of the stator is formed of a coil 11; and a current control unit that controls current to be supplied to the coil based on the distance between the stators is provided.
Owner:THK CO LTD
Encoder signal analysis system for high-resolution position measurement
InactiveUS20070205736A1Testing/calibration apparatusNoise figure or signal-to-noise ratio measurementSignal correctionRelative phase
Owner:MOOG INC
Discontinuous linear motor system
ActiveUS20130229134A1Simple power supplyLow costMotor/generator/converter stoppersDC motor speed/torque controlEngineeringMotor function
A linear motor system includes a discontinuous linear motor and motor control device. The discontinuous linear motor includes a mover and a plurality of individual motors spaced from each other along a movement path of the mover. Each of the individual motors functions as an armature on a primary side of one independent linear motor. A sensor, arranged to act as a linear scale, is disposed for each individual motor and detects a position of the mover. The motor control device includes a plurality of individual motor control units and a multiple unit controller to comprehensively control the individual motor control units. The individual motor control units control the individual motors disposed in curved path sections, and each of the individual motor control units includes a curved-line correspondence corrector to correct a detection value obtained from the sensor according to a relationship between a curved line of the path and a position of the sensor.
Owner:MURATA MASCH LTD
Linear motor control apparatus and linear motor control system
A linear motor control apparatus includes a plurality of coil units which are continuously arranged, a plurality of position detecting units configured to detect positions of a first truck and a second truck which move over the plurality of coil units, and a first deviation calculating unit configured to arithmetically operate deviation information as differences between values of the plurality of position detecting units and a target position. In addition, a first position control unit arithmetically operates current control signals on the basis of the deviation information, a first current control unit supplies driving currents to the plurality of coil units on the basis of the current control signals, and a switching unit outputs the values of the plurality of position detecting units for the first truck to the first position control unit and outputs the values of the plurality of position detecting units for the second truck to a second position control unit.
Owner:CANON KK
Versatile Control of a Linear Synchronous Motor Propulsion System
ActiveUS20130008336A1Easy to optimizeEasy maintenanceSpeed controllerAC motor controlSynchronous motorTransport system
Control of Linear Synchronous Motors involves a number of low level issues of motor control—such as sensing precise position, controlling current in stator windings, and obeying commands from high level controllers—and high level vehicle control—such as stopping and starting, switching and merging, limiting speed and acceleration, synchronizing relative motion, preventing collisions and accidents, and dealing with failures. In most cases there is a master controller that directs vehicles based on simple commands but in other cases it is desirable to allow an external agent to provide more detailed control—such as synchronizing motion between a vehicle and a robot or allowing human operator control. This patent describes a versatile control scheme that allows both simplified high level control and, when or where necessary, control by an external agent. The result is a transport system and method that provides efficient and precise movement of vehicles on a guideway.
Owner:ROCKWELL AUTOMATION
Linear motor
InactiveUS8643227B2Easy to detectImprove controllabilityMotor/generator/converter stoppersDC motor speed/torque controlWave shapeElectric machine
A linear motor includes a slider unit having a magnet row in which plural permanent magnets are arranged in series so that the same poles are opposed to each other, a stator unit including electromagnetic coils for plural phases arranged along a movement direction of the slider unit, and plural magnetic detector devices, wherein the plural magnetic detector devices are provided in response to the phases of the electromagnetic coils for plural phases and detect magnetic flux radially extending in a direction perpendicular to the arrangement direction of the permanent magnets at boundaries between the permanent magnets of the magnet row and output signal waveforms for plural phases at phases equal to phases of waveforms of back electromotive forces generated in the respective electromagnetic coils for plural phases when the magnet row moves.
Owner:GK BRIDGE 1
Method and Apparatus to Characterize Loads in a Linear Synchronous Motor System
A method and system for characterizing performance of a mover operating in a linear drive system is disclosed, where the linear drive system includes multiple track segments and where each track segment includes a segment controller. Each segment controller is configured to obtain an in-system frequency response for a mover present along the track segment. An injection sequence is generated within the segment controller, where the injection sequence includes harmonic content across a range of frequencies to be evaluated. The injection sequence is added to a control module within the segment controller, and the segment controller samples and records motion of the mover in response to the injection sequence. A frequency response corresponding to the recorded motion of the mover resulting from the injection sequence is obtained, and may be utilized to identify a resonant operating point or an undesirable level of the harmonic content present in the sampled data.
Owner:ROCKWELL AUTOMATION
Discontinuous linear motor system
ActiveUS8796959B2Simple power supplyLow costMotor/generator/converter stoppersDC motor speed/torque controlElectric machineMotor control
A linear motor system includes a discontinuous linear motor and motor control device. The discontinuous linear motor includes a mover and a plurality of individual motors spaced from each other along a movement path of the mover. Each of the individual motors functions as an armature on a primary side of one independent linear motor. A sensor, arranged to act as a linear scale, is disposed for each individual motor and detects a position of the mover. The motor control device includes a plurality of individual motor control units and a multiple unit controller to comprehensively control the individual motor control units. The individual motor control units control the individual motors disposed in curved path sections, and each of the individual motor control units includes a curved-line correspondence corrector to correct a detection value obtained from the sensor according to a relationship between a curved line of the path and a position of the sensor.
Owner:MURATA MASCH LTD
A system for balancing a vehicle and a control method thereof
ActiveCN109067264AStrong battery lifeReduce loss rateTorque ripple controlMultiple motor speed/torque controlMathematical modelParticle swarm algorithm
The invention discloses a balancing vehicle system and a control method thereof. According to a difference equation model and a drift error model of attitude signals of the balancing vehicle system, astate equation of an extended Kalman filter and a mathematical model of a permanent magnet linear motor are established. A second-order dynamic Terminal sliding film is used to drive permanent magnetsynchronous motor. Particle Swarm Optimization (PSO) is used to optimize the parameters of tracking controller, synchronization controller, clearance elimination controller and switching function ina two-motor system. The invention realizes that the signal collected by the sensor of the balancing vehicle has large noise and zero drift error, and solves the problem of poor robustness and the problem that the Brush motor structure is complex, fault, maintenance workload, short life, commutation spark easy to produce electromagnetic interference, as well as in the balance of the car in the process of running jitter, deviation is too large, and low security.
Owner:汇佳网(天津)科技有限公司
Motor parameter control system and motor parameter control method
ActiveCN109274308AAvoid difficultiesSimple stepsAC motor controlForce measurementLeast mean squares filterDigital down converter
Compared with the prior art, the invention provides a motor parameter control system and a motor parameter control method, comprising a forward processing module for linearly processing a control signal according to the parameters; Control object module, Includes DAC digital-to-analog converters. an amplifier circuit and an ADC analog-to-digital converter, wherein the control signal processed by the forward processing module is subjected to power amplification by the DAC digital-to-analog converter, and the voltage vcm [n] and the current icm [n] at both ends of the motor are obtained throughthe ADC analog-to-digital converter; System identification module, includes an LMS adaptive filter, The error signal err [n] of the measured current icm [n] and the predicted current icp [n] is filtered in the LMS adaptive filter by the least mean square filter, the iterative result is fed back to the forward processing module, and the feedback result is applied to the next data acquisition and parameter calculation. The motor parameter control system provided by the invention can solve the common difficulties in the actual measurement operation, simplify the steps, facilitate the measurementand ensure the accuracy of the measurement.
Owner:AAC TECH PTE LTD
Block switching transient minimization for linear motors and inductive loads
ActiveUS7969103B2Motor/generator/converter stoppersDC motor speed/torque controlCurrent thresholdClosed loop
A block switch controller for a linear motor is disclosed, the block switch controller having a motor current threshold profile controlling the switching of a plurality of block switches in a linear motor. Also, a block switch controller for a linear motor comprising a closed loop vector current controller that incorporates a delay state having a feedback gain is disclosed. Additionally, a method of switching a plurality of block switches that minimizes switching transients is provided. Finally, an article of manufacture containing computer code implementing a modeling and simulation program for modeling a linear motor system is provided.
Owner:ELECTRO STANDARDS LAB
Linear actuator and camera shake correction mechanism
InactiveUS20100322606A1InhibitionSmooth movementTelevision system detailsAssociation with control/drive circuitsEngineeringControl circuit
A linear actuator including a multipolar magnet configured such that an S pole and an N pole are linearly aligned in an alternating manner, coil body having a plurality of separate coil units integrally arranged in a lengthwise direction of the coil body being provided to be movable relatively with respect to the multipolar magnet, a magnetic sensor that detects a position of the coil body along the lengthwise direction of the coil body with respect to the multipolar magnet, and an electrifying control circuit that individually controls currents to be supplied to the plurality of coil units based on the position of the coil body detected by the magnet sensor.
Owner:PENTAX RICOH IMAGING CO LTD
Moving-magnet type linear motor controlling system and manufacturing method of parts
ActiveUS20170117829A1Accurate calculationHighly accurately controlledAC motor controlMultiple motor speed/torque controlLocation detectionControl system
A moving-magnet type linear motor controlling system which can highly accurately control carts even when a plurality of coil units apply forces to the carts is provided. The moving-magnet type linear motor controlling system has: a plurality of coil units having a plurality of coils; a position detecting unit for detecting the positions of the plural carts which are moved along the plurality of coil units; and a controlling unit for determining a ratio of currents which are supplied to the plural coil units on the basis of the positions of the plural carts and an impedance and thrust characteristics of each of the plural coil units.
Owner:CANON KK
Electric Motor, Drive System Employing Multiple Electric Motors, and Method for Controlling the Same
InactiveUS20090079372A1Easy transferSimple configurationMotor/generator/converter stoppersSynchronous motors startersWave shapeSystem controller
The motor according to one aspect of the present invention has an output waveform correcting unit for correcting the waveform of the output signal of a magnetic sensor during operation of the electric motor. ID codes for identification purposes are assigned respectively to a plurality of magnetic sensors. The output waveform correcting unit receives, from an external device, output waveform correction values for the magnetic sensors together with the ID codes, and stores the output waveform correction values for the magnetic sensors in memory. The drive system according to another aspect of the present invention has a plurality of electric motors, and a system controller connected to the plurality of motors via a shared communication line. Each electric motor has an identification code register that stores an identification code for identifying each electric motor. The system controller has an individual control mode in which operation of individual motors is controlled by transmitting commands to individual electric motors together with identification codes via the shared communication line.
Owner:PARKSIDE IP LLC
Zero ripple linear motor system
InactiveUS6922025B2Well formedTorque ripple controlProgramme-controlled manipulatorDevice typeLinear motion
The present invention relates systems and methods for compensating for errors associated with a linear motion system. The systems and methods determines one or more errors associated with the linear motion system and adjusts or corrects an input drive signal associated with the linear motion system to compensate for the one or more errors. The one or more errors of the linear motion system can include cogging errors and ripple errors. The one or more errors can be measured using a measurement system or the one or more errors can be associated with selectable coefficients or parameters, such as standard errors, or device type errors stored in a library.
Owner:ROCKWELL AUTOMATION
Apparatus for driving optical-reflector
ActiveCN107918183AImprove space utilizationMiniaturizationTelevision system detailsLinear motor controlOptical reflectionMechanical engineering
Owner:JAHWA ELECTRONICS
Method and Apparatus to Diagnose a Linear Synchronous Motor System
A method and system for detecting and reporting component failures in a linear drive system may identify failed position sensors, failed position magnets, and failed drive coils in the linear drive system. As a mover travels along a track segment in the linear drive system, signals corresponding to the position of the mover and to the current commanded in each drive coil are stored. Analysis of the stored signals identifies whether one of the position sensors along the track segment, one of the position magnets on the movers, or one of the drive coils, used to propel the movers along the track, has failed.
Owner:ROCKWELL AUTOMATION
Controller of linear motion device and control method of the same
The present disclosure relates to controllers of linear motion devices and control methods of the same, in particular, to a controller of a linear motion device and a control method of the same capable of controlling the position of the linear motion device accurately, in a case where a misalignment of the mounting position of a magnetic sensor or a magnetizing variation of a magnet occurs, or in a case where a magnetic field detected by the magnetic sensor receives an interference of the magnetic field generated by a driving coil of the linear motion device.
Owner:ASAHI KASEI ELECTRONICS CO LTD
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