Abstract: Magnetic sensors each disposed to face each of current paths for each of windings with 2n phases (n is a multiple of three) in an AC rotating machine are included, and when each of a DC component and an AC component in a d-axis sum current and a q-axis sum current obtained by performing a dq-transformation into a two-axis coordinate system on 2n detection currents on the assumption that all current amplitudes of the windings are the same is represented collectively with each of terms expressed by sine functions with different phases to one another, each of the current paths at each of 2n current path arrangement positions is arranged to have a positional relationship where error components are reduced by cancellation among coefficients included at least in one of the terms or by cancellation among values of the terms.

Abstract: A motor driving system includes a controller, motors and motor drivers. In the normal supplying state of a power supply, the controller controls the motor drivers. The motor drivers output driving signals for driving the motors respectively. In an abnormal state or a power-off state of the power supply, one of the motor drivers is set to be a master driver and the others are set to be slave driver. The master driver activates a deceleration energy backup (DEB) function, powers the slave drivers through a common-DC-bus structure, controls the slave drivers, and during deceleration maintains a ratio between frequencies of the driving signals, until all of the motors are decelerated to stop at the same time.

Abstract: A communication system includes master and slave devices connectable to each other and forming a ring communication path. The master device outputs management data to manage communication along the ring communication path in a CW and CCW directions and receives the management data in the CW direction and in the CCW direction, and outputs, in the CW direction and in the CCW direction, control data to be used by the slave device to control equipment. The slave device acquires a history of transmission of the management data output from the master device and received by the slave device in the CW direction and in the CCW direction, and processes, based on the acquired history, one of the control data output from the master device in the CW direction and the control data output from the master device in the CCW direction to control the equipment.

Abstract: A method for pressing a workpiece with a predetermined pressing force uses a forming tool coupled with an electric motor via a spindle drive that converts the rotational movement of the electric motor drive shaft to a translational movement of the forming tool. The method includes: accelerating the electric motor in a first rotational direction to a predetermined maximal speed of rotation; operating the electric motor at the maximal speed until the drive shaft has completed a predetermined number of revolutions; reducing the speed of rotation of the electric motor to a predetermined reduced speed of rotation; operating the electric motor at the reduced speed until a pressing force increase exceeding a predetermined threshold value is detected by a measuring unit that follows the electric motor; forming the workpiece with constant detection of the pressing force by the measuring unit until the predetermined pressing force has been reached.

Abstract: A wiper system for a machine is provided. The wiper system includes a first motor configured to operate a first wiper and a second motor configured to operate a second wiper wherein the first motor and the second motor are connected in a parallel configuration. The wiper system further includes a power source which is in electrical connection with the first and the second motors for energizing each motor to move the respective wipers. The wiper system includes a switch configured to simultaneously operate the first motor and the second motor in one of a high speed mode, a low speed mode, or a park mode. The wiper system includes an isolating circuit configured to isolate the first motor from the power source and allow the second motor to run independent of the first motor when the switch is set in the park mode and speed of the first motor is different from speed of the second motor.

Abstract: An electric motor communication system for use with a fluid moving system is provided. The electric motor communication system includes an electric motor including a wireless communication device configured to transmit and receive wireless signals, and a processing device coupled to the wireless communication device and configured to control the electric motor based at least in part on wireless signals received at the wireless communication device. The electric motor communication system further includes at least one external device configured to communicate wirelessly with the electric motor.

Abstract: A motor control apparatus for reducing the influence of magnetic fluxes from yokes on the switching of an energization direction. A rotor is rotatable and has a magnet. The magnet is circumferentially divided into a plurality of portions alternately multipolar magnetized to different poles. The coils are energized to excite the magnetic pole portions. Magnetic sensors output signals when detecting magnetic fluxes. Comparators output comparison result signals indicative of results of comparison between the output signals from the magnetic sensors and reference signals. A control circuit controls energization directions of the coils based on the comparison result signals. The control circuit changes the values of the reference signals according to a relationship between the polarities of the magnetic pole portions.

Abstract: A motor drive system of the present disclosure includes a first motor unit having a first processor, and a second motor unit having a second processor, which are connected together by a communication line. The first processor sends data at regular intervals P1. The second processor receives the data at the regular intervals P1 from first time, and executes a task operating based on the data at regular intervals P2 from second time as a starting point. In a synchronization mode, the second processor changes the second time to new second time that occurs within a predetermined allowable time from the first time. In a normal operation mode, the first processor sends data via the communication line at the regular intervals P1, and the second processor executes the task operating based on the data at the regular intervals P2 from the new second time as a starting point.

Abstract: A control device and a control method capable of realizing control based on a sequence program and control based on a numerical control program with a smaller number of process steps are provided. The control device that is capable of controlling a plurality of motors includes: a first program executing unit that executes a sequence program for each control cycle; a second program executing unit that calculates an instruction value for each motor in accordance with a numerical control program; and a state managing unit that manages a control state correlated with a group including a plurality of predetermined motors of the plurality of motors. The state managing unit updates the control state based on at least one of an instruction from the first program executing unit and an execution state of the numerical control program in the second program executing unit.

Abstract: The present disclosure concerns a system for driving a Venetian blind comprising a blind assembly which comprises a Venetian blind, an electric motor for actuating the movement of said Venetian blind and first electronic means configured to generate a drive signal for driving said electric motor; a control unit having drive means for driving the movement of said Venetian blind, a power source for generating a current signal to power said electric motor and second electronic means that are in signal communication with said drive means and with said power source for controlling said electric motor; a two-wire power line disposed between said control unit and said blind assembly to power said electric motor with said current signal and the first electronic means are in signal communication with said second electronic means via said two-wire power line.

Abstract: A communication system with train bus architecture is described. The communication system with the train bus architecture comprises a coupling device for transmitting a first instruction packet string having instruction packets via first path; the controlled module for receiving the first instruction packet string via first path, wherein the controlled module selects one instruction packet from the instruction packets, replaces the selected instruction packet by first response packet for forming second instruction packet string, and processes the selected instruction packet to generate a second response packet; and a terminal device for receiving the second instruction packet string via the first path, and for transmitting the second instruction packet string back to the coupling device via the at least one controlled module along a second path from the terminal device to the coupling device wherein the first path is connected to the second path to form train bus architecture.

Abstract: A motor control device includes a master-shaft drive device to drive a master-shaft motor, and a slave-shaft drive device to drive a slave-shaft motor, the motor control device including a correction-amount calculation unit to use a detection result of a position of the master-shaft motor and a detection result of a position of the slave-shaft motor to calculate a correction amount for correcting a speed command that is to be used for controlling the master-shaft motor, a correction unit to use the correction amount to correct the speed command that is to be used for controlling the master-shaft motor, and a position control unit to execute position control on the slave-shaft motor by using the detection result of the position of the master-shaft motor as a position command.

Abstract: The present disclosure relates to a work machine, in particular in the form of a dump truck or of a truck, having a diesel electric traction drive, comprising at least one internal combustion engine, at least one alternator, at least one set of power electronics as well as at least one electric motor, wherein the power electronics are divided into two or more functional modules and at least one, each, functional module has an encapsulated housing.

Abstract: The present invention provides a motor driving method, a battery pack, and a semiconductor device capable of variable-controlling a bus voltage from a battery pack. A battery pack outputting a bus voltage to a positive voltage node using a negative voltage node as a reference, an inverter unit converting the bus voltage to AC voltage by switching according to a PWM signal and driving a motor, and a motor control unit generating the PWM signal are used. The motor control unit outputs a voltage instruction signal for instructing the bus voltage toward the battery pack. The battery pack variable-controls the number of cells coupled in parallel between the positive voltage node and the negative voltage node so as to obtain the bus voltage according to the voltage instruction signal.

Abstract: A method for controlling a first motor and a second motor to synchronize respective positions of the first motor and the second motor may comprise comparing the positions to determine a position difference, incrementally increasing a speed of one of the first motor and the second motor and incrementally decreasing a speed of the other of the first motor and the second motor according to the position difference, and repeating the incrementally increasing and incrementally decreasing until the respective positions are synchronized. Additionally, motor current limiting may be applied by reducing the target speed of the motor(s) with high applied torque(s), which may result in a position difference between the two motors subject to synchronization/correction. If current limiting is applied to one or both of the motors, speed synchronization may be applied in addition to position-based synchronization.

Abstract: Water is removed from the windshield of a ground vehicle via a wiper sweeping across the windshield, thus transporting the water thereon to a particular side. At least one remote sensor registers set of parameters in respect of other ground vehicles. A controller unit determines a point in time when a substantial amount of water is expected to hit the windshield of the own vehicle as the result of another vehicle moving proximate thereto and controls the operation of the wiper such that, before said point in time, the wiper is placed at a predetermined position. At said point in time, a stroke of the at least one wiper is initiated from the predetermined position over said surface. In one embodiment, this means moving the at least one wiper in a continuous sweep such that it passes the predetermined position at said point in time.

Abstract: An energy storage system including a plurality of loads each converting direct current (DC) power stored in a battery thereof into alternating current (AC) power and outputting the AC power, a plurality of slave power controllers detecting zero crossing points of AC voltage signals output from one of the plurality of loads and controlling the plurality of loads in accordance with a control signal received from a master power controller, and the master power controller controlling the plurality of slave power controllers so as to control the plurality of loads in accordance with the control signal received from the master power controller after a preset time has lapsed since the detected zero crossing point.

Abstract: A system and method of controlling light distribution in a space including an installed light source, an external light source, at least one blind(s) for a window in the space, a lighting control unit and a daylight/blind control unit, the method includes, in the lighting control unit, estimating task illuminances from the installed light source and the external light source at a plurality of measuring areas within the space, determining an intensity level of each of the installed light source based on the estimated illuminances; and determining a first positioning of the blinds according to predetermined requirements and/or measurements, in the daylight/blind control unit, receiving the plurality of measuring areas data within the space, determining a second positioning of the blinds according to predetermined requirements, selecting either the first or second positioning of the blinds to provide optimal daylight comfort, glare prevention and view.

Abstract: Provided is a method and controller for controlling a vehicle dc bus voltage. The method includes generating a parameter. The parameter is based on a reference dc bus voltage squared. The method includes controlling the vehicle dc bus voltage based on the parameter and a detected dc bus voltage. The method may also include generating another parameter based on a power demand associated with at least one of a motoring mode operation and a generating mode operation of a traction motor associated with the vehicle. The power demand is indicated in a message received via a dedicated high speed data bus. The method includes controlling the vehicle dc bus voltage based on the another parameter.

Abstract: An inverter electrically operatively connects to a multi-phase electric machine, and a method for controlling the inverter includes executing a six-step mode to control the inverter and monitoring an electric voltage angle of the electric machine at a preset sampling frequency. When the electric voltage angle approaches a step transition associated with control of one of a plurality of switches of the inverter in the six-step mode, an intermediate duty command for the one of the switches is determined and a carrier signal is aligned based upon a present state of the one of the switches. The one of the switches is controlled employing the intermediate duty command and the aligned carrier.

Abstract: This invention concerns a method to detect the wetness state of a vehicle windshield surface (S) comprising a windshield wiper unit (1), the windshield wiper unit (1) comprising: —wiper blades (5) configured to wipe the windshield surface (S) when set in motion, —at least one motor (7) configured to set the wiper blades (5) in motion, —a controller (9), configured to control the at least one motor (7), the method comprising the steps: —measuring the power consumption of the at least one motor (7), —determining the wiping speed (W) of the wiper blades (5), —using the measured power consumption and determined wiping speed (W) to deduce a friction related coefficient of the windshield surface (S), —comparing the deduced value to at least one predetermined value in order to determine the wetness state of the vehicle windshield surface (S).

Abstract: An information handling system cooling fan has a vibration filter that tunes out predetermined fan vibration frequencies to reduce fan vibration transfer from the cooling fan to an information handling system chassis in a targeted frequency range. For example, a leaf spring and damper are biased between the cooling fan and a fan bay support so that stiffness of the spring attenuates selected vibration frequency ranges of the cooling fan bay subsystem, such as frequency ranges where the vibrations have the greatest amplitude or frequency ranges where the vibrations tend to damage other components of the information handling system.

Abstract: An alternating current rotating machine control device that shares information among power conversion devices and instruments. A power conversion system has a top level control device, a master station, multiple power conversion devices, instruments (such as a temperature sensor and a pressure sensor), and the like. The top level control device is connected to two of the power conversion devices by a first communication line. These power conversion devices have two or more communication functions, and are connected to a remaining power conversion device, a temperature sensor, and a pressure sensor by a second communication line.

Abstract: 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, a converter, or a high level controller. The external signal is preferably generated periodically, and the switching period is resynchronized to the external signal each time the external signal is received. Optionally, either the start time or the midpoint of the switching period may be aligned with external signal. Further, the external signal may be sent to multiple inverters. Preferably, a first portion of the inverters align the start time of their respective switching period to the external signal and a second portion of the inverters align the midpoint of their respective switching period to the external signal.

Abstract: A fan array vibration control system may include a fan array having a plurality of fans, and a control unit operatively connected to the fans. The control unit is configured to operate the plurality of fans and detect a phase relationship among the plurality of fans. The control unit is configured to reduce the phase relationship among the plurality of fans in order to reduce vibrations within the fan array.

Abstract: 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 inverter further includes an amplitude adjusting unit configured to adjust, when second data is received by a communication unit, according to the received second data, amplitude of a first command voltage to balance an actual output current output from a master inverter to the motor and an actual output current output from each of one or more slave inverters to the motor.

Abstract: In some preferred embodiments, a motor control circuit 1 for controlling driving of a plurality of motors 3 and 4 includes a serial communication circuit configured to perform serial communication with an outside, a received data storage 15 configured to store data from the serial communication circuit, a motor mode setting holding circuit 16 configured to store motor mode settings which decide operations of the motors, and a detection circuit 24 configured to detect changes in driving pulse of the motor. Depending on the detected result of the detection circuit 24, the data stored in the received data storage 15 is transferred to the motor mode setting holding circuit 16.

Abstract: This invention relates to methods and devices for motor speed control. The invention has particular application in the control of motors over packet networks. In embodiments of the invention, phase-locked loop principles are used to remotely control the speed of an electric motor over a packet network. The setpoint for the motor is supplied by arriving timestamps from a speed-mapped variable frequency source. The shaft speed of the motor is measured with a tachometer with its output proportional to the motor speed. Any deviation of the actual speed from the setpoint is amplified by the power amplifier whose output drives the motor. Speed control over packet networks allow smoother operation of a process, acceleration control, different operating speeds for each process recipe, compensation for changing process variables, slow operation for setup purposes, adjustments to the rate of production, accurate positioning, and control torque or tension of a system.

Abstract: A system for transmitting electric power into a bore hole, the system having an electric transmission line extending through the bore hole between an electric power source and a receiving station, wherein the receiving station includes frequency increasing means for increasing the frequency of the electric current supplied through the electric transmission line, voltage converter means for changing the voltage of the electric current supplied to it via the frequency increasing means, connecting means for supplying the frequency-increased electric current to the voltage converter means, and means for connecting an electric load to the receiving station.

Abstract: The system comprises a first motor for applying rotational energy to a respective first wheel of the vehicle. A second motor is arranged for applying rotational energy to a respective second wheel of the vehicle. A first inverter is coupled to the first motor, where the first inverter is capable of receiving direct current electrical energy from the direct current bus. The first inverter is configured to provide a first group of alternating currents with a corresponding reference phase. A second inverter is coupled to the second motor. The second inverter is capable of receiving direct current electrical energy from the direct current bus. The second inverter is configured to provide a second group of alternating currents with a phase shift with respect to the reference phase, such that the phase shift is effective to reduce the direct current ripple on the direct current bus.

Abstract: A method for is disclosed for using pulse-width modulated (PWM) signals in the control of a plurality of electric motors or of at least one electric motor with multiple windings. The method comprises steps of: measuring the current being drawn by each of said electric motors; transmitting signals corresponding to the current being drawn said plurality of motors to a central controller; transmitting from said central controller signals corresponding to the amount of current to be drawn by each motor, whereby the relative phases and durations of said signals are distributed according to a predetermined protocol; and repeating steps (a) through (c) while said electric motors are in operation. The distribution of PWM signals defines the total current drawn from said source of electricity as a function of time.

Abstract: A rail vehicle has a powered bogie, wherein the powered bogie has driven wheels. Each driven wheel of the powered bogie can be driven by an electric machine, with a power converter being assigned to the electric machine. As a result, a separate power converter is assigned to each driven wheel.

Abstract: What is disclosed is a novel system and method for determining printer component velocity variations by analyzing multiple page test patterns. A test pattern, such as ladder chart targets, is produced that extends across multiple pages. Corresponding page sync signals are recorded and used to maintain phase coherence when analyzing scanned images associated with the multiple pages. An algorithm determines the ladder rung positions and the average photoreceptor velocity between each ladder rung on each scanned image for each page. Interpolation is used for proper phase alignment of the velocity data that spans multiple pages. The long assembly of phase coherent velocity data is then analyzed in one embodiment to determine its frequency content and to estimate the photoreceptor motion quality error sources. Based upon these estimated error sources, a trouble condition or pending maintenance problem with the printer is able to be indentified.

Abstract: A vehicle, including two controllable electrical drives, which are capable of being operated in mutual dependence, the rotational speed and the torque of a first drive, in particular a master drive.

Abstract: A method of synchronizing the timing of a plurality of physically coupled print engines wherein the receiving sheet is inverted between a first and a second print engine including determining any change in the speed of the master print engine relative to the speed at original set up and adjusting the timing parameters within the slave print engines based on the speed of the master engine.

Abstract: A control device for electric motors, capable of precisely moving one object by using two electric motors based on periodically repeated commands. The control device includes a first learning controller for calculating an amount of correction so that a positional deviation of a first electric motor is minimized, and a second learning controller for calculating an amount of correction so that a positional deviation of a second electric motor is minimized. The first and second learning controllers are independent from each other, and configured to minimize the positional deviation of the corresponding electric motor. The parameters set in the learning controllers, each defining the response of learning control of each electric motor, are equal to each other.

Abstract: An arrangement for supplying power to a system includes a first electric drive unit constructed to supply mechanical power to or receive mechanical power from a first coupled system of machines and a second electric drive unit constructed to supply mechanical power to or receive mechanical power from a second coupled system of machines. The first and second coupled system of machines are constructed to receive mechanical power or mechanical energy or to supply mechanical power or mechanical energy. The arrangement further includes a first kinetic energy storage device having a first electrical energy exchange machine which is electrically connected to the first electric drive unit, and a second kinetic energy storage device having a second electrical energy exchange machine which is electrically connected to the second electric drive unit. The first kinetic energy storage device is coupled to the second kinetic energy storage device.

Abstract: The present examples provide for the cancellation, or substantial reduction, of fan noise typically encountered in equipment cooling applications. Local audio nulls may be created by adjusting fan velocity and/or phase to cancel the fan noise near an operator. In a first example, phase and velocity of the fan may be controlled by feedback techniques. This technique utilizes feedback provided by a microphone located in the proximity of the operator to create an area of audio nulling of the fan noise. Local audio nulls may also be created by manipulating fan, phase and velocity by a controller that implements a process to create local audio nulls using the fixed position of equipment and the operator in the determination.

Abstract: A method for is disclosed for using pulse-width modulated (PWM) signals in the control of a plurality of electric motors or of at least one electric motor with multiple windings. The method comprises steps of: measuring the current being drawn by each of said electric motors; transmitting signals corresponding to the current being drawn said plurality of motors to a central controller; transmitting from said central controller signals corresponding to the amount of current to be drawn by each motor, whereby the relative phases and durations of said signals are distributed according to a predetermined protocol; and repeating steps (a) through (c) while said electric motors are in operation. The distribution of PWM signals defines the total current drawn from said source of electricity as a function of time.

Abstract: A power limiting system for multiple electric motors includes an electrical power generating component, such as an alternator, and a plurality of motor controllers connected to an electrical bus. Each motor controller compares the voltage on the bus to a specified minimum voltage and a specified maximum voltage, and reduces its electric power output if the voltage on the bus is less than the maximum voltage while continuing to operate the electric motors.

Abstract: A variable frequency transformer including: a first parallel circuit including at least two of the rotary transformers arranged in parallel and having an isolating circuit breaker connected to a rotor winding of each of the rotary transformers, and a separate synchronizing circuit breaker connected to a stator winding in each of the rotary transformers in the first parallel circuit; a first main transformer having a first winding connectable to a first power grid and a secondary winding connectable to the isolating circuit breaker in the first parallel circuit; a second main transformer having a first winding connectable to a second power grid and a secondary winding connectable to each of the synchronizing circuit breakers in the first parallel circuit, and a control system operatively connected to each of the synchronizing circuit breakers, the isolating circuit breakers and the drive motors for each of the rotary transformers.

Abstract: A wiper apparatus includes: a wiper blade driven by a motor; and a wiper blade driven by a motor. The motors are drive-controlled by control microcomputers, respectively. The control microcomputers are connected to each other through a communication line. While exchanging position information of the wiper blades through the communication line, the control microcomputers synchronously drive the motors on the basis of a position relationship between both of the wiper blades. In the case where a communication abnormality occurs when the position relationship between the wiper blades is in a normal state, the wiper blade is stopped after reaching a lower turning position. In the case where the communication abnormality occurs in a state where the position relationship between the blades is inverted, the blade is stopped after reaching an upper turning position.

Abstract: A system and method for controlling multiple cooling fans is presented. The circuitry for directly driving each of the motors is removed from the motor casings, thus increasing air flow and reducing replacement costs should a motor fail. The system includes a common processor for centrally controlling the speeds of the motors and monitoring the performance of each of the multiple motors.

Abstract: A continuously variable electrical gearbox has a rotatable rotor, a stator, an interrotor with a first and a second cage conducting first and second magnetisation currents. A regulator has a decoupling network connected in series with the gearbox having as input parameters: set values for the first and second magnetisation current levels, set values for the first and second torque between the rotor and interrotor and interrotor and stator and as output parameters: rotor current and stator current, a recording device for recording first and second magnetisation currents and a feedback system for feedback of first and second magnetisation currents as input parameters from the decoupling network. Rotor current and stator current are determined from the input parameters: set values for the first and second magnetisation current levels, set values for the first and second torque, first and second magnetisation currents are recorded and fed back to the decoupling network.

Abstract: A synchronization control system includes plural controlling object apparatuses connected through first and second wired OR lines. Each controlling object apparatus includes a function of switching an output to the first wired OR line from a first state to a second state in an odd numberth synchronization waiting state and switching an output to the second wired OR line from the first state to the second state in an even numberth synchronization waiting state. A control apparatus determines an odd numberth synchronization in response to changing of the first wired OR line from the first state to the second state when all the controlling object apparatuses enter the odd numberth synchronization waiting state, and determines an even numberth synchronization in response to changing of the second wired OR line from the first state to the second state when all the controlling object apparatuses enter the even numberth synchronization waiting state.

Abstract: An electric drive fuel control system and method for controlling a total drive torque supplied to a fuel metering pump includes a first main drive motor, a second main drive motor, and a backup drive motor, all coupled to the fuel metering pump. The operability of a main motor control to control electric current supply to the first main drive motor or the second main drive motor is determined. If the main motor control is operable, the total drive torque to the fuel pump is supplied from the backup motor and either the first main drive motor or the second main drive motor. If the main motor control is inoperable, the total drive torque to the fuel pump is supplied from only the backup drive motor.

Abstract: A power system including at least two self-controlled synchronous machines operating in parallel synchronously, a central three-phase converter to which all these machines are connected in parallel, at least two rotor position sensors. The system also includes at least one control module that receives phase currents from each synchronous machine, signals output from position sensors, and a required reference torque value and that powers the three-phase central converter so as to slave the phase currents for each machine as a function of the required reference torque.

Abstract: A method and a device for synchronously controlling multiple printing presses or multiple units in a printing press can reduce power consumption and improve durability of motors and motor bearings. A synchronous control device for multiple printing presses includes machine shafts of a main printing press and a sub printing press respectively provided with drive motors and is configured to synchronously control rotation of the sub printing press with respect to rotation of the main printing press. Here, drive motor brakes are attached to the respective drive motors, and drive control devices respectively configured to release synchronous control of the drive motor of the sub printing press by a stop instruction and to start the drive motor brakes of both of the printing presses are provided.

Abstract: A motor drive unit comprises a DC power source, a plurality of inverter circuits for converting the a power of this DC power source to an AC power, current detectors for detecting an output current of at least one of those plurality of inverter circuits and a controller for performing PWM control of those plurality of inverter circuits. This controller is constructed in a way to synchronize a PWM period of the plurality of inverter circuits, so as to drive a plurality of motors at once by means of those plurality of inverter circuits respectively.

Abstract: An apparatus for use with an encoder feedback device includes a comparator, a counter, and a prediction unit. The encoder feedback device is coupled to rotate with a rotating load and operable to generate at least one feedback position signal indicative of movement of the rotating load. The comparator is operable to receive the feedback position signal and generate a first position signal including a plurality of edges based on the feedback position signal. The counter is operable to receive the first position signal and count the edges to periodically generate position values at a predetermined update interval. The prediction unit is operable to receive a position data request at a first time and predict a position of the rotating load at the first time as a function of at least a subset of the position values generated prior to the first time and a misalignment between the first time and the predetermined update interval to generate an aligned position signal.