Abstract: A method for identifying the discrete instantaneous angular speed of electromechanical systems in which electrical rotating machinery is used and in which at least one electrical signal is measured during an operation of the electromechanical system. The method includes measuring analog stator current signals and analog stator voltage signals for at least one phase A, B, C, converting the measurements into a digital discrete form, transmitting the digital discrete signals to a computer device wherein data analysis is performed in a processor unit on the basis of a simplified mathematical model of the dynamics of the motor or generator. During the data analysis an average rotor time constant is calculated, an average supply frequency value is identified, an average angular speed is obtained, and an instantaneous phase difference between the discrete stator current signals and the discrete stator voltage signals is determined.

Abstract: A control device of a synchronous electric motor includes: the synchronous electric motor with three-phase stator windings Y-connected; a detection unit that detects a neutral point potential which is a potential at a Y connection point; and an inverter that drives the synchronous electric motor. The control device of the synchronous electric motor which controls the synchronous electric motor using the inverter, includes a measurement mode in which the neutral point potential is detected in a state in which the synchronous electric motor is energized by an AC current and controls the synchronous electric motor based on a value of the neutral point potential detected in the measurement mode.

Abstract: A shift range control apparatus switches shift range by controlling the drive of a motor. The shift range control apparatus includes a feedback controller that is configured to perform position feedback control based on a target angle determined corresponding to the request shift range and the actual angle of the motor; a stationary phase energization controller that is configured to perform stationary phase energization control that energizes a stationary phase selected corresponding to an actual angle; and a switching controller that switches between motor control states. The switching controller switches the control state to position feedback control when the request shift range is switched. When the difference between the target angle and the actual angle becomes equal to or less than an angle determination threshold value, the switching controller switches the control state from position feedback control to the stationary phase energization control.

Abstract: A motor control apparatus that controls a stepping motor includes a calculation unit configured to determine a time with respect to a distance based on a theoretical formula expressing a parameter in an acceleration period or deceleration period of the stepping motor. The calculation unit includes a first calculation unit and a second calculation unit. The first calculation unit is configured to apply an iterative root-finding procedure to a distance which is a function of a time included in the theoretical formula to determine the time with respect to the distance of the n-th step expressed using a reciprocal of a derivative of the function. The second calculation unit is configured to apply the iterative root-finding procedure to the reciprocal of the derivative to determine the reciprocal of the derivative at a time when the first calculation unit determines the time with respect to the distance of the n-th step.

Abstract: A current command module is configured to, based on a motor torque request for an electric motor of the vehicle, generate a d-axis current command for the electric motor and a q-axis current command for the electric motor. A voltage command module is configured to generate voltage commands based on the d-axis current command and the q-axis current command. A switching control module is configured to: based on the d-axis current command and the q-axis current command, determine a first duty cycle command for a phase of the electric motor; generate a second duty cycle command based on the first duty cycle command, a predetermined minimum period to transition switches of an inverter module from OFF to ON, a predetermined switching period, a predetermined deadtime period when both of the switches are OFF before one of the switches is turned ON, and whether a current of the phase is positive.

Abstract: A motor controller includes memory, and processing circuitry that controls a motor based on a position command and based on a position detection value corresponding to a detected position of the motor, calculates a tolerance position error in a successive manner based on the position command and based on a control parameter used to control the motor, calculates a position error maximum threshold that depends on the tolerance position error, detects an abnormality based on the position error maximum threshold, and triggers an indication when the abnormality is detected.

Abstract: A linear compressor and methods of operation, for example, to detect polarity for the linear compressor are provided herein. The method may include supplying an initial time varying voltage to the motor of the linear compressor at an assumed polarity; estimating a first acceleration of the motor of the linear compressor when the motor is at a bottom dead center position; estimating a second acceleration of the motor of the linear compressor when the motor is at a top dead center position; comparing the first acceleration to the second acceleration; and determining whether the assumed polarity is correct based on the comparison.

Abstract: The rotating-electric-machine control apparatus is provided with two or more torque compensation amount maps that each store a torque compensation amount corresponding to a detection rotation speed and a first torque command and a torque compensation amount map selector that selects a single torque compensation amount map from the two or more torque compensation amount maps, based on at least one of the detection rotation speed and control information indicating a control method utilized by the voltage applying device.

Abstract: A control device for controlling an aircraft, the control device including at least one motor-driven trim actuator with active type anchoring, the trim actuator including at least one electric motor, at least one electronic power circuit for electrically powering the electric motor(s), and speed reduction means for driving rotation of an outlet shaft of the trim actuator. The control device implements three distinct servo-control loops that are nested in one another, these three servo-control loops being formed by an electric current servo-control loop, a speed servo-control loop, and a force servo-control loop.

Abstract: A device has a plurality of power converter groups and a control system. A power converter group has a group of power converters and is coupled between an input voltage source and a group of windings of a motor generator. The control system is configured to control currents of the windings such that the number of poles of and the number of phases in a pair of poles of the motor/generator are dynamically adjusted, and the number of poles and the strength of a magnetic field of the motor generator are controlled to reduce a power loss. The motor/generator has an air gap and a stator with a plurality of slots, where the windings are installed in. The windings are configured such that the number of poles and the number of phases in a pair of poles of the motor/generator can be dynamically adjusted.

Abstract: Provided is a control device 150 for an electric motor 140 which includes multiple energization systems each including an inverter and coils corresponding to different phases, and which generates a steering assist force in an electric power steering system. Control device 150 diagnoses whether any of inverters 1A and 1B fails, and, when either of the inverters is diagnosed as having failed, reduces the output ratio of the failing inverter to 0% while increasing the output ratio of the normally operating inverter to 100% so as to prevent a drop in the total output from all the inverters after the failure-positive diagnosis. If steering operation is performed after the failure-positive diagnosis, control device 150 performs overheat protection processing for gradually lowering the limit value for the total output from all the inverters in accordance with the sensed temperature of the normally operating inverter.

Abstract: A method for controlling a single coil brushless DC motor, the method comprising at least a first EHP sequence which comprises: driving the motor using a driving signal during a torque generating period, to accelerate the motor, such that during a subsequent generator mode period a phase current goes in generator mode; driving the motor during the generator mode period using a generator mode signal, which allows the phase current to be in generator mode; monitoring the phase current during the generator mode period thereby obtaining phase current information; and determining parameters of a next EHP sequence based on the obtained phase current information.

Abstract: A motor driving apparatus includes an amplifier receiving, from a detector, a sine wave shaped signal detected in response to rotation of a motor, and amplifying the signal with a set amplification factor, an A/D converter for performing digital conversion by sampling the signal amplified by the amplifier at a sampling timing in a predetermined cycle, an amplification factor setting part for changing setting of the amplification factor of the amplifier, and an amplification factor set timing command part for issuing a command with respect to a timing for changing the setting of the amplification factor by the amplification factor setting part. The amplification factor set timing command part issues the command with respect to the timing so that a waveform stabilizing period until distortion in a waveform of the signal occurring when the amplification factor setting part changes the setting is stabilized does not overlap with the sampling timing.

Abstract: The invention relates to a system for generating sets of control data for networked robots, comprising a plurality of robots (Ri), wherein i=1, 2, 3, . . . , n, and n?2, an optimizer (OE) and a database (DB), which are networked via a data network, wherein each robot (Ri) includes at least: a control unit (SEi) for controlling and/or regulating the robot (Ri); a storage unit (SPEi) for controlling sets of control data SDi(Ak), which in each case enable the control of the robot (Ri) in accordance with a predetermined task (Ak), wherein k=1, 2, 3, . . .

Abstract: A power conversion apparatus capable of improving an EMI characteristic and an air conditioner including the same are disclosed. The power conversion apparatus includes an inverter including a plurality of switching elements corresponding to three phases, a gate driver configured to drive the switching elements of the inverter, and a noise reducer connected to the gate driver and configured to set switching noise occurrence times caused by the switching elements in the respective phases to be different.

Abstract: A power tool includes a motor, a connecting unit, and a controller. The connecting unit is configured to be connected to a secondary battery. A voltage detection unit is configured to detect a voltage of the secondary battery connected to the connecting unit. The controller is configured to acquire change of the detected voltage. The controller restricts the operation of the motor when the change of the voltage is a first value.

Abstract: A method according to an exemplary aspect of the present disclosure includes, among other things, detecting a position, including a polarity, of a rotor to detect incorrect rotor position offset of an electric machine without generating torque or motion within the electric machine.

Abstract: Provided is a control device for a permanent magnet-type rotating electrical machine (100), which includes a current coordinate transformation unit (109) configured to output a d-axis current and a q-axis current by coordinate transformation of three-phase AC currents respectively detected by current detection units (111, 112, 113), a current correction direction calculation unit (108) configured to calculate a current correction direction through use of the d-axis current and the q-axis current, and a current correction amount addition unit (102) configured to correct a d-axis current command and a q-axis current command based on the current correction direction. In this manner, an induced voltage is converged to lie within a maximum voltage circle in accordance with a power supply voltage.

Abstract: Provided herein are systems, methods, and software for improving drive efficiency in an industrial automation system. In one implementation, a system comprises a mechanical load, an electromechanical device attached to the mechanical load, and a drive coupled to the electromechanical device. A processor is programmed to generate and display an acceleration curve, a duplicate acceleration curve, an energy curve and a duplicate energy curve. A user input is received indicating a change to at least a portion of the duplicate acceleration curve, and a change to the duplicate energy curve is calculated and displayed. A modified command signal based on the user input is calculated, and the drive is configured to control the electromechanical device via the modified command signal to mechanically operate the mechanical load perform a task.

Abstract: A power conversion apparatus and method are provided. The apparatus includes a main battery and a power converter configured to execute a high power conversion mode that generates a high power and a low power conversion mode that generates a low power using an input power from the main battery. Additionally, an auxiliary battery is configured to receive and charge the low power and an inverter is configured to convert the high power to a driving power for driving a motor.