Abstract: The invention relates to a method (19) for starting an electric single-phase induction motor (1), wherein during a start-up interval of the start-up cycle for starting said electric motor (1), the frequency (fref) of the electric current for driving said electric motor (1) is set to a first frequency (fstart), and later to the operating frequency (frun) of the electric motor (1), wherein the first frequency (fstart) is higher than the operating frequency (frun).

Abstract: Provided are a motor control method and a device, applicable in the technical field of motor control, and particularly applicable to a controller in a motor control system. The system comprises one controller and at least two motors, and each of the motors drives one drive entity. The method comprises: acquiring a control instruction at a current time, a positional relationship of drive entities, and a system state after a previous program cycle has ended; on the basis of the acquired information, and in combination with a pre-established mapping of transition relationships and transition conditions between all system states, determining, from the control instruction at the current time, a target system state corresponding to the system state after the previous program cycle has ended, determining, according to the target system state, a target control instruction, and controlling actions of all of the motors.

Abstract: A method for controlling a DC pump motor, preferably a brushed DC motor for pumping lubricant, which motor is controlled by a pulse-width modulated (PWM) control signal, wherein current parameters are acquired in an acquisition step and a duty cycle (D) of the PWM control signal (SPWM) is adapted and/or changed on the basis of the detected parameters in an adaptation step, wherein the acquisition of current parameters comprises at least the acquisition of a current input voltage (UB).

Abstract: Embodiments of the present disclosure include a motor controller with a processor and a machine readable medium. The medium includes instructions that, when loaded and executed by the processor, cause the processor to receive an estimated or sensed speed of a motor, extract a mechanical frequency component from the estimated or sensed speed, transform the mechanical frequency into direct quadrature (DQ) domain at the mechanical frequency, control the mechanical frequency to zero, and generate a dampening signal for torque based upon the controlled mechanical frequency.

Abstract: A system for providing both driving and charging functionality by using a plurality of traction inverters and a plurality of energy storage devices coupled to one another across the electric motor; an AC/DC converter front-end circuit interfacing the first/second traction inverters and the power source; a controller circuit configured to control operating characteristics of the AC/DC converter front-end circuit, wherein the first/second traction inverters are provided gating signals to one or more switching gates of the first/second traction inverters to shape power characteristics of power delivered to the first/second energy storage devices, from the power source.

Abstract: The brake driving control circuit, which controls an electromagnetic brake that releases the brake by applying a current, is provided with: a first rectifying element provided between a first power supply of a first circuit voltage and one terminal of the electromagnetic brake; a cut-off switch inserted into a line through which the first power supply supplies power; a first switching element provided between the other terminal of the electromagnetic brake and a ground point; and a second switching element and a second rectifying element provided in series between a second power supply of a second circuit voltage, which is different from the first circuit voltage, and the one terminal of the electromagnetic brake.

Abstract: Example systems and processes control transition of an electric motor from open-loop operation to closed-loop operation by detecting zero-crossing (ZC) locations of the back-electromotive force (BEMF). The rotor angle of the electric motor is changed, e.g., by changing acceleration of the electric motor to correct a phase difference based on the detected ZC locations and an open-loop profile of the electric motor. Detected ZC locations may be used to identify ZC-detected-based commutation points, and each detected ZC location may be used to update a next commutation point. During the control process the open-loop profile is updated. Transition may occur when a set number of ZC-detection-based commutation points are sufficiently aligned with corresponding updated commutation points, or such alignment is maintained for at least one electrical cycle.

Abstract: A vehicle includes a multi-core processor having first, second, and cores and having first and second analog-to-digital converters (ADC) associated with the first and second cores, respectively. The first and second ADC are configured to convert analog phase currents to first and second digital phase current values, respectively. The multi-core processor is configured to generate first and second rotor-angle data from digital signals representing a position of the electric machine. The processor is programmed to, via the first core, estimate a first output torque of the electric machine based on the first rotor-angle data and the first digital phase current values, via the second core, estimate a second output torque based on the second rotor-angle data and the second digital phase current values, and, via the third core, command de-activation of the electric machine in response to a difference between the first and second output torques exceeding a threshold.

Abstract: A sensor assembly includes a cylindrical sensor window defining an axis, and an annular member coupled to the sensor window and rotatable about the axis. The annular member includes a nozzle aimed at the sensor window and oriented at an acute angle from a radial direction toward the axis in a plane orthogonal to the axis.

Abstract: A bi-polar hybrid stepper motor includes a stator having a primary winding. The stator and the primary winding are positioned within a housing. A rotor has a magnetic component. The rotor is rotationally operable relative to the stator. An axial coil assembly is positioned within the housing and located proximate ends of the rotor and having a secondary winding. At least a portion of the magnetic component of the rotor is produced by the axial coil assembly in an energized state. The energized state produces an electromagnetic communication between the rotor and the stator.

Abstract: A surgical system for selective connection to a robotic arm includes an instrument drive unit and a surgical instrument detachably coupled to the instrument drive unit. The instrument drive unit includes a first actuator, a linkage member having opposing first and second portions, and a drive member. The first portion of the linkage member is operatively coupled to the first actuator such that actuation of the first actuator moves the first portion in a first direction and the second portion in a second direction opposite of the first direction. The drive member is operatively coupled to the second portion of the linkage member. The surgical instrument includes a driven member operatively associated with the drive member of the instrument drive unit and an end effector operatively coupled with the driven member, wherein translation of the driven member effects a first function of the end effector.

Abstract: A method and a circuit arrangement for damping stepper motor resonances during operation of a stepper motor, in particular in the medium and high speed range, is described, wherein the coils of the stepper motor are each connected into a bridge circuit comprising semiconductor switches, in order to impress into the coils a predetermined target coil current. The resonance damping is achieved by activating a passive FD-phase in the zero crossing of the target coil current, during which all semiconductor switches are opened or switched blocking, in order to thereby feed a coil current flowing in the related motor coil back into the supply voltage source either via inverse or body diodes and/or via diodes connected in parallel to the semiconductor switches in the reverse direction between the positive supply voltage and ground potential.

Abstract: A method for tension control in a band-shaped material between two tension points, in particular between two adjacent roll stands, wherein at least one of the tension points has a rotary drive as an actuator. In order to make known tension controls of this type more effective and faster the controller output signal is varied in connection with the conversion thereof into the actuating signal for the rotary drive, at least temporarily, in dependence on a variable representing the band-shaped material.

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: An electric motor drive device includes: a wire connection switching unit; an inverter; a control device controlling the wire connection switching unit and the inverter; and an overcurrent protection circuit preventing current exceeding a predetermined value from continuously flowing through the electric motor. The overcurrent protection circuit includes: determination circuits each correlated one-to-one with any one of possible wire connection states of a stator winding and determining whether current flowing through the inverter is abnormal; a combining circuit combining determination results; and an invalidation circuit invalidating a determination process by one or more of the determination circuits, and causing the combining circuit to output a determination result by the determination circuit correlated with a selected wire connection state of the stator winding.

Abstract: A motor driving apparatus including a driving circuit for supplying a first pulse with which a first coil included in a two-phase stepping motor generates a first magnetic flux, a second pulse with which a second coil included in the stepping motor generates a second magnetic flux opposite to the first magnetic flux, a third pulse with which the first coil generates the second magnetic flux, and a fourth pulse with which the second coil generates the first magnetic flux, to the stepping motor. The driving circuit supplies the second pulse, the third pulse, and the fourth pulse in this order to the stepping motor in a state of being stopped to start the stepping motor, and supplies the first pulse, the second pulse, the third pulse, and the fourth pulse in this order to the stepping motor after starting to continuously drive the stepping motor.

Abstract: An induction motor controller is provided. The induction motor controller includes a first module that derives a commanded stator voltage vector, in a rotor flux reference frame, via a rotor flux regulator loop and a torque regulator loop, which process at least partially in the rotor flux reference frame. The induction motor controller includes a second module that processes the commanded stator voltage vector to produce AC (alternating current) power for an induction motor.

Abstract: A numerical controller which can freely and easily specify, as a control point, various positions on a machine configuration and which can easily set coordinate systems in places on the machine configuration. A numerical controller expresses the machine configuration of a control target in graph form where constituent elements are nodes and holds the machine configuration. The numerical controller includes: a control point coordinate system specification portion that specifies, with the identifier, one or more groups of the control point and the coordinate system; a command value determination portion that uses the specified control point and the coordinate system to determine for which control point and on which coordinate system one or more command values commanded in a program correspond to a coordinate value; and a movement command portion that commands a move of the control point such that the coordinate value of the control point is the command value.

Abstract: Provided is an apparatus for operating a phase cut switch in a motor driven power steering apparatus. The apparatus for operating a phase cut switch in a motor driven power steering apparatus includes: a phase cut switch installed for an inverter for converting a voltage into 3-phase power and driving a driving motor and for each phase of input terminals of the driving motor; a gate driving unit configured to receive a driving signal from a control device and operate the phase cut switch; and a current circulation unit configured to circulate a counter electromotive force of the driving motor at an output terminal of the gate driving unit and an output terminal of the phase cut switch.

Abstract: A shift range control device is provided for a shift range switching system that includes a motor and a plurality of detectors. The motor has a plurality of winding sets. Each of the detectors is configured to detect a physical quantity that changes in accordance with rotation of the motor. The shift range control device includes a plurality of controllers configured to control switching of a shift range by controlling drive of the motor. Each of the controllers is provided to corresponding one of the winding sets and configured to acquire detection signals from the detectors, determine, based on the detection signals, a calculation signal having a same value between the controllers, and control, based on a target shift range and the calculation signal, a current supply to the corresponding one of the winding sets.