Abstract: A rotary electric machine is equipped with a stator and a rotor. The rotor has a d-axis magnetic circuit that is produced by a magnetomotive force of a field winding, and magnet magnetic circuits that are produced by a magnetic force of permanent magnets. The d-axis magnetic circuit and a q-axis magnetic circuit have at least a part thereof that is common to both. The permeance of the d-axis magnetic circuit is smaller than the permeance of the q-axis magnetic circuit, when a load is being applied to the rotor. A control apparatus of the rotary electric machine has a switching circuit that controls the field current in the field winding, and a control section that makes the switching frequency of the switching circuit become higher when the field current is above a threshold value than when the field current is less than or equal to the threshold value.

Abstract: An apparatus includes an inverter configured to be connected to a load, a driver having an output coupled to control terminals of transistors of the inverter and a control input configured to receive control vectors and responsively apply control signals to control terminals of the inverter, a desaturation detector configured to detect desaturation of the transistors, and a controller coupled to the control input of the driver and configured to apply at least one test vector that causes the driver to turn on selected ones of the transistors for a duration sufficient for the desaturation detector to detect desaturation of at least one of the selected transistors and to enable or inhibit further operation of the inverter responsive to the desaturation detector. The load may be a motor and the controller may be configured to apply the at least one test vector responsive to a command to start the motor.

Abstract: A temperature prediction device includes an application voltage specifying unit which specifics a voltage value applied to an electromagnetic coil based on a distance from a distance detection unit provided in the electromagnetic coil to an output shaft, a coil current detection unit which detects a current value flowing when a voltage is applied to the electromagnetic coil on the basis of the voltage value specified by the application voltage specifying unit, and a coil temperature estimation unit which estimates a temperature of the electromagnetic coil on the basis of the voltage value specified by the application voltage specifying unit, the current value detected by the coil current detection unit, and a relational expression between the voltage value applied to the electromagnetic coil, the current value flowing when a voltage is applied to the electromagnet coil on the basis of the voltage value applied to the electromagnetic coil, and the temperature of the electromagnetic coil.

Abstract: A device for estimating inductances of an electric machine having a salient-pole rotor is presented. The device comprises a processing system that controls stator voltages to constitute a balanced multi-phase alternating voltage when the rotor is stationary. The processing system estimates a position of the rotor based on a negative sequence component of stator currents. To estimate the quadrature-axis inductance, the processing system controls direct-axis current to be direct current and quadrature-axis voltage to be alternating voltage. The quadrature-axis inductance is estimated based on the quadrature-axis alternating voltage and on quadrature-axis alternating current. To estimate the direct-axis inductance, the processing system controls direct-axis voltage to be alternating voltage and the quadrature-axis voltage to be zero. The direct-axis inductance is estimated based on the direct-axis alternating voltage and on direct-axis alternating current.

Abstract: Controllers for controlling hybrid motor drive circuits configured to drive a motor are provided herein. A controller is configured to drive the motor using an inverter when a motor commanded frequency is not within a predetermined range of line input power frequencies, and couple line input power to an output of the inverter using a first switch device when the motor commanded frequency is within the predetermined range of line input power frequencies.

Abstract: A rotary operating device includes an operation part that is rotatable according to an operation by an operator, a rotation angle sensor that detects a rotation angle of the operation part, a torque applier that applies application torque to the operation part along a rotation direction of the operation part, a frictional force applier that applies a frictional force to the operation part, and a processor programmed to change the application torque and the frictional force according to the rotation angle.

Abstract: A motor drive system includes a converter configured to convert power between AC power in a power source and DC power in a DC link, an inverter for drive configured to convert power between the DC power and AC power in a servomotor for drive, a motor control unit for drive configured to control the servomotor for drive, a power storage device configured to store the DC power from the DC link or supplies the DC power to the DC link, and a determination unit configured to determine whether the holding energy of the power storage device is lower than a threshold for energy shortage determination, wherein when the holding energy is lower than the threshold for energy shortage determination, the motor control unit for drive controls the servomotor for drive by setting an additional standby period in which the servomotor for drive is inactive in a predetermined operation pattern.

Abstract: The present disclosure relates to a power system including: a plurality of Electronic Control Units (ECUs) configured to transfer power to a motor connected to an output terminal; a temperature section determination unit configured to determine whether first temperature information input from a first temperature sensor which senses the temperature generated from a first ECU corresponds to a normal section, a warning section, or a danger section, which are set in advance; a temperature comparison determining unit configured to determine whether the first temperature information is less than or equal to second temperature information input from a second temperature sensor which senses the temperature generated from a second ECU, in a case in which it is determined that the first temperature information corresponds to the warning section; and a controller configured to control the first ECU so that the first ECU reduces the power in a case in which it is determined that the first temperature information is less

Abstract: A motor control device for controlling a servomotor to axially move a movement target object includes: a speed detector for detecting the movement speed of the movement target object; an abnormality detector for detecting an abnormality of the speed detector; a motor controller for performing deceleration control on the servomotor to decelerate the movement target object, upon detection of the abnormality; a reference speed generator for generating a reference speed that decreases with passage of time, based on the movement speed when the movement target object decelerates and a predetermined deceleration; a speed monitor for monitoring the movement speed and determining whether or not the movement speed is equal to or greater than the reference speed; and a brake controller for actuating a brake for braking axial movement of the movement target object when the movement speed is determined to be equal to or greater than the reference speed.

Abstract: An electric power steering apparatus includes a motor, a controller including electrical components mounted on a substrate, and a connector unit including a cover that includes a first connector and a second connector, the first and second connectors connecting power and signals, in which each of the first connector and the second connector comprises a power supply part and a signal connection part, each of the power terminal and the signal terminal extend from the substrate in an axial direction of the motor, each of the power terminal and the signal terminal extend through the cover, each of the first connector and the second connector are arranged within a silhouette of the motor along the axial direction of the motor, each of the first connector and the second connector comprises an opening positioned on a side of the cover opposite the motor in the axial direction of the motor, the first connector and the second connector connect to and disconnect from the harness in a direction substantially parallel to

Abstract: A linear actuator comprises a brushless DC motor (31), a driver circuit (51) for providing a multiphase voltage signal to the motor (31) and a controller (58) for detecting a rotor position and providing control signals to the driver circuit (51) in dependence thereof. Detector circuitry (61) detects a signal indicative of rotor speed. The controller (58) is configured to control the driver circuit (51) to drive the motor with a first waveform of the multiphase voltage signal, when the indicative signal indicates that the rotor speed does not exceed a predetermined speed; and control the driver circuit (51) to drive the motor with a second waveform of the multiphase voltage signal, when the indicative signal indicates that the rotor speed exceeds the predetermined speed, wherein the second waveform is selected to drive the motor (31) with an efficiency less than the efficiency when driven by the first waveform.

Abstract: This motor driving control apparatus has (A) an inverter unit configured to drive a motor; (B) a separation switch configured to separate a power source from the inverter unit; and (C) a controller configured to instruct the separation switch to separate the power source from the inverter unit and control the inverter unit to perform switching according to a speed and a braking target torque, upon detecting an event that braking should be performed without passing a regenerative current to the power source from the inverter unit. By introducing the separation switch that operates as described above, it becomes possible to perform control so as to consume the power by the motor itself without passing the regenerative current to the power source such as a battery.

Abstract: Actuators for carrying and actuating a lens having a first optical axis, the lens receiving light folded from a second optical axis substantially perpendicular to the first optical axis, comprising first and second VCM engines coupled to the lens and first and second linear ball-guided rails operative to create movement of the lens in two substantially orthogonal directions upon actuation by respective VCM engines.

Abstract: A motor control system includes a motor having an output line, motor control circuitry that includes DC bus lines and a smoothing capacitor between the DC bus lines and converts DC power supplied from outside the motor control circuitry into AC power and supply the AC power to the motor as driving power, and short circuit circuitry that, while the motor control circuitry is not supplying the driving power to the motor, makes a short circuit between the output line of the motor and a negative line of the DC bus lines of the motor control circuitry.

Abstract: A method of starting a sensorless BLDC motor. The method includes: providing a stator flux rotating coordinate system including a ds-axis and a qs-axis, selecting a voltage Vds on the ds-axis, allowing a voltage Vqs on the qs-axis to be 0, and resetting a to-be-started motor to a preset position; providing a flux ? to the motor, allowing the current Iqs on the qs-axis to rise, maintaining the flux constant, calculating a real-time torque T1 according to the torque/current closed loop on the qs-axis, comparing a preset starting torque T0 with the real-time torque T1, performing the torque/current closed-loop control until the real-time torque T1 reaches the preset starting torque T0; and continuously raising the real-time torque according to the torque/current closed loop to operate a load, measuring a real-time rotation speed V1, comparing a preset starting rotation speed V0 with the measured real-time rotation speed V1.

Abstract: A signal processor is configured to perform a process equivalent to performing a series of fixed-to-rotating coordinate conversion, a predetermined process and then rotating-to-fixed coordinate conversion, while maintaining linearity and time-invariance. The signal processor performs a process given by the following matrix G: G = [ F ? ( s + j ? ? ? 0 ) + F ? ( s - j ? ? ? 0 ) 2 F ? ( s + j ? ? ? 0 ) - F ? ( s - j ? ? ? 0 ) 2 ? j - F ? ( s + j ? ? ? 0 ) - F ? ( s - j ? ? ? 0 ) 2 ? j F ? ( s + j ? ? ? 0 ) + F ? ( s - j ? ? ? 0 ) 2 ] where F(s) is a transfer function representing the predetermined process, ?0 is a predetermined angular frequency and j is the imaginary unit.

Abstract: Robotic gripper fingers are disclosed. A gripper assembly includes a first finger defining a first object engagement face and a second finger defining a second object engagement face. The first object engagement face of the first finger opposes the second object engagement face of the second finger. The gripper assembly also includes at least one actuator in communication with the first finger that is configured to actuate the first finger relative to the second finger. The gripper assembly includes at least one first sensor facing outward from the first object engagement face. The at least one first sensor is configured to detect objects to be manipulated by actuating the first finger relative to the second finger.

Abstract: This discloses apparatus including, but not limited to, an all Direct Current (DC) energy transfer circuit, a energy transfer controller, an all-DC energy transfer network, components of use in such circuits, and application apparatus that benefits from including and/or using the all-DC energy transfer device and methods of operating the above in accord with this invention. The application apparatus may include, but are not limited to, a hybrid electric vehicle, an electric vehicle, and/or a solar power device, in particular, a hybrid electric/internal combustion engine automobile.

Abstract: A method for determining a droop response profile of a rotating electrical machine supplying electricity to an electrical grid having a network frequency varying on either side of a nominal frequency, in which a measured value of the rotation speed of the rotating machine is retrieved, and the droop response parameters dependent on the measured speed value are defined. The droop response profile is a graph centered on the coordinates of an origin point between 99% and 101% of the measured speed and defined by at least two points of coordinates in the case of underspeed and/or by at least two points of coordinates in the case of overspeed, each of the points having for its abscissa a speed value as a percentage of the measured speed, and for the ordinates, a filtered speed value as a percentage of the measured speed modulated by at least one of the droop response parameters.

Abstract: In a variable speed generator-motor apparatus, a power converter includes six two-terminal arms each formed by serially connecting k unit converters that can output arbitrary voltage, an AC rotating electric machine includes an armature winding with 60-degree phase zone formed from a double layer coil, the armature winding being divided into first and second pole sides to form double star connection by binding neutral points and to be drawn out as two sets of three-phase terminals; three-phase terminals on the first pole side are connected to first terminals of three arms, and second terminals of the three arms are star-connected to a first terminal of a DC power supply; three-phase terminals on the second pole side are connected to second terminals of remaining three arms, and first terminals of the three arms are star-connected to a second terminal of the DC power supply.