Abstract: A motor control device includes a movement command generator that outputs a movement command of a motor, a filter that performs filter processing of the movement command and outputs the filtered movement command, and a position controller that performs a position control of the motor. The filter is an infinite impulse response digital filter that is represented by a transfer function H(z): H(z)=(b0+b1·z?1+b2·z?2)/{1?(a1·z?1+a2·z?2)} with filter coefficients a1, a2, b0, b1, and b2. The filter is configured to change the filter coefficient b0 in a first sample period, to change the filter coefficients a1 and b1 in a second sample period which follows the first sample period, and to change the filter coefficients a2 and b2 in a third sample period which follows the second sample period.

Abstract: A winch control system having a solid state winch contactor and a boost power supply for a vehicle equipped with an electric winch and especially for off-road vehicles, is disclosed. This invention automatically provides three winch speeds: a “slow start” (“creep”) speed for “parking” the hook and for “sneaking” up on a load, a normal speed for normal winch operation and a fast speed for taking less time to unwind and rewind the winch rope when there is no load on the winch. Protection features for the winch contactor and/or the winch include, but are not limited to, electronic winch motor braking, current limiting, over temperature, undervoltage and reverse battery. Winch current limiting is adjustable from 100 amps to 300 amps, chosen for the purpose of accommodating various winch sizes.

Abstract: A DC electric motor having a stator mounted to a substrate, the stator having a coil assembly having a magnetic core, a rotor mounted to the stator with permanent magnets distributed radially about the rotor, the permanent magnets extending beyond the magnetic core, and sensors mounted to the substrate adjacent the permanent magnets. During operation of the motor passage of the permanent magnets over the sensors produces a substantially sinusoidal signal of varying voltage substantially without noise and/or saturation, allowing an angular position of the rotor relative the substrate to be determined from linear portions of the sinusoidal signal without requiring use of an encoder or position sensors and without requiring noise-reduction or filtering of the signal.

Abstract: A method of determining the position of a rotor of a brushless permanent-magnet motor is provided. The phase winding is freewheeled when a phase current exceeds an upper threshold. The method further includes measuring a parameter that corresponds to either: (i) the magnitude of the phase current during or at the end of freewheeling when the phase winding is freewheeled for the fixed period of time, or (ii) the time interval between the start and end of freewheeling or the start and end of excitation when the phase winding is freewheeled until the phase current falls below the lower threshold. The measured parameter is then used to define a saturation threshold. The phase winding is subsequently excited and freewheeled in the same manner, and the parameter is measured again. The method then compares the measured parameter against the saturation threshold, and determines that the rotor is at a predetermined position.

Abstract: Technical solutions are described for a motor control system of a motor to compute a disturbance estimate and use the disturbance estimate to improve the performance of the motor control system. For example, the motor control system includes an observer module that receives an input voltage signal of the motor. The motor control system also receives an output current signal from the motor. The motor control system further computes the disturbance estimate of the motor control system based on a plant model of an electrical subsystem of the motor control system.

Abstract: A method of controlling a brushless permanent-magnet motor that includes sequentially exciting and freewheeling a phase winding of the motor is provided. The phase winding is freewheeled when the phase current exceeds an upper threshold. The method further includes measuring a parameter that corresponds to either: (i) the magnitude of the phase current during or at the end of freewheeling when the phase winding is freewheeled for the fixed period of time, or (ii) the time interval during freewheeling or during excitation when the phase winding is freewheeled until the phase current falls below the lower threshold. The measured parameter is then compared against a saturation threshold, and the rotor is determined to be at a predetermined position. In response to determining that the rotor is at the predetermined position, the phase winding is commutated after a commutation period has elapsed.

Abstract: At least one example embodiment discloses a method of estimating a position of a rotor in a motor. The method includes obtaining a current regulation quality index based on a current command and a measured current, determining an estimated position of the rotor based on the current regulation quality index and position estimation data and controlling the motor based on the estimated position of the rotor.

Abstract: A servo controller includes a speed command creation unit, a torque command creation unit, a speed detection unit, a speed control loop, a speed control gain, a filter, a parameter storage unit, a sinusoidal disturbance input unit, a frequency characteristics calculation unit, and a parameter adjustment unit. The parameter storage unit stores a history of past frequency characteristics obtained by the frequency characteristics calculation unit in correlation with past parameter history.

Abstract: A servo controller includes a speed command creation unit, a torque command creation unit, a speed detection unit, a speed control loop, a speed control gain, a sinusoidal disturbance input unit, an actual frequency characteristics calculation unit, a reference characteristics changing unit, a reference frequency characteristics calculation unit, and a control gain adjustment unit.

Abstract: A method of estimating electric motor speed. The method determines whether a sequential cycle of the electric motor has occurred. The method calculates a correction factor for each of the Hall states. Where a sequential cycle of the electric motor has occurred, the method also calculates an update quality factor for the correction factors of the sequential cycle. The method updates the correction factors utilizing the update quality factor. Utilizing the updated correction factors, the method updates the electric motor speed signal.

Abstract: [Problem] An object of the present invention is to provide an electric power steering apparatus that can perform an angle estimating by using a motor regenerative current so as to accurately perform an angle estimating even in a low speed steering. [Means for Solving the Problem] The present invention is the electric power steering apparatus that calculates a current command value based on at least a steering torque, driving-controls a motor, which applies an assist torque to a steering system based on the current command value, by an inverter with respective phase duties of a PWM, and detects an angle of the steering system or the motor, comprising: an angle estimating section to estimate the angle when a detecting system of the angle is failed, wherein the electric power steering apparatus performs an assist-control based on an estimating angle that is estimated at the angle estimating section. The present invention can be also adapted to the control of the motor having multi-system windings.

Abstract: Methods and apparatus to control architectural opening covering assemblies are disclosed herein. An architectural covering assembly including an architectural covering; a tube to which the architectural covering is coupled; a manual controller operatively coupled to the tube to rotate the tube; a motor including a motor housing and a motor shaft; and a clutch assembly including a clutch and a clutch housing in which the clutch is disposed, the motor shaft coupled to the clutch and the clutch coupled to the manual controller to hold the motor shaft substantially stationary when the architectural covering is moved under an influence of the motor to cause the motor housing to rotate with the clutch housing and the tube.

Abstract: The invention relates to an architecture which is applied to a six-phase rotary electric machine of the type comprising first and second three-phase systems offset angularly at a predetermined offset angle. First and second phase windings of the three-phase systems respectively carry first (U1, V1, W1) and second (U2, V2, W2) phase currents controlled by electronic power modules (15, 16, 17). The electronic modules comprise first and second power terminals (12, 13) each capable of being electrically connected to first and second instances of the first and second phase windings. According to the invention, the electronic power modules are interconnected such as to balance the losses.

Abstract: A motor control device at least includes a speed control part for controlling a motor rotation speed. The motor control device includes a torque correction means for suppressing variation in torque constant due to individual differences of motors. In addition, the motor control device corrects the torque constant by using a correction torque coefficient calculated based on an unloaded speed when a fixed voltage is applied. Alternatively, the torque constant is corrected using the correction torque coefficient calculated based on the motor applied voltage when the motor speed is fixed.

Abstract: A motor driving device comprises a first arithmetic section calculating a rotational speed and a magnetic pole electrical angle of a motor rotor, a current command setting section setting a d-axis current command and a q-axis current command in a rotating coordinate dq system based on a difference between the rotational speed and a target rotational speed, a driving command generating section generating a sinusoidal wave driving command based on the d-axis current command, the q-axis current command, the rotational speed and the magnetic pole electrical angle and a PWM signal generating section. When the rotational speed has a positive value indicating a positive rotational state, the current command setting section sets the q-axis current command of acceleration driving, and when the rotational speed has a negative value indicating a reverse rotational state, the current command setting section sets the q-axis current command of deceleration driving.

Abstract: A load parameter setting device includes: a storage unit that stores a plurality of load parameters corresponding to a plurality of types of workpieces to be gripped by the robot respectively; an index calculation unit that calculates, for each of the plurality of stored load parameters, an index for selection of the load parameter of the workpiece gripped by the robot based on a current position and orientation of the robot; and a selection unit that selects the load parameter of the workpiece from among the plurality of load parameters stored in the storage unit based on the calculated index.

Abstract: Provided is a trace data collection system, including: a controller including: a trace start signal transmission determination unit configured to determine a condition for transmitting a trace start signal; and a trace start signal transmission unit configured to transmit the trace start signal; and a motor control device including: a trace start signal reception unit configured to receive the trace start signal; a trace start determination unit configured to set at least reception of the trace start signal as a trace start condition; and a first trace data collection unit configured to collect first trace data relating to a motor.

Abstract: Ripple power having a first variation range is input into a DC link (DC power supply lines). Buffer power is provided and received between the DC link and a power buffer circuit, so that the DC link outputs DC power having a second variation range smaller than the first variation range. An inverter receives the DC power as an input, and outputs AC power to a motor. A power control unit controls the power buffer circuit and the inverter on the basis of a compensation rate that sets the second variation range. A compensation rate setting unit performs a setting in which the compensation rate when a rotational speed of the motor belongs to any of a plurality of first predetermined ranges is higher than the compensation rate when the rotational speed belongs to a second predetermined range other than the plurality of first predetermined ranges.

Abstract: A power converter for a three-phase electric rotary machine including first and second winding sets includes: first and second inverters corresponding to the first and second winding sets, respectively; and a control unit including a command calculation unit that calculates first and second voltage command values related to voltages to be applied to the first and second winding sets, and an excess correction unit that corrects first and second voltage command corresponding values corresponding to the first and second voltage command values. When one of the first and second voltage command corresponding values exceeds a limitation value which is set in accordance with a voltage capable of being outputted, the excess correction unit performs an excess correction process for correcting the other of the first and second voltage command corresponding values in accordance with an excess amount over the limitation value.

Abstract: In a rotary electrical machine control apparatus, a selection section selects a relay current limiting value or a coil current limiting value depending on whether a plurality of systems are operated or one or more but not all of the plurality of systems are operated. The system is a combination of a winding set, an inverter, and a power supply relay, which correspond to each other. The relay current limiting value is a current limiting value calculated based on the temperature of the power supply relay. The coil current limiting value is a current limiting value calculated based on the temperature of a choke coil.