Abstract: The invention relates to a method for detecting the rotary angle positions (?, ?) of rotating parts of a wiper motor, the wiper motor having a brushless electric motor as a first part which comprises a rotor rotating about a first axis of rotation and which drives a gear wheel as a second part which rotates about a second axis of rotation and which comprises a driven shaft, and the rotary angle positions (?, ?) of the two rotating parts being detected by means of two sensor devices each having a signal generating element and a sensor element for detecting a changing physical parameter of the signal generating element.

Abstract: A power tool system including a battery pack and a power tool. The power tool includes a power tool housing, a drive unit located within the housing, and a power tool controller located within the housing. The power tool controller is configured to receive a signal from the battery pack (for example, a battery pack controller), the signal indicative of a temperature (for example, a temperature of the battery pack); determine whether the temperature is between a lower temperature threshold and an upper temperature threshold; and limit a power to a drive unit if the temperature is between the lower temperature threshold and the upper temperature threshold.

Abstract: Method and apparatus for providing a motor controller/driver integrated circuit package having diagnostic processing of signal(s) from a magnetic field sensor positioned in relation to a motor. The sensor signal may have a first voltage range corresponding to a valid high state and a second voltage range corresponding to a valid low state. A diagnostic module can process the received signal from the magnetic field sensor to determine whether the received signal has a voltage level within the first or second voltage ranges. An output module may generate an output signal having a state based on the whether the received signal has a voltage level within the first or second voltage ranges.

Abstract: An apparatus and method for automatically adjusting and monitoring use of an adjustable standing desk are disclosed. The invention provides an electric adjustable desk with memory to store a user's preferred sitting and standing heights for the adjustable desk. A setup mode allows the user to store and adjust the preferred sitting and standing heights. A sensor allows the user to quickly adjust from the sitting to standing heights or vice versa.

Abstract: A permanent-magnet-synchronous electric motor control device includes: a reference voltage value calculation unit for calculating a reference voltage value; an output voltage value calculation unit for calculating an output voltage value on the basis of a voltage command; a current weakening command calculation unit for calculating a current weakening command on the basis of the reference voltage value and the output voltage value; a voltage command calculation unit for calculating the voltage command on the basis of the current weakening command; and a power converter for supplying power to a permanent-magnet-synchronous electric motor on the basis of the voltage command. The current weakening command calculation unit calculates the current weakening command in which a high-frequency component is amplified on the basis of the difference between the reference voltage value and the output voltage value.

Abstract: A microgrid control system that can govern power provided to a load from various power sources. The microgrid control system can determine apportionment of power between the various sources based on characteristic power features of the various sources.

Abstract: A vibration suppression method for a servo motor and a load multistage drive system is provided. For a number N of fixed vibration frequencies and one vibration frequency varying with a load position existing in a multistage drive mechanism, a number of N+1 vibration suppression filters are adopted, and each filter is configured to eliminate a corresponding vibration frequency. Fixed vibration frequencies and a vibration frequency varying with a load position in a multistage drive system are measured by using an offline method, and the varied vibration frequencies are made into a two-dimensional table related to the load positions. The fixed vibration frequencies are eliminated by using fixed-frequency parameter vibration suppression filters; and the varied vibration frequencies are eliminated by using a variable-frequency parameter vibration suppression filter, and the vibration frequencies are obtained in real time according to the load positions and the two-dimensional table.

Abstract: A control assembly for controlling a speed or torque of operation of an electric device includes a control assembly housing, a magnetic sensor, a magnetic element; and an actuator. The actuator moves relative to the control assembly and, responsive to that movement, the magnetic sensor and magnetic element are moved relative to each other between a first position and a second position so that the magnetic sensor senses a first magnetic field reading when in the first position and senses a second magnetic field reading when in the second position. A control module is operably connected to the magnetic sensor and configured for controlling the electric device, and a magnetic shielding element is positioned within the control assembly housing to alleviate a magnetic signal source external to the control assembly from interfering with the sensing by the magnetic sensor.

Abstract: A method of controlling an electric motor of a vehicle includes monitoring torque command signals from a vehicle system to the electric motor, each torque command signal configured to cause the electric motor to output a commanded torque, and monitoring a speed of the vehicle and an output torque of the electric motor, the output torque responsive to a drive signal generated based on the torque command signals. The method also includes, based on the output torque and the vehicle speed indicating a low motor efficiency condition, modulating the drive signal between a first torque value and a second torque value that is less than the first torque value, the first torque value greater than the commanded torque and selected to increase an efficiency of the electric motor.

Abstract: An electric tool includes an AC motor (an electric motor) and a control unit. The AC motor includes a permanent magnet and a coil. The control unit is configured to perform control on operation of the AC motor. The control performed by the control unit includes field weakening control. In the field weakening control, the control unit causes a flux-weakening current to flow through the coil. The flux-weakening current is a current that generates, in the coil, a magnetic flux that weakens a magnetic flux of the permanent magnet.

Abstract: A control device that can prevent the deterioration of temperature estimation accuracy in a rotating electric machine due to its aging deterioration is provided. The control device (10) includes a correction unit (13) to correct at least one of thermal resistance, heat generation, and thermal capacity, which are physical quantities to build a thermal circuit model (30-1) covering a thermal circuit of a rotating electric machine (1), wherein the correction unit (13) corrects at least one of the thermal resistance, the heat generation, and the thermal capacity at a measurement position by using measurement information including temperature (T31) or thermal flow (U32) measured by a sensing unit (8) at the measurement position in the rotating electric machine (1).

Abstract: This application provides a permanent-magnet synchronous machine control method and device, and a permanent-magnet synchronous machine control system. The method includes: obtaining a d-axis current id and a q-axis current iq in a permanent-magnet synchronous machine control loop at a current moment; obtaining a fifth-order harmonic current id5th and a seventh-order harmonic current id7th in the d-axis current id in the permanent-magnet synchronous machine control loop at the current moment, and a fifth-order harmonic current iq5th and a seventh-order harmonic current iq7th in the q-axis current iq in the permanent-magnet synchronous machine loop at the current moment; determining a d-axis current idk+1 at a next moment in each switch state; determining a q-axis current iqk+1 at the next moment in each switch state based on the first current idk, the second current iqk, and the second voltage in each switch state; and determining a control policy of the permanent-magnet synchronous machine.

Abstract: The disclosure relates to a method for operating a steering system of a motor vehicle. A voltage reserve is determined as a function of a compensation trajectory for a second actuating voltage and as a function of a modulation limit. A first actuating voltage with a fundamental frequency is determined as a function of the voltage reserve. A compensation voltage with a sixth-order harmonic with respect to the fundamental frequency of the first actuating voltage is determined. The second actuating voltage is determined for an inverter as a function of the first actuating voltage and as a function of the compensation voltage.

Abstract: A modular robot system is capable of being configured to allow a plurality of cube-shaped unit robots to be coupled to one another. The modular robot system has N cube-shaped unit robots (where N is an integer greater than 2), each cube-shaped unit robot including: a cube-shaped housing; a step motor located inside the housing; and a controller located inside the housing to control the step motor, wherein the housing has a mounting groove formed on one surface thereof to mount a rotary body rotating by a rotary shaft of the step motor thereon and connection grooves with the same shape as each other formed on the five surfaces thereof, so that through connectors mounted on the connection grooves, one cube-shaped unit robot is connectable to another cube-shaped unit robot.

Abstract: A motor controlling circuit is provided. A first terminal of a first high-side transistor and a first terminal of a second high-side transistor are coupled to a common voltage. A first terminal of a first low-side transistor is connected to a second terminal of the first high-side transistor. A first node between the first terminal of the first low-side transistor and the second terminal of the first high-side transistor is connected to a first terminal of a motor. A first terminal of a second low-side transistor is connected to a second terminal of the second high-side transistor. A second node between the first terminal of the second low-side transistor and the second terminal of the second high-side transistor is connected to a second terminal of the motor. The driver circuit regulates at least one of the transistors such that no current flows to the common voltage.

Abstract: A motor control device includes a third harmonic calculation unit configured to calculate a first third harmonic on a basis of an average value between a voltage command value of a maximum phase with a maximum duty ratio and a voltage command value of a minimum phase with a minimum duty ratio among three-phase voltage command values; an amplitude calculation unit configured to calculate an amplitude of the three-phase voltage command values; a third harmonic conversion unit configured to convert the first third harmonic into a second third harmonic on a basis of the first third harmonic and the amplitude; a correction unit configured to correct the three-phase voltage command values by subtracting the second third harmonic from the three-phase voltage command values.

Abstract: A linear resonant device and a braking method for the same. The linear resonant device comprises a linear resonant motor and a drive chip. The drive chip pre-stores a drive waveform and at least one first braking waveform therein. The method comprises: determining, in response to a braking instruction, whether vibration of the linear resonant motor meets a first condition while being driven by the drive waveform; and if so, controlling the drive chip to drive, by using the first braking waveform, the linear resonant motor and to conduct a first braking process for the linear resonant motor, wherein the first braking waveform comprises at least two pulse waveforms, and an amplitude value of each of the at least two pulse waveforms gradually decreases along a propagation direction of the first braking waveform.

Abstract: A motor controller comprises a switch circuit, a driving circuit, and a pulse width modulation circuit. The switch circuit is coupled to a three-phase motor for driving the three-phase motor. The driving circuit generates a plurality of control signals to control the switch circuit. When the motor controller starts a floating phase for detecting a phase switching time point, the motor controller enables that at least one transistor within the switch circuit is operated in a linear region. The motor controller is configured to reduce switching noise of the three-phase motor and increase a success rate of phase switching.

Abstract: A motor control determines if a motor is rotating at steady state velocity and then populates a table with information about each individual motor sector. At steady state velocity, the duration of the motor within an electrical sector is measured. The duration of the complete mechanical rotation of the motor is determined. The controller determines a ratio of the measured duration of the sector to a duration of a complete mechanical rotation of the motor. The ratio of sector duration to rotation duration is stored in a table. The controller is configured for controlling the motor using the table values.

Abstract: A control device includes first and second input terminals to which a DC voltage for driving a motor is input, and a control unit. The control unit sets a rotation direction of the motor based on first input to the first input terminal or the second input terminal. A rotation speed of the motor is changed based on a subsequence input of the DC voltage.