Abstract: A device for the regulation of devices which can be regulated with a 0-10 Vdc and/or PWM command is herein disclosed, the device having at least one power supply input, at least one regulation input adapted to receive external regulation signals, a potentiometer comprising a selector element, the potentiometer being configured to provide a manual voltage regulation, and at least one command output configured to output a command signal towards the devices to be regulated. The device further comprises a switching element configured to cause a switching of said device between a first regulation mode, in which the command signal is generated by said device and is manually adjustable through the selector element of said potentiometer, and a second regulation mode, which allows a regulation of the devices to be regulated via the command signal from the command output based on an external device connectable to the regulation input. A system comprising the above device is also disclosed.

Abstract: A power tool includes a housing, a motor positioned within the housing, an output shaft driven by the motor, the output shaft configured to be coupled to an accessory for operation thereof, a sensing circuit configured to detect, during operation of the power tool, an operating characteristic of the motor, and a controller. The controller is configured to receive a signal from the sensing circuit representing the operating characteristic of the motor, compare the operating characteristic of the motor to a first predetermined threshold, and in response to the operating characteristic exceeding the predetermined threshold, perform a loss of control check on the power tool. Performing the loss of control check includes comparing a detected motion of the power tool to a second predetermined threshold, and tripping loss of control functionality based on whether the detected motion of the power tool exceeds the second predetermined threshold.

Abstract: Disclosed herein are a motor safety control method that can efficiently detect an abnormality of a motor sensor configured to sense a rotational motion of a motor and control a safety operation of the motor based thereon, and a robot for implementing the method. The motor safety control method for a robot may include receiving a first motor value from a high-resolution sensor of a motor, receiving a second motor value from a low-resolution sensor of the motor, and comparing a threshold with a difference between the first motor value and the second motor value, and transmitting an operation signal to a motor driver for the motor to continue or stop operation of the motor.

Abstract: A motor system designed to replace and internal combustion engine. The motor system may include an electric motor and a battery that provides power to the electric motor. The system may also include control electronics to control the battery discharge current. The battery discharge current may be a relatively low current if the motor speed is less than a first threshold. The battery discharge current may be a relatively high current if the motor speed is greater than the first threshold but less than a second threshold. The battery discharge current may be the relatively low current if the motor speed is greater than the second threshold but less than a third threshold.

Abstract: A current measurement apparatus includes a corrector. The corrector calculates an error arising in a measured value of at least one target phase current due to magnetic flux generated from each of multiphase power lines in accordance with an error factor defined for each multiphase power line with respect to the at least one target phase current. The error factor defined for each multiphase power line with respect to the at least one target phase current is a constant value or a variable determined based on (i) one or more shields located between the current sensor and the corresponding multiphase power line and (ii) a distance between the current sensor and the corresponding multiphase power line. The corrector corrects the measured value of the at least one target phase current based on the calculated error.

Abstract: A method for estimating the magnet temperature in an electrical machine carried out by means of an electronic computer involves estimating a value of a total magnetic flux of the electrical machine and estimating a value of a first partial flux, representing a magnetic flux due to a reluctance of the electrical machine. The method also involves the steps of calculating a value of a second partial flux as a function of a difference between said value of the total magnetic flux and said value of the first partial flux and determining a value of a magnet temperature as a function of said value of the second partial flux.

Abstract: Examples include a method for controlling a variable speed drive driving a three-phase electric motor. The method includes measuring current signals in the windings of the electric motor, and determining a current parameter associated to the electric motor based on the current signals. The current parameter includes either a current offset of at least one winding of the electric motor in relation to a zero-current value, or a current misbalance between windings of the electric motor. The method further includes determining an amended control law of the electric motor for decreasing the determined current parameter, and applying pulse width modulation signals on insulated gate bipolar transistors of the inverter based on the amended control law.

Abstract: A controller for a switched reluctance machine, the machine comprising two concurrently energised phases and two concurrently non-energised phases. The controller is configured to, in an injection stage, inject a signal into the two non-energised phases; in a measurement stage, determine a current in each of the two non-energised phases; and in a calculation stage, apply an algorithm to the determined currents to determine a rotor angle.

Abstract: A vehicle electronic device, a method for protecting vehicle electronic device and a non-transitory computer-readable storage medium are disclosed. The vehicle electronic device includes a motherboard, a connection unit, and a protection assembly. The motherboard includes a data storage module. The connection unit is configured to capture an interface signal. The protection assembly includes a memory, a sensing component, and a processor. The memory stores a default unlocking parameter. The sensing component is configured to obtain a spatial sensing parameter when activated. In response to the connection unit losing the interface signal, the processor compares the spatial sensing parameter obtained within an unlocking time with the default unlocking parameter. In response to the spatial sensing parameter not matching the default unlocking parameter and exceeding the unlocking time, the processor generates a clear signal. The data storage module deletes at least a portion of data based on the clear signal.

Abstract: An image reading device includes a DC motor, a roller driven by the DC motor, a reading unit configured to read an image from a document conveyed by the roller, and a control unit configured to control driving of the DC motor. The control unit is configured to detect a power load value of the DC motor. The control unit is configured to determine that the power load value of the DC motor exceeds a first threshold value in a state in which the control unit controls the DC motor to convey the document at a first conveyance velocity, and then, control the DC motor to convey the document at a second conveyance velocity lower than the first conveyance velocity.

Abstract: The present disclosure relates to a method for estimating a torque of an electric machine, comprising the following steps: estimating a first torque using a first method by forming a cross product from an estimated magnetic flux of the electric machine and an actual current of the electric machine, estimating a second torque using a second method by determining a power balance which can be calculated with the aid of a difference between an AC output power of an inverter, which is connected to the electric machine, and a total power loss of the electric machine, and determining the final torque as a weighted average from the first torque, which is weighted with a first weighting, and the second torque, which is weighted with a second weighting. The present disclosure also relates to a control unit for carrying out this method and to an electrical traction drive having such a control unit.

Abstract: A method of starting a rotor of a single-phase claw-pole motor, wherein the claw-pole motor comprises a permanently excited rotor having a plurality of detent positions, wherein the rotor performs movement in a running direction in nominal operation, comprises an electronically commutated stator, and comprises a Hall sensor for determining relative rotor position is disclosed. The method comprises the steps of starting of the rotor by at least one commutation of a stator winding due to a Hall sensor signal and generating a plurality of commutations by means of pulse width modulated phase voltage based on a Hall sensor signal, wherein the Hall sensor is mounted on the stator or on an electronic circuit board and is arranged offset with respect to a center position of a stator pole in the direction of rotation.

Abstract: An apparatus for a drive for an externally excited synchronous machine. The apparatus sets a value for a stator flux linkage reference so as to enable operation in a linear region of a d-axis magnetizing inductance without saturation. The apparatus causes the drive to drive the externally excited synchronous machine with a speed within a linear modulation range using said value. During the driving, the apparatus adjusts a rotor excitation current reference to determine a minimum-load value of a rotor excitation current and causes increasing or decreasing of the rotor excitation current until a stator current is within a pre-defined range. Then, the apparatus determines operating values for the stator and rotor excitation currents and calculates a rotor-to-stator reduction factor based on the minimum-load and operating values of the rotor excitation current, the operating value of the stator current and the value for the stator flux linkage reference.

Abstract: Disclosed are a motor control circuit and a control method. The control circuit includes: a power supply; a drive circuit; a pulse width modulation (PWM) signal generation circuit; a controller; and a reverse electromotive force detection circuit. The power supply is connected to the motor through the drive circuit; the drive circuit is connected to the controller through the PWM signal generation circuit; the controller is configured to control the drive circuit by changing a PWM signal frequency; the controller is connected to the motor through the reverse electromotive force detection circuit to obtain a reverse electromotive force parameter; the controller stores a correspondence between the reverse electromotive force parameter and the PWM signal frequency; the controller is further configured to receive the reverse electromotive force parameter and send the PWM signal frequency corresponding to the reverse electromotive force parameter to the drive circuit, for driving the motor.

Abstract: The present invention relates to a control mechanism (10) for a dispensing device (50). The control mechanism (10) includes a motor (12), a gear arrangement (14) operably connected to the motor (12); and an actuator (15) operably connected to the gear arrangement (14). In use, the actuator (15), under the operation of the motor (12), is configured to actuate an outlet (38) of a container (40) to dispense fluid from within the container (40). The gear arrangement (14) is configured such that a low torque motor (12) may be used to dispense the fluid.

Abstract: A control method for smart furniture includes a furniture body, a movable part, and a concealing part, a cavity for receiving the movable part being disposed on the furniture body, the concealing part part's deployed position for concealing the cavity and retracted position for exposing the cavity being provided on the furniture body, a first drive device and a second drive device being provided in the furniture body, inside the furniture body being further provided a sensor, a controller, and a receiving box, the controller being connected to the sensor and the receiving box; the control method is to control movements of the movable part and the concealing part based on the control instruction. The control method may realize position shift between the concealing part and the movable part to satisfy user needs, without interference arising during the switching process.

Abstract: A method for modulating torque of a vehicle propulsion motor driven by first, second and third cyclic currents mutually shifted by electrical angles of 120 degrees and applied in accordance with a rotating magnetic field by a rotor is provided with: applying pulse-width modulated voltage pulses respectively to switching devices to generate the first, second and third cyclic currents; and adding a phase shift to the first, second and third cyclic currents relative to the rotating magnetic field, or causing an amplitude modulation in the first, second and third cyclic currents.

Abstract: An electrical system having a plurality of power converters each having an input in electrical communication with a power source and an output in electrical communication with a load. A controller is configured to receive an output power request for the plurality of power converters. The controller can then select at least one power converter of the plurality of power converters to satisfy the output power request based on an efficiency of power conversion of each of the plurality of power converters and an operating lifespan of each of the plurality of power converters and direct the at least one power converter to produce power to satisfy the output power request.

Abstract: A motor starting circuit having a dead time setting mechanism is provided. The motor starting circuit includes a rotational speed detection circuit, a start-up commutation selector circuit, a control circuit, a driver circuit and an output stage circuit. The rotational speed detection circuit detects a rotational speed of a motor. The start-up commutation selector circuit determines whether or not to set a dead time within a motor start-up time interval to output a commutation instructing signal according to the rotational speed of the motor. The control circuit controls the driver circuit to drive the output stage circuit so as to start up the motor according to the commutation instructing signal.

Abstract: The invention relates to an expanded control scheme for an electrical machine (2). In particular, it is provided to change specifically into a freewheeling state in the event that only a low torque or a low phase current is to be set at the electrical machine (2). In order to change into the freewheeling state, additionally the actual rotational speed of the electrical machine (2) is taken into consideration.