Abstract: An electric work machine includes a motor, a manipulator, a first switch, a second switch, and a control circuit. The manipulator is on-operated or off-operated by a user of the electric work machine. Each of the first switch and the second switch is turned on or off in response to the manipulator being on-operated or off-operated. The control circuit executes a motor control process in accordance with a computer program. The control circuit receives first switch information from the first switch, and receives second switch information from the second switch. The motor control process outputs a drive command for driving the motor in response to the first switch information and the second switch information indicating that the manipulator is on-operated.

Abstract: A method for controlling transient operation of a variable flux machine (VFM) includes, during a shunt angle transition, receiving a commanded and measured shunt angle when operating in a predetermined operating region, e.g., maximum torque per ampere or field weakening. The method includes calculating d-axis and q-axis delta current terms (?Id and ?Iq) required to maintain an output torque level of the VFM through a duration of the shunt angle transition, then applying the required ?Id and ?Id terms as feed-forward terms to adjust a d-axis current (Id) term and a q-axis current (Iq) term from a respective lookup table. In this manner the controller maintains the output torque level of the VFM during the shunt angle transition. An electric powertrain includes the VFM, a TPIM, and the controller. A PM machine may be controlled by substituting temperature for shunt angle.

Abstract: An electric power conversion apparatus includes a rotating electric machine including armature windings, a first inverter connecting the armature windings with a first storage battery, a second inverter connecting the armature windings with a second storage battery, a changeover switch configured to connect or disconnect between first and second positive buses or between first and second negative buses, and an operating unit configured to perform, with the changeover switch being in an ON state, first and second energization processes alternately. In the first energization process, electric current is supplied from the first storage battery to the second storage battery via the first inverter, at least one of the armature windings and the second inverter. In the second energization process, electric current is supplied from the second storage battery to the first storage battery via the second inverter, at least one of the armature windings and the first inverter.

Abstract: A method for compensating a signal of a motor includes acquiring an original signal and nonlinear parameters of the motor; calculating a compensation signal for the original signal according to the acquired nonlinear parameters; and loading the calculated compensation signal into the motor to excite the motor to vibrate. An electronic apparatus and a storage medium are also provided. In this method, the original excitation signal is compensated for nonlinearity according to the nonlinear motor parameters, and is then used for exciting the motor. Therefore, the actual vibration effect can be closer to the expected effect as designed, which can bring more desirable tactility experience.

Abstract: A control device for a ceiling fan may have a motor drive circuit configured to control a rotational speed of a motor of the ceiling fan, an occupancy sensing circuit, and a control circuit configured to adjust the rotational speed of the motor in response to a detected occupancy or vacancy condition. The control circuit may process the signals generated by the occupancy sensing circuit to eliminate the effects of vibrations and/or wobbling of the ceiling fan. The control circuit may control the motor drive circuit to adjust the rotational speed of the motor in response to an accelerometer to minimize the magnitude of the wobble of the ceiling fan. The control circuit may be configured to learn a preferred rotational speed for the motor. The control circuit may also be configured to control the rotational speed of the motor to affect a thermal comfort level of an occupant.

Abstract: A motor module includes: a motor; a driving unit; a control unit; a memory; and a communication unit. The control unit executes: receiving parameter information specialized for a vehicle-mounted device by the communication unit from a management module, and storing the parameter information in the memory; in a case where the parameter information is stored in the memory, driving the motor by the driving unit to operate the vehicle-mounted device so that the motor outputs a predetermined torque based on an operation signal input from an outside for operating the vehicle-mounted device and the parameter information; and in a case where the parameter information is not stored in the memory, driving the motor by the driving unit for a certain period of time and then stopping the motor to inch the vehicle-mounted device so that the motor outputs a maximum torque, based on the operation signal.

Abstract: An apparatus for controlling resonance suppression of a machine tool according to the present disclosure includes: a numerical control part; a main operation part; a PLC configured to execute a control command by means of communication with the numerical control part or the main operation part; a servo drive configured to execute the control command of the PLC; a servo motor part configured to operate under control of the servo drive; and a power conversion part electrically connected to the servo motor part and the servo drive and configured to apply electrical energy to the servo motor part, wherein the power conversion part controls resonance suppression in accordance with an operation of the servo motor part by adjusting electrical energy to be applied to the servo motor part based on a signal from the servo drive.

Abstract: A non-transitory, computer-readable medium may include instructions executable by at least one processor in a computing device to cause the processor to perform operations that include transmitting, to a first power source, a command to provide power to a coil of a switching device with a fixed current profile. The operations also include receiving one or more voltage measurements associated with the coil during a period of time, determining whether the voltage measurements associated with the coil indicate that one or more movable contacts of the switching device are at least partially welded to one or more contacts of an electric circuit, and transmitting an additional command to a second power source to disconnect a current to the coil in response to determining that the voltage measurements indicate that the movable contacts of the switching device are at least partially welded to the contacts of the electric circuit.

Abstract: Disclosed embodiments include electroadhesion devices for securing smartphones and other consumer devices to target surfaces. In various embodiments, the electroadhesion device may include a digital switch for adjusting the output voltage generated by a voltage converter. The digital switch may enable safe operation of the electroadhesion device by ensuring the output voltage generated by the voltage converter is compatible with the target surface. To determine a compatible output voltage, the electroadhesion device may include one or more sensors that may measure one or more characteristics of the target surface including conductivity, porosity, hardness, smoothness, and the like.

Abstract: Example systems and processes use three-phase vector mutual inductance analysis to detect zero-crossing (ZC) locations of back-electromotive force (BEMF) of an electric motor and to detect its commutation points during start-up or low-speed operation. For each sector of rotation of the rotor, two pairs of three-phase vectors are applied, along with current for the corresponding driving phase. The first pair is alternately applied to move the rotor, and the mutual inductances resulting from such application are compared to detect the zero-crossing (ZC) location in the BEMF of the electric motor in that sector. The second pair is then alternately applied within the same sector to continue to move the rotor, and the mutual inductances from such application are compared to detect the commutation point of the electric motor in that sector. The process may be repeated for each successive sector, changing the driving current at each new sector.

Abstract: A material handler comprises a motor, an interface device, and a controller. The controller is configured to receive an input from the interface device and can include a variable frequency drive (VFD). The controller provides a variable frequency drive (VFD) signal to the motor to control movement of one or more components of the material handler. If the interface device is inactive for a predetermined amount of time, the controller adjusts a frequency of the VFD signal from an operating frequency to a standby frequency with the standby frequency being lower than the operating frequency. Adjusting the frequency from the operating frequency to the standby frequency can include adjusting the frequency of the VFD signal to one or more intermediate frequencies. When adjusting the frequency of the VFD signal, the controller can skip at least one frequency or range of frequencies, for example, to avoid undesirable operating characteristics.

Abstract: An energy conversion apparatus, a motor, a power system, and a vehicle are provided. The energy conversion apparatus may integrate a motor drive function by using a three-phase bridge arm converter and a motor winding, and integrate an alternating current charging function by using a two-phase two-bridge-arm converter and a transformer. In this way, the energy conversion apparatus can integrate the charging function and the motor drive function. When the energy conversion apparatus is installed on an electric vehicle, a vehicle integration level can be increased, a structure layout of the electric vehicle can be simplified, and costs and a volume of the electric vehicle can be reduced.

Abstract: Method for controlling operation of an electrical machine, in particular of an electrical machine of a motor vehicle, an operating state of the electrical machine being switched between an active short circuit mode and at least one further operating mode. When switching between the short circuit mode and the at least one further operating mode, a duty factor of an operating signal, in particular of a PWM signal, of the electrical machine is changed in a ramp-shaped manner at least in sections.

Abstract: A motor control device according to the disclosure includes: a current control part, performing current control for rotating a motor from a stop state; a rotation speed calculation part, calculating an actual rotation speed of the motor; an acquisition part, acquiring a target rotation speed of the motor; a speed control part, performing speed control of the motor, so that the actual rotation speed of the motor becomes the target rotation speed; and a correction part, at a time when a current control state is transitioned to a speed control, correcting the target rotation speed based on a relation between the actual rotation speed and the target rotation speed. When the target rotation speed is corrected, the speed control part performs the speed control so that the actual rotation speed becomes the target rotation speed corrected by the correction part.

Abstract: A swivel assembly can have a longitudinal axis. The swivel assembly can have an upper portion and a lower portion that is rotationally coupled to the upper portion. The lower portion can have a connector configured to securely engage a cable. The lower portion can be configured to remain in electrical communication with the upper portion as the lower portion rotates with respect to the upper portion. A motor can be disposed between the upper portion and the lower portion and configured to selectively rotate the lower portion. A sensor can be configured to detect torsion in the cable. A controller can be in communication with the sensor and the motor. Upon receiving a signal from the sensor indicating a threshold torsion in the cable, the controller can be configured to cause the motor to rotate in a direction corresponding to a direction of the torsion in the cable.

Abstract: A control device for an electric vehicle, includes: a DC power supply; a three-phase AC motor; an inverter that converts DC power supplied from the DC power supply into AC power and outputs the AC power to the three-phase AC motor; and a control unit that controls the inverter to control an input voltage to the three-phase AC motor. Further, when a parameter correlated with the input voltage includes a predetermined high frequency component, the control unit performs correction of adding a component for canceling out the high frequency component to the input voltage, and controls the three-phase AC motor based on the corrected input voltage.

Abstract: The invention is systems and methods of operating a window with an automated window mechanism. The systems and methods include moving with the automated window mechanism a sliding panel of a window relative to a window frame to open or close the window. The sliding panel moves through a proximate closing zone. The method also includes in the proximate closing zone, operating the automated window mechanism in a limited state comprising at least one of reduced velocity, reduced current to the automated window mechanism, or reduced voltage to the automated window mechanism.

Abstract: A control system for an electrical motor comprises a rotor, a stator having a plurality of phase windings, and an inverter for applying voltage to the plurality of phase windings by connecting individual phase windings to a first or second voltage level. The control system is configured to measure a first rate of change of current in a first phase winding, of said plurality of phase windings, connected to the first voltage level, to measure a second rate of change of current in a second, different phase winding connected to the first voltage level, and to calculate a difference between the first and second rate of change of current. The control system is further configured to use the calculated difference to obtain data related to a position of the rotor.

Abstract: A motor driving apparatus includes: an inverter that includes at least one switching element and that is configured to output alternating current power to a motor, a vibration sensor configured to detect vibrations, and a controller (i) comprising a compensation signal generator that is configured to, based on an output value of the vibration sensor, generate a compensation signal and (ii) configured to generate a control signal for controlling the inverter.

Abstract: Disclosed is a motor control apparatus capable of checking whether there is an abnormality in connections of a plurality of motors, and switching connection schemes between an inverter and the motors or driving the motor in an electronic apparatus including one inverter configured to control a driving operation of the plurality of motors. For example, the motor control apparatus includes an inverter configured to convert DC power into AC power and provide the AC power to one of a plurality of motors, a switch configured to switch connection schemes between the inverter and the plurality of motors, and a controller, and the controller may control the inverter to output an input signal of a predetermined pattern in response to the switching of the connection schemes by the switch, and generate a control signal for controlling the inverter or the switch on the basis of a response signal corresponding to the input signal. Other example embodiments may be provided.