Abstract: When a difference between a first wave height value of a current flowing through a first direct-current power supply and a second wave height value of a current flowing through a second direct-current power supply is greater than or equal to a determination threshold value and the first wave height value is larger than the second wave height value, a control part in a rotating electrical machine control system determines that a first smoothing capacitor has an open-circuit failure, and when a difference between the first wave height value and the second wave height value is greater than or equal to the determination threshold value and the second wave height value is larger than the first wave height value, the control part determines that a second smoothing capacitor has an open-circuit failure.

Abstract: A switch controller coupled to control a transistor. The switch controller comprising an interface coupled to receive a command signal in response to an event sensed in a control system. The command signal is representative of a first command to control the transistor with a first drive strength or a second command to control the transistor with a second drive strength. The switch controller is coupled to adjust a fall time or a rise time, or to adjust both the fall time and the rise time, of a voltage across the transistor in response to the command signal. The fall time or the rise time, or both the fall time and the rise time in response to the second command is shorter than the fall time or the rise time, or both the fall time and the rise time in response to the first command.

Abstract: An electric valve/door, and a control apparatus and method thereof are provided. The electric valve/door includes a control apparatus. The control apparatus includes an alternating current (AC) asynchronous motor, a transmission device, and a valve driver. The valve driver is connected to the AC asynchronous motor. The AC asynchronous motor is connected to the valve/door through the transmission device. The valve driver is configured to collect information of a real-time torque of the AC asynchronous motor or the valve/door during operation, and take a set torque of the valve driver as an input and the real-time torque as a feedback to immediately correct an output torque of the valve driver or a limit value of the output torque by using a proportional-integral-derivative (PID) control algorithm, to meet requirements for response speed and control precision of each stage in opening and closing processes of the valve/door.

Abstract: A method for controlling a movement of a hood or of an outer body panel of a motor vehicle, includes the steps of acquiring a first input signal relating to a first quantity indicative of a current position of the hood or of the outer body panel, determining a first reference signal corresponding to a target speed for the movement of the hood or of the outer body panel, determining a first control signal as a function of the determined first reference signal, updating the first control signal as a function of the acquired first input signal, thereby obtaining a second control signal for controlling the actuator device, and controlling the actuator device with the second control signal.

Abstract: A motor drive system includes a battery, double-stator axial gap motors, inverter circuits configured to control power running drive and regenerative drive of the double-stator axial gap motors, step-up/step-down circuits configured to adjust at least voltage of regeneratively generated power of the double-stator axial gap motors, and one or more control devices configured to control drive of the inverter circuits and the step-up/step-down circuits. Each of the double-stator axial gap motors includes two stators. Each of the inverter circuits are connected to a respective one of the two stators. The inverter circuits are connected in series. A single step-up/step-down circuit among the step-up/step-down circuit is provided for each of the axial gap motors. The single step-up/step-down circuit provided for each of the axial gap motors is connected to one of two inverter circuits connected to the two stators among the inverter circuits.

Abstract: A surgical stapling system includes a motor, a gear reducer assembly, a drive train, and a motor controller. A method of controlling the motor includes applying a first signal to the motor, receiving drive train operational data, comparing the drive train data to baseline data, and applying a signal having a different shape than the first signal to the motor. A method of characterizing the motor includes transmitting a perturbation signal, receiving motor function parameters, determining stapler system characteristics, and adjusting a controller function. A method of controlling a stepper motor includes applying a signal to the stepper motor, receiving stepper motor operational data, comparing the data to baseline data, and adjusting the signal. Another method of controlling the motor includes receiving motor rotational data, receiving gear rotation data, calculating a mechanical transfer function, determining non-idealities of the stapling system, and modifying a control signal based on the non-idealities.

Abstract: Method of operating a lid of a robotic vehicle. The lid is operable by a motor between an opened and a closed positions. When the lid is between the opened position and a first intermediary position, a first electric current having a first value is provided to the motor for exerting a first force on the lid. When the lid is between the first intermediary position and a second intermediary position, a second electric current, having a second value whose sign is opposite to a sign of the first value, is provided to the motor for exerting a second force on the lid. The second force is applied in an opposite direction of the first force. When the lid is between the second intermediary position and the closed position, a third electric current having a third value having a same sign than the first value is provided to the motor.

Abstract: A control part determines that a contactor is in an open state, based on a voltage at both ends of a smoothing capacitor and a current flowing through a direct-current power supply. In a state in which rotational speed is greater than or equal to a speed threshold value, the control part controls both inverters by shutdown control and brings both contactors into an open state. After the rotational speed reaches less than the speed threshold value, the control part controls a failure-side inverter by active short-circuit control, and drives a normal-side inverter using discharge torque of a smoothing capacitor. After eliminating an abnormal voltage state, the control part controls a normal contactor to a closed state and drives a rotating electrical machine by one of the inverters.

Abstract: A method includes operating an electric implement to move or cut material in an outdoor environment, wherein operating the electric implement creates acoustic sound and managing the acoustic sound by selecting an operating frequency for the electric implement and controlling an electric motor of the electric implement in accordance with the operating frequency.

Abstract: A method for operating an electrical circuit arrangement comprising at least one first component and one second component, wherein the components are electrically connected across a direct current sub-grid of the electrical circuit arrangement, includes switching the first component at a first operating point with a first cycle time and switching the second component at a second operating point with a second cycle time, wherein the components are connected across a communication link and a phase position is determined and set between the first cycle time and the second cycle time as a function of fault information describing at least one present alternating voltage in the direct current sub-grid.

Abstract: A motor control method according to an embodiment of a present invention comprises the steps of: performing three-phase commutation in a first range section of a motor rotational speed in a brake mode of a motor; performing two-phase commutation in a second range section of the motor rotational speed performing one-phase commutation in a first range section of the motor rotational speed; and turning off commutation when the motor rotational speed is less than or equal to the first range section.

Abstract: A power tool device, in particular a screwing and/or drilling device, including a drive unit for a rotational driving of a tool, in particular a drill or a screwdriver blade. The power tool device is adapted to detect at least one drive variable (AG) during the rotational driving of the tool, in which the drive variable (AG) is the torque acting on the tool and/or a drive variable associated with this torque, for example an electrical drive variable of the drive unit. The power tool device is adapted to determine a change criterion during the rotational driving of the tool on the basis of the at least one detected drive variable (AG) and to change the rotational driving of the tool in response to the detected drive variable (AG) satisfying the change criterion.

Abstract: A vehicle includes an electric machine including a rotor. The vehicle further includes a traction battery configured to supply electric power to the electric machine. The vehicle further includes a wheel mechanically coupled to the electric machine. The vehicle further includes one or more controllers programmed to, responsive to detecting a battery temperature below a threshold and the vehicle being parked, rotate the rotor to a preset position such that the wheel rotates.

Abstract: A first offset correction and a second offset correction are switched between in a cycle Tc shorter than an electrical angle cycle of an alternating current rotating machine, the first offset correction is such that a first shift amount is fixed in such a way as to obtain an applied voltage such that at least n?2 phases among phase currents of the alternating current rotating machine can be detected, and the applied voltage is calculated by the first shift amount being subtracted equally from all voltage commands, and the second offset correction is such that a second shift amount is fixed in such a way that a sign of an average value in an electrical angle cycle is reversed with respect to that of an average value in an electrical angle cycle of the first shift amount, and the applied voltage is calculated by the second shift amount being subtracted equally from all the voltage commands.

Abstract: An electric drive system for a vehicle includes an inverter having at least one phase leg, wherein a first of the phase legs includes a first power switch; an internal voltage supply configured to generate an internal supply voltage regulated with respect to a voltage on a rail and a second voltage, wherein the internal voltage supply is configured to reduce a voltage difference between the internal supply voltage and the second voltage in response to a signal indicating a shut-down or a fault; and a gate drive channel configured to drive the first power switch into conductance by applying the voltage difference between the internal supply voltage and the second voltage between a control terminal and a main terminal of the power switch, gate drive channel configured to continue the driving of the first power switch for a time duration after the signal indicating the shut-down or the fault.

Abstract: A power converter includes a power conversion unit for a three-phase alternating current output from an alternating-current power source, and a current compensation unit that supplies a compensating current to the alternating-current power source. The current compensation unit includes a current compensation unit inverter including switching elements, a current compensation unit capacitor, a current compensation unit reactor, a compensation controller that obtains an output voltage command value, and a drive signal generator that generates a drive signal usable to drive the switching elements by a three-phase modulation method. The current compensation unit inverter supplies the compensating current to the alternating-current power source via the current compensation unit reactor. Td?(34.00/fsw?0.145)(1.55?0.

Abstract: A method of controlling a brushless permanent-magnet motor having a phase winding and a rotor, includes applying voltages of first and second opposing polarities to the phase winding when the rotor is oscillating about a parking position, measuring a plurality of first times, each first time including a time taken for current flowing through the phase winding in response to an applied voltage of the first polarity to exceed a threshold and measuring a plurality of second times, each second time including a time taken for current flowing through the phase winding in response to an applied voltage of the second polarity to exceed the threshold. The method includes determining which of an average magnitude of the plurality of first times and an average magnitude of the plurality of second times has the smaller average magnitude, and determining an amplitude peak of the plurality of times having the smaller average magnitude.

Abstract: A motor driver circuit includes: an error detection amplifier configured to receive a current feedback signal indicating a drive current of a motor as an object to be driven and an analog command signal indicating a target amount of the drive current, and generate an analog error signal indicating an error between the drive current and the target amount of the drive current; an A/D converter configured to convert the analog error signal generated by the error detection amplifier into a digital error signal; a digital compensator configured to generate a digital control amount based on the digital error signal output by the A/D converter; a D/A converter configured to convert the digital control amount into an analog control signal; and an output stage configured to supply a drive signal according to the analog control signal to the motor.

Abstract: Electric motors having variable poles are disclosed herein. In one aspect, an electric motor includes a stator including a plurality of magnetic conductive wires. The magnetic conductive wires are configured to form a plurality of poles. The electric motor further includes a rotor configured to rotate in response to a magnetic field generated by the poles of the stator and an electronic control module electrically coupled to the magnetic conductive wires. The electronic control module is configured to adjust a configuration of the poles of the stator.

Abstract: Aircraft having at least one propulsion unit supplied with hydrogen by at least one hydrogen tank, and having at least one thrust reversal system including at least one actuator. The aircraft can include at least one means for storing or transporting the residual hydrogen of the propulsion unit, a fuel cell disposed in the hydrogen power source and supplied with hydrogen by the at least one means for storing the residual hydrogen, and a hydrogen thrust reverser actuation system. The thrust reverser actuation system can include a hydrogen thrust reverser actuation controller and a hydrogen primary power unit with a fuel cell supplied with hydrogen and powering the at least one thrust reverser actuator.