Abstract: A surgical robotic system includes a control tower and a mobile cart. The control tower is configured to selectively output power and includes a frequency generator and a converter. The frequency generator is configured to generate an electrical frequency signal and the converter is configured to receive the electrical frequency signal and convert the electrical frequency signal to a first optical signal having a unique identifier frequency. The mobile cart is configured to receive the first optical signal from the control tower and includes an optical splice configured to loop the first optical signal back to the control tower as a second optical signal and deliver the first optical signal to a frequency monitor of the mobile cart.

Abstract: A method of reducing mechanical vibrations of a motor system including an electric motor, the method including: a) receiving a vibration-related signal based on measurements by one or more sensors mounted on the electric motor, b) generating a reactive torque reference based on the vibration-related signal, and c) controlling the electric motor based on the reactive torque reference and a main torque reference to counteract the mechanical vibrations.

Abstract: A servo control method for a multi-joint hydraulic manipulator based on adaptive sliding mode is provided. A motion trajectory of an end of the multi-joint hydraulic manipulator in a workspace is generated, and expected angular displacement, angular velocity and angular acceleration of individual joints are calculated. An actual angular displacement and an actual angular velocity of the individual joints under a current position-pose are calculated. Combined with a dynamic model of the manipulator, a driving force of individual joints is calculated. Based on the expected angular displacement, the actual angular displacement and the driving force, a sliding-mode surface is constructed. The adaptive law is updated to perform adaptive sliding-mode control for the manipulator. A system for implementing the servo control method is also provided.

Abstract: A power supply circuit in an inverter for driving an electrical machine includes a high-voltage branch with a high-voltage level, a low-voltage branch with a low-voltage level and a discharge branch with a discharge voltage level, wherein the high-voltage level is higher than the low-voltage level and the discharge voltage level. The high-voltage branch can be connected to the low-voltage branch via an operating DC/DC converter, and to the discharge branch via a discharge DC/DC converter. The discharge branch is different from the low-voltage branch. A low-voltage energy storage device is connected in the discharge branch. A method for using the power supply circuit includes, in a first operating mode, conducting current from the high-voltage branch via the operating DC/DC converter into the low-voltage branch, and in a second operating mode, conducting current from the high-voltage branch via the discharge DC/DC converter into the discharging branch.

Abstract: A power electronic circuit includes a topological switch having at least two power semiconductors connected in parallel, a driver configured to drive the power semiconductors, a gate resistor between the driver and the power semiconductors, a monitoring device to detect a voltage drop between two load terminals of the topological switch and output it as a signal, and a comparison device arranged between the driver and the gate resistor and configured to compare the signal output from the monitoring device with a current signal output from the driver, wherein, in the event that the detected difference exceeds a predetermined threshold value and a signal is additionally output by the driver instructing that the power semiconductors should not be conductive, the monitoring device outputs an emergency signal to the driver, which is configured to then output a signal to the power semiconductors to put them into a safety state.

Abstract: A servo unit includes a main controller, inverter units configured to control different motors in accordance with a command from the main controller, and a power unit that is configured to supply direct current power to each of the inverter units and that is communicable with the inverter units in parallel. The inverter units include a single key inverter unit. The main controller and the power unit communicate with each other via the key inverter unit that is a relay. The power unit controls power supply based on a power source control command transmitted from the main controller.

Abstract: Provided an electronic device including a main body and a kit connected to the main body, and the main body includes a battery, a first motor, an electric wire connected to the battery, and a first controller connected to the electric wire, the kit includes a second motor supplied with power through the electric wire, an inverter connected to the second motor, and a second controller connected to the electric wire and configured to control driving of the inverter, and the second controller is configured to transmit information to the first controller through switching frequency control of the inverter and control a switching frequency of the inverter so that a current associated with the second motor is greater than zero in a section in which transmission of the information is performed.

Abstract: In a method for optimizing an operation of a dynamoelectric machine correction data for the dynamoelectric machine is requested by a client from a server. An identification number is transmitted by the client to the server, in particular via the Internet, and the correction data is transmitted by the server to the client. The dynamoelectric machine is operated based on the obtained correction data.

Abstract: A cleaning system including a motor configured to provide rotational energy, a current sensor configured to sense current provided to the motor, and a controller having an electronic processor. The controller is configured to receive, from the current sensor, a current signal indicative of the current provided to the motor, filter the current signal to produce a filtered current signal, and control the motor based on the filtered current signal.

Abstract: A stator defines multiple stator poles with associated electrical windings. A rotor includes multiple rotor poles. The rotor is movable with respect to the stator and defines, together with the stator, a nominal gap between the stator poles and the rotor poles. The rotor poles includes a magnetically permeable pole material. The rotor also includes a series of frequency programmable flux channels (FPFCs). Each FPFC includes a conductive loop surrounding an associated rotor pole. The stator and the rotor are arranged such that the electrical windings in the stator induce an excitement current within at least one of the FPFCs during start-up.

Abstract: An example apparatus includes: current driver circuitry configured to supply power to a stepper motor; and controller circuitry coupled to the current driver circuitry, the controller circuitry configured to: determine a first duty cycle of power transferred to the stepper motor by the current driver circuitry during a first operation of the stepper motor, the first operation to supply power using currents of a target magnitude; determine an previous duty cycle of power transferred to the stepper motor by the current driver circuitry during a second operation of the stepper motor, the second operation of the stepper motor to supply power using currents of the target magnitude; and determine changes in a mechanical load applied to the stepper motor responsive to a comparison of the first duty cycle to the previous duty cycle.

Abstract: For example, the switching drive device 100 includes a driver 30 configured to drive an N-type semiconductor switch element, a current limiter 50 configured to limit a current fed to a boot capacitor BC1 included in a bootstrap circuit BTC, and a current controller 60 configured to control the operation of the current limiter 50. The current controller 60 is configured to drive the current limiter 50 to limit the current fed to the boot capacitor BC1 when the charge voltage across the boot capacitor BC1 is higher than a threshold value.

Abstract: A power storage system has a battery, a three-phase motor in which coils of three phases are connected at a neutral point, an inverter connected on an electric power transmission path between the battery and the three-phase motor, and a DC power supply circuit connected to a connection portion positioned on an electric power transmission path between the inverter and the battery. The battery includes two power storages and a switch unit that switches between a first voltage state where the two power storages are connected in series and chargeable at a first voltage, and a second voltage state where the two power storages are connected in parallel and chargeable at a second voltage. The DC power supply circuit has a branch circuit connected to a coil of any one phase among the coils of three phases at a positive electrode side of the DC power supply circuit.

Abstract: A sliding-door drive unit for a vehicle is capable of transferring or blocking drive power required to pull or push a cable to open or close a sliding door. The sliding-door drive unit includes a worm wheel rotatable by a drive motor, a stationary disc coupled to an output shaft, and a movable disc rotatably installed between the worm wheel and the stationary disc along an axial direction of the output shaft. The movable disc is engaged with the worm wheel and is selectively engaged with the stationary disc.

Abstract: A synchronous-motor control device includes a torque-command-value conversion unit for converting a torque command value for a synchronous motor into a second-torque command value which gradually increases in a region including a peak of a torque of the synchronous motor, a voltage-phase control unit for controlling a voltage phase angle such that the torque of the synchronous motor matches the second-torque command value, and a power conversion unit for converting DC power into AC power based on the voltage phase angle and a rotational angle of the synchronous motor, and for outputting the AC power resulted from the conversion to the synchronous motor.

Abstract: A first circuit has a predetermined function with an output that has a small dependence on a certain operation condition. A second circuit has the same function as that of the first circuit with an output that has a large dependence on the certain operation condition. When the first circuit is operating normally, the main circuit operates according to the output of the first circuit. The main circuit is capable of generating a detection signal that indicates the certain operation condition based on a relative relation between the output of the first circuit and the output of the second circuit.

Abstract: A hand-held electrically powered cut-off tool (100) for cutting concrete and stone by a rotatable cutting disc (105), the cut-off tool (100) comprising an electric motor (130) arranged to be controlled by a control unit (110) via a motor control interface (120), wherein the control unit (110) is arranged to obtain data indicative of an angular velocity of the cutting disc (105), and to detect a kickback condition based on a decrease in angular velocity, wherein the control unit (110) is arranged to determine an angular acceleration associated with the electric motor (130), and to detect the kickback condition based on a comparison between the determined angular acceleration and a detection threshold, wherein the detection threshold is configured at an angular acceleration between 5000 rad/s2 and 35000 rad/s2, and preferably between 10000 rad/s2 and 30000 rad/s2, and more preferably between 20000 rad/s2 and 30000 rad/s2.

Abstract: Methods, systems, and devices for electric machine torque adjustment based on waveform multiples are disclosed herein. One electric machine controller, arranged to direct pulsed operation of an electric machine, utilizes a pulse controller that calculates a first average measured torque from sensed torque values over a first time period and a second average measured torque from sensed torque values over a second time period, wherein the first and second time periods are different time periods.

Abstract: A motor rotational speed control system and method having a duty cycle variable modulation mechanism is provided. The motor rotational speed control system is performed by the motor rotational speed control system including a motor rotational speed detector and a motor driver. When a rotational speed of a motor detected by the motor rotational speed detector is larger than or equal to a set rotational speed, the motor driver modulates duty cycles of a plurality of waveforms of an on-time signal, and modulates a duty cycle difference between the duty cycle of each of the plurality of waveforms and the duty cycle of a previous one or every other one of the plurality of waveforms in the on-time signal. The motor driver, according to the on-time signal, drives the motor such that the rotational speed of the motor is limited to be smaller than the set rotational speed.

Abstract: A vibratory actuator includes a vibration body, a contact body, a base, a holding member, and a flexible substrate. The vibration body includes an elastic body and an electro-mechanical energy conversion element. The contact body is in contact with the elastic body and relatively moves with the vibration body due to vibration of the vibration body. One end of the flexible substrate is arranged along a first surface of the holding member and is folded back with respect to an end portion of the holding member toward a second surface of the holding member on a back side of the first surface, and an other end of the flexible substrate is supported by a portion of the base. The flexible substrate separates from the second surface to form a U-turn portion so that the one end and the other end of the flexible substrate are electrically connected.