Abstract: A motor control system determines an operating point for controlling an electric motor in an electric system that includes a battery and an electronic control unit. The motor control system includes a calibrator having an input for receiving a battery voltage of the battery, a motor speed, and a requested torque of the electric motor. The calibrator calculates a modified speed based on the received battery voltage, motor speed and requested torque. An operating point controller has an input for receiving a fixed battery voltage reference, the modified speed and the requested torque. The operating point controller determines the operating point for controlling the electric motor based on the received fixed battery voltage reference, the modified speed, and the requested torque.

Abstract: The invention provides a screw air compressor unit with energy storage, which mainly includes a power battery module, a frequency converter, a permanent magnet synchronous motor, and a screw air compressor respectively arranged therein. The frequency converter is connected to the power battery module and converts the electrical energy thereof into the voltage and frequency required by the permanent magnet synchronous motor. When the permanent magnet synchronous motor obtains electrical energy, and can correspondingly drive the screw air compressor to operate and store air. As mentioned above, by changing the power supply source, the power battery module is used to supply the power of the permanent magnet synchronous motor and the energy storage of the linked air compressor, which effectively achieves the functions and advantages of energy saving, noise reduction and equipment size.

Abstract: Disclosed are a motor control device capable of stably driving an AC motor even under influence of dead time, and an electric vehicle mounted with an AC motor controlled by the motor control device. The motor control device controls a power converter (2) to which an AC motor (2) is connected. The motor control device includes: a voltage vector calculation unit (18) that generates a voltage command of the power converter such that an AC amount of the AC motor matches a command value; and a damping ratio control unit (26) that calculates, on the basis of a vibration component of a dq-axis component of the AC amount, the vibration component of a d-axis component or the vibration component of a q-axis component at a time point when a phase of the AC amount advances, and generates a correction amount for correcting the voltage command on the basis of the calculated vibration component of the d-axis component or the calculated vibration component of the q-axis component.

Abstract: Devices, systems, and methods for positioning an end effector or remote center of a manipulator arm by floating a first set of joints within a null-perpendicular joint velocity sub-space and providing a desired state or movement of a proximal portion of a manipulator arm concurrent with end effector positioning by driving a second set of joints within a null-space orthogonal to the null-perpendicular space. Methods include floating a first set of joints within a null-perpendicular space to allow manual positioning of one or both of a remote center or end effector position within a work space and driving a second set of joints according to an auxiliary movement calculated within a null-space according to a desired state or movement of the manipulator arm during the floating of the joints. Various configurations for devices and systems utilizing such methods are provided herein.

Abstract: Systems and methods for an externally excited electric machine. The method for operation of the externally excited electric machine, in one example, includes operating the externally excited electric machine above a threshold speed in a first stator winding configuration of a stator and switching the stator from the first winding configuration to a second winding configuration while the externally excited electric machine is maintained above the threshold speed. In the system, the externally excited electric machine includes multiple rotor windings which are configured to be externally excited.

Abstract: A method for controlling a three-phase electric machine by a control unit operatively connected to a controller, to a sensor, and to an inverter includes: a first acquisition phase, wherein the control unit receives, from the controller, a first signal representative of a reference torque; a second acquisition phase, wherein the control unit receives, from the sensor, at least one further signal representative or one or more of the following quantities: an electric quantity of the inverter, an electric quantity of the three-phase electric machine, and a mechanical quantity of the three-phase electric machine; a control phase, wherein the control unit generates a control signal that it inputted to the inverter for generating an effective torque of the three-phase electric machine, wherein the control signal is determined on the basis of a reference stator voltage, wherein the reference stator voltage is determined by the control unit as a function of a reference amplitude value and a reference load angle value

Abstract: A voltage control device that controls an output voltage by turning on/off a switching element by a control pulse, the voltage control device including a modulation wave generation unit that generates a sinusoidal wave based on a driving voltage and a driving frequency as a modulation wave, an arithmetic unit that calculates, at any discrete time point [t], a moving average value of a voltage [v] output every time duration [?] smaller than a time cycle of the modulation wave in a time period [t?N? to t??] tracing back N (a positive integer) steps from the discrete time point [t] in accordance with Expression (1) below, and a control pulse generation unit that generates the control pulse in accordance with a result of a comparison between the moving average value and an instantaneous value of the modulation wave at the discrete time point [t].

Abstract: A method of parameter estimation for a PMSM (permanent magnet synchronous motor) includes: iteratively revising an estimate of an inductance parameter of the PMSM, until the estimate either converges to a predetermined accuracy level or diverges; and controlling a magnitude of phase currents injected into the PMSM during each iteration of revising the estimate of the inductance parameter. Additional methods of PMSM parameter estimation are described, including rotor flux linkage estimation.

Abstract: An aviation sidestick is a device that can be used to control various manned and unmanned equipment, including flying, ground, underwater, to control spacecraft in outer space and to control computer games. It consists of a housing, a handle with buttons and a scroll wheel, a bracket/arm, a compensating mechanism, a fixed base in the form of a spherical segment and a mechanism that simulates feedback located under the compensating mechanism, while the geometric centers of the sphere and the focus of the sphere segment do not coincide, but is positioned on the same axis.

Abstract: A motor control system includes a first STO circuit, a second STO circuit and a pulse control module. The first STO circuit includes a first filter circuit, a first STO switch, a first photocoupler circuit and a second photocoupler circuit. The first and second photocoupler circuits are connected in series. The first STO switch and the first filter circuit are connected with the first photocoupler circuit. The second STO circuit includes a second filter circuit, a second STO switch, a third photocoupler circuit and a fourth photocoupler circuit. The third and fourth photocoupler circuits are connected in series. The second STO switch and the second filter circuit are connected with the third photocoupler circuit. The pulse control module issues a pulse signal to the second and the fourth photocoupler circuits and detects whether the first or the second STO circuit is abnormal.

Abstract: Opening and closing mechanism which has a power supply (1), a rotation direction setter (2), a control unit (3), which is connected to the rotation direction setter (2), a valve actuator motor (5), which is connected to the control unit in which one of the connections is for sending a BREAK instruction from the control unit (3) to the motor (5), a signal which is sent when a shutdown occurs due to over-torque inferred from the motor rotation speed. This opening and closing mechanism is not limited by any wear of the plug, has no need to use measurement of the current drawn and establishes the torque level based on measurement of the motor rotation speed, the rotation speed corresponding to the nominal torque having been previously established.

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.