Abstract: In an example, a control system for controlling a generator and providing an alarm upon detection of a fault condition. The control system includes a control relay, which includes a normally-open (NO) contact pair and a normally-closed (NC) contact pair, between the transfer switch and a controller. The NO contact pair is provided by a NO contact and a common contact, and the NC contact pair is provided by a NC contact and the common contact. The controller can receive signals indicative of a state of the contact pairs of the control relay and, based on the signals, determine whether to activate the generator and/or activate an alarm system.

Abstract: A control arrangement for an entrance system has one or more movable door members and an automatic door operator for causing movements of the one or more movable door members between closed and open positions. The door members comprise one or more swing doors. The control arrangement comprises a controller and a plurality of sensors. Each sensor is connected to the controller and is configured to monitor a respective zone at the entrance system for presence or activity of a person or object. Each sensor has an active mode and an inactive mode, wherein the sensor consumes no electric power in the inactive mode or substantially less electric power in the inactive mode than in the active mode. The controller is configured to determine a current operational state of the entrance system among a plurality of possible operational states, and selectively cause at least one of the sensors to be in its active mode or in its inactive mode depending on the determined current operational state of the entrance system.

Abstract: Provided is a magnetic pole position detection device with which it is possible to shorten the detection time of the initial magnetic pole position of the rotor of a synchronous motor.

Abstract: A method of catching a residual energy stored in an electric coil of a self-inducted back-EMF from an armature of a PMBLDC motor while the motor running driven by a PWM signal is disconnected from a power source and accumulating the residual energy in a storage, and sending a portion of the energy in the storage to a rechargeable power source in order to extend the rechargeable power source's run-time and achieve higher energy efficiency.

Abstract: A steer-by-wire system comprising a steering wheel for use by an operator and an electric motor assembly coupled to the steering wheel for providing active torque feedback. The electric motor has a rotor mounted for rotation, and a magnet mounted to the rotor for rotation about an axis, wherein the at least one magnet is a permanent magnet with a pole pair. A fixed stator has coils for creating an electric field to act upon the magnet. Electronics are positioned on the axis of the magnet for controlling commutation of the stator coils and generating a primary high resolution angular position signal indicative of movement of the steering wheel by the operator. High resolution on-axis sensors, in communication with the electronics, detect a commutation position between the rotor and the stator and producing first and second continuous angle measurements for the pole pair of the at least one magnet.

Abstract: A digital signal processor includes K first electronic circuits. The first inputs receive K groups of G successive coefficients of a polynomial. The polynomial are of degree N with N+1 coefficients, where K is a sub-multiple of N+1 greater than or equal to two and G is equal to (N+1)/K. The first electronic circuits are configured to simultaneously implement K respective Horner methods and deliver K output results. A second electronic circuit includes a first input configured to successively receive the output results of the first electronic circuits starting with the output result of the first electronic circuit having processed the highest rank coefficient of the coefficients. A second input is configured to receive a variable X and the second electronic circuit is configured to implement a Horner method and deliver a value of the polynomial for the variable X on the output of the second electronic circuit.

Abstract: A garage door status monitoring and control system includes a motor operable to move a garage door to alternate garage door positions, an encoder associated with the motor and configured to generate a pulse stream comprising motor signal pulses indicative of movement of the motor, a door control module with a first microprocessor operatively coupled to the encoder via a first path and configured to receive the pulse stream, and a garage door operator having a door controller with a second microprocessor operatively coupled to the encoder via a second path and configured to receive the pulse stream from the encoder independent of the door control module. The first microprocessor is configured to generate a digital door status indicative of one of the alternate garage door positions in response to the pulse stream. The garage door operator provides supervisory control over movement of the motor based upon the pulse stream.

Abstract: Systems and methods for estimating input current are provided, particularly when input currents are applied to an electric motor of a motor system. An Electric Control Unit (ECU), according to one implementation, is configured to control the motor system. The ECU is configured to store computer logic having instructions that, when executed, cause one or more processing devices to obtain a duty cycle parameter at an output of the ECU. The duty cycle parameter, for example, relates to control actions enforced on one or more switches of a power electronics circuit of the motor system. Based on the duty cycle parameter, the instructions further cause the one or more processing devices to estimate an input current provided to the electric motor of the motor system. A more accurate input current estimation may thereby be used to better estimate torque.

Abstract: Method for using a robot system carrying out a job at a workstation of a container processing facility, wherein the robot system moves with a chassis supported on the floor in a working area of the container processing facility, characterized in that the robot system automatically removes work material and/or consumable material needed for the job, such as, for example, a cleaning agent or a lubricant, at a supply area and transports it to the workstation for the job.

Abstract: A motor controller to control rotational speed of an output shaft of an electric motor. The motor controller includes a proportional controller and a time-optimal controller. The proportional controller controls the rotational speed when a present rotational position of the shaft is between a target rotational position and a switching point, inclusively. The time-optimal controller controls the rotational speed when the present rotational position is not between the target rotational position and the switching point. Also introduced herein are aspects pertaining to determining the switching point in a manner that minimizes overshooting the target rotational position while maximizing expediency at which the target rotational position is reached.

Abstract: A dual battery power management system, its battery controller and method for controlling the same have been provided. The dual battery power management system includes a load module, a battery controller, a first battery and a second battery. The battery controller is electrically connected to the load module for receiving an electrical requirement demanded by the load module. The battery controller is provided with a DC-DC converter and a serial-parallel switch. The first battery is employed to provide a first input voltage which is converted to a converted DC voltage by the DC-DC converter. The second battery is electrically connected to the serial-parallel switch and is used to provide a second input voltage. Upon the aforementioned electrical requirement, the battery controller controls the series-parallel switch to be operated at a serial mode or a parallel mode.

Abstract: The present invention relates to a relay protective device, a construction machine, a relay protection control method and apparatus, and a computer readable storage medium.

Abstract: An unmanned vehicle is provided that includes a housing configured to rotate about a rotational axis. The housing supports a pendulum drive assembly having coaxial first and second drive axles that are coaxially aligned with the rotational axis. A first rotating member is mechanically coupled to the first drive axle and configured to rotate with the first drive axle. A second rotating member is mechanically coupled to the second drive axle and configured to rotate with the second drive axle. The pendulum drive assembly includes a first electrical motor and corresponding first transmission system that are operably coupled to the first drive axle as well as a second electrical motor and corresponding second transmission system that are operably coupled to the second drive axle.

Abstract: The present invention relates to a method of commutation control of a brushless DC (BLDC) motor. The method uses a controller to control the BLDC motor using a modified six-step commutation. The method adds six intermediate steps that overlap the six-step commutation. Each of the six steps overlap with preceding and following steps, resulting in six additional intermediate steps in which all three phases are active. By doubling the number of steps, current and torque will vary less over time compared with current solutions without increasing the size or changing the design of the motor.

Abstract: The control device in a linear motor system calculates a current command value for the stator based on a first speed integrated value obtained by integrating a speed deviation between a speed command for the mover and an actual speed of the mover, and performs first digital filter computation on the current command value. The control device calculates a current command value for the stator based on a second speed integrated value obtained by integrating a speed deviation between a speed command for the mover and the mover's actual speed, and performs second digital filter computation on the current command value. The current command calculating unit calculates a second speed integrated value based on the first speed integrated value used by the control device, and performs the second digital filter computation using a value of the first digital filter computation of the control device.

Abstract: In a power conversion system, a power converter includes a power conversion circuit connected to a direct current (DC) source via a DC distribution line and converts and supplies received DC power to a load, and a power conversion control unit. A power stabilizing device is disposed between the DC distribution line and the power converter and stabilizes a DC voltage applied from the DC power source. A control power source of the power stabilizing device performs current control of the current transformer to suppress DC magnetization caused by a DC current component of the primary current while compensating for a varying component of the DC voltage. The control power source acquires current information or voltage information calculated from control information used by the power conversion control unit for control operations related to energization of the load and uses it as control information for the power stabilizing device.

Abstract: The present invention relates broadly to commutation control of a BLDC motor for use with, for example, a power tool. The method uses a controller to control a BLDC motor in the event of a position sensor failure. Rather than ceasing operation of the motor and indicating a fault or error message to the user, the present invention determines when the next transition should occur based on the time between past hall transitions using a timer. Thus, if one or two position sensors are no longer providing position information to the controller, the controller can determine when the transitions would be changing based on past transitions to continue controlling the motor and prevents the motor from ceasing operation.

Abstract: Circuitry for directly providing drive power to a BLDC motor having separated coils, comprising unipolar controlled current sources for supplying current to each of the separated coils; a controller, for controlling the level and phase of the unipolar controlled current sources; a polarity switch for converting the unipolar current to a bipolar (AC) current, supplied to the separated coils. The controller is adapted to shape the current being fed to the BLDC motor by the current source via the polarity switch, to be in phase with the back EMF sensed on the separated coils, and of a magnitude that corresponds to a required torque.

Abstract: A field of electric drive devices and electric machines, such as electric motors and electric generators for industrial applications and more particularly to a method and an arrangement for controlling vibration of a variable frequency drive controlled electric machine. In the method for controlling vibration of a variable frequency drive controlled electric machine, the resonance frequency/frequencies and the stiffness are determined in a ramp up/ramp down test; amount of damping is determined in an impulse test; a mechanical transfer function is determined in a steady drive test; a vibration control model is determined utilizing said resonance frequency/frequencies, said stiffness, the amount of damping and the mechanical transfer function; and vibration is controlled utilizing the vibration control model.

Abstract: The present disclosure provides a method for reducing the electromagnetic vibration of a fractional slot concentrated winding (FSCW) permanent magnet (PM) motor, which provides a guidance for the low vibration design of FSCW PM motor. The implementation of the method includes: Based on Nyquist Shannon sampling theorem, the modulation effect of electromagnetic force in the air gap is obtained, and the electromagnetic force component that contributes the most to the electromagnetic vibration of the FSCW PM motor is determined. The equivalent analytical model of PM flux density is established to obtain the phase relationship between different flux density harmonics. According to Maxwell stress equation, the internal relationship between each order of flux density harmonics and electromagnetic force harmonics is obtained. A new magnet structure of the PM motor is designed, and specific flux density harmonics are injected to reduce the electromagnetic force and electromagnetic vibration of the FSCW PM motor.