Abstract: A system including a generator and a controller. The generator includes a permanent magnet generator (PMG), and an exciter. The controller manages operations of the generator. The controller includes an alternating current to direct current (AC-to-DC) converter that generates a direct current (DC) voltage, an exciter drive that provides a DC current to the exciter of the generator using the DC voltage created by the AC-to-DC converter in accordance with the control signal, and a regulator controller that drives the active AC-to-DC converter.

Abstract: Provided is a sensorless control device for a DC fuel pump that may be downsized as compared to a conventional control device for a DC fuel pump and may implement the same operation at a relatively low cost, and the sensorless control device for a DC fuel pump.

Abstract: A device for driving a plurality of motors and an electric apparatus includes a first and a second capacitor, an inverter connected to a DC terminal, a multi-phase motor connected to the inverter, a single-phase motor serially connected with the multi-phase motor, and a controller configured to control the inverter. For starting the single phase motor during operation of the multi-phase motor, the controller is configured to perform, during an alignment period, an alignment of a rotor of the single-phase motor and perform, during a voltage compensation period, a voltage compensation for compensating a voltage change of a DC terminal neutral point between the first capacitor and the second capacitor based on the alignment of the rotor of the single-phase motor.

Abstract: Prior to starting of first and second synchronous motors, direct-current excitation is performed to pull in rotors of the synchronous motors to a designated position. In the direct-current excitation, a difference between a value of a direct current flowing through the first synchronous motor and a value of a direct current flowing through the second synchronous motor is reduced. For example, d-axis currents and q-axis currents corresponding to three-phase currents flowing through the motors are determined; a d-axis voltage command value for making one of the d-axis currents larger in absolute value equal to a d-axis current command value is determined, and a q-axis voltage command value for making one of the q-axis currents larger in absolute value equal to a q-axis current command value is determined; an inverter is driven using the determined d-axis voltage command value and q-axis voltage command value.

Abstract: Methods and power tools for sensorless motor control. One embodiment provides a method for automatic control switching for driving a sensorless motor (150) of a power tool (100). The method includes determining, using a motor controller (224), a first load point based on user inputs (232) and determining, using the motor controller (224), a first motor control technique corresponding to the first load point. The method also includes driving the motor (150) based on the first motor control technique. The method further includes determining, using the motor controller (224), a change from the first load point to a second load point and determining, using the motor controller (224), a second motor control technique corresponding to the second load point. The method includes driving the motor (150) based on the second motor control technique.

Abstract: A motor drive control device driving a motor having a first system coil and a second system coil, the motor drive control device comprising: a first drive circuit controlling energization of the first system coil; a second drive circuit controlling energization of the second system coil; and a signal output circuit detecting a first voltage that is a voltage at a middle point of the first system coil and a second voltage that is a voltage at a middle point of the second system coil, and outputting an output signal concerning whether or not any one of the first system coil and the second system coil is in an open state, based on a detection result of the first voltage and a detection result of the second voltage.

Abstract: A control system for mechanical braking devices is provided. The control system is designed to selectively slow, stop, and lock in place rotating machinery that is turning at an RPM that may be much greater than zero while helping minimize shock load on the rotating machinery. A fan brake control system is provided which can include: a fan brake; a position sensor; a microcontroller; an actuator; an operator interface; and a fan motor interface.

Abstract: A rotating electric machine control device has an electronic control unit, or an ECU that controls driving of a motor having motor windings, and includes mutually-communicable plural control units. The control unit includes a basic instruction calculation unit, a field-weakening calculation unit, and a current control calculation unit and a PWM (pulse width modulation) output unit. The current control calculation unit and the PWM output unit generate a PWM signal based on d-axis current instruction values and q-axis current instruction values that are calculated based on basic current instruction values and field-weakening d-axis current instruction value. At least a part of the instruction values used for generation of the PWM signal is shared by the plural control units.

Abstract: A method for determining a rotation variable of a rotatably mounted rotor of a mechanically commutated electric motor, having a motor current path formed between two brush elements of the electric motor, and leading via the commutator bars contacted by the brush elements, and via coil windings of the rotor electrically connected to said commutator bars, wherein an oscillating input signal is fed into the motor current path and the rotation variable is determined with the aid of a ripple of a resultant output signal, said ripple being due to the mechanical commutation of the motor current path.

Abstract: A motor controller comprises a driving circuit, a selection circuit, a sensorless control circuit, a Hall signal control circuit, a detection circuit, a first input terminal, and a second input terminal. The Hall signal control circuit may be coupled to a Hall sensor via the first input terminal and the second input terminal. When each of the voltage of the first input terminal and the voltage of the second input terminal is at a low level, the motor controller is operated in a sensorless driving mode. When one of the voltage of the first input terminal and the voltage of the second input terminal is at a high level, the motor controller is operated in a Hall control driving mode.

Abstract: The disclosure relates to a method for determining phase currents of a rotating multiphase electrical machine fed by means of a PWM-controlled inverter. In this case, injection voltages applied in at least one stipulated PWM period are determined. An evaluation direction for a phase current vector is also determined and a division of current measurements for the individual phase currents is determined on the basis of the evaluation direction. The phase currents are then determined on the basis of the previously determined division of the current measurements.

Abstract: A method for determining the rotational speed and the angle of rotation of a motor shaft of a mechanically commutated DC motor from the measured progression of time of the ripple in the motor current and in the motor terminal voltage occurring during the commutation. A motor state model of the DC motor, to which the measured motor terminal voltage and the measured motor current, an estimated load torque, an estimated rotational speed and an estimated angle of rotation of the DC motor are supplied to a Kalman filter as input variables. By running the motor state model, the Kalman filter provides an estimated current, an adjusted rotational speed and an adjusted angle of rotation of the DC motor as output variables.

Abstract: A motor control system configured to be mounted to a movable object that moves by using a drive motor, the motor control system comprising: a sensor configured to detect an output requested to drive the movable object; a battery configured to supply electric power to the drive motor; and circuitry configured to control the drive motor such that a requested amount of rotary power of the drive motor is output in a specified output range, the requested amount of the rotary power of the drive motor being set on the basis of a detection value of the output sensor.

Abstract: Systems, methods, and apparatus for detecting movable barrier disengagement are provided. A movable barrier operator system includes a motor configured to be coupled to a movable barrier and move the movable barrier, a motor sensor configured to measure a load value of the motor, communication circuitry configured to receive, from a remote control, a state change request to cause movement of the movable barrier, and a processor circuit. The processor circuit is configured to cause actuation of the motor in response to receipt of the state change request, detect, based on the load value, a disengagement between the motor and the movable barrier, and cause a communication to be sent, in response to detecting the disengagement, to a remote server, the communication indicative of motor disengagement.

Abstract: A method and apparatus for quasi-sensorless adaptive control of a high rotor pole switched-reluctance motor (HRSRM). The method comprises the steps of: applying a voltage pulse to an inactive phase winding and measuring current response in each inactive winding. Motor index pulses are used for speed calculation and to establish a time base. Slope of the current is continuously monitored which allows the shaft speed to be updated multiple times and to track any change in speed and fix the dwell angle based on the shaft speed. The apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprises a switched-reluctance motor having a stator and a rotor, a three-phase inverter controlled by a processor connected to the switched-reluctance motor, a load and a converter.

Abstract: A rotation speed regulation system for an electric tool switch includes a controller, a resistance regulating copper foil electrically connected to the controller, and a resistance regulating reed matched with the resistance regulating copper foil. The resistance regulating copper foil includes a first foil and a second foil separated from each other. The first foil is an intact long strip foil. The second foil includes a plurality of short-circuit gold fingers arranged at equal intervals in the middle part and a full-resistance foil and a zero-resistance foil at both ends. The width of the short-circuit gold finger is 0.27 mm, and the distance between two adjacent short-circuit gold fingers is 0.2 mm. An inclination angle ? is formed between the short-circuit gold finger and the sliding direction of the resistance regulating contact end, ? is 107°-110° and the length L of the contact strip is 2.3-2.9 mm.

Abstract: A rotary electric machine control device for controlling driving of a rotary electric machine including a plurality of winding sets, includes: a plurality of drive circuits; and a plurality of control units, each of which includes: an individual current limit value calculation unit; a current limit value calculation unit; and a control signal calculation unit. The current limit value calculation unit switches between a current limit value sharing mode and a current limit value non-sharing mode. An electric power steering device includes: the rotary electric machine control device; the rotary electric machine that outputs an assist torque for assisting a steering operation of a steering wheel by a driver; and a power transmission unit that transmits a driving force of the rotary electric machine to a drive target.

Abstract: A vehicle driving device includes an inverter which drives a motor. The inverter includes: a three-phase bridge circuit including a plurality of switching elements; a three-phase short circuit which short-circuits three phases of the motor via the three-phase bridge circuit; and a control circuit. The control circuit includes: a microprocessor which drives the three-phase bridge circuit; a malfunction notification circuit which outputs a malfunction notification signal when the microprocessor is malfunctioning; and a latch circuit which holds the malfunction notification signal outputted from the malfunction notification circuit. The control circuit outputs a three-phase short-circuit drive signal which drives the three-phase short circuit, based on the malfunction notification signal held by the latch circuit.

Abstract: A drive system for an electrically driven motor vehicle and a method for operating the drive system, which increases the service life of a power module which is a component of a pulse inverter of the drive system.

Abstract: The present disclosure provides an efficient control system and method for a brushless motor with a wide working range, which are applied to an aerospace vehicle energy system. The system of the present disclosure includes a power supplying module, a first DC-DC circuit, a battery pack, a second DC-DC circuit, an anti-reverse-connection circuit, an electronic speed control (ESC), a brushless direct current motor (BLDC), an airborne controller and a communication link. Electric energy from the power supplying module is configured to charge the battery pack via the first DC-DC circuit, and electric energy of the battery pack sequentially flows through the second DC-DC circuit and the anti-reverse-connection circuit to energize the ESC, wherein output voltage of the second DC-DC circuit and throttle signal input of the ESC are controlled in real time by the airborne controller according to a power demand of an aircraft.