Abstract: The present invention discloses a wide voltage adaptable drive and control circuit for hairdryers, which relates to the technical field of AC-DC conversion and comprises a main control-motor driver chip U2, a main power module, a voltage sampling module, and a rectification mode switching module. The voltage sampling module is used to detect a voltage of at least one node in the main power module and provide feedback to the main control-motor driver chip U2. The main control-motor driver chip U2 is used to drive the rectification mode switching module to run based on the voltage fed back by the voltage sampling module, and to switch a running mode of a bridge rectifier sub-module BR1 between a full-wave rectification mode and a voltage doubling rectification mode. The present invention primarily addresses the problem of providing a drive and control circuit for hairdryers with wide voltage adaptability.

Abstract: An electric drive system includes a direct current (DC) power supply, a rotary electric machine connectable to a load, a power inverter module (PIM), and a controller. The PIM includes a bulk capacitor connected to the DC power supply, along with a plurality of power switches. Each power switch has an output side connected to the electric machine and an input side connected to the bulk capacitor. The controller executes a method to estimate an internal temperature of the bulk capacitor as an estimated internal temperature. This occurs in response to an enabling condition. The controller then selectively derates the electric machine in response to the estimated internal temperature.

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: According to the embodiment of the present disclosure, an apparatus of controlling an electromechanical brake may include an inverter configured to supply electric power to an electric motor provided in the electromechanical brake, a gate driver configured to identify an operating state of the inverter, and a controller configured to identify at least one of a rotational speed and a position of the electric motor on the basis of the operating state of the inverter, in which the controller controls switches in the inverter to short a circuit in the inverter on the basis that the rotational speed of the electric motor exceeds an operating speed or the position of the electric motor exceeds a threshold value.

Abstract: A controller for an aircraft assembly. The aircraft assembly includes a permanent magnet motor. The controller is configured to control the permanent magnet motor according to a damping mode. In the damping mode the controller receives electrical energy from the permanent magnet motor, wherein the electrical energy is produced as a result of kinetic energy in the aircraft assembly. The controller uses the electrical energy to send a first signal to control a transfer of electrical energy from the permanent magnet motor to a damping component to provide damping to the permanent magnet motor.

Abstract: A drive apparatus includes a power circuit and a deterioration determining device. The power circuit outputs, to a load, a current including a current component having a frequency determined by a natural frequency of at least one member of the load or a vibratory member to vibrate when receiving vibration resulting from an electromagnetic excitation force generated in the load or by a value of a natural number multiple of a rotation frequency of a rotator that is one of the at least one member. The deterioration determining device generates frequency domain data based on a sensor signal output by a vibration sensor and determines deterioration of the at least one member of the load or the vibratory member based on a value of a frequency spectrum indicated by the frequency domain data at the natural frequency or the rotation frequency used to determine the frequency of the current component.

Abstract: A method includes receiving a first measurement signal representing a first time between transitions of a motor commutation state. The method further includes receiving a second measurement signal representing a second time between transitions of a motor floating terminal voltage. The method further includes determining a motor speed state based on a combination of the first and second measurement signals, determining a motor commutation state based on the motor speed state and the motor floating terminal voltage; and providing a control signal to a motor inverter based on the motor commutations state.

Abstract: An estimation unit estimates a first coil temperature in a state where the motor is stopped, and a second coil temperature in a state where the motor is driven, and the control unit controls the driving of the motor based on the first coil temperature and the second coil temperature.

Abstract: Fly-by-wire vehicle systems and related user interface devices are provided for controlling operation of a vehicle, such as an aircraft. An exemplary user interface includes a first linkage and a second linkage coupled to the first linkage. The first linkage is actuatable about a first pivot point and the second linkage is actuatable about a second pivot point independent of actuation of the first linkage about the first pivot point. The user interface includes a sensing arrangement configurable to obtain a first orientation of the first linkage with respect to a first reference orientation associated with the first pivot point, obtain a second orientation of the second linkage with respect to a second reference orientation associated with the second pivot point, and determine an input command based at least in part on the first orientation and the second orientation.

Abstract: Machine performance, including efficiency, is analyzed in direct frequency domain by measuring the input power to the machine over a range of machine speeds (frequencies, ?). A differentiable mathematical function or model is identified that characterizes the input power vs. speed functional relationship. Successive derivatives of experimental power vs. speed data enable the calculation of coefficients of the mathematical function at a plurality of points (frequencies) in the frequency domain. Performance parameters including machine efficiency, pressure, pressure drag, flow, viscous drag, frictional drag, viscosity and work may be calculated from the coefficients of the mathematical function. One or more desired, optimum or best operating point(s) for machine speed may be defined in terms of the coefficients of the mathematical function or the derived performance parameters.

Abstract: In accordance with various embodiments of the present disclosure, an integrated circuit for determining an angular position of an electric motor having a rotatable shaft and a resolver is provided. In some embodiments, the integrated circuit comprises (i) an angle sampling module adapted to receive a signal from the resolver and to repeatedly determine, at an angle sampling rate, the angular position of the rotatable shaft using the signal from the resolver, (ii) an interpolation module to determine an interpolated value of the angular position of the rotatable shaft at each cycle of a motor control loop rate, and (iii) a motor control module adapted to provide a pulse width modulated (PWM) signal to the motor. The PWM signal is based at least in part on the determined interpolated value of the angular position of the rotatable shaft determined at each cycle of the motor control loop rate.

Abstract: A motor driving redundancy device for an electronic parking brake includes a first motor-driving module configured to supply current to a motor, a first driver module configured to control the first motor-driving module, a second motor-driving module configured to drive the motor, a second driver module configured to control the second motor-driving module, a monitoring module configured to monitor a status of the first motor-driving module and the second motor-driving module, and a processor configured to, when a failure is detected in either the first motor-driving module or the second motor-driving module by the monitoring module, control at least one of the first motor-driving module or the second motor-driving module to drive the motor.

Abstract: A motor controller with a data bit expansion mechanism is provided. The motor controller sets a plurality of pieces of target waveform characteristic data that are used respectively within a plurality of magnetic pole position time intervals to output a motor control output instruction. The motor controller, according to each of the plurality of pieces of target waveform characteristic data, generates a plurality of pieces of sub-target waveform characteristic data in a bit number expansion instruction. The plurality of pieces of sub-target waveform characteristic data are used respectively within a plurality of bit expansion time intervals. The bit number of each of the plurality of pieces of sub-target waveform characteristic data is smaller than an upper limit bit number. The motor controller generates a plurality of bit-expansion waveforms according to the bit number expansion instruction for controlling a motor.

Abstract: A device for the regulation of devices which can be regulated with a 0-10 Vdc and/or PWM command is herein disclosed, the device having at least one power supply input, at least one regulation input adapted to receive external regulation signals, a potentiometer comprising a selector element, the potentiometer being configured to provide a manual voltage regulation, and at least one command output configured to output a command signal towards the devices to be regulated. The device further comprises a switching element configured to cause a switching of said device between a first regulation mode, in which the command signal is generated by said device and is manually adjustable through the selector element of said potentiometer, and a second regulation mode, which allows a regulation of the devices to be regulated via the command signal from the command output based on an external device connectable to the regulation input. A system comprising the above device is also disclosed.

Abstract: A power tool includes a housing, a motor positioned within the housing, an output shaft driven by the motor, the output shaft configured to be coupled to an accessory for operation thereof, a sensing circuit configured to detect, during operation of the power tool, an operating characteristic of the motor, and a controller. The controller is configured to receive a signal from the sensing circuit representing the operating characteristic of the motor, compare the operating characteristic of the motor to a first predetermined threshold, and in response to the operating characteristic exceeding the predetermined threshold, perform a loss of control check on the power tool. Performing the loss of control check includes comparing a detected motion of the power tool to a second predetermined threshold, and tripping loss of control functionality based on whether the detected motion of the power tool exceeds the second predetermined threshold.

Abstract: Disclosed herein are a motor safety control method that can efficiently detect an abnormality of a motor sensor configured to sense a rotational motion of a motor and control a safety operation of the motor based thereon, and a robot for implementing the method. The motor safety control method for a robot may include receiving a first motor value from a high-resolution sensor of a motor, receiving a second motor value from a low-resolution sensor of the motor, and comparing a threshold with a difference between the first motor value and the second motor value, and transmitting an operation signal to a motor driver for the motor to continue or stop operation of the motor.

Abstract: A motor system designed to replace and internal combustion engine. The motor system may include an electric motor and a battery that provides power to the electric motor. The system may also include control electronics to control the battery discharge current. The battery discharge current may be a relatively low current if the motor speed is less than a first threshold. The battery discharge current may be a relatively high current if the motor speed is greater than the first threshold but less than a second threshold. The battery discharge current may be the relatively low current if the motor speed is greater than the second threshold but less than a third threshold.

Abstract: A current measurement apparatus includes a corrector. The corrector calculates an error arising in a measured value of at least one target phase current due to magnetic flux generated from each of multiphase power lines in accordance with an error factor defined for each multiphase power line with respect to the at least one target phase current. The error factor defined for each multiphase power line with respect to the at least one target phase current is a constant value or a variable determined based on (i) one or more shields located between the current sensor and the corresponding multiphase power line and (ii) a distance between the current sensor and the corresponding multiphase power line. The corrector corrects the measured value of the at least one target phase current based on the calculated error.

Abstract: A method for estimating the magnet temperature in an electrical machine carried out by means of an electronic computer involves estimating a value of a total magnetic flux of the electrical machine and estimating a value of a first partial flux, representing a magnetic flux due to a reluctance of the electrical machine. The method also involves the steps of calculating a value of a second partial flux as a function of a difference between said value of the total magnetic flux and said value of the first partial flux and determining a value of a magnet temperature as a function of said value of the second partial flux.

Abstract: Examples include a method for controlling a variable speed drive driving a three-phase electric motor. The method includes measuring current signals in the windings of the electric motor, and determining a current parameter associated to the electric motor based on the current signals. The current parameter includes either a current offset of at least one winding of the electric motor in relation to a zero-current value, or a current misbalance between windings of the electric motor. The method further includes determining an amended control law of the electric motor for decreasing the determined current parameter, and applying pulse width modulation signals on insulated gate bipolar transistors of the inverter based on the amended control law.