In this load control system, when linkage security authentication based on hardware and software by linkage between at least a controller and a power converter has been established, a function that enables the power converter to be used for a predetermined purpose is generated by the software.

A motor-driven integrated circuit comprises a PWM output unit and an overcurrent comparator coupled with the PWM output unit. The overcurrent comparator receives a detection signal and compares the detection signal with a reference value. When the detection signal is larger than the reference value, the overcurrent comparator outputs an overcurrent protection signal to control the PWM output unit enter an overcurrent protection mode.

A method for searching an excitation signal for a motor and an electronic device. The method includes: randomly generating M excitation signals for the motor, and determining whether the M excitation signals allow vibration sense obtained after the motor is driven to be expected vibration sense; if yes, outputting this excitation signal as an optimal excitation signal; if no, calculating the M excitation signals according to a preset genetic algorithm to obtain a new generation of M excitation signals, and then determining whether the new generation of M excitation signals allow vibration sense obtained after the motor is driven to be the expected vibration sense, until the optimal excitation signal is obtained. In the present disclosure, the optimal excitation signal for obtaining the expected vibration sense after the motor is driven can be quickly found, and thus an efficiency thereof is high.

In the field of mobile devices, a motor driving method, a terminal device, and a computer-readable storage medium are disclosed. In the present disclosure, a current state of an application target in a current running program is obtained in real-time, a drive signal is generated according to the current state of the application target and is used to drive a motor to produce a vibration sensation corresponding to the current state, and the motor is driven to vibrate according to the generated drive signal. In this way, the motor vibration can be dynamically changed in real time as the use scenario of the mobile terminal changes.

A method for identifying a resistance value (R.sub.r) of the rotor of an electric induction motor (M), including determining a reference voltage (u.sup.ref.sub.S) on the basis of a chosen value ({circumflex over (R)}.sub.r) for the resistance of the rotor of the electric motor, applying a control voltage (u.sub.S) to the electric motor, the control voltage being determined on the basis of the reference voltage (u.sup.ref.sub.S), acquiring the values of the currents (i.sub.1, i.sub.2, i.sub.3) measured in the three phases of the electric motor, so as to deduce a stator current (i.sub.S) of the electric motor therefrom, comparing the obtained stator current (i.sub.S) with a predetermined value (i.sup.ref.sub.S), correcting the value ({circumflex over (R)}.sub.r) used for the resistance (R.sub.r) of the rotor and applying steps a) to d) until obtaining a stator current (i.sub.S) equal to the predetermined value.

A motor control apparatus (2) according to the present disclosure is configured to control motors (#1-#3), automatically acquire identification information of a plurality of encoders (#1-#5), the encoders (#1-#5) being configured to be connected in series under a control of the motor control apparatus (2) and to detect position information of the motors (#1-#3) or position information of a mechanical apparatus configured to be driven by the motors (#1-#3), and store the identification information and the motor control unit in a non-volatile memory (11) in association with each other.

An integrated electrical pump comprises a motor, an oil pump driven by the motor, and a pressure control system. The pressure control system controls a hydraulic pressure of the oil pump according to a motor speed of the motor, an oil temperature and a pressure command. An oil pressure control method of the integrated electrical pump is also provided.

Disclosed is a method for control loop performance monitoring in a variable frequency drive. A set of data is inputted to one or more control loop performance monitoring algorithms comprised in the variable frequency drive, wherein the set of data comprises at least a measured value of a process variable, a target value for the process variable, a set of controller input parameters, and a controller output. An output from each of the one or more control loop performance monitoring algorithms is obtained based at least partly on the set of data. One or more key performance indicator values indicative of control loop performance are determined based at least partly on the output from each of the one or more control loop performance monitoring algorithms. The set of controller input parameters is adjusted based at least partly on the one or more key performance indicator values.

One aspect of the present disclosure provides an electric power tool including an output shaft, a motor, a manual switch, a memory device, a first circuit, and a second circuit distinct from the first circuit. The memory device stores two or more sets of job information. Each of the two or more sets of job information includes at least one operation setting of the motor for performing an associated tightening operation. The first circuit (i) receives one set of job information and (ii) drives the motor in accordance with the at least one operation setting included in the one set of job information based on the manual switch being or having been manually operated. The second circuit outputs a next set of job information from the memory device to the first circuit based on the first circuit having completed driving the motor.

A computer-implemented method of predicting conditions of machines as well as a corresponding data processing system, computer program and computer-readable medium are disclosed. A technical specification of a machine is received. A data set including at least one current operational parameter of the machine is continuously received. A current load of the machine is continuously derived based on the provided technical specification and the received data set via a knowledge base. A current condition of the machine is continuously predicted by integrating over the derived current load and all previously derived current loads.