In a method and a compensation arrangement for compensating detent torques of identically constructed synchronous motors, a no-load detent torque and a bad detent torque are measured on a reference motor as a function of a rotor position relative to a stator. A differential detent torque for the reference motor is determined by subtracting the measured no-load detent torque from each measured bad detent torque, and an operating-point-dependent spectral component of the differential detent torque is determined, A model function modeling the spectral component as a function of the operating point is then formed, and a first compensation current, which generates a compensation torque that compensates a detent torque at the instantaneous operating point with a value of the model function, is superimposed for each of the identically constructed synchronous motors on a setpoint current when operating at an instantaneous operating point in a predetermined first operating range.

A method for adaptive motor control includes acquiring current parameters in an operation process of the motor at a current moment; determining a type of a region in which the motor operates at the current moment according to the current parameters; triggering a corresponding motor model according to the type of the region in which the motor operates at the current moment; and inputting the current parameters into the corresponding motor model, generating control parameters for motor operation according to the current parameters, and controlling the operation of the motor according to the control parameters for motor operation. An apparatus and a computer-readable storage medium are also disclosed. In comparison with the conventional motor control which uses the single nonlinear model, the motor control method disclosed herein can greatly improve the reliability of the control.

A method for operating an electrically commutated machine. In at least one method step, in particular in at least one method step of overmodulation operation of the electrically commutated machine, a precommutation angle of the electrically commutated machine is set depending on an efficiency of the electrically commutated machine.

A method for estimating one or more of the following quantities from an electromechanical machine and/or component, the method comprising the creation of a photorealistic numerical model of the electromechanical machine or parts of it, a measurements step for combining outputs of physical sensors of which at least one is an imaging device for visualizing the external surface of the physical electromechanical machine in at least one 2-dimensional image, an estimation step combining the photorealistic numerical model and measurement step to provide an estimate of desired electromechanical quantities, wherein the estimation step is based at least on the usage of a similarity metric between the (at least one) two dimensional image of the electromechanical machine or parts of it and the images generated by the photorealistic numerical model.

A motor parameter tracking method, which can dynamically track motor parameters includes: exciting, with a voltage excitation signal, a motor to operate, and acquiring at least one actual voltage across two terminals of the motor and an actual current flowing through the motor in an operating state; modelling a voltage error of the motor based on the at least one actual voltage and the actual current to obtain a voltage error function of the motor; and performing iteration on at least one motor parameter based on the voltage error function and a preset iterative step. With the method, the difference between different batches of motors can be adaptively adjusted, and parameter changes caused by a motor temperature, a motor posture and the like can be dynamically tracked. All motor parameters are provided with a same step, which reduces the difficulty of parameter adjustment and the sensitivity of algorithms to parameters.

The invention relates to a method of controlling a drive, in particular an electric drive, of an industrial machine, in which method a drive control controls a drive motor and the drive motor drives a mechanical system having one or more coupled components. The method is characterized in that the drive control carries out a simulation of the mechanical system of the machine by means of a simulation model and performs a feedforward control of the drive motor based on the simulation.

A system for reducing at least one of motor loss or motor drive loss in a vehicle. The system includes a motor designed to convert electrical energy into torque. The system also includes a sensor designed to detect motor data corresponding to at least one of a motor torque or a motor speed of the motor. The system also includes a memory designed to store testing data including optimized current commands for multiple combinations of motor torques that were determined during testing of the motor or a similar motor. The system also includes a speed or torque controller coupled to the motor, the sensor, and the memory and designed to receive a speed or torque command and to determine a current command signal usable to control the motor based on the speed or torque command, the testing data, the detected motor data, and an artificial intelligence algorithm.

The invention relates to an apparatus for determining a temperature of a rotor of an electric machine. The apparatus comprises an interface and a computing device. Input variables which are dependent on the operation of the electric machine are received via the interface. The computing device calculates, by means of a physical model, a first contribution to the heat transfer on the rotor on the basis of at least one of the input variables. In addition, the computing device calculates, by means of an artificial intelligence model, a second contribution to the heat transfer on the rotor on the basis of at least one of the input variables. The computing device calculates the temperature of the rotor on the basis of the first contribution and the second contribution to the heat transfer on the rotor.

Disclosed herein are a motor control apparatus and method. The motor control apparatus includes a compensation signal generator configured to apply a DC-Link voltage (V.sub.Link) for driving a motor to a parameter map preset in order to estimate a gain and phase of a motor torque ripple generated when the motor is driven according to a motor command current and a motor rotation speed, and to generate a compensation signal (i.sub.comp) for compensating for the motor torque ripple corresponding to a current input motor command current (i.sub.q*), motor rotation speed (.sub.m), and DC-Link voltage (V.sub.Link), and a current controller configured to control the current of the motor by controlling an inverter such that a compensation command current (i.sub.q*.sub._comp), generated by reflecting the compensation signal (i.sub.comp), in the motor command current (i.sub.q*), coincides with a motor drive current (i.sub.q) supplied to the motor from the inverter.

A method and a device for estimating the torque ripple T.sub.TR of an electric motor connected to a load. An ideal rotational speed .sub.ideal of the electric motor is determined from an actuating torque T.sub.set_UUT for the electric motor. An output torque T.sub.shaft is measured at the load and a moment of mass inertia J of the electric motor in the controlled system of a control circuit. The ideal rotational speed .sub.ideal is adjusted by a controller of the control circuit on the basis of the real rotational speed .sub.UUT measured at the electric motor in such a way that the current torque ripple T.sub.TR is generated as a manipulated variable of the controller.