Embodiments of this application provide a torque obtaining method and device, a motor controller, and a readable storage medium. The torque obtaining method includes: obtaining a rotation speed of a motor; obtaining a current of the motor; obtaining a flux linkage of the motor; determining an electromagnetic torque of the motor based on the current and the flux linkage; and inputting the rotation speed and the electromagnetic torque into a preset status observer, and obtaining an observed value of an actual output torque of the motor, where the observed value is output by the status observer. The obtaining method is intended to obtain the actual output torque effectively, simply, and accurately.

A rotating equipment system with in-line drive-sense circuit (DSC) electric power signal processing includes rotating equipment, in-line drive-sense circuits (DSCs), and one or more processing modules. The in-line DSCs receive input electrical power signals and generate motor drive signals for the rotating equipment. An in-line DSC receives an input electrical power signal, processes it to generate and output a motor drive signal to the rotating equipment via a single line and simultaneously senses the motor drive signal via the single line. Based on the sensing of the motor drive signal via the single line, the in-line DSC provides a digital signal to the one or more processing modules that receive and process the digital signal to determine information regarding one or more operational conditions of the rotating equipment, and based thereon, selectively facilitate one or more adaptation operations on the motor drive signal via the in-line DSC.

A rotating equipment system with in-line drive-sense circuit (DSC) electric power signal processing includes rotating equipment, in-line drive-sense circuits (DSCs), and one or more processing modules. The in-line DSCs receive input electrical power signals and generate motor drive signals for the rotating equipment. An in-line DSC receives an input electrical power signal, processes it to generate and output a motor drive signal to the rotating equipment via a single line and simultaneously senses the motor drive signal via the single line. Based on the sensing of the motor drive signal via the single line, the in-line DSC provides a digital signal to the one or more processing modules that receive and process the digital signal to determine information regarding one or more operational conditions of the rotating equipment, and based thereon, selectively facilitate one or more adaptation operations on the motor drive signal via the in-line DSC.

Provided is a control device capable of automatically determining whether or not an inertia estimation function needs to be activated. The control device 10 is for an electric motor and comprises: a first inertia estimation unit 11 that estimates whether or not there has been a change in the inertia of an object to be driven, on the basis of at least one among first information pertaining to an operation program or operation settings for a device comprising the electric motor, second information obtained from a detection device for detecting the shape of the object to be driven by the electric motor, and third information indicating the operation state of the electric motor; and a second inertia estimation unit 12 that estimates the inertia of the object to be driven if the first inertia estimation unit 11 has estimated that there has been a change in the inertia of the object to be driven.

The invention relates to a method for operating an electric machine (100) having a power converter (100) and multiple phases, in which method, phase currents flowing through the phases during operation of the electric machine (100) are determined and are used for continued operation of the electric machine (100), the phase currents being determined taking account of a fundamental wave and at least one harmonic of the current profile of each phase current.

The invention relates to a method for operating an electric machine (100) having a power converter (100) and multiple phases, in which method, phase currents flowing through the phases during operation of the electric machine (100) are determined and are used for continued operation of the electric machine (100), the phase currents being determined taking account of a fundamental wave and at least one harmonic of the current profile of each phase current.

A motor drive control apparatus includes energization systems for energizing a motor having a plurality of independent winding sets, with the energization systems corresponding one-to-one to the winding sets. A plurality of sensors is provided for each of the energization systems. A controller is provided for each of the energization systems and controls energization of the corresponding winding set based on output signals of the corresponding sensors. A plurality of sub power supply paths is provided for their respective energization systems. Each sub power supply path connects a power supply path for supplying power to the corresponding sensors and a power supply path in another energization system. A semiconductor switch is provided for each of the sub power supply paths, and, between two different energization systems, when one of the two energization systems exhibits a sensor power supply failure, electrically connects the power supply paths of these two energization systems.

A motor drive control apparatus includes energization systems for energizing a motor having a plurality of independent winding sets, with the energization systems corresponding one-to-one to the winding sets. A plurality of sensors is provided for each of the energization systems. A controller is provided for each of the energization systems and controls energization of the corresponding winding set based on output signals of the corresponding sensors. A plurality of sub power supply paths is provided for their respective energization systems. Each sub power supply path connects a power supply path for supplying power to the corresponding sensors and a power supply path in another energization system. A semiconductor switch is provided for each of the sub power supply paths, and, between two different energization systems, when one of the two energization systems exhibits a sensor power supply failure, electrically connects the power supply paths of these two energization systems.

The invention relates to a method for operating an electric machine (100) having a stator having stator windings and a rotor, having a converter (110) and having a sensor (120) for detecting a measurement value, wherein the converter (110) has direct current connections, alternating current connections and semiconductor switches for connecting one of the direct current connections to one of the alternating current connections in each case, wherein the stator windings are connected to the alternating current connections, the semiconductor switches of the converter (110) being closed and opened at specific changeover times, a measurement being carried out by the sensor (120) at specific measurement times, the specific changeover times being adapted to the specific measurement times such that in a specific time interval about a specific measurement time the semiconductor switches are not closed and opened, and a control unit (150) and a computer program for carrying out said method.

The invention relates to a method for operating an electric machine (100) having a stator having stator windings and a rotor, having a converter (110) and having a sensor (120) for detecting a measurement value, wherein the converter (110) has direct current connections, alternating current connections and semiconductor switches for connecting one of the direct current connections to one of the alternating current connections in each case, wherein the stator windings are connected to the alternating current connections, the semiconductor switches of the converter (110) being closed and opened at specific changeover times, a measurement being carried out by the sensor (120) at specific measurement times, the specific changeover times being adapted to the specific measurement times such that in a specific time interval about a specific measurement time the semiconductor switches are not closed and opened, and a control unit (150) and a computer program for carrying out said method.