16results about "General control strategies" patented technology

The present invention relates to an electrical drive system for or in a motor-vehicle, having at least one multi-phase electric machine, which has a double rotor, wherein the double rotor is made from flux-guiding material made of solid material, with a three-stage or multi-stage inverter circuit for driving the electric machine, which has: a controllable three-stage or multi-stage inverter coupled to the electric machine on the output side, which is designed to supply the electric machine with an AC voltage, and an operating mode setting device, which is designed to operate the inverter as a function of at least one parameter influencing the overall efficiency of the electrical drive system, selectively in a three-stage or multi-stage operation or in a two-stage operation.

A multiplexing control apparatus (210) includes: three controllers (C1-C3) that output a digital voltage signal including two-phase voltage command values for a motor (300) in an orthogonal coordinate (fixed coordinate) system (α, β); and a signal control unit that receives the digital voltage signal output from at least two of the three controllers (C1-C3), selects, based on a predetermined priority order, the digital voltage signal output by the controller (C), of the controllers (C) outputting the digital signal input to the signal control unit (211), that does not malfunction and generates and outputs a PWM signal based on the digital voltage signal selected.

Methods, apparatuses and computer program products for movement of rectangular prisms in a multi-dimensional space are provided.

A variety of methods, controllers and electric machine systems are described that facilitate pulsed control of electric machines (e.g., electric motors and generators) to improve the machine's energy conversion efficiency. Under selected operating conditions, the electric machine is intermittently driven (pulsed). The pulsed operation causes the output of the electric machine to alternate between a first output level and a second output level that is lower than the first output level. The output levels are selected such that at least one of the electric machine and a system that includes the electric machine has a higher energy conversion efficiency during the pulsed operation than the electric machine would have when operated at a third output level that would be required to drive the electric machine in a continuous manner to deliver the desired output. In some embodiments, the second output level is zero torque.

A method for operating an electric drive system is provided. For example, a controller retrieves from memory a predictive model indicating a predicted winding temperature associated with a known negative temperature coefficient (NTC) temperature, wherein the predictive model is based on historical NTC temperatures and historical winding temperatures, and one or more operating parameters. The controller receives current NTC information indicating one or more current NTC readings corresponding to one or more switching devices within the inverter. The controller determines an estimated winding temperature corresponding to the motor based on the predictive model and one or more current NTC readings and the current operating parameters. The controller provides instructions based on the estimated winding temperature to adjust the motor input.

The application provides a controller of a motor control module, a control method of a motor and related equipment. A communication end of the controller is connected with an auxiliary driving controller or an automatic driving controller. The controller receives a target speed and a target acceleration sent by the auxiliary driving controller or the automatic driving controller. An output end of the controller is connected with an inverter circuit in the motor control module. Then, the controller controls the inverter circuit to adjust the current output to the first motor in response to a speed adjustment signal. By implementing the application, the control delay of the auxiliary driving or the automatic driving can be reduced, and the safety is good.

To operate electric machines such as motors and generators at higher levels of efficiency.SOLUTION: A boost circuit is arranged to reduce rise and fall times of pulsed power used for pulsed control operation of electric machines. Magnetic energy present in the electric machine at the end of a pulse is extracted by the boost circuit to reduce the pulse fall time. The energy is stored by the boost circuit and then applied at the beginning of a subsequent pulse to reduce the rise time. By reducing rise and fall times compared to a case of not using such a boost circuit, machine efficiency is improved.SELECTED DRAWING: Figure 4

The application discloses a microwave heating temperature tracking control method and system based on a segmented discrete reaching law, and belongs to the field of microwave heating. The application establishes a sliding mode function and a discrete reaching law combined with quasi-sliding mode control according to a mathematical model of a Debye medium microwave heating process in a one-dimensional direction based on the first law of thermodynamics, and obtains a control law. The application sets the error between an expected temperature and an actual temperature as a sliding mode surface, and realizes temperature tracking control of the microwave heating process through the control law. The application can reach the sliding mode surface more quickly, can keep stable in a quasi-sliding mode band, has strong anti-interference ability, and can realize fast heating under the condition of preventing thermal runaway.

This invention relates to the field of electric motor control technology and discloses an electromechanical converter regulation system for compressor drive, comprising: a bus current gradient acquisition unit for acquiring DC bus current gradient; a switching timing calculation unit for reconstructing the switching vector execution timing within the space voltage vector modulation period; and a pulse width signal generation unit for generating switching control signals. When the DC bus current gradient exceeds a preset load mutation threshold, the switching timing calculation unit subtracts the zero vector duration to obtain the adjustment compensation time and injects the adjustment compensation time into the effective vector according to the original ratio of the effective vector. This invention achieves quasi-synchronous offsetting between converter output power and mechanical load fluctuations, compensates for current hysteresis caused by load torque pulsation, suppresses electromagnetic noise, and improves the energy efficiency and robustness of the drive system.

The present application relates to the technical field of motor control, and discloses a disturbance compensation control method of a servo driver, comprising: collecting the running state of a servo motor to construct a port-controlled Hamiltonian dynamics model, and extracting an interconnection matrix and a dissipation matrix; constructing a fractional order hyper-spiral extended state observer to obtain an initial lumped disturbance estimation value; extracting a Hamiltonian energy dissipation residual to adaptively adjust the fractional order hyper-spiral extended state observer, and outputting a high-fidelity disturbance estimation value; constructing a nonlinear dynamic damping matrix based on the high-fidelity disturbance estimation value to perform energy shaping on the servo motor; combining the nonlinear dynamic damping matrix with the port-controlled Hamiltonian dynamics model to establish a matching equation, solving a compound control law to generate a driving signal to control the servo motor. The present application uses energy residual dynamic adjustment observer and reconstructs damping topology to suppress high-frequency chattering and transient oscillation, and improves the anti-disturbance ability of the system.

The present application belongs to the technical field of ship electric propulsion, and particularly relates to a ship electric propulsion dual-mode control system with a multiple redundancy architecture, which comprises: first, accurately obtaining the actual rotating speed and electromagnetic torque of the motor through a redundant sensor group and a two-out-of-three voting logic; then, calculating the load disturbance intensity using time domain difference analysis, and combining with the propeller characteristic coefficient to calculate the deviation between the actual torque and the theoretical hydrodynamic torque, thereby generating a load anomaly index; further, generating a dynamic flexible factor with damping characteristics based on the index using a Sigmoid function and a low-pass filtering logic; finally, weighting and fusing the output instructions of the rotating speed mode and the torque mode according to the factor. The present application can accurately distinguish between normal acceleration and sea wave disturbance, realize smooth and seamless switching between static water steady speed and adverse sea condition protection mode, and effectively avoid control shock and mechanical damage.

The present application belongs to the field of metallurgy, and relates to a high-speed rod hub transmission control method. According to a PLC control signal, a large proportion, small integral and high dynamic characteristic control is adopted in the starting process of a hub motor through a speed regulator, and a small proportion, large integral and steady-state control is adopted in the braking process. When the rolling speed is high, additional torque is added on the main torque channel for real-time dynamic adjustment, so as to shorten the starting time. The present application first proposes dynamic setting of hub control process parameters, and sets the response hub motor control parameters according to the PLC signal in different stages. The present application first proposes a hub control model, additional torque is added on the main torque channel to improve the starting torque of the hub, suppress the current and improve the response speed of the hub motor. According to the operation characteristics of the hub equipment, an advanced control concept is adopted to control the fast response of the hub, so as to ensure the stable operation of the hub at a rolling speed of more than 45 m / s of the high-speed rod production line.

This invention discloses a condition monitoring and control system for a permanent magnet motor driven by an oil drilling rig, relating to the field of permanent magnet motor condition monitoring technology. It includes a data acquisition and construction module, a data preprocessing and feature extraction module, a dynamic monitoring and trend analysis module, a deep learning evaluation module, and a fuzzy control and real-time compensation module. The data acquisition and construction module first acquires real-time operating data of the inverter during operation through data acquisition equipment. The acquired real-time data is stored in a time-series format, and a dataset is established to provide complete and accurate basic data for subsequent analysis and model evaluation. This invention improves the stability, reliability, and energy efficiency of the permanent magnet motor driven by the oil drilling rig through real-time data acquisition, deep learning evaluation, fuzzy control optimization, and error compensation, adaptively adjusting the dead time, reducing short-circuit risk, energy loss, and harmonic damage, optimizing system performance, and improving operating efficiency.

Three controllers of multiplexing control apparatus output a digital voltage signal including two-phase voltage command values for a motor in an orthogonal coordinate system. A signal control unit receives the digital voltage signal output from at least two of the three controllers, selects, based on a predetermined priority order, the digital voltage signal output by the controller, of the controllers outputting the digital signal input to the signal control unit, that does not malfunction and generates and outputs a PWM signal based on the digital voltage signal selected.

The present disclosure relates to a method (100) for controlling an electric machine comprising the steps of determining (101), for a d-axis and a q-axis of the electric machine, a current error of the electric machine. Further, the method (100) comprises the steps of providing (102) the current error to a current controller of said electric machine, wherein the current controller is a FOC current controller. Moreover, the method (100) comprises the step of determining (103), in the current controller, for said d-axis and said q-axis, PI, parameters. The PI parameters comprising a proportional gain value and an integral gain value. Furthermore, the method (100) comprises controlling (104) said electric machine based on said PI parameters to adapt the current.

The application relates to the technical field of motor control, and discloses a voltage self-adaptive control method for an 800V high-voltage platform new energy vehicle motor. The method comprises the steps of parameter initialization, multi-sensor data acquisition and verification, loss coordination optimization, working condition self-adaptive modulation, drive signal generation and closed-loop optimization; by establishing a SiC MOSFET junction temperature-loss quantitative relationship, dynamically adjusting the switching frequency and the dead time, combining the working condition grading modulation and the harmonic suppression technology, the voltage self-adaptive control is realized. The application makes the inverter efficiency greater than or equal to 98.5%, the current harmonic distortion rate THD less than or equal to 5%, and the system operation fluctuation rate less than or equal to 2%, effectively solves the problems of low efficiency and power attenuation in the prior art, and is suitable for efficient and stable control of the 800V high-voltage platform new energy vehicle motor.