Intelligent control method and system for target operation point of permanent magnet synchronous motor for vehicle

Abstract

The invention discloses an intelligent control method and system for a target operation point of a permanent magnet synchronous motor for a vehicle. The target operation point is used as an operation intention of a vehicle driver or an intelligent vehicle autonomous decision-making unit at the next moment. The intelligent control method can be summarized into one-step construction, two-step searching, three-step positioning and four-step locking, and the one-step construction is to construct a possible target operation area range at the next moment by taking the current moment as a reference operation point; the two-step searching is to lock a target operation point in an exploratory search mode; the three-step positioning is the optimal three configuration selection and action time of the range of the position of the decision target operation point; and the four-step locking is a time sequence segmented execution mode for positioning three kinds of configuration action time. From the aspect of implementation, the three steps and the time sequence locking function can be divided into a multi-step hybrid control application execution module and a time sequence positioning control application execution module, so that the inverter is controlled, and the permanent magnet synchronous motor is driven to meet the operation intention requirement.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, and in particular relates to an intelligent control method and system for a target operating point of a permanent magnet synchronous motor for vehicles. Background technique [0002] With the rapid development of the national economy, the problems of energy security and environmental protection have become increasingly prominent. The conversion and upgrading from fossil energy kinetic energy to electric drive has become an inevitable trend and choice. The internal logic is the efficiency of electric drive and the process of using new energy technology. Zero emission, no pollution. With the people's yearning and pursuit of a better life, vehicles have gradually transformed from the attributes of transportation tools to the space requirements of production and life, and from transportation to intelligent and networked information interaction subjects. Therefore, n...

AI Technical Summary

Problems solved by technology

With the popularization of the depth and breadth of the application of permanent magnet synchronous motors in vehicles, the requirements for the efficiency, power density, and cost of the motor and its drive system are getting higher and higher. Various features further increase the difficulty of system control

[0004] The current industrialized permanent magnet synchronous motors for vehicles usually adopt the vector control method and the direct torque control method. The vector control adopts the multi-loop PI control to follow the operation intention. The control response time is long, and parameter tuning is required, which is cumbersome and A lot of practical experience is required, and the direct torque control method has a large steady-state torque ripple, and the low-speed characteristics are not ideal

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