Control method and experiment platform of driving system of permanent magnet synchronous motor

Abstract

The invention belongs to the technical field of motor control and discloses a control method and an experiment platform of a driving system of a permanent magnet synchronous motor. The experiment platform comprises a permanent magnet synchronous motor controller, a vehicle simulation load, a permanent magnet synchronous motor driving rack and a temperature measurement system; the control method comprises the steps that magnetic field directional control is controlled based on an optimal signal injection strategy; the magnetic field directional control is used for online estimating the temperature of a stator winding of the permanent magnet synchronous motor; a loss model is established; an active heat management control strategy is executed for performing dynamic limitation on the currentand the temperature of the permanent magnet synchronous motor through the estimated stator winding temperature; and efficiency optimization control of the permanent magnet motor is carried out on thebasis of the constructed loss model based on an improved golden section method. By virtue of the control method and the experiment platform, the operation performance limit of the driving motor underthe electric heating constraint can be maximized, the reliability of the electric automobile can be improved and the maintenance cost can be lowered.

Description

Technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a control method and an experimental platform of a permanent magnet synchronous motor drive system. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: [0003] With the global energy crisis and environmental pollution becoming increasingly prominent, new energy vehicles have become the future development direction of the international automotive industry, and the clarion call for accelerated development has been sounded. In recent years, with the continuous progress of power battery technology and electric drive technology, electric vehicles have become the commanding height and growth point of new energy vehicles in the future, and are the common strategic choice of major countries and automakers. It can be firmly believed that electric vehicles are bound to gain broader development prospects in the journey ...

AI Technical Summary

Problems solved by technology

[0008] At present, although the existing research discusses the problem of optimal control of motor efficiency, it does not consider the active thermal optimal control under the constraints of the actual thermal state of the motor.

[0009] In the existing technology, the control accuracy of the data is poor in the estimated stator winding temperature using the active thermal management control strategy to dynamically limit the current and temperature of the permanent magnet synchronous motor

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