Braking controlling method for point-to-point position servo of induction machine

Abstract

The invention discloses a braking controlling method for the point-to-point position servo of the induction machine. The energy consumption braking servo phase trajectory of the induction machine runs commonly along the optimum switched-line, which is the time price suboptimum braking controlling method, the braking controlling method is that: the induction machine runs at the predetermined maximum speed according to the error amount deltaX of the initial displacement coordinate X2 and the target displacement coordinate X of the controlled moving object, when the induction machine reach the displacement coordinate X1 of control amount state switch shifting, the Bang-Bang controller in the braking controlling system sends out a braking signal, the power inverter outputs a variable stator braking current with the amount in the certain function relation with the rotor rotating speed omega[r], so that the energy consumption braking phase trajectory of the induction machine runs along the optimum switched-line, accordingly the time price of the target displacement coordinate X is optimal, and the variable current braking energy consumption is less, thus having theory innovation and practical value.

Description

technical field [0001] The invention relates to the technical field of precision servo control, in particular to a braking control method for fast, precise and efficient point-to-point position servo of an induction motor. Background technique [0002] Point-to-point positioning is essentially a position servo servo system controlled by digital technology based on the position closed-loop feedback signal. Its fundamental task is to realize the fast and accurate tracking of the position command by the actuator. At present, the servo servo system is developing in the direction of high precision, fast response, intelligence, and low energy consumption, which puts forward higher and higher requirements for servo control methods. Due to its large capacity and high reliability, induction motors are suitable for a very wide range of servo fields, covering all sectors of the national economy, such as the positioning control of machine tools in the machining process, and the metallur...

AI Technical Summary

Problems solved by technology

In order to shorten the braking convergence time, it is necessary to increase the constant braking current of the stator, but in practical applications, the maximum value of the stator current will be limited by many factors, such as inverter, motor overheating, inverter overcurrent, etc. From the perspective of braking efficiency, it is also not desirable to blindly increase the braking current in exchange for the optimization of the time cost.

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