A vector control electric actuator based on dsp

Abstract

The invention relates to a vector control type electric actuator based on a DSP. The vector control type electric actuator is composed of a power supply module, a power module, a processing module and a mechanical module. Due to the fact that the vector control technology is adopted, the load capacity and the dynamic performance of the electric actuator are improved; due to the fact that a speed sensorless method is adopted, the problem that the speed measurement error is too large when a low-resolution speed sensor is used is solved; due to the fact that software is used for calculating the output torque of the actuator, the accuracy is guaranteed, and system cost can be reduced; a positioning curve can be generated automatically, flexible starting and flexible stopping are achieved, mechanical shock can be effectively reduced, and the service life of the actuator is prolonged; due to the fact that the DSP serves as the control core, a control algorithm is obtained in real time.

Description

technical field [0001] The invention belongs to the technical field of industrial automation, and in particular relates to an electric actuator, in particular to a control system and method of an electric actuator with DSP as the core and adopting vector control. Background technique [0002] The electric actuator is a field instrument that uses a motor to drive the valve to control the flow of the medium. Compared with the pneumatic actuator, it has the advantages of convenient energy supply, simple structure, high precision, and frequent action. Therefore, it is widely used in electric power, chemical industry, metallurgy and other industries have been widely used. The electric actuator consists of two parts, one is the motor part, which is mainly a DC or AC motor, most of which are asynchronous motors; the other is the power circuit, which is used to drive the motor. The key to electric actuators is the control technology of the motor. Foreign countries are the first to...

AI Technical Summary

Problems solved by technology

The present invention adopts the following technical solutions: (1) adopts vector control technology to improve the carrying capacity and dynamic performance of the actuator; (2) adopts the method of no speed sensor, calculates the speed in real time according to the voltage and current of the motor, and solves the current problem of using low resolution The speed calculation error caused by the high-speed speed sensor is too large; (3) The software method is used to calculate the output torque of the actuator, which not only ensures the accuracy, but also reduces the cost of the system; (4) has the ability to automatically generate the positioning curve Function to realize "soft start" and "soft close", which can effectively reduce mechanical impact and improve the life of the actuator; (5) DSP is used as the control core to realize the real-time realization of the control algorithm

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