Device for performing priority processing on fault of electric actuator based on CPLD and realizing method thereof

Abstract

The invention relates to a device for performing priority processing on the fault of an electric actuator based on CPLD and a realizing method thereof. The device comprises a comparator, an optocoupler, a CPLD, a DSP, a motor excitation power module, an excess-temperature relay and a limit switch. Major loops of the electric actuator are connected with two input pins of the comparator; an output pin of the comparator, the motor excitation power module, the limit switch and the excess-temperature relay placed in a motor winding are connected to the CPLD through the optocoupler; and the CPLD isconnected with the DSP. N 74LS148 in the CPLD is selected to form a priority coder for performing priority processing on input fault signals. The invention reduces the design complexity of the system,saves the hardware space, has the advantages of simple operation, rapid judgment of fault signals, low cost, and the like, realizes double protection of software and hardware, improves the reliability of the system, realizes application of high performance and multifunction and has transportability, time performance and space performance.

Description

technical field [0001] The invention relates to a fault processing technology of an electric actuator, in particular to a logic control device and an implementation method for implementing priority processing of multiple faults of an electric actuator by using a complex programmable logic device (CPLD). Background technique [0002] Electric actuators are widely used in various industrial automation process control links, and are a very important basic equipment. At present, in the electric actuator control system, the reliability and stability of software and hardware are already very high, and the failure of the electric actuator has become the main reason for the failure of the control system, and the fault diagnosis and fault protection of the actuator have been paid more and more attention. . With the development trend of electric actuators in the direction of digitalization, intelligence, and networking, the complexity of electric actuators continues to increase, and ...

AI Technical Summary

Problems solved by technology

Aiming at the characteristics of many faults and complex faults of electric actuators, the priority-based task scheduling strategy uses software-protected programming methods and code reuse. The super-cycle method cannot meet the real-time requirements of resource management and the system, and the system runs with problems. Make wrong actions to expand the scope of the fault, affect the entire system, and even cause serious consequences to production; the hardware to realize the corresponding functions has high cost, low reliability, and imperfect technology

Images