Method for eliminating sparking of electromechanical system

Abstract

The invention discloses a method for eliminating sparking of an electromechanical system. The method includes: when motor starting is needed in program control, a control command is transmitted to switch on an alternating current contact so as to start a motor, time constant is written into a timer simultaneously, the timer is started, command word is written to a single-chip microcomputer special function register PCON to allow a single-chip microcomputer to enter a sleep state without executing programs, in the mean time, only the timer operates, when overflow interruption of the timer occurs, the single-chip microcomputer is awakened, the single-chip microcomputer loads time constant to the timer again and enters the sleep state without executing programs, the procedures are repeated for 5 times until fully suction of the alternating current contact and for nearly 400 milliseconds, starting of the motor is completed, and the timer awakens the single-chip microcomputer to execute programs normally. Sparking is eliminated by using a sleep method, increasing of hardware cost is unnecessary, occupation of a large amount of internal memory is unnecessary, frequent reset of systems is avoided, and the method is short in code, simple and particle, and excellent in effect.

Description

technical field [0001] The invention belongs to the field of electromechanical technology, and relates to a method for eliminating spark interference in an electromechanical system, in particular to a sleep method for eliminating spark interference in an electromechanical system. Background technique [0002] In the intelligent control equipment and products with single-chip microcomputer as the core, it is very important to ensure its reliable operation. In the case of industrial sites, in order to prevent various types of interference, people have taken many effective measures in both software and hardware, such as strengthening power filtering, photoelectric isolation, DC power isolation, AC noise filtering, setting software traps, Increase the watchdog real-time monitoring program operation, etc. Although these measures have greatly improved the anti-interference performance of the application system, and can guarantee the normal operation of the single-chip microcomput...

AI Technical Summary

Problems solved by technology

However, the use of "instruction redundancy" is conditional. First, the "runaway" program must fall into the program area, and secondly, the set redundant instruction must be executed. If these two conditions are not met, the interference will cause a lot of problems. big hazard

[0006] 2. Software trap

However, the strong current interference generated when th

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