Intelligent Chinese character displaying solid soft starter

Abstract

The invention provides an intelligent Chinese character display solid-state soft starter, and belongs to the technical field of the motor soft starter. The invention solves the problems that a motor generates secondary pulse with heavy current by adopting a Y-Delta starter or a self-coupling voltage-reduced starter, so that the price of a variable frequency starter is high; and the prior analog type and digital intelligent liquid crystal Chinese character display soft starter is less in functions and inconvenient in operation. The soft starter is characterized in that a signal collected from the motor is transmitted to an MCU through a signal processing circuit and processed by the MCU; on the one hand, the processed signal is transmitted to a liquid crystal display for display, on the other hand, the processed signal is transmitted to a thyristor to trigger the processing of a control circuit, so as to form a triggering control signal to control a thyristor module contactor and the voltage in a main circuit; clock data read by the MCU from a clock circuit is stored in an E<2>PROM storage unit; and the software composition process is solidified in the MCU. The invention adopts the processing of a high-speed singlechip, an RTX-51 real-time operating system is internally embedded, a secondary menu of the graphic liquid crystal display is operated, and the functions of the measurement, the control, the protection and the failure record are integrated, so that the operation is direct-viewing and simple, and the performance is reliable.

Description

technical field [0001] The invention belongs to the technical field of motor soft starters, and in particular relates to an intelligent liquid crystal Chinese display solid-state soft starter. Background technique [0002] In order to reduce the impact on the power grid and machinery and equipment when the motor is started, the traditional method is to use a Y-△ starter or a self-coupling step-down starter to realize the step-down start of the motor, but these methods still cause the There is a secondary impact of large current when the voltage is high, and the starting method is not flexible; although the frequency converter has a better effect on the soft start of the motor, because the price of the frequency converter is very high, it is rarely used in a simple starting place; my country's solid-state soft The starter started late, but has developed rapidly in the past few years. It has experienced the development process from analog to digital and then to intelligent LCD d...

AI Technical Summary

Problems solved by technology

[0002] In order to reduce the impact on the power grid and machinery and equipment when the motor is started, the traditional method is to use a Y-△ starter or a self-coupling step-down starter to realize the step-down start of the motor, but these methods still cause the There is a secondary impact of large current when the voltage is high, and the starting method is not flexible; although the frequency converter has a better effect on the soft start of the motor, because the price of the frequency converter is very high, it is rarely used in a simple starting place; my country's solid-state soft The starter started late, but has developed rapidly in the past few years. It has experienced the development process from analog to digital and then to intelligent LCD display, but its functions are less and the operation is not convenient.

Images