Network type all-digital motor soft starter

Abstract

The invention relates to a network type all-digital motor soft starter which is characterized in that a control module structure combining a micro-programmed control unit (MCU) and a complex programmable logic device (CPLD) is adopted and is respectively connected with a voltage detection module, a current detection module, a trigger driving module, a keyboard display module and a network communication module so as to form the network type all-digital motor soft starter. The network type all-digital motor soft starter leads a voltage signal and a current signal to be converted into a digital signal and a logic signal so as to realize the functions of all-digital phase compensation, digital phase shift (with the phase shift accuracy of 0.05 degree), phase loss protection, automatic detection of phase sequence, overload protection, wide pulse or double-narrow-pulse trigger and the like, and ensures a motor to be more stably and reliably started and stopped, thus protecting a power grid, the motor and load equipment. Furthermore, the network communication module can be used for networking, so that remote monitoring can be realized. A circuit is simple in structure, high in integration level, phase control accuracy and reliability, good in stability and high in cost performance.

Description

A network-type all-digital motor soft starter technical field The invention belongs to a motor energy-saving operation technology, relates to a three-phase AC motor soft start technical scheme, in particular to a network type all-digital motor soft starter. Background technique At present, when domestic AC motors are directly started, especially when large-capacity motors are directly started, the impact on the power grid is very large. The power grid, the motor itself, the load and the mechanical equipment have a large instantaneous impact, and at the same time greatly reduce the life of the equipment. There are many applications where momentary shutdown of the motor is not allowed. For example: if the water pump system of high-rise buildings and buildings is shut down instantly, it will cause equipment damage. In order to reduce and prevent equipment damage, the motor needs to be stopped gradually, that is, soft stop, and a soft starter can meet this requirement. The ...

AI Technical Summary

Problems solved by technology

The electric energy consumed by the electric motor accounts for about 50% of the total electric energy, and the load of 70% of the electric motor is operated between light load and full load, which brings a lot of waste to the electric energy consumed by the electric motor

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