CN104795793A

CN104795793A - Microcomputer motor protection monitoring device

Info

Publication number: CN104795793A
Application number: CN201410019013.3A
Authority: CN
Inventors: 胡晓峰; 戴顺辉
Original assignee: Shanghai Look And Bearing Development In Hi-Tech Co Ltd
Current assignee: Shanghai Look And Bearing Development In Hi-Tech Co Ltd
Priority date: 2014-01-16
Filing date: 2014-01-16
Publication date: 2015-07-22

Abstract

The invention discloses a microcomputer motor protection monitoring device comprising a main control unit module, a power module, a state input module, a state output module, an analog input module, an analog output module, a communication module, and a display module. The device can achieve the functions of thermal overload protection, over-current protection, under-load protection, over-voltage protection, under-voltage protection, single-phase grounding protection, leakage protection, external fault protection, starting timeout protection, quick-break protection, open-phase protection, current imbalance protection, tE time protection, negative phase sequence protection, motor thermal protection, connector thermal protection, number-of-starting-times limiting protection, contactor breaking capacity protection, and contactor fault protection, so as to achieve the purposes of comprehensive protection functions and effective increase of electric safety.

Description

A kind of microcomputer motor protective monitoring device

Technical field

The present invention relates to a kind of motor protection monitoring technique field, the particularly protection of microcomputer type low-tension motor, monitoring, control technology field.

Background technology

Microcomputer motor protective monitoring device general at present all has thermal overload, overcurrent, underload, overvoltage, under-voltage, single-phase earthing, electric leakage, external fault, start time-out, quick-break, disconnected phase, the protections such as current imbalance, some devices also have the tE time, negative-phase sequence, thermal protection for motors, some devices are also had to have number of starts restriction, breaking capacity of contactor, contactor error protection, few device has connector Thermal protection, so far a device possessing above all defencive functions is not found, and each protection all ensures the safe operation of power equipment from different aspect, they are the guarantees of safety utilization of electric power.

Summary of the invention

The object of the invention is to overcome the incomplete deficiency of existing microcomputer motor protective monitoring device defencive function, devising the microprocessor Motor Protective Device supervising device that a kind of defencive function is comprehensive, effectively increase Electrical Safety.Its technical scheme adopted is: comprise main control unit module, power module, quantity of state input module, quantity of state output module, Analog input mModule, analog output module, communication module and display module form in interior structure, it is characterized in that: quantity of state input module, quantity of state output module, Analog input mModule, analog output module, communication module and display module all with main control unit model calling, Analog input mModule realizes three-phase current, three-phase voltage, leakage current, the pre-buried thermocouple of motor, connector heat sensor inputs, quantity of state input module realizes on-off state input, main control unit module realizes the functions such as protection, detection, record according to input signal, quantity of state output module realizes trip protection, warning, controlling functions, analog output module realizes analog signal change and send function, communication module realizes system data function of exchange, display module provides operation interface to realize human-computer dialogue, device is provided with the structure of thermal overload, overcurrent, underload, overvoltage, under-voltage, single-phase earthing, electric leakage, external fault, starting time-out, quick-break, disconnected phase, current imbalance, tE time, negative-phase sequence, thermal protection for motors, connector Thermal protection, number of starts restriction, breaking capacity of contactor, contactor error protection, thus reach defencive function comprehensively, the object of effective increase Electrical Safety.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Wherein: 1-main control unit module, 2-communication module, 3-display module, 4-power module, 5-Analog input mModule, 6-analog output module, 7-quantity of state input module, 8-quantity of state output module.

Fig. 2 is analog output module;

Fig. 3 is Analog input mModule;

Fig. 4 is quantity of state output module;

Fig. 5 is quantity of state input module.

Embodiment

Below in conjunction with accompanying drawing, the invention will be further described:

See accompanying drawing 1, main control unit module (1) is the core of device, MCU adopts the MSP430F249 of TI company, there is abundant internal hardware resources, computing is carried out to input signal, logic analysis, send control or protection act, produce data record, power module (4) is accessible to be handed over, direct current 220V power supply, the power supply that each module needs is provided, display module (3) provides the man-machine interface of optimization, all measurement data can be inquired about, record data, management data, and can inquire about and adjust various protection definite value and device parameter, communication module (2) provides different fieldbus modes, meet different system requirement, Analog input mModule (5) has voltage to input, electric current inputs, electric leakage input, thermocouple inputs, heat sensor inputs, analog output module (6) provides multi-signal change to send 4-20mA signal to export, quantity of state input module (7) provides 13 tunnel input passive bus inputs, quantity of state output module (8) provides 5 tunnels to report to the police and trips and control to export, defencive function can be realized comprehensive, effective increase Electrical Safety.

See accompanying drawing 1, Analog input mModule (5) and quantity of state input module (7) issue main control unit module (1) the signal gathered, operational analysis is carried out by main control unit module (1), send instruction or information exports to analog output module (6) and quantity of state output module (8), analog output module (6) can user need electric quantity signal change into 4-20mA export to long-range DCS or other table meter carry out showing or controlling, quantity of state output module (6) can perform tripping operation, report to the police, divide-shut brake controls, remote control, Deng the action of outlet, complete the control to motor and the warning to user, power module (4) provides the power supply of needs for modules, the various Protection parameters of setting device, defencive function can be realized comprehensive, effective increase Electrical Safety.

Claims

1. a microcomputer motor protective monitoring device, comprise main control unit module, communication module, display module, power module, Analog input mModule, analog output module, quantity of state input module and quantity of state output module structure composition, it is characterized in that: unit module, communication module, display module, power module, Analog input mModule, analog output module, quantity of state input module, quantity of state output module all with main control unit model calling; Device is provided with the structure of thermal overload, overcurrent, underload, overvoltage, under-voltage, single-phase earthing, electric leakage, external fault, starting time-out, quick-break, disconnected phase, current imbalance, tE time, negative-phase sequence, thermal protection for motors, connector Thermal protection, number of starts restriction, breaking capacity of contactor, contactor error protection.