Intelligent electric machine Control protection system
Technical field
The present invention relates to electro-mechanical arts, particularly a kind of be can intelligent monitoring control multiple electric motors intelligent electric machine Control protection system.
Background technology
Work with civil buildings or industrial and mining establishment, often use the application such as the control to multiple electric motors and protection, as in building automatic control system for blower fan, the operation of pump class, control, protection, measurement or communication;The control protection etc. of manufacturing enterprise's automation equipment; in prior art; the control of multiple electric motors and protection are completed typically by the control circuit of the composition such as relay, catalyst; complex circuit; the components and parts related to are a lot; manufacturing cost is higher; intelligent power distribution can not be met and realize remotely monitoring and energy conservation demand with energy management system; function is less; situation in motor operation course cannot be carried out comprehensively real-time control and protection; therefore, it is necessary to existing electric machine control system is improved.
Summary of the invention
Present invention aims to the existing electric machine control system circuit described in background technology complicated, the problems such as manufacturing cost is high, it is provided that a kind of circuit is simple, and communication reliability is good, controls the intelligent electric machine Control protection system of functional diversities.
The technical scheme realizing the purpose of the present invention is as follows:
A kind of intelligent electric machine Control protection system, it includes host computer, fieldbus, several CPS control and protective switching devices, the COM1 of host computer is connected with the COM1 of each CPS control and protective switching device by fieldbus, the end of incoming cables of each CPS control and protective switching device main contact is connected with three phase mains, each leading-out terminal connects to form major loop with the winding of corresponding motor, the input port able to programme of each CPS control and protective switching device connects control loop, CPS control and protective switching device is set to input port Communication Control mode able to programme, the power port of CPS control and protective switching device is connected with single phase poaer supply.
Described host computer connects fieldbus by RS485 converting interface.
Described control loop includes switch control circuit; switch control circuit includes normally closed key switch and normally opened key switch; connecting with normally closed key switch in the loop that normally opened key switch composes in parallel with the normally opened auxiliary contact of CPS control and protective switching device, is connected to the input port able to programme of CPS control and protective switching device.
Two external control mode port short circuits of described CPS control and protective switching device.
The intelligent electric machine Control protection system of the present invention is in use; quantity according to actually used motor arranges the CPS control and protective switching device of respective numbers; host computer is connected by bus with the COM1 of CPS control and protective switching device; the control mode of CPS control and protective switching device is set to input port Communication Control mode able to programme; connect at input port able to programme and control loop, control loop and include switch control circuit.Motor can be realized different control defencive functions by the difference of CPS Protection parameters is arranged.Switch control circuit can realize the on-the-spot on-off control of CPS control and protective switching device, and host computer realizes the remote centralized control to motor.
The advantage of the intelligent electric machine Control protection system of the present invention is as follows: the intelligent electric machine Control protection system of the present invention is collection host computer technology, field bus communication technology, intelligent CPS control and protective switching device technology intelligent motor controls system, this system can be used for the execute-in-place of multiple electric motors and controls and remote intelligent centralized Control, realize data to transmit in real time, communication and motor running condition detection, system hardware structure is simple, while simplifying secondary circuit, the on-the-spot setting with remote synchronization to detection and the Protection parameters in real time of the various operational factor of motor and amendment is realized by fieldbus;Given full play to intelligent, can the advantage of communication CPS control and protective switching device, there is overload, under-voltage, underload, stall, disconnected equal multiple electrical fault detect and diagnostic function;With communication function, facilitate networking, be beneficial to centralized Control;With multiple measurement functions such as electric current, voltage, power, temperature;With analog output function, with residual current protecting function etc..Protection parameters is adjustable, dropout rank is adjustable;There is measurement electric current, the isoparametric function of voltage;Possess pre-/report to the police, consult the functions such as historical failure record, logout.System communicatively provides comprehensive management diagnosis information, makes the electrical device status data transparency of system, it is achieved automatically gathers and analyzes, and can provide all kinds of form;Energy resource consumption situation can be measured, adds up, analyzes, provide foundation for power consumption and optimization of cost structure;Detailed, clear and definite electric equipment operation situation can be provided for electric personnel, the data that electrical management attendant is run by equipment are made to carry out planned plant maintenance and service work, greatly improve effective operation ratio of equipment, improve the work efficiency of attendant.System can effectively realize in production process or in building management control to functions such as the fault diagnosis of motor and centralized Control.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the intelligent electric machine Control protection system of the present invention;
Fig. 2 is the major loop schematic diagram of the intelligent electric machine Control protection system of the present invention;
Fig. 3 is the intelligent electric machine Control protection system secondary control loop schematic diagram of the present invention;
Fig. 4 is intelligent electric machine Control protection system and the power supply connection diagram of the present invention;
In figure, 1 is host computer, and 2 is fieldbus; 3 is CPS control and protective switching device, and 4 is COM1, and 5 is main contact; 6 is motor, and 7 is three phase mains, and 8 is input port able to programme; 9 is external control mode port; 10 is power port, and 11 is RS485 converting interface, and 12 is normally closed key switch; 13 is normally opened key switch, and 14 is normally opened auxiliary contact.
Detailed description of the invention
Below in conjunction with accompanying drawing 1 to accompanying drawing 4, the specific embodiment of the present invention is carried out detailed illustrating:
Embodiment 1
Plant intelligent electric machine Control protection system, it includes host computer 1, fieldbus 2, several CPS control and protective switching devices 3, the COM1 4 of host computer 1 is connected with the COM1 4 of each CPS control and protective switching device 3 by RS485 converting interface 11 and fieldbus 2, the end of incoming cables of each CPS control and protective switching device main contact 5 is connected with three phase mains 7, each leading-out terminal connects to form major loop with the winding of corresponding motor 6, the input port able to programme 8 of each CPS control and protective switching device 3 connects control loop, two external control mode port 9 short circuits of CPS control and protective switching device 3, it is set to input port 8 Communication Control mode able to programme, the power port 10 of CPS control and protective switching device 3 is connected with single phase poaer supply.
Embodiment 2
Control loop described in aforementioned schemes includes switch control circuit; switch control circuit includes normally closed key switch 12 and normally opened key switch 13; connecting with normally closed key switch 12 in the loop that normally opened key switch 13 composes in parallel with the normally opened auxiliary contact 14 of CPS control and protective switching device 3, is connected to the control port of CPS control and protective switching device 3.
Above-mentioned embodiment is only the simplest embodiment of the present invention; in actual applications; can arrange at CPS control and protective switching device peripheral circuit according to the needs of user and control loop accordingly; and major loop is adjusted accordingly; intelligent electric machine Control protection system can be made to realize the extension of the functions such as various reduced-voltage starting, multispeed electric machine control, motor reversible operation control; these simple alternative; broadly fall into the simple replacement of the solution of the present invention, all should fall within the scope of protection of the present invention.