CN201490948U

CN201490948U - Networking control frequency changer system

Info

Publication number: CN201490948U
Application number: CN2009201940574U
Authority: CN
Inventors: 刘秋辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-04
Filing date: 2009-09-04
Publication date: 2010-05-26
Anticipated expiration: 2019-09-04

Abstract

The utility model discloses a networking control frequency changer system which comprises a host machine and at least one slave frequency changer, wherein the host machine and the slave frequency changers have a bus type topology connection relation, and the host machine monitors the slave frequency changers through a communication protocol; the host machine and the slave frequency changers adopt an RS 485 communication interface, and a bus is an RS485 bus; the host machine is a computer or a programmable controller or a frequency changer used as the host machine; and the host machine and the slave frequency changers are connected into a control network through the bus to conveniently and reliably realize the concentrated and uniform control of a plurality of motors or mutual matching of the plurality of motors so as to finish a certain action process. If the control process of the frequency changer needs to be changed, only a control program needs to be upgraded on line through the network, thereby saving complicated works that maintenance personnel go to a site to upgrade one by one, thus the operation is simpler and more convenient. The networking control frequency changer system is widely applied to the aspect of motor centralized control.

Description

The frequency convertor system of networking control

Technical field

The utility model relates to the frequency convertor system of a kind of control system, particularly a kind of networking control.

Background technology

To be the on-off action that utilizes power semiconductor device be transformed to the electric energy control device of another frequency with power frequency supply with frequency converter, and it is widely used in aspects such as Electric Machine Control.Frequency converter mainly is made up of main circuit and control circuit.Traditional Frequency Converter Control system controls the non-constant of flexibility separately by motor of the predefined control program realization of the controller that links to each other with the control circuit of frequency converter; Go to upgrade in the scene or download control program is in controller again if the change control procedure just must manually be rushed towards, and high and necessary independent operation of Change Control Procedure cost operated extremely trouble; If realize the centralized and unified control of a plurality of motors or will realize that a plurality of motors are worked in coordination finishing certain motion flow, then traditional single inverter control system seems powerless especially.

The control input end that is connected respectively to the slave transducer control circuit by the input/output port of a main frame is also arranged traditionally, directly control each frequency converter slave respectively by main frame, but because the input/output port resource of main frame is limited, this has just greatly limited the installation quantity of slave frequency converter, thereby the quantity of controlled motor is restricted too, and be very restricted with the length of cable that the control input end mouth of frequency converter is connected by the input/output port of main frame, cable can not be oversize, and control signal is easy to be subjected to extraneous electromagnetic interference, be easy to generate wrong control signal, make the reliability and stability of The whole control system can not get ensureing.

The utility model content

In order to solve above-mentioned technical problem, the purpose of this utility model provides a kind of convenience, reliable, the frequency convertor system of being convenient to central controlled networking control.

The technical scheme that its technical problem that solves the utility model adopts is:

The frequency convertor system of networking control comprises main frame and at least one frequency converter slave, and described main frame and frequency converter slave are the bus-type topological connection relations, and main frame is by communication protocol monitoring slave frequency converter.

Further, described main frame comprises a computer and a RS232-RS485 modular converter, and the RS232 communication interface of computer is connected with an end of RS232-RS485 modular converter, and the other end of RS232-RS485 modular converter is connected with the RS485 bus.

Further, described main frame is programmable logic controller PLC, and the RS485 communication interface of programmable logic controller PLC is connected with the RS485 bus.

Further, described main frame is a frequency converter, and the RS485 communication interface of main frame frequency converter is connected with the RS485 bus.

Further, the RS485 communication interface of described slave frequency converter is connected with the RS485 bus.

Further, described main frame also comprises the communication interface of wired connection or wireless connections, and main frame is connected to control centre by cable network or wireless network, forms large-scale centrally controlled network system.

Further, described communication protocol is a kind of all-purpose language MODBUS agreement that is applied on the electronic controller.

Further, described frequency converter as main frame or slave comprises Power Entry Module, the output of Power Entry Module is connected with power regulator module, the output of power regulator module is connected with signal processing module and signal driver module, the output of signal processing module is connected to the input of signal driver module, the output of signal driver module is connected with inversion module, and the output of inversion module is as the output interface of frequency converter.

The beneficial effects of the utility model are: main frame and slave frequency converter are linked to be Control Network by bus, realize the centralized and unified control of a plurality of motors easily and reliably, realize perhaps that a plurality of motors are worked in coordination to finish certain motion flow; The frequency convertor system of this networking control can be configured to centralized control or control separately neatly, when the frequency converter extension set separately separately control time as wanting change control procedures, then only need by the on-line updating of network control program, saved the attendant and rushed towards the on-the-spot loaded down with trivial details work of upgrading one by one, operated more simple and convenient; The quantity of native system slave frequency converter helps the upgrading expansion of system without limits.Owing to adopt the RS485 bus, the networking distance of main frame and slave can greatly improve; Main frame by MODBUS protocol monitor slave frequency converter, makes the operation safety and reliability on the RS485 bus; Each main frame is connected to control centre by wired or wireless network, can realizes ultra-large centralized and unified controlled function.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is many slaves of single host networking topological diagram of the present utility model;

Fig. 2 is a single host list slave networking diagram of the present utility model;

Fig. 3 is the hardware block diagram of the utility model embodiment as main frame or slave frequency converter;

Fig. 4 is the Power Entry Module circuit theory diagrams of the utility model embodiment;

Fig. 5 is the power regulator module circuit theory diagrams of the utility model embodiment;

Fig. 6 is the signal processing module circuit theory diagrams of the utility model embodiment;

Fig. 7 is the signal driver module circuit theory diagrams of the utility model embodiment;

Fig. 8 is the inversion module circuit theory diagrams of the utility model embodiment.

Embodiment

With reference to Fig. 1, the frequency convertor system of networking control comprises main frame and at least one frequency converter slave, and described main frame and frequency converter slave are the bus-type topological connection relations, and main frame is by communication protocol monitoring slave frequency converter.

Described main frame and slave frequency converter adopt the RS485 communication interface, and described bus is the RS485 bus.

Described main frame comprises computer and a RS232-RS485 modular converter, and the RS232 communication interface of computer is connected with an end of RS232-RS485 modular converter, and the other end of RS232-RS485 modular converter is connected with the RS485 bus.

Described main frame is programmable logic controller PLC, and the RS485 communication interface of programmable logic controller PLC is connected with the RS485 bus.

Described main frame is a frequency converter, and the RS485 communication interface of main frame frequency converter is connected with the RS485 bus.

The RS485 communication interface of described slave frequency converter is connected with the RS485 bus.

Described communication protocol is a kind of all-purpose language MODBUS agreement that is applied on the electronic controller.

The frequency converter of networking control provides RS485 communication interface general in the Industry Control to the user.Communications protocol adopts the MODBUS standard agreement, this frequency converter can be used as slave and has identical communication interface and adopt the upper machine communication of identical communications protocol, realization is to the centralized monitor of frequency converter, the user also can use a frequency converter as main frame in addition, by RS485 interface linking number platform frequency converter slave, realize the remote operation of user to frequency converter.

Described main frame also comprises the communication interface of wired connection or wireless connections, and main frame is connected to control centre by cable network or wireless network, forms large-scale centrally controlled network system.

Fig. 2 is that main frame is a computer, and the RS232 interface of computer changes the connected mode of RS485 module and slave frequency converter realization single host list slave by RS232.Single slave still is many slaves, and flexible configuration is convenient.

With reference to Fig. 3, described frequency converter as main frame or slave comprises Power Entry Module, the output of Power Entry Module is connected with power regulator module, the output of power regulator module is connected with signal processing module and signal driver module, the output of signal processing module is connected to the input of signal driver module, the output of signal driver module is connected with inversion module, and the output of inversion module is as the output interface of frequency converter.

With reference to Fig. 4, after the input of three-phase mains, Power Entry Module converts three-phase alternating current to direct current through the D2 rectifier, carries out filtering through capacitor C 5, C36, C35, C37 again.

With reference to Fig. 5, power regulator module mainly is made up of Switching Power Supply, and Switching Power Supply is unsettled direct voltage, be transformed into stable+24V ,+15V ,+5V and the required direct voltage of drive plate, power for signal processing module and signal driver module.

With reference to Fig. 6, signal processing module mainly is made up of singlechip controller, memory, RS485 interface circuit and signal output apparatus, the master controller of present embodiment adopts the MB90462B of Fuji master chip, and it is powerful, and signal handling capacity and antijamming capability are strong.Memory is selected serial EEPROM chip 24C04 for use, the RS485 interface circuit is realized by SN75176B, signal output apparatus is imported singlechip controller to the three phase mains signal by operational amplifier, by measuring the three phase mains signal parameter of output, regulates the output signal parameter automatically.

With reference to Fig. 7, six tunnel control signals of signal processing module output after optocoupler 3120 isolation and processing and amplifying, become the drive signal that can drive the back inverter, make it be operated in optimum state; Another road brake signal is isolated and processing and amplifying through optocoupler 3120 too.

With reference to Fig. 8, the alternating current that inversion module becomes dc inverter phase place mutual deviation 120 to spend, frequency and voltage are controlled by microprocessor.Among Fig. 8 the direct voltage on the bus is reverse into output frequency and the variable alternating current of output voltage through six IGBT integrated circuits; Another one IGBT integrated circuit is reverse into the brake signal of Electric Machine Control.

More than be that preferable enforcement of the present utility model is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite of the utility model spirit, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.

Claims

1. the frequency convertor system of networking control, it is characterized in that: comprise main frame and at least one frequency converter slave, described main frame and frequency converter slave are the bus-type topological connection relations, main frame is by communication protocol monitoring slave frequency converter.

2. the frequency convertor system of networking control according to claim 1 is characterized in that: described main frame and slave frequency converter adopt the RS485 communication interface, and described bus is the RS485 bus.

3. the frequency convertor system of networking control according to claim 2, it is characterized in that: described main frame comprises a computer and a RS232-RS485 modular converter, the RS232 communication interface of computer is connected with an end of RS232-RS485 modular converter, and the other end of RS232-RS485 modular converter is connected with the RS485 bus.

4. the frequency convertor system of networking control according to claim 2, it is characterized in that: described main frame is programmable logic controller PLC, the RS485 communication interface of programmable logic controller PLC is connected with the RS485 bus.

5. the frequency convertor system of networking control according to claim 2, it is characterized in that: described main frame is a frequency converter, the RS485 communication interface of main frame frequency converter is connected with the RS485 bus.

6. the frequency convertor system of networking control according to claim 2, it is characterized in that: the RS485 communication interface of described slave frequency converter is connected with the RS485 bus.

7. the frequency convertor system of networking control according to claim 1 and 2, it is characterized in that: described main frame also comprises the communication interface of wired connection or wireless connections, main frame is connected to control centre by cable network or wireless network, forms large-scale centrally controlled network system.

8. the frequency convertor system of networking control according to claim 1 and 2, it is characterized in that: described communication protocol is a kind of all-purpose language MODBUS agreement that is applied on the electronic controller.

9. the frequency convertor system of networking control according to claim 1 and 2, it is characterized in that: described frequency converter as main frame or slave comprises Power Entry Module, the output of Power Entry Module is connected with power regulator module, the output of power regulator module is connected with signal processing module and signal driver module, the output of signal processing module is connected to the input of signal driver module, the output of signal driver module is connected with inversion module, and the output of inversion module is as the output interface of frequency converter.