CN201114166Y - Pump intelligence control system based on PROFIBUS-DP communication interface - Google Patents

Abstract

The utility model relates to an intelligent control system of pumps based on a PROFIBUS-DP communication interface and belongs to the intelligent control technical field of pumps. The intelligent control system of pumps is provided with a PROFIBUS-DP bus, an interface circuit and a microprocessor DSP-based control circuit, and carries out a time sampling analysis, monitors and displays parameters of an electromotor with the support of related programs; when the parameters exceed required parameter values, alarming information is sent, wherein the required parameter values can be designed through a keyboard. In the FCS system, the intelligent control system of pumps exchanges data with a field bus interface (Anybus-s) in a mode of slave and according to specifications, runs specific equipment and carries out related monitoring under the field bus configuration. The intelligent control system of pumps is provided with a man-machine interface MMI (function keys and a LCD screen), is capable of carrying out remote operation, adopts a modularized structure with a simple structure and reliable work, and fulfills the requirements of modern industrial system.

Description

Pump intelligence control system based on the PROFIBUS-DP communication interface

Technical field

The utility model relates to a kind of pump intelligence control system based on the PROFIBUS-DP communication interface, belongs to the pump field of intelligent control technology.

Background technology

Pump uses very extensive in industrial control system, and most process industries all must use pump.Along with the application of field bus control system (FCS) in industrial enterprise, original pump unit is directly controlled with electrical control cubicles, do not have the parameter monitoring function, can not with the supporting application of field bus control system, can not satisfy the requirement of modern industry system.Make pump performance can support fieldbus, and have monitoring function, the Based Intelligent Control function of on-the-spot and remote parameter, make pump do self-control, and be in the operation of high efficiency point according to the state of arts of production procedure, must development pump intelligence control system.

The PROFIBUS fieldbus is most widely used in the world field bus technique, and the annual growth of its product reaches 25%, is fastest-rising field bus technique.Yet, dominated by The foreign chicken products for many years on the market at home, because the monopolization of its fancy price and technology increases the production cost of domestic enterprise greatly, thereby reduced Enterprises'Competitiveness always.Therefore, exploitation has the pump intelligence control system that has the PROFIBUS-DP communication interface of independent intellectual property right, has bigger realistic meaning.

Summary of the invention

The purpose of this utility model provides a kind of pump intelligence control system based on the PROFIBUS-DP communication interface, the electrical control cubicles that solves existing pump can not be supporting with field bus control system, and the expensive deficiency of PROFIBUS fieldbus, realize that pump group and control system high speed low cost communicate to connect.

The purpose of this utility model is achieved through the following technical solutions, a kind of pump intelligence control system based on the PROFIBUS-DP communication interface, comprise pump, the electromagnetic varispeed motor of driving pump, control electromagnetic varispeed motor by rectified three-phase circuit, the main circuit that filter circuit and IPM inverter constitute, it is characterized in that described system also is provided with the PROFIBUS-DP bus, interface circuit and be the control core circuit with the DSP microprocessor, the PROFIBUS-DP bus is connected with bus transceiver in the interface circuit, the DSP microprocessor is connected with private communication protocol interface chip SPC3 in the interface circuit, and the PWM output in the DSP microprocessor is through light, electric isolating circuit is connected with IPM inverter in the main circuit.

The DSP microprocessor for the control core circuit by chip TMS320F240, keyboard and display with provide each measuring component and the transducer of analog quantity input to form.

What the analog quantity input signal was provided is flow, lift, rotating speed, power, efficient, bearing temperature, inlet pressure, outlet pressure measuring component and the transducer that places pump and electromagnetic varispeed motor region of interest.

Interface circuit is made up of private communication protocol interface chip SPC3, high speed photo coupling and bus transceiver.

The utility model is by being provided with the PROFIBUS-DP bus, interface circuit and be the control core circuit with the DSP microprocessor, from the analog signal that is installed in measuring component in pump and the motor and transducer after processing and amplifying, be transformed into corresponding analog quantity by microprocessor DSP and pass to the IPM inverter, to change shaft of motor output, be issued to the purpose of control pump in the support of relative program, simultaneously, carry out the timing sampling analysis for the operating condition parameter of motor and reflection environment parameter special seized with terror etc., monitoring shows, as overshoot numerical value, then send warning message, predetermined parameter numerical value can design by keyboard.In addition, the DSP microprocessor is the also built-in I/O channel of variable connector amount shows effects such as the interlock protection of signal for LCD display.In the FCS system, the pump intelligence control system is carried out exchanges data in the mode of slave unit by standard and field-bus interface (Anybus-s), and fieldbus configuration moves concrete equipment down and monitors at the scene.The pump intelligence control system has the man-machine interface (operation keys and LCD display) of local operation, and can carry out remote operation.The utility model adopts modular construction, and simple in structure, reliable operation helps the requirement of modern industry system.

Description of drawings

Fig. 1 is the utility model theory diagram;

Embodiment

Further specify the utility model in conjunction with the accompanying drawings and embodiments, as shown in Figure 1, the utility model is made up of main circuit, control circuit, PROFIBUS-DP bus and PROFIBUS-DP interface circuit.Main circuit is made up of three-phase rectifier, filter and inverter: control circuit is made up of the input of dsp chip TMS320F240, keyboard and display and analog quantity, and wherein analog quantity comprises the major parameter of pump such as flow, lift. rotating speed, power. and efficient, bearing temperature, inlet pressure, outlet pressure etc.: the PROFIBUS-DP interface circuit is made up of private communication protocol interface chip SPC3, high speed photo coupling and bus transceiver.Wherein dsp chip TMS32OF240 is the control unit of pump intelligence control system, is again the part of PROFIBUS-DP interface.

1), main circuit (contain main circuit and based on the main website control circuit of dsp system)

As shown in Figure 1, pump intelligence control system host circuit is to adopt the frequency control drive system of the frequency control motor of sine-wave power driving as execution unit, mainly comprise the electronic executive item of control circuit, main circuit and pump, wherein major loop is by three-phase full wave rectifier circuit, and circuit such as energy storage filter capacitor C1, C2 and IPM three-phase inverter constitute.Dsp chip TMS320F240 includes two 10 analog converters and based on the manager of PWM control (coding units of 6 comparing units, 9 road PWM output, No. 2 photoelectric encoder interfaces).IPM among the figure is an Intelligent Power Module, and that adopt here is the Intelligent Power Module PM15RSH120 of Mitsubishi's electronics, and it not only integrates device for power switching and drive circuit.And inside keeps Performance Detection and supervisory circuits such as electric moter voltage, electric current, pump and motor bearings temperature rise and flow, lift, rotating speed, power, efficient, inlet and outlet pressure.And detection signal can be sent into CPU.Even load accident situation or improper use take place, can guarantee that also IPM self is not damaged.

The PM15RSH120 device is advanced mixing integrated power device.It all is integrated in 6 IGBT cell power devices of three-phase inverter in the device, and it is optimized the drive circuit that separates simultaneously, and drive circuit and protective circuit also are integrated in the device. greatly facilitate the design of drive circuit.The control input of PM15RSH120 can link to each other with photo-coupled transistor, and the gate drive circuit of particular design no longer needs to make the negative supply of IGBT shutoff, has so just simplified drive circuit.

TMS320F240 is that TI company is the dsp chip of a kind of novel, cheap, efficient, the low-power consumption of satisfying that complex motor high-speed figure control requires to design specially, it is integrated in high performance 16 a bit DSPs nuclear and many function peripheral hardwares on the one chip, higher integrated level and stronger operational capability are provided, simultaneously, the cost of goal systems is greatly reduced.Compare with traditional system that is made of 8 or 16 8-digit microcontrollers, the combination of this powerful disposal ability and special-purpose peripheral circuit makes that the target control system effectiveness that is realized is higher, energy consumption is lower, reliability is higher.TMS320F240 also integrated multichannel A/D convertor circuit, CAN controller module, serial communication interface circuit, phase-locked loop clock on sheet produce function peripheral hardwares such as circuit.What is particularly worth mentioning is that its inner integrated task manager module is specifically designed to Electric Machine Control: wherein 3 general purpose timers produce the periodic signal except being used to. also as orthogonal pulses coding unit (QEP), capturing unit, the time-base signal of PWM module: comparing unit and PWM control section provide nearly 9 tunnel comparison/PWM outputs, 6 road PWM output wherein is by a space vector module controls. and have the dead band logic, thus do not need the too much intervention of program just can produce the PWM triggering signal that is used for 6 power switch components of three-phase full-bridge inverter easily. realize control to three phase alternating current motor; Capturing unit (CAP) can be used for catching in time rising/decline cunning of motor poles position signalling, and by the inquiry associated counter value determine rotating speed of motor: orthogonal encoder (QEP) can be judged rotating speed of motor, position and rotation direction then to counting with the orthogonal intersection code signal that photoelectric encoder, magnetic coder produced of motor coaxle.

2), PROUFIBUS-DP communication interface

This interface is directly developed the pump intelligence control system of band ROFIBUS-DP interface with the asic chip SPC3 of DSP and Siemens Company, realization is simple, convenient, has saved cost simultaneously, has dwindled volume.The complete agreement of SPC3 is integrated PROFIBUS-DP physical layer and data link layer, can detect baud rate (9.6K～12M) automatically, the integrated dual port RAM of 1.5K, itself has the address latch function and sheet selects function, automatically performs the slave station state machine of PROFIBUS-DP after powering on.

The PROFIBUS-DP interface mainly is made up of dsp interface and serial bus interface two parts, because dsp chip TMS320F240 has become the DARAM. of the Flash EEPROM of 16K and 544 bytes can satisfy the needs of pump group system and PROFIBUS-DP interface fully at chip integration. therefore need not outer extension memory, thereby simplified the design of hardware circuit greatly.TMS32OF240 is with the dual port RAM of the SPC3 inside external RAM as oneself, by the read-write of dual port RAM is finished the initialization of SPC3 and the exchange of relevant data during application.The request to send signal of SPC3 chip (RTS) sends data-signal (TXD), receives data-signal (RXD), links to each other with bus transceiver SN75ALS176B by high speed photo coupling 6N137, constitutes serial bus interface.

Light, electric isolating circuit adopt existing ripe circuit.

Control system software adopts the method for functional module.Systems soft ware is mainly by main program, the PROFIBUS-DP interface routine, and interrupt service routine, display subroutine, the PI control subprogram is formed with relevant subprogram.

The PROFIBUS-DP interface routine, because complete PROF1BUS-DP agreement that SPC3 is inner integrated, therefore the main task of TMS320F240 is the interruption that produces according to SPC3, the data conversion storage that the main website that SPC3 is received sends, tissue will be issued the data of main website by SPC3, and organize external diagnosis as requested. therefore, the PROFIBUS-DP interface routine comprises SPC3 initialize routine and concrete I/O application program two parts.Wherein the SPC3 initialize routine comprises the interruption that the SPC3 permission is set, write slave station identifier and address. the SPC3 mode register is set, diagnosis buffering area, parameter buffering area, configuration buffering area, address buffer initial length are set, and obtain the data length of the pointer of the pointer of each buffering area and supplementary buffer according to transmission according to above initial value, determine output buffer, input block and pointer.Interrupt routine is mainly used to handle messages such as Pfm, Crg and Ssa.

Claims (5)

1. pump intelligence control system based on the PROFIBUS-DP communication interface, comprise pump, the frequency-conversion and speed-regulation motor of driving pump, the control of conversion adjustable-speed motor by rectified three-phase circuit, the main circuit that filter circuit and IPM inverter constitute, it is characterized in that described system also is provided with the PROFIBUS-DP bus, interface circuit and be the control core circuit with the DSP microprocessor, the PROFIBUS-DP bus is connected with bus transceiver in the interface circuit, the DSP microprocessor is connected with private communication protocol interface chip SPC3 in the interface circuit, and the PWM output in the DSP microprocessor is through light, electric isolating circuit is connected with IPM inverter in the main circuit.

2. the pump intelligence control system based on the PROFIBUS-DP communication interface according to claim 1, it is characterized in that the DSP microprocessor for the control core circuit by chip TMS320F240, keyboard and display with provide each measuring component and the transducer of analog quantity input to form.

3. the pump intelligence control system based on the PROFIBUS-DP communication interface according to claim 2, what it is characterized in that the analog quantity input signal is provided is the measuring component and the transducer of the flow that places pump and frequency-conversion and speed-regulation motor region of interest, lift, rotating speed, power, efficient, bearing temperature, inlet pressure, outlet pressure.

4. the pump intelligence control system based on the PROFIBUS-DP communication interface according to claim 1, it is characterized in that interface circuit is made up of private communication protocol interface chip SPC3, high speed photo coupling and bus transceiver, wherein SPC3 is connected with the PROFIBUS-DP bus by the high speed photo coupling bus transceiver.

5. the pump intelligence control system based on the PROFIBUS-DP communication interface is characterized in that the IPM inverter in the described system adopts Intelligent Power Module PM15RSH120.

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