CN1121275A - Intellegent controller for triphase motor in pumping unit - Google Patents

Abstract

The present invention relates to an intelligent control of a three phase motor of an oil sucking machine, and comprises a power source circuit, a detecting device, a counting system, a control device, and also switches that are used for setting the opening and the closing operations and the state of the control type and operating the code input and the parameter setting, the switches are connected with the counting system. The intelligent control has simple and reasonable structure, and can adopts the minitype sealing structure, the volume is small, the anti-thief performance is good, and the cost is low, the control and the protection functions are perfect and have the expansibility. The present invention also has the functions of phase-lacking, over-current, over-loading, over voltage-lacking motor protection, and anti-glittering of the electric network, and second start.

Description

The intelligent controller of triphase motor in pumping unit

The present invention relates to a kind of Based Intelligent Control system device of motor, more precisely, belong to a kind of starting of motor of the oil pumper that uses in the oil field and the controller of operation and protection.

Oil pumper is the oil production equipment that extensively adopt in present domestic oil field, electric machine controller of the prior art is made up of relay, so there be the bulky of single unit system, the circuit structure complexity, power consumption is big, the shortcoming of poor reliability, particularly change running status and need open the The whole control case, use inconvenience, and burglar-proof result is poor at present, stolen situation is serious, complete machine cost height; Chinese patent 90213321.7 discloses a kind of oil pumper microcomputerized controller, by bidirectional thyristor, microcomputer, sensitive switch, compositions such as control circuit, its main feature is automatically to regulate the angle of flow of thyristor according to the load of motor, change the terminal voltage of motor, improve the operational efficiency of motor, and the volume of controller decreases, also to the short circuit of motor, phase shortage, overload provides protection, but the volume of this controller is also bigger, can not make one with motor control box, and the change of motor operating state and operational factor lacked authorize protection, circuit structure is complicated and lack autgmentability and compatibility, is not applicable to the open-air atmosphere in oil field very much; Similarly provide the controller or the energy-saving appliance of a protection and an energy-conserving action to be disclosed in the following Chinese patent: CN-92208916.7 to motor; CN-92235309.3; 91207617.8; 92229470.4; the controller circuit structure that these patented technologies disclose is poor; do not take into full account the autgmentability and the compatibility of microcomputer product; the change of running status and parameter is not considered the environment for use in oil field and authorized order etc. is set; can not make one with motor control box on the structure, be destroyed and steal by the people easily.

The objective of the invention is to overcome the deficiencies in the prior art and provide that little, the thief-proof property of a kind of volume is good, autgmentability and compatible strong, and possess the intelligent controller of the triphase motor in pumping unit of the switch that is used for open and close operation and the setting of control mode state and operator password input and parameter setting.

The intelligent controller of triphase motor in pumping unit of the present invention, by supply unit, electric current and voltage check device, computing system with data computation, storage, judgement, the control system of three phase mains circuit is formed, it is characterized in that: computing system is by single-chip microcomputer, data storage, program storage is formed, two are used for open and close operations and two and are used for the direct or through port line extended chip of the switch of control mode state setting and are connected with the single-chip microcomputer of above-mentioned computing system, and above-mentioned four switches that are connected on the computing system are used to input password.

The intelligent controller of triphase motor in pumping unit of the present invention; simple and reasonable for structure; save instrument transformer, the time relay, thermal relay of general motor controlling cabinet etc.; can adopt miniature closed structure; volume is little, and theft-proof is good, and cost is low; control and defencive function improve and have autgmentability, and electric motor protecting function and the anti-electrical network with phase shortage, overcurrent, overload, overvoltage/undervoltage glimmers, the function of reignition.

For introducing the intelligent controller of triphase motor in pumping unit of the present invention in detail, be elaborated below in conjunction with accompanying drawing:

Fig. 1 is the line principle block diagram of the intelligent controller of triphase motor in pumping unit of the present invention;

Fig. 2 is the line map of this controller;

Fig. 3 is power circuit and indicating circuit figure;

Fig. 4 is the voltage sampling line map on each road;

Fig. 5 is the current sampling line map on each road;

Fig. 6 is the winding diagram of contactor;

Fig. 7 is the connection line figure of single-chip microcomputer and program storage and analog to digital converter;

Fig. 8 is the connection line figure of switch and running status note Gai element and output control element and single-chip microcomputer.

Referring to Fig. 1 to 8, particularly Fig. 1 and Fig. 2, the intelligent controller of triphase motor in pumping unit of the present invention, by power circuit 50, electric current and voltage check device 10, has data computation, storage, the computing system of judging 20, the control device 30 of three phase mains circuit is formed, computing system 20 is by single-chip microcomputer 201, data storage 204, program storage 202 is formed, two are used to out, closing operation and two is used for the direct or through port line extended chip of the switch 40 of control mode state setting and is connected with the single-chip microcomputer 201 of above-mentioned computing system 20, the switch 40 that is connected on above-mentioned four on the computing system 20 is used to input password, and the power circuit 50 shown in Fig. 3 is responsible for the power supply of entire controller.

The course of work of this controller is: the electric current and the voltage check device 10 that are connected on the three-phase power line are delivered to computing system 20 to the signal of voltage and current, computing system 20 is according to fixed running status that switch 40 does not have and original set in program or through the parameter of switch 40 inputs above-mentioned signal is sampled, calculated, relatively and judge, carries out open and close or delay process by the power supply of 30 pairs of power lines of control device.

Above-mentioned switch 40 preferably adopts Hall switch, and it cooperates with magnetic pen can realize the input of instructing, and is a kind of reliable noncontact input, guarantees the safety of the person, also unrelated person is played certain false action-proof; The simplest switch is a manual mechanical switch, comprises sensitive switch; Owing in complete machine, adopted the microprocessor of band CPU, also can adopt opto-electronic conversion such as Infrared, ultraviolet light, laser or radio to instruct input, at this moment, the receiving interface of described switch 40 for adapting, adopt the switch of above-mentioned kind kind shape can avoid original control cubicle open and close motor must open the deficiency of cabinet door, the control operation is convenient.

Referring to Figure 4 and 5, above-mentioned checkout gear 10 comprises the voltage and current checkout gear on the three-phase power line, electric current and voltage signal have been arranged, can calculate power consumption parameter such as active power, reactive power, power factor (PF), electric current wherein can adopt current transformer, Hall current converter to detect, voltage wherein can adopt voltage transformer, voltage rectifier, resistance capacitance divider, Hall voltage converter to detect, for the A/D conversion chip, both AC signal can be gathered, also direct current signal can be gathered; This checkout gear also can adopt the running status logic judging circuit, in illustrated embodiment, voltage signal is the halfwave rectifier signal from voltage transformer, and current signal is for converting the direct voltage of halfwave rectifier to by resistance from the current value of current sensor.

Above-mentioned computing system 20 generally is made up of single-chip microcomputer 201, program storage 202, A/D conversion element 203, these functional parts can be independent modules (chip), also can partly or entirely be integrated on the chip piece, according to present level, the model of adoptable single-chip microcomputer is 8031,8051,8096 series; Referring to Fig. 2,7 and 8, adopt 8031 single-chip microcomputers 201 among this embodiment, what link to each other with single-chip microcomputer 201 has a program storage 202, A/D converter 203, a data memory is arranged, preferably electricity erasable memorizer eeprom memory 204 and single-chip microcomputer carry out serial communication and are connected and are used for the set state of storage switch and some artificial parameters that is provided with, delay time for example, overpressure value, under-voltage value, protection and operational factors such as overload values, single-chip microcomputer 201 also links to each other with switch 40, and the interrupt signal of switch by giving a switch of single-chip microcomputer with door 205 also comprises a latch 206 in this circuit; In fact, the various forms of minimum systems of single-chip microcomputer go for the present invention, if detection system provides is logical signals such as overload, overvoltage, then do not need analog to digital converter (A/D chip) in the computing system; For embodiment with A/D chip, can directly carry out AC sampling, directly calculate all required electrical quantitys by single-chip microcomputer, can also carry out hardware or/and software filtering to the signal that will sample, for multiple signals, can be at the pre-installed variable connector of A/D chip, analog switch 4052,4053 etc. for example; The output of single-chip microcomputer and model are that 1413 7 road integrated Darlington transistor chip for driving 207 link to each other in the computing system, this output chip for driving also can adopt photoelectrical coupler, also can adopt triode, chip for driving is connected to control device 30, is used for executive components such as control relay.

Owing in controller of the present invention, adopted single-chip microcomputer, can realize wireless long distance remote control by installing wireless transmission and receiving system additional, also can carry out communication, the operation of control motor and the operation conditions of monitoring motor by power line carrier.

Referring to Fig. 6, control device to three-phase power line of the present invention (or claiming executive component) is controllable silicon or solid-state relay or A.C. contactor or AC vacuum contactor or electromagnetic relay, in Fig. 6, used A.C. contactor, but when using, for increasing the reliability of complete machine, adopt the way of main contacts self-locking.

When control device adopts controllable silicon, also can the control by single-chip microcomputer realize under the delayed firing of the big load of motor and the normal operation situation realizing adjustment to motor terminal voltage according to the load size, with energy savings, improve the operational efficiency of motor, prolong the life-span of motor, the big I of load wherein calculates by the power factor (PF) size, also can connect a power-factor measurement unit separately to single-chip microcomputer.

In Fig. 2, switch is four, and wherein switch A represents " opening ", switch B represents " pass ", and switch C represents " automatically ", and switch D represents " manually ", when switch D setting oil pumper was operated in manual state, step switch A then started pumping-unit motor, and step switch B then closes motor; When switch C is located at auto state, the machine operation of oil pumper under auto state, when situation such as overcurrent, overload, under-voltage, superpressure promptly takes place, autostop, when power system recovery just often, actuating motor automatically; When electrical network produced flicker, single-chip microcomputer will judge according to the input of electric current and/or voltage signal, and the random time after dead electricity is actuating motor once more.

Four switches of above-mentioned ABCD carry out different combinations, can be used as the licencing key input to switching manipulation, for example import AABDD, and AA wherein represents the A switch by secondary, and the rest may be inferred by analogy; On the other hand, the order that switch is pressed and the various combination of number of times, can be used for revising the isoparametric set point of data storage (EEPROM) overvoltage, also can be used for the trend of update routine etc., for the correction to controlled function in this controller in the future creates conditions, also create conditions for its function expansion.Except providing known power circuit 50, also connect several light-emitting diodes 501 among Fig. 3, the control end 502 of the triode that light-emitting diode connected is connected to single-chip microcomputer 201, and these light-emitting diodes are used to indicate the different operating state of four switches.

Optimum embodiment of the present invention has the following advantages:

Adopt single-chip microcomputer to calculate and control, multiple functional, protective value is many, and energy savings prolongs electrical machinery life, can further install distant control function additional.

Adopt integrated circuit to establish ten, cooperate Hall switch, volume is reduced to 1/tens of former control cubicle, itself consumes energy to reduce to 15% of former control cubicle;

Use the Hall noncontacting switch, good operation safety;

Machine volume is little, can be directly installed in the connection box for motor, and theftproof performance is good;

Running status can be remembered, can online modification or operational factor is set;

Has encryption function;

Utilize the main contacts self-locking of contactor, reliable operation.

Claims (7)

1, a kind of intelligent controller of triphase motor in pumping unit, by supply unit, electric current and voltage check device, computing system with data computation, storage, judgement, the control system of three phase mains circuit is formed, it is characterized in that: computing system is by single-chip microcomputer, data storage, program storage is formed, two are used for open and close operations and two and are used for the direct or through port line extended chip of the switch of control mode state setting and are connected with the single-chip microcomputer of above-mentioned computing system, and above-mentioned four switches that are connected on the computing system are used to input password.

2, the intelligent controller of triphase motor in pumping unit according to claim 1 is characterized in that above-mentioned switch is a Hall switch.

3, the intelligent controller of triphase motor in pumping unit according to claim 1 is characterized in that above-mentioned computing system further comprises analog to digital converter, and analog to digital converter connects electric current and voltage device.

4, the intelligent controller of triphase motor in pumping unit according to claim 1 is characterized in that above-mentioned voltage, current sensing means are voltage, current transformer.

5, the intelligent controller of triphase motor in pumping unit according to claim 1 is characterized in that the control system of above-mentioned three phase mains circuit comprises controllable silicon or solid-state relay or A.C. contactor or AC vacuum relay or electromagnetic relay.

6, the intelligent controller of triphase motor in pumping unit according to claim 1 is characterized in that the state and the operational factor that have a data storage storage switch to set in the above-mentioned computing system.

7, the intelligent controller of triphase motor in pumping unit according to claim 6 is characterized in that above-mentioned data storage is an electricity erasable memorizer.

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