浅析步进电机的PLC控制技术与发展趋势学位论文外文.docx
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1、The shallow treads into the PLC control technique and development trend of electrical engineering 1. Say all: Along with the micro-electronics technique and the calculator technical hair Exhibition, the programmable preface controller has an advance by leaps and bounds of hair Exhibition, its functi
2、on has already outrun a logic control far and far, in proper order The scope of control, it has an effect to combine with calculator, can enter Go to imitate to control most, have along range correspondence function etc. Have-The person is called it the modern D industry controls of three pay pillar
3、 greatly(namely PLC, robot, CAD/CAM)it a, currently programmable controller BE applied in metallurgy extensively, Mineral industry, machine, light Class D realm, automate for the industry Provided to there is the tool of one dint The PLC controls of tread to open the wreath servo organization into t
4、he electrical engineering should Used for combining tool machine to produce an on-line number to control a slippery pedestal to control automatically Make, can the province go to the number of that unit to control system, making that unit The cost of controlling the system lowers. 2、What is a steppe
5、r motor: Stepper motor is a kind of electrical pulses into angular displacement of the implementing agency. Popular little lesson: When the driver receives a step pulse signal, it will drive a stepper motor to set the direction of rotation at a fixed angle (and the step angle). You can control the n
6、umber of pulses to control the angular displacement, so as to achieve accurate positioning purposes; the same time you can control the pulse frequency to control the motor rotation speed and acceleration, to achieve speed control purposes. What kinds of stepper motor sub-:In three stepper motors: pe
7、rmanent magnet (PM), reactive (VR) and hybrid (HB) permanent magnet stepper usually two-phase, torque, and smaller, step angle of 7.5 degrees or the general 15 degrees; reaction step is generally three-phase, can achieve high torque output, step angle of 1.5 degrees is generally, but the noise and v
8、ibration are large. 80 countries in Europe and America have been eliminated; hybrid stepper is a mix of permanent magnet and reactive advantages. It consists of two phases and the five-phase: two-phase step angle of 1.8 degrees while the general five-phase step angle of 0.72 degrees generally. The m
9、ost widely used Stepper Motor. What is to keep the torque (HOLDING TORQUE) 3、Tread into the basic characteristics of electrical engineering: (1)、tread generally into the accuracy of the electrical engineering for tread into Cape of 3-5% and dont accumulate. (2)、tallest temperatures which enter elect
10、rical engineering outward appearance and allow tread and lead into the electrical engineering temperature high can make the magnetism material of electrical engineering back first, cause the dint descend thus is as for lose a step, so the electrical engineering outward appearance allow of the talles
11、t temperature should be decided by small back with electrical engineering magnetism material and order; Speak generally, the magnetism material backs to order all above have in 130 C an of even be up to 200C above, so tread completely normal into the electrical engineering outward appearance tempera
12、ture in 80-90C. (3)、dints which enter electrical engineering would with turn to go up but descend soon,While treading to turn to move into the electrical engineering, electrical engineering each electricity feeling which round a set mutually will become one anti- to electromotive force; The frequenc
13、y is more high, anti- to electromotive force more big ,big in its function, the electrical engineering enlarges with the frequency(or speed) but mutually the electric current let up, causing the dint descend thus. (4)、 can revolve normally when 4 enter electrical engineering low speed, but if high i
14、n certain the speed cant start, and the companion have a roar the interjection tread to have a technique parameter into the electrical engineering: empty carry start frequency, then tread into electrical engineering at empty carry under circumstance can start normally of pulse frequency, if the puls
15、e frequency is high in should be worth., The electrical engineering cant start normally, the possible occurrence throws a step or blocks up to turn. Under the situation that there is one load, the start frequency should be much lower if want to make the electrical engineering attain high speed to tu
16、rn to move, the pulse frequency should have an acceleration process, then start the frequency is lower, then press certain acceleration to rise the high hoped. Tread to show the characteristics of with it into the electric motor, turn ages of manufacturing to develop important use to accompany with
17、in the numeral small together of numeral turn technical of development and tread into the electrical engineering technical exaltation,tread will get an application in more realms into the electrical engineering. 4、enter an electrical engineering control system to constitute: Tread is a kind of perfo
18、rmance organization that will give or get an electric shock a pulse conversion to move for the Cape into the electrical engineering. When tread to receive to a pulse signal into the actuator, it drives a step to press the direction of enactment to turn to move an angle for fixing to be called tread
19、to be apart from Cape into the electrical engineering, it revolves one-step circulate with the fixed angle one step. Can pass control pulse piece to control a Cape to move to attain the purpose of assurance most and thus; Can pass control pulse frequency to control electrical engineering to become d
20、ynamic speed and acceleration in the meantime, the purpose attained to adjust thus soon treads into the electrical engineering. Can be the special kind electrical engineering that a kind of control uses, make use of it didnt accumulate error margin accuracy to 100 to divide 100 of characteristics, b
21、e suffused with to apply in various open a wreath control PLC which enter electrical engineering technique. 5、Stepper motor of the PLC control technology:Make the importation tread to be subjected to a homologous control into total amount and pulse frequency of the importation pulse of electrical en
22、gineering. Establish the pulse signal occurrence that a pulse total amount and pulse frequency can control a machine therefore and in control,software; Can make use of PL in fixed time a machine composing for the frequency lower control pulse, the pulse frequency can pass in fixed time machine in fi
23、xed time constant control pulse period, the pulse amounts control then can establish a the pulse counter C10 be when the pulse number attain initial value, count machine C1.The action cuts off pulse back track, making it stop, the servo organization tread into the electrical engineering have no the
24、pulse input then stop operation,servo performance organization fixed position be servo performance organization of when move speed to have higher request, can use PLC high-speed pulse,Different PLC it the frequency of high-speed pulse can reach to 4000-6000Hzses. The PLC is used to produce control p
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