Device of high-power communication frequency conversion is in the application on aircrew of finish rolling of announce steel tall wire

5 one φ 6.

Omm main steel plants: The product precision such as general carbon steel, high grade carbon steel, low-alloy steel: φ 5.

5 ～ φ 6.

0mm person 0.

15mm φ 10.

5 ～ φ 16.

Omm person 0.

80% what 20mm ovality is not more than dimension total deviation. Rolling speed: Finish rolling machine is highest design career 113m/s, assure speed 85m/s (φ 5.

5mm) finish rolling machine uses topcross new-style rolling mill. Craft asks the rate of electric machinery of drive of finish rolling machine is rapid, timing precision scope of tall, timing is big, want to achieve such craft requirement, using groovy dc transmission is very difficult implementation. The technical requirement to electric machinery of finish rolling drive and technical parameter ask according to craft rolling mill of essence of life advocate transmission system chose Xi Menzi the laden inverting transducer that electric company produces (LCI of the following abbreviation) the timing that deserves to move fast electric machinery with domestic large synchronism. The designing institute is below the requirement of a few technologies that to electric machinery production manufacturer raises and the parameter of a few technologies that electric machinery makes manufacturer can be achieved. 1 technology asks 1) diploid to overload demand demand electric machinery is in 1.

Condition of 1 times rated load falls to move for a long time. When equivalent inside cycle load does not exceed rated load 1.

6Pn runs 15s, time interval 15min. 2) when electric machinery vertical axis exceeds twinkling to change the transducer of requirement LCI laden inverting of reactance X"d and Xcm of reactance of every photograph inverting by Xi Menzi electric company whole set is offerred, model is SIMOVERTS, shed a system to provide the dependability requirement of inverting to brilliant brake to assure to change, door subsidiary puts forward to must satisfy X"d ≤ with the electric machinery of form a complete set of LCI on the west 13.

03% (50Hz markers value) ; Xcm=0 of reactance of every photograph inverting.

6X"d ≤ 7.

818% (50Hz markers value) and by Xi Menzi the company sends technical personnel to be checked and accept to manufacturer experiment. 3) the direction of rotation that asks to the requirement of physical characteristic and function electric machinery sees electric machinery from transmission end is a clockwise, allow retrorse dot to move; Electric machinery rotates the requirement that the moment of inertia of the component is performance of contented timing trends, its GD2 is more than 3.

5tm2; Electric machinery rotates the component can bear top rotate speed (1500r/min) 1.

Of 2 times over- fast moving 2min, and do not arise harmful be out of shape and damage. 4) because the requirement that is isolated from to stator is LCI to the device of electric machinery power supply, considering brilliant brake the canal is changed had flowed to press reach voltaic change to lead fast impact, generation surge voltage, this value and base overlay of wave voltage photograph, make electric machinery insulation bears voltage exceeds rating, because this asks insulation of winding of electric machinery stator presses design of working voltage 6000V, press 6000V class assessment. In addition, because the metabolic rate of surge voltage is older, cause coil to circle voltage distributings each inhomogenous, the turn susceptive voltage that stands by voltage to be defeated by a person to carry especially is taller, so requirement electric machinery is divided outside strengthening right insulation, strengthen even circle an insulation. 5) synchronous to using the timing of LCI power supply to the requirement that electric machinery adopts damp winding electromotor will tell add damp winding to be able to decrease change shed angle overlap, accelerate inverting process, improve the quality that trends answers, ask this electric machinery uses structure of complete damp winding so. Run the analysis on mechanism from the synchronous motor that makes power supply of transducer of the straight flow pattern that make report, electric machinery is long-term job in two-phase electrify, the alternant job status of two-phase short circuit, electric machinery is changed two-phase is equivalent to when flowing abrupt short circuit, corresponding is to exceed twinkling to change reactance, increase damp winding to be meant change quickly shed a process, improve dynamic quality of the system. 6) the requirement that power supply of echelon wave electricity designs to electric machinery structure outputs those form to be echelon wave as a result of the electric current of LCI, divide in electromotor base still exist outside wave a series of strange second harmonic is bigger to electric machinery influence, make electric machinery produces oscillatory, noise and additional loss, because structure of this electric machinery designs a requirement,use double winding and stagger each other on stator space 30 ° are electric horn. Be opposite every namely extremely 6 photographs of the three-phase semmetry winding from before take the armature appearance below instead is taken 12 times, every dimensional space that takes turns into by 60 ° electric horn of 30 ° space, can make so 5, 7, 17, 19 times harmonic offsets each other, what overcome torsion of electric machinery electromagnetism effectively is pulsatile, make electric machinery efficiency rises greatly. 7) want electric machinery to be in steel rolling process to what change of axial of rotor of the electric machinery in steel rolling process moves, hard to avoid can produce axial thrust, when requirement electric machinery is designed, adopt be on guard accordingly measure. To this electric machinery requirement: It is gold having tungsten is irrigated in bearing end panel and leave oil storage chamfer has damp effect to the thrust of generation, the 2 clearance that are plain bearing liner and axial shoulder make sure axial change moves rotor to be more than person 2mm. 8) be restricted to the requirement of electric machinery over all dimension as a result of craft position dimension, center of main shaft of requirement electric machinery cannot exceed 920mm to stator coping, the design asks to be designed by 900mm, the over all dimension of electric machinery is long 4160mm, wide 2730mm, tall 1800mm, gross weight 30t. 9) it is to the requirement electric machinery of electric machinery temperature when rated load <80k; 1.

105k of the ≤ when 1 times rated load, the requirement is in mouth of water of a place with a draught of electric machinery stator, bearing, pass in and out, pass in and out all is buried 3 lines make PT100 detecting element. Among them stator 12 (every photograph two) water of wind of two bearing, pass in and out, pass in and out each one. Parameter of technology of electric machinery of 2 technologies parameter is as follows: Electric machinery model: BPT5000-4 rated power: 5000kW extremely several: 4 extremely photograph number: 6 (double Y moves 30 ° ) rated rotate speed: Frequency of job of 1500r/min of 1000r/min top rotate speed: 33.

3Hz (1000r/min) 50Hz (1500r/min) rated voltage: 2250V (1000r/min) 2300V (1500r/min) rated electric current: 708.

8A (1000r/min) 714.

2A (1500r/min) excitation means: Have brush excitation excitation voltage: 54.

6V (1000r/min) 50.

2V (1500r/min) excitation electric current: 313.

9A (1000r/min) 288.

9A (1500r/min) 1.

Voltage of the excitation when 6PN: 81.

2V (1000r/min) 75.

5V (1500r/min) 1.

Electric current of the excitation when 6PN: 467.

3A (1000r/min) 434.

2A (1500r/min) 1.

Electric current of the stator when 6PN: 1153.

8A (1000r/min) 1145A (1500r/min) defend grade: IP54 (IP23 of collector ring part) cooling method: ICW37A86 installs means: The working principle of device of frequency control of high-power of word of IM1001 total number and its hardware deploy aircraft of finish rolling of tall wire of steel of announce of 1 job principle advocate transmission used German Xi Menzi the LCI of electric company controls a system, advocate electric machinery used electric machinery of homebred large and synchronous timing, because synchronous electromotor can arise when rotate,turn over tube current of brake of electromotive force He Jing transducer to cooperate to use, inverter does not need to force to change shed unit, this kind of system is accordingly simple, can accomplish photograph of high capacity, high rotate speed, price to control a system than using IGBT3 n covering from Ximen Ziquan in introducing LCI, the brilliant brake of power unit commutator is in charge of the alternating voltage commutation that uses power source, the brilliant brake canal of inverter uses stator of laden and synchronous electromotor to turn over electromotive force inverting. LCI outputs voltaic amplitude to be controlled by inverter by the frequency of electric current of rectifier control, output. Use constant magnetism below in rated rotate speed pressure regulating frequency modulation timing, timing of frequency modulation of constant voltage weak magnetism is used in above of rated rotate speed. Just start in synchronous electric machinery, its rotate speed under rated rotate speed 10% when, because electromotor opposes electromotive force lesser, the laden commutation that causes inverter cannot work normally, right now need leans intermittent bridge of commutate of inverting circuit control takes person inversion position, rise when electromotor rotate speed to exceed rated rotate speed 10% when, automatic excision is intermittent inverting circuit turns for laden inverting. The control means of rectifier introduces speed annulus and voltaic link, similar dc drive. The control means of inverter uses vector to control a technology. Electric current is reached through voltage of synchronous electromotor stator in the inverter when electric machinery moves normally real value will decide rotate speed is worth actually, when rotate speed of synchronous electric machinery under rated rotate speed 10% when use pulse generator to offer additional rotate speed is worth actually. 2 hardware comprise Xi Menzi the device of SIMOVERTS high-power frequency conversion of electric company is comprised by following and main facility. 1) rectification transformer nominal capacity: Voltage of former edge of 7200kV · A: Voltage of LOkV deputy edge: 2 × 2.

5kV frequency: Means of 50Hz tie line: Dd0/Dy11 impedance voltage: Ud=10%2) model of frequency conversion device: SIMOVERTS65B1 inputs voltage: Voltage of rated output of 2 × 2500V: Electric current of rated output of 2 × 2300V: 2 × 792A (when 110% load move) electric current of the biggest output: 2 × 1152A (160% laden 15s, removed 15min) efficiency: 99% output frequency: Reactor of dc of 0 ～ 100Hz: Rated voltage 2 × 3000V (DC) inductance of 2 × 1000A is worth rated electric current: Ability of overload of 2 × 7mh: Dry type of 115% long-term 160%60s, belt is core, indoor from cold 3) excitation device outputs voltage 54.

6V, export electricity 313.

9A electric machinery 1.

Voltage is outputted when 6 times overload 81.

2V, export electricity 467.

3A. 4) automation of automation control refus controls unit to use word of SIMADYND total number to control a system inside ark, it is the system of much personal computer of a kind of OK and free configuration, it is the core component of system of control of frequency conversion unit, all sorts of high speed that realize power unit and excitation unit through it leave / closed-loop control, operation, detect, surveillant, call the police reach diagnose wait for a function. Its are all the function all comes true by the control software that is based on graphical configuration, undertake by functional classification by each personal computer real time is handled, control sampling time is less than Lms. Between each personal computer and communication bus line all is reached to undertake data of in-house high speed corresponds through local bus line between personal computer and other control plate. From control unit sparks unitly to power reach detect signal uses photoelectricity coupling technology, use optical fibre cable and photoelectricity changeover parts of an apparatus to undertake transmission namely. 5) application software of application software SIMOVERTS by Xi Menzi electric company is offerred. Basically surveillant, logistic control, operator control, communication control, closed-loop control and vector control wait for software function bag, bag of every software function all realizes regular system to control a function. A few problems that should note in engineering design (1) device of finish rolling frequency control is an in numerous equipment equipment on make friends line after all, the interface of news report of output losing a person of transducer must join go in whole automation system, such ability realize the cooperative control of line of whole make friends. (2) the dc reactor of LCI volume is huge, the installation inside ark, need is ventilated, the requirement builds a foundation to go up to have the opening of 1000 × 720mm in earth, secure reactor in channel of the erect on aperture next. The equipment that spot construction discovers Xi Menzi, data and plant design time do not join to go up, cause do poorly done work over again, answer when congener henceforth project is designed bring to sb's attention. A few proposal (1) electric machinery of synchronism of finish rolling machine is used from Lv of safeguarded angle take an examination without brush excitation. The electromotor of synchronism of machine of tall line finish rolling that introduces from abroad at present is to not have entirely brush excitation, just be the branch that rotor has protruding pole type and non-salient pole type. Do not have namely without the advantage that brushs excitation brush, need not check carbon brush and change carbon brush, reduced equipment malfunction point. According to investigation, at present manufactory of 3 big electric machinery of domestic all can be produced without brush excitation synchronism electromotor, and successful application is on power industry. (2) proposal of device of LCI frequency conversion is homebred change, component of LCI includes ark of rectification transformer, commutate, reactor ark, excitation ark to be able to use homebred component completely to assemble, its automation controls the 〕 of core component SIMADYNI of ark to be introduced from abroad, such but managing one-time investment 50% one 60% . CNC Milling