Parameter of Xi Menzi transducer sets a means

M)n -- rotate speed (laden and phyletic cardinal principle can divide the relation basis of T of R/ Min) torsion and rotate speed N it is 3 kinds. (1) although the constant torsion that rate change torsion also changes not quite is laden, this kind of load is like conveyer belt, crane, extruder, compressor to wait. (2) as rotate speed reduce, torsion presses the load that the square of rotate speed reduces. This kind of load is like all sorts of fan, liquid pump to wait. (The control way that 3) transducer offers has V/f control, vector control, pitching moment control. There is characteristic V/f of linear V/f control, parabola to control in V/f control. Set transducer parameter P1300 for 0, transducer job controls fashion at linear V/f, will make the magnetic flux when timing and excitation electric current basic and constant. Apply to working rotate speed to be absent low frequency paragraph object of timing of general constant torsion. Set P1300 for 2, transducer job controls fashion at parabola character V/f, this kind of means applies to fan, water pump kind laden. Of similar ground of this kind of laden axial power N and rotate speed N just become direct ratio 3 times. The square of similar ground of its torsion M and rotate speed N becomes direct ratio. Laden to this kind, if the V/f character of transducer is linear relation Www.

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Cn, criterion of the electric machinery when low speed allowable torsion is ambitious at laden torsion, drop badly what cause power factor and efficiency thereby. All rights reserved to get used to this kind of laden need to control project network, make voltage is reduced as what output frequency with square the relation is reduced, reduce the magnetic flux of electric machinery and excitation electric current thereby, make power factor maintains inside proper limits. Can make through setting parameter V/f controls a curve to suit load performance further. Be in P1312 0 to 250 between the value with appropriate setting, have starting promotion function. Make the output voltage when low frequency what rise appropriately to be caused in order to compensate in resistor of the stator when low frequency press at linear V/f curve relatively fall the problem that causes electric machinery torsion to reduce. Apply to the timing object of big starting torsion. When transducer V/f dominates means drive electric machinery, in certain frequency paragraph, the electric current of electric machinery, rotate speed can produce vibration, serious when the system cannot move, voltaic protection has appeared in accelerating a process even, make electric machinery cannot be started normally, carry gently in electric machinery or when torsion inertia is lesser more serious. Can nod according to the frequency of systematic occurrence oscillation, on V/f curve the setting jumps turn dot and jump turn frequency band width, can jump over these frequency automatically when electric machinery is quickened paragraph, make sure the system can move normally. Come from P1091 P1094 is OK set differs 4 times jump turn dot, setting P1101 jumps certainly turn frequency band width. Some load need electric machinery to offer specific torsion below specific frequency, with programmable V/f control correspondence installs transducer parameter to be able to get what needing to control a curve. Setting P1320, P1322, P1324 decides programmable V/f. Characteristic frequency coordinate, corresponding P1321, P1323, P1325 is coordinate of programmable V/f characteristic voltage. Parameter P1300 setting is 20, transducer works to be controlled at vector. This kind of control is relatively perfect, timing range is wide, quadrature of the motivation since low speed limits is tall, precision is as high as 0.

01% , answer very fast, high accuracy timing uses Svpwm vector to control fashion. Parameter P1300 setting is 22, transducer works to be controlled at vector torsion. Means of this kind of control is current the most advanced control means on international, other way is the parameter of imitate dc motive, undertake horn alternates protecting and undertake modulatory pilot, vector torsion control is to take AC motor parameter to undertake controlling directly, control is simple, definition is high. Debug quickly before using transducer drive electric machinery, must undertake be debugginged quickly. Parameter P0010 is set for 1, P3900 is set for 1, transducer undertakes be debugginged quickly, debug quickly after finishing, undertook the computational Www of necessary electromotor data.

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Cn, and the default that other all parameter restore them sets a value. Below vector or torsion control means, to realize control correctly, very important is, must input the data of electromotor correctly to transducer, and, of electromotor data detect automatically parameter P1910 must undertake when electromotor is in normal temperature. Should make can this one function (when P1910 =1) , can produce A0541 of an alarm signal, give a warning, when giving out On to command then ConTROL ENGINEERING China alls rights reserved, what begin electromotor parameter instantly is automatic detect. Add slowdown time to adjust quicken time to output frequency namely from 0 rise to place of the biggest frequency to need time, slowdown time is to point to drop to need time to 0 from the biggest frequency. Those who quicken time and slowdown time choice is reasonable was opposite of electric machinery start, stop to run those who reach timing system to answer speed to have major effect. The tie that quickens time setting is electric current limitation has been in inside voltaic limits, should not make pass voltaic protector act. Electric machinery is during decelerate movement, transducer will be in second birth to generate electricity condition of apply the brake. The mechanical energy changeover that stores in transmission system is electric energy and pass on electric energy dc side through inverter. The electric energy that pass on will cause intermediate return store can capacitor two upright voltage rise. Accordingly, the tie that slowdown time installs is to prevent dc loop voltage exorbitant. Add formula of slowdown time computation to be: ? Uranous Ji goes straight towards?ta=(jm+jl)n/9.

56(tma-tl) slowdown time: TB=(jm+jl)n/9.

In 56(tmb-tl) type: The inertia Jl of one electric machinery of Jm, laden inertia N, Tma of rated rotate speed, Tmb of torsion of electric machinery drive, Tl of torsion of electric machinery apply the brake, laden torsion increases slowdown time but according to formulary numerate, method of usable also and simple and easy experiment undertakes installing. Above all, make procrastinate move a system to move with rated rotate speed (labour frequency runs) , next dump, make procrastinate move a system to be in Www of condition of free apply the brake.

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Cn, with stopwatch computation its rotate speed drops to quit the time of a need from rated rotate speed. The 1/2~1/3 that adds slowdown time to be able to press time of free apply the brake above all undertakes beforehand buy. Through rising, observation of power cut motive has had not had electric current, overvoltage to call the police, adjust increase cost of slowdown time set, call the police with happening in movement for the principle, duplicate an operation a few times, can decide truly optimal increase slowdown time. Moment of inertia installs the setting of electric machinery and laden moment of inertia to often be ignored, think the proper setting that increases slowdown time can make sure the system works normally. Actually, moment of inertia installs undeserved meeting to make systematic oscillation, timing precision also can be affected. Moment of inertia is formulary: J=t/d ω / the acquisition of Dt electric machinery and laden moment of inertia the method is same, let transducer job frequency be in appropriate value, 5 ～ 10hz. Let electric machinery sky carries and take carry to go respectively, numerate the starting time of parameter R0333 rated torsion and R0345 electromotor, become conversion of transducer job frequency corresponding angular velocity again, era enters formula, computation reachs electric machinery and laden moment of inertia. The inertia that installs parameter P0341(motor) as total as parameter P0342(actuating device inertia) CNC Milling