SU92811A1 - Power Winder - Google Patents

Description

The subject of the invention is an electric winder for controlling the belt tension in cold rolling mills based on maintaining the stability of the electric motor of the winder while simultaneously affecting the current and magnetic flux and the subsequent Heio. These actuators have a relatively complex circuit.

According to the invention the drive is accomplished sunaestvennoe uiropdenie circuit due to the fact that for varying the voltage on the bark of the engine when powered ioslednego from the main drive of the generator is applied trehobmotochiyp 1yultodobavochnyn eperator with counter nanravleniem magnetic fluxes seriesioy winding and winding independent excitation and c) otnvleniem self-excitation winding above the critical value. The generator operates in the mode of “compliant start” and feeds the additional excitation winding of the motor of the winder.

The drawing shows a schematic of the electrical circuit of the described electric drive.

Engine / main drive of the rolls,; powered by a generator.;. From the same generator, it gets power and engine - / winder. To change the voltage on the engine bark 4, regardless of the main generator power supply. an auxiliary generator / is used, connected in series to the dvpgatel 4 circuit. Generator 6 is a three-winding} of a small low-voltage motor with a winding resistance of 7 self-excitation more critical. The winding of the independent 6 excitation creates the field of the auxiliary generator 6, which is consistent with the zero of the generator- :). Serial winding 9 always resists winding iS. Under the action of the winding. the generator / can change its polarity, i.e. it operates in the mode of “coordinated meeting, including and. The motor 4 of the winder has D1, ve winding and 1i) exciter, of which the winding 70 is powered from a source of unchanged papril. and winding 11 is from an auxiliary generator (i.

The control is carried out according to the "generator-motor" system by diminishing the excitation winding of the 1-generator with a rheostat /:

(o6i) 4iio With servo-driven drive), at the beginning of rolling, when the auxiliary generator O has a polarity that agrees with the generator —l ppm. winding / 7 counteracts m. d. winding / Oh, and the maximum m. D. s. winding 7 / will be me npe p. m. winding / Oh. During rolling, under the action of the winding 9, e. d. geyora, torus 6 decreases, reaches n} l, then changes the polarity and increases again. already counter to e. d. generator I. At the same time, ppm with. the windings // are composed with ppm with. windings70. Thus, in terms of the degree of voltage of the engine core 4, the current of the core and the magnetic flux of this engine increased. Selecting the appropriate way md d. the windings of the engine 4 and the geerator 6, it is possible to obtain an almost unmetered power of the engine winder, which will ensure a constant of 1 atom of 11 rolls / rl.

In the commonly used mite tension control schemes, one of the two O2 parameters (the core current or the magnetic current of the winder motor) remains constant, while the other grows as the tape winds around the drum winder. In the proposed system, in the process of irokatki and there is an increase in both parameters. The setpoint of tension and the nature of the change of parameters can be regulated by co-motions 7and, 76, 77 and in chains.

Excitation windings of machines 6 and 4. For the case of a reversible stack, windings 77 and 7.9 are included in reversing circuits. The generator 6 is used when the engine is pushed to drive the winder in both directions, for which the winding 6 is also included in the reversing circuit. The generator 6 operates on the straight-line portion of the idle characteristic. During an emergency fallout of the core system, the limitation of the load is achieved by the realization of machines1) r,

1 weekly essay

The electric drive of the winder to regulate the tension of the tape in the cold rolling mill mills, based on maintaining the power of the electric motor of the winder, at the same time affecting the current and the machine and the last and last, nl. and with that, in order to uirop1eii drive circuit for changing the voltage on the motor cortex when powering the latter from the main drive reiie | iaTOpa, applied T1) motor winding booster generator with the opposite direction of the magnetic currents of the serial winding and winding independent excitation and with the resistance of the self-excitation winding of the critical, operating in the mode of "according to the switching on and imitations, the additional excitation winding of the winder motor.