SU1583178A1 - Electric vibration device - Google Patents

Abstract

The invention relates to a vibration technique and can be used in a vibration process machine. The purpose of the invention is to enhance the functionality by adjusting the oscillation frequency. The device consists of an electromagnet 1 with a power winding connected in series with the power thyristor 2 electrically connected to the control unit. The control unit consists of serially connected unit 3 trigger pulses, adjustable multivibrator 4, shaper voltage generator 5, comparator 6, differentiator node 7 and pulse transformer 8. 1 sludge.

Description

„“ SU ,,,, 1583178 A1

STATE NOMINATION

BY INVENTIONS AND RELATED ART OF THE GNT OF THE USSR

DESCRIPTION OF THE INVENTION

N AUTHOR'S CERTIFICATE

ALL-Union 1

BIBLISd i (21) 4444825 / 24-10 (22) 06/20/88 (46) 07/08/90. Bull. R 29 (71) Kursk Polytechnic Institute (72) S.F. Yatsun, Yu.A. Gaponov.

and V.Ya. Mishchenko (53) 534.143: 620.178.5 (088.8) (56) USSR Copyright Certificate No. 495100, class. B 06 B 1/16, 1973.

USSR copyright certificate No. 642020, cl. 06 V 1/04, 1977. '(54) ELECTRIC VIBRATION DEVICE (57) The invention relates to vibration technology and can be used in vibration technological machines. The purpose of the invention is to expand the functionality by adjusting the frequency of oscillation. The device consists of an electromagnet 1 with a power winding connected in series with a power thyristor · 2, electrically connected to the control unit. The control unit consists of a series-connected block 3 of the starting pulses, an adjustable multivibrator 4, a shaper 5 sawtooth voltage, a comparator 6, a differentiating node 7 th pulse transformer 8. 1 ill.

. 4 at the output of the waiting multivibraton low voltage level, at 1583178

The invention relates to vibration technology and can be used in vibration technological machines.

The purpose of the invention is the expansion of the functionality of the device due to the regulation of the oscillation frequency.

The drawing shows a block diagram of a device.

The device consists of an electromagnet 1, the power winding of which is connected in series with the power thyristor 2, the control electrode of the latter is electrically connected to the power thyristor operation control unit, which consists of starting pulses connected to the power supply unit 3, an adjustable multivibrator connected in series: 4, shaper 5 sawtooth voltage, comparator 6, differentiating node. 7 and pulse transformer 8.

The device operates as follows.

When the triggering pulses are connected to the network in block 3, a negative polarity pulse is generated, synchronized with the beginning of positive-polarity. half wave in the power supply of electromagnet 1. This pulse is fed to the input of the waiting multivibrator 4, the output of which appears a low level of voltage supplied to the input of the sawtooth voltage generator 5, at the output of which the voltage begins to increase. This voltage supplied to one of the inputs of the comparator 6 is compared with the reference voltage at the other input. When the value of the sawtooth voltage exceeds the value of the reference voltage, the comparator 6 is activated, a high voltage level appears at its output, which differentiates in block 7, and a positive pulse is fed to the input of a pulse transformer 8, which galvanically decouples the control circuit from the power network. Comparator 6 is triggered only once during the time, .50 until pa 4 than this time can be regulated and exceed the period of the sinusoidal voltage in the power network. At the same time, laughter pulses from the block 3 are fed to the input of the waiting multivibrator 4, they do not change its state, and as a result, the pulses opening the power thyristor 2 appear at the block output with a frequency of less than 50 Hz. Thus, by adjusting the period of the waiting multivibrator 4, it is possible to change the response frequency of the thyristor 2. The beginning of the voltage increase at the output of block 5 is synchronized with the voltage drop at the output of the waiting multivibrator 4 and, therefore, with the beginning of the positive half-wave voltage at the anode of the thyristor 2. Changing the reference voltage at the input comparator 6, it is possible to adjust the output signal delay relative to the beginning of this half-wave and, thus, to adjust the opening phase of thyristor 2, therefore, the magnitude of the electromagnet current 1. So that, it is possible to regulate the oscillation amplitude.

Claims (1)

SUMMARY OF THE INVENTION An electrovibration device comprising an electromagnet with a power winding connected in series with a power thyristor and a sawtooth voltage former, which is connected with the fact that, in order to adjust the oscillation frequency, a block connected in series triggering pulses and an adjustable multivibrator and a comparator, a differentiating node and a pulse transformer connected in series, while the input of the triggering pulse block is connected to the device power bus, output p adjust- able multivibrator is connected to an input of the ramp voltage, the output of which is connected to the comparator input and the output of the pulse transformer - to the control electrode of the power thyristor.