SU982175A1 - Vibrodrive - Google Patents

Description

(54) VIBRATION

one

The invention relates to electrical engineering, in particular, to motors with oscillatory motion of the core, and can be used, for example, in vibrating platforms for forming reinforced concrete products.

 A two-stroke electromagnetic exciter with bias is known, containing two windings, direct and alternating current, fed separately from a source of direct and alternating current 1.

The disadvantage of this vibration excitation is the structural complexity and difficulty of tuning into the resonant mode.

The closest to the proposed technical entity is an external drive containing a push-pull electrically driven exciter with biasing, equipped with two DC and AC windings, and a single-phase inverter with a driver for controlling pulses, connected to one of the AC windings 2.

A disadvantage of the known device is the complexity of the vibration exciter and non-,

OPPORTUNITY to regulate the amplitude of oscillations.

The purpose of the invention is to simplify the electrically vigilant external musculoskeletal system and to widen the range of its amplitude control.

This goal is achieved by the fact that the vibration actuator containing a two-stroke electromagnetic vibration exciter with anti-magnetisation, equipped with two voltages of alternating current, and a single-phase inverter with a control motor, has a 9 output output to one of the windings, the current, the current, the current circuit, the current flow, one of the current, the alternating current flow to one of the windings, the alternating current, the current flow, the current, the current, the current, the alternating current, to the one of the windings, the alternating current, to which the current flow will flow. similar to the main power, connected by the output to the second winding of an alternating current of an electromagnetic vibration exciter, and the drivers of control pulses of each inverter are equipped with blocks of change in well The effectiveness of inverter output voltages.

FIG. i will lead the vibrating drive circuit

Claims (2)

20 in FIG. 2 - temporary dns-frames of the signals at the control inputs of T1 factors of inverters, voltages and currents in the windings of the vibration tracks y-. ditel 398 The vibrodrive (Fig. 1) contains two) electrostatic electromagnetic exciter with biasing 1, with alternating current windings 2 and 3, which are powered respectively from two single-phase inverters 4 and 5. Four pairs of thyristors 6, 7, 8 and 9 inverters control & are a control system 10 consisting of a master oscillator P, four shaping pulses 12, 13, 14 and 15 and two blocks of changing the duty cycle of the output voltage of the inverter phase shifting elements 16 and 17. The power circuits of the inverters are powered from a DC source . The device operates as follows (Fig. 1). The master oscillator 11 generates a two-pole straight line rectangular shape. One period of this voltage is applied to the pulse shaper 13, the output signal (Fig. 2) of which controls the unlocking of the thyristor pair 7 of the inverter 4 (Fig. 1). The other half-period of the output voltage of the master oscillator 11 is supplied to the pulse shaper 12 through the phase-shifting element 16. The output signal and, (Fig. 2) the pulse shaper 12 (Fig. 1) controls the unlocking of a pair of thyristors 6, the unlocking time of which can be varied relation to the time of unlocking the pair of thyristors 7 by changing the magnitude of the input (control) voltage (phase shifting element). The negative half-period of the output voltage of the master oscillator 11 is also supplied to the pulse shaper: 15, and the positive one - to the ph to the globalizer of pulses 14 through the phase shifting element 17, creating a signal Uyg and U-ye (Fig. 2) respectively, controlling the thyristor pairs 9 and 8 (Fig. 1) of the inverter 5. By varying the control voltage values, the phase shifting elements 16 and 17 can be adjusted the shifts of the signals and (Fig. 2) and U g are relative to UV / TH and V9, respectively, thereby controlling the duty cycle L T / t, voltage pulses and. on the windings of the vibration exciter and the constant component H of currents i in the windings (Fig. 2), where T is the period of the voltage pulses on the winding; t is the pulse duration of positive polarity. Combining the flow of alternating and direct currents in windings 2 and 3 reduces the number of windings of the electromagnetic vibration exciter by eliminating the DC windings. Regulation of the duty cycle of the voltage pulses of the windings allows you to adjust the degree of magnetisation w, therefore, the maximum amplitude-frequency characteristic and the amplitude of oscillations of the core in the resonant mode of the electromagnetic vibration exciter. Vibrodrive, which contains a push-pull electromagnetic vibration exciter with bias, equipped with two alternating current windings, and a single-phase inverter with a driver for controlling pulses, connected to the output of one of the alternating current windings, in order to simplify the electromagnetic vibration exciter and widen the amplitude of its oscillations, an additional inverter, similar to the main one, is connected to the second winding of the alternating current lektromagnitnogo exciters and conditioners steering momenta each inverter units are equipped with varying duty cycle output voltages of inverters. Sources of information taken into account in the examination 1. USSR author's certificate number 100366, cl. H 02 K 33/14, 1950, 2. Authors certificate of the USSR M 288087, cl. G 05 B 25/00, 1970. } Oi 4U7 № AND J Vj w -. L. one ff S ( eleven 7 sh Oyi.9