SU1515275A1 - Reciprocating electric drive - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to electrical engineering, electric drives for driving piles, crushing over-sized rocks, and the like. The goal is to increase power density and reliability by smoothly returning the core. The electric drive contains two stator windings 5.6 and the main winding 3, placed in the slots of the stator magnetic cores and the core, the power source and the control circuit. The winding 5 is connected to the power source directly, the windings 3 and 6 are connected in series-according and connected to the power source through a valve and a normally closed limit switch. When the working stroke of the winding 3 and 6 are turned on, with the reverse course off. Achievement of force increase and a smooth return to the initial state are achieved. 2 Il.

Description

one

(21) 4310003 / 24-07

(22) 09/28/87

(46) 15-10.89, Bull. Number 38

(71) Kharkov Design and Engineering Department of the Ukrainian Research Geological - Prospecting Institute

(72) Yu.G.Yampolsky, V.VoVetrov, and Yu.V.Votinov

(53) 621.313.283 (088.8)

(56) US Patent No. 4529898, cl. 310-15, 1985 „

US patent No. 4404503, cl. H 02 K 33/06, 1983.

(54) ELECTRIC RETURN-POST-TOWN - BODY DISCHARGE

(57) The invention relates to electrical engineering, electric drives for driving piles, crushing of oversize. rock, etc. The goal is to increase power density and reliability by smoothly returning the core. The electric drive contains two stator windings 5, 6 and the main winding 3, stator magnet conductors and a core, power source and control circuit placed in the slots. The winding 5 is connected to the power source directly, the windings 3 and 6 are connected in series-according to and connected to the power source through the fan, the stitch and the normally closed limit switch. With the working stroke, the windings 3 and 6 are turned on, during the reverse stroke they are turned off. A force increase on the forward stroke is achieved and a smooth return to the initial state is about 2 or less.

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The invention relates to electrical engineering, electric drives for pile driving, crushing of oversize rock, and the like. .

The purpose of the invention is to increase the power density and reliability by smoothly returning the core.

Figure 1 shows the reciprocating engine, a general view; Fig. 2 is a diagram of the power supply and current control in the device windings.

The electric drive contains a magnetic conductor 1 of the stator, made of laminated steel, which is concentrically placed in the magnetic circuit 2 core. Winding 3 is placed in the groove of the magnetic core 2 of the core made of laminated steel, winding 3 of the core is limited by two pole tips of the magnetic circuit 2 - upper {1IM and lower magnetic circuit 1 of the stator is placed in the housing 4, the stator coils are top 5 and bottom 6, which are separated by a non-ferromagnetic gasket 7. The stator windings 6 and 5 are limited by the two pole tips of its magnetic core 1 - the top, one and the bottom. Pole tip at the upper end of the stator magnetic circuit 1 in the horizontal plane overlaps the pole tips of the magnetic circuit 2 core. The magnetic conductor 2 core together with its winding 3 is rigidly fixed on the external; The housing 8. At the lower end of the housing 8 is fixed ring 9 of a nonmagnetic material. The central tubular thick-walled core 10 is integrally formed with the housing 8. The core 10 is configured to move relative to the stator in bearings 11. A damping gasket 12 of elastic material is fixed on the lower annular surface of the upper polar tip of the magnetic circuit 1 1, the stator is fixed by a damping gasket 13 of resilient material and a gasket 14 of the elastic electric is fixed on the upper end surface of the stator housing 4. l-insulating material. A power coax cable 15 is connected to a 3-core coil. Two coaxial supply cables are connected in loop 16, the envelope

core 10; One of the cables is connected to the upper stator catuta 5, the second to the lower stator coil 6 A lead cable 15 is connected to the terminal box 7. The loop 16 cables are connected to the double terminal box 18o. The windings 3 and 6 are connected to each other in series and agrees, and winding 5 is opposite to them. The circuit is powered from the synchronous generator 19. One phase of the generator 19 is separated from the remaining phases and connected to the primary winding of the step-down transformer 20. The secondary winding of the transformer is connected to the upper winding 5 of the stator through a two-half-square meter. The outputs of the other two phase generator are connected to the inputs of a diode rectifying bridge 22, the outputs of which are connected to the winding 3 core and. the lower winding 6 of the stator through the thyristor 23 of the power and control system and the normally closed contact of the limit switch 24 of the lower position of the box.

In preparation for operation, the device is installed. on the pile that needs to be driven into the ground, while the measles are in the lowest position on the pile, the lower pole tips of the core and stator are offset relative to each other vertically, and the normally closed contact of the limit switch 24 is open.

The device operates as follows.

When the synchronous generator 19 is turned on, the upper stator coil 5 is energized and under the influence of the electromagnetic force of attraction that occurs between the upper pole tips of the core and the stator, the measles begin to move upwards and occupy the uppermost position, while the normally closed contact closes, but the winding 3 core and lower the stator winding 6 does not receive power due to the fact that the thyristor 23 is closed.

When a control signal is supplied from the control signal generator (not shown in FIG. 2) to the control electrode of the thyristor 23, it opens and supplies power to the winding 3 core and lower winding 6 of the stator through a rectifying bridge 22 and

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Closed contact of the limit switch 24. The direction of the current in the winding 3 core is opposite to the direction of the current in the upper winding 5 of the stator and coincides with the direction of the current in the lower winding 6 of the stator. When this occurs, the electrodynamic interaction of the magnetic flux of the poles of the core produced by the winding 3 core with the current flowing in the windings 5 and 6 of the stator and electrodynamic downward force acts on measles. Moreover, due to the opposite direction of the magnetic flux in the magnetic core 2 core and in the upper part of the magnetic circuit 1 of the stator occurs electromagnetic repulsion of the core and the stator. Under the action of electrodynamic and electromagnetic forces, the measles make a stroke down to the extreme position and, through ring 9 and the 1СНнрсит core, hit the pile, thus opening the normally closed contact of the limit switch 24 and the cycle of operation repeats,

The invention provides a force on the load with a relatively small mass of the core and a smooth return of the latter with use.

by the forces of electromagnetic attraction.

Claims (1)

Invention Formula A reciprocating electric drive containing a stator with two oppositely connected windings on the alternator magnetic circuit, measles with a winding on the omopolar magnetic circuit, located coaxially to the stator, as well as a DC power supply and control system, which is different in that power by ensuring the smooth return of the core, the stator poles and the core are made with an overlap on the side reverse, the first stator winding is placed on the side of overlapping poles and connected to the source, the second stator winding and the core winding are connected in series according to and connected to the source through the control system, which is designed as a series-connected starting valve and limit switch with normally closed contacts FIG.