SU434505A1 - POWER REVERSOM "]" - Google Patents

Description

This invention relates to the field of electrical installation.

Known power reversors containing two fixed cores with windings and movable measles with bridging contacts.

The purpose of the invention is to improve the reliability and speed of power reverse.

For this, the fixed cores are made with gaps and are located opposite one another, each of the cores having two clamps for holding and transferring the core placed between the cores and made in the form of a two-way bridge contact of conductive material surrounded on both sides by plates of ferromagnetic material.

FIG. 1 shows the proposed reverser; in fig. 2 - the same, schematic diagram; in fig. 3 - bilateral bridge contact-measles.

The proposed reverser consists of fixed cores 1 and 2 with gaps a and b, holding coils 3, 4, connected in series and constantly under current during the operation of the reverser, pulse coils 5 and 6, each connected to its source 7, 8 pulsed current, and a movable bridge kontayuga-cor 9.

The bridge moving contact bore is made of a conductive material 10 surrounded on both sides by plates 11 of a ferromagnetic material.

The proposed reverser works as follows. When the current flows through the holding coils 3 and 4, the pin 9 will be held in the polarization in which it was at the time of switching on the current. With

By this, the contact pressing of the contact-box 9 on the current-carrying busbars, for example, 12, 13 is provided by the passage of the magnetic flux F2 through the core 2 and the contact-plate 11 of the contact-box. In this case, the magnetic flux

The passage through the fixed core 1 will be much weaker than the flux Fg passing through the fixed core 2, in view of the fact that the flow F must additionally overcome two air gaps separating the fixed core 1 from the contact-core (at a given position of the contact-core) .

Thus, there will always be more magnetic flux of the core to which

at the moment the contact is closer, despite the equality of the ampere-turns of the holding coils 3 and 5.

Switching the contact-reverser box from the position in which it closes the current-carrying buses 12 and 13 to the position corresponding to the closure of the tires 14 and 13 is performed by applying a pulsed current I to the pulsed coil 5 from the source 7 I. At the same time, the ampere-turns of coil 5 significantly outperform the amner turns of the holding coils. In this case, the flux Fz (from the coil 5), passing through the gap a and the gap between the core 1 and the contact, core 9 will weaken or nullify the flux Fg from the retaining cord 4. As a result of the gap b in the core 2, the flux Fz from the coil 5 basically, it will close through the contact, which ensures the transfer of the contact of the core to the core 1, the opening of the tires 12 and 13, and the closure of the tires 14 and 13. After the current pulse has passed, the contact will be kept in a new stable state from the holding coil 3. Thus switch Rev. are produced under variable feed current pulses in the pulse coil 5 and 6, and retention reverser in any of the two stable states using the permanently connected to a constant current source, holding the coils 3 and 4.

The design of the contact-core, which is the only moving part of the proposed reverser, minimizes the kinematic part of the reverser and repeatedly increases its speed.

Subject invention

A power reverser, for example, for switching the output poles of the thyristor converter when the latter is locked, containing two fixed cores with windings and movable measles with bridge contacts, characterized in that, in order to increase the reliability of the device and its speed, the fixed cores are made with gaps and are located opposite one another, each

the cores have two windings for holding and transferring the core placed between the cores and made in the form of a two-way bridge contact made of conductive material surrounded on both sides

plates of ferromagnetic material.

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