RU12311U1 - HIGH-FREQUENCY COLLECTOR AND PROTECTIVE HIGH-FREQUENCY CHARGER - Google Patents

Description

HIGH-FREQUENCY COLLECTOR AND PROTECTIVE HIGH-FREQUENCY CHARGER

TexHiiKK Area

The floated model belongs to the field of electric power industry and can be used in high-frequency communication systems via wires of a power line (high-frequency link through wires of a power transmission line).

State of the art

High-frequency chokes are designed to separate industrial frequency currents and HF-OVYA8I signals transmitted through power transmission lines and contain a power reactor connected in series to the power transmission line, and a tuner and protective device connected in parallel with the power reactor, designed to ensure the protection of the charge-emitter from and pulse surges on power lines 1.

The linear current flowing through the power reactor creates a powerful alternating magnetic field that passes through the metal parts of the trap, providing its mechanical strength: rods, nuts, washers, external contact terminals of elements, etc. This leads to the heating of the metal parts of the design of the trap induced by eddy currents. An increase in the temperature of the metal parts of the tuner can lead to dangerous heating of the naztroiki electric elements located in this block and the output of the willow ejector.

Iveptno protective device of a high-frequency pickup, made in the form of a metadloocoid surge protector S3. In the metal parts of the known important device, the powerful alternating magnetic field of the power reactor also induces vortex, dangerously heating the etallocoid limiter 5, which accordingly reduces the reliability of the wagon.

The task of the field model is to increase the reliability of the trap by reducing the heating of the metal parts of the design of the tuner and the shaft device of the trap by the alternating magnetic field of the power reactor.

Field Model Disclosure

The essence of the proposal is a group of willows of two field models, one of which is intended for use in other

The object of the first utility model is a high-frequency protector containing a parallel connected power reactor, a tuner and a protective device, characterized, according to the field model, in that the metal parts of the tuner are made of metal with a relative magnetic permeability of not more than 1.5 and a specific resistance of not less than 0.3 ohm.

The subject of the second utility model is a high-frequency protector device, made in the form of a metal oxide limiter, characterized, according to the field model, in that it contains contact leads from a metal with a relative magnetic permeability of not more than 1.5 and a specific resistance of not less than 0.3 Ohms.

This allows you to reduce the heating of metal parts RYUNSTRUSCH and the unit of the three and the protective device by the alternating magnetic field of the power reactor and, accordingly, increase the reliability of the trap,

The first useful model of the group has a development that includes the fact that the tuner is formed by a capacitor and a sequential RLC-circuit, which is connected in parallel to the transenser.

This reduces the level of switching overvoltages after it is a protective device.

PribPYA Essence by the drawing of FIG.

evidence of feasibility

utility model

The high-frequency suppressor shown in FIG. 1 contains a parallel connected power reactor 1, a tuner, a protective device - a metal oxide surge suppressor 3 The tuner S is formed by a capacitor 4 and a series RLC circuit of the load resistor 5, inductor 6 and capacitor 7. Limiter 3 contains metal contact conclusions 8 and 9, conclusions 10 and 11 are designed to turn on the trap in series in the linear wire of the power line,

The trap works as follows.

- 3 of the claimed group of utility models explains; , which shows the diagram of the trap.

the high-frequency currents of the signals of the HF bundles are supported by a gagradctel, which performs the function of a notch filter. The suppressor is tuned to the operating frequency of holding it by selecting the inductance of the coil 6j of the capacitors 4 and 7 and the resistance of the resistor 5.

The overvoltage arising on the LV comes through the conclusions 10 and 11 of the trap to the reactor 1, the main device - the limiter 3 and the block S settings. The capacitor 4 of the block S is charged to the threshold voltage of the limiter 3 and the latter is triggered. In this case, the voltage at the reactor 1 and capacitor 4 decreases to a residual voltage at the limiter 3. The metal oxide limit. It has a highly non-linear current-voltage characteristic and operates almost instantly at the same threshold voltage, regardless of its rate of rise. At the same time, the level of impu.I5Ony overvoltages on the element of the trap is limited by the specified nominal value of the voltage of the limiter 3.

After tripping of limiter 3, transitional iiu .. begins.:. in elements of block 2 PG) sTTHi X;

The thread energy in the coil 6 continues to increase the voltage across the capacitor 7. However, this increase is limited, because energy ha 1; it is on the active resistance of the resistor 5.

The linear current flowing through the reactor 1 creates a powerful alternating magnetic field that passes through the metal parts of the construction of the trap, which provide its mechanical strength; rods, nuts, washers, external contact terminals, etc. This leads to heating of the metal parts of the structure by eddy currents induced in them. An increase in the temperature of the metal parts of the construction of the tuning unit S can lead to tuning due to the stored heat hazardous temperature-sensitive electrical components located in this unit and to the failure of the vagradctal.

In the proposed flooded model of the trap, the heating level is reduced due to the metal parts of the trap made of metal with a relative magnetic permeability of not more than 1.5 and a specific resistance of not less than 0.3 Ohm. This increases the reliability of the trap.

In the metal contact pins 8 and 9 of the protective device 3, a powerful alternating magnetic field of the power reactor 1 also induces eddy currents. An increase in the temperature of the contact leads of terminals 8 and 9 can lead to dangerous heating of the temperature-sensitive metal oxide cutter 11 and the corresponding reduced reliability of the trap.

In the proposed utility model of the protective device, the level of this heating is reduced due to the contact terminals of the metal-oxide limiter made of metal with a relative magnetic permeability of not more than 1.5 and a specific resistance of not less than 0.3 Ohm -A. This increases the reliability of the limiter and, accordingly, the reliability of the trap in which this limiter is used.

Industrial applicability

Comparative tests of the proposed trap with a protective device and a prototype when using the same type of power reactor for 630 A current in them showed that the prototype overheated within two hours of operation (in it, the metal parts of the building block are made of steel grade МСТ Е, а. the metal oxide surge protector has aluminum contact leads) was 60 ° C, and the overheating of the proposed trap (in it as a material for metal parts of the tuner and contact leads of the surge protector of stresses used st-al, marr: and lSxl8H9T with a relative magnetic permeability of 1D and a specific resistance of 0.8 Ohms) was

5 S.

Sources of information

1. Mikutsky onwards High-frequency traps and connection devices for high-frequency communication channels. Energoiadat, M., 1984, p. 58, fig. 218.

S, Certificate of the Russian Federation for utility model N 6484, MPKb Н04В 3/54, 1997.

- 6 Formula

Claims (3)

1. High-frequency choke containing parallel connected power reactor, tuner and protective device, characterized in that the metal parts of the tuner are made of metal with a relative magnetic permeability of not more than 1.5 and a specific resistance of not less than 0.3 Ohm • mm ² / m  2. High-frequency suppressor according to claim 1, characterized in that the tuner is formed by a capacitor and a serial RLC circuit, which is connected in parallel with the capacitor. 3. The protective device of the high-frequency trap, made in the form of a metal oxide limiter, characterized in that it contains contact leads of metal with a relative magnetic permeability of not more than 1.5 and a specific resistance of not less than 0.3 Ohm • mm ² / m.