KR20020002184A - surge and noise multiple shelter power supply - Google Patents

Abstract

PURPOSE: A power supply with multi-shielding circuit of surge and noise is provided to shield surge and noise from AC line and earth and to prevent surge and noise generated from communication equipment itself from transferring outer equipment. CONSTITUTION: A power supply with multi-shielding circuit of surge and noise is mounted before a DC power supply in such a manner that a first coil(T1) of the transformer is serially connected to an AC line and a second coil(T2) is connected to the DC power supply so as to supply power while shielding surge or noise. When surge or noise is introduced into the transformer, an addresser applied to the first section of the transformer discharges surge exceeding internal voltage of the address to ground through earth. Also discharged is surge passing the address through earth(SG) by multi-shielding of the transformer.

Description

Surge and noise multiple shelter power supply

This product has a surge signal attenuation transition rate of 1 / 10,00 or more as a surge protection function to shield multiple surges and noises coming from the power line or the ground mainly using a transformer, and has a low voltage circuit, equipment, and load equipment. It protects the internal circuits and has a structure to prevent accidents of other devices and human body according to the low potential of the case.

1. Description of operation

This product has a surge and noise shielding function, but it is installed mainly in the front of the power supply or other equipment that needs AC power by using a transformer to shield the surge and noise while supplying power.

On the primary side of the transformer, surge arresters SA1, SA2, and SA3 are attached in parallel to discharge the surge current to the ground along the path of a when surges above the reference voltage of the surge arrester are introduced. Then, the potential of IG rises and is discharged in the path of b-> d, and a small amount of surge and noise leaving this shield discharges along the path of c-> e. In addition, surges and noise introduced through ground shield the paths of surges and noise on the primary and secondary sides of the transformer due to the transformer's multiple shielded insulation.

2. Surge and noise blocking structure

Mainly a transformer, this product is equipped with an arrester and a condenser and stored in an enclosure.The rated primary voltage is AC 110V, 220V, 380V, 440V (50 / 60Hz), and the rated secondary voltage is AC 110V, 220V. It has a transformer ratio of 380V, 440V (50 / 60Hz), and has a multi-stage shielding function when surges or noise penetrates, i.e., when a voltage above the reference voltage flows or when a high frequency signal flows.

2.1 grounding structure

end. IG ground: A shield plate to shield the primary winding. It is a ground for discharging the input discharge current to the ground, and has high potential during operation. Earth resistance should be less than 30Ω.

I. SG grounding: Connected to transformer core and main body enclosure to prevent potential rise of enclosure and discharge surge through primary shielding to earth. Install at the position close to load facility and ground resistance should be below 100Ω.

All. LG ground: This is a shield plate to shield the secondary winding, and it is a ground to discharge the surge passing through the primary and secondary shields to the ground, or it can be installed near the load facility or as the SG ground and common ground. Earth resistance should be less than 100Ω.

2.2 Multiple Shielded Transformer Structure

Before winding the primary coil, shield the inside and outside with nomax (class H) insulating paper and shield with a shield plate to form IG ground. After winding the coil, shield it with a copper plate. Secondary coil is configured with LG ground in the same way, then insulated with insulating paper in the middle of the primary and secondary sides, then shielded to form SG ground.

Iron cores used in transformers are cut to I-core type and assembled in E-core type, without using existing cores to improve efficiency and light weight. At this time, the efficiency becomes better only by increasing the bonding, so the cut core is closely attached to the band, and then the coil wrapped with insulation paper is inserted again. Thus, efficiency and weight can be reduced.

After this configuration, as a method for improving efficiency and reducing noise in the transformer, it is dipped in a curing agent and dried at 120 ° C. for 5 hours.

2.3 Surge and noise that can be shielded as a multi-stage shielding structure

The multi-shielding surges, mainly transformers, shield the surges and noises that enter through the power lines and reverse through the ground terminals, and the surges and noises that may damage other facilities by multiple insulations and shields.

Surge through AC power line or lightning rod flows into ground, and surge and noise from nearby equipment can damage other equipment through power line or ground. This is to prevent damage to the equipment or to prevent malfunction.

There are many existing surge protection products, but there are also existing products that use transformers, the main body of this product. However, these products not only have a small amount of surge attenuation but also do not have multiple shielding structures, so the surge shielding function is weak. Some of the surges flowing along the power line are discharged to the ground, but a large amount of surge affects the load facility. have. In addition, there is almost no shielding against surges introduced through ground. In addition, there is no function of filtering out noise that is a high frequency signal.

The insulation shield function of other conventional transformers has only one level of insulation between the primary and secondary sides, and the improvement of insulation function and efficiency cannot be expected by using an evaporative curing agent.

In order to prevent the malfunction of the transmission / broadcasting equipment or to prevent malfunctions, it is necessary to shield the surges from the power line and ground side to a satisfactory level, and to filter the noise to ensure stable operation of the equipment. Technical development of the product.

If the surge flowing from the AC line is greater than the SA breakdown voltage, the current is discharged to the ground along the path of a through the SA. Then the potential of IG rises and discharges through the path b-> d through the capacitance between the shield plates. In addition, through the capacitance between the shield plate in the next stage to discharge to the ground along the path of c-> e.

The surge shielding and noise filtering of the transformer are implemented.

The first is to implement a multi-stage insulation shield to completely shield surges with arresters and capacitors connected in parallel.

The second power line is a low frequency signal of 60Hz and always enters the primary side of the transformer so that the rated primary voltage is AC 110V, 220V, 380V, 440V (50 / 60Hz) Make sure the voltage has a transformer ratio of AC 110V, 220V, 380V, 440V (50 / 60Hz).

Third, when a high frequency signal is introduced from a power line or ground, the high frequency signal is blocked according to a resonance phenomenon which is determined by an inductor and a capacitor value.

By developing this product, domestic companies that have used imported products or used below-expected surge shielding products have experienced surge shielding function and noise filtering function that are sure to perform. It can prevent problems, solve problems caused by malfunctions, and bring import substitution effect.

Claims (2)

Single Phase Surge Voltage Application Circuit Configuration In Fig. 1, AC power is input and the rated primary voltage is AC 110V, 220V, 380V, 440V (50 / 60Hz), and the rated secondary voltage is AC 110V, 220V, 380V, 440V. On the secondary side of the transformer [FIG. 3] having a transformer ratio of (50/60 Hz), a surge voltage blocking means for supplying power to a DC power supply, detecting a surge voltage of a predetermined voltage or more, and discharging it to the earth is the first AC power line. Node N1 located on the top, Node N2 located on the second alternating current power line, a first shield between the first and second nodes and blocking surge voltage and noise, located between the second and third nodes And a surge voltage, a second shield for blocking noise, a first shield and a third shield between the first node and a third node, and a surge voltage, a third shield for blocking noise, and a surge voltage flowing from the ground at T1 and T2, 4th car to block noise Unit, T, N4, N5, and located in the stand, which is composed of a fifth shield that blocks a switching surge and noise that comes from the load equipment and shielding circuit. In the three-phase surge voltage application circuit configuration [Fig. 2], the rated primary voltage is AC 110V, 220V, 380V, 440V (50 / 60Hz) by receiving AC power, and the rated secondary voltage is AC 110V, 220V, 380V, 440V. On the secondary side of the transformer [FIG. 3] having a transformer ratio of (50/60 Hz), a surge voltage blocking means for supplying power to a DC power supply, detecting a surge voltage of a predetermined voltage or more, and discharging it to the earth is the first AC power line. A node N1 located on the second node, a node N2 located on the second AC power line, a node N3 located on the third AC power source, a first shielding part which blocks surge voltage and noise between the first node and the second node, A second shield positioned between the second node and the third node to block surge voltage and noise, a third shield positioned between the first node and the third node to block surge voltage and noise, and a first node; Located between the fourth node and before surge And a fourth shield to block noise, located between the second node and the fourth node, and a surge voltage, a fifth shield to block noise, located between the third node and the fourth node, to block the surge voltage and noise. Located at the sixth shield, and T1, T2, the surge voltage from the ground, the seventh shield to block the noise, T, N5, N6, N7, N8, switching surge and noise from the load equipment Surge and noise shielding circuit consisting of an eighth shield to block the.