KR100539069B1 - Apparatus for saving consumption of electric power - Google Patents

Abstract

The present invention improves the voltage drop power factor by using a saturable reactor, and at the same time, it can save power by stably supplying the necessary power to the load side, and by using a saturable reactor, the voltage and current are varied to suppress power consumption. The power can be reduced, and the number of taps proportional to the turns ratio of the secondary coil of the saturable reactor can be set to absorb reactive power and supply only the active power to the load to reduce power consumption. Input power can be supplied directly to the load when it is inoperable, the structure is simple, and manufacturing cost can be reduced.

Description

Power saving device {APPARATUS FOR SAVING CONSUMPTION OF ELECTRIC POWER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power saving device, and more particularly, to a power saving device capable of simultaneously saving power by stably supplying power to a load side by simultaneously obtaining a voltage drop and a power factor improvement effect using a saturable reactor.

BACKGROUND ART A power saving device widely used in the related art is disclosed in Korean Patent Publication No. 0127090 (Registration Date; October 20, 1997).

The power saving device disclosed in Korean Patent Publication No. 0127090 discloses an input power source 1 connected in parallel to the primary side voltage coil 2 as shown in FIG. 1 to the middle of the primary side voltage coil 2. Configuring the primary side voltage detection control means 6 for detecting and comparing the primary side voltage through the tab 12 to monitor the variation of the input power source 1 and to monitor the amount of current flowing through the secondary side current coil 3. And a secondary side current coil voltage detection control means (7) for detecting and comparing and controlling the current coil voltage (VZ), and the primary side voltage detection control means (6) and secondary current coil voltage detection control means (7). According to the output signal, the contact terminals 27 and 28 of the switch switching means for directly supplying the input power 1 to the load 5 or connecting in series with the secondary current coil 3 of the mutual induction reactor 4 are connected. In order to cope with it according to the situation of the input power (1) and load condition It is.

By the way, the conventional power saving device configured as described above can realize the power saving characteristics of the inductive reactor, and can supply power according to the input power variation and the load variation, but as shown in FIG. ), There is a problem that the load side supply voltage (V2) is not constant and the power saving efficiency cannot be improved, and the primary side voltage coil 2 and the secondary side current coil of the mutual induction reactor 4 cannot be cut. When the leakage occurs in 3), there is a problem in that power cannot be supplied to the load 5, and at the same time, there are various problems such as a complicated structure and a reduction in manufacturing cost.

Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to improve power drop and power factor by using a saturable reactor, and at the same time, it is possible to stably supply power to a load side and save power. It is to provide a power saving device.

It is another object of the present invention to provide a power saving device capable of reducing electric energy by suppressing power consumption by varying voltage and current using a saturable reactor.

Another object of the present invention is to provide a power saving device that can reduce the power consumption by absorbing reactive power and supplying only the active power to the load by setting a plurality of taps proportional to the winding ratio of the secondary coil of the saturable reactor. have.

Still another object of the present invention is to provide a power saving device capable of supplying input power directly to a load when the saturable reactor is inoperable.

It is still another object of the present invention to provide a power saving device with a simple structure.

Another object of the present invention to provide a power saving device that can reduce the manufacturing cost.

In order to achieve the above object, the present invention invalidates an earth leakage circuit breaker that cuts off the supply of an AC input voltage when an earth leakage occurs, and a current flows through the primary side coil and the primary side coil receiving the AC input voltage inputted from the earth leakage breaker. A saturable reactor comprising a secondary coil for absorbing power and supplying only active power to the load; and 4 branched to the secondary coil of the saturable reactor to supply 5% to 20% of the AC input voltage to the load. A rotary switch for setting any one of the taps A, B, C, and D, and a switching switch for intermittently supplying the AC input voltage to the load when the saturable reactor is inoperable (when a failure occurs). And an output terminal of the rotary switch at the time of switching on the switch which is connected in series with the switching switch, and the AC input voltage And a relay that controls so as to apply directly under, and to the load characterized in that it is composed of a lamp indicating that it is applied directly to the AC input voltage.

Hereinafter, a power saving apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram showing a power saving apparatus according to an embodiment of the present invention.

As shown in FIG. 3, the power saving device according to the embodiment of the present invention includes an earth leakage circuit breaker 110 that cuts off the supply of the AC input voltage 100 when an overload, disconnection, or a short circuit occurs, and the earth leakage circuit breaker 110. The secondary coil 122 that receives the AC input voltage 100 input from the primary side coil 122 and the secondary side coil absorbs reactive power as current flows in the primary side coil 122 and supplies only active power to the load 90. Saturable reactor (120) and a secondary coil (124) of the saturable reactor (120) to supply 5 to 20% of the AC input voltage (100) to the load (90). Rotary switch 130 for setting any one of four branched taps (A, B, C, D: 5%, 10%, 15% and 20% voltage drop terminals for AC input voltage 100) When the saturable reactor 120 is inoperable (when a failure occurs), the direct supply of the AC input voltage 100 to the load 90 is interrupted. Is switched in series with the switching switch 140 and the switching switch 140, and at the same time the output terminal of the rotary switch 130 is cut off when the switching switch 140 is switched on, the AC input voltage 100 And a relay 150 for controlling the direct supply to the load 90, and a lamp 160 indicating that the AC input voltage 100 is directly applied to the load 90.

The tap A of the four stages A, B, C, and D branched to the secondary coil 124 of the saturable reactor 120 has a voltage drop of 20% with respect to the AC input voltage 100. The tap is a tap, and the tap B is a 15% drop-down tap with respect to the AC input voltage 100, the tap C is a tap with a drop of 10% with respect to the AC input voltage 100, The tap D is a 5% drop in tap with respect to the AC input voltage 100.

Next, the operation and effect of the power saving apparatus according to the embodiment of the present invention configured as described above will be described.

First, when the main switch (not shown) is switched on while the AC power line is connected to the power saving device of the present invention, the AC input voltage ( 100 is applied to the primary coil 122 of the saturable reactor 120. At this time, since the switching switch 140 is in a switching-off state and no current flows through the relay 150, the movable contact c of the relay 150 is in electrical contact with the fixed contact d. Since the movable contact (a) of the relay 150 is in an electrically non-contact state with the fixed contact (b), taps A, B, C, and four stages of the secondary coil 124 of the saturable reactor 120 are provided. D) voltage drop occurs in proportion to the turns ratio.

In other words, when the rotary switch 130 is connected to the tap A of the secondary coil 124 of the saturable reactor 120, 44 Vac (20% of the saturable reactor 120) drops. When the rotary switch 130 is connected to the tap B of the secondary coil 124 of the saturable reactor 120, 33 Vac (15% of the saturable reactor 120) drops. When the rotary switch 130 is connected to the tap C of the secondary coil 124 of the saturable reactor 120, a voltage drop of 22 Vac (10% with respect to the saturable reactor 120) decreases. When the rotary switch 130 is connected to the tap D of the secondary coil 124 of the saturable reactor 120, 11 Vac (5% of the saturable reactor 120) drops.

Therefore, when the rotary switch 130 is electrically connected to the tap A of the secondary coil 124 of the saturable reactor 120, since the voltage drop is -44 Vac, the saturable reactor 120 When subtracted from 220 Vac applied to the primary coil 122 of, 220 Vac-44 Vac = 176 Vac is applied to the load 90, and the rotary switch 130 is applied to the secondary coil of the saturable reactor 120. When electrically connected to the tap B of 124, since the voltage drop is made to -33Vac, and subtracted from 220Vac applied to the primary coil 122 of the saturable reactor 120, 220Vac-33Vac = 187Vac Is applied to the load 90 and the rotary switch 130 is electrically connected to the tap C of the secondary coil 124 of the saturable reactor 120, a voltage drop of -22 Vac occurs. Therefore, subtracting from 220Vac applied to the primary coil 122 of the saturable reactor 120 220Vac-22Vac = When 198 Vac is applied to the load 90 and the rotary switch 130 is electrically connected to the tap D of the secondary coil 124 of the saturable reactor 120, -11 Vac decreases in voltage. Therefore, when subtracted from 220Vac applied to the primary coil 122 of the saturable reactor 120, 220Vac-11Vac = 209Vac is applied to the load 90, the load according to the rated static pressure of the load 90 Since the lowest voltage that can drive 90 is applied, power consumption can be reduced.

On the other hand, when the saturable reactor 120 is inoperable (when a failure occurs), when the switching switch 140 is switched on, a current flows in the relay 150, so that the movable contact of the relay 150 c) is separated from the fixed contact (d), the movable contact (a) of the relay 150 is in electrical contact with the fixed contact (b), so that one side of the AC input voltage (100) is the earth leakage breaker ( 110, the connection 150 is connected to one side of the load 90 via the movable contact a and the fixed contact b of the relay 150, and the other side of the AC input voltage 100 is connected via the P point. Since it is connected to the other side of the load 90, the AC input voltage 100 is applied to the load 90 as it is.

When the overload, disconnection, or short circuit occurs on the output side of the ground fault circuit breaker 110, the ground fault circuit breaker 110 is turned off so that the AC input voltage 100 is the saturable reactor 120 and the load 90. Not authorized to

In addition, when the switching switch 140 is switched on, since the AC input voltage 100 is applied to the lamp 160 as it is, the lamp 160 is turned on so that the AC input voltage 100 is connected to the load 90. ) Is applied as it is.

In the above description, the saturable reactor 120 acts to conduct only a load current to the conductive wire without input and output, and forms a magnetic path on the silicon steel sheet. Thus, when the coil is wound on the silicon steel sheet and the current is passed through, the amperes ( The magnetic flux is generated by Ampere's right-hand law, and the generated magnetic flux has a reverse voltage according to the transformer principle, so that the voltage drops on the secondary coil 124 of the saturable reactor 120. Accordingly, when the magnetic flux is made in a direction opposite to the magnetic flux formed artificially from the outside, no magnetic flux exists, and thus no voltage drop occurs. Therefore, since inductance (L) exists in the saturable reactor 120, it is possible to cancel the phase reactive power 90 kHz ahead of the voltage. Therefore, since the inductance L generates reactive power which is 90 ㅀ behind the voltage and has a reactive reactive power, the power saving device of the present invention improves the power factor so that the power at the load 90 is improved. You can reduce the consumption.

Therefore, the power saving device of the present invention improves the voltage drop and power factor by using the saturable reactor and at the same time, it can save power by stably supplying the necessary power to the load side, and the voltage and current are variable by using the saturable reactor. Therefore, it is possible to reduce power consumption by reducing power consumption, and to set up a plurality of taps proportional to the winding ratio of the secondary coil of the saturable reactor to absorb reactive power and reduce power consumption by supplying only active power to the load. At the same time, AC input power can be supplied directly to the load when the saturable reactor is inoperable, the structure is simple, and manufacturing cost can be reduced.

In the above description, the saturable reactor is mainly used in a method of changing the effective AC reactance of the saturable reactor with a DC excitation current to drop the voltage using the turns ratio of the single winding transformer. In particular, when the input voltage is high, there is no DC excitation current, so the main magnetic flux flows through the iron core on the DC winding side rather than the pores with a large magnetic resistance, so the step-down winding acts to lower the voltage. If the DC coil side has a high magnetoresistance due to the DC magnetic flux, the main magnetic flux flows toward the air gap where the magnetoresistance is small, so that a precise voltage is not applied to the power supply to the load. When required, a saturable reactor is used to provide a stable power supply to the load by compensating for a constant voltage output to the load at all times, regardless of input voltage variations.

In the above description, the specific embodiments have been shown and described, but the present invention is not limited thereto, for example, by those skilled in the art without departing from the concept of the present invention. Of course, the design can be changed in various ways.

As described above, according to the power saving device of the present invention, the saturable reactor can be used to improve the voltage drop and power factor, and at the same time, the power can be stably supplied to the load side to save power, and the saturable reactor can be used for voltage reduction. The power consumption can be reduced by controlling the over current by reducing the power consumption, and by setting a plurality of taps proportional to the winding ratio of the secondary coil of the saturable reactor, absorbing reactive power and supplying only the active power to the load At the same time, the input power can be directly supplied to the load when the saturable reactor is inoperable, the structure is simple, and the manufacturing cost can be reduced.

1 is a block diagram schematically showing a conventional example.

FIG. 2 is a graph illustrating a voltage supplied to a load by the power saving device of FIG. 1.

3 is a block diagram showing a power saving apparatus according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

90: Load 100: AC input voltage

110: earth leakage breaker 120: saturable reactor

122: 1 secondary coil 124: secondary coil

130: Rotary switch 140: Switch

150: Relay 160: Lamp

Claims (2)

An earth leakage circuit breaker 110 that cuts off the supply of the AC input voltage 100 when an earth leakage occurs, a primary coil 122 that receives the AC input voltage 100 input from the earth leakage circuit breaker 110, and the primary coil ( 122 and a saturable reactor 120 including a secondary coil 124 that absorbs reactive power and supplies only active power to the load 90 as current flows through the current, and from 5% to 5% of the AC input voltage 100. Rotary switch for setting any one of the four stage taps (A, B, C, D) branched to the secondary coil 124 of the saturable reactor 120 to save 20% to supply to the load 90 130 and a switching switch 140 for intermittently supplying the AC input voltage 100 to the load 90 when the saturable reactor 120 is inoperable, and to the switching switch 140. The output terminal of the rotary switch 130 is blocked at the time of switching on of the switch 140 which is connected in series, and A relay 150 for controlling the AC input voltage 100 to be directly applied to the load 90, and a lamp 160 indicating that the AC input voltage 100 is directly applied to the load 90. Power saving device, characterized in that configured. The method of claim 1, wherein the tap A of the four stage taps (A, B, C, D) branched to the secondary coil 124 of the saturable reactor 120 is applied to the AC input voltage (100). Is a 20% drop in tap, tap B is a 15% drop in tap for AC input voltage 100, and tap C is 10% drop in tap for AC input voltage 100. And a tab (D) is a voltage-dropped tap of 5% with respect to the AC input voltage (100).