KR20040037935A - Magnetic core controlled transformer - Google Patents

Abstract

PURPOSE: A transformer for controlling a magnetic core is provided to control accurately the secondary voltage by using an additional rotary core except for a main core. CONSTITUTION: A transformer for controlling a magnetic core includes a core, a primary core(102), and secondary cores(103,104). The core is formed with an E-shaped fixing core(101) and a rotary core(105). The rotary core(105) is installed at a predetermined position near to the fixing core(101). The primary core(102) is wound around a center part of the E-shaped fixing core. The secondary cores(103,104) are wound around both sides of the center part of the E-shaped fixing core. The rotary core(105) is installed at the center part of the E-shaped fixing core. The intensity of output voltage is controlled by using the rotation of the rotary core.

Description

Magnetic core controlled transformer {Magnetic core controlled transformer}

The present invention relates to a transformer, and more particularly, to transform the magnetic flux density of a core induced on the primary side and delivered to the secondary side without greatly depending on the coil or the number of turns ratio, which serves as a slidax while being induced on the primary side. The present invention relates to a magnetic core control transformer capable of transferring a voltage to a secondary side by stepping up or down a voltage by controlling a magnetic flux density.

In general, in the case of a power supply device for supplying power to electrical and electronic products and devices, a voltage is supplied to the primary coil wound on the induction core of the silicon steel sheet, which is induced on the secondary side depending on the thickness of the coil and the turns ratio. The voltage is determined and the device or electronics is supplied with the voltage induced on the secondary side. The transformer used in this way is a device using the law of electromagnetic induction, which is very convenient in that the step-up or step-down is very simple depending on the number of turns of the coil. It is possible. In addition, even when using the slicks, the current slices have the disadvantage of having a constant voltage width and shutting off the power supply for changing the voltage because of the step switching method.

The present invention was created in view of the problems in using the conventional transformer as described above, and the role of the slidx by converting the magnetic flux density of the core guided to the primary side and delivered to the secondary side without greatly depending on the coil or the turn ratio. The purpose of the present invention is to provide a magnetically controlled transformer capable of transferring voltage to a secondary side by stepping up or down a voltage by controlling a magnetic flux density induced on a primary side.

1 is a view schematically showing the configuration of a magnetically controlled transformer according to the present invention.

2a to 2c is a view showing a "+" voltage control method having a high output voltage compared to the input voltage using the magnetic core control transformer of the present invention.

3a to 3c is a view showing a "-" voltage control method of the output voltage is lower than the input voltage using the magnetic core control transformer of the present invention.

4a to 4c is a view showing a voltage control method using a magnetic core control transformer according to another embodiment of the present invention.

5a to 5c is a view showing a voltage control method using a magnetic core control transformer according to another embodiment of the present invention.

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

101 ... E-shaped fixed core 102 ... primary coil

103,104 ... secondary coil 105 ... rotating core

401,501 ... fixed core 402,502 ... rotated core

403a, 403b ... primary coils 404a, 404b, 405a, 405b ... secondary coils

401a to 401d ... protrusions 503a to 503c ... primary coil

504a to 504c, 505a to 505c ... secondary coil

In order to achieve the above object, the magnetic core control transformer according to the present invention is a transformer having a core for forming a magnetic path and a coil on the primary side and a secondary side wound around the core,

The core is composed of an E-shaped fixed core, the primary coil of the power input side is wound around the central branch of the E-shaped core, and the secondary coils of the power output side are wound around each branch located on both sides of the central branch. In the center of the magnetic core, an arc-shaped separate rotating core is installed to be able to rotate left and right facing the three core ends, and is guided by the primary coil according to the left and right rotation of the separate rotating core to the secondary coil. According to the control of the amount of the magnetic flux flowing is characterized in that it is configured to output by varying the magnitude of the voltage induced by the secondary side coil output.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing the configuration of a magnetic core control transformer according to the present invention.

Referring to FIG. 1, a magnetic core controlled transformer according to the present invention includes a core 101 for forming a magnetic path, a primary coil 102 wound around the core 101, and a secondary coil 103, 104. do. The core 101 is composed of an E-shaped fixed core, the primary coil 102 of the power input side is wound around the central branch of the E-shaped core 101, and each branch located on both sides of the central branch has a power output side. Of the secondary coils 103 and 104 are wound around each other, and an arc-shaped separate rotating core 105 is installed at an approximately central portion of the E-shaped core 101 to allow left and right rotations to face three core ends. By controlling the amount of magnetic flux induced by the primary coil 102 in accordance with the left and right rotation of the separate rotary core 105, the secondary coil 103 (104) It is configured to output by adjusting the magnitude of the output voltage induced by).

Here, the E-shaped core 101 is manufactured by laminating silicon steel sheets or made of an amorphous iron core material, and the rotating core 105 is formed of three of the E-shaped core 101. A certain area facing the core end has an arc-shaped appearance with a large radius, and the remaining area except the arc portion of the large radius is cut off stepwise from the arc-shaped portion of the large radius, and is relatively smaller than the arc-shaped portion of the large radius. Consists of a circular arc of a small radius.

Then, a method of controlling the voltage using the magnetic core control transformer of the present invention having the above configuration will be described.

2a to 2c is a view showing a "+" voltage control method having a high output voltage compared to the input voltage using the magnetic control transformer of the present invention.

Referring to FIG. 2A, in the magnetic core control type transformer of the present invention, when the rotation core 105 is in a fixed position and a voltage is input through the primary coil 102, the magnetic flux caused by electromagnetic induction is secondary coil. The difference in the magnetic flux which is transmitted as it is to the core portions S1 and S2 of the 103 and 104 and is induced between both the S1 and S2 sides becomes "0". Thus, twice the voltage of the input voltage is output to the output terminal.

Next, as shown in FIG. 2B, when the rotating core 105 is rotated by an angle to the left and its facing portion is connected to the core end portion of the S2 side by about 1/2, only half of the magnetic flux induced by the P side core is It is delivered to the core on the S2 side. In this case, since the S1 side is 1 and the S2 side is 1/2, the difference between them is 1/2. Therefore, the maximum output voltage compared to the input voltage is (1 + 0.5) times the input voltage. In this case, when the input voltage is 220V, the output voltage is 330V (= 220V + 110V), and when the input voltage is 110V, the output voltage is 165V (110V + 55V).

As shown in FIG. 2C, when the rotating core 105 is further rotated to the left so that the facing portion of the rotating core 105 is not connected to the core end of the S2 side, the transmitted magnetic flux is S1 = 1 and S2 = 0, so that the input voltage And output voltage become the same. That is, when the input voltage is 220V, the output voltage is also 220V.

On the other hand, Figures 3a to 3c is a view showing a "-" voltage control method having a low output voltage compared to the input voltage using the magnetic control transformer of the present invention.

This "-" voltage control method differs from the " + " voltage control method in that the rotating core 105 is rotated to the right. That is, as the rotary core 105 is gradually rotated to the right side, the magnetic flux induced on the P1 side is guided to the S2 side corresponding to the rotation angle. As a result, as in FIGS. 2A to 2C, the amount of magnetic flux induced on the S1 and S2 sides is different. The voltage is only reduced while applying a circuit such as a parallel transformer.

In the case of FIG. 3A, the rotary core 105 is in the correct position, and the input voltage is transmitted to S1 and S2 as it is, so that the difference between them becomes "0". That is, twice the input voltage is output.

As shown in FIG. 3B, when the rotating core 105 is rotated to the right and connected to S1 by about 1/2, 1/2 of the magnetic flux density induced by P is transmitted to S1. Therefore, S1 = 1/2 and S2 = 1. That is, 1/2 of the input voltage is supplied to the secondary side, so that "-" voltage control is possible.

As shown in FIG. 3C, when the rotating core 105 is further rotated to the right so that the facing portion of the rotating core 105 is not connected to the S1 side, the magnetic flux induced by the P side is not transmitted to the S1 side. Therefore, S1 = 0 and S2 = 1. That is, since S1-S2 = -1, the voltage induced on the secondary side according to the circuit of the parallel transformer cancels S1 and S2 and becomes "-" as much as the input voltage.

As described above, not only the control of the voltages output to the secondary side as "+" and "-" is possible in accordance with the change in the left and right rotation angles of the rotary core 105, but also the output voltage is finely adjusted according to various resolutions. You can control it.

On the other hand, Figures 4a to 4c is a view showing a voltage control method using a magnetic core control transformer according to another embodiment of the present invention, Figures 5a to 5c is a voltage using a magnetic core control transformer according to another embodiment of the present invention This figure shows a control method.

First, referring to FIGS. 4A to 4C, a magnetic core controlled transformer according to another embodiment of the present invention includes a core for forming a magnetic path, and a transformer having a primary side and a secondary side coil wound around the core, wherein each core It consists of a square fixed core 401 having a plurality of protrusions 401a to 401d each protruding from the center of the side toward the center of the quadrangle and a rotating core 402 provided at the center of the fixed core 401.

Primary coils 403a and 403b on the power input side are wound around a pair of opposing protrusions 401a and 401c of the plurality of inwardly projecting portions 401a to 401d, respectively, and the primary coils 403a and 403b. Secondary coils 404a, 404b, 405a and 405b on the power output side are wound around the body portions of the rectangular fixing cores 401 located on the left and right sides of the wound protrusions 401a and 401c, respectively. By changing the area of the facing portion of the fixed core 401 and the rotating core 402 in accordance with the left and right rotation of the 402, guided by the primary side coils 403a and 403b, the secondary side coils 404a and 404b. By controlling the amount of magnetic flux flowing toward the 405a and 405b, the secondary coils 404a, 404b, 405a, and 405b can be output in various ways by adjusting the magnitude of the voltage. Here, the number of the protrusions 401a to 401d may be variously changed to four, eight, twelve, sixteen, or the like.

In addition, the rotating core 402 has a fan-shaped magnetic flux control region formed symmetrically with respect to the center of rotation, and both ends protrude, and the middle portion between them is configured as a concave failure type structure.

5A to 5C, a magnetic core controlled transformer according to another embodiment of the present invention includes a core for forming a magnetic path and a transformer having a primary side and a secondary side coil wound around the core, wherein the core is a circle. It consists of a circular fixed core 501 having a plurality of projections each formed to be spaced apart from each other at a predetermined interval toward the center of the rotary core 502 is installed in the center of the fixed core 501.

Primary coils 503a to 503c on the power input side are wound around a plurality of protrusions (in this example, three protrusions located at 120 ° intervals) which are not adjacent to each other among the inward protrusions, and the primary coils 503a The secondary coils 504a to 504c and 505a to 505c on the power output side are respectively wound on the remaining protrusions except for the protrusions wound around 503c, and the fixed core 501 and the left and right rotations of the rotating core 502 are wound. By changing the area of the facing portion of the rotating core 502, the secondary side is controlled by controlling the amount of magnetic flux induced by the primary coils 503a to 503c and flowing toward the secondary coils 504a to 504c and 505a to 505c. The voltages induced by the coils 504a to 504c and 505a to 505c to be output can be variously adjusted. Here, the number of protrusions may be variously changed to four, nine, thirteen, seventeen, and the like.

In addition, the rotating core 502 is composed of a failure type structure having three protrusions, in which three arc-shaped magnetic flux control regions are formed at equal intervals with respect to the rotation center axis.

The principle of controlling the voltage by the magnetic core control transformer according to another embodiment and another embodiment of the present invention as described above is the same as described with reference to Figures 2a to 2c and 3a to 3c. Therefore, description thereof will be omitted.

As described above, the magnetic core control transformer according to the present invention is not a conventional coil winding ratio fixed type or a coil winding ratio converting method by tap change, but provides a separate rotary core in addition to the main core and according to the rotation of the rotary core 2 The method of controlling the magnitude of the voltage induced in the secondary coil by varying the amount of magnetic flux flowing to the secondary coil has the following advantages and effects.

First, the secondary voltage output to the transformer can be controlled much finer than the conventional winding transformer.

Second, the voltage control by using the conventional transformer + slidax can be replaced by only a magnetic core control transformer, thereby reducing the cost.

Third, it is possible to replace the automatic voltage regulator (AVR) used to maintain a constant voltage, and can obtain a great economic benefit at low cost.

Claims (6)

In the transformer comprising a core for forming a magnetic path, and coils on the primary side and secondary side wound around the core, The core is composed of an E-shaped fixed core and a rotating core installed in close proximity to the fixed core. The central branch of the E-shaped fixed core is wound with a primary coil on the power input side, and each branch positioned on both sides of the central branch The secondary coil on the power output side is wound, and an arc-shaped separate rotating core is installed at the center of the E-shaped fixed core so as to be able to rotate left and right facing the three fixed core ends. By controlling the amount of magnetic flux induced by the primary coil and flowing toward the secondary coil by varying the area of the facing surface of the fixed core and the rotating core, the amount of voltage induced and output to the secondary coil is variously adjusted. Magnetically controlled transformer characterized in that the output is configured to. The method of claim 1, The rotating core has a circular arc-shaped appearance with a large radius up to a predetermined area facing the three core ends of the E-shaped fixed core, and the remaining region except for the circular arc portion of the large-radius is stepped from the arc-shaped portion of the large radius. Magnetically controlled transformer characterized in that it is configured to form a circular arc portion of a small radius relatively small compared to the circular arc portion of the large radius. In the transformer comprising a core for forming a magnetic path, and coils on the primary side and secondary side wound around the core, The core consists of a fixed core having a rectangular shape having a plurality of protrusions protruding from the center of each side toward the center of the square and a rotating core installed in the center of the fixed core, a pair of opposed inward protrusions The primary coils of the power input side are respectively wound on the protrusions of the power input side, and the secondary coils of the power output side are respectively wound on the body portions of the rectangular fixed cores located on the left and right sides of the protrusions on which the primary coils are wound. Accordingly, by controlling the amount of magnetic flux induced by the primary coil and flowing toward the secondary coil by changing the area of the facing portion of the fixed core and the rotating core, the magnitude of the voltage induced and output to the secondary coil is variously adjusted. Magnetically controlled transformer, characterized in that configured to output. The method of claim 3, The rotating core is a magnetic core control transformer, characterized in that the fan-shaped magnetic flux control region is formed symmetrically with respect to the rotation center axis, both ends protrude and the middle portion between them is a concave failure type structure. In the transformer comprising a core for forming a magnetic path, and coils on the primary side and secondary side wound around the core, The core is composed of a circular fixed core having a plurality of protrusions each formed to be spaced apart from each other at a predetermined interval toward the center of the circle and a rotating core installed in the center of the fixed core, a plurality of non-neighboring protrusions adjacent to each other The primary coil of the power input side is wound around the protrusions of the power input side, and the secondary coils of the power output side are wound around the other protrusions except the protrusions on which the primary coil is wound, respectively. By controlling the amount of magnetic flux induced by the primary side coil and flowing toward the secondary side coil by varying the area of the facing part of, it is configured to output variously by adjusting the magnitude of the voltage induced by the secondary side coil. Magnetically controlled transformer, characterized in that. The method of claim 5, And the rotating core has a failure type structure having three protrusions in which three arc-shaped magnetic flux control regions are formed at equal intervals with respect to the central axis of rotation.