TWM637468U - High-frequency wire-winding magnetic core inductor - Google Patents

Abstract

A wire-wound magnetic core inductor for high-frequency use, comprising a magnetic core, a winding group and a plurality of resistors, wherein the magnetic core includes a long straight section, a diameter-contracted section connected to the long straight section, and a diameter-contracted section connected The short straight section, the end-to-end of the reduced diameter section is tapered and formed based on a tapered angle, the long straight section is formed according to the first diameter, and the short straight section is formed according to the second diameter, the first diameter is greater than the second diameter; The wire group is formed by winding a wire on the magnetic core corresponding to the long straight section, the narrowed diameter section and the short straight section, and the winding group has a first signal end and a second signal end; a plurality of resistors are welded to over the winding set. In this way, the high-frequency wire-wound core inductor of this creation has the application capability of high-frequency and wide-band.

Description

Wire Wound Core Inductors for High Frequency

This creation is related to the technical field of inductance, especially a kind of wire-wound magnetic core inductor for high frequency and wide frequency band.

Inductors are indispensable electronic components in radio frequency circuits and power circuits. They can be used not only as filter coils, but also as choke coils to alleviate current changes and protect loads.

Taiwan Patent No. 239217 (hereinafter referred to as '217) discloses a high-frequency choke coil. The following description continues to use the symbols disclosed in '217. The high-frequency choke coil includes a magnetic core 1, split coils 2, 3, 4, 5, and 6. and resistive rings 7, 7'.

The high-frequency choke coil revealed in '217 is a wire-wound magnetic core inductor, commonly known as an R-rod inductor. Engineers who have been involved in the design and production of R-rod inductors for a long time must know that the resistive rings 7 and 7' are used as damping resistors. It is used to suppress the self-resonance generated by each split coil 2, 3, 4, 5, 6.

The high-frequency choke coil disclosed in '217 is limited to the frequency range of 5 MHz to 1,000 MHz, and the insertion loss (Insertion loss) of the high-frequency choke coil in the aforementioned frequency range can be lower than 0.8 dB. However, once the frequency range exceeds 1,000 MHz MHz, the feeding loss of the high frequency choke coil will increase abruptly. Obviously, the choke coil disclosed in '217 can no longer meet the current demand for high frequency and broadband.

In view of this, the creators of this case tried their best to study, and finally developed and completed this creation of a high-frequency wire-wound core inductor.

The purpose of this invention is to provide a high-frequency wire-wound core inductor to solve the above mentioned difficulties in the prior art.

According to the embodiment of the invention, there is provided a wire wound core inductor for high frequency, comprising: a magnetic core, including a long straight section, a diameter-reduced section and a short straight section, the two ends of the diameter-reduced section are respectively connected to the long The straight section and the short straight section are formed from end to end based on a tapered angle, the length of the long straight section is greater than the length of the short straight section, and the long straight section is formed according to the first diameter Forming, the short straight section is formed according to the second diameter, and the first diameter is larger than the second diameter; a winding group is to use a wire corresponding to the long straight section, the reduced diameter section and the short straight section to wind around the magnetic It is formed on the core, and the winding set has a first signal end and a second signal end; and a plurality of resistors are soldered to the winding set.

According to the embodiment of the invention, there is provided a wire wound core inductor for high frequency, comprising: a magnetic core, including a long straight section, a diameter-reduced section and a short straight section, the two ends of the diameter-reduced section are respectively connected to the long The straight section and the short straight section are formed from end to end based on a tapered angle, the length of the long straight section is greater than the length of the short straight section, and the long straight section is formed according to the first diameter Forming, the short straight section is formed according to the second diameter, and the first diameter is larger than the second diameter; a winding group is to use a wire corresponding to the long straight section, the reduced diameter section and the short straight section to wind around the magnetic It is formed on the core, and the winding set has a first signal end and a second signal end; and a plurality of resistors are soldered to the winding set.

According to an embodiment of the invention, a wire-wound magnetic core inductor for high frequency is provided. The winding group includes: a first coil, the first coil has a first wire end and a second wire end, and the first wire end As the first signal end of the winding group, the first wire end is used as a first coil starting point, the second wire end is used as a first coil end point, and the connection between the first wire end and the second wire end is The space is formed by winding the wire along a first winding direction on the long straight section of the magnetic core; and a second coil, the second coil has a third wire end and a fourth wire end, The third wire end is connected to the second wire end of the first coil, and the connection between the second and third wire ends forms a connecting section, the second coil includes a third winding portion and a fourth winding portion, The third winding part uses the wire to take the third wire end as a starting point of a third winding part, and then winds on the long straight section and the radially contracted section of the magnetic core along a second winding direction Formed, the winding diameter of the starting point of the third winding part is greater than the winding diameter of the end point of the first coil, and the fourth winding part uses the wire to take a third winding part end point of the third winding part as a The starting point of the fourth winding part is formed by winding on the narrowed section and the short straight section of the magnetic core along the second winding direction, and the fourth wire end is used as a part of the fourth winding part The end point of the fourth winding part, the fourth wire end is used as the second signal end of the winding group, the connection point between the end point of the third winding part and the starting point of the fourth winding part forms a distance, and the distance separates the first The distance between the third winding part and the fourth winding part corresponds to the radially contracted section of the magnetic core.

According to an embodiment of the present invention, a wire-wound magnetic core inductor for high frequency is provided, the first and second winding directions are different from each other, the first winding direction is clockwise, and the second winding direction is counterclockwise , the first and second winding directions are reversed at the connecting section.

According to an embodiment of the invention, a wound core inductor for high frequency is provided, the first coil has a first number of turns, the second coil has a second number of turns, and the third winding of the second coil The wire part has a third winding part number of turns, and the fourth winding part of the second coil has a fourth winding part number of turns, wherein the number of turns of the first coil is greater than the number of turns of the second coil, and the number of turns of the first coil is greater than that of the second coil. The number of turns of the third winding part is greater than the number of turns of the fourth winding part.

According to an embodiment of the present invention, a wound core inductor for high frequency is provided, the winding diameter of the third winding portion and the fourth winding portion of the second coil follows the end-to-end of the diameter-contracting section and the short straight section. The end gradually shrinks in diameter and correspondingly gradually shrinks.

This creation is formed by winding the wires corresponding to the long straight section, diameter-reduced section, and short straight section on the magnetic core through the winding group. In this way, the high-frequency wound core inductor has high-frequency and wide-band application capabilities. .

The above description is only used to explain the problem to be solved by this creation, the technical means to solve the problem, and its effects, etc. The specific details of this creation will be introduced in detail in the following implementation methods and related drawings.

In order to enable your review committee members to have a better understanding of this creation, hereby cite the preferred embodiment and cooperate with the drawings, as follows in detail:

Please refer to Figures 1, 2, 3, and 4 at the same time. This creation provides a high-frequency wire-wound core inductor, wherein the structure of the high-frequency wire-wound core inductor 1 includes a magnetic core 11, a winding group CW and A plurality of resistors 14.

Firstly, the magnetic core 11 is described. Please refer to FIGS. 1, 2, and 3 at the same time. The magnetic core 11 is a columnar body. The magnetic core 11 includes a long straight section 111, a diameter-reduced section 112 and a short straight section 113, wherein:

The two ends of the narrowing section 112 are respectively connected to one end of the long straight section 111 and one end of the short straight section 113, the length of the long straight section 111 is greater than the length of the short straight section 113, and the long straight section 111 is formed into a cylinder according to the first diameter Ø1 , the short straight section 113 is formed into a cylinder according to the second diameter Ø2, and the first diameter Ø1 is larger than the second diameter Ø2.

In addition, the shrinking section 112 is a cone, and the end-to-end of the shrinking section 112 is tapered and formed based on the tapering angle β. The tapering angle β is between 22 degrees and 25 degrees. The shrinking section 112 The outer peripheral surfaces of the end and the end have an oblique length Sd. In particular, one end of the reduced-diameter section 112 of the present invention has a third diameter Ø3, and the third diameter Ø3 is equal to the second diameter Ø2, wherein the third diameter Ø3 and the oblique length Sd have a length ratio to each other, and the length ratio is between 1:3 to 1:7.

Next, the winding group CW will be explained. Please refer to FIGS. 1, 2 and 4 at the same time. The winding group CW is formed by winding a wire corresponding to the long straight section 111, the radially narrowed section 112 and the short straight section 113 on the magnetic core 11. The two ends of the winding group CW have a first signal end and a second signal end. In particular, the winding set CW includes a first coil 12 and a second coil 13 connected to the first coil 12 , and the first and second coils 12 and 13 are formed by winding the same wire.

The first coil 12 has a first wire end 12F and a second wire end 12S, and the first wire end 12F is used as a first signal end of the winding group CW. The first coil 12 utilizes a wire with the first wire end 12F as a first coil starting point, and the second wire end 12S as a first coil end point, and the first wire end 12F and the second wire end 12S are connected by a wire. The same wire is wound on the long straight section 111 of the magnetic core 11 along a first winding direction, and the first winding direction is clockwise.

On the other hand, the second coil 13 has a third wire end 13T and a fourth wire end 13F, the third wire end 13T is connected to the second wire end 12S, and the junction of the second and third wire ends 12S and 13T forms a U-shaped bend. Shaped connecting section (please refer to FIG. 4 ), this connecting section connects the first and second coils 12, 13. The second coil 13 includes a third winding part 131 and a fourth winding part 132, wherein the third winding part 131 uses the same wire with the third wire end 13T as the starting point of the third winding part, and then along The second winding direction is formed by winding on the long straight section 111 and the tapered section 112 of the magnetic core 11 . Moreover, the winding diameter at the starting point of the third winding part is larger than the winding diameter at the end point of the first coil.

Moreover, the fourth winding part 132 utilizes the same wire to take the end point of the third winding part of the third winding part 131 as the starting point of the fourth winding part, and then winds around the end of the magnetic core 11 along the second winding direction. The shrinking section 112 and the short straight section 113 are formed on top of the end point of the third winding part and the starting point of the fourth winding part to form a distance, which separates the third winding part 131 and the fourth winding part 132 , and the distance corresponds to the radially contracted section 112 of the magnetic core 11 . The fourth wire end 13F is the end point of the fourth winding portion of the fourth winding portion 132 and also serves as the second signal end of the winding set CW. It is worth noting that, as shown in FIG. 1 , FIG. 2 and FIG. 4 , the winding diameter of the second coil 13 and its third winding portion 131 and fourth winding portion 132 increases with the diameter of the shrinking section 112 and the short straight section 113 . The end-to-end gradual diameter shrinks correspondingly, especially the short straight section 113 of the fourth winding portion 132 is one of the factors affecting the 3,000 MHz frequency characteristic. The second winding direction is counterclockwise, that is to say, the first and second winding directions are different from each other, and the first and second winding directions are reversed at the connecting section.

The first coil 12 has a first number of turns, the second coil 13 has a second number of turns, the third winding part 131 of the second coil 13 has a third number of turns, and the second coil 13 has a third number of turns. The fourth winding part 132 has a fourth winding number of turns, wherein the first winding number of turns is greater than the second winding number of turns, and the third winding number of turns is greater than the fourth winding number of turns. In particular, the number of turns of the first coil 12 disclosed in Fig. 1, Fig. 2 and Fig. 4 is 12, and the winding diameter of each turn of the first coil 12 is the same; moreover, the number of turns of the second coil 13 is 6, and the number of turns of the second coil 13 The winding diameter of each turn is different. Moreover, the number of turns of the third winding portion of the second coil 13 is 4, and the number of turns of the fourth winding portion of the second coil 13 is 2. The number of turns disclosed above is only used as an exemplary implementation. For example, the actual values of the first and second coils 12 and 13 are not limited by this.

Continue to refer to FIG. 1 , FIG. 2 and FIG. 4 . Engineers who are familiar with the design and manufacture of R rod inductors must know that the function of the plurality of resistors 14 welded to the winding group CW is to suppress the first coil 12 and/or the second coil 13 on the high-frequency wound core. Self-resonance occurs when the inductor 1 works. In particular, each resistor 14 is 270Ω, and the ohms disclosed above are only used as an exemplary embodiment, and are not intended to limit the actual value of the resistors 14 .

The high-frequency wire-wound magnetic core inductor 1 of this creation can be applied to electronic circuits, and the electronic circuit is any of the following: power conversion circuit, power supply circuit, power amplifier circuit, radio frequency circuit, wireless communication circuit, noise filter circuit, silicon controlled rectifier (SCR) control circuit, thyristor control circuit, triac control circuit (TRIAC) control circuit, modulation and demodulation circuit or network transmission circuit.

In order to prove that the high-frequency wire-wound core inductor 1 used has high-frequency and wide-band application capabilities, this creation further completes the relevant frequency-domain characteristic measurement. Figure 7 shows the frequency relative to the insertion loss (Insertion loss). Data graph, in which:

The electrical parameters of the high-frequency wire-wound core inductor 1 of this creation are as follows:

Frequency: 5 MHz to 1,000 MHz;

Inductance: 5.6 μH to 6.0 μH;

AC Power: 30VAC to 90VAC, 15 AMPS.

Figure 7 is based on the measurement of electrical parameters, especially marking 5 data reading points, and the feed-in loss obtained at different frequencies is as follows:

The first data reading point, when the frequency is 10 MHz, the feed-in loss is -0.44 dB;

The second data reading point, when the frequency is 1,200 MHz, the feed-in loss is -0.33 dB;

At the reading point of the third data, when the frequency is 1,800 MHz, the feed-in loss is -0.62 dB;

At the 4th data reading point, when the frequency is 2,000 MHz, the feed-in loss is -0.99 dB;

At the 5th data reading point, when the frequency is 3,000 MHz, the feed-in loss is -1.76 dB.

The wire wound magnetic core inductance 1 for high frequency in this creation shows a gradual upward trend with the increase of frequency, the maximum feed loss -1.76 dB occurs at a frequency of 3,000 MHz, and the feed loss at 3,000 MHz is affected by Inhibition is that the winding diameter of the second coil 13 and its third winding part 131 and fourth winding part 132 gradually decreases as the end-to-end diameter of the narrowing section 112 and the short straight section 113 gradually shrinks, and the fourth The short straight section 113 corresponding to the winding portion 132 is one of the factors for suppressing the feed-in loss at a frequency of 3,000 MHz. Therefore, this creation provides a high-frequency wire wound magnetic core inductor. It is confirmed by the above measurement data that this creation uses wires corresponding to the long straight section 111 , the radially narrowed section 112 and the short straight section 113 to wind the magnetic core through the winding group CW. 11, thus, the high-frequency wire-wound core inductor 1 of this creation meets the needs of high-frequency and wide-band.

Finally, the embodiments disclosed above are not intended to limit this creation. Anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of this creation, and all of them can be protected in this creation. creation. Therefore, the scope of protection of this creation should be defined by the scope of the attached patent application.

[this creation] 1: Wound core inductors for high frequency 11:Magnetic core 12: The first coil 13: Second coil 14: Resistance CW: winding group 111: long straight section 112: Diameter shrinkage section 113: short straight section β: taper angle Sd: oblique length Ø1: first diameter Ø2: second diameter Ø3: the third diameter 12F: first line terminal 12S: the second terminal 13T: the third terminal 13F: The fourth terminal 131: The third winding part 132: The fourth winding part

[knowledge] 1: Magnetic core 2, 3, 4, 5, 6: split coil 7, 7': Resistive ring

Figure 1: Stereoscopic view of the wire-wound core inductor for high-frequency use in this creation; Figure 2: Another perspective view of the high-frequency wire-wound core inductor used in this creation; Figure 3: The side view of the magnetic core of the high-frequency wire-wound core inductor of this creation; Figure 4: The side view of the winding group of the high-frequency wire-wound core inductor used in this creation; Figure 5: The data curve of the frequency of the wound magnetic core inductance for high frequency use in this invention relative to the feed-in loss.

1: Wound core inductors for high frequency

11:Magnetic core

12: The first coil

13: Second coil

14: Resistance

CW: winding group

12F: first line end

13F: The fourth terminal

131: The third winding part

132: The fourth winding part

Claims (9)

A wire-wound magnetic core inductor for high frequency, comprising: a magnetic core, the magnetic core includes a long straight section, a diameter-contracted section, and a short straight section, and the two ends of the diameter-contracted section are respectively connected to the long straight section and the The short straight section is formed from end to end based on a tapered angle, the length of the long straight section is greater than the length of the short straight section, the long straight section is formed according to a first diameter, and the long straight section is formed according to a first diameter. The short straight section is shaped according to a second diameter, and the first diameter is greater than the second diameter; a winding group, the winding group uses a wire corresponding to the long straight section, the reduced diameter section and the short straight section to be wound on It is formed on the magnetic core, and the winding set has a first signal end and a second signal end; and a plurality of resistors are welded on the winding set. The wound core inductor for high frequency use as claimed in claim 1, wherein the taper angle is between 22 degrees and 25 degrees. The wire wound magnetic core inductor for high frequency use as claimed in claim 1, wherein the end of the diameter-constricted section and the outer peripheral surface of the end have an oblique length. The wound magnetic core inductor for high frequency according to claim 3, wherein, one end of the constricted section has a third diameter, the third diameter is equal to the second diameter, and the third diameter and the oblique length have the same length as each other. A length ratio, the length ratio is between 1:3 and 1:7. The wire wound magnetic core inductor for high frequency use as described in claim 1, wherein the winding group includes: a first coil, the first coil has a first wire end and a second wire end, the first wire end as the first signal end of the winding set, the first wire end as a first coil starting point, the second wire end as a first coil end point, the first wire end and the second wire end The wire is wound on the long straight section of the magnetic core along a first winding direction; and a second coil has a third wire end and a fourth wire end , the third wire end is connected to the second wire end of the first coil, and the connection between the second and third wire ends forms a connecting section, and the second coil includes a third winding portion and a fourth winding portion , the third winding part is to use the wire to take the third wire end as a starting point of a third winding part, and then wind along a second winding direction between the long straight section and the radially contracted section of the magnetic core Formed above, the winding diameter of the starting point of the third winding part is larger than the winding diameter of the end point of the first coil, and the fourth winding part uses the wire to use the end point of a third winding part of the third winding part as A starting point of a fourth winding part is formed by winding on the narrowed section and the short straight section of the magnetic core along the second winding direction, and the fourth wire end is used as the fourth winding part An end point of the fourth winding part, the fourth wire end is used as the second signal end of the winding group, a distance is formed between the end point of the third winding part and the starting point of the fourth winding part, and the distance separates the The distance between the third winding portion and the fourth winding portion corresponds to the radially contracted section of the magnetic core. The wire-wound core inductor for high-frequency use as described in Claim 5, wherein the first and second winding directions are different from each other, the first winding direction is clockwise, and the second winding direction is counterclockwise direction, the first and second winding directions are reversed at the connecting section. The wound magnetic core inductor for high frequency as described in claim 5, wherein, the first coil has a first coil number of turns, the second coil has a second coil number of turns, and the second coil has a The third winding part has a third winding part number of turns, the fourth winding part of the second coil has a fourth winding part number of turns, wherein the number of turns of the first coil is greater than the number of turns of the second coil The number of turns of the third winding part is greater than the number of turns of the fourth winding part. The wound core inductor for high-frequency use as described in Claim 5, wherein, the winding diameter of the third winding part and the fourth winding part of the second coil follows the ends of the diameter-contracting section and the short straight section. The diameter gradually shrinks from end to end and gradually shrinks accordingly. The wound core inductor for high frequency as described in any one of claims 1 to 8, wherein the wound core inductor for high frequency is applied to an electronic circuit, and the electronic circuit is any of the following: power conversion circuit, power supply circuit, power amplifier circuit, radio frequency circuit, wireless communication circuit, noise filter circuit, silicon controlled rectifier (SCR) control circuit, thyristor control circuit, triac control circuit (TRIAC) control circuit, modulation demodulation circuit or network transmission circuit.

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