JPH07130535A - Magnetization of electromagnet and printed wiring type electromagnet - Google Patents

Abstract

PURPOSE:To enable an occupied area of coils to be constructed in reduction under the same generated magnetomotive force by generating inverse spiral currents two-dimensionally on the same plane adjacently and alternately with each core, as a center, in which parallel core ends are alternately in continuous series. CONSTITUTION:Outside soldered connection terminals 13a and 13b of spiral wiring coils 10a and 10d are respectively connected to both ends of a power source 15 through a jumper line 14c and an exciting current I is charged. Then the exciting current I runs through jumper lines 14a and 14b consistently, consecutively and commonly to spiral wiring coils 10a to 10d. At this time, spiral currents are generated adjacently and alternately with each core 11a to 11d two-dimensionally on the same surface 9a of a printed board 9 and magnetic fields are generated in the direction or arrow on each core 11a to 11d, and a line of magnetic force, which is consistent, consecutive, and common c in one direction from S pole to N pole along a crank core 1-1, is excited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for magnetizing an electromagnet formed by printing and depositing a conductor wiring pattern on a printed wiring board by a driving excitation coil such as an electromagnetic relay by etching or the like, and directly to its implementation The present invention relates to a printed wiring type electromagnet used.

[0002]

2. Description of the Related Art A core winding type electromagnet generally used conventionally has a three-dimensional three-dimensional structure in which a coil winding is wound around the surface of an exciting core such as soft iron. Therefore, in the manufacturing process of the electromagnet, the work of winding the coil winding on the excitation core is indispensable, which has been a major factor in raising the manufacturing cost of the electromagnet.

In order to omit this work process and reduce the manufacturing cost, there has been proposed a printed wiring type electromagnet in which a coil winding is printed on a printed wiring board by etching to form a coil pattern. Specifically, a coil is made of spiral printed wiring, and a ferromagnetic core composed of soft iron or the like is vertically penetrated through the coil at the center of the coil. Since it can be manufactured in one step, there is an advantage that the manufacturing cost of the electromagnet can be remarkably reduced.

The structure of this conventional printed wiring type electromagnet will be described. FIG. 5 shows a plan view of a conventional printed wiring type electromagnet, and FIG. 6 shows a vertical sectional view taken along line VI-VI in FIG. In the figure, α is a conventional printed wiring type electromagnet, 1 is a double-sided printed wiring board, 2 is a spiral wiring coil, 3 is a rod-shaped core, 4 is a core through hole, 5 is a through hole, and 6a and 6b are connection wiring patterns. , 7a, 7b are solder connection terminals, and 8 is a power source.

A conventional printed wiring type electromagnet α shown in FIGS. 5 to 6 is provided on the front surface 1a of the double-sided printed wiring board 1.
A spiral wiring coil 2 having a spiral coil pattern is formed by etching from an area closer to the center, and a core 3 made of a ferromagnetic material such as soft iron is formed in the center of the spiral wiring coil 2 in the spiral wiring. The coil 2 is inserted in a core through hole 4 provided in the center of the coil 2 in a direction orthogonal to the surface of the double-sided printed wiring board 1, and the magnetic field generated by the spiral wiring coil 2 passes through the core 3.

The double-sided printed circuit board 1 corresponding to the center side end of the spiral wiring coil 2 has a through hole 5 formed therethrough.
The printed wiring board 1 is electrically connected to the connection wiring pattern 6b for supplying the exciting current I formed on the back surface 1b and is drawn to the power supply terminal 7b at the peripheral edge of the back surface 1b.

Similarly, a connection wiring pattern 6a for supplying the exciting current I is electrically connected from the outer peripheral side end of the spiral wiring coil 2 to the power supply terminal 7a on the peripheral edge of the front surface 1a of the double-sided printed wiring board 1. .

By passing the exciting current I between the power supply terminals 7a and 7b, a magnetic field indicated by the arrow in the drawing is generated,
The core 3 is magnetized and operates as an electromagnet. Further, a multilayer printed wiring board (not shown) is adopted in place of the double-sided printed wiring board 1, and a plurality of spiral wiring coils 2 are integrally laminated to increase the magnetomotive force according to the number of layers. Have been adopted selectively.

[0009]

However, each of the conventional printed wiring type electromagnets α has the spiral wiring coil 2
Since the two-dimensional printed wiring board 1 has a two-dimensional plane structure, it is possible to make the printed wiring type electromagnet α itself thin.
However, there is a drawback that the occupied area increases in proportion to the square of the number of windings.

In consideration of application to a device which requires a small construction size such as an electromagnetic relay and a strong magnetic field to be generated, an increase in the number of coil windings is an essential element in the construction. In this case, there is a drawback that the occupied area of the electromagnet increases dramatically. Here, the present invention is to provide an electromagnet magnetization method and a printed wiring type electromagnet capable of reducing the occupied area of a coil under the same generated magnetomotive force.

[0011]

The solution to the above-mentioned problems can be achieved by adopting the novel characteristic construction method and means listed in the following by the present invention. That is, the first feature of the method of the present invention is to generate reverse eddy currents in the two-dimensionally on the same plane and adjacent alternately centering on each core in which parallel core ends are staggered in series, and the core groups are formed. This is an electromagnet magnetization method in which lines of magnetic force that are consistently continuous in one direction are magnetized.

A second feature of the method of the present invention is an electromagnet magnetization method in which the reverse spiral current groups in the first feature of the method are generated in a consistent continuous common manner.

The third feature of the method of the present invention is an electromagnetization method in which the reverse eddy currents in the first or second feature of the method are generated in the same direction in each of the multilayer planes.

A fourth characteristic of the method of the present invention is that the reverse spiral current group in the first, second or third characteristic of the method is printed on a printed circuit board by a single power source through a spiral wiring coil group. It is an electromagnet magnetization method that is created by

The first feature of the device of the present invention is that the printed circuit board on which a plurality of spiral wiring coils are printed and the parallel core ends projecting through the centers of the respective spiral wiring coils are staggered in a staggered manner through a magnetic path. A printed wiring type electromagnet including a core group that is sequentially connected in series.

A second feature of the device of the present invention is a printed wiring type electromagnet in which the core group in the first feature of the device is a crank core integrally connected in series.

A third feature of the device of the present invention is that the printed circuit board according to the first or second feature of the device has spiral wirings in mutually opposite directions in which spiral currents are generated in multiple layers in the same direction at positions corresponding to both front and back surfaces. It is a printed wiring type electromagnet formed by printing coils respectively.

A fourth feature of the device of the present invention is a printed wiring type electromagnet in which the printed circuit boards according to the first, second or third features of the device are laminated in a volume.

A fifth feature of the device of the present invention is that the spiral wiring coil in the first, second, third or fourth feature of the device is the spiral wiring coil wiring width per winding and the spiral wiring coil. When the sum of winding widths is d and the radius of each core is r,
The printed wiring type electromagnet satisfies the relation that the number of turns n of each spiral wiring coil is n = r / d.

[0020]

Since the present invention has taken the above-mentioned methods and means, the area occupied by the coils is the total number of turns of the coil when the structure is compact and the number of coils is m and the number of turns of each coil is n. can be proportional to nm. In addition, by adopting a multilayer structure for the printed circuit board, the area occupied by the coil can be further reduced.

[0021]

(Embodiment 1) A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a printed wiring type electromagnet showing an example of the present device, and FIG. 2 is a vertical sectional view taken along line II-II of the same.

In the drawing, β is a printed wiring type electromagnet, 9 is a single-sided printed wiring board, and 10a to 10d are spiral wiring coils printed on the surface 9a of the single-sided printed wiring board 9.
Reference numeral 11 is a crank core, 11a to 11d are cores penetrating the centers of the spiral wiring coils 10a to 10d, respectively.
2a to 12d are core through holes through which the cores 11a to 11d pass, and 13a and 13b are spiral coil 1
0a to 10d are connected to both inner and outer ends of the inner and outer solder connecting terminals, and 14a and 14b are adjacent inner solder connecting terminals 13a and the outer solder connecting terminals 13 respectively.
b Jumper wires for electrically connecting each other, 15
Is a jumper wire 14c for connecting the outer solder connection terminals 13b of the spiral wiring coils 10a and 10d arranged on the outermost sides.
It is a power source inserted in.

1 and 2 show a printed wiring type electromagnet β of this embodiment. The printed wiring type electromagnet β of this embodiment
Is a single-sided printed wiring board 9 with the spiral wiring pattern coils 10a to 10d clockwise from the center toward the outside.
A conductive metal is printed on the surface 9a by etching or the like so as to be arranged in a straight line, and the spiral wiring pattern 10a is formed.
Core through holes 12a which are respectively provided at the centers of 10d.
12d to cores 11a to 1 made of a ferromagnetic material such as soft iron
1d is pierced and supported in the vertical direction with respect to the surface of the single-sided printed wiring board 9.

Adjacent spiral wiring coils 10a to 10d are electrically connected in series, and the wiring between the spiral wiring coils 10a to 10d for the connection is connected via inner and outer solder connecting terminals 13a and 13b. The jumper wires 14a and 14b in the figure are used, or a double-sided printed wiring board is adopted in place of the single-sided printed wiring board 9 to form through holes not shown in the drawings, and on the back surface of the double-sided printed wiring board. A configuration such as connection using the formed jumper connection wiring pattern is adopted.

The cores 11a to 11d inserted in the centers of the spiral wiring coils 10a to 10d either penetrate the crank core 11 integrally formed in advance through the single-sided printed wiring board 9 or the cores 11a to 11d. After mounting 11d, the cores 11a to 11d are coupled cores 11e which are magnetic paths for magnetically coupling the parallel ends in a staggered manner in a staggered manner.
The crank core 11 is connected by using ~ 11g.
Furthermore, the spiral wiring coils 10a to 10d per coil turn
When the sum of the wiring width and the spacing between the wirings is d, and the radius of the cores 11a to 11d is r, each spiral wiring coil 10a to 10d
The dimensions of each member are set so that the number of turns n satisfies the relation of n = r / d.

Here, it is optional to form not only the printed wiring type electromagnet β but also various other printed wiring patterns (not shown) on the single-sided printed wiring board 9 on the same substrate, but the description will be given here. Other printed wiring patterns are not shown for the sake of simplicity.

Here, the constitutional principle of the present apparatus example will be described in detail below by using mathematical expressions. When an exciting current I is applied to m spiral wiring coils 10a to 10d each having n turns, the total magnetomotive force H of the printed wiring type electromagnet β of the present invention is H = n.
Expressed as mI. Next, when the total magnetomotive force H is constant, that is, the total number of turns N = nm is constant, the spiral wiring coils 10a to 10d and the core 1 on the surface of the single-sided printed wiring board 9 are formed.
The number of turns n that minimizes the total occupied area Sβ of 1a to 11d is derived.

The total occupied area Sβ is given by (Equation 1). Sβ = mπ (nd + r) ² (Equation 1) In (Equation 1), the number of spiral wiring coils 10a to 10d is m = N.
Substituting / n and differentiating the total occupied area Sβ by the number n of turns, dSβ / dn = Nπ (n ² d ² −r ² ) / n ² .

Here, the condition that the total occupied area Sβ is minimum is dSβ / dn = 0, that is, Nπ (n ² d ² −r ² ) / n ² = 0. By rearranging both sides, n = r / d (Equation 2) is obtained, and the total occupied area Sβ takes the minimum value Sβmin under this condition.

The obtained condition n = r / d is expressed by the above (formula 1).
When the minimum value Sβmin of the total occupied area Sβ is obtained by substituting for, Sβmin = 4Nπrd is calculated.

Next, the occupied areas are compared by using a conventional printed wiring type electromagnet α which generates the same magnetomotive force. In the conventional printed wiring type electromagnet α, if the sum of the wiring width of the spiral wiring coil 2 and the space between the wirings d and the core radius r are made to have the same dimensions as those of this device example, the occupied area Sα is Sα = π It is represented as (Nd + r) ² .

Here, the printed wiring type electromagnet β of this device example is used.
When the minimum value Sβmin of the occupied area Sβ of the above is compared with the occupied area Sα of the conventional printed wiring type electromagnet, Sβmi
While n is proportional to the total number of turns N, Sα includes a control term proportional to N ² which is the square of the total number of turns N. Therefore, as the total number of turns N increases, Sα increases dramatically, and Sβmi
It is proved that the relationship of n << Sα holds.

(Method Example 1) A first method example of the present invention applied to the first apparatus example will be described with reference to FIGS. 1 and 2. First, the outer solder connection terminals 13 of the spiral wiring coils 10a and 10d
When b and 13b are respectively connected to both poles of the power supply 15 through the jumper wire 14c and the exciting current I is passed, the exciting current I is shared by the spiral wiring coils 10a to 10d through the jumper wires 14a and 14b on the way. .

At this time, opposite eddy currents are alternately generated adjacent to each other on the same two-dimensional surface 9a of the printed circuit board 9 centering on the cores 11a to 11d, and the arrows shown in FIG. 2 are applied to the cores 11a to 11d. A magnetic field is generated in the direction, and a magnetic field line that is consistently and continuously common is generated in one direction from the S pole to the N pole along the crank core 11.

(Device Example 2) A second device example of the present invention will be described with reference to the drawings. FIG. 3 is a plan view of a printed wiring type electromagnet showing the present apparatus example, and FIG. 4 is a vertical sectional view taken along line IV-IV of the same.

In the figure, β'is a printed wiring type electromagnet of this apparatus example, 16 is a double-sided printed wiring board, 17a to 17d,
17a 'to 17d' are double-sided printed wiring boards 1
Spiral coil printed on the front and back surfaces 16a, 16b of 6,
18 is a crank core, 18a-18d is a core, 18e-
18g is a connecting core, 20a to 20d are through holes for electrically connecting the spiral wiring coils 17a to 17d, 17a 'to 17d' on the front and back surfaces, 21a and 21b are front and back surfaces 16a and 16b of the double-sided printed wiring board 16, respectively. Solder connection terminals, 22 is a power supply, and 23 is a jumper wire.

3 to 4 show a printed wiring type electromagnet β'of this device example. In this embodiment, a double-sided printed wiring board 16 is used instead of the single-sided printed wiring board 9 used in the first device example, and the spiral wiring coils 17a to 17 are used.
d, 17a ′ to 17d ′ are the double-sided printed wiring board 1
6 are printed on both front and back surfaces 16a and 16b.

The surface 16a of the double-sided printed wiring board 16
When viewed from above, the spiral wiring coils 17a to 17d are wound leftward from the center toward the outside, and the spiral wiring coils 17a '
.About.17d 'are also wound in opposite directions so that they are also right-handed. Spiral wiring coils 17a to 17d and 17a 'to 17d' which are opposite to each other on the double-sided printed wiring board 16.
The two sides are electrically connected to each other by through holes 20a to 20d penetrating the double-sided printed wiring board 16.

Similarly, adjacent spiral wiring coils 17a to 17d, 17 arranged on the same side of the double-sided printed wiring board 16 are provided.
a 'to 17d' every other space between the spiral wiring coils 17
The a to 17d and 17a 'to 17d' are electrically connected to each other in an S-shape by continuously extending the outer peripheral portion, and the spiral wiring coils 17a to 17d and 17a 'to 17d' are connected in series.

Further, similarly to the first device example, the coil 1
Spiral wiring coils 17a to 17d, 17a 'to 1 per winding
7d ′ is the sum of the wiring width and the spacing between the wirings, and the cores 18a to 1
When the radius of 8d is r, each spiral wiring coil 17a
The dimensions of each member are set so that the number of turns n of 17d and 17a 'to 17d' satisfies the relationship of n = r / d of (Equation 2) shown in the first device example.

(Method Example 2) A second method example of the present invention applied to the second device example will be described with reference to FIGS. First, the solder connection terminals 21a and 21d connected to both free ends of the spiral wiring coils 17a and 17d are connected to the power source 22.
When the exciting current I is applied to both poles of the spiral wiring coil 17 through the jumper wires 23, the spiral wiring coils 17a to 17d, 1
7a 'to 17d' are consistently and continuously common, but at that time, the exciting current I is the double-sided printed circuit board 16 front and back surfaces 16a, 16 respectively.
In the same manner as in the first method example, the cores 18a to 18d are rotated in the same direction in the same direction as shown in FIG.
A magnetic field is simultaneously generated on a to 18d.

As a result, the magnetic field generation directions are the same at the corresponding locations on the front and back surfaces 16a and 16b, and magnetic force lines that are consistent and continuous in one direction from the S pole to the N pole are generated along the crank core 18. The magnetomotive force H is doubled as compared with the first embodiment. Also in this case, the minimum value Sβ′min of the occupied area Sβ ′ of the printed wiring type electromagnet β ′ is proportional to the total number of turns N per one surface.

In each of the first and second embodiments, the spiral wiring coils 10a to 10d, 17a to 17d, 17a '.
Although the number m of 17d 'is 4 and 8 respectively, the spiral wiring coils 10a to 10d and 17a to 17 are illustrated.
Even if the number of d, 17a 'to 17d' increases, the spiral wiring coils 10a to 10d, 17a to 17d, 17a 'to 1
As long as 7d ′ are two-dimensionally in the same plane, the number of printed wiring boards 9 and 16 may be one. That is, the spiral wiring coils 10a to 10d, 17a to 17d, 17a 'to
The manufacturing cost of the two-dimensional planar coil does not change even if the number m of 17d 'increases.

Similarly, the printed wiring boards 9 and 16 formed of a single layer are used, but this is used as a multilayer printed wiring board, and the spiral wiring coils 10a to 10d are arranged so that the exciting current I makes multiple layers in the same direction in each layer. , 17a to 17d may be formed by printing, and the generated magnetic field H may be increased in proportion to the number of layers.

[0045]

As described above, by adopting the present invention in the printed wiring type electromagnet, the magnetic drive efficiency is higher while having the same area as compared with the conventional device. Therefore, in addition to the thin structure of the device, Contributes to downsizing and high-density construction. In particular, this effect is remarkable when the number of turns is large, and it is possible to realize an electromagnetic relay or the like that is smaller and has a larger driving force than the conventional one, which is excellent in space. Furthermore, by increasing the number of layers and forming a closed magnetic circuit, the magnetic flux density will be improved, and further miniaturization and high-density construction will be realized.

In addition to this, the manufacturing cost can be suppressed to almost the same level as that of the conventional printed wiring type electromagnet, and the manufacturing cost hardly increases with the increase in the number of coils. Show.

[Brief description of drawings]

FIG. 1 is a plan view of a printed wiring type electromagnet showing a first device example of the present invention.

FIG. 2 is a vertical sectional view taken along line II-II of the above.

FIG. 3 is a plan view of a printed wiring type electromagnet showing a second device example of the present invention.

FIG. 4 is a vertical sectional view taken along line IV-IV of the same.

FIG. 5 is a plan view showing a conventional printed wiring type electromagnet.

FIG. 6 is a vertical sectional view taken along line VI-VI of the above.

[Explanation of symbols]

 α, β, β '... Printed wiring electromagnet 1 ... Double-sided printed wiring board 2 ... Spiral wiring coil 3 ... Core 4 ... Core through hole 5 ... Through hole 6 ... Connection wiring pattern 7 ... Power supply terminal 8 ... Power supply 9 ... Single-sided printed wiring board 9a ... Front surface 10a-10d ... Spiral wiring coil 11 ... Crank core 11a-11d ... Core 11e-11g ... Connecting core 12a-12d ... Core through hole 13a, 13b ... Inner / outer solder connecting terminal 14a-14c, 23 ... Jumper wire 15 ... Power source 16 ... Double-sided printed wiring board 16a ... Front surface 16b ... Back surface 17a to 17d, 17a 'to 17d' ... Spiral wiring coil 18 ... Crank core 18a to 18d ... Core 18e to 18g ... Connection core 19a to 19d ... Core Through holes 20a to 20d ... Through holes 21a, 21b ... Solder connection terminals 22 ... Power supply

Claims (9)

[Claims] 1. A spiral eddy current is generated two-dimensionally on the same plane and adjacently alternately with respect to each core in which parallel core ends are alternately and serially connected in series, and the core groups are consistently and continuously shared in one direction. An electromagnet magnetization method characterized in that magnetic lines of force are generated. 2. The electromagnet magnetization method according to claim 1, wherein the reverse spiral current groups are consistently and continuously generated. 3. The electromagnet magnetization method according to claim 1, wherein each of the backward spiral currents is generated in the same direction in each of the multilayer planes. 4. The electromagnetization method according to claim 1, wherein the reverse spiral current group is generated via a spiral wiring coil group printed on a printed circuit board by a single power source. . 5. A printed circuit board on which a plurality of spiral wiring coils are printed, and a core group in which parallel core ends projecting through the centers of the respective spiral wiring coils are staggered alternately in series in series through appropriate magnetic paths. A printed wiring type electromagnet, comprising: 6. The printed wiring type electromagnet according to claim 5, wherein the core group is a crank core integrally connected in series. 7. A printed circuit board is provided on each of the front and back sides corresponding to each other.
The printed wiring type electromagnet according to claim 5 or 6, wherein spirally wound coil coils having mutually opposite directions in which spiral currents are layered in the same direction are printed. 8. The printed wiring type electromagnet according to claim 5, 6 or 7, wherein the printed circuit boards are stacked in multiple layers in a volume. 9. The spiral wiring coil group is configured such that the sum of the spiral wiring coil wiring width and the spiral wiring coil winding width per winding is d,
9. The printed wiring type electromagnet according to claim 5, wherein the number of turns n of each spiral wiring coil satisfies a relationship of n = r / d, where r is the radius of each core.