JP2001126929A - Noncontact type transformer and signal repeater for vehicle using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device with high transmission efficiency concerning a noncontact type transformer for repeating electrical signal transmission and power supply. SOLUTION: For the noncontact type transformer, having concentric annular winding wires 12 and 15 more than one at least respectively on the mutually confronted surfaces of a pair of disk-shaped magnetic substance cores 11 and 14, holders 13 and 16 composed of resins containing soft magnetic materials are added to the respective confronted surfaces of a pair of the magnetic substance cores 11 and 14, and these annular winding wires 12 and 15 are embedded in grooves formed on these holders 13 and 16 or in there holders 13 and 16, so that the noncontact type transformer of high transmission efficiency can be provided. Moreover, the noncontact type transformer is housed in the handle part for driving of a vehicle, so that the signal repeater for transmitting electric signals or supplied power can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a non-contact type transformer mounted on a shaft of a driving handle of an automobile and transmitting an electric signal and supplying power to the handle. The transmission efficiency of signals and power is improved.

[0002]

2. Description of the Related Art A large number of vehicles having an air conditioner and a cruise control function (a system capable of running at a speed set by a driver) have been sold in a number of automobiles that have become very popular worldwide. Most of the electrical systems required to operate these functions have conventionally been concentrated near the front panel of a car or near the base of a driving handle. For this reason, when the driver operates these functions, it is necessary to temporarily release one hand from the steering wheel, which could lead to an accident, especially when driving at high speeds, etc. .

[0003] In order to improve this point, in recent years, the grip portion of the driving handle is provided with a control switch of an electrical system necessary for operating these functions, and it is necessary to release the hand from the driving handle even when operating the function. There are no cars with safety in mind. In these vehicles, the electric signal transmission and the electric power supply to the control switch installed on the driving handle adopt a wired method in which electric wires are used, and the electric wires are not broken by the rotating operation of the driving handle. As described above, a flexible special wire having spring properties is used.

FIG. 3 is a schematic diagram showing the configuration of these wired wires. This is formed by forming a cable in which a plurality of wires are arranged in parallel into a spring shape, and includes a flat cable 31 and a flat cable mounting electrode 32.
Even when the operating handle is rotated, the wire is not tensioned and does not break. However, the actual work of installing this wire requires the right and left rotating stress to be applied to the driver when operating the steering wheel, and the installation must be performed with the driving handle in the neutral position. It takes time to work. In addition, since the wires rub against each other due to the rotation operation of the driving handle during use, the life of the product is shortened, and a sound generated when the wires rub, and a slight amount of the wire derived from the wire felt when operating the handle. There is a drawback that the comfort of driving operation is impaired due to the feeling of resistance.

[0005]

SUMMARY OF THE INVENTION For the purpose of relaying the transmission of electric signals and the supply of electric power to a driving handle of an automobile,
The problems of the conventional method using the wire type wire are solved by a new method adopting a wireless transmission method. That is, this is a method of supplying power and transmitting signals by an electromagnetic induction method using a non-contact type transformer made of a soft magnetic material. This method is proposed in the specification of Japanese Patent Application No. 11-168082 "Non-contact type transformer".

FIG. 4 shows a top view of a non-contact type transformer proposed in the specification and FIG. 4B and FIG. As shown in FIG.
The non-contact type transformer has a structure in which two magnetic cores 41 and 43, which are disk-shaped soft magnetic materials, are opposed to each other, and annular coils 42 and 44 are formed on the opposed surfaces. The magnetic sleeve 45, which is a cylindrical soft magnetic material and located outside the two magnetic cores 41 and 43, forms a part of a magnetic circuit and serves as a guide for the magnetic cores 41 and 43. It also has functions.

Here, the magnetic cores 41 and 43 located at positions facing each other need to be completely in non-contact with each other at all times. When considering the close approach, it is necessary to provide a margin called “play” between the magnetic cores 41 and 43, and as a result, the space between the annular windings 42 and 44 at the time of design is Can not be narrow. For this reason, there has been a problem that transmission efficiency in relaying transmission of electric signals and power supply is low. Therefore, it is necessary to provide a magnetic sleeve for enhancing magnetic coupling on the inner or outer peripheral portion of the non-contact type transformer. In the conventional example shown in FIG. 4, the magnetic sleeve 45 is provided only on the outer peripheral portion. However, this solution also has its limitations.

[0008] Accordingly, an object of the present invention is to provide a non-contact type transformer with further improved transmission efficiency in power supply and signal transmission. Another object of the present invention is to provide a vehicular signal relay device having excellent power and signal transmission efficiency by housing the non-contact type transformer in a driving handle portion of an automobile.

[0009]

A non-contact type transformer according to the present invention has a shape in which at least one or more concentric annular windings are respectively provided on mutually facing surfaces of a pair of disk-shaped magnetic cores. A holder made of a resin containing a soft magnetic material is provided on opposing surfaces of the pair of magnetic cores.

A holder made of a resin containing a soft magnetic powder has both magnetic properties, that is, soft magnetism, and properties of a resin, that is, moldability. By the way, in the conventional example shown in FIG. 4, the existence of the concentric annular winding which must be installed on the opposing surface of the magnetic core is necessary because the two magnetic cores are brought close to each other to improve the transmission efficiency of the non-contact type transformer. It is an impediment to improving the quality. In order to solve this problem, the soft magnetic powder is contained in a space where there is no annular winding between the magnetic cores, leaving a small gap necessary for maintaining non-contact between the two magnetic cores. By covering both opposing surfaces of the magnetic core with the resin, the transmission efficiency of the non-contact type transformer can be improved.

[0011] Further, by accommodating the non-contact type transformer in a driving handle portion of a vehicle for relaying an electric signal or power, a signal relay device for a vehicle having high transmission efficiency of the signal and the power is obtained. Can be.

That is, according to the present invention, a pair of disk-shaped magnetic cores are opposed to each other, and each of the opposed surfaces has at least one or more concentric annular windings. A non-contact type transformer provided with a holder made of a resin containing a soft magnetic material on each of the opposing surfaces.

[0013] The present invention also relates to the present invention, wherein one or more concentric grooves are provided in the holder made of a resin containing a soft magnetic material provided in each of the pair of disk-shaped magnetic cores. This is a non-contact type transformer characterized by the installation of wires.

Further, according to the present invention, at least one concentric annular winding is embedded in each of the pair of disk-shaped magnetic cores made of a resin containing a soft magnetic material. A non-contact type transformer characterized by the following.

Further, the present invention is characterized in that a cylindrical or pot-shaped magnetic sleeve is provided on at least one or both of an outer peripheral portion and an inner peripheral portion of the pair of disk-shaped magnetic cores. It is a contact type transformer.

Further, the present invention is a non-contact type transformer characterized in that the pair of disk-shaped magnetic cores is made of a metal soft magnetic material or soft ferrite.

Further, according to the present invention, the holder made of a resin containing a soft magnetic material provided on each of the pair of disk-shaped magnetic cores is made of a soft magnetic material made of Ni-Zn or Ni-Zn-Cu ferrite. A non-contact type transformer comprising magnetic powder and nylon resin.

Further, according to the present invention, the holder made of a resin containing a soft magnetic material, provided on each of the pair of disk-shaped magnetic cores, contains 50 to 70% of the soft magnetic powder and the remaining amount of the resin. A non-contact type transformer characterized by being mixed at a ratio by volume.

The present invention is also a signal relay device for a vehicle, wherein the non-contact type transformer is housed in a driving handle of a vehicle.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

In the non-contact type transformer according to the present invention, soft magnetic powder is contained in the vicinity of the annular windings respectively provided on the opposing surfaces of the pair of disk-shaped magnetic cores, and the molding is easy. The transmission efficiency is improved by providing a holder made of resin, forming a groove therein, and installing the annular winding therein. Alternatively, a similar result can be obtained by providing a holder having a configuration in which the annular winding is filled with the resin and buried on the opposing surface of the magnetic core, and the annular winding is formed using the resin as a raw material. A method of creating and using a bobbin for fixing may be used. If necessary, the holder may be formed with some grooves orthogonal to the concentric grooves. This groove is used for taking out a terminal from the annular winding.

FIG. 1 shows a cutaway view of an embodiment of the non-contact type transformer according to the present invention. The non-contact type transformer includes annular windings 12 and 15, holders 13 and 16 made of a resin containing a soft magnetic material and provided with concentric grooves for accommodating the annular windings 12 and 15, respectively. Magnetic core 1
1 and 14. In this embodiment, magnetic steel plates are used as the magnetic cores 11 and 14.

In the embodiment shown in FIG.
6 must be a material that can insulate between the annular windings 12 and 15 and the disk-shaped magnetic cores 11 and 14, and therefore, a material belonging to a soft ferrite having a high specific resistance. It is more preferable to use Ni-Zn-based ferrite or Ni-Zn-Cu-based ferrite having higher specific resistance among soft ferrites. The holder 1 is mixed with the soft magnetic material.
The resin constituting 3 and 16 can be either a thermoplastic resin or a thermosetting resin, but in consideration of strength, ease of molding, and heat resistance, nylon resin which is a thermoplastic resin is used. Is preferred.

When the proportion of the soft magnetic powder constituting the holders 13 and 16 increases, the magnetization increases and the transmission efficiency of the non-contact type transformer increases.
The moldability of the resin decreases. Therefore, the mixing ratio when forming the holder is preferably such that the soft magnetic powder has a volume ratio of 50 to 70% and the resin has a remaining amount (50 to 30%). Various soft magnetic materials can be used for the disk-shaped magnetic core, and the material is selected according to the frequency of the electric signal to be transmitted and the supply power. When the power and the signal transmitted by the non-contact type transformer are of low frequency, a metal soft magnetic material is generally used, and when the power and signal are of high frequency, soft ferrite is preferably used.

In order to further improve the transmission efficiency of the non-contact type transformer, it is effective to use a magnetic sleeve in combination. The magnetic material sleeve can be installed on the inner peripheral portion and / or the outer peripheral portion of the magnetic core, respectively, and often takes a cylindrical or pot-like shape.

FIG. 2 shows an embodiment of a non-contact type transformer having a magnetic sleeve. In the embodiment, a magnetic sleeve 24 installed on an inner peripheral portion of a magnetic core 21 installed at a lower portion, and a magnetic sleeve 28 installed on an outer peripheral portion of a magnetic core 25 installed on an upper portion, respectively. The magnetic coupling is particularly improved at the outermost and innermost portions of the annular windings 22 and 26 which are fixed, and the transmission efficiency of the electric signal to be transmitted and the supplied power is improved. Is obtained.

Next, embodiments of the present invention will be described in detail.

(Example 1) A non-contact type transformer according to the present invention having the shape of the example shown in FIG. 1 was manufactured by the following configuration and method. The disc-shaped holders 13 and 16 are made of Ni-Z
A sintered body of n ferrite is pulverized to an average particle size of 20 μm or less to prepare a soft magnetic powder, and a raw material obtained by adding the powder at a rate of 60 vol 1% and a nylon resin powder at a rate of 40 vol 1% is subjected to a pressure kneader (kneading apparatus). And injection molding.

Similarly, disk-shaped magnetic cores 11 and 14
Are holders 13 and 16 made of magnetic steel plate and injection-molded.
And bonded to each other. In the attachment of the two, the two may be formed in an uneven shape and may be mechanically joined without using an adhesive. In addition, the installed annular winding 1
The number of 2, 15 is set to 4 in consideration of the supply power and the type of signal to be transmitted.
Are formed with four concentric grooves for accommodating the annular windings 12 and 15 at the time of injection molding. In Example 1, the innermost one of the four annular windings was used for power supply, and the other three windings were used for signal transmission. The distance between the upper and lower holders 13 and 16 is common to each of the annular windings, and is 3 mm. Also, the holders 13 and 1
In FIG. 6, grooves are formed at a total of four locations orthogonal to the concentric grooves in order to take out terminals from the annular windings 12 and 15.

Using the produced non-contact type transformer, the transmission efficiency of the supplied power was actually measured for the innermost peripheral power supply annular winding. The input power is 12V / 15W and the frequency generated by the function generator is 125kHz.
Sinusoidal current was input. When the output was measured by a spectrum analyzer, an output power of 8 W was obtained.

As a comparative example, a non-contact type transformer having the same configuration as that of the first embodiment was manufactured under the same conditions with respect to the magnetic core and the annular winding by molding the holder only with nylon resin. evaluated. As a result, the output power was 6 W with respect to the input of the sine wave current under the same conditions as above, and the superiority of the non-contact type transformer of the embodiment of the present invention was proved.

(Embodiment 2) A non-contact type transformer having the shape of the embodiment shown in FIG. 2 according to the present invention comprises a magnetic sleeve made of a magnetic steel sheet on the inner and outer circumferences of the non-contact type transformer shown in Embodiment 1. Are respectively added. As a result of evaluation under the same conditions as in Example 1, an output power of 10 W was obtained. From this, it was found that the transmission efficiency was further improved by adding the magnetic sleeve as a component to the non-contact type transformer as compared with the non-contact type transformer shown in the first embodiment.

The position of the power supply annular winding in the non-contact type transformer is not limited to only the innermost circumference of the annular winding as in the first and second embodiments. For example, the annular winding disposed on the outermost periphery or the second or third annular winding from the inside may be used. Further, the number of annular windings provided in the non-contact type transformer is not limited to four. Also,
Similarly, the magnetic sleeve provided in the non-contact type transformer having the shape of the second embodiment may have any shape as long as the basic shape is cylindrical or pot-shaped.

[0034]

According to the present invention, it is possible to obtain a non-contact type transformer including at least one or more concentric annular windings on the mutually facing surfaces of a pair of disk-shaped magnetic cores. In the non-contact type transformer, it was confirmed that the transmission efficiency in power supply and signal transmission was improved by installing a holder made of a resin containing a soft magnetic material on the facing surfaces of the pair of magnetic cores. .

Further, by accommodating the non-contact type transformer as a relay device for power supply and signal transmission in a driving handle portion of an automobile, a signal relay device for a vehicle having excellent power and signal transmission efficiency can be obtained. Can be

[Brief description of the drawings]

FIG. 1 is a view showing an example of the arrangement of components in a non-contact type transformer according to the present invention.

FIG. 2 is a view showing an example of the arrangement of each component in a non-contact type transformer having a configuration different from that of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of a configuration of a conventional wired wire.

FIG. 4 is a diagram showing an example of an arrangement configuration of each component of a non-contact type transformer proposed in the specification of Japanese Patent Application No. 11-168082 “Non-contact Type Transformer”. FIG. 4A is a top view of the magnetic core, and FIG. 4B is a diagram showing a cut surface of the magnetic core taken along a dashed line AA in FIG. 4A.

DESCRIPTION OF REFERENCE NUMERALS 11 magnetic core 12 annular winding 13 holder 14 magnetic core 15 annular winding 16 holder 21 magnetic core 22 annular winding 23 holder 24 magnetic sleeve 25 magnetic core 26 annular winding 27 holder 28 Magnetic sleeve 31 Flat cable 32 Flat cable mounting electrode 41 Magnetic core 42 Annular winding 43 Magnetic core 44 Annular winding 45 Magnetic sleeve

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01F 27/26 H01F 15/02 R

Claims (8)

[Claims] 1. A pair of disk-shaped magnetic cores oppose each other, and each of the opposing surfaces has at least one or more concentric annular windings, and each opposing surface of the pair of magnetic cores is provided. A non-contact type transformer provided with a holder made of a resin containing a soft magnetic material. 2. A holder made of a resin containing a soft magnetic material provided on each of a pair of disk-shaped magnetic cores,
2. A non-contact type transformer according to claim 1, wherein at least one concentric groove is provided and each of said annular windings is provided. 3. A holder made of a resin containing a soft magnetic material provided on each of the pair of disk-shaped magnetic cores,
2. The non-contact type transformer according to claim 1, wherein at least two concentric annular windings are embedded. 4. A structure in which a cylindrical or pot-shaped magnetic sleeve is provided on at least one or both of an outer peripheral portion and an inner peripheral portion of the pair of disk-shaped magnetic cores. The non-contact type transformer as described. 5. The non-contact type transformer according to claim 1, wherein the pair of disk-shaped magnetic cores is made of a soft metal material or soft ferrite. 6. The holder made of a resin containing a soft magnetic material provided on each of the pair of disk-shaped magnetic cores,
6. A non-contact type transformer according to claim 1, wherein said non-contact type transformer is made of a soft magnetic powder of i-Zn or Ni-Zn-Cu ferrite and a nylon resin. 7. The holder made of a resin containing a soft magnetic material and provided on each of the pair of disk-shaped magnetic cores has a volume ratio of 50 to 70% of soft magnetic powder and the remaining amount of resin. 7. The non-contact type transformer according to claim 1, wherein the non-contact type transformer is mixed. 8. A signal relay device for a vehicle, wherein the non-contact type transformer according to claim 1 is housed in a driving handle of the vehicle.