JP2002231545A - Non-contact power supply - Google Patents

Abstract

(57) [Problem] To provide a non-contact power supply device with good magnetic coupling between primary and secondary coils. SOLUTION: In a non-contact power supply device comprising a primary coil 1 and a secondary coil 3, an annular conductor 2 is provided on the outer periphery of the primary coil 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact power supply device utilizing electromagnetic induction, such as a cordless telephone for home use, a portable telephone, a small portable device such as a PHS and a PDA.

[0002]

2. Description of the Related Art FIG. That is, the primary coil 1 mounted inside the charger body case for supplying power, and the primary coil 1 outside the charger body case.
The secondary coil 3 receives power from the secondary coil 1.

[0003]

Among the magnetic fluxes generated from the primary coil 1 through a distance (gap), the magnetic flux amount that the secondary coil 3 can receive is small and high output cannot be obtained. Met.

Therefore, in order to obtain a high output, of the magnetic flux generated from the primary coil 1 through a distance (gap),
The problem was how to increase the amount of magnetic flux that the secondary coil 3 can receive.

[0005]

In order to solve the above-mentioned problems, the present invention increases the amount of magnetic flux that can be received by the secondary coil by providing an annular conductor on the primary coil. .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a primary coil mounted inside a charger main body case for supplying electric power, and the primary coil outside the charger main body case. In a non-contact power supply device comprising a secondary coil receiving electric power from a coil, an annular conductor is provided on the outer periphery of the primary coil, and the secondary coil includes a magnetic flux generated from the primary coil. Since the amount of magnetic flux that can be received by the coil can be increased, and the magnetic coupling between the primary coil and the secondary coil can be improved, there is an effect that a high output can be obtained.

According to a second aspect of the present invention, since an annular conductor having a top opening and a bottom opening having the same size is provided on the outer periphery of the primary coil, a magnetic flux generated from the primary coil is provided. Of these, the amount of magnetic flux that can be received by the secondary coil can be increased, and the magnetic coupling between the primary coil and the secondary coil can be improved, so that high output can be obtained.

According to the third aspect of the present invention, an annular conductor whose top opening is smaller than the bottom opening is provided on the outer periphery of the primary coil. Even if the conductor is moved away from the primary coil, the amount of magnetic flux that can be received by the secondary coil can be increased, and the magnetic coupling between the primary coil and the secondary coil can be improved. Is obtained.

According to a fourth aspect of the present invention, an annular conductor whose top opening is smaller than the bottom opening and whose top opening is curved is provided on the outer periphery of the primary coil. 3, the amount of magnetic flux that can be received by the secondary coil can be increased even if the annular conductor is moved away from the primary coil, from the primary coil to the secondary coil. Since the magnetic coupling between them can be improved, a high output can be obtained.

According to a fifth aspect of the present invention, the annular conductor is provided only on the outer periphery of the power supply winding of the primary coil.
Of the magnetic flux generated from the secondary coil, the amount of magnetic flux that can be received by the secondary coil can be increased, and the magnetic coupling between the primary coil and the secondary coil can be improved. It has the effect of being obtained.

According to a sixth aspect of the present invention, since an annular conductor is provided on the outer periphery of the power supply winding and the auxiliary winding of the primary coil, of the magnetic flux generated from the primary coil, the secondary side Since the amount of magnetic flux that can be received by the coil can be increased and the magnetic coupling between the primary side coil and the secondary side coil can be improved, there is an effect that a high output can be obtained.

(Embodiment 1) As shown in FIG. 1, in this embodiment, a primary side coil 1 mounted inside a charger main body case (not shown) for supplying electric power, and the charger main body case In a non-contact power supply device including a secondary coil 3 for receiving power from the primary coil 1 outside, an annular conductor 2 is provided on the outer periphery of the primary coil 1.

More specifically, on the outer periphery of the power supply winding 6 of the primary coil 1, an annular conductor 2 having a top opening 4 and a bottom opening 5 of the same size and at least 1T is provided. And the amount of magnetic flux that can be received by the secondary coil 3 out of the magnetic flux generated from the primary coil 1 can be increased, and the magnetic coupling between the primary coil 1 and the secondary coil 3 can be increased. Therefore, high output can be obtained. In FIG. 1, reference numeral 8 denotes a gap, below which the charger main body case is located, and above which is the various equipment side.

(Embodiment 2) FIG. 2 shows a configuration in which the top opening 4 of the annular conductor 2 is made smaller than the bottom opening 5 so as to reduce the magnetic flux so as to move toward the secondary coil 3 side. .

(Embodiment 3) FIG. 3 shows a case where the top opening 4 of the annular conductor 2 is smaller than the bottom opening 5, and the top opening 4 is curved. The same effect as in the second embodiment can be obtained.

(Embodiment 4) FIG. 4 shows that the top opening 4 and the bottom opening 5 have the same size on the outer periphery of the power supply winding 6 and the auxiliary winding 7 of the primary coil 1 and have at least 1T. The above-described annular conductor 2 is provided, and an effect similar to that of the first embodiment can be obtained.

(Embodiment 5) FIG. 5 shows an outer periphery of the power supply winding 6 and the auxiliary winding 7 of the primary coil 1 in which the top opening 4 is smaller than the bottom opening 5 and has an annular shape of at least 1T or more. Since the mold conductor 2 is provided, the same effect as in the second embodiment can be obtained.

(Embodiment 6) FIG. 6 shows that the top opening 4 is smaller than the bottom opening 5 on the outer periphery of the power supply winding 6 and the auxiliary winding 7 of the primary coil 1, and the top opening is 4 is provided with an annular conductor 2 having a curved shape, and an effect similar to that of the third embodiment can be obtained.

[0019]

As described above, according to the present invention, since the annular conductor is provided on the outer periphery of the primary coil, the amount of magnetic flux received by the secondary coil can be increased. Since the magnetic coupling between the secondary coil and the secondary coil can be improved, a high output can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram according to a sixth embodiment of the present invention.

FIG. 7 is a configuration diagram of a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 primary coil 2 annular conductor 3 secondary coil 4 opening on top of annular conductor 5 opening on bottom of annular conductor 6 primary coil power supply winding 7 primary coil auxiliary winding 8 gap

Claims (6)

[Claims] 1. A non-contact type comprising: a primary coil mounted inside a charger main body case for supplying electric power; and a secondary coil receiving electric power from the primary coil outside the charger main body case. A non-contact power supply device, wherein an annular conductor is provided on an outer periphery of a primary coil in the power supply device. 2. The non-contact power supply device according to claim 1, wherein an annular conductor having the same size as the top opening and the bottom opening is provided on the outer periphery of the primary coil. 3. The non-contact power supply device according to claim 1, wherein an annular conductor whose top opening is smaller than the bottom opening is provided on the outer periphery of the primary coil. 4. The primary coil according to claim 1, wherein an annular conductor having a top opening smaller than the bottom opening and a curved top opening is provided on the outer periphery of the primary coil. Non-contact power supply. 5. The non-contact power supply device according to claim 2, wherein the annular conductor is provided only on the power supply winding. 6. The non-contact power supply device according to claim 2, wherein the annular conductor is provided on the power supply winding and the auxiliary winding.