JPS63116413A - Power transmission apparatus - Google Patents

Abstract

PURPOSE:To transmit power supplied to a primary winding without plug to a secondary winding by making a power supply approach or contact a power receiver provided integrally with a load. CONSTITUTION:A power supply (a) is made to approach or contact a power receiver (b) to form a closed magnetic path in which first and second cores 2, 6 penetrate primary and secondary windings 1, 5 to operate the same as a transformer. Accordingly, power supplied to the winding 1 is transmitted to the winding 5, and supplied to a load (c). When the areas of the opposed surfaces 8b, 9b of the cores 2, 6 are increased larger than the sectional areas of the position 2a, 6a of the cores 2, 6 on which the windings 1, 5 are wound, respectively, sufficient power transmission can be performed unless the opposed surfaces 8b, 9b of the cores 2, 6 are contacted with one another when the power supply (a) is made to approach or contact the power receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a power transmission device, particularly a power source side and a load side, which can be mechanically separated and detached very easily, and which also improves the external appearance of the device. The present invention relates to a power transmission device capable of

[Conventional technology]

Traditionally, power has been supplied to various electric and electronic devices such as portable rechargeable electronic devices such as electric beard trimmers and electric water heaters.
This was done by inserting an AC plug provided on the device into a power outlet, or using an AC adapter and inserting a DC plug provided on the AC adapter into an input terminal provided on the device.

However, it is extremely troublesome to have to insert a plug each time the device is used.

In addition, for example, in the case of an electric water heater, when the user lifts the water heater and pours the hot water inside, the power cord is also lifted along with the plug, causing inconveniences such as the power cord getting in the way.

Furthermore, the device has the disadvantage that it is unsightly because the plug protrudes and a hole for inserting the plug is required.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above-mentioned prior art, and it is possible to mechanically separate the power supply side and the load side very easily without providing a plug or the like on the load side, and it is possible to mechanically separate the power supply side and the load side, and it is possible to easily separate the power supply side and the load side. It is an object of the present invention to provide a power transmission device that does not require any trouble when supplying power to an electric/electronic device and can also improve the appearance of the electric/electronic device.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a power supply unit including a core having a primary winding around which an AC voltage is input, and a secondary winding connected to a load. equipped J'
2 cores and a power receiving part 75 that is separated from the power supply part and integrated with the load, and when the power supply part and the power reception part are brought close to each other or in contact with each other, The first core and the second core form a closed magnetic path passing through the primary winding and the secondary winding. In addition, the area of each opposing surface of the first core and the second core is calculated as the cross-sectional area of the portion of the core of the fang 1 where the primary winding is wound and the secondary winding of the second core. is larger than the cross-sectional area of the wrapped part.

[For production]

According to the present invention, when the power supply section and the power reception section are brought into close proximity or in contact with each other, the first core and the 1-2 cores form a closed magnetic path passing through the primary winding and the secondary winding. Therefore, these have the same function as a transformer.

Therefore, the power supplied to the primary winding is transmitted to the secondary winding and supplied to the load.

In the present invention, the area of each opposing surface of the first core and the second core is defined as the cross-sectional area of the part where the primary winding of the first core is wound and the secondary winding of the core of the fang 2. By making the cross-sectional area larger than the area around which the wire is wound, when the power supply part and the power reception part are brought close to each other or in contact with each other, the opposing surfaces of the core of 1 year old 1 and the core of tusk 2 do not come into contact with each other. Even if a gap occurs between the two, since the magnetic resistance due to the gap is small, the magnetic resistance of the closed magnetic path as a whole becomes sufficiently small, and power transmission characteristics sufficient for practical use can be obtained.

As described above, according to the present invention, electric power can be transmitted to the load simply by bringing the power supply section and the force receiving section integrated with the load into close proximity or in contact with each other. It is extremely convenient to use electrical and electronic equipment without the hassle of plugging in each time as in the past.

Furthermore, since there is no need to provide a plug or a plug insertion hole for the electrical/electronic equipment that serves as a dual load, the appearance of the equipment also improves.

〔Example〕

The present invention will be explained below based on an embodiment shown in one drawing.

In Figure 1, (a) is a power supply section, (75) is a power receiving section, and (C) is various electrical and electronic devices as loads.

In the present invention, the power supply section (a) is configured to include a first core (2) around which a primary winding (1) to which an alternating current voltage is input is wound.

In the case of the embodiment shown in Fig. 1, the power supply section ←) is provided with an AC power supply circuit (3) that outputs an AC voltage, and the primary winding (1) is connected to its output terminal. . In addition,
Although various alternating current voltages can be input to the primary winding 1111, it is desirable to input a high frequency voltage of about 3QKH2 to 100xHz. This is because advantages such as being able to reduce the number of turns of the winding wire can be obtained. In addition, in Figure 1 (
4) is a coil bobbin.

Further, the power receiving section (b) is configured to include a second core (6) around which a secondary winding (5) connected to the load (C) is wound, and the power supply section (a) The above load (
C).

In the present invention, when the power supply section (a) and the power reception section (b) are brought close to each other or in contact with each other, the core (2) of the fang 1 and the core 16 of the fang 2 are connected to the primary winding. (1) and a configuration in which a closed magnetic path passing through the secondary winding (5) is formed. Note that (7) in Figure 1 is a coil bobbin.

In the case of the spear I embodiment, the core (2) of the spear I is constructed by preparing two core pieces (8) shown in the second diagram and joining them together at their mating surfaces (8a). 6) Opposite surface (8
b) is located near the outer surface of the casing of the power supply unit (α). In addition, for the core (6) of fang 2, prepare two core pieces (9) shown in spear 3, and use their mating surfaces (9α).
The face facing the core (2) of the 1 year old 1 is made up of 1 year old 1 year old 1 year old core (2).
96) is arranged so that it is located near the outer surface of the housing, and the power receiving part (b) provided on the body is connected to the load (C).
is placed on the power supply part (cL), the first core (2) and the second core (6) are connected to each other through the gap between the opposing surfaces (8 and (9)). Core (2) and 1
72 cores (6) form a closed magnetic path passing through the primary winding, wire (1) and secondary winding (5).

However, the opposing surfaces (8A] and (9z) of the core (2) of fang 1 and the core (6) of j. (α), the opposing surfaces (8b) and (9h) come into contact with each other, and the core (2) of the fang l and the second core (6 are closed and magnetized) without intervening the cap. In fact, this is preferable from the viewpoint of power transmission characteristics, since the magnetic resistance of the closed magnetic path is smaller than the case where the closed magnetic path is formed through the gap.

However, as in the example of the tooth 1 diagram above, the core of the fang 1 (
2) and the second core (6) are not exposed from the outer surface of the housing so that the first core (2) and the second core (6) form a closed magnetic path through the gap. By doing so, the appearance of various electrical and electronic devices, which are loads (C), will be better. Further, even if a closed magnetic path is formed through the gap in this way, in the present invention, as shown in the first diagram, each opposing surface (sA) of the first core (2) and the second core (6) (
(J5) is the area of the primary winding (1) of the first core (2).
Since the cross-sectional area of the part C2α) where is wound is larger than the cross-sectional area of the part where the secondary winding (5) of the core (6) of M-2 is wound (we), due to the gap Since the magnetic resistance is reduced by 7 J's, the magnetic resistance of the entire closed magnetic path can also be made sufficiently small, and practically sufficient power transmission characteristics can be obtained.

Regarding this point, the inventor of the present invention conducted basic experiments shown in Figures 4 to 8. Figure 4 shows the circuit diagram used in this experiment. In the same figure, (2) is the core of the first core of the present invention (2) K is the core of the experimental fang 1, 0◇ is the experimental primary winding wound around this, and the wire is the experimental primary winding. A second experimental core (c) corresponds to the core (6) of the fang 2 of the present invention facing the first core (a), and (c) is an experimental secondary winding wound around this; In order to obtain experimental data, the core shown in Fang 6 (Fig. ) was used. The core (to) shown in Fang 6 has an S/ of its opposing surface (3() of 31], the area S2 of its opposing surface (31α) is 10
．． 8X 30=324 (rrm), and the cross-sectional area S3 of the other part is 4.7x 10-47, which is the same as the above area S/.
(rtrj). In addition, the above experimental primary winding 01
) is a 0.4φ copper wire wound at 80T, and the experimental secondary winding (c) is a 0.2φ copper wire wound at 160T. Furthermore, in Fang 4 diagram, (40) is DC
! 4V DC power supply, (41) is a capacitor, (42)
(43) (44) (45) are resistors, (4 is a transistor), and one end of the capacitor (41) is connected to an input voltage θ,n which is a rectangular wave with a frequency of I KHz as shown in the figure.
was applied, and the transistor (46) was turned ON10 FF in response to this input voltage θin VG. Then, with respect to this input voltage E, an output voltage e having a waveform as shown in the figure is generated. tLt was obtained. The output voltage e. Of u and t, the positive voltage is e/ and the negative voltage is 02, and the opposing surface ('22C) of the core (2) of the above experimental and tl and the experimental J
- The experimental data shown in Figure 8 was obtained by variously changing the gap 1 between the core (C) of No. 2 and the opposing surface (26α). For example, using the core diagram shown in Figure 6 for both the experimental first core (a) and the experimental world second core (c), the gap 1
If Q, 3ztx is used, an "out" of e/ is 5.2V and eco is 11.2V is obtained, and as for the experimental first core (a) and experimental child 2 core) In both cases, the gap f is set to 0.
In the case of 6 mm, it was confirmed that θout of 22 V was obtained with e of 5.2 μ, and that almost the same eotbt was obtained in both cases. That is, according to the above experiment,
Even if the gap 1 becomes wider, the opposing surfaces (22α) (26
The area of It was confirmed that the power transmission characteristics were improved by making the cross-sectional area of the winding (A) larger than that of the portion (26A) around which it was wound.

In addition, in the case of the embodiment in FIG. 1, the first core (2) and the fang 2
The shape of the core (6) is approximately U-shaped,
When the power supply part (α) and the power reception part (5) are brought into close proximity or in contact with each other, the first core (2) and the core (6) of the fang 2 are connected to the primary winding (1) and the secondary winding. A closed magnetic path passing through (5) may be formed, and other shapes may be used, for example, an E-shape.

In addition, in the case of the embodiment shown in FIG. 1, the area of the facing surface (8h) of the core (2) of the spear 1 is larger than the area of the facing surface (96) of the second core (6), and the power supply section (Even if a positional shift occurs when the aJ and the power receiving part (6) are brought close to each other or in contact with each other, the required power can be transmitted.On the contrary,
The same effect can be achieved even if the area of the opposing surface (9z) of the second core (6) is made larger than the area of the opposing surface (9) of the second core (2). 2) and the second core (
6) may be used interchangeably. Note that if the area of the facing surface (86) of the first core (2) and the area of the facing surface C96 of the second core (6) are made larger than the area sufficient to perform the required power transmission, the same area can be achieved. But, for example, Fang 2
By using the same core (6) as the core (8) shown in FIG. 1, the required power transmission can be carried out even if the above-mentioned positional deviation occurs. Of course, it is also possible to take measures such as providing a positioning protrusion on the power supply section (α) to prevent the above-mentioned position error from occurring.

Note that the first core (2) and the second core (6) are
In order to reduce the eddy current product, it is desirable to use a ferrite core.

According to the present invention having the above configuration, the first
The core (2) and the second core (6) form a closed magnetic path that passes through the primary winding (1) and the secondary winding (5), so these act in the same way as a transformer. It is.

Therefore, the power supplied to the primary winding (1) is transmitted to the secondary winding (5) and supplied to the load (C). Note that the load (C) is provided with a rectifier circuit if necessary.

In the present invention, the area of each opposing surface (8A) (9b) of the first core (2) and the second core (6) is the area of the primary winding (1) of the first core (2). Wrapped part (2α)
Since the cross-sectional area of the second core (6) is larger than the cross-sectional area of the part (6 cL) where the secondary winding (5) of the second core (6) is wound, the power supply part (α) and the power reception part (A) are Even if the opposing surfaces (8b) and (9b) of the first core (2) and second core (6) do not contact each other when brought close to each other or in contact with each other and a gap is created between them, the magnetic resistance due to the gap becomes small, so the magnetic resistance of the closed magnetic path as a whole becomes sufficiently small,
It is possible to obtain practically sufficient power transfer characteristics.

As described above, according to the present invention, by simply bringing the power supply section (α) and the power receiving section (1! Since electric power can be transmitted, it is extremely convenient to use various electrical and electronic devices as loads (C) without the hassle of plugging them in each time as in the past.

Furthermore, since there is no need to provide a plug insertion hole in the electrical/electronic equipment serving as the load (C), the appearance is also improved.

〔Effect of the invention〕

According to the present invention, it is possible to mechanically separate the power supply side and the load side very easily without providing a plug or the like on the load side, which saves time and effort when supplying power to various electrical and electronic devices as loads. This makes it easier to use the electrical/electronic equipment without the need for additional equipment, and also improves the appearance of the electrical/electronic equipment.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a configuration diagram of the present invention, FIG. 2 is a core piece, FIG. 2 (α) is a plan view, FIG. The same figure (C) is the right side view 1. t-
Figure 3 shows another core piece, the same figure (α) is a plan view, and the same figure (α) is a plan view.
b) is the front view, (C) is the right side view, Figure 4 is the experimental circuit diagram, Figure 5 is the voltage waveform diagram of each part in Figure 4, Figure 6 is
The figure shows the core used in the experiment, (α) is a front view, (5
) is a right side view, Figure 7 shows another core used in the experiment, (α) is a front view, (h) is a right side view, and Figure 8 is a table showing experimental data. (1)...Primary winding, (2)...Spear l core, (5
)...Secondary winding, (6)...Second core, (a)...
...Power supply section, (b)...Power reception section, (C)...
·load.

Claims (2)

[Claims] (1) The first winding is wound with a primary winding to which AC voltage is input.
a power supply unit having a core, and a second core wound with a secondary winding connected to the load, and a power reception unit that is separated from the power supply unit and integrated with the load. The first core and the second core form a closed magnetic path passing through the primary winding and the secondary winding when the power supply part and the power reception part are brought into close proximity or in contact with each other. In the power transmission device, the area of each opposing surface of the first core and the second core is defined as the cross-sectional area of the portion of the first core around which the primary winding is wound and the area of the opposing surface of the second core. A power transmission device characterized by having a cross-sectional area larger than the area around which the secondary winding is wound. (2) The power transmission device according to claim 1, wherein the area of one of the facing surfaces of the first core and the second core is larger than the area of the other.