Electricity: power supply or regulation systems – Including a transformer or an inductor – With core having permanent magnet or air gap
Patent
1993-01-11
1994-07-05
Stephan, Steven L.
Electricity: power supply or regulation systems
Including a transformer or an inductor
With core having permanent magnet or air gap
323902, 336120, H01F 2724
Patent
active
053270738
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to non-contact type load-dispatching equipment which supplies power to an autonomous mobile vehicle which is used in an environment wherein power supply by connecting an electrode is difficult, or to an autonomous mobile vehicle used in an ordinary environment wherein contact power supply by connecting an electrode or power supply by a trailing cable (lead wire) to a relatively moving body is difficult due to such reasons as damage, wear, or fatigue, for example, to an electric driverless transportation vehicle or the like which transports goods in a plant.
2. Description of the Related Art
A non-contact type load-dispatching equipment of the conventional type, split core type equipment using magnetic coupling, is known, which type is usually structured to a model with the shell type transformer shown in FIGS. 1A and 1B or to a model with a core type transformer shown in FIGS. 2A and 2B.
These were provided, for example, as shown in Japanese Patent Laid-Open 58-74021 Gazette, for non-contact load-dispatching by coupling power supply and receiving portions with a small gap therebetween, the power supply portion comprising power supply side winding Wa, power supply side core A, power supply side coupler D, and the receiving portion comprising receiving side winding Wb, receiving side core B and receiving side coupler E.
Though there is equipment which supplies electric power from a fixed portion to a rotary portion without contacting thereto as disclosed in Japanese Utility Model Publication 55-15297 Gazette or in Japanese Patent Laid-Open 61-281508 Gazette, all such equipment supplies power to a rotary portion in rotating motion and is not applicable to the autonomous mobile vehicle like the non-contact type load-dispatching equipment which is the object of the present invention.
Therefore, in order to increase transmission magnetic flux within the range of the core material saturation magnetic flux density, it becomes necessary to increase the cross sectional area, thus structurally making it inevitable to make a large frame for the core.
Further, since magnetic flux tends to leak in a butting type coupling as described above, it has been difficult to improve transmission efficiency.
SUMMARY OF THE INVENTION
An object of the present invention is to provide non-contact type load-dispatching equipment whose transmission power for the same volume and its efficiency are remarkably increased compared with the conventional type equipment by increasing the core utilization efficiency of the magnetically coupling portion and reducing leakage flux thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1A is a view showing the structure of a conventional type example of a shell type transformer model.
FIG. 1B shows a conventional shell type transformer model coupling.
FIG. 2A is a view showing the structure of a conventional type example of a core type transformer model.
FIG. 2B shows a conventional core type transformer model coupling.
FIG. 3 is a view showing the structure of a non-tapered type embodiment of the present invention.
FIG. 4 is a view showing the structure of a tapered type embodiment of the present invention.
FIG. 5 is a block diagram showing the structure of a control circuit to be used in the present invention.
FIG. 6 is a graph describing the photo-feedback operation of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
As an embodiment of the present invention, the embodiment with a rotary electric motor type non-tapered coaxial winding arrangement is first shown in FIG. 3.
Power supply side core A and receiving side core B are formed of a magnetic material, for example, ferrite or amorphous alloy, with a required number of slots and teeth adapted for high frequency use (square wave 10 KHz or more).
Teeth top surface TA of the power supply side core A and teeth top surface TB of receiving side core B are provided with respective teeth facing each other along the circumferences of different
REFERENCES:
patent: 4604575 (1986-08-01), Shimizu et al.
Hirai Junji
Ishibashi Toshihiro
Nitta Yuji
Han Y. Jessica
Kabushiki Kaisha Yaskawa Denki
Stephan Steven L.
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