JPH089617A - Non-contact power transmission device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The rotating body is cordless and lightweight.
(EN) Provided is a non-contact power transmission device capable of automatically correcting a mounting position on an installation body. [Structure] The coil 4 of the installation body 1 receives a high-frequency current from the inverter 3 to generate a rotating magnetic field, and the rotor 7 of the rotating body 5 mounted and used on the installation body 1 uses the rotating magnetic field. In response to this, the installation body 1 rotates while being attracted by the magnetic force. Since the bottom surface of the rotary body 1 is made of a material having low frictional resistance, when the mounting position of the rotary body deviates from the regular position, the rotary body 1 is automatically moved to the regular position by the combined force of the horizontal component of the rotating magnetic field.

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 transmission device capable of various rotary cooking by replacing a cordless attachment.

[0002]

2. Description of the Related Art Products that use rotary cutting, such as mixers and speed cutters, are individual products classified by function, and each has a motor. Has become. Due to the above reasons, such a rotating cooked product has a problem that it is heavy in weight and has a trouble of being stored because it has a power cord.

In order to solve such a problem, the inventors of the present invention have proposed a product in which the weight of each individual rotating cooked product is reduced and the power cord which obstructs the use and storage of the product is eliminated. It is a thing. That is, the rotating main body as an attachment is placed on the installation main body, and the attachment is a non-contact power transmission device configured to operate in a cordless manner by receiving a rotating magnetic field from the installation main body.

[0004]

In the above-mentioned conventional non-contact power transmission device, the rotating body does not require electric parts such as a motor, and it is small and lightweight, the storage space can be reduced, and the power cord is unnecessary. It is convenient. However, this structure has a problem that the user must always mount the rotating main body accurately at a predetermined position in order to obtain a predetermined rotation performance.

The present invention is intended to solve the problems of such a conventional structure. The rotary body is cordless and lightweight, and the mounting position on the installation body can be automatically corrected. A first object is to provide a contact power transmission device. The second and third objectives are to provide the second and third means for achieving the first objective.

[0006]

The first means for achieving the first object of the present invention is to provide an inverter for producing an alternating voltage having a frequency different from that of the commercial power source, and an output of the inverter. A rotating body having a rotor that rotates by receiving a rotating magnetic field from the coil, and the rotating body has a bottom surface that is in contact with the installing body with low frictional resistance. The non-contact power transmission device is composed of.

The second means of the present invention for attaining the second object is an inverter for producing an alternating voltage having a frequency different from that of the commercial power source, and a rotating magnetic field generated by receiving the output of the inverter. An installation main body having a coil, a rotor rotating by receiving a rotating magnetic field from the coil, and a rotating main body having a repulsive magnetic field generating means, the repulsive magnetic field generating means levitating the rotating main body from the installation main body. It is a non-contact power transmission device.

A third means of the present invention for achieving the third object is an inverter for producing an alternating voltage having a frequency different from that of the commercial power source, and a rotating magnetic field generated by receiving the output of the inverter. A coil, and an installation body having ultrasonic wave generating means for generating ultrasonic vibrations, and a rotating body having a rotor that rotates by receiving a rotating magnetic field from the coil, wherein the ultrasonic wave generating means is provided in the rotating body. It is a non-contact power transmission device that gives a slight vibration.

[0009]

According to the first means of the present invention, the coil of the installation body receives a high frequency current of the inverter to generate a rotating magnetic field, and the rotor of the rotating body mounted on the installation body is used. In response to this rotating magnetic field, it rotates in a cordless state without making contact with the installation body, and the material with low frictional resistance that forms the bottom surface of the rotation body does not move from the regular mounting position of the rotation body. If it is, it works to automatically correct the position.

The second means of the present invention is that the repulsive magnetic field generating means of the rotating body acts so as to repel the magnetic field generated by the coil of the installation body and lift the entire rotating body. .

The third means of the present invention is that the ultrasonic wave generating means provided in the installation main body causes a slight vibration to the rotary main body so that the mounting position of the rotary main body is always a regular position. It works.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. Reference numeral 1 denotes an installation main body, which internally has an inverter 3 which receives a commercial power supply voltage via a power cord 2 to convert the frequency and voltage of the commercial power supply, and a coil 4 which receives the voltage of the inverter 3 and generates a rotating magnetic field. have. In this embodiment, the inverter 3 includes position detecting means for detecting the position of the permanent magnet 6 included in the rotor 7 and control means for controlling the rotation speed. The coil 4 is divided into a plurality of parts as indicated by 4a and 4b in the figure, and the voltage of the inverter 3 is sequentially applied to the divided coil pieces.
Therefore, the coil 4 generates a rotating magnetic field having a frequency corresponding to this voltage. That is, it acts as a stator of the motor. The configurations of the inverter 3 and the coil 4 for generating the rotating magnetic field are publicly known, and in the present embodiment, a three-phase full-wave system using six power elements is used.

Reference numeral 5 denotes a rotary body which is an attachment used by being mounted on the installation body 1. In this embodiment, the rotating body 5 is a mixer. Inside the rotary body 5, a rotor 7 to which a rotary blade 8 is connected is provided. A permanent magnet 6 is arranged on the rotor 7. A rotary blade 8 is connected to the rotor 7, and the rotary blade 8 is rotated by the rotation of the rotor 7.
Is driven to rotate. The bottom surface, which is the contact surface of the rotating body 5 with the installation body 1, is coated with Teflon resin having an extremely low friction coefficient.

A switch 9 connected to a simple logic circuit is provided on the side surface of the installation body 1 to drive / stop the inverter 3 and instruct a frequency.

The operation of this embodiment will be described below. The user places the rotating body 5 on the installation body 1 and switches 9
When is turned on, the inverter 3 in the installation body 1 starts driving. That is, an AC voltage is applied to the coil 4 divided into a plurality of parts. Therefore, the coil 4 generates a rotating magnetic field, the permanent magnet 6 provided on the rotor 7 of the rotating body 5 is attracted by the magnetic field generated by the coil 4, and the entire rotor 7 starts rotating motion. Due to the rotational movement of the rotor 7,
The rotary blade 8 connected to the rotor 7 also rotates to rotate the rotary body 5
Cut the food contained inside.

At this time, the magnetic field generated by the coil 4 causes the rotor 7 to rotate and, at the same time, causes a rotational force of 1 to the rotor 7.
A suction force of about 0 times acts. The rotating body 5 is pressed against the installation body 1 by this suction force. Here, when the mounting position of the rotary body 5 is displaced from the center of the coil 4, the attraction force acts between the rotor 7 and each piece of the coil 4 divided into a plurality of parts.
A diagonally downward vector results in horizontal component force. Here, in this embodiment, the bottom surface of the rotary body 5 is coated with Teflon resin having an extremely low coefficient of friction, and this horizontal component force causes the center axis of the rotary body 5 to coincide with the central axis of the coil 4. Automatically move to the matching position.

As described above, according to the present embodiment, when the mounting position of the rotary body 5 is inappropriate, the position is automatically corrected by the Teflon resin coating provided on the bottom surface of the rotary body 5. Is performed, and it is possible to always obtain a predetermined rotation performance. Further, the rotating body 5 can be attached to and detached from the installation body 1, and the rotating body 5 can be moved to take in and out foodstuffs inside, or only the rotating body 5 can be stored. It goes without saying that if the mixer used as the rotary body 5 is replaced with another type, another cooking can be performed. Further, in this embodiment, since the inverter 3 is used to generate the rotating magnetic field, the rotation controllability is particularly good,
The number of rotations can be freely adjusted according to the purpose. Furthermore, since the permanent magnet 6 is used for the rotor 7, it is easy to obtain a driving torque.

In this embodiment, the bottom surface of the rotary body 5 is coated with Teflon resin, but it is not always necessary to pay attention to the coating.
It suffices that the structure has a low coefficient of friction between and.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, the repulsive magnetic field generating means 10 is connected to the inverter 3. The repulsive magnetic field generating means 10 comprises about two to eight six-phase full-wave type power elements constituting a power source for generating a rotating magnetic field in the coil 4.
The time-divisional use is used at a rate of 5 to flow the current in the direction of repulsing the permanent magnet 6 for the time of 2 and the current for generating the rotating magnetic field in the time of 8.

With the above-mentioned structure, the permanent magnet 6 provided on the rotor 7 receives a momentary upward floating force, and rotates in this state following the rotating magnetic field generated from the coil 4. . Therefore, the rotary body 5 is slightly lifted, and the frictional resistance between the rotary body 5 and the installation body 1 is very small.

That is, according to the present embodiment, as in the previous embodiments, when the mounting position of the rotary body 5 is inappropriate, the position is automatically corrected and a predetermined rotation performance can always be obtained. It is possible.

In this embodiment, the coil 4 is configured to generate a magnetic field in which the rotating magnetic field and the repulsive magnetic field are superposed, but the coil 4 is dedicated to the rotating magnetic field, and a separate coil dedicated to the repulsive magnetic field is prepared. Also has the same effect.

Next, the third embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. In the present embodiment, the ultrasonic vibrating body 12a that constitutes the ultrasonic wave generating means 12 is provided on the upper part of the installation body 1. Also, the oscillator 12b and the amplifier 12
Similarly, c constitutes the ultrasonic wave generating means 12.

With the above construction, the ultrasonic wave generated by the ultrasonic wave generating means 12 acts so as to cause the vertical vibration of the rotary body 5. The strength of the vertical micro-tremor is naturally set to a vibration level such that the rotating body 5 does not roll down from the installation body 1.
The vibration sound generated is also weak. For this reason,
The frictional resistance between the rotary body 5 and the installation body 1 is reduced, and the position of the rotary body 5 is easily and automatically corrected as described in the above embodiments.

In each of the above-described embodiments, the inverter 3 has a three-phase full-wave system configuration in which six power elements are used. However, the configuration is not limited to this, and the point is to generate a rotational torque. Any material can be used as long as it can supply the rotating magnetic field. Further, as a matter of course, the rotating body may be something other than a mixer such as a juicer or a rice cake maker.

[0026]

The first means of the present invention is an installation body having an inverter for producing an AC voltage having a frequency different from that of the commercial power source, and a coil for receiving the output of the inverter and generating a rotating magnetic field. A rotating body having a rotor that rotates by receiving a rotating magnetic field from the coil, the rotating body having a bottom surface in contact with the installation body made of a material having a low friction resistance, and the rotating body is cordless and has a large weight. The present invention realizes a non-contact power transmission device that is light in weight and can automatically correct the mounting position on the installation body.

A second means of the present invention is an installation body having an inverter for producing an alternating voltage having a frequency different from that of the commercial power source, and a coil for receiving an output of the inverter to generate a rotating magnetic field, A rotating body that receives a rotating magnetic field from a coil and rotates, and a rotating body having a repulsive magnetic field generating means, and the repulsive magnetic field generating means is configured to levitate the rotating main body from the installation main body, particularly by utilizing magnetic force. , A non-contact power transmission device capable of automatically correcting the mounting position of the rotating body.

The third means of the present invention is to provide an inverter for producing an alternating voltage having a frequency different from that of the commercial power source, a coil for receiving a rotating magnetic field by receiving the output of the inverter, and an ultrasonic vibration. And a rotating body having a rotor that rotates by receiving a rotating magnetic field from the coil, wherein the ultrasonic wave generating means applies a slight vibration to the rotating body. It is intended to realize a non-contact power transmission device that can automatically correct the mounting position of a rotary body by utilizing ultrasonic vibration.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a non-contact power transmission device according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway sectional view of the non-contact power transmission device according to the second embodiment.

FIG. 3 is a partially cutaway sectional view of the non-contact power transmission device according to the third embodiment.

[Explanation of symbols]

 1 Installation Main Body 3 Inverter 4 Coil 5 Rotating Main Body 7 Rotor 10 Repulsive Magnetic Field Generating Means 12 Ultrasonic Wave Generating Means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Asada 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Hideki Omori 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. An installation main body having an inverter for generating an AC voltage having a frequency different from that of the commercial power supply, a coil for generating a rotating magnetic field by receiving the output of the inverter, and a rotating magnetic field from the coil. A non-contact power transmission device, comprising a rotating body having a rotor that rotates, and the rotating body has a bottom surface in contact with the installation body made of a material having low frictional resistance. 2. An installation main body having an inverter that produces an alternating voltage having a frequency different from that of the commercial power source, a coil that receives an output of the inverter to generate a rotating magnetic field, and a rotating magnetic field from the coil. A non-contact power transmission device comprising: a rotor that rotates in a rotating manner; and a rotating body having a repulsive magnetic field generating means, the repulsive magnetic field generating means levitating the rotating main body from the installation body. 3. An inverter for generating an alternating voltage having a frequency different from that of the commercial power source, a coil for generating a rotating magnetic field by receiving the output of the inverter, and an ultrasonic wave generating means for generating ultrasonic vibrations. A non-contact power transmission device comprising an installation body and a rotating body having a rotor that rotates by receiving a rotating magnetic field from the coil, wherein the ultrasonic wave generating means gives a slight vibration to the rotating body.