JP2003032977A - Electromagnetic induction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain high output without increasing the diameter. SOLUTION: An electromagnetic induction machine is provided with disk- shaped rotors 4 with coils wound in magnetic paths composed of magnets 2 and a yoke 3. A plurality of sets of the magnets 2, the yoke 3, and the rotors 4 are arranged in parallel in the axial direction of a rotating shaft 7, and the coils of the rotors 4 in the individual sets are connected in series.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of electromagnetic induction machines such as electric motors and generators equipped with disk-shaped rotors.

[0002]

2. Description of the Related Art Conventionally, as an electromagnetic induction machine, for example,
It is known that a disk-shaped rotor in which a coil is wound is arranged in a magnetic path composed of a magnet and a yoke.

This conventional electromagnetic induction machine is provided as a relatively large DC motor because it can be expected to have a higher output than that of a machine in which a rotor coil is printed on a disk. The wound coil of the rotor is molded with a synthetic resin material or the like.

[0004]

The above-mentioned conventional electromagnetic induction machine has a problem in that, when a higher output is aimed, the number of magnets must be increased to increase the diameter.

In order to avoid the expansion of the diameter due to the increase in the number of magnets and direct a higher output, it is possible to increase the number of windings of the rotor coil. However,
An increase in the number of windings of the coil causes an increase in the laminated thickness of the windings (in particular, on the inner peripheral side), which widens the gap between the magnet and the yoke forming the magnetic path, resulting in high output. You will not be able to get it.

The present invention has been made in consideration of such problems, and an object of the present invention is to provide an electromagnetic induction machine capable of obtaining a high output without increasing the diameter.

[0007]

Means for Solving the Problems In order to solve the above problems, the electromagnetic induction machine according to the present invention employs the following means.

That is, according to the first aspect of the present invention, in an electromagnetic induction machine in which a disk-shaped rotor having a coil wound in a magnetic path composed of a magnet and a yoke is arranged, the magnet,
A plurality of pairs of yokes and rotors are arranged in parallel in the axial direction of the rotary shaft, and the coils of the rotors of each pair are connected in series.

By this means, the number of magnets is not increased,
Since the number of windings of the rotor coils is substantially increased by arranging the plurality of rotors in parallel, a high output can be obtained without increasing the diameter.

According to a second aspect of the present invention, in the electromagnetic induction machine of the first aspect, a common rotor mounting boss having a diameter larger than that of the rotary shaft on which the rotors are mounted is fixed to the rotary shafts, and the rotor coils of each set are coiled. It is characterized in that an electric wire for connecting in series is wired inside the rotor mounting boss.

According to this means, a plurality of rotors arranged in parallel are stably attached to a common rotor mounting boss, and electric wires for connecting the rotor coils in series are laid using the rotor mounting boss.

According to a third aspect of the present invention, in the electromagnetic induction machine of the first or second aspect, two adjacent sets of a magnet, a yoke, and a rotor are regarded as one unit, and a magnet is provided on each end face of a common yoke. It is characterized in that it is arranged between a pair of rotors.

In this means, a part of the yoke is shared by two adjacent sets of the magnet, the yoke and the rotor.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an electromagnetic induction machine according to the present invention will be described below with reference to the drawings.

This embodiment shows a flat type DC motor.

In this embodiment, two sets of a magnet 2, a yoke 3 and a rotor 4 are housed inside a casing 1 which is fitted in the middle.

The casing 1 includes a radial bearing 5,
A rotary shaft 7 is rotatably supported centering on a thrust bearing 6. The rotary shaft 7 is pulled out to only one side of the casing 1 as a one-sided drive.

A rotor mounting boss 8 having a relatively large diameter is fitted and fixed to the rotary shaft 1. The rotor mounting boss 8 has stepped portions 8a for mounting the rotor 4 on both end surfaces, and a fastening member 8b for fastening and fixing the rotor 4 fitted and attached to the stepped portion 8a is attached.

The two rotors 4 mounted on the rotor mounting boss 8 are connected in series by an electric wire 9 arranged inside the rotor mounting boss 8. Therefore, the rotor mounting boss 8 which is one member shared by the two rotors 4 is
Since the electric wire 9 for connection is disposed inside the rotor mounting boss 8 that is the member to be mounted and does not constitute a useless rotary structure, the rotation of the two rotors 4 is stabilized. . A brush 10 is in contact with one of the rotors 4.

The yoke 3 is located between the two rotors 4 and is sandwiched between the casing 1 and one ring plate 3a, and the two ring plates 3b and 3c joined and fixed to the inner end surface of the casing 1. Consists of. The magnets 2 are fixed to both end surfaces of the ring plate 3a located between the two rotors 4 of the yoke 3. Therefore, in the two sets of the magnet 2, the yoke 3 and the rotor 4,
The ring plate 3a located between the rotors 4 is shared. Therefore, the whole structure is made compact.

According to this embodiment, the plurality of rotors 4
Since the windings of the coil of the rotor 4 are substantially increased by arranging in parallel, high output can be obtained. Moreover, since the number of magnets 2 is not increased, the entire diameter is not expanded.

As described above, in addition to the illustrated embodiment, the invention can be applied to electric motors and generators other than DC motors.

Further, it is possible to arrange three or more sets of the magnet 2, the yoke 3 and the rotor 4 in parallel.

[0024]

As described above, the electromagnetic induction machine according to the present invention does not increase the number of magnets, but substantially increases the windings of the rotor coils by arranging a plurality of rotors in parallel. There is an effect that a high output can be obtained without expanding.

Further, as a second aspect, a plurality of rotors arranged in parallel are stably attached to a common rotor mounting boss, and an electric wire for connecting the rotor coils in series is wired using the rotor mounting boss. Therefore, there is an effect that the rotations of the plurality of rotors are stabilized.

Further, as a third aspect, since a part of the yoke is shared by the adjoining two sets of the gnet, the yoke and the rotor, there is an effect that the whole structure is made compact.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of an electromagnetic induction machine according to the present invention.

FIG. 2 is a central cross-sectional view of FIG.

[Explanation of symbols]

1 casing 2 magnets 3 York 4 rotor 7 rotating shaft 8 Rotor mounting boss

Claims (3)

[Claims] 1. An electromagnetic induction machine comprising a disk-shaped rotor having a coil wound in a magnetic path composed of a magnet and a yoke, wherein a plurality of sets of the magnet, the yoke and the rotor are arranged in the axial direction of the rotary shaft. An electromagnetic induction machine in which coils of rotors of each set are connected in series in parallel. 2. The electromagnetic induction machine according to claim 1, wherein a common rotor mounting boss having a diameter larger than that of the rotary shaft on which each rotor is mounted is fixed to the rotary shaft, and the coils of the rotors of each set are connected in series. An electromagnetic induction machine in which an electric wire is wired inside a rotor mounting boss. 3. The electromagnetic induction machine according to claim 1 or 2, wherein two adjacent sets of a magnet, a yoke, and a rotor are regarded as one unit, and magnets are provided on both end faces of a common yoke, respectively. An electromagnetic induction machine characterized by being placed in.