JP3038682B2 - DC motor / DC generator - Google Patents

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 a DC motor and a DC generator having a commutator for distributing current.

[0002]

2. Description of the Related Art As a conventional DC motor or DC generator , for example, the one shown in FIG. 14 is known.

[0003] This conventionalDC motor or DC generator
Is a disk type DC motor
Then, coil 1 is wound in a disk shape and synthetic resin material etc. are molded.
And the commuter facing the rotor 2
Rotor 3 and commutator 3 are fixed coaxially
Radial magnetic steel on motor shaft 4 and ring-shaped mild steel 5
6 and a stator 7 to which the fixing member 6 is fixed. This rotor 2
All coils 1 of the commutator 3
It is connected to the data piece 8 in series.

[0004]

SUMMARY OF THE INVENTION The aforementioned conventional DC electric motor
In the machine / DC generator , since all the coils 1 of the rotor 2 are connected in series to all the commutator pieces 8 of the commutator 3, a considerably wide connection space S must be secured between the rotor 2 and the commutator 3. . For this reason, there is a problem that the motor design is not flexible, and it is not possible to sufficiently cope with reduction in size and weight in particular, and there is a problem that connection wiring work is troublesome and manufacturing cost increases. Also,
The problem is that it is not easy to replace the
You.

The present invention has been made in view of such problems, and has a degree of freedom in motor design, can sufficiently cope with miniaturization and weight reduction , and has a commutator.
It is an object of the present invention to provide a DC motor / DC generator having a rotor and commutator connection structure that can be easily replaced and whose manufacturing cost is low.

[0006]

Means for Solving the Problems To solve the above-mentioned problems, a DC motor / DC generator according to the present invention employs the following means.

That is, in the first aspect, the coil of the rotor is directly connected to the commutator piece of the commutator in series.
In a flow motor / DC generator , all the coils of the rotor are connected in series only to some commutator pieces of the commutator, and the commutator piece to which the commutator rotor coil is connected and the commutator piece to which the rotor coil is not connected are connected. Are connected.

In this means, a part of the conventional connection structure between the rotor and the commutator is replaced with the connection of the commutator pieces of the commutator, and the connection space between the rotor and the commutator is reduced.

According to a second aspect of the present invention, there is provided a DC motor according to the first aspect.
In the machine / DC generator , the rotor and the commutator are provided so as to face the coaxial motor shaft, and the connection between the commutator pieces of the commutator is made avoiding the end face of the commutator facing the rotor.

According to this means, the rotor and the commutator can be approached.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a DC motor according to the present invention will be described.
An embodiment of a DC generator will be described with reference to FIGS.

In this embodiment, a DC motor is shown.

The commutator 3 of this embodiment is similar to that of FIG.
As shown in the figure, the commutator piece 8 has three poles (A, B,
C) Each of the four poles has a total of 12 poles. A positive pole brush 10 (power supply side) and a negative pole brush 11 (current collection side) connected to a power source 9 are in sliding contact with the commutator 3.

Further, the rotor 2 of this embodiment is similar to that of FIG.
As shown in the figure, three coils 1 are provided. The coil 1 of one circuit is connected to the first commutator piece 8 of the commutator 3 and the commutator piece 8 of the fourth pole. Further, the coil 1 of the other one circuit includes a commutator piece 8 of the first pole B of the commutator 3.
And the fourth pole B commutator piece 8.
Further, the coil 1 of the remaining one circuit includes a commutator 3
Are connected to the commutator piece 8 of the first pole and the commutator piece 8 of the fourth pole.

Furthermore, in this embodiment, the commutator piece 8 of the first pole of the commutator 3 to which the coil 1 of the rotor 2 is connected is connected to the commutator piece 8 of the third pole A by the connection circuit 2. ing. Similarly, the first pole B commutator piece 8 and the third pole B commutator piece 8 are connected to the first pole C commutator piece 8 and the third pole C commutator piece 8 to the fourth pole. The commutator piece 8 of A and the commutator piece 8 of A of the second pole, the commutator piece 8 of B of the fourth pole and the commutator piece 8 of B of the second pole, and the commutator piece 8 of B
And the commutator piece 8 of the second pole C are connected by the connection circuit 12 respectively.

According to this embodiment, the number of connections between the rotor 2 and the commutator 3 is reduced, and the connection structure is simplified. Therefore, the connection space S between the rotor 2 and the commutator 3 can be reduced, so that the motor can be designed with a high degree of freedom, and it is possible to sufficiently cope with miniaturization and weight reduction. In addition, the wiring work for connecting the rotor 2 and the commutator 3 is facilitated, and the manufacturing cost is reduced. Furthermore, since the connection pitch of the commutator 3 does not need to be considered when winding the coil 1, the winding operation of the coil 1 is simplified.

In terms of a device, when the rotor 2 and the commutator 3 are provided facing the coaxial motor shaft 4, it is preferable that the connecting circuit 12 avoid the end face of the commutator 3 facing the rotor 2. . In particular, when a terminal or the like is provided on the end face of the commutator 3 opposite to the end face facing the rotor 2 and connected, the connection structure is most simplified.

FIGS. 2 to 13 illustrate the commutation (rectification) of this embodiment.

In FIG. 2, the positive pole brush 10 is in contact with the first pole A commutator piece 8, and the negative pole brush 11 is in contact with the fourth pole A commutator piece 8. In this commutation state, a current flows directly to the coil 1 irrespective of the connection circuit 12.

In FIG. 3, the positive pole brush 10 is in contact with the first pole B commutator piece 8, and the negative pole brush 11 is in contact with the fourth pole B commutator piece 8. In this commutation state, a current flows directly to the coil 1 irrespective of the connection circuit 12.

In FIG. 4, the positive pole brush 10 is in contact with the first pole C commutator piece 8, and the negative pole brush 11 is in contact with the fourth pole C commutator piece 8. In this commutation state, a current flows directly to the coil 1 irrespective of the connection circuit 12.

In FIG. 5, the positive pole brush 10 is in contact with the second pole A commutator piece 8, and the negative pole brush 11 is in contact with the first pole A commutator piece 8. In this commutation state, a current flows from the commutator piece 8 of the second pole A to the commutator piece 8 of the fourth pole via the connection circuit 12 and then to the coil 1. Note that the direction in which the current flows through the coil 1 is opposite to that in FIG.

In FIG. 6, the positive pole brush 10 is in contact with the second pole B commutator piece 8, and the negative pole brush 11 is in contact with the first pole B commutator piece 8. In this commutation state, a current flows from the commutator piece 8 of the second pole B to the commutator piece 8 of the fourth pole via the connection circuit 12 and then to the coil 1. The direction in which the current of the coil 1 flows is opposite to that in the case of FIG.

In FIG. 7, the positive pole brush 10 is in contact with the C commutator piece 8 of the second pole, and the negative pole brush 11 is in contact with the commutator piece 8 of the first pole. In this commutation state, a current flows from the commutator piece 8 of the second pole to the commutator piece 8 of the fourth pole via the connection circuit 12 and then to the coil 1. The direction in which the current of the coil 1 flows is opposite to that in the case of FIG.

In FIG. 8, the positive pole brush 10 is in contact with the third pole A commutator piece 8, and the negative pole brush 11 is in contact with the second pole A commutator piece 8. In this commutation state, current flows from the third pole A commutator piece 8 to the first pole A commutator piece 8 via the connection circuit 12 and then to the coil 1. In addition, the second commutator piece 8 of the fourth pole A
A current is collected in the commutator piece 8 of the pole A. In addition,
The direction in which the current of the coil 1 flows is the same as that in FIG.

In FIG. 9, the positive pole brush 10 is in contact with the third pole B commutator piece 8, and the negative pole brush 11 is in contact with the second pole B commutator piece 8. In this commutation state, a current flows from the third pole B commutator piece 8 to the first pole B commutator piece 8 via the connection circuit 12, and then a current flows to the coil 1. In addition, the second commutator piece 8 of the fourth pole B
A current is collected in the commutator piece 8 of the pole B. In addition,
The direction in which the current flows through the coil 1 is the same as that in FIG.

In FIG. 10, the positive pole brush 10 has the third pole C
And the negative pole brush 11 is in contact with the second commutator piece 8 of the second pole. In this commutation state, the connection circuit 12
, The current flows through the coil 1 after the current flows through the commutator piece 8 of the first pole. Also, the fourth
A current is collected from the commutator piece 8 of the pole through the connection circuit 12 to the commutator piece 8 of the second pole. The direction in which the current of the coil 1 flows is the same as that in FIG.

In FIG. 11, the positive pole brush 10 is the fourth pole A
, And the negative pole brush 11 is in contact with the third commutator piece 8 of A. In this commutation state, a current flows directly to the coil 1 irrespective of the connection circuit 12, but the commutator piece 8 of the first pole A connects the connection circuit 1
An electric current is collected to the commutator piece 8 of the third pole A through the second pole 2. Note that the direction in which the current flows through the coil 1 is opposite to that in FIG.

In FIG. 12, the positive pole brush 10 is the fourth pole B
And the negative pole brush 11 is in contact with the third commutator piece 8 of the B pole. In this commutation state, current flows directly to the coil 1 irrespective of the connection circuit 12, but the commutator piece 8 of the first pole B
An electric current is collected to the B commutator piece 8 of the third pole via 2. The direction in which the current of the coil 1 flows is opposite to that in the case of FIG.

In FIG. 13, the positive pole brush 10 has the fourth pole C
And the negative pole brush 11 is in contact with the third commutator piece 8 of the third pole. In this commutation state, a current flows directly to the coil 1 irrespective of the connection circuit 12, but the commutator piece 8 of the first pole C
A current is collected to the commutator piece 8 of the third pole via the second pole 2. The direction in which the current of the coil 1 flows is opposite to that in the case of FIG.

As described above, in addition to the illustrated embodiment, the present invention can be applied to other devices related to electromagnetic induction such as a generator.

[0032]

As described above, the DC motor according to the present invention is provided.
・ The DC generator has a common structure in each claim, because the number of rotor and commutator connections is reduced and the connection structure is simplified, so that the motor design has a high degree of freedom and can be adequately adapted to miniaturization. At the same time, there is an effect that the connection wiring work becomes easy and the manufacturing cost is reduced.

Furthermore, since the coil can be wound without considering the connection pitch on the commutator 3 side, the coil winding operation is simplified. Therefore, also replace the worn commutator.
It is easy and economical.

Further, there is the effect that parallel connection of commutators is facilitated.

[Brief description of the drawings]

FIG. 1 is a development view of a connection structure showing an embodiment of a DC motor / DC generator according to the present invention.

FIG. 2 is a main part of a development view showing commutation in FIG. 1;

FIG. 3 is a main part of a development view showing another commutation in FIG. 1;

FIG. 4 is a main part of a development view showing another commutation in FIG. 1;

FIG. 5 is a main part of a development view showing another commutation in FIG. 1;

FIG. 6 is a main portion of a development view showing another commutation in FIG. 1;

FIG. 7 is a main portion of a development view showing another commutation in FIG. 1;

FIG. 8 is a main part of a development view showing another commutation in FIG. 1;

FIG. 9 is a main part of a development view showing another commutation in FIG. 1;

10 is a main part of a development view showing another commutation in FIG. 1. FIG.

11 is a main part of a development view showing another commutation in FIG. 1. FIG.

12 is a main part of a development view showing another commutation in FIG. 1. FIG.

13 is a main part of a development view showing another commutation in FIG. 1. FIG.

FIG. 14 is a perspective view of a main part showing a conventional example.

[Explanation of symbols]

Reference Signs List 1 coil 2 rotor 3 commutator 4 motor shaft 8 commutator piece 10 + pole brush 11
-Pole brush

Claims (2)

(57) [Claims] 1. A DC motor or a DC motor comprising a rotor coil connected in series to a commutator piece of a commutator.
In the generator , all the coils of the rotor were connected in series only to some commutator pieces of the commutator, and the commutator piece to which the coil of the commutator was connected and the commutator piece to which the rotor coil was not connected were connected. A DC motor / DC generator characterized by the following. 2. The DC motor / DC generator according to claim 1, wherein the rotor and the commutator are provided so as to face a coaxial motor shaft, and the commutator pieces of the commutator are connected to the commutator rotor. DC motors and DC generators characterized by avoiding facing end faces
Machine .