JPS6152626B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a DC machine, and more particularly to a DC machine that does not use a commutator.

Since conventional DC machines use a commutator, this commutator generates commutating sparks, creating a risk of flashover.

The present invention has been made in view of the above circumstances, and provides a DC machine that does not use a commutator, and therefore has no risk of spark generation or flashover, and can obtain the same rotation as a conventional DC machine. The purpose is to

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. Although the present invention can be applied to either a rotating armature type or a rotating field type, the rotating armature type will be explained here as an example.

FIG. 1 is a perspective view showing an example of a motor to which the present invention is applied, with a part of the armature side omitted. 4 and 5 are slip rings, 6 and 7 are brushes, and 8 and 9 are switches consisting of a plurality of thyristors distributed at both ends of the armature coil 1. The thyristor has its anode connected to the tip of each hexagonal wire ring and its anode connected to the slip ring 5, and each thyristor at the other end has its cathode connected to the tip of each hexagonal wire ring and its anode connected to the slip ring 4. It is connected to the. Reference numeral 10 denotes a coil ring, in which a plurality of coils are arranged in a ring to receive gate signals to the thyristor switches 8 and 9 from excitation coils, which will be described later, and each coil is connected to the gate of the corresponding thyristor switch 8 and 9. has been done. Reference numeral 11 denotes an excitation coil for igniting the thyristor switches 8 and 9, which is provided in close proximity to the coil ring 10 so as to face the coil, and an excitation coil for extinguishing the arc, which is provided at approximately the middle position of the main magnetic pole, which will be described later. The excitation coil 12 is an alternating current or pulse power source connected to the excitation coil 11, which is arranged at a position shifted in the circumferential direction by several slot pitches, with the interval between the slots 3 of the armature core being one pitch. 13 is a thyristor switch 8, 9 connected to an AC or pulse power source 14;
In the excitation coil for arc extinguishing, as shown in Fig. 2, there is a main magnetic pole 15 of different polarity adjacent to the field side.
It is provided at a substantially intermediate position between N and 15S, that is, at a commutating pole position corresponding to a conventional DC machine.

Next, the operation of the above-mentioned electric motor according to the present invention will be explained. That is, the armature current of the motor flows from the brushes 9, 7 through the slip rings 4, 5, through the thyristor switches 8, 9, and through the armature coil 1. At this time, in order to generate rotational torque, the thyristor switches 8 and 9 should be turned on and off in synchronization with the rotation of the armature, and the coil ring 1
0 and an excitation coil 11 for ignition are provided for this purpose. That is, when each coil of the coil ring 10 faces the excitation coil 11, it receives an alternating current or pulse voltage due to mutual transformer action. Therefore, when the armature rotates, an alternating current or pulse voltage is induced in a specific coil in the coil ring 10 depending on the rotation angle, and this becomes a gate signal for a specific thyristor switch 8, 9 connected to that coil. The thyristor switch 8,
Turn on 9. By sequentially turning on the plurality of thyristor switches 8 and 9 in this way, rotational torque is generated and the device rotates.

In order to make this operation more understandable, we will explain it using an example of a 2-pole, 12-slot rotor. Figure 3 is a wiring diagram with a thyristor showing only the armature coil 1 in Figure 1 expanded as a 12-slot model (however,
(Gate connections are omitted). In this model, each end side of armature coil 1 is
12 thyristors, 24 in total, are distributed and arranged. Now, in FIG. 3, for convenience, all of these thyristors are numbered No. 1 to No. 24 from one end side. In such a state as shown in FIG.
No. 4 and No. 22 are connected to the armature coil located approximately in the middle of the arc-extinguishing excitation coil 13, which is located approximately 1.5 to 2.0 slot pitches away from the position of the extinguishing coil 13 in the circumferential direction. thyristor 8,9
If only the excitation coil 11 is turned on by the excitation coil 11, the current in the armature coil will flow as shown by the arrow in FIG. Generates torque.

By the way, as the electric machine coil 1 rotates, the coil ring 10 also rotates, and the coils excited by the excitation coil 11 also change one after another, and the thyristors that are turned on change one after another, so that the main magnetic pole 15 is turned on at any time.
The direction of the current changes at a position slightly shifted from the arc extinguishing excitation coil 13 located at the boundary between N and 15S.

Next, after turning on the plurality of thyristor switches 8 and 9 one after another as described above, the thyristor switches must be turned off one after another in the same way.
To turn it off, it is sufficient to apply a reverse voltage to it, and the extinguishing coil 13 for arc extinguishing is provided for this purpose. That is, as described above, this excitation coil 13 is connected to the adjacent main magnetic poles 15N, 1 of different polarity on the field side.
5S, and is excited by an alternating current or pulse power source 14, and this exciting coil 1
The thyristor connected to the armature coil 1 located opposite to the thyristor switch 3 is to be extinguished, and a reverse voltage is applied to these thyristor switches 8 and 9 one after another, and as mentioned above, the switch is turned on just before that. thyristor switches 8 and 9 immediately turn on one after another.
It will be turned off.

By the above operation, the thyristor switches 8, 9
It turns on and off, generates rotational torque, and rotates.Comparing this with a conventional DC machine using a commutator, the excitation coil 11 for ignition is placed at the inlet of the brush, and the extinguishing coil 11 is placed at the inlet of the brush, and The excitation coils 13 for the motor correspond to the outlet of each brush, and the DC machine according to the present invention does not have a commutator, so it is possible to obtain exactly the same rotation as a conventional DC machine. .

In the above-mentioned embodiment, as shown in FIG. 1, the excitation coils 11 and 13 for ignition and extinguishment were configured separately from the field core or the field coil (not shown). The excitation coils 11 and 13 may be incorporated into a part of the field core, or the excitation coil 1
1 and 13, a part of the field coil may also be used.

As described above, according to the present invention, it is possible to obtain a rotation equivalent to that of a conventional normal DC machine without using a commutator, and therefore to provide a novel DC machine without the risk of spark generation or flashover. be able to.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a motor to which the present invention is applied, with a part omitted on the armature side, and Fig. 2 is an installation of an excitation coil for ignition and extinction of a thyristor switch used in the motor. Figure 3, which is a diagram for explaining the position, is a wiring diagram with the thyristor showing only the armature coil developed as a 12-slot model. 1... Armature coil, 8, 9... Thyristor switch, 10... Coil ring, 11, 13...
Excitation coil, 12, 14...AC or pulse power supply, 15N, 15S...field side main magnetic pole. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1 At one end of the armature coil, an anode is connected to the tip of each hexagonal wire ring and a cathode is connected to the slip ring, and at the other end, a cathode is connected to the tip of each hexagonal wire ring and an anode is connected to the slip ring. a switch consisting of a plurality of thyristors distributed at both ends of the armature coil; and a switch consisting of a plurality of thyristors arranged in a ring at each end of the armature coil corresponding to each thyristor and each gate of the corresponding thyristor. two coil rings forming a plurality of connected coils; an ignition excitation coil that induces alternating current or pulse voltage in each coil of the coil ring to sequentially ignite the switches of each thyristor; A DC machine including an extinguishing excitation coil that is provided between adjacent main magnetic poles of different polarities on the magnetic side and that induces an alternating current or pulse voltage in the armature coil to sequentially extinguish each of the fired thyristor switches. .