JPS61214755A - Rotary electric machine - Google Patents

Abstract

PURPOSE:To reduce the height of a rotor coil formed at the end of a rotor by winding rotor coils on the salient poles of the rotor, and sequentially connecting the ends of the coil with a commutator. CONSTITUTION:An armature 100 has salient poles (a)-(h) projected at an equal interval toward the radially outer peripheral side in the circumferential direction. A commutator 20 has segments (i)-(p), and a brush 50 is lid thereto. After a rotor coil 60 connected at one end with a segment (i) is wound in a plurality of turns on the poles 10a, it is connected with a segment (j) adjacent to the segment (i). Then, the coil 60 is wound in a plurality of turns on the salient pole 10b, and connected with the next segment (k). The coil 60 is sequentially wound on the salient poles 10c-10h while connecting with segments (l)-(p), wound on the salient pole 10h, and then connected at the end with the segment (i) being connected in the earlier stage.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a winding of a rotor coil of a rotor in a rotating electric machine.

(Summary of the Invention) In a rotating electric machine including a rotor having a plurality of salient poles and a commutator, and a rotor coil, a rotor coil is wound around each salient pole of the rotor, and the rotor By sequentially connecting the ends of the coils to the commutator, the height of the rotor coil formed at the end of the rotor is reduced.

(Prior Art) As shown in FIGS. 3 and 4, the conventional technology uses, for example, two opposing north poles forming a two-pole field.

An armature 100 serving as a rotor is arranged inside a permanent magnet 40 having an S pole. This armature 100 is formed with eight radially protruding salient poles 10 and eight slots 30 between these salient poles 10. Further, the armature coil 60 is sequentially inserted into the thrower 30, skipping three salient poles 1O, and is wound in an overlapping manner. That is, the slot pitch is 3-pitch, and at this time, the armature coil 60 is wound by selecting a slot pitch that is close to 180 degrees in electrical angle. Also, armature coil 6
The ends of 0 are sequentially connected to segments 20 (11-18).

Further, the armature coil 60 may be wound in wave winding instead of lap winding.

(Problems to be Solved by the Invention) However, in the conventional device described above, since the armature coil 60 overlaps at the end of the armature 100, the axial dimension becomes long, and the armature coil There is a problem in that short circuits tend to occur where the two overlap.

(Means for solving the problem) A field pole having a number of poles of 2N (N is an integer), a salient pole rotated by the magnetic flux of this field pole and having 2×2N+1 or more salient poles, and a commutator. The present invention provides a rotating electric machine including: a rotor; and a rotor coil wound around each of the salient poles and having an end connected to the commutator in sequence.

(Function) A rotor coil is wound around each salient pole to eliminate overlapping of the rotor coils at the ends of the rotor.

(Example) The present invention will be described below with reference to embodiments shown in the drawings.

1 and 2 illustrate a two-pole field electric motor. 40 are permanent magnets forming a field, each with N
The poles and S poles are facing each other.

100 is an armature forming a rotor. To explain this armature 100, lO is 8 points a to h that are spaced at equal intervals in the circumferential direction and protrude toward the outer circumferential side in the radial direction.
There are two salient points. 20 is a commutator, which is formed of eight segments shown as i to p. 50 is commutator 2
It is a brush that slides on 0, and the positive electrode (+
) and a negative electrode (-) brush 50 are arranged. 3
0 is a slot formed between a and h of each salient pole 10. Reference numeral 60 indicates a rotor coil, and the plurality of rotor coils 60 are omitted in the figure. Further, to explain the winding of the rotor coil 60, the rotor coil 60 whose one end is connected to the segment i is wound around the salient pole 10a a plurality of times, and then connected to the segment j adjacent to the segment i. Thereafter, the rotor coil 60 is wound a plurality of times around b of the salient pole 10 and connected to the next segment k. Then, while connecting the rotor coil 16 to the segment 1-p,
After winding the salient poles C to h of the salient pole 10 in sequence and winding the salient pole h of the salient pole 10, the end portion is connected to the first connected segment i.

Next, the operation of the above configuration will be explained.

As shown in FIG. 1, the brush 50 on the + side is connected to segment i.
The - side brush 50 is in contact with segment m. At this time, when looking at the currents flowing through the rotor coil 60 wound around the salient poles 10, the currents are as shown by * and O in the figure. Then, by passing a current around the outer circumference of the salient pole 10, an S pole is formed at the a w d tip of the salient pole 10, and an N pole is formed at the ew tip of the salient pole 10. .

Therefore, the armature 100 rotates in the direction of the arrow (counterclockwise) due to the repulsive force and attractive force caused by the polarity of the permanent magnet 40 and the polarity of the salient pole 10.

As the armature 100 rotates, the commutator 20 also rotates. Therefore, the polarity formed at the tip of the salient pole 10 changes sequentially, and the armature 100 continues to rotate.

Therefore, since the rotor coil 60 is wound around each of the salient poles 10, the rotor coils 60 overlap at the ends of the armature 100 (the side where the commutator 20 is fixed and the opposite side). Because of this, the length of the armature 100 in the axial direction can be shortened, and short circuits between the rotor coils 60 can also be prevented.

Furthermore, it can be applied as is to conventionally used armatures (lap-wound or wave-wound), and there is no need to create a special iron core.

Further, since the rotor coil 60 is wound around the salient pole 10 in sequence, it is very easy to wind the rotor coil 60 around the salient pole 10, and the number of man-hours for assembly can be reduced.

In the above-mentioned embodiment, a two-pole field and an armature lOO having eight salient poles 10 were used, but when the field has 2N poles (N is rectification), the salient poles of the armature 100 It can be used in a rotating electric machine in which the number of 10 is 2X2N+1 or more.

Moreover, it may be used as a rotor of a generator instead of an electric motor.

Furthermore, although the permanent magnet 40 is used as the field, a field coil may be wound around the field core to form the field pole.

Further, the number of segments (i-p) of the commutator 20 is the same as the number of salient poles 10 of the armature 100, but for example, the number of segments of the commutator 20 is doubled, and the rotor coil 60 is attached to one salient pole. After winding a plurality of turns and connecting to a segment, the rotor coil is again wound around the salient pole a plurality of times and connected to the next adjacent segment. After that, the rotor coil may be wound around the next salient pole, so that the rotor coil is wound twice around one salient pole. As described above, even when the brushes short-circuit between adjacent segments, one of the rotor coils wound twice around the salient poles will not be short-circuited, and a decrease in the rotational force of the armature can be suppressed.

(Effects of the Invention) As described above, in the present invention, since the rotor coils of the rotor are wound thinly around the salient poles of the rotor, overlapping of the rotor coils formed at the ends of the rotor is eliminated. , the axial length of the rotor can be shortened, the rotor coil can be easily wound around the salient poles, and the number of assembly steps can be reduced.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing one embodiment of the rotating electrical machine of the present invention, Figure 2 is a schematic diagram showing an embodiment of the rotating electrical machine of the present invention;
The figures are an expanded winding diagram of the rotating electrical machine shown in FIG. 1, FIG. 3 is a schematic diagram of a conventional rotating electrical machine, and FIG. 4 is an expanded winding diagram of the rotating electrical machine shown in FIG. 3. DESCRIPTION OF SYMBOLS 10... Salient pole, 20... Commutator, 30... Slot, 40... Permanent magnet forming a field, 50... Brush, 60... Rotor coil, 100... Rotation Child armature

Claims (1)

[Claims] A field pole having a number of poles of 2N (N is an integer), a rotor that is rotated by the magnetic flux of the field pole and has 2×2N+1 or more salient poles, and a commutator; A rotating electric machine comprising: a rotor coil wound around each of the salient poles and having an end connected to the commutator in sequence.