JPS61224851A - Brushless-axial air gap synchronous machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brushless axial air gear synchronous machine or an axially excited synchronous machine as defined in the preamble of claim 1.

In known synchronous machines of this kind, the stator laminated core, provided with radially running grooves, is wound around the armature winding in the following manner: one or more windings. The winding element sides in the winding layer are arranged in the grooves and the winding layer connecting these winding element sides is bent to the inner- and outer edges of the stator laminated core, e.g. at right angles in the axial direction. I try to place it as follows. This known synchronous machine is used as a drive motor for a rosette, because it has a large heat capacity in its stator laminated core, in which the armature winding is directly embedded. This is because it has a high overload capacity. Naturally, the grooved stator laminated core produces the desired detent torque, and the magnetic toothings tend to produce more or less significant noise depending on the rotational speed and the inherent resonances of this synchronous machine. There is.

Advantages of the Invention The axial air gap synchronous machine of the invention having the features indicated in the characterizing part of claim 1 has the following advantages compared to conventional devices. In other words, the high overload capacity of the synchronous machine due to the grooveless stator laminated core is not only maintained, but there is also the advantage that the normally extremely disturbing detent torque (Rast·er moment) is eliminated. Noise due to magnetic teeth is also avoided. The synchronous machine according to the invention can be manufactured with great ease in terms of manufacturing technology, both with respect to its stator and with respect to its rotor. The armature winding and stator laminated core are separately prefabricated and bonded together by simple gluing. The formation of grooves and the winding of windings around the stator laminated core, which are expensive in terms of production technology, are no longer necessary. Furthermore, the cast material ensures good heat conduction from the armature winding, which is formed as a so-called air-gap winding, to the stator laminated core.

The quadrupole according to the invention can be used equally advantageously as a robot motor and as a vehicle generator.

The larger conductor cross-sections required for vehicle generators configured as low-voltage machines are achieved by connecting the partial windings in parallel, the total axial length of the armature winding being variable. Not done.

The synchronous machine according to the invention has a sufficiently high overload capacity with good air cooling even at high ambient temperatures and with only a small rotating mass required in both applications.

The synchronous machine according to the present invention has good vibration resistance and is suitable for running in a vehicle.

When used as a vehicle generator, the required rectifier is integrated into the machine casing and placed in the cooling air stream. Implementation as a liquid-cooled synchronous machine is possible without changing the configuration of the electrical parts. The embodiments of the axial air synchronous machine shown in claim 1 are possible with the features shown in the dependent claims.

Advantageous implementations of the invention are indicated in the second claim. With this configuration, the shear gap windings, excluding the inner windings, have a constant axial thickness of only two conductors. Therefore, the outer windings are
As shown in claim 3, a portion is provided inside the end face of the stator laminated iron core. If the output of the synchronous machine does not change, the outer diameter of the stator will be smaller, or conversely, if the outer diameter of the stator is constant, a larger electrical output will be obtained.

An advantageous implementation is indicated in claim 11. With this arrangement, radial air ducts are provided between the permanent magnet segments, by means of which air is radiated to the outside during rotation of the disk rotor. This air forcibly cools the armature windings and stator laminated iron core.

Explanation of implementation sequence Next, embodiments of the present invention will be explained using the drawings.

The axial air-gap synchronous machine, shown in longitudinal section in FIG. 1, has a two-part synchronous machine casing 10 with two bearing brackets 11, 12. The rotor shaft 13 is rotatably supported in this bearing bracket. A disk rotor 14 is fixedly coupled to the rotor shaft 13 so as to be rotatable together with the shaft. This disk rotor 14 supports an excitation member formed from permanent magnet segments 15 . In this implementation, there are six permanent magnet segments 15 around the circumference of the disk rotor 14.
are similarly distributed and arranged. The permanent magnet segment 15 is embedded between two outer layers 16.17. As shown in the lower half of the disk rotor 14 in FIG. 1, the armor layers 16,17 are drawn inwardly adjacent to each other in the pole air gap. As a result, the disk rotor 14 is wound on the outside with a winding 18 made of high-strength material. This type of winding 18 is formed from a plurality of layers of glass fibers, and the glass fibers are wound around the permanent magnet 15 in a winding manner. The material for the exterior layer is a plastic layer (GFKJ) or non-magnetic steel (V
ZAJ is used.

Ring-shaped stator laminated cores 19 and 20 are supported in the synchronous machine casing 10 on both sides of the disk rotor 14 and spaced apart from each other in the axial direction. Each of the stator laminated cores 19, 20 is formed as a grooveless sheet roll 21, 22 of steel strip having a constant width.

The sheet metal coils 21, 22 are supported in the machine housing 10 by pressure springs and are further protected against axial displacement by protective elements (not shown), such as radial pins or springs. ing.

Each stator laminated core 19.20 or each sheet metal winding 21.22 supports a wound three-phase armature winding 23.24 of the insulation boat. This three-phase armature winding has radially extending winding element sides 25 and an outer winding layer 26 and an inner winding layer 27 connecting these winding element sides. The manufactured armature winding 23, 24 shown in FIG. It is glued to this end surface.

Each armature winding 2 as shown in detail in FIG.
The side 25 of the 3.24 winding element and the outer winding layer 26 are configured as only two layers superimposed on each other. In this case side 2 of the winding element running in the radial direction
5 are closely adjacent in each individual winding layer at the bends of the inner winding layer 27. In Figure 2, 3
Only one winding line of the two-layer wave winding is fully shown. In this case, the starting end of this winding line is U
The end is indicated by an X. On the other hand, two further winding lines with winding starts 1 to W and winding ends Y to 2 are shown on the sides of several winding elements. Second
In the figure, the winding element side 25 provided on the lower winding layer is also shown with a broken line, and the winding element side 25 provided on the upper winding layer is shown with a solid line. In the case of manufacturing the wave winding shown in Fig. 2, in the course of the extension of each winding line, the insulated wire is moved from the beginning of the winding line U or V or W to the end of the circuit line X or Y or 2 as follows. The guided, ie insulating wire runs in the upper winding layer in the winding run only in the area occupied by the track of the lower winding layer in the course of unwinding. The layer transition from the lower winding layer to the upper winding layer is at the outer winding head 26.
It is provided only in the area of In this case three winding tracks are wound in series, each winding track occupying one-third of the pole section. It is also possible to prefabricate the three winding lines separately and then to assemble them together as described above. The two-layer wave winding shown in FIG. 2, excluding the inner winding layer 27, has an axial thickness of only a fraction of the thickness of two insulated wires. In this way, a part of the outer winding layer 26 can also be arranged inside the end face of the ring-shaped sheet metal winding 21 or 22, as shown in FIG.

As shown, but not clearly, in FIG. 2, the outer winding layer 26 can also be, for example, arcuate and lead as follows, i.e. provided in the same winding layer but in different winding elements. It is also possible to conduct the adjacent winding layers 26 that belong to each other in such a way that they are in contact at least in the winding head section.

The element sides 25 in both winding layers are provided at ends running perpendicular to the axis of the disk rotor 14 and parallel to each other. The transition from the lower winding layer to the upper winding layer provided in the outer winding layer 26 is formed as follows, i.e. this transition is provided in the stator laminated core 19.20. In the case of two layers of wave windings 23, 24 which are glued on top or on top of the sheet windings 21, 22, they are designed so that they are provided on the outside of the stator laminated core 19, 20 or the sheet windings 21, 22. be done.

Thin plate winding 21.2 constituting stator laminated core 19.20
2 is supported within the synchronous machine casing 1o, so that
It can also be partially cast with the casing material.

The cooling of the two armature windings 23, 24 takes place as follows: Air flows through the radial ventilation ducts 28 and is radiated radially outwards in the case of the rotor of the disk rotor 14. , a cooling slit 2 between the stator laminated core 19 or 20 and the synchronous machine casing, which is internally provided with ribs for reinforcement.
9 and reach the inside again. Regarding the formation of the inner ribs, two inner ribs 30 are shown in FIG. The other part of the heat reaches the synchronous machine casing 10, which is provided with electrical pre-winding ribs.

The invention is not limited to the embodiment described above, which is used as an axial air gap synchronous machine provided as a robot motor.

If kept, this axial air gap synchronous machine can also be used as a power generator for a vehicle.

This type of power generator is designed as a low voltage junction. The larger conductor cross-section required for this purpose can be obtained by connecting the partial windings of the winding line in parallel, without increasing the overall axial length of the winding. . The rectifier required in the case of power generators is integrated in the synchronous machine casing and placed in the cooling air stream. It is also possible to implement a liquid-cooled power generator.

In this case, the coolant is conducted through channels provided in the surface of the synchronous machine casing. The heat from the armature windings is transferred, partly via the air in the interior space of the synchronous machine, through the synchronous machine casing, which is internally provided with reinforcing ribs, into the channels guiding the cooling liquid.

Effects of the invention, 29...Cooling slits According to the present invention, the high overload capacity of the synchronous machine is maintained as is, and by providing the stator laminated iron core without a slit, it becomes a significant hindrance. A significantly simpler synchronous machine is constructed in which detent torques are eliminated and tooth noise is also avoided.

[Brief explanation of drawings]

Figure 1 is a longitudinal section m1 of an axial air gap-synchronous machine used as a robot motor, and Figure 2 is a cross-sectional view of the axial air gap-synchronous machine used as a robot motor.
Axial air gap of 6 poles in figure - 3 for synchronous machine
1 is a block diagram of a phase two-layer wave winding, in this case only the contours of one winding path and two further winding lines are shown; FIG.

Claims (1)

[Claims] 1. A disk rotor supporting permanent magnet segments and two ring-shaped stator laminated cores supported on both sides of the disk rotor in a synchronous machine casing, the ring-shaped laminated cores each support a three-phase armature winding wound by an insulated wire, in which case the three-phase armature winding is connected to a radially extending side of the winding element and to the winding element. In a brushless axial air gear synchronous machine having an inner winding head and an outer winding head connecting each stator laminated core (19, 20)
is constructed as a grooveless thin plate winding (21, 22) formed from a steel strip having a certain width, and each armature winding (23
, 24) as a self-retaining two-layer wave winding, and the wave winding is adhered to the end face of the thin plate winding body (21, 22) by a casting member. Yatsupu - synchronous machine. 2. Side (25) of winding element of wave winding (23, 24)
and the outer winding head (26) are formed as only two winding layers overlapping each other, so that the conductor is guided from the winding start to the winding end in the course of the winding, and in this winding guidance, the conductor runs only in the area occupied by the conductor of the lower winding layer in the winding course, in the upper winding layer in the winding course, and the transition from the upper to the lower layer is carried out in the outer winding. A synchronous machine according to claim 1, wherein the synchronous machine is provided in the area of the line head (26). 3. The side (25) of the winding element running in the radial direction extends inward, and the inner winding head (27) is attached to the side of the winding element that is adjacent in the winding layer but belongs to a different winding element. 3. A synchronous machine according to claim 2, wherein the synchronous machine is at least substantially in contact with each other at a bending point. 4. Forming the outer winding head (26) e.g. arcuately, in this formation adjacent winding heads (26) provided in the same winding layer but belonging to different winding elements, at least A synchronous machine according to claim 2 or 3, wherein the synchronous machine is in contact with each other over the head section. 5. Side of winding element in both winding layers (25)
are provided on a surface running perpendicular to the axis of the disk rotor (14) and parallel to each other.
The synchronous machine described in any one of the preceding paragraphs. 6. The synchronizer according to any one of claims 2 to 5, wherein at least a portion of the outer winding head (26) is provided on the end face side of the thin plate winding (21, 22). Machine. 7. The layer transition from the lower winding layer to the upper winding layer, which is provided in the area of the outer winding head (26), is connected to the thin plate winding body (21).
, 22), the synchronous machine according to claim 6, which is provided outside the synchronous machine. 8. The synchronous machine according to any one of claims 2 to 7, wherein the winding line of wave windings (23, 24) is continuously wound. 9. According to any one of claims 2 to 7, the three winding lines of the wave windings (23, 24) are manufactured separately in advance and then connected to each other. synchronous machine. 10, Thin plate winding (21, 22) is attached to the synchronous machine casing (1
0) and protected against axial displacement by means of protective elements, such as radial pins or springs. The synchronous machine according to any one of the items. 11. Permanent magnet segment of disk rotor (14) (
15) is embedded between the two exterior layers (16, 17), and the exterior layers (16, 17) are placed in the gap between the magnetic poles so that the exterior layers are in contact with each other and are arranged in a radial ventilation duct (28). ) is bent inward so as to form a
Synchronous machine as described in Section.