JPS6038932B2 - Stator coil connection device for rotating electrical machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stator coil connecting device for a rotating electrical machine that enables automation of stator coil connecting work.

FIG. 1 shows a cross-sectional view of an end portion of a conventional rotating electric machine.

In FIG. 1, a stator core 2 is mounted on a stator frame, and a stator coil 3 is wound around the stator core 2 to form a stator. In addition, the rotor for this stator is equipped with a rotor iron D5 that faces the stator iron ○2 through a gap on the rotating shaft 4, and a rotor coil and a cooling fan 6 (not shown) are installed on the rotor iron core 5. It is composed of Thus, an end bracket 7 is attached to the end of the stator frame 1.
is installed, and this end bracket 7 connects the bearing 8.
The rotary shaft 4 is rotatably supported through the rotary shaft 4. On the other hand, an air guide plate 9 is provided at the end of the stator coil 3 so as to cover it, and the air guide plate 9 directs the cooling air sucked in from the air holes 7a of the end bracket 7 during operation into the air guide plate 9 as shown by the arrow. After flowing through the end portion of the stator coil 3 to cool it at 9, it is configured to be discharged from the air hole la of the stator frame 1. By the way, the rotating electric machine having such a configuration has the following problems.

That is, in the above, the stator coil 3 is each phase coil U, o, U.
2o, V, o, V2o, W, o, W2. are connected as shown in Figure 2 a or b depending on the voltage used. In the connection between each coil, for example, when connecting two wires as in connection part X, U2 in Fig. 2a,
As shown in Figure 3a, the parts of the magnet wires 20 and 21 protruding from the insulation tubes 22 and 23 are twisted together and soldered at their tips 24, and the insulation is maintained by covering the twisted parts with the insulation tube 25. are doing. In addition, the connecting part
, Z, Y2, when connecting three wires,
As shown in Figure 3b, magnet wires 20, 21,
The protruding portions of 26 insulating tubes 22, 23, and 27 are twisted together, their tips 24 are brazed, and an insulating tube 25 is placed over the twisted portions to maintain insulation. However, in either of the connection systems shown in FIGS. 3a and 3b, means are required for twisting two or three wires together, brazing them together, and covering them with an insulating tube.

This not only becomes a major obstacle to automatic winding of the stator coil 3, but also creates a bulky structure at the end of the stator coil 3, as shown in connection 3a in FIG. Therefore, there is a problem in that the cooling effect for this part is deteriorated. The present invention was made in order to solve the above-mentioned problems, and the purpose is to automate the connection work of stator coils and improve the cooling effect on the end portions of the coils. An object of the present invention is to provide a stator coil connection device for a rotating electric machine.

Embodiments of the present invention shown in FIGS. 4 to 9 will be described below.

FIG. 4 is a sectional view showing an example of the configuration of an end portion of a rotating electric machine to which the present invention is applied. In the figure, the same parts as in FIG. Only the different parts will be described here. That is, in FIG. 4, an intermediate terminal plate ID made of an insulating material as shown is provided at the end portion of the stator coil. This intermediate terminal plate 10 is a disc-shaped terminal plate that also serves as the air guide plate, as shown in FIGS. 5 and 6, respectively, in a front view and a cross-sectional view. Connection terminals 11 made of a predetermined number of conductors are provided on the surface opposite to the third end portion. This connection terminal 11 has a groove 11a, and this groove 11
The entrance part a has a tapered surface 11b. In addition, on the surface of the intermediate terminal plate 10 on the stator coil 3 end side,
A plurality of legs 12 are provided for fixing the intermediate terminal plate 10 to the end portion of the stator coil 3. Further, the intermediate terminal plate 101 is provided with a predetermined number (12 in the illustrated case) of grooves 13 cut alternately from the outer and inner circumference sides thereof. Furthermore, three of the connection terminals 11 are provided with outlet connection terminals 1 as shown in FIGS. 7a and 7b.
4 are provided, and the output lead wires of each phase are connected to the output connection terminals 14 of the brackets. Next, in order to connect the coils shown in FIG. 2a using the intermediate terminal board 10, first, each terminal of each coil is
,, Y2, V2, Z, W, and Z2, W2 lead wires are led out from the groove 13 of the intermediate terminal board 10 shown in FIG. 5, and inserted into the groove 11a of the corresponding connection terminal 11, and then By applying pressure to this groove 11a, the tapered surface 11b is removed from the insulating film of each terminal, and when the wire 1 enters the depth of the groove, the electrical connection between the wire 1 and the connecting terminal 11 is completed.

Thereafter, the outlet lead wires U, V, and W of each phase are connected to the outlet connection terminal 14 provided on the connection terminal 11, and FIGS. 8 and 9 show a cross-sectional view and a side view thereof. like,
It is led out from the stator frame 1 via the rubber bush 15. As a result, by connecting the terminals of each phase coil to the connection terminals 11 of this intermediate terminal board 10, the crossover connection and neutral point connection of each phase coil are completed, and the intermediate terminal board 10
The effect of cooling the end portion of the stator coil 3 is improved by the baffle plate action. Therefore, from the above, when connecting coils, there is no need for conventional means such as twisting wires together, brazing, covering insulating tubes, etc., and it becomes possible to automate the coil connection work.

Furthermore, while the rotating electric machine is in operation, as shown in Fig. 4, the end part has no connection part like the conventional one, and the end part is exposed inside the machine, increasing the cooling surface area, and the intermediate terminal board 10 also functions as a wind guide plate. This makes it possible to guide the cooling air to the end portion of the stator coil 3 and improve its cooling effect. As explained above, according to the present invention, by configuring the end portion of the stator coil to be provided with an intermediate terminal board that also serves as a baffle plate and equipped with connection terminals, it is possible to automate the subsequent work of the coil. Furthermore, it is possible to provide a stator coil connection device for a rotating electric machine that can improve the cooling effect on the end portion of the coil.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the end part of a conventional rotating electrical machine, Figure 2
Figures a and b are wiring diagrams showing how to connect the stator coils.
Figures a and b are cross-sectional views showing the connecting parts used for coil interconnection, Figure 4 is a cross-sectional view showing the end part of a rotating electric machine to which the present invention is applied, and Figure 5 is an intermediate terminal board used in the present invention. 6 is a cross-sectional view taken along the line A-A in FIG. A sectional view showing an outlet of a rotating electric machine,
FIG. 9 is a side view of FIG. 8. 1...Stator frame, 3...Stator coil, 10...Intermediate terminal plate, 11...
-Connection terminal, 12...leg, 13...groove, 14...outlet connection terminal. Figure 1 Figure 2 Figure 3 Figure 7 Figure 4 Figure 5 Figure 6 Figure 8 Figure 9

Claims (1)

[Claims] 1. An intermediate terminal plate that is provided at a distance from the end of a stator coil of a rotating electric machine and serves as a baffle plate that guides ventilation inside the stator along the coil end, and the above-mentioned fixing of this intermediate terminal plate. A predetermined number of connection terminals provided on the surface opposite to the child coil end portion for interconnecting the coil terminals of the stator coil, and a predetermined number of connection terminals provided with outlet lead wires. A stator coil connection device for a rotating electrical machine, comprising: an outlet connection terminal; and a predetermined number of grooves provided on the intermediate terminal plate for guiding lead wires of the coil terminals to the connection terminals.