JPS6162330A - Laminated core of rotary electric machine - Google Patents

Abstract

PURPOSE:To uniformize core temperature by constructing the core portion in a portion of lower temperature with silicon steel plates and constructing the core portion in a portion of higher temperature with amorphous metal plates. CONSTITUTION:Cooling air from a cooling fan 7 passes through a ventilating slot 6 axially provided on the surface of a rotor shaft 5, an air duct 9 provided in a rotor core 3 and an air duct 8 provided in a stator core 10, and is exhausted from one side of the rotating electric machine. The side 10a of the stator core 10 near the inlet of the ventilating slot 6 is constructed with silicon steel plates, and the side 10b in the inner part of the ventilating slot 6 is constructed with amorphous metal plates having less iron loss. With this, temperature increase lowers in the position 10b where the stator core temperature is higher, thereby uniformizing the stator core temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to improving temperature distribution in a laminated iron core of a rotating electric machine.

[Conventional technology]

FIG. 1 shows a laminated core of a conventional rotating electrical machine disclosed in, for example, Japanese Utility Model Application Publication No. 57-78245.
) is stator core, (2) is stator winding, (3) is rotor core, (4) is rotor winding, (5) is rotor shaft, (6)
is a ventilation groove provided in the axial direction on the surface of the rotor shaft (6),
(7) is a cooling fan, which is provided only on one side of the rotor shaft (5). Stator core (1) and rotor core (
3) are all stacked in the axial direction, and each is divided into a plurality of 1ζ blocks lc in the axial direction by air tack (8) or (9).

Next, cooling ventilation for this rotating electric machine will be explained.

The cooling fan (7) is provided only on one side and is a one-sided ventilation system. The cooling air flows through the rotor shaft (5) surface (ζ
The rotor core (
3), through the air duct (9) provided between the stator cores (1), and then through the air duct (8) provided between the stator cores (1).
Cooling fan (discharged from one side of the rotating electrical machine by force.

Air ducts (81, (9) are provided uniformly between the iron cores.

However, in such a conventional rotating electric machine, the ventilation resistance increases as the depth of the ventilation groove (6) increases. As shown in the figure, the stator core (1) far from the inlet of ventilation RF# (6) had the disadvantage of high core temperature.
) corresponds to each position.

[Summary of the invention]

This invention was made in view of the drawbacks of the conventional products as described above, and includes the following features: 1. The iron core part at a low temperature position is composed of a silicon steel plate, and the iron core part at a high temperature position is composed of an amorphous metal plate. This provides a laminated core for a rotating electrical machine that can make the core temperature uniform.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. In FIG. 8, (2) to (9) are similar to the configuration of the conventional device described above. αO is stator core, (10a)
(10b) is the side of the ventilation groove (6) near the population and one end side of the stator core αO made of silicon steel plate, (10b) is the side of the ventilation groove (6) close to the population.
For example, Fe-8i-B alloy, F
e-8i - This is the other end side of the stator core αO made of an amorphous metal plate such as a B-C alloy.

Next, the operation will be explained. Since the high-temperature position (10b) of the stator core αO is made of an amorphous metal plate with low iron loss, temperature rise is significantly reduced. Therefore, the temperature of the stator core is made uniform as shown in FIG.

In addition, although the above description was about improving the temperature distribution of the stator core, the present invention can also be applied to improving the temperature distribution of the rotor core, and the same effects as in the above embodiments can be obtained.

〔Effect of the invention〕

As explained above, this invention makes it possible to equalize the temperature of the iron core by configuring the iron core part at a low temperature position with a silicon steel plate and the iron core part at a high temperature position using an amorphous metal plate. .

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a laminated core of a conventional rotating electrical machine. FIG. 2 is an explanatory diagram showing the stator core temperature distribution of FIG. 1. FIG. 8 is a sectional view of a laminated core of a rotating electrical machine according to an embodiment of the present invention. cross section,
FIG. 4 is an explanatory diagram showing the stator core temperature distribution in FIG. 8. In the figure, (3) is the rotor core, (6) is the ventilation hole, α
0 is a stator core, and (10a) and (10b) are one end and the other end of the stator core. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] In a laminated core for a rotating electric machine that is laminated in the axial direction and has ventilation from one end of the core in the axial direction to the other end, one end of the core is made of a silicon steel plate, and the other end of the core is made of an amorphous metal plate. A laminated iron core for rotating electric machines characterized by: