JPS5950737A - rotating electric 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 rotating electrical machine equipped with a cage rotor, such as a cage induction motor.
An embodiment of the present invention will be described with reference to the drawings. In the figure, 1 is a cage rotor, 2 is a rotor core of the cage rotor 1, 2a is a through hole in the axial direction formed in the center of this rotor core 2, and 2b is a rotor core 2. A plurality of through holes are drilled in the axial direction at the peripheral edge of the through hole 2a, and are arranged radially and at equal intervals with respect to the center of the through hole 2a. 3. A plurality of secondary conductors that are respectively fitted into the plurality of through holes 2b and whose both ends protrude from both end surfaces of the rotor core 20, respectively;
4 is a pair of short-circuit rings connected to both ends of each of the plurality of secondary conductors 3, 5 (2) is a rotating shaft whose middle portion is fitted into the through hole 2a, and 6 is connected to this rotating shaft 5. It is a filler made of varnish or synthetic resin that is mixed with the magnetic fluid filled in the fitting surface with the through hole 2a.

In this embodiment, as described above, the fitting surfaces of the rotor 2 and the rotating shaft 5 are bonded with the filler 6, so that the magnetic resistance of the fitting part is lowered, so leakage magnetic flux is reduced, and the rotor core internal structure is reduced. Since concentration and relaxation of the magnetic flux in the rotor core and distortion of the magnetic flux in the rotor core are corrected, the characteristics of the rotating electrical machine are improved, the rotating electrical machine can be made smaller, and it can be manufactured at a lower cost.

Next, another embodiment of the present invention will be described with reference to FIG. 6 is a filler made of synthetic resin or varnish containing a mixture of magnetic fluid filled in the fitting surfaces of the plurality of through holes 2b and the plurality of secondary conductors 3. Since it is the same as the above embodiment, the explanation is omitted.Since the fitting surfaces of the plurality of through holes 2b and the secondary conductor 3 are combined with the filler 6, the plurality of through holes 2b and the secondary conductor 3 are connected to each other by the filler 6. 3 are strongly connected to each other, the rigidity of the rotor is improved.

(3) As explained above, in a rotating electrical machine equipped with a cage-shaped rotor and a rotating shaft that is fitted into the inner circumference of the rotor, the present invention provides a method for filling the fitting surface between the rotor and the rotating shaft. Since the parts are filled with the agent and bonded together, the characteristics of the rotating electrical machine are improved, the rotating electrical machine can be made smaller and cheaper, and rust can be prevented from forming on the mating surfaces. It also has the effect of improving the rigidity of the rotor.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing one embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is a cross-sectional view of another embodiment of the invention. . In the figure, 1 is a cage rotor, 2 is a rotor core, 2a, 2b
is a through hole, 3 is a secondary conductor, 4 is a short circuit ring, 5 is a rotating shaft, 6
is a filler. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kuzuno (4)

Claims (5)

[Claims] (1) In a rotating electrical machine equipped with a cage-shaped rotor and a rotating shaft fitted to the inner circumferential surface of the rotor, the fitting surface of the rotor and the rotating shaft is filled with a filler and the rotating shaft is rotated. A rotating electrical machine characterized by combining a child and a rotating shaft. (2) The rotating electric machine according to claim 1, wherein the filler is a magnetic fluid mixed with magnetic fluid. (3) The rotating electric machine according to claim 1, wherein the filler is a synthetic resin mixed with magnetic fluid. (4) In a rotating electric machine equipped with a cage-shaped rotor and a rotating shaft fitted to the inner circumferential surface of the rotor, the fitting surface of the rotor and the rotating shaft is filled with a filler, and the rotating shaft is rotated. The rotor core and the secondary conductor are connected to each other by (1) filling the fitting surface between the rotor core and the secondary conductor of the rotor with a filler. Characteristic rotating electric machine. (5) The rotating electric machine according to claim 4, wherein the filler is a mixture of magnetic fluid, varnish, or synthetic resin.