JPH1056747A - Wedge for compressor motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a wedge for a compressor motor from being dislocated in the up-and-down direction due to an electromagnetic vibration by a method wherein, out of outside parts of bent lines, the part on the side of the bend direction of a coil group is made larger than the width of the other part. SOLUTION: A wedge 1 is formed in such a way that a sheet of rectangular electric insulating paper whose length is identical to, or a little longer than, that of a slot at a stator core for a compressor motor is bent to the outer circumferential side of the stator core by two bent lines 2, 3 by keeping a small interval. Then, in a state that the wedge is set, the width (a) of a part 4 to be used as the side in the bend direction of a core group is made larger than the width (b) of the other part 5. As a result, the side in the bend direction of the coil group exerts a larger force on the wall surface of the slot than its opposite side, the part 4 having the larger width (a) comes into contact with the coil group in a wide area in a state that the coil group is set on the open side without a slot, and the coil group is sandwiched strongly. Consequently, it is possible to restrain the movement in the up-and-down direction of the wedge 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for a compressor motor, in which a stator core is accommodated in a slot for accommodating a coil formed in an axial direction on an inner peripheral surface of the stator core so as to close an open side thereof. Wedge (insulating paper).

[0002]

2. Description of the Related Art As a wedge which is inserted into a slot of a stator core of a compressor motor and closes an open side thereof,
Conventionally, the one shown in FIG. 5 is known. The wedges have the same width a and b of the portions 4 'and 5' on both sides of the two folding lines 2 'and 3'.

[0003]

In the wedge for the compressor motor described above, when a magnet wire having good slippage is used in consideration of productivity, the wedge is displaced in the vertical direction (along the slot) by electromagnetic vibration. Since it occurs, it is one of the causes of a layer short and the like.

An object of the present invention is to prevent a wedge for a compressor motor from being displaced in a vertical direction (along a slot) due to electromagnetic vibration.

[0005]

SUMMARY OF THE INVENTION A wedge for a compressor motor according to the present invention is provided on the outer portions 4, 5 of the folding lines 2, 3.
Of these, the width a of the portion 4 on the coil group bending direction side is larger than the width b of the other portion 5.

A continuous unevenness 4a is formed on the edge of the portion 4 on the coil group bending direction side.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wedge for a compressor motor according to the present invention will be described with reference to FIGS.

The wedge 1 is made of a rectangular electric insulating paper having the same length as or slightly longer than the slot 6a of the stator core 6 of the compressor motor, and is provided at a small interval by two center folding lines 2 and 3 to form the stator core. The point of bending to the outer peripheral side of 6 is the same as the conventional one. In the present invention, in the set state, the width a of the portion 4 on the side of the bending direction (the direction of the arrow shown in FIGS. 1 and 2) of the coil group 7 is made larger than the width b of the other portion 5. I have. Note that the insulating paper 8 is also provided on the inner wall surface of the slot 6a.
Is provided.

In the coil group 7, the bending direction side is:
Since a larger force (contact pressure) is exerted on the wall surface of the slot 6a than on the opposite side, the width a of the portion 4 of the wedge 1 is made larger than the width b of the portion 5 so that the wedge 1 is set on the open side in the slot 6a. The portion 4 having the large width a comes into contact with the coil group 7 in a wide area and is strongly clamped. Therefore, the vertical movement of the wedge 1 is restricted.

[0010] In addition to such a configuration, as shown in FIG. 4, a continuous unevenness 4a such as a zigzag can be formed at the edge of the portion 4 having a large width a.

When the unevenness 4a is formed on the edge of the portion 4 having the large width a, the contact with the coil group 7 in the state of being set in the slot 6a is more reliable, and the effect of preventing the movement in the vertical direction is further enhanced. .

[0012]

Since the present invention is configured as described above, it has the following effects.

In other words, the part that exerts a large contact pressure, that is, the width of the part on the bending direction side of the coil group is increased, so that the part is strongly clamped by the coil group, and the movement in the vertical direction can be suppressed. The distance can be secured. In the case where irregularities are formed at the edge of the portion, a greater effect can be expected.

[Brief description of the drawings]

FIG. 1 is a plan view showing a part of a stator of a compressor motor incorporating a wedge of the present invention.

FIG. 2 is a view of a part of a stator of a compressor motor incorporating a wedge of the present invention as viewed from an inner peripheral side.

FIG. 3 is a view of a wedge for a compressor motor according to the present invention, wherein (1) is a developed plan view and (2) is a perspective view.

FIG. 4 is a view of another wedge for a compressor motor of the present invention, wherein (1) is a developed plan view and (2) is a perspective view.

FIG. 5 is a view of a conventional compressor motor wedge, wherein (1) is a developed plan view and (2) is a perspective view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wedge 2 Half-fold line 3 Half-fold line 4 Coil group bending part side 4a Unevenness 5 The other part 6 Stator core 6a Slot 7 Coil group

Claims (2)

[Claims] 1. A wedge for a compressor motor, wherein a width of a portion on a coil group bending direction side of two outer portions of a center folding line is larger than a width of another portion. 2. The wedge for a compressor motor according to claim 1, wherein a continuous unevenness is formed on an edge of a portion on a bending side direction of the coil group.