JPH07227056A - Molded motor - Google Patents

Abstract

PURPOSE:To provide a motor with a stator the whole body of which is formed by molding a resin by forming its stator winding of a self-welding wire instead of using varnish. CONSTITUTION:The stator core 1, stator winding 2 which is wound around the core 1 and formed of a self-welding wire 6, and coil end section of the winding 2, and housing 4 fitted with terminals 3 of a stator are integrally molded with a thermosetting resin 5. Therefore, the manufacturing process of the stator can be shortened and the coming out of the winding 2 and adhesion of varnish to the terminals 3 can be eliminated. In addition, the fixing strength of the winding 2 can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly to a motor in which a stator winding portion is molded with resin as an alternative to varnish treatment.

[0002]

2. Description of the Related Art Conventionally, a stator winding is housed in a slot of a stator core laminated to a predetermined thickness by a coil inserter or the like, and the coil end portion is shaped into a prescribed shape. , The fixation of the winding is fixed by binding the winding wound around the stator core with a binding thread,
The lead wire was attached and the varnish was processed. In this varnish treatment, the stator winding wound around the stator iron core is integrally fixed by coating and impregnating the entire stator with varnish for the purpose of preventing moisture and vibration. As described above, it is difficult to rationalize the manufacturing process of the stator because the manufacturing process is complicated and automation is difficult, and it takes several hours to process the varnish. In this processing step, the binding thread is manually performed because the number and shape of the connection are not uniform, which causes a manufacturing problem that requires a lot of labor and man-hours. In the varnish processing step,
There is a problem in that it takes a long time to cure and dry the varnish, and there is a problem of odor and pollution due to volatilization of the solvent during the drying.

[0003]

However, as described above, when the windings are fixed by the binding yarns, there is a problem that the binding strength of the windings is inferior because the windings cannot be bound over the entire windings due to its binding workability. Further, if the winding is fixed by impregnating it with varnish, the amount of varnish impregnated varies depending on the location of the winding due to the workability of the varnish, and there is a problem that the fixing strength of the winding is poor due to the lack of stability of quality. . Moreover, when molding a stator having a winding wound by concentric winding, it is necessary to apply a varnish treatment to prevent the winding from protruding due to the molding pressure. The present invention has been made in view of the above circumstances, and an object thereof is to provide a mold motor using a self-bonding wire for a stator winding as an alternative to improvement of fixing strength and varnish treatment. To provide.

[0004]

According to the present invention, a winding formed by a self-bonding wire having a structure in which a self-bonding layer is applied to an outermost shell layer is wound in a slot of a stator core, The above object is achieved by eliminating the varnish treatment and molding the stator winding with a resin, thereby simultaneously performing insulation treatment of the winding and fixing of the winding.

[0005]

[Operation] Since the self-bonding wires are fixed to each other by adhesion of the outermost shell layer, the fixing strength of the winding is substantially uniform over the entire winding. Then, since the winding is molded with resin, the fixing strength of the winding can be improved and also the self-bonding wire separated from the winding can be fixed.

[0006]

An embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the stator of the mold motor which is the object of this embodiment is composed of a stator core 1 and a stator winding 2. The stator core 1 is formed in a substantially cylindrical shape, and a semi-closed slot (not shown) is formed on the circumferential surface thereof, and the stator winding 2 is formed in the semi-closed slot (not shown). Is wound in an insulated state. The stator winding 2 is prevented from being damaged by the mechanical vibration or the electromagnetic vibration generated during the operation of the motor so that the insulation state of the stator winding 2 with respect to the stator core 1 is deteriorated and the motor is not burned. It is fixed. Further, a housing 4 having a terminal 3 is attached to a coil end portion of a stator winding 2 wound around a stator iron core 1 and then molded with a thermosetting resin 5 such as polyester resin. .

For example, in a case where a stator having a concentric winding is used as a molded motor after molding using a thermosetting resin 5, the coil end portion of the concentric winding type stator is Since the volume is larger than that of direct winding or toroidal winding, if molded with thermosetting resin etc. as it is, the winding will be exposed on the surface of the mold due to the injection pressure of the resin and it will be a defective product. It is common to mold after applying.
However, in the leadless type as in the present invention, the housing 4 with terminals is generally used. In this case, the terminal 3 or the housing 4 must be treated so that the varnish does not adhere to it. However, the management is very troublesome, and the deformation of the housing due to heat is also a problem.

In order to solve the above-mentioned problems, the feature of the present invention is to fix the stator winding 2 by first fixing the stator winding 2 to the outermost shell layer which is the outer peripheral surface of the insulating coating layer which is the outer shell layer of the wire. A stator winding 2 formed from a self-bonding wire 6 having a structure in which a thermosetting self-bonding layer having adhesiveness is applied to the stator core 1 is wound in the slot (not shown) of the stator core 1, After performing a predetermined shaping operation, dry and cure with hot air, and after fixing the stator winding, the whole stator is molded by using thermosetting resin and fixed. It is possible to obtain a high-quality molded product in which the child winding does not protrude and the varnish does not adhere to the terminals. In the case of a self-bonding wire having a structure in which a thermoplastic self-bonding layer is applied, the coil end portion is softened by the heat during molding and loses the molding pressure, resulting in an insufficient effect.

Therefore, according to this embodiment, since the stator winding 2 is formed by the adhesion of the self-bonding wires 6 to each other, the stator winding 2 can be fixed with a substantially uniform fixing force. It is possible to stabilize quality such as fixing strength and insulation.
In addition, after that, the whole stator including the stator winding 2 is molded with the thermosetting resin, so that the fixing strength of the stator winding 2 is improved, and mechanical vibration and electromagnetic waves of the stator winding 2 are increased. Vibration can be reduced, burnout of the motor can be prevented, and rust of the stator core due to varnishless self-bonding wire can be prevented, so that reliability as a motor is also improved. The mold work is performed by injection molding or the like in order to shorten the work time. According to such a method, the resin is cured by pressurization and heating, so that the curing can be completed within 10 minutes, so that the time can be significantly shortened as compared with the varnish treatment.

[0010]

As described above, according to the present invention, the self-bonding wire is used for the stator winding and the whole stator is resin-molded, so that the process using the binding yarn or the varnish is rationalized. The manufacturing process such as drying for a long time and the pollution problem caused by solvent etc. can be significantly reduced, the process can be omitted by mechanization, the manufacturing process of the stator can be significantly shortened, and the stator winding can be protruded. No varnish is attached to the terminals and terminals, the fixing strength of the stator winding can be dramatically improved, mechanical vibration and electromagnetic vibration can be reduced, motor burnout can be reduced, insulation failure, etc. It is possible to provide a mold motor having a high reliability without the danger of, and its industrial effect is great.

[Brief description of drawings]

FIG. 1 is a structural view of a stator of a molded motor according to an embodiment of the present invention.

[Explanation of symbols]

 1 Stator core 2 Stator winding 3 Terminal 4 Housing 5 Thermosetting resin 6 Self-bonding wire

Claims (1)

[Claims] 1. A stator core laminated to a predetermined thickness, a stator winding formed by a self-bonding wire wound around the stator core, and connected to a winding end of the stator winding. A mold motor having a housing with a terminal, and a coil end portion of the stator winding, the housing with a terminal and the stator core are integrally molded with a thermosetting resin.