JPS602041A - Molded submerged motor - Google Patents

Abstract

PURPOSE:To improve a corrosion resistance and productivity and resuce a size and weight by a method wherein the outside circumference of a coil, a core and a slot part of a stator is molded with a thermosetting resin and a metal thin film layer and a thermoplastic resin layer are provided to the circumference of the thermosetting resin layer. CONSTITUTION:The surface of a coil 1 and a core 2, which compose a stator, is covered with a molded layer 3 and the molded layer 3 is solidly formed with a thermosetting resin material such as a phenol resin, epoxy resin and a saturated polyester resin. A metal thin film layer 4 such as an aluminum film and an iron film is wound around the molded stator and then made adhere with an epoxy resin or the like and is provided in order to prevent the internal coil 1 from coming off. A thermoplastic resin layer 5, for instance a thermoplastic shrinkable tube, is provided to the outside circumference of the metal thin film layer 4 in order to protect the metal thin film layer 4 from corrosion.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a submersible electric motor, and in particular to improvements to improve corrosion resistance and productivity, and to achieve smaller size, lighter weight, and lower resolution.

In recent years, transformers, current transformers, switches, capacitors, transistors, small electric motors, etc. using thermosetting molding materials have been produced for the purpose of improving the productivity, customization, and functionality of electrical equipment.

For example, in small electric motors of 100W class or less, part or all of the stator core and coils are made of unsaturated polyester BMO (Bulk Molding Oom).
pounds), phenol open side.

It is integrally molded by transfer molding or injection molding using a thermosetting molding material such as epoxy resin.

On the other hand, in submersible electric motors used underwater, the moisture permeability of plastic poses problems such as shortened insulation life and reduced mechanical strength when used underwater. No electric motor is proposed.

Therefore, an object of the present invention is to provide a completely molded underwater electric motor, and the underwater electric motor according to the present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a sectional view of essential parts of an embodiment of a molded submersible electric motor according to the present invention, particularly showing the stator section. In the figure, 1 is a coil, which is wound around a core 2. 3 is a mold layer, which is made of pheno-/V resin;
It is molded from a thermosetting resin material such as epoxy resin or unsaturated polyester toilet fat. Reference numeral 4 denotes a metal thin film layer made of aluminum, iron, etc., which is wound around the outer periphery of the mold skirt and then bonded with epoxy resin or the like, and is provided to protect the internal coil 1 from coming off. ing. Reference numeral 5 denotes a thermoplastic resin layer provided on the outer peripheral surface of the metal thin film layer 4 to protect it from corrosion, and is made of, for example, a thermoplastic shrink tube. 6 is a can, and 7 and 8 are insert screws and airtight terminals provided in the mold layer 3.

The underwater electric motor constructed in this way is constructed by integrally molding the coil 1 core 2 and slot portion using a thermosetting material such as phenol resin, epoxy resin, or unsaturated polyester resin, and then wrapping a thin metal film around the outer periphery. Since the molded stator is constructed by turning the stator into contact with each other and covering the outer periphery with a thermoplastic shrink tape, a decrease in the insulation life S and a decrease in mechanical strength due to moisture permeation are prevented.

Next, a life estimation test of the molded stator with the above configuration will be explained. Figure 2 shows a molded magnet twisted pair with an insulation structure almost equivalent to that of the actual machine used in the life estimation test. Molded mold layer 12 is the mold layer 11
A metal thin film layer 13 made of aluminum, iron or the like is wound around the outer periphery of the metal thin film layer 12 and fixed by adhesive, and 13 is a corrosion-resistant thermoplastic resin layer covering the outer periphery of the metal thin film layer 12. 14 is two twisted magnet wires. Here, the thickness of the mold layer 11 is
The thickness is set to be the same as that of the mold layer 3 in the stator of the actual machine, so that the test results are equivalent to those of the actual machine.

FIG. 3 is a sectional view of a main part of a test device for estimating the life of a two-strand twisted test piece of the molded magnet wire. In the figure, 15 is a molded magnet wire twisted pair, 16 is a water tank that accommodates this molded magnet wire twisted pair, and 17 is a 60 which is fed into the water tank 16 via a water pipe 18 and then discharged via a drain pipe 19. -80°C hot water, 20.21 is a magnet wire, and 22 is putty to prevent hot water from fading.

Using such a device, the magnet wires 20 and 21 are
With 200 to 700V applied between the
When a V-1 characteristic test was conducted without circulating hot water of 0 to 80 DEG C., the results shown in FIG. 4 were obtained. In the same figure, A is the V-t% property when the outer periphery of the magnet wire is molded, the outer periphery is covered with a thin metal film, and the outer periphery is covered with thermoplastic side fat, and straight line B is the V-t% property of the magnet wire. V − in a twisted pair of wires
t% property. It is also clear from Figure 4 that the assembly of the mold layer, metal thin film layer 2, and thermoplastic resin layer into the sphere makes it softer and longer than the wire alone. .

As explained above, 1 ml of mold water according to the present invention
In one machine, the stator coil, core 2, and outer periphery of the slot part are integrated by molding using a thermosetting material, and a metal thin film layer and a thermoplastic resin layer are provided on the outer periphery. In addition, it has the excellent effect of improving corrosion resistance, productivity, and easily achieving lower image quality with a small and light punch.

[Brief explanation of drawings]

Fig. 1 is a sectional view of essential parts showing an embodiment of a molded submersible motor according to the present invention, Fig. 2 is a side view of an example of a molded magnet wire twisted pair equivalent to the molded submersible motor, and Fig. 3 is a life test device. FIG. 4 is a cross-sectional view of a main part showing an example of the apparatus, and FIG. 4 is a diagram showing the results of a life test using the apparatus shown in FIG. DESCRIPTION OF SYMBOLS 1... Coil, 2... Core, 3... Mold layer, 4... Metal thin film, 5... Thermoplastic i-fat layer, 6... Can, 7... ...insert screw, 8.
...Airtight terminal. Agent: Masuo Oiwa (2 others) 1. Country f. 2. National jurisdiction a. Written amendment to the effect (voluntarily) Commissioner of the Japan Patent Office 1. Indication of the case: Japanese Patent Application No. 1986-108621. 2. Name of the invention: Molded submersible motor 3. To the person making the amendment Representative Hitoshi Katayama Part 4, Agent 5, Subject of amendment (1) Column 6 for detailed explanation of the invention in the specification, Contents of amendment (1) Guest in the specification, page 2, line 9, `` "Problem" instead of "Problem"
and correct it. (2) On page 3, line 4, the word "outside" is corrected to "outside water." (3) On page 3, lines 5 and 6, the phrase ``carry out corrosion protection'' is amended to read ``corrosion prevention''. (4) On page 3, line 8 of the same page, replace “It is being done.”
It is made. ” he corrected. (5) Correct the phrase “moisture permeable” on the 17th line of the third page of the same page to “moisture permeable j.” (6) Correct the phrase “two convulsions” on the fourth page, line 9 of the same page to “twisted pair.” and correct it. (7) On page 4, lines 13-14, the phrase "two-piece rubbing" is corrected to "twisted pair."

Claims (1)

[Claims] A mold layer using a thermosetting resin material that covers and integrates the surfaces of the coil, core, and slot portion that constitute the stator of the underwater motor, and a metal thin film layer provided on the outer periphery of the mold layer; A molded submersible motor characterized by having a thermoplastic resin layer covering the outer periphery of the 1 g thin metal layer.