JPS63299733A - Capacitor motor - Google Patents

Abstract

PURPOSE:To easily and effectively form a fine winding and to enhance reliability by forming a winding on a bobbin, engaging a star-shaped tooth section therewith to form a stator. CONSTITUTION:A connector 1 integral at its bore side is formed, and a tooth section 3 of star-shaped 8 slots made of a magnetic path 2 protruding from the connector 1 radially outward is formed. A cylindrical yoke 4 is attached to the outer periphery of the tooth section 3. Further, a hollow bobbin 5 is provided to engage with the projecting path 2 in the section 3. Windings 6 of main and auxiliary windings are formed on the bobbin 5 in separate steps. The bobbin 5 in which the windings 6 are formed is attached to the section 3, which is engaged with the yoke 4, the winding 6 is further connected by a printed substrate 8, leads 9 are extended externally, and the whole is molded with resin.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a capacitor motor having a main winding and an auxiliary winding arranged on a bobbin.

``Conventional technology'' In a capacitor motor, in which an auxiliary winding and a capacitor are connected in series, and a main winding is connected in parallel, the windings are wound around a stator core that has many teeth protruding toward the inner diameter. It was something.

Such a capacitor motor has a large number of slots formed between the teeth of the stator, and it is not easy to provide main windings and auxiliary windings in these slots.

For this reason, attempts were made to reduce the number of slots, but there were many torque irregularities and vibrations, and this tendency became stronger when the gap between the stator and rotor was reduced to improve operating efficiency. There is a limit to how much can be reduced, and the result was that it was not desirable for an electric motor used in quiet equipment.

Therefore, as a conventional special motor configuration, the teeth, which were integral on the outer diameter side and protruded toward the inner diameter side, were formed into a star shape with the outer diameter side integrated and the outer diameter side open, so that the windings could be connected from the outer diameter side. Attempts have been made to make winding easier, and they have been effective in making winding easier.

However, if a yoke that forms a magnetic path between the teeth is installed on the outer diameter side after winding the star-shaped teeth, the windings are likely to be damaged, resulting in poor insulation. A failure such as a disconnection has occurred.

In such a state, when the power supply voltage is high, the windings become thinner, which causes a rapid increase in the occurrence of defects, making the device impractical.

On the other hand, in a capacitor motor, the air gap formed between the rotor and the stator affects the operating efficiency, so efforts have been made to make this air gap as small as possible.

However, although reducing the gap improves efficiency, it also makes machining difficult, and because magnetic flux is unevenly distributed in the teeth, vibration tends to occur and noise tends to increase.

For this reason, conventionally, this gap has been set to about 0.1 to 0.25 shoes.

"Problems to be Solved by the Invention" The present invention has been made in view of these circumstances,
The objective is to obtain a capacitor motor that has quiet operating characteristics, is easy to wind, and does not suffer from poor insulation or disconnection.

"Means for Solving the Problems" The present invention comprises a stator core consisting of a star-shaped toothed part and a cylindrical yoke part surrounding this toothed part, and the main winding and auxiliary winding are mounted on a bobbin. The problem is solved by applying the screws and fitting them into the teeth.

``Function'' The teeth are star-shaped and the inner diameter side is integrated, and the cylindrical yoke is housed on the outer diameter side, so the main winding and auxiliary windings are respectively applied to the bobbin and the teeth are integrated. It can be attached to.

The main and auxiliary windings applied to the bobbin can be applied in a separate process and at high speed, unlike when applied directly to the teeth.Furthermore, since they are applied smoothly, there is no possibility of defects. Occurrence almost disappears.

Therefore, it becomes possible to apply thin windings without defects.

The bobbin attached to the toothed portion is fixed to the toothed portion without falling off since the yoke portion is attached to the outer diameter side of the toothed portion.

Further, since the inner diameter side of the tooth portion is integrated, the magnetic flux acting on the rotor is dispersed, so that vibrations such as torque unevenness are reduced.

Embodiment The present invention will be described based on an embodiment shown in the drawings. The figure is an exploded view showing an assembled structure of a capacitor motor according to the present invention.

In the figure, the capacitor motor has a connecting part 1 whose inner diameter side is integrated, and a star-shaped eight-slot tooth part 3 consisting of a magnetic path 2 protruding from the connecting part 1 in the outer diameter direction. .

A cylindrical yoke portion 4 is attached to the outer diameter side of the tooth portion 3.

Further, the tooth portion 3 is provided with a bobbin 5 formed hollow so as to be able to fit into the protruding magnetic path 2.

This bobbin 5 is provided with windings 6, which serve as a main winding and an auxiliary winding, in separate steps.

A plurality of terminals 7 are formed on the bobbin 5,
It is configured such that the inside of the winding 6 is connected.

Roughly speaking, the bobbin 5 is configured such that after being attached to the tooth portion 3, a terminal 7 is connected and a printed circuit board 8 is attached. The lead wire 9 is connected thereto.

In addition, the bobbin 5 is configured such that the outer diameter side collar is larger than the inner diameter side collar a, so that an additional winding 6 can be applied on the outer diameter side, and the main winding and the auxiliary winding are It is configured so that it can be applied all together or separately.

The tooth portion 3 and the yoke portion 4 are composed of a dovetail 10 and a dovetail groove 1.
In particular, the dovetail groove 11 is formed into an Ω shape, and the dovetail 10 is formed so as to be tightly fitted into the dovetail groove 11.

Furthermore, the bobbin 5 on which the winding wire 6 has been applied is attached to the tooth portion 3,
After the tooth portion 3 is fitted into the yoke portion 4 and the winding 6 is connected via the printed circuit board 8, the entire structure is molded with resin so that the lead wire 9 is guided outside.

Although not shown in the drawings, resin molding can be performed using conventional techniques, and the tooth portion 3 assembled in the molding die is
After storing the materials, thermosetting resin is injected and heat molded.

The resin is composed of a material containing a large amount of inert material and having good heat dissipation and insulation properties, which is also conventional technology.

In addition, (a) in the figure shows the shape of the bobbin 5 when the number of terminals 7 increases by winding an auxiliary winding, etc., and (b) in the figure shows the shape of the bobbin 5. FIG.

In such a configuration, the capacitor motor has teeth 3
The yoke portion 4 is formed by laminating beaten steel plates, and the bobbin 5 is formed by molding and manufacturing from a material such as nylon, and a winding 6 is applied thereto.

When winding the wire 6, by rotating the bobbin 5 at high speed with a rotating machine, it is easy to wind the wire with a small diameter I! 6
But it can be done easily and reliably.

Then, as the bobbin 5 rotates and the winding 16 is applied, the winding 16 is wound tightly and the winding 6 is wound in such a way that no scratches or the like occur on the winding 6. can eliminate obstacles.

When applying the winding 6, since the flange on the outer diameter side of the bobbin 5 is formed to be large, the winding 6 is distributed tilted toward the outer diameter side by applying an extra amount on the outer diameter side. become,
The windings 6 can be effectively applied between the radially projecting magnetic paths 2, and the winding density in the toothed portions 3 can be increased.

After the winding wire 6 is wound around the bobbin, the end portion thereof is connected to the terminal 7 provided on the bobbin 5, but the steps up to this point can be performed in a separate step regardless of the tooth portion 3. Thus, bobbins 5 having wire wound thereon can be produced in large quantities.

Although a considerable amount of pressing force is required to fit the teeth 3 into the yoke 4, the fitting can be achieved by positioning the dovetail 10 so as to fit into the dovetail groove 11 and pressing the dovetail 10 with a press or the like.

In this case, the dovetail 10 is placed adjacent to the winding 6, but since the winding 6 is attached to the bobbin 5 and a flange is formed, it is possible to block the negative influence on the winding 6. This will not cause any defects in the wire 6.

Furthermore, when the bobbin 5 is fitted into the magnetic path 2 of the tooth portion 3,
It does not need to be press-fitted, but may be loosely fitted, and since it is fixed by molding with resin, it does not swing or cause vibration or torque unevenness.

In addition, a high-density structure is obtained by forming an extra winding 6 on the bobbin 5 in the outer diameter direction, fitting it into the radial magnetic path 2, and molding these together with resin. It is possible to construct a compact, high-output capacitor motor.

Roughly speaking, in terms of manufacturing, since the tooth portion 3 is radially abutted and fitted to the inner diameter side of the yoke portion 4, the inner diameter side of the tooth portion 3 is The roundness is improved, there is no difficulty in reducing the gap with the rotor, and manufacturing is facilitated.

The gap formed on the inner diameter side of the tooth portion 3 between the rotor and the rotor may be adjusted by mechanical cutting, but even if the gap is large and the loss increases, it will not be possible compared to the conventional winding method. In the winding method in which the wire is wound around the tooth portion 3 by the bobbin 5, the copper loss of the winding wire 6 is extremely reduced, so the efficiency is greatly improved, and as a result, deterioration in efficiency is reduced.

, ``Effects of the Invention'' According to the present invention, since the stator is formed by winding the bobbin and fitting it into the star-shaped teeth, even a thin wire can be wound easily and reliably. A high capacitor electric motor can be constructed.

[Brief explanation of drawings]

The figure is an exploded view showing the assembly structure of a capacitor motor according to the present invention. 2...Magnetic path, 3...Tooth part, 4...Yoke part,
5...Bobbin, 6...Winding, 7...Terminal,
8...Printed circuit board.

Claims (1)

[Claims] In a capacitor motor in which the main winding is connected in parallel to the series connection of the auxiliary winding and the capacitor, the stator core is composed of star-shaped teeth and a cylindrical yoke surrounding the teeth,
A capacitor motor characterized in that a main winding and an auxiliary winding are provided on a bobbin and fitted into the teeth.