JPS58376Y2 - Sokudokirikaemakisenzukitansouyuudoudendouki - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a single-phase induction motor with a speed switching winding.

Conventionally, the connection of the speed switching winding in this type of electric motor is constructed by incorporating the speed switching winding 2 into the main winding 1 as shown in Figure 1, or by incorporating the speed switching winding 2 into the main winding 1 as shown in Figure 2. One of the auxiliary windings 3 and 3', which is different from the winding 1, is the auxiliary winding 3.
Two embodiments are known in which ' is constructed as a speed switching winding.

However, in such a configuration, it is undeniable that the speed switching winding is inserted into the same groove as other windings, and the windings are inserted in the same groove or between the windings in contact with each other. Since the potential difference between the windings at the wire ends becomes high and there is a risk of short circuit between each winding, it is usually constructed with insulating paper interposed between the speed switching winding and other windings. There is.

Therefore, since the work of inserting the insulating paper is indispensable, this is a drawback that prevents the mechanization of the winding work of the single-phase induction motor with winding for speed switching.

Therefore, the present invention adopts a connection configuration in which the speed switching winding and the highest speed winding are inserted into grooves of different poles of the stator core, and between each winding in the same groove and between each winding. This eliminates the risk of short circuits at the ends of the wires, and eliminates the need for insulating paper in the grooves and at the ends of the windings, which were required in the conventional construction, simplifying the construction and improving the efficiency of this type of motor. It was devised to reduce costs by enabling mechanization of winding and promoting mass production.

A specific embodiment of the present invention will be described below with reference to the drawings. First, FIG. 3 shows the arrangement relationship between the main winding 1 and the speed switching winding 2 in the conventional embodiment shown in FIG. 1 using symbol coils. This is what I did.

The embodiment of the present invention is shown in FIG. 3, in which the main winding 1 has two windings 1a every other pole.

1b are connected to the north pole side of the same polarity, and the speed switching winding 2 is arranged on the south pole side of the vacant part corresponding to the virtual pole of the main winding.

Therefore, with this configuration, the main windings 1a, 1b and the speed switching winding are never placed in the same bottom groove of the stator core, and the risk of force short circuit can be eliminated, and as a result, the insulating paper Since insertion can be made unnecessary, the work necessary for configuring the windings of this type of motor can be simplified.

In addition, since there is no need to use conductors with special thick coatings, it is possible to promote the mechanization of winding, which, together with the above effects, improves mass production and reduces the price of this type of motor. can.

[Brief explanation of drawings]

Figures 1 and 2 are wiring diagrams of a conventional single-phase induction motor with a speed switching winding, and Figure 3 is a diagram showing the arrangement of the main winding and speed switching winding in Figure 1 using symbol coils. Figure, 4th
The figure is a configuration diagram showing an embodiment of the present invention in correspondence with FIG. 3. 1a and 1b are main windings, and 2 is a speed switching winding.

Claims (1)

[Scope of utility model registration request] In a single-phase induction motor in which a low-speed switching winding is provided in series with a high-speed winding in a separable manner, the high-speed winding is inserted into a groove of a single-force pole of a stator core and connected to have the same polarity. A single-phase induction motor with a speed switching winding, characterized in that the low speed switching winding is inserted into a groove of a passive pole of a stator core and connected to a polarity opposite to that of the high speed winding.