KR20170027307A - Single phase motor and electrical device using same - Google Patents

Abstract

Provided are a single phase motor and an electrical device. The single phase motor includes a stator and a rotor. The stator includes a stator core and a winding wound around the stator core. The stator core includes a yoke and two opposite pole parts. Each pole part includes a short pole piece and a long pole piece. The rotor is received in a space defined by the long pole pieces and the short pole pieces of two pole parts. The short pole piece of each pole part and the long pole piece of the opposite pole part are adjacently located. A slot opening is defined between the short pole piece of each pole part and the long pole piece of the opposing pole part. Each pole part includes the short pole piece and the long pole piece, thereby supplying a different starting ability to the motor along a clockwise direction and a counterclockwise direction. Accordingly, the present invention can reduce inductance and enhance a single directional starting ability of the motor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a single-

The present invention relates to a motor, and more particularly to an electric device using a single-phase motor and a single-phase motor.

The motor used in the prior art ventilation fan is generally a shaded-pole motor. This type of motor has low efficiency and low power factor, consumes large amounts of copper and iron, and is expensive.

Therefore, there is a demand for an electric device using a single-phase motor and a single-phase motor which can overcome the above-mentioned disadvantages.

In one aspect, a single-phase motor is provided with a stator and a rotor rotatable relative to the stator. The stator includes a stator core and windings wound around the stator core. The stator core includes two opposing poles connected to the yoke and the yoke. A short pole piece and a long pole piece extend from two sides of each pole piece toward the opposite pole piece. The rotor is accommodated in the space defined by the short and long poles of the two poles. The short pole pieces of each pole portion and the long pole pieces of the opposite pole portion are positioned adjacent to each other and define a slot opening therebetween.

Preferably, the two poles define two slot openings therebetween, and the line connecting the centers of the two slot openings is inclined with respect to the axis of symmetry of the stator core.

Preferably, the line connecting the centers of the two slot openings is inclined by an angle of 0 to 30 degrees with respect to the axis of symmetry of the stator core.

Preferably, the end faces of the short pole pieces and the long pole pieces of each pole portion facing the corresponding slot opening are parallel to a line connecting the centers of the two slot openings.

Preferably, said long pole piece of each pole piece has a beveled portion such that the radial thickness of said pole piece gradually decreases in a direction toward the corresponding slot opening.

Preferably, each pole defines a locating groove facing the rotor, the locating groove being offset from a center of the pole and positioned on an inner surface of the pole piece.

Preferably, the bottom of the positioning groove is arc-shaped.

Preferably, the outer circumferential surface of the rotor is located on the same circumference, and an air gap having a uniform thickness is defined between the short pole piece of the rotor and each pole piece and the inner surface of the long pole piece.

Preferably, the rotor includes a rotor main body, the rotor main body includes a magnetic member mounting bracket and a permanent magnet member, the permanent magnet member is mounted on an outer side of the magnetic member mounting bracket, The outer circumferential surface of the magnet member is located on the same circumference.

Preferably, the outer profile of the entire stator core is rectangular.

Preferably, the outer diameter of the rotor is 50% to 70% of the width of the stator core.

Preferably, the stator core includes a first core portion and a second core portion, wherein the two opposing poles are integrally formed with the first end of the first core portion and the first end of the second core portion, The second end of the first core portion and the second end of the second core portion are coupled together.

Preferably, the second end of the first core portion and the second end of the second core portion are coupled together by a magnetically conductive connecting piece.

Preferably, two dovetail grooves are defined in each of the second end of the first core portion and the second end of the second core portion, two opposite ends of the magnetically conductive connecting piece are formed as a dovetail ledge, Is fastened to the dovetail groove.

Advantageously, the rotor comprises a rotating shaft, a rotor body attached around the rotating shaft, and a buffering device contained within the rotor body. The rotor body and the rotating shaft are slidably fitted to each other. The buffering device has two ends connected to the rotating shaft and the rotor body for time delay synchronization of the rotational speed between the rotor body and the rotating shaft.

In another aspect, the present invention provides an electric device including the single-phase motor described in the above embodiment.

Preferably, the electric device is a ventilation fan, the ventilation fan includes an impeller, and the impeller is mounted on a rotary shaft of the rotor of the single-phase motor.

Preferably, the electrical device is a drain pump or a circulation pump.

Compared with the prior art, each pole portion of the single phase motor of the present invention provides a different starting capability along the clockwise anticounterclockwise direction, including shorter and longer poles on both sides of the pole portion. The short pole pieces of each pole piece and the long pole pieces of the other pole piece are positioned adjacent to each other and define a slot opening therebetween, which facilitates reducing the inductance and enhancing the unidirectional starting capability of the motor.

1 shows a ventilation fan according to an embodiment of the present invention.
Figure 2 shows the motor assembly of the ventilation fan of Figure 1;
Fig. 3 shows the insulation bracket of the single-phase motor of Fig.
Fig. 4 is a plan view of the stator core of the single-phase motor of Fig. 2;
5 is a plan view of the stator core and rotor of the single-phase motor of Fig. 2;
Figure 6 is an exploded view of the stator core of Figure 4;
Figure 7 shows the rotor of the single-phase motor of Figure 2;
Figures 8 and 9 are exploded views of the rotor of Figure 7;
Fig. 10 shows an electric device using the ventilation fan of Fig. 1;
Fig. 11 shows a circulation pump using the single-phase motor of Fig. 2. Fig.
Fig. 12 shows a drain pump using the single-phase motor of Fig. 2;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, embodiments of the present invention will be described in more detail with reference to the drawings.

Referring to FIG. 1, the ventilation fan 500 of the present invention includes an impeller 300 and a motor assembly 600. The motor assembly 600 includes a single-phase motor 100 and a drive circuit. The impeller 300 includes a mounting portion 301 mounted on one end of the rotary shaft 31 of the single-phase motor 100 so that the impeller 300 is driven to rotate by the rotary shaft 31. In this embodiment, the single-phase motor 100 is a single-phase synchronous ac motor. Compared with a conventional negative electrode motor, the single-phase motor of the present invention is compact and easy to repair and replace. The driving circuit includes a PCB board 200 mounted on the single-phase motor 100. In this embodiment, the impeller 300 is a centrifugal impeller and has an outer diameter that is significantly larger than the size of the single-phase motor 100.

2, the single-phase motor 100 of the motor assembly 600 includes a stator 20 and a rotator 30 rotatable relative to the stator 20. The motor 30 includes a rotor 30, The stator 20 includes a stator core 21, an insulation bracket 22 mounted on the stator core 21 and a winding 23 wound around the insulation bracket 22. In this embodiment, the PCB board 200 is mounted on one side of the insulating bracket 22 facing away from the impeller 300. This makes the structure of the single-phase motor 100 more compact and reduces the size of the single-phase motor 100. During the operation of the impeller 300, a low-pressure region is formed in the central region of the impeller 300, which allows external air to flow into the low-pressure region, and the single-phase motor 100, the PCB board 200, 23 are located in this low-pressure region. Therefore, a flow path exists between the PCB board 200 and the impeller 300, allowing air to flow through it. This airflow flows over the PCB board 200 and directly cools it, thereby extending the life of the PCB board 200. [ Since the outer diameter of the impeller 300 is significantly larger than that of the single-phase motor 100, the PCB board 200 can be sufficiently cooled. In another embodiment, the impeller 300 may also be an axial impeller.

The stator 20 further includes a first support bracket 24 and a second support bracket 25 mounted on two axial side portions of the stator core 21, respectively. The stator core 21 is made of a self-conducting material. The first support bracket 24 and the second support bracket 25 are configured to support the rotary shaft 31 of the rotor 30. [ The first support bracket 24 and the second support bracket 25 are connected to each other by an axial connection mechanism 26 to sandwich the stator core 21 between the first support bracket 24 and the second support bracket 25 Lt; / RTI > In this embodiment, each of the first support bracket 24 and the second support bracket 25 is an integrally formed portion, which is easy to manufacture. The bearing seats are respectively disposed in the first support bracket 24 and the second support bracket 25 for mounting the bearings 24a and 25a (Fig. 7). The two bearings 24a and 25a support the rotating shaft 31 so that the rotating shaft 31 is rotatable with respect to the stator 20. [

The connection mechanism 26 includes a screw 261, an associated screw nut 262, and a positioning sleeve 263. The first support bracket (24) and the second support bracket (25) define a through hole through which the screw (261) passes. A positioning sleeve 263 is attached around the screw 261 to position and support the first support bracket 24 and the second support bracket 25 in an axial direction and to improve the appearance, 24) and the second support bracket (25).

Referring to FIG. 3, in this embodiment, the insulating bracket 22 includes a first insulating bracket 221 and a second insulating bracket 226 integrally formed. The first insulating bracket 221 and the second insulating bracket 226 include main portions 222 and 227 integrally formed. Side plates 223a and 223b are formed at both ends of the main portion 222 and side plates 228a and 228b are formed at both ends of the main portion 227. [ The main portions 222, 227 are attached around the stator core 21. The winding 23 includes a first winding and a second winding each wound around the main portion 222, 227.

The upper ends of one side plate 223a and one side plate 228a of the first insulating bracket 221 and the second insulating bracket 226 form first mounting portions 224 and 229 protruding from each other. The upper ends of the other side plates 223b and 228b of the first and second insulating brackets 221 and 226 form second mounting portions 225 and 230 protruding respectively. The first mounting portions 224 and 229 and the second mounting portions 225 and 230 are configured for mounting the PCB board 200.

The first mounting portion 224 of the first insulating bracket 221 and the first mounting portion 229 of the second insulating bracket 226 are connected to the upper ends of the supporting portions 224a and 229a and the supporting portions 224a and 229a, Members 224b and 229b, respectively. The support portions 224a and 229a are flush with the side plates 223a and 228a. The connecting members 224b and 229b pass through the first through hole of the PCB board 200 to position and fix the PCB board 200 in a fixed manner. The upper ends of the support portions 224a and 229a abut on the bottom surface of the PCB board 200 to support the PCB board 200.

The upper end of the second mounting portion 225 of the first insulating bracket 221 abuts against the bottom surface of the PCB board 200 to support the PCB board 200. The second mounting portion 230 of the second insulation bracket 226 includes two parallel connection members 231 and 232 disposed on the support portion 233 and the support portion 233. The support member 233 abuts on the bottom surface of the PCB board 200 to support the PCB board 200. The ends of the two connecting members 231 and 232 are each formed of two barbs 234. The two connecting members 231 and 232 pass through the second through hole of the PCB board 200 and the barb 234 is engaged with the upper side of the PCB board 200 to hold the PCB board 200, 200 from being released.

4, the stator core 21 includes a generally U-shaped yoke 24 and two pole portions 211 extending from two opposing sides of the yoke 24 toward each other. The first insulating bracket 221 and the second insulating bracket 226 are mounted on two opposing side portions, respectively. Each pole portion 211 includes a short pole piece 211a and a long pole piece 211b extending from two sides of the pole piece 211. [ Due to the asymmetry of the pole 211, the single-phase motor 100 has a different starting capability in the opposite direction, i.e. the starting capability in the single starting direction is greater than the starting capability in the other starting direction. Between the bipolar portions 211, a short pole piece 211a of each pole piece 211 and a long pole piece 211b of the other pole piece 211 are positioned adjacent to each other and define a slot opening 212 therebetween. The center of the slot opening 212 is offset from the center line or symmetry axis L2 of the stator core 21 along the longitudinal direction of the stator core 21. [ The line L1 connecting the centers of the two slot openings 212 is inclined by an angle of 0 to 30 degrees with respect to the axis of symmetry L2. This design promotes an increase in magnetic reluctance between the bipolar portions 211, which reduces inductance, increases unidirectional starting capability and operation efficiency, and increases the power factor. In this embodiment, the end faces of the short pole piece 211a and the long pole piece 211b of each pole piece 211 facing each slot opening 212 are parallel to the line L1. The long pole piece 211b of each pole piece 211 has a beveled portion 211c so that the radial thickness of the long pole piece 211b gradually decreases in the direction toward each slot opening 212 to reduce the inductance, Thereby enhancing the unidirectional starting capability of the motor 100.

5, the rotor 30 is accommodated in a space defined by the short pole piece 211a and the long pole piece 211b of the bipolar part 211. [ Each pole piece 211 defines a locating groove 213 facing the rotor 30. The positioning groove 213 is offset from the center of the corresponding pole 211 and positioned away from the corresponding long pole piece 211b. This configuration is advantageous in that the difference in length between the long pole piece 211b and the short pole piece 211a of each pole piece 211 is further increased to further control the stop position of the rotor 30, Is offset from the dead point and makes it easier for the rotor 30 to start in one direction than the other. Preferably, the bottom of the positioning groove 213 is arc-shaped. It should be understood that the bottom of the locating groove 213 may be V-shaped.

The outer circumferential surface of the rotor (30) is positioned on the same circumference as viewed in the axial plane of the stator (100). The inner surface of the short pole piece 211a and the long pole piece 211b of each pole piece 211 is an arc-shaped pole surface curved inward. The pole faces of the short pole piece 211a and the long pole piece 211b are located on the same circumference as viewed in the axial plane. The pole faces of the short pole piece 211a and the long pole piece 211b are concentric with the outer circumferential face of the rotor 30. That is, the pole faces of the short pole piece 211a and the long pole piece 211b, All of the circumferential surfaces are centered on the center of the rotor (30). Therefore, an air gap 214 having a uniform thickness is defined between the short pole piece 211a, the long pole piece 211b, and the rotor 30, so that the circularity and safety and therefore the starting capability of the single- Can be improved.

In this embodiment, the slot opening 212 has a width greater than the thickness d3 of the air gap 214 (i.e., the distance between the short pole piece 211a and the long pole piece 211b on the opposite side of the slot opening 212) Respectively.

In this embodiment, the outer profile of the entire stator core 21 is rectangular in shape. The width of the stator core 21 is represented by W and the outer diameter of the rotor 30 is represented by D and the outer diameter D of the rotor 30 is 50% To 70%. This configuration reduces the size and cost of the single-phase motor 100, which makes the single-phase motor 100 more cost effective.

Referring to Fig. 6, the stator core 21 is in the form of a frame having an opening. The stator core 21 includes a first core portion 215 and a second core portion 216 connected by a magnetically conductive connecting piece 217. The main portion 222 of the first insulating bracket 221 and the main portion 227 of the second insulating bracket 226 are attached around the first core portion 215 and the second core portion 216, respectively.

The first end portion 215a of the first core portion 215 and the first end portion 216a of the second core portion 216 are formed of dovetail grooves 218a and 218b, respectively. Two opposite ends of the magnetically conductive connecting piece 217 are each formed of dovetail tenons 219a and 219b. The dovetail legs 219a and 219b are coupled to the dovetail grooves 218a and 218b so that the first core portion 215, the second core portion 216 and the self-conductive connecting piece 217 are connected and locked. The second end portion 215b of the first core portion 215 and the second end portion 216b of the second core portion 216 form respective two opposing pole portions 211. [

In this embodiment, both of the first core portion 215 and the second core portion 216 are F-shaped.

In another embodiment, both the first core portion 215 and the second core portion 216 are E-shaped.

The first core portion 215 and the second core portion 216 also have a dovetail groove / dovetail ledge at the first end 215a of the first core portion 215 and a first end 215a of the second core portion 216, Conductive connection piece 217 by fastening between the dovetail carcass / dovetail grooves in the carcass 216a.

7 to 9, the rotor 30 includes a rotating shaft 31, a rotor body 32, and a buffering device 35. [ A rotor body (32) is attached around the rotating shaft (31). The rotary shaft 31 is supported by two bearings 24a and 25a. The two bearings 24a and 25a are located outside the two ends of the rotor body 32. [ The rotor (30) is rotatable with respect to the stator (20). The rotor main body 32 includes a magnetic member mounting bracket 33 and a permanent magnet member 34. The magnetic member mounting bracket 33 is an injection-molded part. The permanent magnet member 34 is mounted on the outer side of the magnetic member mounting bracket 33 and the outer peripheral surface of the permanent magnet member 34 is positioned on the same circumference when viewed in the axial plane of the rotor.

Particularly, the rotor main body 32 and the rotating shaft 31 are sliding fit to each other in consideration of the rotational speed difference therebetween. The buffering device 35 is disposed within the rotor body 32 and is attached around the rotating shaft 31. In order to synchronize the rotational speed between the rotor main body 32 and the rotating shaft 31 with a time delay, the buffering device 35 is connected at one end to the rotor main body 32, The end portion is connected to the rotating shaft 31, which can effectively reduce or eliminate the occurrence of a starting failure or stall of the motor 100. [ The buffering device 35 is disposed inside the rotor main body 32 so that one end of the rotating shaft 31 of the single-phase motor 100 is directly connected to the load, which allows the motor 100 to have a more compact structure So that repair and replacement of the motor 100 are facilitated.

The magnetic member mounting bracket 33 of the rotor main body 32 includes a hollow cylindrical portion 36, a lower cover 37 fixedly attached around the lower end of the hollow cylindrical portion 36, And a sleeve ring 38 formed on the upper end of the sleeve ring 38. The pupil cylindrical portion 36 and the sleeve ring 38 are integrally injection-molded portions that are easy to manufacture. The permanent magnet member 34 is formed by two arcuate permanent magnet members 34a, 34b attached to the outer side of the pupil cylindrical portion 36. [ The two bearings 32a and 32b are mounted in the two ends of the hollow cylindrical portion 36, respectively. The two bearings 32a and 32b are slidably fitted with the rotary shaft 31, which causes the rotor body 32 to rotate freely with respect to the rotary shaft 31. [ The buffering device 35 is disposed between the two bearings 32a and 32b, which can prevent axial displacement of the rotor body 32. [

The sleeve ring 38 and the lower cover 37 have opposing grooves and the grooves 37a of the lower cover 37 are opposed to the grooves (not shown) of the sleeve ring 38. Both ends of the permanent magnet member 34 engage in the groove to position the permanent magnet member 34 axially.

The buffering device 35 includes an elastic member 351 and a first connection base 352 and a second connection base 353 connected to the two ends of the elastic member 351. The first connecting base 352 is movably attached around the rotating shaft 31 and the second connecting base 353 is fixed around the rotating shaft 31. The pupil cylindrical portion 36 surrounds the outer circumferential side of the buffer rung device 35. The first connection base 352 is connected to the pupil cylindrical portion 36. Specifically, in this embodiment, the first connection base 352 includes four circumferentially disposed protruding blocks 352a, and the inner wall surface of the pupil cylindrical portion 36 includes a first connection base 352 And a groove 36a engaged with the protruding block 352a for connecting to the pupil cylindrical portion 36. [

The rotor 30 further includes a restriction ring 39 fixedly attached to the rotary shaft 31 and disposed outside one end of the rotor body 32 away from the second connection base 353. Thus, the two ends of the rotor body 32 are position-limited by the second connection base 353 and the restriction ring 39, respectively. During operation of the single-phase motor 100, the confinement ring 39 limits the rotor body 32 axially, which prevents axial movement of the rotor body 32.

In this embodiment, the buffering device 35 further comprises an elastic sleeve 354. The sleeve 354 is disposed on the inner surface of the hollow cylindrical portion 36 and surrounds the outer circumferential side surface of the elastic member 351. The two ends of the sleeve 354 are fixedly connected to the first connection base 352 and the second connection base 353, respectively. Preferably, the material of the sleeve 354 is a soft material such as rubber or foam plastic, on the one hand achieving shock absorption and noise reduction results, and on the other hand, when the outer diameter of the elastic member 351 increases Thereby preventing the elastic member 351 from directly colliding against the hollow cylindrical portion 36.

In this embodiment, the elastic member 351 is a helical spring movably attached around the rotating shaft 31. [ When the motor 10 starts to start, the rotor main body 32 rotates under the driving of the electromagnetic force of the stator 20. One end of the rotary shaft 31 is directly connected to the load so that the rotary shaft 31 has a large inertia and the rotary shaft 31 is slidably fitted with the rotor main body 32. Therefore, at this time, the rotational speed of the rotor main body 32 is larger than the rotational speed of the rotating shaft 31, that is, there is a rotational speed difference between the rotor main body 32 and the rotating shaft 31. [ The helical spring is pulled by the rotation of the rotor body 32 so that the end of the helical spring connected to the first connection base 352 is tightened as its inner diameter gradually decreases. As a result, the end of the helical spring connected to the second connection base 353 is also gradually tightened, and the rotational speed of the rotating shaft 31 is consequently synchronized with the rotational speed of the rotor main body 32, Phase motor 100 that is caused by the load on the motor. The rotating speed of the rotating shaft 31 is larger than the rotating speed of the rotor main body 32 due to the large rotational inertia of the load when the motor 100 is stopped from the operating state, The rotational speed difference exists between the rotating shafts 31 and the end of the helical spring connected to the second connecting base 353 is gradually released as its inner diameter gradually increases. As a result, the end of the helical spring connected to the first connection base 352 gradually loosens, and the rotational speed of the rotor body 32 is consequently synchronized with the rotational speed of the rotary shaft 31, so that the load can be effectively reduced have. During this process, the sleeve 354 surrounds the helical spring, which prevents the helical spring from being damaged due to an excessive increase in its inner diameter.

The single-phase motor 100 of the present invention has a compact structure, and has advantages such as strong unidirectional starting capability, high working efficiency, high power factor and low price. Therefore, the ventilation fan 500 using the single-phase motor 100 of the present invention has high working efficiency, low cost and long service life.

The single phase motor 100 of the present invention can be used in an electric device such as a warm air machine with a unidirectional starting requirement of the single phase motor 100, an air conditioner drain pump 900 or a circulation pump 800 11 and 12).

Fig. 10 shows an electric device 700 using the ventilation fan 500 of the present invention. The electric device 700 includes an outer housing 701 and a mounting bracket 702 disposed inside the outer housing 701. [ The ventilation fan 500 is mounted on the mounting bracket 702. The electric device 700 using the ventilation fan 500 of the present invention has a high working efficiency, a long life and a low price. The electrical device 700 may be, for example, an air vent, a vent and cooling device, a range hood, and the like.

While the present invention has been described with reference to one or more preferred embodiments, those skilled in the art will appreciate that various modifications are possible. The scope of the invention will, therefore, be determined with reference to the following claims.

Claims (13)

As a single phase motor:
A stator comprising a winding wound around a stator core and a stator core, the stator core comprising two opposing poles connected to the yoke and the yoke, wherein the short pole piece and the long pole piece extend from two sides of each pole piece to opposite poles The short pole pieces of each pole piece and the long pole pieces of the opposite pole piece being positioned adjacent to each other and defining a slot opening therebetween; And
A rotor rotatable with respect to the stator, the rotor being accommodated in a space defined by the short and long poles of the two poles;
. The single-phase motor of claim 1, wherein the two poles define two slot openings therebetween, and the line connecting the centers of the two slot openings is inclined with respect to the axis of symmetry of the stator core. The single-phase motor according to claim 2, wherein the line connecting the centers of the two slot openings is inclined by an angle of 0 to 30 degrees with respect to the axis of symmetry of the stator core. The single-phase motor according to claim 2, wherein the end faces of the short pole piece and the long pole piece of each pole portion facing the corresponding slot opening are parallel to a line connecting the centers of the two slot openings. The single-phase motor of claim 1, wherein the long pole piece of each pole portion has a beveled portion such that the radial thickness of the pole piece gradually decreases in a direction toward the corresponding slot opening. The single-phase motor of claim 1, wherein each pole defines a locating groove facing the rotor, the locating groove being offset from a center of the pole and located on an inner surface of the pole piece. The single-phase motor according to claim 1, wherein the outer circumferential surface of the rotor is located on the same circumference, and an air gap having a uniform thickness is defined between the short pole piece of the rotor and each pole piece and the inner surface of the long pole piece. The single-phase motor according to claim 1, wherein the outer profile of the entire stator core is rectangular and the outer diameter of the rotor is 50% to 70% of the width of the stator core. The stator core of claim 1, wherein the stator core comprises a first core portion and a second core portion, the two opposing poles being integrally formed with a first end of the first core portion and a first end of the second core portion, respectively The second end of the first core portion and the second end of the second core portion are coupled together. The single-phase motor according to claim 9, wherein the second end of the first core portion and the second end of the second core portion are coupled to each other by a magnetically conductive connecting piece. The rotor of claim 1, wherein the rotor comprises a rotating shaft, a rotor body attached around the rotating shaft, and a buffering device contained within the rotor body, wherein the rotor body and the rotating shaft are slidingly and wherein the buffering device has two ends connected to the rotating shaft and the rotor body for time delay synchronization of the rotational speed between the rotor body and the rotating shaft. The electric device according to any one of claims 1 to 11, wherein the electric device is a ventilation fan, the ventilation fan includes an impeller, and the impeller is connected to a rotating shaft of the rotor of the single- Wherein the electrical device is mounted. An electric device comprising the single-phase motor according to any one of claims 1 to 11, wherein the electric device is a drain pump or a circulation pump.

Images