CN1722574A - External rotor type induction motor - Google Patents
External rotor type induction motor Download PDFInfo
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- CN1722574A CN1722574A CNA2005100859694A CN200510085969A CN1722574A CN 1722574 A CN1722574 A CN 1722574A CN A2005100859694 A CNA2005100859694 A CN A2005100859694A CN 200510085969 A CN200510085969 A CN 200510085969A CN 1722574 A CN1722574 A CN 1722574A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/30—Driving arrangements
- D06F37/304—Arrangements or adaptations of electric motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Textile Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Induction Machinery (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
Disclosed is an outer rotor type induction motor. The present invention includes a driving shaft, a stator core fixed to a frame and having a plurality of stator slots so that the driving shaft penetrates a center of the stator core, a coil wound on the stator slots so as to form a rotatory magnetic field, a rotor housing installed outside the stator core so as to maintain a predetermined slit with the stator core wherein the driving shaft is coupled through a bottom center of the rotor housing, a rotor conductor coupled with an inner circumference face of the rotor housing so as to generate a torque by the rotatory magnetic field of the coil, and a plurality of upper blades installed at an upper end of the rotor housing so as to leave a predetermined interval therebetween wherein an external air is forcibly sucked in to cool the coil when the rotor housing revolves. The present invention secures sufficiently the space for coil winding to provide automation of winding the coil on the stator core, thereby enabling mass production to reduce product cost.
Description
The application is to be on August 15th, 2002 applying date, and application number is 02129846.7, and denomination of invention is divided an application for the Chinese invention patent application of " external rotor type induction motor ".Above-mentioned original application requires the korean application P2002-7503 of application on February 8th, 2002 and the right of P2002-7510, and these korean application relate to as a reference at this.
Technical field
The present invention relates to a kind of induction motor, particularly relate to a kind of external rotor type induction motor of rotor outside stator that have.
Background technology
Usually, motor is with the electric energy conversioning mechanical energy, so that rotatory power to be provided.Motor mainly is divided into alternating current motor and DC motor, and wherein induction motor is a kind of alternating current motor.
According to the relative position of rotor and stator, induction motor can also be divided into inner-rotor-type induction motor and external rotor type induction motor.The inner-rotor-type induction motor is generally used for washing machine or analog, and it is included in the rotor in the stator.
When the rotor of inner-rotor-type induction motor rotated in stator, the radius of rotor was restricted, so that produce less torque per unit volume, and reduced the utilization of inner space.Recently, proposed a kind of induction motor, it can be installed in the torque that the outer mode of stator increases every equal volume with rotor, and the inner space of stator is used as other purposes.This induction motor is called as external rotor type induction motor.
The general structure of following brief description external rotor type induction motor.
Fig. 1 represents the schematic cross-sectional view of common external rotor type induction motor.
Referring to Fig. 1, external rotor type induction motor comprises that 10, one driving shafts 60 of a rotor case combine with this rotor case so that pass the center of rotor case 10; A rotor conductor 20, this rotor conductor are installed on the inner peripheral surface of rotor case 10, to constitute a connecting circuit; A stator core 30, this stator core are fixed on the framework 50, so that keep a predetermined slit with rotor conductor 20 in the rotor case 10; With a coil 40, this coil 40 is installed on the stator core 30, so that form a rotating magnetic field by connecting AC power.
In this case, driving shaft 60 combines with rotor case 10 by a patchhole 11 of rotor case 10, then, passes the center of stator core 30, so that by framework 50 supporting rotations.
Schematically illustrate the operation of above-mentioned induction motor below.Therefore the Interaction Law of Electric Current of induction on rotating magnetic field that coil 40 produces and the rotor conductor 20, according to the Fu Laiming Left Hand Rule, produces the torque of rotor conductor 20.
Thereby although above-mentioned advantage is arranged, external rotor type induction motor has following shortcoming or problem, therefore, extensively is not used.
At first, in comprising the induction motor of external rotor type induction motor because the copper loss that the resistance of coil 40 produces and since the core loss that the leakage flux of stator core 30 produces be inevitable.Copper loss and core loss produce a large amount of heat.In this case, the temperature in the induction motor increases, thereby the resistance of coil 40 increases, and therefore, power loss increases.Particularly, if the temperature in the induction motor is higher than the temperature of the insulation level of coil 40, the insulation film breakage that on the surface of coil 40, forms, this reduces the durability of induction motor greatly.
In external rotor type induction motor, it is very serious that this problem becomes.When the unit volume load torque of external rotor type induction motor was much higher than the load torque of inner-rotor-type induction motor, this load torque directly caused the temperature of coil 40 to raise.
The second, external rotor type induction motor is difficult to automatic winding around 40 on stator core 30, therefore, can't realize automatic large-scale production, and this causes product cost to increase.
Usually, different winding methods is arranged on stator core.For example, insert coil automatically in the stator slit, this coil utilizes coil winding machine to twine in advance, thereby implements so-called insertion.In addition, implement so-called direct winding method by direct winding around on the stator slit.Insertion is used for the inner-rotor-type induction motor.Although its product cost is higher than direct winding method, insertion can automation, for use in large-scale production.
Yet,, need comprise the new equipment of coil winding machine etc. in order on external rotor type induction motor, to adopt insertion.Therefore, directly winding method is mainly used in external rotor type induction motor.This is because the position in the stator slit of external rotor type induction motor is different fully with the position and the shape in the stator slit of inner-rotor-type induction motor with shape.
Even directly winding method is applied to external rotor type induction motor, automation also is impossible.
Particularly, as shown in Figure 2, external rotor type induction motor needs a plurality of magnetic poles, so that obtain rotatory power.The quantity of magnetic pole depends on the arrangement form of coil.Usually, widely used coil arrangement form utilizes 48 stator slits 31 to form 8 magnetic poles.
Therefore, each magnetic pole distributes six stator slits 31, and coil suitably is wrapped on six stator slits.In this case, coil is divided into as the main winding MC of work winding with as the auxiliary winding SC that starts winding.For ease of explaining, give main winding MC, auxiliary winding SC and stator slit 31 mark random digits as Fig. 2.At first, the stator slit 31a of the outermost of the first main winding MC1 in the stator slit and 31f twine, and the second main winding MC2 twines around other stator slit 31b and 31e then.And the first and second auxiliary winding SC1 and SC2 be interior stator slit 31c in the stator slit and 31d winding respectively.In this case, the third and fourth auxiliary winding SC3 and SC4 twine around stator slit 31b and 31e respectively together, and simultaneously, the second main winding MC2 twines around this third and fourth auxiliary winding SC3 and SC4.
In this case, the cross-sectional area in stator slit 31 (area in the space that coil twines) equates mutually, is difficult to automatic winding around.Be tied with one at random between the stator slit of coil the time when the stator slit that is tied with another coil is present in, the space that wherein is tied with coil is overlapped, thereby causes striving between the coil to be disturbed.For example, four stator slit 31b, 31c, 31d and 31e form between the stator slit 31a of outermost and 31f, and the first main winding MC1 twines around this stator slit 31a and 31f.In this case, the first main winding MC1 and the second main winding MC2 strive and disturb, and first to fourth auxiliary winding SC1 to SC4 is wrapped in remaining stator slit 31b in identical space, and 31c is on 31d and the 31e.
Unfortunately, therefore winding around, has increased product cost so that large-scale production automatically is impossible basically automatically.In addition, by guaranteeing the cross-sectional area in stator slit 31 fully, it can prevent that coil from striving mutually and disturb that therefore, the size in stator slit must increase in twining the space.
Summary of the invention
Therefore, the present invention relates to a kind of external rotor type induction motor, it has been avoided basically because the restriction of prior art and one or more problems that shortcoming is brought.
An object of the present invention is to provide and a kind ofly can improve reliability of products and durability and reduce the external rotor type induction motor of its power consumption by cooling coil stably.
Thereby another object of the present invention provides a kind of by at utmost reducing space overlapped in the coil winding space external rotor type induction motor of large-scale production automatically.
Additional advantage of the present invention, purpose and characteristics part will illustrate in the following description that to those skilled in the art, partial content obviously as can be known, perhaps can be known from the practice of the present invention from the checking process of following specification.Purpose of the present invention and other advantage will realize and acquisition according to structure that particularly points out in the specification and the claimed claim of appended claims.
For realizing these and other advantage, according to embodying here and the purpose of the present invention of generalized description, a kind of external rotor type induction motor comprises a driving shaft; A stator core, this stator core are fixed on the framework, and have a plurality of stators slit, and driving shaft passes the center of stator core like this; Coil, this coil is wrapped on the stator slit, so that form the magnetic field of a rotation; A rotor case, this rotor case is installed in outside the stator core, so that keep a predetermined slit with stator core, wherein driving shaft passes bottom centre's combination of rotor case; Rotor conductor, it is connected with the inner peripheral surface of rotor case, so that produce a torque by the rotating magnetic field of coil; A plurality of blades, it is installed in the upper end of rotor case, so that stay next predetermined interval between it, when rotor case rotated, extraneous air was forced to suck so that cooling coil.
Therefore, the present invention passes through the blade forced-air circulation, thereby makes the coil cooling, therefore, can solve simultaneously because the reduction of the durability that the increase of coil temperature causes and the increase of power consumption.
In one aspect of the invention, a kind of external rotor type induction motor comprises a driving shaft; A stator core, this stator core are fixed on the framework, and driving shaft passes the center of stator core like this; The a plurality of stators slit that on stator core, forms so that parallel with driving shaft, and driving shaft towards on degree of depth difference; Coil, this coil directly is wrapped on the stator slit as distributed winding, so that form the magnetic field of a rotation, this coil comprises main winding and auxiliary winding; A rotor case, this rotor case is installed in outside the stator core, so that keep a predetermined slit with stator core, wherein driving shaft passes bottom centre's combination of rotor case; Rotor conductor, it is connected with the inner peripheral surface of rotor case, so that produce a torque by the rotating magnetic field of coil.
Therefore, the space that the present invention fully guarantees to have different depth does not have overlapping between the coil in stator slit, therefore can utilize the coil winding machine winding around.
In another aspect of the present invention, external rotor type induction motor comprises a driving shaft; A stator core, this stator core are fixed on the framework, and driving shaft passes the center of stator core like this; The a plurality of stators slit that on stator core, forms so that parallel with driving shaft, and driving shaft towards on degree of depth difference; Coil, this coil directly is wrapped on the stator slit as distributed winding, so that form the magnetic field of a rotation, this coil comprises main winding and auxiliary winding; A rotor case, this rotor case is installed in outside the stator core, so that keep a predetermined slit with stator core, wherein driving shaft passes bottom centre's combination of rotor case; Rotor conductor, it is connected with the inner peripheral surface of rotor case, so that produce a torque by the rotating magnetic field of coil; With a plurality of blades, it is installed in the upper end of rotor case and has predetermined space, and when rotating with convenient rotor case, extraneous air is forced to suck so that cooling coil.
The general remark and the following detailed description that are appreciated that front of the present invention are typical and indicative, in order to protection scope of the present invention is further explained.
Description of drawings
The accompanying drawing of being convenient to further to understand the present invention and constituting the part of specification illustrates embodiments of the invention at this, and is used for explaining principle of the present invention with specification of the present invention.In the accompanying drawing:
Fig. 1 illustrates the cross sectional representation of common external rotor type induction motor;
The plane graph of the coil arrangement of the external rotor type induction motor of Fig. 2 key diagram 1;
Fig. 3 has illustrated the cross sectional representation of expression according to the external rotor type induction motor of the first embodiment of the present invention;
Fig. 4 has illustrated the birds-eye view of rotor case of the induction motor of Fig. 3;
Fig. 5 has illustrated the plane graph of difform blade of the induction motor of Fig. 3;
Fig. 6 has illustrated the viewgraph of cross-section of the external rotor type induction motor among Fig. 3, to explain its working condition;
Fig. 7 has illustrated the cross sectional representation of external rotor type induction motor according to a second embodiment of the present invention;
The plane graph of the stator core of external rotor type induction motor in Fig. 8 A key diagram 7;
Fig. 8 B has illustrated the plane graph of the coil arrangement of the external rotor type induction motor among Fig. 8 A;
The partial plan of a different stator core of external rotor type induction motor in Fig. 9 A key diagram 7;
Fig. 9 B has illustrated the plane graph of the coil arrangement of the external rotor type induction motor among Fig. 9 A; With
Figure 10 has illustrated the viewgraph of cross-section of the washing machine that adopts external rotor type induction motor of the present invention.
Embodiment
With reference now to the example in the accompanying drawing,, describes the preferred embodiments of the present invention in detail.In whole accompanying drawing, identical figure notation is used for representing identical or similar parts.
First embodiment
Fig. 3 has illustrated the example cross-section figure according to the external rotor type induction motor of the first embodiment of the present invention.
With reference to figure 3, comprise a rotor case 110 according to the external rotor type induction motor of the first embodiment of the present invention as magnet, driving shaft 160 combines with shell, so that pass the center of rotor case 110, a rotor conductor 120, the inner peripheral surface that this rotor conductor 120 is contained in rotor case 110 is sentenced and is just constituted connecting circuit, a stator core 130, this stator core 130 be fixed on the framework 150 in case keep with rotor case 110 in the predetermined slit of rotor conductor 120, with a coil 140, this coil 140 is contained in stator core 130 and sentences just by connecting AC power formation rotating magnetic field.
In this case, stator core 130 is fixed on the framework 150 by additional draw bolt 137.Framework 150 is according on rotor case 110, and forms opening 151 in the central part office of framework 150, so that pass driving shaft 160.In this case, Bearing Installation part 153 forms around the opening 151 of framework 150, and bearing 155 is installed in Bearing Installation part 153 places, so that supporting driving shaft 160 rotates.
Simultaneously, for cooling coil 140, as shown in Figure 4, a plurality of blades 113 and 114 are installed in the upper end and the bottom of rotor case 110 respectively.
At first, in order to make the extraneous air forced circulation, a plurality of blades 113 are installed in the upper end of rotor case 110.Blade 113 is separated from each other with predetermined space, and erects at the upper end of rotor case 110.In this case, blade 113 is that center and radial parallel are installed with the driving shaft.
When rotor case 110 rotations, blade 113 is with rotor case 110 rotations, so that extraneous air is drawn in the rotor case 110.The principle of the similar cross flow fan of this principle.
Simultaneously, force suction in order to make extraneous air, preferably install blade 113, so that be the center with the driving shaft with respect to radially tilting at a predetermined angle, this as shown in Figure 5.In this case, solid line is represented the rotation direction of rotor case 110, and dotted line is represented the suction direction of extraneous air.Therefore, because stream condition, the air that can more effectively carry out blade 113 sucks.
Then, in order to make the extraneous air forced circulation, a plurality of lower blades 114 form in the bottom of rotor case 110.In this case, a plurality of first ventilation holes 115 form in the bottom of rotor case 110.
Therefore, when rotor case 110 rotations, lower blade 114 rotates with rotor case 110 so that make extraneous air suck rotor cases through first ventilation hole 115.The principle of the similar sirocco fan of this principle.
Simultaneously, a plurality of second ventilation holes 116 are formed on the top and the bottom of rotor case 110, so as air at cooling coil after second ventilation hole 116 discharge.That is, cooled off coil, discharged by the path that forms by second ventilation hole 116 then through the slit inhaled air between the blade 113 and first ventilation hole 115.Therefore, second ventilation hole 116 can prevent that the air of discharging from disturbing inhaled air.
In order to carry out this operation stably, the support end that second ventilation hole 116 is preferably in motor casing 110 forms for 112 times.
The operation of the above-mentioned external rotor type induction motor that is configured to of explained later.
Fig. 6 has illustrated the cross-sectional view of external rotor type induction motor among Fig. 3, so that explain its operation.
With reference to figure 6, when AC power imposes on coil 140, so that induced current on rotor conductor 120, the electric current of rotor conductor 120 inductions is according to the Fu Laiming Left Hand Rule and rotate the magnetic flux that produces through stator core 130 and produce torque together, so that rotor case 110 rotations.
In this case, lower blade 114 is with rotor case 110 rotations, and extraneous air is forced to suck in the rotor case 110 through first ventilation hole 115 thus.Inhaled air is through the bottom, the particularly bottom of coil 140 of stator core 130, so that discharge through second ventilation hole 116.Therefore in this air circulation process, the bottom exposed of coil 140 can be with the temperature maintenance of whole winding 140 under predetermined number of degrees with respect in the circulating air of enough coolings.
Simultaneously, blade 113 is with rotor case 110 rotations, and extraneous air is forced to suck in the rotor case 110 through the space between the blade 113 thus.Inhaled air is through the top of stator core 130, particularly passes through the space between top, stator core 130 and the rotor conductor 120 of coil 140 and the core of stator core 130 in succession, so that discharge through second ventilation hole 116.In this air circulation process, the upper exposed of coil 140 is in circulating air, so that fully cooling, and therefore can be under predetermined number of degrees with respect with the temperature maintenance of whole winding 140.
Second embodiment
Fig. 7 has illustrated the schematic cross section of external rotor type induction motor according to a second embodiment of the present invention.
With reference to figure 7, external rotor type induction motor according to a second embodiment of the present invention comprises a rotor case 210 as magnet, driving shaft 260 combines with this shell, so that pass the center of rotor case 210, a rotor conductor 220, this rotor conductor 220 is contained in the inner peripheral surface place of rotor case 210, so that formation connecting circuit, a stator core 230, this stator core 230 is fixed on the framework 250, so as to keep with rotor case 210 in predetermined slit and a coil 240 of rotor conductor 220, this coil 240 is contained in stator core 230 places, so that form rotating magnetic field by connecting AC power.
In this case, stator core 230 is fixed on the framework 250 through additional draw bolt 237.Framework 250 is according on rotor case 210, and forms opening 251 in the central part office of framework 250, so that driving shaft 260 passes.In this case, Bearing Installation part 253 forms around the opening 251 of framework 250, and bearing 255 is installed in Bearing Installation part 253 places, so that supporting driving shaft 260 rotates.
Simultaneously, 48 stator slits radially are formed on stator core 230 places with predetermined space mutually, so that form eight magnetic poles, this partly shows as Fig. 8 A and 8B.Therefore, be distributed with six stator slits 233 on each magnetic pole.In this case, give each stator slit 233 label so that explain.
Fig. 8 A has illustrated the plane graph of the stator core of the external rotor type induction motor among Fig. 7, and Fig. 8 B has illustrated the plane graph of the coil arrangement of the external rotor type induction motor among Fig. 8 A.
With reference to figure 8A and 8B, form stator slit 233 so that on the degree of depth of driving shaft, differing from one another according to the position in stator slit 233.This is in order to ensure enough winding spaces, so that the coil that is wrapped on the stator slit 233 is not overlapping.In this case, stator slit 233 has three kinds of degree of depth, and it handles first kind of situation of twining main winding MC respectively, twines second kind of situation of auxiliary winding SC, and main winding and auxiliary winding MC and common the third situation of twining of SC.In this case, main winding MC is the work winding, and auxiliary winding SC starts winding.
Specifically, outermost stator slit 233a and 233f in six continuous stator slits are the darkest, and contiguous stator slit 233b and 233e are darker, and inner most stator slit 233c and 233d are the most shallow.In this case, the first main winding MC1 twines through the darkest stator slit 233a and 233f, the first and second auxiliary winding SC1 and SC2 twine through shallow stator slit 233c and 233d, and the second main winding MC2 and the third and fourth auxiliary winding SC3 and SC4 twine jointly through darker stator slit 233b and 233e.In this case, the first main winding MC1 is positioned at the most inboard of stator core 230, and the first and second auxiliary winding SC1 and SC2 are positioned at the outermost of stator core 230, and the second main winding MC2 and the third and fourth auxiliary winding SC3 and SC4 are therebetween, and this is shown in Fig. 8 B.Therefore, the winding space between the coil is not overlapped, so that make the automatic winding around of coil winding machine.
In this case, should determine depth difference between the stator slit 233 by estimated rate, the winding space of main winding and auxiliary winding MC and SC is not overlapped in a scope like this, and this scope does not increase the size of stator core 230.If the width in stator slit 233 is equal to each other, usable area is than the depth ratio in expression stator slit 233.Therefore, the present invention adopts cross-sectional area A 1 and the A6 of outermost stator slit 233a and 233f, and they are the darkest, as the reference cross-sectional area.And, the present invention proposes stator slit 233b and 233e, main winding and auxiliary winding twine on it jointly, cross-sectional area A 2 and A5 be 60-80% with reference to cross-sectional area, and only auxiliary winding twines stator slit 233c on it and cross-sectional area A 3 and the A4 of 233d is the 50-70% with reference to cross-sectional area.
Simultaneously, only main winding twine the degree of depth of stator slit 233a on it and 233f and only auxiliary winding twine other stator slit 233c on it and the degree of depth of 233d also can be changed mutually.
Fig. 9 A illustrated the external rotor type induction motor among Fig. 7 different stator cores plane graph, Fig. 9 B has illustrated the plane graph of the coil arrangement of the external rotor type induction motor among Fig. 9 A.
With reference to figure 9A and 9B, penetralia stator slit 233c and 233d, there are the first and second auxiliary winding SC1 and SC2 to be wrapped between the stator slit on it, it is the darkest to form ground, and other stator slit 233b and 233e have the second main winding MC2 and the third and fourth auxiliary winding SC3 and SC4 to twine on it, it is darker to form ground, and outermost stator slit 233a and 233f only are wound with the first main winding MC1 on it, and it is the most shallow to form ground.In this case, the first main winding MC1 is positioned at the outermost of stator core 230, and the first and second auxiliary winding SC1 and SC2 are positioned at the most inboard of stator core 230, and the second main winding MC2 and the third and fourth auxiliary winding SC3 and SC4 are therebetween.Therefore, the winding space phase non-overlapping copies between the coil, thus make also winding around automatically of coil winding machine.
In this case, the present invention adopts cross-sectional area A 3 and the A4 cross-sectional area as a reference of inner most stator slit 233c and 233d, only is wound with auxiliary winding SC1 and SC2 on it.So, the cross-sectional area A 2 of stator slit 233b and 233e and A5 be the 60-80% of area of reference preferably, main winding and auxiliary winding MC2, SC3 and SC4 are wound on this stator slit 233b and the 233e jointly, and, only twine the stator slit 233a of main winding MC1 and cross-sectional area A 1 and the A6 of 233f on it and be 50-70% with reference to cross-sectional area.
First and second embodiment of the present invention are characterised in that the use external rotor type induction motor.In this case, the present invention guarantees the cooling of coil, therefore can reduce power consumption, also can improve reliability of products.In addition, the present invention guarantees space for coil winding, can carry out large-scale production automatically.
Simultaneously, external rotor type induction motor according to the present invention can be used as the motor of washing machine, is used for driving washing shaft, will explain with the figure signal below.
Figure 10 has illustrated the cross-sectional view of washing machine, and this washing machine has used according to external rotor type induction motor of the present invention.
With reference to Figure 10, to be direct manifold type washing machine with the actuating force of motor directly send washing shaft to washing machine according to the present invention and without belt or pulley.At the water tank 303 of main body 301 internal reservoir laundries water by suspended substance 302 resiliency supported.The laundry container 304 that receives clothing in water tank 303 is mounted for rotation.And blender 305 combines with laundry container 304, so that produce the current from laundry container 304 bottom centre.In this case, washing shaft 360 directly combines with blender 305, so that when washing shaft 360 was rotated, laundry container 304 and blender 305 were integral rotation.
Make the motor of washing shaft 360 rotation be contained in bearing pedestal 350 below, and this motor comprises a rotor case 310, this shell 310 be installed under the bearing pedestal 350 and washing shaft 360 is installed so that pass the bottom centre of rotor case 310, a rotor conductor 320, the inner circumferential surface that this rotor conductor 320 is installed in rotor case 310 is sentenced and is just constituted connecting circuit, a stator core 330, this stator core 330 combines with the bottom of bearing pedestal 350, and be contained in rotor case 310 inside, so that keep predetermined slit with rotor conductor 320, with a coil 340, this coil 340 is contained in stator core 330 and sentences just by connecting AC power, to form rotating magnetic field.
A plurality of electric steel plates pile up and constitute stator core 330, and the core of these electric steel plates is hollow so that pass washing shaft 360.And, with additional support component 370 fixed stator cores 330.In this case, support component 370 combines through the bottom of connecting bolt 337 with bearing pedestal 350, and stator core 330 can be fixed on the bearing pedestal 350 like this.In this case, the excircle that a plurality of stators slit is formed on stator core 330 is sentenced and just is parallel to direction of principal axis, and through stator slit winding around 340.
The opening that coil 340 does not twine in advance through the stator slit inserts, but directly is wrapped on the stator slit 233 by coil winding machine, so that have the profile of distributed winding.
Simultaneously, form the stator slit at stator core 330 places, as mentioned above, form different depth towards washing shaft 360.This is in order to ensure enough winding spaces, and the coil 340 on the stator slit is failed overlapped like this.In this case, the stator slit has three kinds of degree of depth so that tackle first kind of situation of twining main winding respectively, second kind of situation of twining auxiliary winding, and main winding and common the third situation of twining of auxiliary winding.
Shown the characteristic in stator slit in Fig. 8 A and Fig. 9 B well, its explanation is omitted.
Simultaneously, according to external rotor type induction motor of the present invention and clutch mutual operation, and can be used for having the laundry that is separated from each other and the washing machine of dehydrating shaft.In this case, clutch can be installed in the stator core, so that regulate the power that is delivered on laundry and the dehydrating shaft.
Therefore, external rotor type induction motor according to the present invention has following effect or advantage.
At first, the rotor case that combines with driving shaft is installed in outside the stator core, and this has produced the torque per unit volume bigger than former inner-rotor-type induction motor.
The second, the rotor case that combines with driving shaft is installed in outside the stator core, has guaranteed the inner space of stator core, thereby can increase space availability ratio.
The 3rd, extraneous air is by last/lower blade and the ventilation hole forced circulation that forms at rotor case, so that cooling coil more effectively, thereby can reduce power consumption, and prolong durability.
The 4th, the present invention guarantees the space that coil twines effectively, being provided on the stator core winding around automatically, thus can large-scale production, to reduce product cost.
Obviously, to those skilled in the art, the present invention can do different modifications and variations.Like this, as long as modifications and variations of the present invention drop in the protection range and equivalent scope thereof of appended claims, expectation the present invention can cover the scope of its modifications and variations.
Claims (6)
1. external rotor type induction motor, it comprises:
A driving shaft;
A stator core, this stator core are fixed on the framework, and have a plurality of stators slit, and driving shaft passes the center of stator core like this;
Coil, this coil is wrapped on the stator slit, so that form the magnetic field of a rotation;
A rotor case, this rotor case is installed in outside the stator core, so that keep a predetermined slit with stator core, wherein driving shaft passes bottom centre's combination of rotor case;
Rotor conductor, it is connected with the inner peripheral surface of rotor case, so that produce a torque by the rotating magnetic field of coil; With
A plurality of blades, this blade is installed in the upper end of rotor case, so that stay next predetermined interval between blade, when rotor case rotates, forces to suck extraneous air so that cooling coil.
2. external rotor type induction motor as claimed in claim 1 is characterized in that blade is that the center is parallel to radially installation with the driving shaft.
3. external rotor type induction motor as claimed in claim 1 is characterized in that it is the center with respect to radially with a predetermined angle incline that blade is mounted to the driving shaft.
4. external rotor type induction motor as claimed in claim 1, it is characterized in that being formed with a plurality of first ventilation holes, and a lower blade is installed, like this in a side of each first ventilation hole in the bottom of rotor case, when rotor case rotated, extraneous air was forced to suck by first ventilation hole.
5. external rotor type induction motor as claimed in claim 4 is characterized in that first ventilation hole and lower blade are that the center radially forms with the driving shaft.
6. external rotor type induction motor as claimed in claim 1 is characterized in that forming a plurality of second ventilation holes between the upper end of rotor case and bottom.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0007510A KR100442285B1 (en) | 2002-02-08 | 2002-02-08 | outer rotor type induction motor and motor for washing machine |
| KR10-2002-0007503A KR100459144B1 (en) | 2002-02-08 | 2002-02-08 | outer rotor type induction motor |
| KR7503/2002 | 2002-02-08 | ||
| KR7510/2002 | 2002-02-08 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02129846.7A Division CN1252900C (en) | 2002-02-08 | 2002-08-15 | External rotor type induction motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1722574A true CN1722574A (en) | 2006-01-18 |
| CN1722574B CN1722574B (en) | 2010-06-16 |
Family
ID=32221148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100859694A Expired - Lifetime CN1722574B (en) | 2002-02-08 | 2002-08-15 | External rotor type induction motor |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100459144B1 (en) |
| CN (1) | CN1722574B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426288A (en) * | 2013-09-03 | 2015-03-18 | Lg伊诺特有限公司 | Motor |
| CN105048745A (en) * | 2015-08-25 | 2015-11-11 | 马小安 | Asynchronous motor |
| CN110365128A (en) * | 2018-04-10 | 2019-10-22 | 叶贞枝 | Multi-functional low power consuming motor |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100486591B1 (en) * | 2002-11-12 | 2005-05-03 | 엘지전자 주식회사 | Rotor assembly for outer rotor type induction motor and manufacturing method thereof |
| KR100588933B1 (en) * | 2004-04-21 | 2006-06-12 | 주식회사 대우일렉트로닉스 | A cooler of the bracket with in the rotor for outer rotor type motor |
| KR101054421B1 (en) * | 2004-06-24 | 2011-08-04 | 엘지전자 주식회사 | Motor of washing machine |
| KR101054420B1 (en) * | 2004-06-24 | 2011-08-05 | 엘지전자 주식회사 | Motor of washing machine |
| KR101411154B1 (en) * | 2008-02-12 | 2014-06-24 | 엘지전자 주식회사 | Motor and washing machine comprising the same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0433536A (en) * | 1990-05-29 | 1992-02-04 | Fuji Electric Co Ltd | Outer rotor type motor for driving blower |
| JPH05344680A (en) * | 1992-06-05 | 1993-12-24 | Toshiba Toransupooto Eng Kk | Outer rotor motor for vehicle |
| JPH06335201A (en) * | 1993-05-20 | 1994-12-02 | Fujitsu General Ltd | Rotor structure for outer-rotor motor |
| CN1244310A (en) * | 1996-03-29 | 2000-02-09 | 纽瓦茨国际有限公司 | A. C. Machines |
| KR19990002472U (en) * | 1997-06-27 | 1999-01-25 | 배순훈 | Electric motor for washing machine |
| KR100314009B1 (en) * | 1999-01-08 | 2001-11-17 | 구자홍 | Rotor for outer rotor type brushless motor |
| JP2001061256A (en) * | 1999-08-20 | 2001-03-06 | Toshiba Corp | Fully enclosed outer-rotor rotating electric machine |
-
2002
- 2002-02-08 KR KR10-2002-0007503A patent/KR100459144B1/en active IP Right Grant
- 2002-08-15 CN CN2005100859694A patent/CN1722574B/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426288A (en) * | 2013-09-03 | 2015-03-18 | Lg伊诺特有限公司 | Motor |
| CN104426288B (en) * | 2013-09-03 | 2018-02-13 | Lg伊诺特有限公司 | Motor |
| CN105048745A (en) * | 2015-08-25 | 2015-11-11 | 马小安 | Asynchronous motor |
| CN110365128A (en) * | 2018-04-10 | 2019-10-22 | 叶贞枝 | Multi-functional low power consuming motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1722574B (en) | 2010-06-16 |
| KR100459144B1 (en) | 2004-12-03 |
| KR20030067361A (en) | 2003-08-14 |
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Granted publication date: 20100616 |