CN2464008Y - Brushless dc motor derectly driving washing machine - Google Patents
Brushless dc motor derectly driving washing machine Download PDFInfo
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- CN2464008Y CN2464008Y CN 00268292 CN00268292U CN2464008Y CN 2464008 Y CN2464008 Y CN 2464008Y CN 00268292 CN00268292 CN 00268292 CN 00268292 U CN00268292 U CN 00268292U CN 2464008 Y CN2464008 Y CN 2464008Y
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Abstract
The utility model relates to a brushless direct current motor for directly driving washing machines. The utility model is suitable for full automatic pulsator washing machines and rotary-drum washing machines which are directly driven. The pole number P of a rotor of the utility model is 16, the slot number Z of an iron core of a stator is 18. The utility model uses a uniform tooth groove structure, and the width of a groove opening is 3.5 mm. The utility model uses two square-wave Hall position sensors, and an engineering plastic sleeve is additionally arranged between a rotor outer shell and a mechanical driving shaft. The utility model has the advantages of small positioning moment, low noise and stable performance.
Description
The utility model relates to a kind of brushless DC motor of direct driving washing machine, and specifically a kind of external rotor three-phase brushless permanent magnet direct current motor that is exclusively used in washing machine is applicable to the full automatic impeller type washing machine and the drum type washing machine of direct driving.
Conventional washer generally adopts the drive motors of single-phase capacitance operation induction motor as washing machine.The operational efficiency of capacitance operation induction motor is very low, generally has only about 50%, and when making drive motors owing to the usability induction motor again, essential reduction gearing and the belt pulley of using, therefore, operational efficiency is just lower.So the someone uses the drive motors of brushless direct-current permanent magnet motor as washing machine instead.The operational efficiency of brushless direct-current permanent magnet motor is very high, more than 90%, after the electronic circuit speed regulating control, can remove reduction gearing and belt pulley, realizes directly driving, and has reduced noise greatly.And system effectiveness increases.But because the poor structure of the stator that prior art adopted size makes the processing technology of this motor become rather complicated, production cost has increased.Owing to adopt three hall position sensors, increased production cost again again, more be number of magnetic poles P=24 because teeth groove cooperates; Groove is counted Z=36, and the location torque number of times that this gear grooved cooperates is 72 times, and its amplitude can be very big, must adopt big sulculus to be remedied.Many (Z=36) are favourable for reducing location torque for the groove number, and location torque is the most important source of motor electromagnetic noise, and the many more production technologies of groove number are complicated more, and production cost will be high more.The iron loss of number of poles many (P=24) motor increases.
The purpose of this utility model is at the deficiency that prior art exists, and proposes a kind of simple in structurely, and the cost cost is low, the direct driving brushless DC motor that efficient is high.
The purpose of this utility model is achieved in that the utility model mainly is made up of stator, rotor, permanent magnet, transducer and plastic sheath that the punching of silicon steel sheet laminates, the main points that the present utility model is created are, the number of magnetic poles of rotor 1 is P=20, the groove of stator core 2 is counted Z=21, adopt even teeth groove structure, notch 3 width are 3.5 millimeters, and transducer adopts two Hall switch to distribute by 90 ° of electrical degrees in the space.Described Hall element is the Hall switch of switching mode, so, not high to the installation site required precision.Only need the magnetosensitive sense direction of hall position sensor is consistent with the rotor normal direction, be installed on the internal stator support 8, and and rotor magnetic steel in keep the air gap of 1-2mm between the circle, Hall element 10,11 is arranged on the same circumference, space angle is 1/2 pole span, i.e. 90 ° of electrical degrees.Hall element of the present utility model also can be by being installed on the stator support 9, and and the rotor magnetic steel cylindrical between keep the air gap of 1-2mm, Hall element 10,11 is arranged on the same circumference, space angle is 1/2 pole span, i.e. 90 ° of electrical degrees.The utility model concrete structure: rotor 1 is a bowl-type, stator 2 is the open circles annular, stator 2 and rotor 1 are coaxial, stator 2 is installed in 1 bowl of the rotor by axle system, permanent magnet 5 sticks on the inwall of rotor 1, between rotor 1 and the axle system plastic sheath 20 is arranged, and transducer 10 and 11 is installed on the support 8, support 8 is contained in stator 2 upper surfaces, and coil is in the groove of stator 2.The punching 14 of each layer silicon steel sheet is made up of three identical 120 ° of fan types of shape punching 15, there are two through holes 16 in the yoke portion of 120 ° of fan types punching, diameter is 3-5mm, angle is 60 ° between two through hole, be symmetrically distributed in the yoke portion of fan type punching, the punching of three fan types in one plane constitutes a circular ring type stator punching, so, the annulus stator punching has three pieces, in order to reduce the influence of piece, when every circular ring type stator punching is carried out chip, from circular ring type stator punching of lowermost layer to the stator core magnetic circuit, circular ring type stator punching of every increase, 60 ° of all clockwise or counter-clockwise wrong sheets.Because symmetry, happening frequently through above-mentioned wrong sheet still maintains 6 through holes 16 in the stator core that comes, passes 6 through holes in the stator core with upper and lower pressure ring 17,18 of stator core and thin iron staff again, and the stator core riveting is become an integral body.The utility model also can be positioned at two through holes of each fan type punching yoke portion two grooves 19 of yoke portion circle, the about 3-6m of groove width, the about 1-2mm of groove depth instead.60 ° of wrong sheets are carried out in this punching as stated above, utilize 6 grooves after pressure ring 17,18 compresses up and down with stator core again, stator core is welded into a complete stator core.In order further to simplify stator core processing, solve the stock utilization problem, the utility model also can or be positioned at two grooves 19 of yoke portion circle with two through holes 16 of above-mentioned each fan type punching yoke portion, be positioned at the blind hole 21 of two drawings of 120 ° of segmental punching yoke portion circles instead, the about 2-3mm of the diameter of blind hole, the degree of depth of blind hole is 1/2 punching thickness; Angle is 60 ° between two blind holes; Three segmental punchings in one plane constitute a circular ring type stator punching, so, the circular ring type stator punching has three pieces, in order to reduce the influence of piece to the stator core magnetic circuit, when every annular stator punching is carried out chip, from circular ring type stator punching of lowermost layer, whenever add repeatedly a circular ring type stator punching with regard to 60 ° of angles of clockwise or counterclockwise wrong sheet, because the symmetry that blind hole 21 distributes, through happen frequently every segmental punching of the stator core that comes of mistake sheet is self-align, again with in the stator core, following pressure ring 17,18 compress the back becomes a complete stator core by injection moulding with the stator core plastic compression.Increased an engineering plastics cover 20 between the utility model rotor case and the mechanical drive shaft, because engineering plastics are connected between rotor steel body and the mechanical drive shaft, its elastic characteristic has cushioned the transfer strength of harmonic wave moment greatly.Improved the free oscillation attribute of washing machine integral body, thereby the noise level of washing machine integral body is increased again.
The utility model is rational in infrastructure, stable performance, and location torque is little, and noise is low, and production cost descends, and motor is exerted oneself greatly, is with a wide range of applications.
Fig. 1 is the utility model principle assumption diagram.
Fig. 2 is the utility model stator principle assumption diagram.
Fig. 3 is the utility model magnet steel principle assumption diagram.
Fig. 4 is the utility model magnet steel principle assumption diagram.
Fig. 5 is the utility model fan type punching principle assumption diagram.
Fig. 6 is the round punching principle assumption diagram of the utility model.
Fig. 7 is the round punching principle assumption diagram of the utility model.
Fig. 8 is the round punching yoke of a utility model portion location blind hole schematic diagram.
Fig. 9 is the round punching yoke of a utility model portion location blind hole schematic diagram.
Figure 10 is the utility model stator scheme of installation.
Figure 11 is second kind of embodiment principle assumption diagram of the utility model.
Embodiment:
Utilize the utility model technology to realize a kind of external rotor three-phase brushless dc permanent magnet motor that is exclusively used in direct driving washing machine.The number of magnetic poles P of the rotor 1 of this dc permanent magnet motor is 20, and it is 21 that the groove of stator core 2 is counted Z, and the width of notch 3 is 3.5mm, and employed position transducer is the Hall switch of two square wave output forms; Two Hall switch are 90 ° of electrical degrees at space quadrature, and motor has adopted even teeth groove structure, and width of rebate is 3.5mm, and the lead that is fit to very much the different-diameter of all kinds of washing machines is walked and coiling in this sizes of notch.
Claims (6)
1, a kind of brushless DC motor of direct driving washing machine, comprise stator, rotor, permanent magnet, transducer that the punching of silicon steel sheet laminates, it is characterized in that: comprise that also plastic sheath [20], plastic sheath [20] are installed between rotor case and the mechanical drive shaft, rotor [1] number of magnetic poles P is 20, and it is 21 that the groove of stator core [2] is counted Z; Notch [3] width is 3.5mm, employed position transducer is the Hall switch of two square wave output patterns, two Hall switch are 90 ° of electrical degrees at space quadrature, the size of magnet steel pole span [13] is 28-35mm, the magnetosensitive sense direction of hall position sensor is consistent with the rotor normal direction, be installed on the internal stator support [8], and and rotor magnetic steel in keep the air gap of 1-2mm between the circle, two Hall elements [10], [11] are arranged on the same circumference, space angle is 1/2 pole span, i.e. 90 ° of electrical degrees.
2. motor according to claim 1 is characterized in that: the magnetosensitive sense direction of hall position sensor is consistent with the rotor normal direction, be installed on the stator support [9], and and the rotor magnetic steel cylindrical between keep the air gap of 1-2mm.
3. motor according to claim 1 is characterized in that: when permanent magnet was the bonded neodymium-iron-boron magnet steel, the two radius difference was 3-4mm; When permanent magnet is ferrite magnetic steel, the difference of two radius is 6-8mm, top rake is carried out by straight line or camber line in interior round both sides [6], [7] of described watt of type magnet steel, the two sections straight lines that top rake part is corresponding or the length of camber line, be respectively the total arc length of circle in 1/3, two sections straight lines or camber line that top rake part is corresponding intersect with interior circle respectively, and the radial depth of arc length or top rake is interior radius of circle R
1With exradius R
2Difference 1/3.
4. motor according to claim 1, it is characterized in that: the punching of ground floor silicon steel sheet [14] is made up of three identical 120 ° of segmental punchings of shape [15], there are two through holes [16] in the yoke portion of 120 ° of segmental punchings, diameter is 3-5mm, angle is 60 ° between two through hole, be symmetrically distributed in the yoke portion of segmental punching, three segmental punchings in one plane constitute a circular ring type stator punching, when every annulus stator punching is carried out chip, from circular ring type stator punching of lowermost layer, whenever add repeatedly a circular ring type stator punching with regard to 60 ° of angles of clockwise or counterclockwise wrong sheet, because symmetry, in the stator core that the mistake sheet changes, still maintain 6 through holes [16], again with in the stator core, following pressure ring [17], [18] and thin iron staff pass 6 through holes in the stator core, an integral body is made in the stator core riveting.
5. motor according to claim 1, it is characterized in that: the punching of each silicon steel sheet [14] is made up of three identical 120 ° of segmental punchings of shape [15], circle has two grooves [19] in the yoke portion of 120 ° of segmental punchings, the about 3-6mm of groove width, the about 1-2mm of groove depth, angle is 60 ° between two grooves, three segmental punchings in one plane constitute a circular ring type stator punching, when every circular ring type stator punching is carried out chip, from circular ring type stator punching of lowermost layer, whenever add repeatedly a circular ring type stator punching with regard to 60 ° of electrical degrees of clockwise or counterclockwise wrong sheet, because symmetry, the stator core of happening frequently through the mistake sheet still keeps 6 grooves [19], again with pressure ring [17] about the stator core, [18] utilize 6 grooves after compressing, stator core is welded into a complete stator core.
6. motor according to claim 1, it is characterized in that: the punching of each silicon steel sheet [14] is made up of three identical 120 ° of segmental punchings of shape [15], circle has the blind hole [21] of two drawings in the yoke portion of 120 ° of segmental punchings, the about 2-3mm of the diameter of blind hole, the degree of depth of blind hole is about 1/2 of stator punching thickness, angle is 60 ° between two blind holes, three segmental punchings in one plane constitute a circular ring type stator punching, from circular ring type stator punching of lowermost layer, whenever add repeatedly a circular ring type stator punching with regard to 60 ° of electrical degrees of clockwise or counterclockwise wrong sheet, because the symmetry that blind hole [21] distributes, through happen frequently every segmental punching of the stator core that comes of mistake sheet is self-align, again with stator core pressure ring [17] up and down, [18] compress the back and stator core is welded into a complete stator core by injection moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00268292 CN2464008Y (en) | 2000-12-25 | 2000-12-25 | Brushless dc motor derectly driving washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00268292 CN2464008Y (en) | 2000-12-25 | 2000-12-25 | Brushless dc motor derectly driving washing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2464008Y true CN2464008Y (en) | 2001-12-05 |
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ID=33621933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00268292 Expired - Fee Related CN2464008Y (en) | 2000-12-25 | 2000-12-25 | Brushless dc motor derectly driving washing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2464008Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435451C (en) * | 2004-09-30 | 2008-11-19 | 株式会社日立产机系统 | Electric rotating machine having permanent magnets and method of manufacturing teeth portions of the stator iron core |
| CN101018002B (en) * | 2006-12-28 | 2013-03-27 | 李平 | Small three-phase high-performance square wave permanent magnetic DC low-speed brushless motor |
-
2000
- 2000-12-25 CN CN 00268292 patent/CN2464008Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435451C (en) * | 2004-09-30 | 2008-11-19 | 株式会社日立产机系统 | Electric rotating machine having permanent magnets and method of manufacturing teeth portions of the stator iron core |
| US7626301B2 (en) | 2004-09-30 | 2009-12-01 | Japan Servo Co., Ltd. | Electric rotating machine having permanent magnets and method of manufacturing teeth portions of the stator iron core |
| CN101018002B (en) * | 2006-12-28 | 2013-03-27 | 李平 | Small three-phase high-performance square wave permanent magnetic DC low-speed brushless motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |