CN201167268Y - Permanent-magnet DC motor - Google Patents
Permanent-magnet DC motor Download PDFInfo
- Publication number
- CN201167268Y CN201167268Y CNU2008200820335U CN200820082033U CN201167268Y CN 201167268 Y CN201167268 Y CN 201167268Y CN U2008200820335 U CNU2008200820335 U CN U2008200820335U CN 200820082033 U CN200820082033 U CN 200820082033U CN 201167268 Y CN201167268 Y CN 201167268Y
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- CN
- China
- Prior art keywords
- motor
- rotor
- magnetic
- magnet
- permanent magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 238000004804 winding Methods 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims abstract description 4
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 8
- 241000883990 Flabellum Species 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 230000005347 demagnetization Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model relates to a permanent magnet direct current motor, which comprises a stator and a rotor arranged in the motor casing, a winding coil arranged on the stator iron core, a magnetic core formed by laminating disk-shaped steel sheets and arranged on the rotor rotating shaft, a rotor magnetic shoe fixed on the periphery of the magnetic core, and a position sensor element arranged on the motor and provided with sensor magnetic steel and a Hall element. The sensor magnetic steel is arranged in a magnetic steel seat, the magnetic steel seat is fixed on the motor rotating shaft extending out of the end cover, and the sensor magnetic steel and the Hall element are arranged in the cavity formed by the end cover and a dust cap. Because magnetic steel seat is fixed on the motor rotating shaft extending out of the end cover, the external interference is low, and thereby the electronic reversing signal of the motor can not be interfered by the machining precision of the rotor and the armature current. The position sensor element is only influenced by the external environmental temperature; therefore, the operation of the motor can be more stable.
Description
Technical field:
The utility model relates to a kind of permanent magnet DC motor.
Background technology:
At present, various permanent magnet brushless DC motor structures are numerous.As Chinese patent a kind of " internal rotor permanent-magnetic brshless DC motor " proposed for No. 03249962.0.This internal rotor permanent-magnetic brshless DC motor comprises: motor stator, rotor, end cap and position sensing element, above-mentioned stator comprises stator core, end ring, rivet and winding, wherein stator core connects by rivet with end ring, and the stator core cylindrical is the shell of motor; Rotor is formed internal rotor by motor shaft and rotor magnetic shoe, and its rotor magnetic shoe is fixed on the motor shaft cylindrical, and rotor magnetic shoe cylindrical twines no latitude band.But have the following disadvantages:
1, because position sensing element is located in the casing, the motor electronic commutation signal is subject to the interference and the interior Temperature Influence of casing of rotor machining accuracy, armature supply, makes that machine operation stability is undesirable.
2, the transducer magnet steel in the position sensing element adopts overall structure, and each line of demarcation, magnetic field is unintelligible, causes the motor commutation inaccuracy easily, influences the machine operation performance.
3, because the magnetic pole of motor adopts whole magnetic pole, the eddy current that whole magnetic pole produces in the course of the work is big, makes rotor temperature rise big.When whole magnetic pole volume was big, the mechanical strength of magnetic pole was undesirable.
Summary of the invention:
The purpose of this utility model is: a kind of working stability, permanent magnet DC motor that reliability is high are provided.
The utility model is achieved through the following technical solutions:
A kind of permanent magnet DC motor comprises: be provided with stator and rotor in the electric machine casing, stator core is provided with winding coil, rotor shaft is provided with the magnetic core that discoid steel disc builds up, the magnetic core periphery is fixed with the rotor magnetic shoe, motor is provided with the position sensing element that comprises transducer magnet steel and Hall element, it is characterized in that: described transducer magnet steel is located in the magnet steel seat, magnet steel seat is fixed in and stretches out on the outer machine shaft of end cap, and transducer magnet steel and Hall element are located in the cavity of end cap and dust cap formation.
Advantage of the present utility model is: stretch out on the outer machine shaft of end cap because magnet steel seat is fixed in, it is subjected to external interference little, makes the motor electronic commutation signal not be subjected to the interference of rotor machining accuracy, armature supply.Position sensing element only is subjected to the influence of ambient temperature, makes machine operation more stable, and reliability is higher.
In the utility model, described transducer magnet steel is the magnet ring that is spliced by multi-disc discrete magnetic pole.Adopt the multi-disc discrete magnetic pole transducer magnet steel that is spliced, each line of demarcation, magnetic field, splicing back is clear, even, and the precision height makes that motor commutation work is more reliable.
In the utility model, the magnetic pole of described rotor magnetic shoe is combined into by the magnetic shoe of two same polarities at least, the retainer plate of making by non-magnet material between magnetic pole two ends and adjacent two magnetic shoes, and the length overall of each retainer plate is less than 1/2 of the magnetic pole length overall.Because the magnetic pole of rotor magnetic shoe is combined into by the magnetic shoe of two same polarities at least, compare with adopting whole magnetic pole, can reduce eddy current and stray loss, improved efficiency of motor, solve the rotor magnetic shoe because of the overheated demagnetization problem that causes, and can improve the mechanical strength of magnetic shoe, prolong motor useful life.Retainer plate can prevent to drop because of ageing of binders causes magnetic shoe, makes magnetic shoe reliably fixing.When the length overall of each retainer plate less than 1/2 of magnetic pole length overall, can make the rotor heat radiation better.
In the utility model, be provided with perforate in the described discoid steel disc, the cast aluminium link is fixed together discoid steel disc.Because the heat conductivility of aluminium is good and lighter weight, it can reduce the temperature rise of rotor, and reduces the quality of rotor, improves motor sensitivity.
In the utility model, described cast aluminium link outer end is provided with flabellum and balance columns.Flabellum can make the motor internal more uniform temperature, prevents the generation of local overheating situation, and can reduce the temperature of armature winding.The weight that increases or reduce balance columns can be adjusted the dynamic balancing of rotor, makes the rotor running more steady.
Description of drawings:
Fig. 1 is the utility model permanent magnet DC motor modular construction schematic diagram.
Fig. 2 is the utility model position sensing element place schematic diagram.
Fig. 3 is the utility model transducer magnet steel schematic diagram.
Fig. 4 is the utility model permanent magnet DC motor rotor part decomposing schematic representation.
Embodiment:
In conjunction with Fig. 1, Fig. 2, Fig. 3, shown in Figure 4: the permanent magnet DC motor of present embodiment comprises: be provided with stator 2 and rotor 3 in the electric machine casing 1, stator core is provided with winding coil 4, rotor shaft 5 is provided with the magnetic core that discoid steel disc 6 builds up, the magnetic core periphery is fixed with rotor magnetic shoe 7, and motor is provided with the position sensing element that comprises transducer magnet steel 8 and three Hall elements 9.Transducer magnet steel 8 is located in the magnet steel seat 10, and magnet steel seat 10 is fixed on the machine shaft 5 that stretches out outside the end cap 11, and transducer magnet steel and three Hall elements are located in the cavity of end cap 11 and dust cap 12 formations.
Transducer magnet steel 8 is the magnet rings that are spliced by multi-disc discrete magnetic pole.
The magnetic pole of rotor magnetic shoe is combined into by the magnetic shoe 7 of two same polarities at least, magnetic pole two ends and adjacent 7 retainer plates of making by non-magnet material 13 of two magnetic shoes, and the length overall of each retainer plate is less than 1/2 of the magnetic pole length overall.Be provided with perforate 14 in the discoid steel disc, cast aluminium link 15 is fixed together discoid steel disc.Cast aluminium link outer end is provided with flabellum 16 and balance columns 17.The part that the cast aluminium link stretches in the discoid steel disc among Fig. 4 is not shown.
The Electromagnetic Design aspect of present embodiment motor adopts especially big gap structure design, can effectively reduce and weaken armature supply to the magnet steel Effect on Performance, effectively prevented the loss of excitation or the local demagnetization of permanent magnet under the high peak current, the reliability and the life-span of having improved motor.
Stretch out on the outer machine shaft of end cap because magnet steel seat is fixed in, it is subjected to external interference little, makes the motor electronic commutation signal not be subjected to the interference of rotor machining accuracy, armature supply.Position sensing element only is subjected to the influence of ambient temperature, makes machine operation more stable, and reliability is higher.Adopt the multi-disc discrete magnetic pole transducer magnet steel that is spliced, each line of demarcation, magnetic field, splicing back is clear, even, and the precision height makes that motor commutation work is more reliable.
Because the magnetic pole of rotor magnetic shoe is combined into by the magnetic shoe of two same polarities at least, compare with adopting whole magnetic pole, can reduce eddy current and stray loss, improved efficiency of motor, solve the rotor magnetic shoe because of the overheated demagnetization problem that causes, and can improve the mechanical strength of magnetic shoe, prolong motor useful life.Retainer plate can prevent to drop because of ageing of binders causes magnetic shoe, makes magnetic shoe reliably fixing.When the length overall of each retainer plate less than 1/2 of magnetic pole length overall, can make the rotor heat radiation better.
Claims (5)
1, a kind of permanent magnet DC motor comprises: be provided with stator and rotor in the electric machine casing, stator core is provided with winding coil, rotor shaft is provided with the magnetic core that discoid steel disc builds up, the magnetic core periphery is fixed with the rotor magnetic shoe, motor is provided with the position sensing element that comprises transducer magnet steel and Hall element, it is characterized in that: described transducer magnet steel is located in the magnet steel seat, magnet steel seat is fixed in and stretches out on the outer machine shaft of end cap, and transducer magnet steel and Hall element are located in the cavity of end cap and dust cap formation.
2, permanent magnet DC motor according to claim 1 is characterized in that: described transducer magnet steel is the magnet ring that is spliced by multi-disc discrete magnetic pole.
3, permanent magnet DC motor according to claim 1, it is characterized in that: the magnetic pole of described rotor magnetic shoe is combined into by the magnetic shoe of two same polarities at least, the retainer plate of being made by non-magnet material between magnetic pole two ends and adjacent two magnetic shoes, the length overall of each retainer plate is less than 1/2 of the magnetic pole length overall.
4, permanent magnet DC motor according to claim 1 is characterized in that: be provided with perforate in the described discoid steel disc, the cast aluminium link is fixed together discoid steel disc.
5, permanent magnet DC motor according to claim 4 is characterized in that: described cast aluminium link outer end is provided with flabellum and balance columns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200820335U CN201167268Y (en) | 2008-01-08 | 2008-01-08 | Permanent-magnet DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200820335U CN201167268Y (en) | 2008-01-08 | 2008-01-08 | Permanent-magnet DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201167268Y true CN201167268Y (en) | 2008-12-17 |
Family
ID=40192659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200820335U Expired - Fee Related CN201167268Y (en) | 2008-01-08 | 2008-01-08 | Permanent-magnet DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201167268Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364846A (en) * | 2011-09-20 | 2012-02-29 | 应忠良 | Permanent magnet brushless DC (direct current) motor |
| WO2014023991A1 (en) * | 2012-08-09 | 2014-02-13 | Romero-Beltran Julian | Motor |
| CN105071625A (en) * | 2015-07-31 | 2015-11-18 | 常州市昊升电机有限公司 | Novel high-speed brushless motor |
| CN113258727A (en) * | 2021-06-01 | 2021-08-13 | 广东威灵电机制造有限公司 | Motor and household appliance |
-
2008
- 2008-01-08 CN CNU2008200820335U patent/CN201167268Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364846A (en) * | 2011-09-20 | 2012-02-29 | 应忠良 | Permanent magnet brushless DC (direct current) motor |
| WO2014023991A1 (en) * | 2012-08-09 | 2014-02-13 | Romero-Beltran Julian | Motor |
| US20150372574A1 (en) * | 2012-08-09 | 2015-12-24 | Julian Romero-Beltran | Single-phase shaded pole induction motor, convertible to permanent magnet motor |
| US10164507B2 (en) * | 2012-08-09 | 2018-12-25 | Julián Romero-Beltran | Single-phase shaded pole induction motor, convertible to permanent magnet motor |
| CN105071625A (en) * | 2015-07-31 | 2015-11-18 | 常州市昊升电机有限公司 | Novel high-speed brushless motor |
| CN113258727A (en) * | 2021-06-01 | 2021-08-13 | 广东威灵电机制造有限公司 | Motor and household appliance |
| CN113258727B (en) * | 2021-06-01 | 2022-05-03 | 广东威灵电机制造有限公司 | Motor and household appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhejiang Unite Motor Co.,Ltd. Assignor: Li Jindong Contract fulfillment period: 2009.7.20 to 2017.7.19 Contract record no.: 2009330001782 Denomination of utility model: AC power supply permanent magnetic DC motor Granted publication date: 20081217 License type: Exclusive license Record date: 20090803 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.7.20 TO 2017.7.19; CHANGE OF CONTRACT Name of requester: ZHEJIANG UNITE ELECTRIC MACHINE CO., LTD. Effective date: 20090803 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160617 Address after: 321300, No. 287, Lingshi Road, Chengxi West District, Zhejiang, Yongkang Patentee after: Zhejiang Unite Motor Co.,Ltd. Address before: No. two West West Industrial District of Yongkang City, Zhejiang province 321300 No. 18 Zhejiang unite Electrical Motor Co. Ltd. Patentee before: Li Jindong |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081217 Termination date: 20170108 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |