CN2753049Y - Permanent magnet brushlesls DC electric machine - Google Patents
Permanent magnet brushlesls DC electric machine Download PDFInfo
- Publication number
- CN2753049Y CN2753049Y CN 200420114504 CN200420114504U CN2753049Y CN 2753049 Y CN2753049 Y CN 2753049Y CN 200420114504 CN200420114504 CN 200420114504 CN 200420114504 U CN200420114504 U CN 200420114504U CN 2753049 Y CN2753049 Y CN 2753049Y
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- CN
- China
- Prior art keywords
- armature
- permanent magnet
- rotor
- armature winding
- stator
- 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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Abstract
The utility model relates to a permanent magnet brushless DC motor which is used for generating two magnetic poles of each permanent magnet (1) of an air gap field, and the two magnetic poles both face an armature winding and a straight shaft of the magnetic pole and are parallel to a rotating shaft of a rotor. A brushless commutator of the utility model is composed of a magnetic suction device (2) which is used for providing commutation signals and a mechanical switch (3), wherein the mechanical switch (3) is used for processing the commutation signals and can commutate currents on each armature winding. The utility model has the advantages of low cost, stable operation, long service life and high efficiency.
Description
(1) technical field
The utility model relates to permanent-magnet brushless DC electric machine.
(2) background technology
Known, rely in the motor and carry out the air-gap field of energy converting between mechanical, can produce by current excitation, also can produce by permanent magnet; The electric current that is produced on air-gap field and the armature winding by the permanent magnet on rotor or the stator is a permanent-magnet brushless DC electric machine by the direct current machine that brushless commutator commutates.Have the brush direct current machine to compare with electric excitation, permanent-magnet brushless DC electric machine has simple in structure, and is reliable; Volume is little, light weight; Loss is little, remarkable advantages such as efficient height.
In the prior art, be used to produce each permanent magnet of air-gap field on permanent-magnet brushless DC electric machine rotor or the stator, have only a magnetic pole strength armature winding; The electronic commutator that its brushless commutator all is made up of electronic switch circuit and position transducer, described electronic switch circuit is made up of logical power switch element and position processing signal element, and described position transducer is made up of unit on unit on the sensor stator and the rotor sensor.For example: Chinese patent specification application number 90211042 described brushless, permanently excited direct current motors are exactly this structure.The permanent-magnet brushless DC electric machine of this structure exists that manufacturing cost is higher, work is stable inadequately, useful life is short and the high not enough shortcoming of efficient.
(3) utility model content
At the above-mentioned shortcoming that overcomes prior art, the purpose of this utility model is: provide that a kind of manufacturing cost is lower, the work long and higher permanent-magnet brushless DC electric machine of efficient in more stable, useful life.
The technical solution of the utility model is as follows:
A kind of permanent-magnet brushless DC electric machine is characterized in that:
Two magnetic poles of each permanent magnet (1) that are used to produce air-gap field on rotor or the stator are all in the face of armature winding, and are parallel with rotor shaft with the magnetic pole d-axis.Its brushless commutator is by laying respectively at the magnetic device (2) that is used to provide commutation signal on rotor and the stator, with and be positioned at and be used to handle commutation signal on stator that armature winding is housed or the rotor, constitute for the mechanical switch (3) of the commutation of the electric current on each armature winding; Described magnetic device (2) then constitutes by being positioned on the rotor or stator that permanent magnet (1) is housed, being used for sending according to each permanent magnet (1) magnetic pole and each armature winding relative position the permanent magnet (2a) of commutation signal, be positioned at the armature (2b), limiting position of armature cover (2c) and the armature return spring (2d) that are used to receive commutation signal on stator that armature winding is housed or the rotor.Above-mentioned armature (2b) is under the control of permanent magnet (2a) magnetic attraction and armature return spring (2d) elastic force, can displacement between limiting position of armature cover (2c) and mechanical switch (3), make mechanical switch (3) be in different operating modes, thereby follow rotor motion, armature (2b) in the face of and depart from permanent magnet (2a) magnetic pole, mechanical switch (3) is controlled be that electric current on each armature winding commutates.
Compared with prior art, the utility model since two magnetic poles of each permanent magnet (1) all in the face of armature winding, the magnetic strength multiplication of air-gap field is provided, under used permanent magnet homogeneity amount together and the condition of rotor with rotating speed, more power saving for motor is in electronic operating mode, energy output is bigger for motor is in generating operation mode, thereby efficient is higher; Magnetic device (2) that its brushless commutator employing is durable, inexpensive and mechanical switch (3) replace the electronic commutator of rapid wear, high price, thereby manufacturing cost is lower, work is more stable and useful life is longer.
Below in conjunction with drawings and Examples the utility model is further described.
(4) description of drawings
Accompanying drawing 1 is a kind of permanent magnet brushless DC motor structure schematic diagram;
Accompanying drawing 2 is another permanent magnet brushless DC motor structure schematic diagram;
Accompanying drawing 3 is magnetic device (a 2) structure enlarged drawing in accompanying drawing 1 and the accompanying drawing 2 described permanent-magnet brushless DC electric machines.
(5) embodiment
In an embodiment of the present utility model, a kind of structure of electric vehicle hub permanent-magnet brushless DC electric machine as shown in Figure 1: it comprises the stator (A) that the permanent magnet (1) that is used to produce air-gap field is housed, rotor (B) and the brushless commutator that armature winding (B1) is housed.Two magnetic poles of above-mentioned each permanent magnet (1) are all gone up armature winding (B1) in the face of rotor (B), and are parallel with the rotating shaft of magnetic pole d-axis (D-D ') and rotor (B) (O-O ').Above-mentioned brushless commutator is by laying respectively at the magnetic device (2) that is used to provide commutation signal on stator (A) and the rotor (B), with and be positioned at and be used to handle commutation signal on the rotor (B), constitute for the mechanical switch (3) of each armature winding (B1) electric current commutation.Described magnetic device (2) structure is seen accompanying drawing 1 and accompanying drawing 3: it comprises being positioned at and is used for according to each permanent magnet (1) magnetic pole and each armature winding (B1) relative position on the stator (A), sends the permanent magnet (2a) of commutation signal, is positioned at the armature (2b), limiting position of armature cover (2c) and the armature return spring (2d) that are used to receive commutation signal on the rotor (B); Armature (2b) is under the control of permanent magnet (2a) magnetic attraction and armature return spring (2d) elastic force, can be between limiting position of armature cover (2c) and mechanical switch (3) along (C-C ') axial displacement, make mechanical switch (3) be in different operating modes, thereby follow rotor (B) motion, armature (2b) in the face of and depart from permanent magnet (2a) magnetic pole, mechanical switch (3) is controlled be that electric current on each armature winding (B1) commutates.
In another embodiment of the present utility model, a kind of structure of birotor permanent magnetic brshless DC motor as shown in Figure 2: it comprises the rotor (B) that the permanent magnet (1) that is used to produce air-gap field is housed, stator (A) and the brushless commutator that armature winding (B1) is housed.Two magnetic poles of above-mentioned each permanent magnet (1) are all in the face of the armature winding (B1) on the stator (A), and are parallel with the rotating shaft of magnetic pole d-axis (D-D ') and rotor (B) (O-O ').Above-mentioned brushless commutator is by laying respectively at the magnetic device (2) that is used to provide commutation signal on rotor (B) and the stator (A), with and be positioned at and be used to handle commutation signal on the stator (A), constitute for the mechanical switch (3) of each armature winding (B1) electric current commutation.Described magnetic device (2) structure is seen accompanying drawing 2 and accompanying drawing 3: it comprises being positioned at and is used for according to permanent magnet (1) magnetic pole and each armature winding (B1) relative position in rotor (B) rotating shaft, sends the permanent magnet (2a) of commutation signal, is positioned at the armature (2b), limiting position of armature cover (2c) and the armature return spring (2d) that are used to receive commutation signal on the stator (A); Armature (2b) is under the control of permanent magnet (2a) magnetic attraction and armature return spring (2d) elastic force, can be between limiting position of armature cover (2c) and mechanical switch (3) along (C-C ') axial displacement, make mechanical switch (3) be in different operating modes, thereby follow rotor (B) motion, armature (2b) in the face of and depart from permanent magnet (2a) magnetic pole, mechanical switch (3) is controlled be that electric current on each armature winding (B1) commutates.
The utility model is not limited to the foregoing description, as long as relate to the described feature of claim, all belongs to scope of the present utility model.
Claims (2)
1, a kind of permanent-magnet brushless DC electric machine is characterized in that:
Two magnetic poles of each permanent magnet (1) that are used to produce air-gap field on rotor or the stator are all in the face of armature winding, and are parallel with rotor shaft with the magnetic pole d-axis; Its brushless commutator is by laying respectively at the magnetic device (2) that is used to provide commutation signal on rotor and the stator, with and be positioned at and be used to handle commutation signal on stator that armature winding is housed or the rotor, constitute for the mechanical switch (3) of the commutation of the electric current on each armature winding.
2, permanent-magnet brushless DC electric machine according to claim 1 is characterized in that:
Above-mentioned magnetic device (2) constitutes by being positioned on the rotor or stator that permanent magnet (1) is housed, being used for sending according to each permanent magnet (1) magnetic pole and each armature winding relative position the permanent magnet (2a) of commutation signal, be positioned at the armature (2b), limiting position of armature cover (2c) and the armature return spring (2d) that are used to receive commutation signal on stator that armature winding is housed or the rotor.Above-mentioned armature (2b) is under the control of permanent magnet (2a) magnetic attraction and armature return spring (2d) elastic force, can displacement between limiting position of armature cover (2c) and mechanical switch (3), make mechanical switch (3) be in different operating modes, thereby follow rotor motion, armature (2b) in the face of and depart from permanent magnet (2a) magnetic pole, mechanical switch (3) is controlled be that electric current on each armature winding commutates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114504 CN2753049Y (en) | 2004-12-21 | 2004-12-21 | Permanent magnet brushlesls DC electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114504 CN2753049Y (en) | 2004-12-21 | 2004-12-21 | Permanent magnet brushlesls DC electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2753049Y true CN2753049Y (en) | 2006-01-18 |
Family
ID=35914459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420114504 Expired - Fee Related CN2753049Y (en) | 2004-12-21 | 2004-12-21 | Permanent magnet brushlesls DC electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2753049Y (en) |
-
2004
- 2004-12-21 CN CN 200420114504 patent/CN2753049Y/en not_active Expired - Fee Related
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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 |