CN2357434Y - Permanent-magnet DC electric machine - Google Patents
Permanent-magnet DC electric machine Download PDFInfo
- Publication number
- CN2357434Y CN2357434Y CN 98225156 CN98225156U CN2357434Y CN 2357434 Y CN2357434 Y CN 2357434Y CN 98225156 CN98225156 CN 98225156 CN 98225156 U CN98225156 U CN 98225156U CN 2357434 Y CN2357434 Y CN 2357434Y
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- motor
- rotor
- winding
- stator
- teeth groove
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Abstract
The utility model discloses a permanent-magnet DC electric machines, which comprises a stator, and a rotor, wherein, the stator is provided with tooth slots, and windings are inserted into the tooth slots; a permanent magnet pole is arranged on the rotor. The utility model is characterized in that each of the windings is inserted in the adjacent two tooth slots; one effective side of one winding is positioned in each of the tooth slots; the ratio of the number of the tooth slots of the stator and the number of poles of the rotor is 12 k: 10 k or 12 k: 10 k for three-phase electric machines, and 20 k: 22k or 20 k: 18 k for five-phase electric machines, wherein, the k is a positive integer. The utility model has the advantages of easy fabrication, material saving, low manufacture cost, and high efficiency.
Description
The utility model includes the permanent magnet direct current motor of stationary armature and rotary magnet.
According to electric machine theory and design of electrical motor and manufacturing practice, the intrinsic teeth groove location torque of permanent magnet dc motor, it can cause motor to produce vibration, noise and exert oneself not steady, for addressing this problem, the most frequently used method is groove square of deflection at present, as the Forever brand bicycle use 152SWX low speed brush-less permanent magnetic direct current machine.But, winding in the same in the running teeth groove of this skewed slot motor may place the magnetic field of two kinds of opposed polarities simultaneously, produce opposing torque, electric motor starting moment and work moment are reduced, even motor can't be started and run well, therefore can only adopt overlapping winding to place restrictions on this damping torque.But adopt overlapping winding also can bring following problem:
One, can only adopt hand insertion, be not easy to adopt the mechanization operation, technology difficulty is big, the cost height,
Production efficiency is low;
Two, winding overhang is many with line, and the manufacturing cost height also because copper loss is big, has reduced the motor effect simultaneously
Rate;
Three, the motor axial dimension is big, is unfavorable for the miniaturization use.
The purpose of this utility model is that a kind of permanent magnet DC motor that overcomes above-mentioned defective will be provided, and when number of stator slots becomes special ratios to concern with the rotor pole number form, can adopt concentric winding, thereby reduction manufacturing cost, enhance productivity, reduce copper cash consumption and copper loss, improve electric efficiency.
Another purpose of the present utility model is when number of stator slots becomes above-mentioned special ratios to concern with the rotor pole number form, can directly adopt the straight trough structure, further reduces manufacturing cost, enhances productivity and electric efficiency.
The purpose of this utility model is achieved in that permanent magnet DC motor, comprise stator and rotor, have teeth groove on the stator, teeth groove is embedded with winding, rotor is provided with permanent magnet pole, it is characterized in that each winding embedding in two adjacent teeth groove, and only contain an effective edge of a winding in each teeth groove, described stator teeth groove number with the ratio of rotor number of poles is:
For three phase electric machine be: 12K: 10K or 12K: 14K
For five-phase induction motor be: 20K: 22K or 20K: 18K
Wherein K is a positive integer.
As further improvement of the utility model, the motor teeth groove adopts straight trough.
The utility model is by being designed to certain proportionate relationship with number of stator slots and rotor number of poles, realizes adopting concentric winding construction and the normal starting and the running that can guarantee motor equally, produces following advantage therefrom:
One, processing is simple, can adopt mechanization to roll off the production line automatically, the production efficiency height, and cost is low;
Two, winding overhang is wire-saving, and copper loss is low, the electric efficiency height;
Three, the motor axial dimension is little, use and easy for installation;
Four, therefore the conductor that has only a phase winding in each stator slot need not phase insulation;
Therefore five, each phase winding does not contact each other, is decoupling zero on hot road, if like this certain around
Group breaks down, and overheated burning can not burnt other phase windings;
Six, each phase winding is decoupling zero on magnetic circuit, has mutual inductance between winding hardly, is convenient to control; And when certain phase winding breaks down, can not influence other phase windings because of magnetic coupling;
According to above analysis, each phase winding of this motor all is decoupling zero on Re Lu, magnetic circuit, circuit, not only be convenient to control, and fault-tolerance is more much higher than the motor of ordinary construction, and this is very important to permanent magnet DC motor, if certain parts damages, perhaps certain phase winding damages, can not cause the thorough damage of motor, motor can also continue to use, and is extended down to afterwards and is repaired.This motor application seems more superior on power assist vehicle or during field such as Aero-Space.
Be designed to aforementioned proportion when concerning at number of stator slots and rotor number of poles, can also realize the straight trough structure, thus further simplified structure, be convenient to processing, reduce the silicon steel sheet consumption, reduce manufacturing cost.
The invention will be further described below in conjunction with embodiment and accompanying drawing.
Fig. 1 is the structural representation of the utility model winding.
Fig. 2 is the utility model radial cross-section.
Fig. 3 be the utility model embodiment structural representation.
Fig. 4 is the structural representation of another embodiment of the utility model.
Embodiment one: the three-phase permanent direct current machine, and when K=1, the rotor number of poles is 10, stator teeth groove number is 12.Motor can adopt external stator, inner rotor core, also can adopt external rotor, internal stator structure, and Fig. 1,2,3 is depicted as external rotor, internal stator structure.With reference to Fig. 1, evenly offer 12 teeth groove 10 on stator 5 cylindricals, on the circle 10 permanent magnetism magnetic poles 3 are set evenly in the rotor 2, the polarity of adjacent pole is opposite.With reference to Fig. 2, teeth groove 10 adopts the straight trough structure, winding 4 adopts concentric winding construction, each winding with one heart in the same way embedding in adjacent two teeth groove, the first series connection of winding 4-1 and winding 4-4 constitutes a winding, the first series connection of winding 4-2 and winding 4-5, winding 4-3 and the first series connection of winding 4-6, constitute two windings in addition respectively, each winding respectively has an exit 11 to link to each other with control circuit.
Motor can adopt brush configuration, finishes commutation function by commutator.Certainly also can adopt brushless structure, control commutation by transducer and control circuit, transducer can adopt Hall element, photoelectric sensor or position-sensor-free.Adopt the motor of brushless structure and Hall element, Hall element can be placed on the end of winding, and rotor magnetic pole makes it corresponding with the position of Hall element axially suitably extending; Also can set up a rotor sensor, with the coaxial synchronous operation of rotor, Hall element is laid in the relevant position on stator; Certainly, the simplest method is that Hall element is placed in the teeth groove.In the present embodiment, three Hall elements 1 be placed on respectively adjacent embedding around first teeth groove of three phase windings in, that is: when motor was rotated counterclockwise, Hall element 1-1,1-2,1-3 were placed on respectively among teeth groove 10-1,10-3, the 10-5.
With reference to Fig. 3, this motor can be used as the drive unit of electric tool, and stator 5 is fixedlyed connected with fixed axis 8, closes in the left and right sides end cap 6, and in outer rim, the end cap centre flexibly connects by bearing 9 and fixed axis 8 with the rotor clamping; Fixed axis 8 hollows, power line 7 is therefrom drawn, and links to each other with control circuit on being installed in car body; Control circuit adopts the MC33035 of Motorola chip.The power of motor is 100W, compares the big 10-20NM of this electric motor starting moment with the traditional overlapping winding of equal-wattage and the motor of flume structure.
The course of work of above-mentioned motor is such: energized, rotor begin to rotate, and drive end cap and rotate, and end cap outreaches drill bit, drives drill bit thus and rotates together.
On the basis of the foregoing description, stator teeth groove number is set at 12 grooves, the rotor number of poles is set at 14 utmost points, can reach above-mentioned effect equally.
On the basis of embodiment one, adopt five phase winding structures, this stator teeth groove number is set at 20 grooves, and the rotor number of poles is set at 22 or 18 utmost points, and all the other structures are basic identical, can be effective too.
Embodiment two: electric vehicle three-phase permanent direct current machine, and stator teeth groove number is 24 grooves, and the rotor number of poles is 20 utmost points or 28 utmost points, and power is 180W, and all the other structures and embodiment one are basic identical, can be with reference to Fig. 3, end cap 6 is as nave boss at this moment, and fixed axis 8 is axletree.
The electric vehicle three-phase is such with the course of work of three-phase permanent direct current machine: energized, and external rotor rotates, and drives nave boss and rotates, and nave boss outreaches steel wire and wheel, drives wheel thus and rotates together.
On this basis, use five phase windings instead, stator teeth groove number is set at 40 grooves, and the rotor number of poles is set at 44 utmost points or 36 utmost points, can reach effect same.
Embodiment three: with reference to Fig. 4, the window air conditioner three-phase DC motor, power is 500W, adopts internal rotor, outer stator structure, and the teeth groove number of stator 5 is 36 grooves, the number of poles of rotor 2 is 30 or 42 utmost points, having installing hole on the left and right sides end cap 6, by bolt 14 stator 5 is fixed in it, turns up and forms two footing 15 in end cap bottom in the left and right sides, have installing hole on the footing 15, be fixed on by screw 16 in the shell 17 of air conditioner; Rotor 2 centers are provided with rotating shaft 8, and rotating shaft 8 is actively connected on the end cap 6 by bearing 9, and fan blade 12 is fixed on the shaft extension end of rotating shaft 8 by nut 13.Other structures and embodiment one are basic identical.Drive fan blade when motor rotates and rotate, finish the air-supply function.
On this basis, use five phase windings instead, stator teeth groove number is set at 60 grooves, and the rotor number of poles is set at 66 utmost points or 54 utmost points, can reach effect same.
Embodiment four: split-type air conditioner three-phase DC motor, power are 1000W, and stator teeth groove number is 48 grooves, and the rotor number of poles is 40 utmost points or 56 utmost points, and all the other structures and embodiment three are basic identical.
On this basis, use five phase windings instead, stator teeth groove number is set at 80 grooves, and the rotor number of poles is set at 88 utmost points or 72 utmost points, can reach effect same.
The utility model is not limited to above-mentioned execution mode, and the K value can change along with the difference of power of motor, and power of motor increases, and corresponding K value also increases, as long as satisfy the ratio of stator teeth groove number and rotor number of poles is:
For three phase electric machine be: 12K: 10K or 12K: 14K;
For five-phase induction motor be: 20K: 22K or 20K: 18K can both be effective.
Claims (6)
1, permanent magnet DC motor, comprise stator (5) and rotor (2), have teeth groove (10) on the stator (5), teeth groove (10) is embedded with winding (4), rotor (2) is provided with permanent magnet pole (3), it is characterized in that each winding embedding in two adjacent teeth groove, and only contain an effective edge of a winding in each teeth groove, described stator teeth groove number with the ratio of rotor number of poles is:
Elect as for three phase electric machine: 12K: 10K or 12K: 14K;
Elect as for five-phase induction motor: 20K: 22K or 20K: 18K;
Wherein K is a positive integer.
2, permanent magnet DC motor as claimed in claim 1 is characterized in that described K value is 1.
3, permanent magnet DC motor as claimed in claim 1 is characterized in that described K value is 2.
4, permanent magnet DC motor as claimed in claim 1 is characterized in that described K value is 3.
5, permanent magnet DC motor as claimed in claim 1 is characterized in that described K value is 4.
6,, it is characterized in that described teeth groove (10) is a straight trough as any described permanent magnet DC motor of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98225156 CN2357434Y (en) | 1998-09-21 | 1998-09-21 | Permanent-magnet DC electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98225156 CN2357434Y (en) | 1998-09-21 | 1998-09-21 | Permanent-magnet DC electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2357434Y true CN2357434Y (en) | 2000-01-05 |
Family
ID=33975899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98225156 Expired - Fee Related CN2357434Y (en) | 1998-09-21 | 1998-09-21 | Permanent-magnet DC electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2357434Y (en) |
Cited By (1)
| 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 |
-
1998
- 1998-09-21 CN CN 98225156 patent/CN2357434Y/en not_active Expired - Fee Related
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 |
| 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 |
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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 |