CN204442042U - A kind of mixed excitation electric machine - Google Patents
A kind of mixed excitation electric machine Download PDFInfo
- Publication number
- CN204442042U CN204442042U CN201520125400.5U CN201520125400U CN204442042U CN 204442042 U CN204442042 U CN 204442042U CN 201520125400 U CN201520125400 U CN 201520125400U CN 204442042 U CN204442042 U CN 204442042U
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- magnet steel
- rotor
- excitation
- electric machine
- magnetic
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- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
A kind of mixed excitation electric machine, comprise stator and be arranged at the rotor in described stator, described rotor comprises the rotor rack and the magnet steel be arranged on described rotor rack and excitation winding that form this rotor main support portion, described rotor rack is evenly provided with some motor pole along cross-sectional circumferential, be provided with the first magnet steel be made up of permanent magnet between adjacent described motor pole, described motor extremely in be provided with the second magnet steel and described excitation winding that are made up of permanent magnet; Described first magnet steel is identical with the magnetic pole of described second magnet steel near one end of described rotor circumference, and the volume of described first magnet steel is greater than described second magnet steel.The utility model possesses larger speed adjustable range and less rare earth use amount, and cost is low.
Description
Technical field
The present invention relates to a kind of excitation electromotor, particularly relate to a kind of excitation electromotor of the mixing be made up of magnet steel and excitation winding.
Background technology
Close the engine system of power car, can at higher rotary speed working while of the output torque requiring motor can provide larger, Constant-power speed range is preferably over 6 times, and the permagnetic synchronous motor Constant-power speed range extensively adopted at present is often not more than 3 times, then effect is poorer to adopt other schemes.Therefore be badly in need of proposing a kind of scheme can taking into account high pulling torque and wide speed range work.
Publication number CN101621235 patent discloses a kind of motor, can overcome the problem that existing motor permanent magnet is expensive, copper loss is high, but this motor still cannot obtain larger speed adjustable range.
Summary of the invention
The present invention, for solving prior art problem, provides a kind of speed adjustable range large, the motor that cost is lower simultaneously, use rare earth is less.
Technical scheme of the present invention is: a kind of mixed excitation electric machine, comprise stator and be arranged at the rotor in described stator, described rotor comprises the rotor rack and the magnet steel be arranged on described rotor rack and excitation winding that form this rotor main support portion, described rotor rack is evenly provided with some motor pole along cross-sectional circumferential, be provided with the first magnet steel be made up of permanent magnet between adjacent described motor pole, described motor extremely in be provided with the second magnet steel and described excitation winding that are made up of permanent magnet; Described first magnet steel is identical with the magnetic pole of described second magnet steel near one end of described rotor circumference, and the volume of described first magnet steel is greater than described second magnet steel.
As preferably, on described rotor rack, the place of keeping to the side is provided with the first magnetic groove between adjacent described motor pole, and described first magnetic slot length is roughly along described rotor rack cross-sectional periphery distribution, and described first magnet steel is arranged in described first magnetic groove; Described first magnetic groove comprises two half-unit, this two half-unit be interconnected and relative to adjacent described motor extremely in the middle of radius mirror to distribution, this two half-unit all comprises the bearing cavity for carrying described first magnet steel, two described bearing cavity outer surfaces of two half-unit all to intrinsic deflection, to make the magnet-wire of two blocks of described first magnet steel being positioned at two described bearing cavitys be convergence form.
As preferably, described excitation winding be arranged at be positioned at described second magnet steel both sides and relatively described second magnet steel mirror to the excitation chamber arranged; The axis of described excitation winding parallels with the magnetic line of force of described second magnet steel.
As preferably, the edge of described rotor rack is provided with the first magnetic groove along its length between adjacent described motor pole, and described first magnet steel is arranged in described first magnetic groove.
As preferably, described first magnet steel is arranged at the centre of adjacent described second magnet steel.
As preferably, the cross section of described first magnet steel is trapezoidal, and described first magnetic groove cross section is swallow-tail form.
As preferably, described excitation winding be arranged at be positioned at described second magnet steel both sides and relatively described second magnet steel mirror to the excitation chamber arranged; The axis of described excitation winding parallels with the magnetic line of force of described second magnet steel.
As preferably, described excitation winding be arranged at be positioned at described second magnet steel both sides and relatively described second magnet steel mirror to the excitation chamber arranged; The axis of described excitation winding parallels with the magnetic line of force of described second magnet steel.
As preferably, described excitation chamber is be arranged at described second magnet steel both sides and perpendicular to the channel-shaped cavity opened in described rotor outer surface of described second magnet steel place string, described excitation chamber opening is positioned at described rotor outer surface.
As preferably, the opening both sides in described excitation chamber have stop groove, are provided with the block piece be made up of insulating material for preventing described excitation winding from departing from described rotor in described stop groove.
In the structure of this motor, the first magnet steel and the second magnet steel, excitation winding adopt magnetic field parallel way, possess stronger electric composite excitation ability, compared to series system, do not limit by pole piece.The magnetic field half of this motor is produced by the first magnet steel, and second half is produced by excitation winding and the second magnet steel.
The magnet steel of this motor and excitation winding are only placed on the single magnetic pole of N pole or S pole, first magnet steel and the equal radial arrangement of the second magnet steel, the quantity of excitation winding is only the half of number of pole-pairs, structure is simpler, anufacturability is better, not same-action all born by two groups of magnet steel simultaneously, greatly can reduce the use of rare-earth permanent magnet, efficiency is higher, cost is lower.
In sum, the present invention has the following advantages:
1, larger speed adjustable range is possessed;
2, less rare earth use amount, cost is low.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention one structural representation;
Rotor magnetic line schematic diagram when Fig. 2 is motor no power of the present invention;
Rotor magnetic line schematic diagram when Fig. 3 is motor forward of the present invention energising;
Fig. 4 is motor of the present invention rotor magnetic line schematic diagram when being oppositely energized;
Fig. 5 is the embodiment of the present invention two structural representation.
In figure, 1, stator, 11, armature frame, 12, armature winding, 2, rotor, the 21, first magnet steel, the 22, second magnet steel, 23, excitation winding, 24, duplicate removal hole, 25, rotor rack.
Embodiment
With embodiment, the invention will be further described below.
Embodiment one:
A kind of mixed excitation electric machine, the rotor 2 comprising stator 1 and be arranged in stator 1, rotor 2 comprises the rotor rack 25 and the magnet steel be arranged on rotor rack 25 and excitation winding 23 that form this main support portion of rotor 2, rotor rack 25 is evenly provided with some motor pole along cross-sectional circumferential, be provided with the first magnet steel 21 be made up of permanent magnet between adjacent motor pole, motor extremely in be provided with the second magnet steel 22 and excitation winding 23 that are made up of permanent magnet; First magnet steel 21 is identical with the magnetic pole of the second magnet steel 22 near one end of rotor 2 circumference.
On rotor rack 25, the place of keeping to the side is provided with the first magnetic groove between adjacent motor pole, and the first magnetic slot length is roughly along the distribution of rotor rack 25 cross-sectional periphery, and the first magnet steel 21 is arranged in the first magnetic groove; First magnetic groove comprises two half-unit, this two half-unit be interconnected and relative to adjacent motor extremely in the middle of radius mirror to distribution, this two half-unit all comprises the bearing cavity for carrying the first magnet steel 21, two bearing cavity outer surfaces of two half-unit, all to intrinsic deflection, are convergence form to make the magnet-wire of two piece of first magnet steel 21 being positioned at two bearing cavitys.
Excitation winding 23 be arranged at be positioned at the second magnet steel 22 both sides and relative second magnet steel 22 mirror to arrange excitation chamber; The axis of excitation winding 23 parallels with the magnetic line of force of the second magnet steel 22.Excitation chamber is be arranged at the second magnet steel 22 both sides and perpendicular to the channel-shaped cavity opened in rotor 2 outer surface of the second magnet steel 22 place string, excitation chamber opening is positioned at rotor 2 outer surface.The opening both sides in excitation chamber have stop groove, stop in groove the block piece be made up of insulating material be provided with for preventing excitation winding 23 from departing from rotor 2.
In this electric machine structure, the volume of the first magnet steel 21 is greater than the second magnet steel 22, and the quantity of the first magnet steel 21 and the second magnet steel 22 is equal, is the half of motor number of pole-pairs; Excitation winding 23 is around in the second magnet steel 22 outer ring simultaneously, and its quantity is also the half of motor number of pole-pairs.The rotor rack 25 of rotor 2 having some duplicate removal holes 24, for reducing weight as far as possible on the basis ensureing rotor 2 structural strength, to reduce the rotation inertia of rotor 2, increasing electric machine rotation moment of torsion.Excitation chamber opening part is by stopping that groove and block piece ensure the fixing of excitation winding 23, avoid rotor 2 winding when High Rotation Speed to come off from rotor 2, block piece can be insulation board, and excitation winding 23 also promotes constant intensity by colligation in duplicate removal hole 24 further.
The stator 1 of this motor is made up of armature frame 11 and the armature winding 12 be around on armature frame 11, and armature winding 12 can be concentratred winding mode, also can be distributed winding mode.
When excitation winding 23 no power, the excitatory of motor is produced by the first magnet steel 21, first magnet steel 21 directly produces unipolarity, i.e. N pole or S pole to air gap, and the first magnet steel 21 reversed polarity is imported air gap and produces excitatory to stator 1 by the double wedge of the rotor 2 of the first magnet steel 21 both sides.The polarity of the second magnet steel 22 is identical with the first magnet steel 21, the double wedge of the second magnet steel 22 place rotor 2 is not by the reversed pole of the first magnet steel 21 guiding air gap, now the double wedge of this second magnet steel 22 place rotor 2 is identical with the first magnet steel 21 to the polarity of stator 1, but the magnetic line of force of the second magnet steel 22 forms leakage field magnetic circuit mainly through place magnetic, and excitatory magnetic is close very low.Therefore during rotor 2 excitation-free current, rotor 2 cylindrical is that N, S pole is alternately distributed, but main magnetic flux has the first magnet steel 21 to produce, that is: the total magnetic linkage of armature equals the excitatory magnetic linkage of the first magnet steel 21.
When passing into forward current work in excitation winding 23, so-called forward current and excitation winding 23 produce and the second magnet steel 22 identical polar, first magnet steel 21 directly produces unipolarity to air gap, i.e. N pole or S pole, excitation winding 23 produces motor stator 1 and the first magnet steel 21 identical polar excitatory together with the second magnet steel 22, namely the magnetic line of force is simultaneously by excitation winding 23 and the second magnet steel 22, and the second magnet steel 22 no longer forms leakage field in the double wedge of place rotor 2.It is excitatory to stator 1 that first magnet steel 21 and the common reversed polarity of excitation winding 23 are imported air gap by rotor 2 double wedge of the first magnet steel 21 both sides, now, armature total magnetic linkage=the first magnet steel 21 excitatory magnetic linkage+excitation winding 23 pole magnetic linkage, excitation winding 23 pairs of motors play and obviously increase magnetic, reduce the effect of rare earth use amount, realize motor low-speed big function, when motor sends more high voltage as making motor during generator operation under same rotational speed.
When passing into reverse current work in excitation winding 23, so-called reverse current and excitation winding 23 produce and the second magnet steel 22 opposite polarity, first magnet steel 21 directly produces unipolarity to air gap, i.e. N pole or S pole, the magnetic line of force of the second magnet steel 22 all forms leakage field by place tooth inside, the magnetic line of force that excitation winding 23 produces is not by the second magnet steel 22, and it is excitatory to produce reversed polarity by the magnetic conductor being close to the second magnet steel 22 both sides to air gap.Decline during the relative excitation-free current of the excitation ability of double wedge to air gap on the rotor 2 of the first magnet steel 21 both sides.Now have: armature total magnetic linkage=the first magnet steel 21 excitatory magnetic linkage-excitation winding 23 pole magnetic linkage, excitation winding 23 pairs of motors serve weak magnetic effect, for the little moment of torsion work of motor high speed creates conditions, can realize when generator operation made by motor under same rotational speed with low-voltage output.
Embodiment two:
A kind of mixed excitation electric machine, the rotor 2 comprising stator 1 and be arranged in stator 1, rotor 2 comprises the rotor rack 25 and the magnet steel be arranged on rotor rack 25 and excitation winding 23 that form this main support portion of rotor 2, rotor rack 25 is evenly provided with some motor pole along cross-sectional circumferential, be provided with the first magnet steel 21 be made up of permanent magnet between adjacent motor pole, motor extremely in be provided with the second magnet steel 22 and excitation winding 23 that are made up of permanent magnet; First magnet steel 21 is identical with the magnetic pole of the second magnet steel 22 near one end of rotor 2 circumference.
The edge of rotor rack 25 is provided with the first magnetic groove along its length between adjacent motor pole, and the first magnet steel 21 is arranged in the first magnetic groove, and is positioned at the centre of adjacent second magnet steel 22.The cross section of the first magnet steel 21 is trapezoidal, and the first magnetic groove cross section is swallow-tail form.Excitation winding 23 be arranged at be positioned at the second magnet steel 22 both sides and relative second magnet steel 22 mirror to arrange excitation chamber; The axis of excitation winding 23 parallels with the magnetic line of force of the second magnet steel 22.
Claims (9)
1. a mixed excitation electric machine, comprise stator (1) and be arranged at the rotor (2) in described stator (1), described rotor (2) comprises the rotor rack (25) forming this rotor (2) main support portion, and the magnet steel be arranged on described rotor rack (25) and excitation winding (23), it is characterized in that: described magnet steel comprises the first magnet steel (21) and the second magnet steel (22), described rotor rack (25) is evenly provided with some motor pole along cross-sectional circumferential, the first magnet steel (21) be made up of permanent magnet is provided with between adjacent described motor pole, described motor extremely in be provided with the second magnet steel (22) and described excitation winding (23) that are made up of permanent magnet, described first magnet steel (21) is identical with the magnetic pole of described second magnet steel (22) near one end of described rotor (2) circumference, and the volume of described first magnet steel (21) is greater than described second magnet steel (22).
2. mixed excitation electric machine according to claim 1, it is characterized in that: on described rotor rack (25), the place of keeping to the side is provided with the first magnetic groove between adjacent described motor pole, described first magnetic slot length is roughly along the distribution of described rotor rack (25) cross-sectional periphery, and described first magnet steel (21) is arranged in described first magnetic groove; Described first magnetic groove comprises two half-unit, this two half-unit be interconnected and relative to adjacent described motor extremely in the middle of radius mirror to distribution, this two half-unit all comprises the bearing cavity for carrying described first magnet steel (21), two described bearing cavity outer surfaces of two half-unit all to intrinsic deflection, to make the magnet-wire of two pieces of described first magnet steel (21) being positioned at two described bearing cavitys be convergence form.
3. mixed excitation electric machine according to claim 2, is characterized in that: described excitation winding (23) be arranged at be positioned at described second magnet steel (22) both sides and relatively described second magnet steel (22) mirror to the excitation chamber arranged; The axis of described excitation winding (23) parallels with the magnetic line of force of described second magnet steel (22).
4. mixed excitation electric machine according to claim 1, is characterized in that: the edge of described rotor rack (25) is provided with the first magnetic groove along its length between adjacent described motor pole, and described first magnet steel (21) is arranged in described first magnetic groove.
5. mixed excitation electric machine according to claim 4, is characterized in that: described first magnet steel (21) is arranged at the centre of adjacent described second magnet steel (22).
6. mixed excitation electric machine according to claim 5, it is characterized in that: the cross section of described first magnet steel (21) is trapezoidal, described first magnetic groove cross section is swallow-tail form.
7. mixed excitation electric machine according to claim 4 ~ 6 any one, is characterized in that: described excitation winding (23) be arranged at be positioned at described second magnet steel (22) both sides and relatively described second magnet steel (22) mirror to arrange excitation chamber; The axis of described excitation winding (23) parallels with the magnetic line of force of described second magnet steel (22).
8. mixed excitation electric machine according to claim 7, it is characterized in that: described excitation chamber is for being arranged at described second magnet steel (22) both sides and perpendicular to the channel-shaped cavity opened in described rotor (2) outer surface of described second magnet steel (22) place string, described excitation chamber opening is positioned at described rotor (2) outer surface.
9. mixed excitation electric machine according to claim 8, it is characterized in that: the opening both sides in described excitation chamber have stop groove, in described stop groove, being provided with the block piece be made up of insulating material for preventing described excitation winding (23) from departing from described rotor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520125400.5U CN204442042U (en) | 2015-03-04 | 2015-03-04 | A kind of mixed excitation electric machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520125400.5U CN204442042U (en) | 2015-03-04 | 2015-03-04 | A kind of mixed excitation electric machine |
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| Publication Number | Publication Date |
|---|---|
| CN204442042U true CN204442042U (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520125400.5U Expired - Fee Related CN204442042U (en) | 2015-03-04 | 2015-03-04 | A kind of mixed excitation electric machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638792A (en) * | 2015-03-04 | 2015-05-20 | 浙江迈雷科技有限公司 | Mixed excitation motor |
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2015
- 2015-03-04 CN CN201520125400.5U patent/CN204442042U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638792A (en) * | 2015-03-04 | 2015-05-20 | 浙江迈雷科技有限公司 | Mixed excitation motor |
| CN104638792B (en) * | 2015-03-04 | 2018-05-11 | 浙江迈雷科技有限公司 | A kind of mixed excitation electric machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20160304 |