CN103326520B - Optimum design method of rotor claw pole of automobile generator - Google Patents
Optimum design method of rotor claw pole of automobile generator Download PDFInfo
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- CN103326520B CN103326520B CN201310236565.5A CN201310236565A CN103326520B CN 103326520 B CN103326520 B CN 103326520B CN 201310236565 A CN201310236565 A CN 201310236565A CN 103326520 B CN103326520 B CN 103326520B
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Abstract
The invention discloses an optimum design method of a rotor claw pole of an automobile generator. The optimum design method of the rotor claw pole of the automobile generator is characterized in that the width of the pole tip of the N pole of the rotor claw is b1, and the width of the pole root of the N pole is b2; the width of the pole tip of the S pole of the rotor claw is b3, and the width of the pole root of the S pole is b4; the initial value of the motor efficiency of the automobile generator is eta 0, and the initial value of the cogging torque of the automobile generator is Tcog 0; by adjusting b1, b2,b3 and b4, the optimal value eta of the motor efficiency and the optimal value Tcog of the cogging torque are obtained, and the optimal value eta of the motor efficiency and the optimal value Tcog of the cogging torque meet the conditions that eta is bigger than eta 0 and Tcog is smaller than the optimal value ranges of b1, b2,b3 and b4 of Tcog 0, and within the optimal value ranges, the pole tip width and the pole root width of the N pole of the rotor claw pole, and the pole tip width and the pole root width of the S pole of the rotor claw pole are adjusted. According to the optimum design method of the rotor claw pole of the automobile generator, by changing the pole tip widths and the pole root widths of the rotor claw pole of the automobile generator, the cogging torque of the automobile generator can be reduced, and the motor efficiency of the automobile generator can be improved at the same time.
Description
Technical field
The present invention relates to automobile current generator, relate to a kind of optimum design method of rotor claw pole of automobile generator in particular.
Background technology
In the magnetic pole parameter of automobile current generator, pole tip width and the pole root width of rotor claw pole are particularly important.The pole tip width of automobile generator rotor pawl pole and the selection of pole root width not only affect the cogging torque of automobile current generator, also affect the efficiency of automobile current generator, must rationally determine.The rotor of automobile current generator and the tangential component of stator teeth groove interaction force form cogging torque, and the torque pulsation that cogging torque causes is the major reason that automobile current generator vibration & noise produces.The method of the vibration & noise of current control automobile claw pole generator electromagnetism aspect is mainly set about from the radial electromagnetic force ripple of air gap and stator mode frequency, analyze electromagnetic force wave number of times that various poles slot fit may exist and predict electric machine structure each rank radial mode shape frequency, select under the prerequisite ensureing mechanical performance index as far as possible each electromagnetic force wave highest frequency lower than and away from the pole slot fit of the corresponding radial direction of electric machine structure each rank model frequency.But in existing automobile current generator, even if having selected rational pole slot fit still there is larger electric and magnetic oscillation and noise, reason does not change separately the cogging torque that the magnetic pole parameter of motor or armature parameter weaken motor further.In existing automobile claw pole generator, the pole tip width of the N pole magnetic pole of rotor claw pole is equal with the pole tip width of S pole magnetic pole, and the pole root width of its N pole magnetic pole is equal with the pole root width of S pole magnetic pole.
Current automobile current generator is when doing cogging torque and optimizing, easily ignore the impact on efficiency, be not optimized automobile current generator with regard to cogging torque and efficiency in other words, particularly when the magnetic pole parameter of pawl pole changes larger, the efficiency change of automobile current generator is larger simultaneously.Therefore, composite vehicle generator cogging torque and efficiency, optimize rotor claw pole magnetic pole parameter and become current problem demanding prompt solution.
Summary of the invention
The present invention, for solving the problem, provides a kind of optimum design method of rotor claw pole of automobile generator, to while the electric efficiency improving automobile current generator, reducing the cogging torque of automobile current generator.
The present invention adopts following technical scheme for solving the problems of the technologies described above:
The feature of optimum design method of rotor claw pole of automobile generator of the present invention is: the pole tip width making the N pole magnetic pole of described rotor claw pole is b
1and pole root width is b
2; The pole tip width making the S pole magnetic pole of described rotor claw pole is b
3and pole root width is b
4; The initial value of the electric efficiency of described automobile current generator is made to be η
0, make the initial value of the cogging torque of described automobile current generator be T
cog0; Be parameter to be optimized with described electric efficiency and described cogging torque, by adjustment b
1, b
2, b
3and b
4, obtain the optimal value η of electric efficiency and the optimal value T of cogging torque
cog, determine to make the optimal value η of electric efficiency and the optimal value T of cogging torque
cogsatisfy condition: η > η
0and T
cog<T
cog0b
1, b
2, b
3and b
4optimum span, in described optimum span, adjust pole tip width and the pole root width of the N pole magnetic pole of rotor claw pole, and the pole tip width of the S pole magnetic pole of rotor claw pole and pole root width.
The feature of optimum design method of rotor claw pole of automobile generator of the present invention is also: described b
1, b
2, b
3and b
4optimum span calculate acquisition as follows:
A, b is set
1>b
3, b
2>b
4and b
1+ b
4=b
2+ b
3, or b is set
3>b
1, b
4>b
2and b
1+ b
4=b
2+ b
3;
B, by motor modeling and simulating software modeling emulation, adjustment b
1, b
2, b
3and b
4, make the optimal value T of cogging torque
cogat (0.95T
cog0, 1.05T
cog0) the interior change of scope, and the optimal value η of electric efficiency is at (0.99 η
0, 1.01 η
0) the interior change of scope, obtain b
1, b
2, b
3and b
4span: b
1∈ (b
1n, b
1m), b
2∈ (b
2n, b
2m), b
3∈ (b
3n, b
3m) and b
4∈ (b
4n, b
4m);
C, at b
1∈ (b
1n, b
1m), b
2∈ (b
2n, b
2m), b
3∈ (b
3n, b
3m) and b
4∈ (b
4n, b
4m) scope in adjustment b
1, b
2, b
3, b
4, make T
cog<T
cog0and air-gap flux meets
wherein φ
1for b
1, b
2, b
3and b
4initial air-gap flux before adjustment, φ
2for b
1, b
2, b
3and b
4optimization air-gap flux after adjustment, b after order adjustment
1, b
2, b
3and b
4be respectively b
1', b
2', b
3' and b
4', obtain b
1', b
2', b
3' and b
4' span: b
1' ∈ (b
1n', b
1m'), b
2' ∈ (b
2n', b
2m'), b
3' ∈ (b
3n', b
3m') and b
4' ∈ (b
4n', b
4m');
D, at b
1∈ (b
1n, b
1m)
,b
2∈ (b
2n, b
2m)
,b
3∈ (b
3n, b
3m) and b
4∈ (b
4n, b
4m) scope in adjustment b
1, b
2, b
3and b
4, make η > η
0, b after order adjustment
1, b
2, b
3and b
4be respectively b
1", b
2", b
3" and b
4", obtain b
1", b
2", b
3", b
4" span: b
1" ∈ (b
1n", b
1m"), b
2" ∈ (b
2n", b
2m"), b
3" ∈ (b
3n", b
3m") and b
4" ∈ (b
4n", b
4m");
E, make b
1" ', b
2" ', b
3" ' and b
4" ' be b
1, b
2, b
3and b
4optimal value, obtain b
1" ', b
2" ', b
3" ' and b
4" ' span be: b " '
1∈ (b '
1n, b '
1m) ∩ (b "
1n, b "
1m), b " '
2∈ (b'
2n, b'
2m) ∩ (b "
2n, b "
2m), b " '
3∈ (b '
3n, b '
3m) ∩ (b "
3n, b "
3m) and b " '
4∈ (b '
4n, b '
4m) ∩ (b "
4n, b "
4m);
Described b
1" ', b
2" ', b
3" ' and b
4" ' span be and make optimization electric efficiency η and optimize cogging torque T
cogsatisfy condition:: η > η
0and T
cog<T
cog0b
1, b
2, b
3and b
4optimum span.
If f is b
1" ', b
2" ', b
3" ', b
4" ' is all empty set, then step b is adjusted to T
cogat ((0.95-0.01m) T
cog0, (1.05+0.01m) T
cog0) the interior change of scope, and efficiency eta is at ((0.99-0.01n) η
0, (1.01+0.01n) η
0) the interior change of scope, wherein m=1,2,3 ..., 10; N=1,2,3; M, n are combined.
Compared with the prior art, beneficial effect of the present invention is embodied in:
The present invention is by changing pole tip width and the pole root width of automobile generator rotor pawl pole, namely the cogging torque of automobile current generator can be reduced, also can improve the electric efficiency of automobile current generator, for high performance automobile generator rotor pawl pole provides Theoretical Design foundation simultaneously.
Accompanying drawing explanation
Fig. 1 is that expanded view is overlooked in automobile generator rotor pawl pole of the present invention.
Detailed description of the invention
The rotor claw pole of the present embodiment to 14V/1Kw automobile claw pole generator is optimized.
In the present embodiment, the feature of optimum design method of rotor claw pole of automobile generator is: the pole tip width making the N pole magnetic pole of rotor claw pole is b
1and pole root width is b
2; The pole tip width making the S pole magnetic pole of rotor claw pole is b
3and pole root width is b
4; The initial value of the electric efficiency of automobile current generator is made to be η
0, make the initial value of the cogging torque of automobile current generator be T
cog0; Be parameter to be optimized with electric efficiency and described cogging torque, by adjustment b
1, b
2, b
3and b
4, obtain the optimal value η of electric efficiency and the optimal value T of cogging torque
cog, determine to make the optimal value η of electric efficiency and the optimal value T of cogging torque
cogsatisfy condition: η > η
0and T
cog<T
cog0b
1, b
2, b
3and b
4optimum span, in optimum span, adjust pole tip width and the pole root width of the N pole magnetic pole of rotor claw pole, and the pole tip width of the S pole magnetic pole of rotor claw pole and pole root width.
The b of the present embodiment 14V/1Kw automobile claw pole generator
1, b
2, b
3and b
4initial value be respectively: 6.55mm, 16.10mm, 6.55mm, 16.10mm; η
0be 58.6254%; T
cog0for 12.8Nm;
B
1, b
2, b
3and b
4optimum span calculate acquisition as follows:
A, for ensureing the uniformity of motor gas-gap, b is set
1>b
3, b
2>b
4and b
1+ b
4=b
2+ b
3, or b is set
3>b
1, b
4>b
2and b
1+ b
4=b
2+ b
3;
B, by the emulation of motor modeling and simulating software modeling, when keeping automobile current generator other input parameter constant, adjustment b
1, b
2, b
3and b
4, make the optimal value T of cogging torque
cogat (0.95T
cog0, 1.05T
cog0) the interior change of scope, and the optimal value η of electric efficiency is at (0.99 η
0, 1.01 η
0) the interior change of scope, obtain b
1, b
2, b
3and b
4span: b
1∈ (5.93mm, 7.16mm), b
2∈ (15.24mm, 16.97mm), b
3∈ (5.93mm, 7.16mm) and b
4∈ (15.24mm, 16.97mm);
Generator modeling simulation software can adopt a arbitrarily on the market, if Ansoft (is electromagnetic software, model specification is Version 12.0, making distributing and releasing corporation is ANSOFT), Ansys (be merge structure, fluid etc. analyze with one large-scale general finite element analysis software, model specification is Version 14.0, making distributing and releasing corporation is U.S. ANSYS) etc., the present embodiment adopts Ansoft software, and when modeling, the value of other parameters is as shown in table 1:
Table 1
| Basic parameter title (unit) | Basic parameter settings |
| The number of phases | 3 |
| Rated voltage (V) | 9.9 |
| Induction phase voltage (V) | 13.86 |
| Phase current (A) | 18.49 |
| Number of poles | 12 |
| Groove number | 36 |
| Frequency (Hz) | 150 |
| Rated power factor | 0.8 |
| Stator outer diameter (mm) | 115 |
| Diameter of stator bore (mm) | 90.2 |
| Stator tooth top wide (mm) | 2.8 |
| Stator tooth bottom wide (mm) | 2.8 |
| Stator core length (mm) | 30.4 |
| Stator core lamination coefficient (mm) | 0.95 |
| The stator silicon steel sheet trade mark | L800_65 |
| Parallel branch number | 1 |
| Every groove conductor number | 13 |
| Average coil pitch | 3 |
| And around radical | 1 |
| Wire diameter (mm) | 1.35mm |
| The bilateral insulation thickness of wire (mm) | 0.08 |
| Armature half turn (mm) | 76.15 |
| Restriction stator copper factor (%) | 75 |
| Stator copper factor (%) | 63.16 |
| Gas length (mm) | 0.3 |
| The rotor diameter of axle (mm) | 17.7 |
| Rotor pole yoke diameter (mm) | 45.6 |
| Rotor slot thickness (mm) | 10 |
| Magnetic pole length (mm) | 27.2 |
| Rotor length (mm) | 52.2 |
| Pole shoe thickness (mm) | 11.3 |
| Wind moussing loss (W) | 0.6 |
| Synchronous rotational speed (rpm) | 1500 |
| Rated speed (rad/s) | 157.08 |
| Power-factor angle (°) | 36.87 |
C, at b
1∈ (b
1n, b
1m), b
2∈ (b
2n, b
2m), b
3∈ (b
3n, b
3m), b
4∈ (b
4n, b
4m) scope interior adjustment b
1, b
2, b
3, b
4, make T
cog<T
cog0and air-gap flux meets
wherein φ
1for b
1, b
2, b
3and b
4initial air-gap flux before adjustment, φ
2for b
1, b
2, b
3and b
4optimization air-gap flux after adjustment, b after order adjustment
1, b
2, b
3and b
4be respectively b
1', b
2', b
3' and b
4', obtain b
1', b
2', b
3' and b
4' span: b
1' ∈ (6.73mm, 6.98mm), b
2' ∈ (16.25mm, 16.54mm), b
3' ∈ (6.22mm, 6.41mm) and b
4' ∈ (15.68mm, 15.89mm);
D, at b
1∈ (b
1n, b
1m), b
2∈ (b
2n, b
2m), b
3∈ (b
3n, b
3m), b
4∈ (b
4n, b
4m) scope interior adjustment b
1, b
2, b
3and b
4, make η > η
0, b after order adjustment
1, b
2, b
3and b
4be respectively b
1", b
2", b
3" and b
4", obtain b
1", b
2", b
3", b
4" span: b
1" ∈ (6.69mm, 6.84mm), b
2" ∈ (16.18mm, 16.37mm), b
3" ∈ (6.30mm, 6.46mm) and b
4" ∈ (15.84mm, 16.02mm);
E, make b
1" ', b
2" ', b
3" ' and b
4" ' be b
1, b
2, b
3and b
4optimal value, obtain b
1" ', b
2" ', b
3" ' and b
4" ' span be: b " '
1∈ (6.73mm, 6.84mm), b " '
2∈ (16.25mm, 16.37mm), b " '
3∈ (6.30mm, 6.41mm) and b " '
4∈ (15.84mm, 15.89mm);
B
1" ', b
2" ', b
3" ' and b
4" ' span be and make optimization electric efficiency η and optimize cogging torque T
cogsatisfy condition: η > η
0, T
cog<T
cog0b
1, b
2, b
3and b
4optimum span.
When selecting b in enforcement
16.78mm is adapted to, b from 6.55mm
216.32mm is adapted to, b from 16.10mm
36.33mm is adapted to, b from 6.55mm
4be adapted to 15.87mm from 16.10mm, electric efficiency brings up to 59.0368%, and generator cogging torque have dropped 3.24% simultaneously,
In addition, if b
1" ', b
2" ', b
3" ', b
4" ' is all empty set, then step b is adjusted to T
cogat ((0.95-0.01m) T
cog0, (1.05+0.01m) T
cog0) the interior change of scope, and efficiency eta is at ((0.99-0.01n) η
0, (1.01+0.01n) η
0) the interior change of scope, wherein m=1,2,3 ..., 10; N=1,2,3; M, n are combined.
The present embodiment is by the pole tip that changes automobile generator rotor pawl and extremely go up and pole root width, change the magnetic pole parameter of motor, affect air-gap field spatial distribution, thus the caused cogging torque that interacts between weakening air-gap field and stator teeth groove, reduce its torque pulsation, improve electric efficiency simultaneously, thus provide Theoretical Design foundation for high performance claw-pole motor.
Claims (2)
1. an optimum design method of rotor claw pole of automobile generator, is characterized in that: the pole tip width making the N pole magnetic pole of described rotor claw pole is b
1and pole root width is b
2; The pole tip width making the S pole magnetic pole of described rotor claw pole is b
3and pole root width is b
4; The initial value of the electric efficiency of described automobile current generator is made to be η
0, make the initial value of the cogging torque of described automobile current generator be T
cog0; Be parameter to be optimized with described electric efficiency and described cogging torque, by adjustment b
1, b
2, b
3and b
4, obtain the optimal value η of electric efficiency and the optimal value T of cogging torque
cog, determine to make the optimal value η of electric efficiency and the optimal value T of cogging torque
cogsatisfy condition: η > η
0and T
cog<T
cog0b
1, b
2, b
3and b
4optimum span, in described optimum span, adjust pole tip width and the pole root width of the N pole magnetic pole of rotor claw pole, and the pole tip width of the S pole magnetic pole of rotor claw pole and pole root width.
2. optimum design method of rotor claw pole of automobile generator according to claim 1, is characterized in that: described b
1, b
2, b
3and b
4optimum span calculate acquisition as follows:
A, b is set
1>b
3, b
2>b
4and b
1+ b
4=b
2+ b
3, or b is set
3>b
1, b
4>b
2and b
1+ b
4=b
2+ b
3;
B, by motor modeling and simulating software modeling emulation, adjustment b
1, b
2, b
3and b
4, make the optimal value T of cogging torque
cogat (0.95T
cog0, 1.05T
cog0) the interior change of scope, and the optimal value η of electric efficiency is at (0.99 η
0, 1.01 η
0) the interior change of scope, obtain b
1, b
2, b
3and b
4span: b
1∈ (b
1n, b
1m), b
2∈ (b
2n, b
2m), b
3∈ (b
3n, b
3m) and b
4∈ (b
4n, b
4m);
C, at b
1∈ (b
1n, b
1m), b
2∈ (b
2n, b
2m), b
3∈ (b
3n, b
3m) and b
4∈ (b
4n, b
4m) scope in adjustment b
1, b
2, b
3, b
4, make T
cog<T
cog0and air-gap flux meets
wherein φ
1for b
1, b
2, b
3and b
4initial air-gap flux before adjustment, φ
2for b
1, b
2, b
3and b
4optimization air-gap flux after adjustment, b after order adjustment
1, b
2, b
3and b
4be respectively b
1', b
2', b
3' and b
4', obtain b
1', b
2', b
3' and b
4' span: b
1' ∈ (b
1n', b
1m'), b
2' ∈ (b
2n', b
2m'), b
3' ∈ (b
3n', b
3m') and b
4' ∈ (b
4n', b
4m');
D, at b
1∈ (b
1n, b
1m), b
2∈ (b
2n, b
2m), b
3∈ (b
3n, b
3m) and b
4∈ (b
4n, b
4m) scope in adjustment b
1, b
2, b
3and b
4, make η > η
0, b after order adjustment
1, b
2, b
3and b
4be respectively b
1' ', b
2' ', b
3' ' and b
4' ', obtains b
1' ', b
2' ', b
3' ', b
4' ' span: b
1' ' ∈ (b
1n' ', b
1m' '), b
2' ' ∈ (b
2n' ', b
2m' '), b
3' ' ∈ (b
3n' ', b
3m' ') and b
4' ' ∈ (b
4n' ', b
4m' ');
E, make b
1' ' ', b
2' ' ', b
3' ' ' and b
4' ' ' is b
1, b
2, b
3and b
4optimal value, obtain b
1' ' ', b
2' ' ', b
3' ' ' and b
4the span of ' ' ' is: b ' ' '
1∈ (b '
1n, b '
1m) ∩ (b "
1n, b "
1m), b ' ' '
2∈ (b '
2n, b '
2m) ∩ (b "
2n, b "
2m), b ' ' '
3∈ (b '
3n, b '
3m) ∩ (b "
3n, b "
3m) and b ' ' '
4∈ (b '
4n, b '
4m) ∩ (b "
4n, b "
4m);
Described b
1' ' ', b
2' ' ', b
3' ' ' and b
4the span of ' ' ' is and makes optimization electric efficiency η and optimize cogging torque T
cogsatisfy condition: η > η
0and T
cog<T
cog0b
1, b
2, b
3and b
4optimum span;
If f is b
1' ' ', b
2' ' ', b
3' ' ', b
4' ' ' is all empty set, then step b is adjusted to T
cogat ((0.95-0.01m) T
cog0, (1.05+0.01m) T
cog0) the interior change of scope, and efficiency eta is at ((0.99-0.01n) η
0, (1.01+0.01n) η
0) the interior change of scope, wherein m=1,2,3 ..., 10; N=1,2,3; M, n are combined.
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| CN103326520A (en) | 2013-09-25 |
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