高速无刷直流电机案列～帮忙检查下不合理之处？
BRUSHLESS PERMANENT MAGNET DC MOTOR DESIGNFile: Setup1.res
GENERAL DATA
Rated Output Power (kW): 1.2
Rated Voltage (V): 220
Number of Poles: 4
Given Rated Speed (rpm): 60000
Frictional Loss (W): 8
Windage Loss (W): 6
Rotor Position: Inner
Type of Load: Constant Power
Type of Circuit: Y3
Lead Angle of Trigger in Elec. Degrees: 0
Trigger Pulse Width in Elec. Degrees: 120
One-Transistor Voltage Drop (V): 2
One-Diode Voltage Drop (V): 2
Operating Temperature (C): 75
Maximum Current for CCC (A): 0
Minimum Current for CCC (A): 0
STATOR DATA
Number of Stator Slots: 12
Outer Diameter of Stator (mm): 48
Inner Diameter of Stator (mm): 28
Type of Stator Slot: 2
Stator Slot
hs0 (mm): 0.5
hs1 (mm): 0.8
hs2 (mm): 2.5
bs0 (mm): 1.8
bs1 (mm): 4.56026
bs2 (mm): 5.90001
Top Tooth Width (mm): 3.5
Bottom Tooth Width (mm): 3.5
Skew Width (Number of Slots) 1
Length of Stator Core (mm): 45
Stacking Factor of Stator Core: 0.95
Type of Steel: DW540_50
Slot Insulation Thickness (mm): 0.3
Layer Insulation Thickness (mm): 0.3
End Length Adjustment (mm): 0
Number of Parallel Branches: 1
Number of Conductors per Slot: 22
Type of Coils: 21
Average Coil Pitch: 1
Number of Wires per Conductor: 2
Wire Diameter (mm): 0.541
Wire Wrap Thickness (mm): 0
Slot Area (mm^2): 30.1893
Net Slot Area (mm^2): 18.2868
Limited Slot Fill Factor (%): 75
Stator Slot Fill Factor (%): 70.4222
Coil Half-Turn Length (mm): 52.3194
ROTOR DATA
Minimum Air Gap (mm): 1
Inner Diameter (mm): 8
Length of Rotor (mm): 45
Stacking Factor of Iron Core: 0.95
Type of Steel: DW540_50
Polar Arc Radius (mm): 13
Mechanical Pole Embrace: 0.7
Electrical Pole Embrace: 0.696949
Max. Thickness of Magnet (mm): 2
Width of Magnet (mm): 13.1947
Type of Magnet: NdFe35
Type of Rotor: 1
Magnetic Shaft: No
PERMANENT MAGNET DATA
Residual Flux Density (Tesla): 1.23
Coercive Force (kA/m): 890
Maximum Energy Density (kJ/m^3): 273.675
Relative Recoil Permeability: 1.09981
Demagnetized Flux Density (Tesla): 7.50732e-005
Recoil Residual Flux Density (Tesla): 1.23
Recoil Coercive Force (kA/m): 890
MATERIAL CONSUMPTION
Armature Copper Density (kg/m^3): 8900
Permanent Magnet Density (kg/m^3): 7400
Armature Core Steel Density (kg/m^3): 7750
Rotor Core Steel Density (kg/m^3): 7750
Armature Copper Weight (kg): 0.056516
Permanent Magnet Weight (kg): 0.0351507
Armature Core Steel Weight (kg): 0.275497
Rotor Core Steel Weight (kg): 0.109289
Total Net Weight (kg): 0.476453
Armature Core Steel Consumption (kg): 0.699111
Rotor Core Steel Consumption (kg): 0.162633
STEADY STATE PARAMETERS
Stator Winding Factor: 0.5
D-Axis Reactive Inductance Lad (H): 5.12912e-005
Q-Axis Reactive Inductance Laq (H): 5.12912e-005
D-Axis Inductance L1+Lad(H): 9.1299e-005
Q-Axis Inductance L1+Laq(H): 9.1299e-005
Armature Leakage Inductance L1 (H): 4.00078e-005
Zero-Sequence Inductance L0 (H): 0.000130474
Armature Phase Resistance R1 (ohm): 0.217316
Armature Phase Resistance at 20C (ohm): 0.17876
D-Axis Time Constant (s): 0.000236022
Q-Axis Time Constant (s): 0.000236022
Ideal Back-EMF Constant KE (Vs/rad): 0.033842
Start Torque Constant KT (Nm/A): 0.0183314
Rated Torque Constant KT (Nm/A): 0.0287419
NO-LOAD MAGNETIC DATA
Stator-Teeth Flux Density (Tesla): 1.58087
Stator-Yoke Flux Density (Tesla): 1.32501
Rotor-Yoke Flux Density (Tesla): 0.801317
Air-Gap Flux Density (Tesla): 0.665767
Magnet Flux Density (Tesla): 0.807713
Stator-Teeth By-Pass Factor: 0.00266866
Stator-Yoke By-Pass Factor: 1.61284e-005
Rotor-Yoke By-Pass Factor: 8.60624e-006
Stator-Teeth Ampere Turns (A.T): 8.84341
Stator-Yoke Ampere Turns (A.T): 3.0444
Rotor-Yoke Ampere Turns (A.T): 0.501011
Air-Gap Ampere Turns (A.T): 598.607
Magnet Ampere Turns (A.T): -611.115
Armature Reactive Ampere Turns
at Start Operation (A.T): 3309
Leakage-Flux Factor: 1
Correction Factor for Magnetic
Circuit Length of Stator Yoke: 0.556164
Correction Factor for Magnetic
Circuit Length of Rotor Yoke: 0.81639
No-Load Speed (rpm): 61439
Cogging Torque (N.m): 6.57424e-014
FULL-LOAD DATA
Average Input Current (A): 6.96522
Root-Mean-Square Armature Current (A): 4.82152
Armature Thermal Load (A^2/mm^3): 151.758
Specific Electric Loading (A/mm): 14.4704
Armature Current Density (A/mm^2): 10.4875
Frictional and Windage Loss (W): 13.097
Iron-Core Loss (W): 280.494
Armature Copper Loss (W): 15.1559
Transistor Loss (W): 23.1925
Diode Loss (W): 0.43051
Total Loss (W): 332.369
Output Power (W): 1199.98
Input Power (W): 1532.35
Efficiency (%): 78.3098
Rated Speed (rpm): 57864.1
Rated Torque (N.m): 0.198032
Locked-Rotor Torque (N.m): 9.09444
Locked-Rotor Current (A): 496.182
WINDING ARRANGEMENT
The 3-phase, 2-layer winding can be arranged in 6 slots as below:
AZBXCY
Angle per slot (elec. degrees): 60
Phase-A axis (elec. degrees): 30
First slot center (elec. degrees): 0
TRANSIENT FEA INPUT DATA
For Armature Winding:
Number of Turns: 44
Parallel Branches: 1
Terminal Resistance (ohm): 0.217316
End Leakage Inductance (H): 5.25685e-007
2D Equivalent Value:
Equivalent Model Depth (mm): 45
Equivalent Stator Stacking Factor: 0.95
Equivalent Rotor Stacking Factor: 0.95
Equivalent Br (Tesla): 1.23
Equivalent Hc (kA/m): 890
Estimated Rotor Moment of Inertia (kg m^2): 1.57471e-005 请高手帮忙解决一下问题：
1.效率太低了，有没有办法让效率达到0.85以上？
2。铁耗太大了，有没有方法让其减少一点？
3.我这样设计合不合理？
迫切需要高手指点，一个人搞太闷了！谢谢！！ 有没有人回答啊？快快， 唉 ，没人关注啊 ？ 你设计方案效率不能提高，额定输出1200W,转速高达60,000,电流密度偏高了，效率如何提升？
除非你使用液氮冷却，呵呵。
-----把电机外径放大优化定子转子槽型&内外径比或者叠厚加长 回复 5# powerwucun
电流密度的范围是4～15 A/mm^2 吧，我的才到10 ，
定子外径是不能在增加，厂家有规定，优化定子槽型倒是可以考虑，但是小弟不知道是从哪方面去优化，是增加面积，还是减少？或者其他什么办法啊？ 帮你顶一下吧 我也不会 回复 6# cxj
电流密度10已经是个很大的数值了，如果你的电机不是短时工作的话，电机肯定要烧。 连续工作的电流密度一般在4~7啊。你要提高效率现加大线径看看，你可以加大槽面积，你齿宽3.5，我觉得没必要那么宽。这个电机这么小怎么嵌线啊？ 回复 8# zxhua_407
恩。好的，我试试看，谢谢你咯 回复 7# jackyancs72
谢谢～～希望一直顶下去 我也是初学者，象这样的帖子大家应多讨论一下，向高手们学习 Stator-Teeth Flux Density (Tesla): 1.58087
Stator-Yoke Flux Density (Tesla): 1.32501
Rotor-Yoke Flux Density (Tesla): 0.801317
---定子内径比例不对，可以缩小，增大定子槽型面积，或者定子齿和轭部宽度做优选（RMXPRT有参数化扫描功能的） 电流密度选择是看电机温升要求和冷却条件估算选择的，然后根据效率、成本综合考虑，----最直接那人家现成的电机做仿真对比计算，再自己优化设计 回复 12# powerwucun
恩，还有像电机的转速除了这个公式之外（n=60f/p），还与什么有关？有哪些参数影响到效率和转速？ 回复 13# powerwucun
我现在还没到优化设计这一块，有没有相关的一些例子可以供我参考呢? 回复 13# powerwucun
可以加你QQ吗?小弟向您学习啊！
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