新人求教永磁直流电机设计方法

PKU落榜生

如题，楼主是大三学生，上个学期老师让我学习电机设计的内容，给了我一种电机的设计指标，我最开始还以为是要给我完整的各种设计参数我只需要仿真，结果现在才发现是要我自己设计并仿真……我滴妈这周快学吐了……

言归正传，最近勉强能用RMxprt得出现实中能实现的结果了（不像之前得出输出功率-3kW，效率116%），但距离老师给的额定指标还有距离（额定转速下负载功率是额定功率两倍），现在有点不知道该怎么改进，求各位大佬指点一二。

下面是额定数值：
额定功率(W)        10000
额定电压(V)        800
额定转速(rpm)        4800
额定电流(A)        14
电机极数           16

下面是目前我设计的参数用RMxprt得出的结果：
         BRUSHLESS PERMANENT MAGNET DC MOTOR DESIGN

                      File: Setup1.res


     GENERAL DATA

Rated Output Power (kW):        10
Rated Voltage (V):        800
Number of Poles:        16
Given Rated Speed (rpm):        4800
Frictional Loss (W):        0
Windage Loss (W):        0
Rotor Position:        Outer
Type of Load:        Constant Speed
Type of Circuit:        L3
Lead Angle of Trigger in Elec. Degrees:        0
Trigger Pulse Width in Elec. Degrees:        120
One-Transistor Voltage Drop (V):        0
One-Diode Voltage Drop (V):        0
Operating Temperature (C):        75
Maximum Current for CCC (A):        0
Minimum Current for CCC (A):        0


     STATOR DATA

Number of Stator Slots:        18
Outer Diameter of Stator (mm):          148.72
Inner Diameter of Stator (mm):          110.68

Type of Stator Slot:        3
Stator Slot       
            hs0 (mm):          0.78
            hs1 (mm):          1.56
            hs2 (mm):          13.27
            bs0 (mm):          7.03
            bs1 (mm):          16.39
            bs2 (mm):          15.22
            rs (mm):          0.78

Top Tooth Width (mm):          8.84242
Bottom Tooth Width (mm):          5.38602
Skew Width (Number of Slots)        0

Length of Stator Core (mm):          29.74
Stacking Factor of Stator Core:        0.95
Type of Steel:        35W400
Designed Wedge Thickness (mm):          1.32259
Slot Insulation Thickness (mm):          0
Layer Insulation Thickness (mm):          0
End Length Adjustment (mm):          0
Number of Parallel Branches:        1
Number of Conductors per Slot:        100
Number of Layers:        1
Winding Type:        Whole Coiled
Average Coil Pitch:        1
Number of Wires per Conductor:        12
Wire Diameter (mm):          0.4
Wire Wrap Thickness (mm):          0
Slot Area (mm^2):        245.094
Net Slot Area (mm^2):        225.065
Limited Slot Fill Factor (%):        75
Stator Slot Fill Factor (%):        85.3087
Coil Half-Turn Length (mm):          48.6081


     ROTOR DATA

Minimum Air Gap (mm):          0.5
Outer Diameter (mm):          159.72
Length of Rotor (mm):          30.74
Stacking Factor of Iron Core:        0.95
Type of Steel:        35W400
Polar Arc Radius (mm):          74.86
Mechanical Pole Embrace:        0.7
Electrical Pole Embrace:        0.698937
Max. Thickness of Magnet (mm):          4
Width of Magnet (mm):          20.5135
Type of Magnet:        yunsheng38
Type of Rotor:        1
Magnetic Shaft:        Yes


     PERMANENT MAGNET DATA

Residual Flux Density (Tesla):        1.235
Coercive Force (kA/m):        899
Maximum Energy Density (kJ/m^3):        277.566
Relative Recoil Permeability:        1.09323
Demagnetized Flux Density (Tesla):        7.53784e-05
Recoil Residual Flux Density (Tesla):        1.235
Recoil Coercive Force (kA/m):        899

     MATERIAL CONSUMPTION

Armature Copper Density (kg/m^3):          8900
Permanent Magnet Density (kg/m^3):          7800
Armature Core Steel Density (kg/m^3):          7700
Rotor Core Steel Density (kg/m^3):          7700

Armature Copper Weight (kg):          1.17426
Permanent Magnet Weight (kg):          0.324218
Armature Core Steel Weight (kg):          0.726238
Rotor Core Steel Weight (kg):          0.112124
Total Net Weight (kg):          2.33684

Armature Core Steel Consumption (kg):          3.93306
Rotor Core Steel Consumption (kg):          1.88857


     STEADY STATE PARAMETERS

Stator Winding Factor:        0.945214
D-Axis Reactive Inductance Lad (H):        0.00168533
Q-Axis Reactive Inductance Laq (H):        0.00168533
D-Axis Inductance L1+Lad(H):        0.006156
Q-Axis Inductance L1+Laq(H):        0.006156
Armature Leakage Inductance L1 (H):        0.00447066
  Slot Leakage Inductance Ls1 (H):        0.00143921
  End Leakage Inductance Le1 (H):        0.000192684
  Harmonic Leakage Inductance Ld1 (H):        0.00283878
Zero-Sequence Inductance L0 (H):        0.00447066
Armature Phase Resistance R1 (ohm):        0.41969
Armature Phase Resistance at 20C (ohm):        0.345229
D-Axis Time Constant (s):        0.00401565
Q-Axis Time Constant (s):        0.00401565

Ideal Back-EMF Constant KE (Vs/rad):        0.689837
Start Torque Constant KT (Nm/A):        0.447433
Rated Torque Constant KT (Nm/A):        1.48037


     NO-LOAD MAGNETIC DATA

Stator-Teeth Flux Density (Tesla):        1.60919
Stator-Yoke Flux Density (Tesla):        0.0949539
Rotor-Yoke Flux Density (Tesla):        5.3493
Air-Gap Flux Density (Tesla):        0.497981
Magnet Flux Density (Tesla):        0.496216

Stator-Teeth By-Pass Factor:        0.00456525
Stator-Yoke By-Pass Factor:        9.5239e-06
Rotor-Yoke By-Pass Factor:        0.0114639

Stator-Teeth Ampere Turns (A.T):        36.882
Stator-Yoke Ampere Turns (A.T):        0.059955
Rotor-Yoke Ampere Turns (A.T):        1848.21
Air-Gap Ampere Turns (A.T):        266.406
Magnet Ampere Turns (A.T):        -2151.15

Armature Reactive Ampere Turns
  at Start Operation (A.T):        61328
Leakage-Flux Factor:        1
Correction Factor for Magnetic
  Circuit Length of Stator Yoke:        0.767021
Correction Factor for Magnetic
  Circuit Length of Rotor Yoke:        0.668515

No-Load Speed (rpm):        11168
Cogging Torque (N.m):        0.0850176


     FULL-LOAD DATA

Average Input Current (A):        28.925
Root-Mean-Square Armature Current (A):        35.8317
Armature Thermal Load (A^2/mm^3):        3280.18
Specific Electric Loading (A/mm):        138.045
Armature Current Density (A/mm^2):        23.7616
Frictional and Windage Loss (W):        0
Iron-Core Loss (W):        0.00431668
Armature Copper Loss (W):        1616.54
Transistor Loss (W):        0
Diode Loss (W):        0
Total Loss (W):        1616.54
Output Power (W):        21523.5
Input Power (W):        23140
Efficiency (%):        93.0141

Rated Speed (rpm):        4800
Rated Torque (N.m):        42.8196

Locked-Rotor Torque (N.m):        1276.98
Locked-Rotor Current (A):        2854.01


     WINDING ARRANGEMENT

The 3-phase, 1-layer winding can be arranged in 18 slots as below:

ABYBCZCAXAXYBYZCZX

PhaseA average coil pitch is:        1
PhaseB average coil pitch is:        3.33333
PhaseC average coil pitch is:        3.33333

Angle per slot (elec. degrees):        160
Phase-A axis (elec. degrees):        100
First slot center (elec. degrees):        0



     TRANSIENT FEA INPUT DATA

For Armature Winding:
  Number of Turns:        300
  Parallel Branches:        1
  Terminal Resistance (ohm):        0.41969
  End Leakage Inductance (H):        0.000192684
2D Equivalent Value:
  Equivalent Model Depth (mm):        29.74
  Equivalent Stator Stacking Factor:        0.95
  Equivalent Rotor Stacking Factor:        0.981944
  Equivalent Br (Tesla):        1.27653
  Equivalent Hc (kA/m):        899

lm651878751

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woshiwsm

你直接晒曲线图，好看一点