BLDC电机导入2D后额定转速偏大

小菜菜菜 · 发表于 2020-7-11 09:42

BLDC电机在RMxprt里额定转速60000左右，但是导入2D后可以到70000~80000转，想请问一下各位大佬是不是电磁设计上有问题？该从什么地方改进？
  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): 0.000150146
Recoil Residual Flux Density (Tesla): 1.23
Recoil Coercive Force (kA/m): 890

   USER DEFINED DATA

Fractions: 1

   MATERIAL CONSUMPTION

Armature Copper Density (kg/m^3):    8900
Permanent Magnet Density (kg/m^3):    7400
Armature Core Steel Density (kg/m^3):    7650
Rotor Core Steel Density (kg/m^3):    7650

Armature Copper Weight (kg):    0.0635678
Permanent Magnet Weight (kg):    0.0169058
Armature Core Steel Weight (kg):    0.166756
Rotor Core Steel Weight (kg):    0.0272334
Total Net Weight (kg):    0.274464

Armature Core Steel Consumption (kg):    0.423841
Rotor Core Steel Consumption (kg):    0.0665645

   STEADY STATE PARAMETERS

Stator Winding Factor: 0.866025
D-Axis Reactive Inductance Lad (H): 0.000100143
Q-Axis Reactive Inductance Laq (H): 0.000100143
D-Axis Inductance L1+Lad(H): 0.000401252
Q-Axis Inductance L1+Laq(H): 0.000401252
Armature Leakage Inductance L1 (H): 0.00030111
  Slot Leakage Inductance Ls1 (H): 0.000249204
  End Leakage Inductance Le1 (H): 9.74574e-06
  Harmonic Leakage Inductance Ld1 (H): 4.21596e-05
Zero-Sequence Inductance L0 (H): 5.44387e-05
Armature Phase Resistance R1 (ohm): 0.121067
Armature Phase Resistance at 20C (ohm): 0.0995875
D-Axis Time Constant (s): 0.000827166
Q-Axis Time Constant (s): 0.000827166

Ideal Back-EMF Constant KE (Vs/rad): 0.0326766
Start Torque Constant KT (Nm/A): 0.00500995
Rated Torque Constant KT (Nm/A): 0.0456674

   NO-LOAD MAGNETIC DATA

Stator-Teeth Flux Density (Tesla): 1.12204
Stator-Yoke Flux Density (Tesla): 1.10971
Rotor-Yoke Flux Density (Tesla): 1.45319
Air-Gap Flux Density (Tesla): 0.622331
Magnet Flux Density (Tesla): 0.813344

Stator-Teeth By-Pass Factor: 0.00115597
Stator-Yoke By-Pass Factor: 5.18496e-05
Rotor-Yoke By-Pass Factor: 4.57661e-05

Stator-Teeth Ampere Turns (A.T): 6.34214
Stator-Yoke Ampere Turns (A.T): 13.0085
Rotor-Yoke Ampere Turns (A.T): 1.11517
Air-Gap Ampere Turns (A.T): 522.014
Magnet Ampere Turns (A.T): -542.67

Armature Reactive Ampere Turns
  at Start Operation (A.T): 17288.6
Leakage-Flux Factor: 1
Correction Factor for Magnetic
  Circuit Length of Stator Yoke: 0.86681
Correction Factor for Magnetic
  Circuit Length of Rotor Yoke: 0.201023

No-Load Speed (rpm): 90197.1
Cogging Torque (N.m): 0.00270121

   FULL-LOAD DATA

Average Input Current (A): 10.4564
Root-Mean-Square Armature Current (A): 12.8069
Armature Thermal Load (A^2/mm^3): 1078.92
Specific Electric Loading (A/mm): 55.0335
Armature Current Density (A/mm^2): 19.6049
Frictional and Windage Loss (W): 10.3675
Iron-Core Loss (W): 4.07008
Armature Copper Loss (W): 59.5709
Transistor Loss (W): 54.43
Diode Loss (W): 12.821
Total Loss (W): 141.26
Output Power (W): 3100.23
Input Power (W): 3241.49
Efficiency (%): 95.6421

Rated Speed (rpm): 62205.1
Rated Torque (N.m): 0.475926

Locked-Rotor Torque (N.m): 6.31922
Locked-Rotor Current (A): 1261.65

   WINDING ARRANGEMENT

The 3-phase, 2-layer winding can be arranged in 3 slots as below:

ABC

Angle per slot (elec. degrees): 120
Phase-A axis (elec. degrees): 60
First slot center (elec. degrees): 0

   TRANSIENT FEA INPUT DATA

For Armature Winding:
  Number of Turns: 54
  Parallel Branches: 1
  Terminal Resistance (ohm): 0.121067
  End Leakage Inductance (H): 9.74574e-06
2D Equivalent Value:
  Equivalent Model Depth (mm): 20
  Equivalent Stator Stacking Factor: 0.95
  Equivalent Rotor Stacking Factor: 0.95
  Equivalent Br (Tesla): 1.23
  Equivalent Hc (kA/m): 890