9槽6极永磁无刷直流电机，为什么仿真的结果和实物测量差很多？
本帖最后由 13328037063 于 2023-4-11 17:50 编辑9槽6极DC24V 输入功率50W 输出18W5000rpm φ0.6 N35星接 效率26%左右 电流1点几A ，转子是粘结磁环+注塑体+陶瓷转轴的结构 ，为什么仿真结果出来电流变成十几A，效率也只有十几 本帖最后由 13328037063 于 2023-4-11 17:51 编辑
往前移动到 8000rpm的位置，输出功率 50W，效率明显高。 你为什么选择后点呢？ 电机堵转需求？ 还是？ fullingmotor 发表于 2023-4-11 10:50
往前移动到 8000rpm的位置，输出功率 50W，效率明显高。 你为什么选择后点呢？ 电机堵转需求？ 还是？
因为我看仿真结果里的Full-Load Operation里的Rated Speed是1767.2 所以我才选了这个点 那说明仿真设置有问题 lizhen2979371 发表于 2023-4-11 11:22
那说明仿真设置有问题
楼上有我的仿真数据图片，能帮我看一下吗 建议用2D仿真吧 RM很多设置不能自由设置 本帖最后由 春哥学电机1 于 2023-4-12 08:30 编辑
计算结果发出来看看呢 春哥学电机1 发表于 2023-4-12 08:24
计算结果发出来看看呢
是这个吗？ BRUSHLESS PERMANENT MAGNET DC MOTOR DESIGN
File: 24V.res
GENERAL DATA
Rated Output Power (kW): 0.018
Rated Voltage (V): 24
Number of Poles: 6
Given Rated Speed (rpm): 5000
Frictional Loss (W): 0.2925
Windage Loss (W): 0.0675
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): 0.7
One-Diode Voltage Drop (V): 0.7
Operating Temperature (C): 75
Maximum Current for CCC (A): 0
Minimum Current for CCC (A): 0
STATOR DATA
Number of Stator Slots: 9
Outer Diameter of Stator (mm): 51.7
Inner Diameter of Stator (mm): 27
Type of Stator Slot: Edited
Symmetric Slot
Type Info (mm)
1 End Width: 2.08958
Arc Offset from Slot Center: 0
2 Height: 0.539266
Parallel Slot Width: 0
8 Radius: 0.485
2 Height: 0.0615876
End Width: 7.26735
2 Height: 0.0073853
End Width: 7.41174
2 Height: 8.31638
End Width: 13.463
1 End Width: 0
Arc Offset from Slot Center: 0
Top Tooth Width (mm): 2.98234
Bottom Tooth Width (mm): 2.98234
Skew Width (Number of Slots) 0
Length of Stator Core (mm): 18
Stacking Factor of Stator Core: 0.97
Type of Steel: 50W800(CRP060)
Designed Wedge Thickness (mm): 0
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: 70
Type of Coils: 22
Average Coil Pitch: 1
Number of Wires per Conductor: 1
Wire Diameter (mm): 0.6
Wire Wrap Thickness (mm): 0.07
Slot Area (mm^2): 89.4146
Net Slot Area (mm^2): 86.8011
Limited Slot Fill Factor (%): 75
Stator Slot Fill Factor (%): 36.2011
Coil Half-Turn Length (mm): 32.6247
ROTOR DATA
Minimum Air Gap (mm): 2
Inner Diameter (mm): 5
Length of Rotor (mm): 27
Stacking Factor of Iron Core: 0.97
Type of Steel: 50W800(CRP060)
Polar Arc Radius (mm): 11.5
Mechanical Pole Embrace: 1
Electrical Pole Embrace: 0.746969
Max. Thickness of Magnet (mm): 5.6
Width of Magnet (mm): 9.11062
Type of Magnet: FB19R(CRP060)
Type of Rotor: 1
Magnetic Shaft: Yes
PERMANENT MAGNET DATA
Residual Flux Density (Tesla): 0.285
Coercive Force (kA/m): 200.217
Maximum Energy Density (kJ/m^3): 15.5176
Relative Recoil Permeability: 1
Demagnetized Flux Density (Tesla): 0.144483
Recoil Residual Flux Density (Tesla): 0.279348
Recoil Coercive Force (kA/m): 222.305
MATERIAL CONSUMPTION
Armature Copper Density (kg/m^3): 8900
Permanent Magnet Density (kg/m^3): 7800
Armature Core Steel Density (kg/m^3): 7850
Rotor Core Steel Density (kg/m^3): 7850
Armature Copper Weight (kg): 0.0517213
Permanent Magnet Weight (kg): 0.0644682
Armature Core Steel Weight (kg): 0.0989575
Rotor Core Steel Weight (kg): 0.0184465
Total Net Weight (kg): 0.233593
Armature Core Steel Consumption (kg): 0.38652
Rotor Core Steel Consumption (kg): 0.0353686
STEADY STATE PARAMETERS
Stator Winding Factor: 0.866025
D-Axis Reactive Inductance Lad (H): 3.47455e-005
Q-Axis Reactive Inductance Laq (H): 3.47455e-005
D-Axis Inductance L1+Lad(H): 0.000248215
Q-Axis Inductance L1+Laq(H): 0.000248215
Armature Leakage Inductance L1 (H): 0.00021347
Zero-Sequence Inductance L0 (H): 3.38609e-005
Armature Phase Resistance R1 (ohm): 0.525815
Armature Phase Resistance at 20C (ohm): 0.432525
D-Axis Time Constant (s): 6.60794e-005
Q-Axis Time Constant (s): 6.60794e-005
Ideal Back-EMF Constant KE (Vs/rad): 0.0159599
Start Torque Constant KT (Nm/A): 0.0159641
Rated Torque Constant KT (Nm/A): 0.0165393
NO-LOAD MAGNETIC DATA
Stator-Teeth Flux Density (Tesla): 0.617236
Stator-Yoke Flux Density (Tesla): 0.417179
Rotor-Yoke Flux Density (Tesla): 0.217603
Air-Gap Flux Density (Tesla): 0.16681
Magnet Flux Density (Tesla): 0.210909
Stator-Teeth By-Pass Factor: 0.000780242
Stator-Yoke By-Pass Factor: 1.07497e-005
Rotor-Yoke By-Pass Factor: 1.73299e-005
Stator-Teeth Ampere Turns (A.T): 1.2339
Stator-Yoke Ampere Turns (A.T): 1.34889
Rotor-Yoke Ampere Turns (A.T): 0.200871
Air-Gap Ampere Turns (A.T): 302.377
Magnet Ampere Turns (A.T): -304.996
Armature Reactive Ampere Turns
at Start Operation (A.T): 391.309
Leakage-Flux Factor: 1
Correction Factor for Magnetic
Circuit Length of Stator Yoke: 0.940453
Correction Factor for Magnetic
Circuit Length of Rotor Yoke: 0.944005
No-Load Speed (rpm): 13622.3
Cogging Torque (N.m): 0.0025809
FULL-LOAD DATA
Average Input Current (A): 19.4692
Root-Mean-Square Armature Current (A): 16.3368
Armature Thermal Load (A^2/mm^3): 7010.79
Specific Electric Loading (A/mm): 121.337
Armature Current Density (A/mm^2): 57.7795
Frictional and Windage Loss (W): 0.031441
Iron-Core Loss (W): 0.0872656
Armature Copper Loss (W): 421.004
Transistor Loss (W): 27.6705
Diode Loss (W): 0.4227
Total Loss (W): 449.216
Output Power (W): 18.0438
Input Power (W): 467.26
Efficiency (%): 3.86162
Rated Speed (rpm): 536.031
Rated Torque (N.m): 0.321447
Locked-Rotor Torque (N.m): 0.342185
Locked-Rotor Current (A): 21.4696
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: 105
Parallel Branches: 1
Terminal Resistance (ohm): 0.525815
End Leakage Inductance (H): 6.20537e-006
2D Equivalent Value:
Equivalent Model Depth (mm): 18
Equivalent Stator Stacking Factor: 0.97
Equivalent Rotor Stacking Factor: 1.455
Equivalent Br (Tesla): 0.419022
Equivalent Hc (kA/m): 222.305
Estimated Rotor Moment of Inertia (kg m^2): 5.78588e-006
5000rpm的是额定转速，曲线那里拖到0.034N.m左右估摸着5000rpm吧，要观察0.27N.m是为了干啥 另外这个计算的额定转速怎么这么低？winding那里改成whole__呢 输出功率是18W，我看你设置的是50W 用Maxwell 2D仿真 RM仿真差距确实有点大。 一个暴汗的R 发表于 2023-4-18 15:50
另外这个计算的额定转速怎么这么低？winding那里改成whole__呢
Half-Coiled改成Whole-Coiled计算结果没有改变 Soliare 发表于 2023-4-19 00:31
输出功率是18W，我看你设置的是50W
我后面改掉了结果还是差挺多的 设置合适的结构参数，就会有靠谱的结果给你。 首先不要相信rm路算结果
要用2D仿真，2D仿真注意你硅钢片材料的BH曲线，还有转子磁环的充磁方式，因为轴不导磁，所以你的磁环有点正弦充磁的
然后呢，先校核仿真的反电势和实测反电势，对上后
再校核负载
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