用Ansoft 做的外转子永磁同步电机空载电流很大哦

yinson

用Ansoft Maxwell 12做的一个外转子的永磁同步电机，空载电流(No-Load Line Current )有36A哦，额定电流也就100A左右哦，找了一下原因，但我是新手，不知道是什么问题！希望高手指点一下！十分感谢！
把求解结果和工程文件都放上来了……

ADJUSTABLE-SPEED PERMANENT MAGNET SYNCHRONOUS MOTOR DESIGN

     GENERAL DATA
Rated Output Power (kW): 57
Rated Voltage (V): 342
Number of Poles: 10
Frequency (Hz): 225
Frictional Loss (W): 10
Windage Loss (W): 0
Rotor Position: Outer
Type of Circuit: Y3
Type of Source: Sine
Domain: Frequency
Operating Temperature (C): 75

     STATOR DATA
Number of Stator Slots: 36
Outer Diameter of Stator (mm):   314
Inner Diameter of Stator (mm):   180
Type of Stator Slot: 2
Dimension of Stator Slot
            hs0 (mm):   1
            hs1 (mm):   1.47
            hs2 (mm):   30
            bs0 (mm):   3
            bs1 (mm):   10.97
            bs2 (mm):   5.734
Top Tooth Width (mm):   16.0068
Bottom Tooth Width (mm):   15.9936
Skew Width (Number of Slots): 0
Length of Stator Core (mm):   90
Stacking Factor of Stator Core: 0.97
Type of Steel: DW465_50
Slot Insulation Thickness (mm):   0.3
Layer Insulation Thickness (mm):   0.3
End Length Adjustment (mm):   10
Number of Parallel Branches: 2
Number of Conductors per Slot: 12
Type of Coils: 21
Average Coil Pitch: 3
Number of Wires per Conductor: 13
Wire Diameter (mm):   0.973396
Wire Wrap Thickness (mm):   0.08
Net Slot Area (mm^2): 233.862
Limited Slot Fill Factor (%): 90
Stator Slot Fill Factor (%): 74.0199
Coil Half-Turn Length (mm):   202.582

     ROTOR DATA
Minimum Air Gap (mm):   2
Outer Diameter (mm):   390
Length of Rotor (mm):   100
Stacking Factor of Iron Core: 1
Type of Steel: DW465_50
Polar Arc Radius (mm):   159
Mechanical Pole Embrace: 0.83
Electrical Pole Embrace: 0.829314
Max. Thickness of Magnet (mm):   5
Width of Magnet (mm):   81.9827
Type of Magnet: 42sh
Type of Rotor: 1
Magnetic Shaft: No

     PERMANENT MAGNET DATA
Residual Flux Density (Tesla): 1.29
Coercive Force (kA/m): 955
Maximum Energy Density (kJ/m^3): 318
Relative Recoil Permeability: 1.04081
Demagnetized Flux Density (Tesla): 0.207164
Recoil Residual Flux Density (Tesla): 1.26951
Recoil Coercive Force (kA/m): 970.665
     MATERIAL CONSUMPTION
Armature Wire 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):   7.53507
Permanent Magnet Weight (kg):   3.2847
Armature Core Steel Weight (kg):   28.2514
Rotor Core Steel Weight (kg):   26.9213
Total Net Weight (kg):   65.9925
Armature Core Steel Consumption (kg):   67.5497
Rotor Core Steel Consumption (kg):   26.9213

     STEADY STATE PARAMETERS
Stator Winding Factor: 0.923563
D-Axis Reactive Reactance Xad (ohm): 0.330166
Q-Axis Reactive Reactance Xaq (ohm): 0.330166
D-Axis Reactance X1+Xad (ohm): 0.485164
Q-Axis Reactance X1+Xaq (ohm): 0.485164
Armature Leakage Reactance X1 (ohm): 0.154997
Zero-Sequence Reactance X0 (ohm): 0.115141
Armature Phase Resistance R1 (ohm): 0.0163588

     NO-LOAD MAGNETIC DATA
Stator-Teeth Flux Density (Tesla): 1.71395
Stator-Yoke Flux Density (Tesla): 1.20675
Rotor-Yoke Flux Density (Tesla): 1.1085
Air-Gap Flux Density (Tesla): 0.893717
Magnet Flux Density (Tesla): 0.838309
Stator-Teeth By-Pass Factor: 0.00226069
Stator-Yoke By-Pass Factor: 6.25279e-006
Rotor-Yoke By-Pass Factor: 2.84808e-008
Stator-Teeth Ampere Turns (A.T): 175.643
Stator-Yoke Ampere Turns (A.T): 3.56083
Rotor-Yoke Ampere Turns (A.T): 5.2173
Air-Gap Ampere Turns (A.T): 1464.44
Magnet Ampere Turns (A.T): -1648.48
Leakage-Flux Factor: 1
Correction Factor for Magnetic
  Circuit Length of Stator Yoke: 0.550761
Correction Factor for Magnetic
  Circuit Length of Rotor Yoke: 0.629044
No-Load Line Current (A): 36.0286
No-Load Input Power (W): 692.009
Cogging Torque (N.m): 0.205666

     FULL-LOAD DATA
Maximum Line Induced Voltage (V): 530.706
Root-Mean-Square Line Current (A): 101.253
Root-Mean-Square Phase Current (A): 101.253
Armature Thermal Load (A^2/mm^3): 116.022
Specific Electric Loading (A/mm): 22.1705
Armature Current Density (A/mm^2): 5.23319
Frictional and Windage Loss (W): 10
Iron-Core Loss (W): 617.245
Armature Copper Loss (W): 503.132
Total Loss (W): 1130.38
Output Power (W): 57013.3
Input Power (W): 58143.7
Efficiency (%): 98.0559
Synchronous Speed (rpm): 2700
Rated Torque (N.m): 201.643
Torque Angle (degree): 12.4995
Maximum Output Power (W): 258220
Torque Constant KT (Nm/A): 0

     WINDING ARRANGEMENT
The 3-phase, 2-layer winding can be arranged in 36 slots as below:
AAZBXCYYAZBXCCYAZBXXCYAZBBXCYAZZBXCY

Angle per slot (elec. degrees): 50
Phase-A axis (elec. degrees): 100
First slot center (elec. degrees): 0

     TRANSIENT FEA INPUT DATA
For Armature Winding:
  Number of Turns: 72
  Parallel Branches: 2
  Terminal Resistance (ohm): 0.0163588
  End Leakage Inductance (H): 1.36796e-005
2D Equivalent Value:
  Equivalent Model Depth (mm): 90
  Equivalent Stator Stacking Factor: 0.97
  Equivalent Rotor Stacking Factor: 1.11111
  Equivalent Br (Tesla): 1.41057
  Equivalent Hc (kA/m): 970.665
Estimated Rotor Inertial Moment (kg m^2): 1.68377

yinson

怎么没人支持一下呀……莫非大家没遇到过类似情况

hxmotor

增大有效材料用量吧，尤其是永磁体用量。
       另外，定子不斜槽吗？不需要考虑齿槽转矩吗？
        定、转子长度不一样，是否就是这样？   
       还有，请提供控制该电机所用的变频器的参数。该电机是长期工作在弱磁状态吗？

lvwei1020

空载电流是空载损耗决定的，空载损耗设置过大，电流也就大了

yinson

回复 4# lvwei1020


    损耗全部设为0，空载电流也挺大的，也是30A左右……

yinson

回复 3# hxmotor

先说明一下，这个电机是厂家设计和加工的，现在已经拿回来了，用变频器驱动调试过，1000rpm左右的空载电流很小，大概就1~2A。现在我是想对电机建模进行仿真分析。

    不用斜槽哦，而且我用论坛里面介绍的方法计算到的齿槽转矩也就1Nm左右
  定转子长度不一样，应该不是问题，不过我会试试调一样再算一次

现在只是用ansoft做仿真，用的是电压正弦输入，暂时还没有考虑变频器哦！
另外请教一下，在ansoft可以模拟“变频器驱动永磁同步电机”吗？

十分感谢指导！

lvwei1020

也就是软件算出来是30几的电流吧？关键是看你测试的时候是那里的电流了。实际母线电流应该只有2A的样子，相电流30几吧？

hxmotor

回复 6# yinson


     你好，ansoft rmxprt 计算调试永磁同步电机时，空载电流的参考价值不大，但空载电压很重要，故希望和你讨论一下，请问：
     1.该电机的磁钢是否与rmxprt中输入的磁钢型号或磁钢性能相同？
     2.定子电阻或定子匝数是否与rmxprt中输入相同？
     3.1000rpm时，空载电压数值。
     4.是否有2600rpm时的空载和负载的电压、电流。
     5.变频器的控制方式，Id=0或其它？

1977zxb1977

ansoft软件的路计算本身就很不好，不要相信他，一定要用其他手段验证。不然你会死得很惨的。

hxmotor

回复 9# 1977zxb1977


     请教下，请问您在计算PMSM，一般用什么软件啊？

Kyd70599

外转子的有多绕组的么？

光明骑士

我也算过几个方案，空载电流有些也比较大，一直没找到关键原因。是否软件本身问题？还请有人能给个合理说明

syzh1998

软件破解有问题，没有产考价值，8楼说的对！

syzh1998

你设计的反电势过高，额定电压太低，电机运行在弱磁扩速状态可能也是造成空载电流大的原因！

数数然也

pmsm外转子电机仿真求交流，毕业论文中涉及

数数然也

外转子永磁同步电机怎么在rmxprt上设置啊

wubin1333333

下载下来先看看还不清楚