永磁无刷电机设计5

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SPEED是一款以磁路计算为主,有限元为辅的电机设计软件。常规的磁路法设计电机,主要是使用公式结合经验来做的,无法考虑控制电路也不能计算电机内的温度场,设计的精确性受经验的影响比较大。而SPEED软件是由很多有经验的工程师编写的,并经过许多著名的电机厂检验,同时还可以通过有限元对其进行验证。对于控制类电机,在其内部可以考虑很多种的控制方式。SPEED中还包含温度场分析。
SINEWAVE DRIVE Sinewave Drive and control PC-BDO lED SINEWAVE DRIVE and control 16-Sep-08 (C)SPEED Laboratory 2008 For use in designated meeting/class only. Please do not make unauthorized copies Slide 3 of 54 SINEWAVE DRIVE Sinewave drive PC-BDO lED Graph: Currcnt v3. Rotor poaition [Thaac11 Ideally, the current and emf are both sinusoidal uren:vS. Rotor rositi Good control performance pHase 1 Low torque ripple 90 bU Requires continuous position signal g000 Sensorless drives are possible -0.30 -0 -o 3 transistors conducting at any time Can employ salient-pole motors 0306191215182102402 Rotor osition elEC dEg*100 Field-weakening can extend the torque/speed curve Sinusoidal current waveform obtained from Can use halbach or ring magnets current-regulated PWm sinewave inverter Works with single-tooth coils and fractional slots/pole Classical synchronous-machine phasor diagram Controllers often use field-orientation or Dtc 16-Sep-08 (C)SPEED Laboratory 2008 For use in designated meeting/class only. Please do not make unauthorized copies Slide 4 of 54 SINEWAVE DRIVE Drive control: dq- and I-gamma controllers PC-BDC sPEED Phase Original controlled Inverter PM MOtor implementation rectifier Lajoie- Mazen, 1983 ▲▲44▲▲4 Encoder Current reference Current regulator A more modern field oriented concept, Vector Current With“ instantaneous PM Motor rotator regulator current regulators q Current regulator 16-Sep-08 (C)SPEED Laboratory 2008 For use in designated meeting/class only. Please do not make unauthorized copies Slides of 54 SINEWAVE DRIVE Current regulation and drive control PC-BDO lED CURRENT TORQUE ISP MOTOR 360° 180 Current control is required for torque contro Set-point current (current demand) comes from a higher level our outer oop"in the control system. The higher T level algorithms usually use speed and position feedback(or estimates) △i sp regulator PWM Inverter Motor Essential elements of a current regulator 16-Sep-08 (C)SPEED Laboratory 2008 For use in designated meeting/class only. Please do not make unauthorized copies Slide 6 of 54 SINEWAVE DRIVE Static design: forced current PC-BDO lED Graph: Current vs Rotor position [Phase] Current vs. Rotor position 1.2 三 可-05 0m50$1215121024270303336 Rotor position elec deg 100l E M.F. vs Rotor position 40 若 4.①D 0m30500901.20 15010210240270303.303.80 Rotor position [elec deg" 100 Torque vs Rotor position 100 三 20 D.0 0.30 0.60 O S 1.20 1.50 2 2.402.70 30 3.5 Rotor position [elec deg"] 16-Sep-08 (C)SPEED Laboratory 2008 For use in designated meeting/class only. Please do not make unauthorized copies Slide 7 of 54 SINEWAVE DRIVE Dynamic design simulation PC-BDO lED [Graph: Current vs Rotor position[Phase] Current vs. Rotor position 0.60 00 -00 120 CruAiwAyAAWwww//. 00003S091.20 150 1.60 2.102402703 3.33 Rotor position elec deg 100] E M.F. vs Rotor position 4.00 若 4.① 0.30 120 150 10 2.10240270 3.50 Rotor position [elec deg 100 Torque vs Rotor position 0 0.0 0.3 D.90 15 2.0 2.40 2 30 3.3 3. 60 Rotor position [elec deg" 100] 16-Sep-08 (C)SPEED Laboratory 2008 For use in designated meeting/class only. Please do not make unauthorized copies Slide 8 of 54 Genera Static design and dynamic design PC-BDO lED STATIC DESIGN DYNAMIC DESIGN a For electrical machine designers and a For drive designers and power electronics engineers engineers a Forced current waveform ■ Full simulatⅰ on of the drive or Pure ac voltage source current waveform is output, not input a No power electronics Current a Limited choice of inverter controls (Sw_ctD) Far fewer parameters to worry about Probably does not match the actual drive a Definite knowledge of the machine a Definite knowledge of the drive a Very fast But often the machine model is oversimplified Can use finite-elements efficientl Torque ■ Can be s|ow You have all the simulation issues that arise in the solution of differential equations together with a state machine a Cannot use finite-elements efficiently possible but slow, and hard to interpret Static design is under-utilized. Too many users charge ahead into Dynamic design when they don't need to oltage is the link 6-Sep-08 (C)SPEED Laboratory 2008 For use in designated meeting/class only. Please do not make unauthorized copies Slide 9 of 54 SINEWAVE DRIVE Voltage locus sets limits for all sinewave drives PC-BDC spEED Voltage limit locus oltage locus as y varies jXqgjlc Eal lphl Phi Current locus 16-Sep-08 (C)SPEED Laboratory 2008 For use in designated meeting/class only. Please do not make unauthorized copies Slide 10 of 54

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