ANSYS Maxwell2020R1 – What’s New
2020R1 – What’s New
本文摘要（由AI生成）：
本文介绍了多个电磁学和机械设计领域的创新功能。首先，提出了针对总线条热问题的直接计算J和E场的方法，适用于多终端以任意波形激发和功率损耗的情况。未来计划增加外部电路、与Simulink的联合仿真、位移效应等功能。其次，介绍了自动部分模拟技术，用于全旋转机器的仿真，结合了全模型和手动创建的简化模型的优点。此外，还推出了电子桌面中的机械设计类型，支持模态和热求解器，并与电磁学进行双向耦合。最后，介绍了AEDT中的电动机设计热模拟功能，也支持模态和热求解器。
New Release Capabilities
1 Element-based Volumetric Harmonic Force Coupling
•Maxwell Eddy Current or Maxwell Transient to ANSYS Harmonic Response
•Uses Non-uniform Discrete Fourier Transform to covert to Freq domain for Harmonic Response and Harmonic Acoustics
2 2D Multi-slice Model for Object-based Harmonic Force Coupling
•Quasi-3D effects considered by 2D multi-slice model
•Object based harmonic force
•Harmonic force generated for full 3D mechanical (2D skew model is not supported in mechanical)
2D Multi-slice Model for Object-based Harmonic Force Coupling.
Enhanced Capabilities
1 Demagnetization Coefficient Plot in 2D and 3D
•Demagnetization coefficient definition:
Demag_coef[%] = Br1/Br0*100%
Demag_coef = 1, no any demagnetization at the location
Demag_coef = 0, fully demagnetized at that location
•Outputs:
•Demag_coef shade plot over all nonlinear permanent magnets
•Demag_coef curve with time at specific location using expression cache
•Demagnetization percentage statistics curves with time by accounting for all magnet volume associated with Demag_Coef above threshold from 0.1 to 0.9 with step 0.1 respectively (total 9 curves)
Demagnetization coefficient shade plot
Demag coefficient at specified location vs time
Demag percentage statistics curve vs time
2 Litz Wire Modeling
•Simple conductor considers individual strands
•New material composition: Litz Wire
•Wire type: Round, Square, Rectangular
•Considers additional ohmic loss due to skin and proximity effects
•Reports additional loss curve: StrandedLossAC
3 AC Winding Loss in Machine Toolkit
Stator winding loss:
P_copper=P_dc+P_ac
•DC winding loss:P_dc=I_rms^2 (R_a+R_b+R_c )
•AC winding loss:P_dc=〖3I〗_rms^2 R_ac=〖3I〗_rms^2 R_ac0 (f/f_0 )^2 (k_ξ/k_ξ0 )
where Rac0 is the user-defined ac-resistance at reference frequency, and
k_ξ=3/2ξ (sinhξ-sinξ)/(coshξ-cosξ), ξ=a√(πfμ_0 σ)
a is the width/diameter of the winding strand conductor.
Rac0, a, σ, and f0 are inputs in the machine toolkit UI.
Winding loss with dc loss only (Rdc = 0.015 Ω)
Winding loss with dc & ac losses (Rac = 0.003 Ω at 60 Hz)
4 New Machine Type: Synchronous Reluctance Machine
•The sweeping variables are phase RMS current, angle Gamma and Speed
•Auto angle alignment
•Periodic and half-periodic TDM supported
•DQ-axis component calculation: d-axis rotor has the largest permeance/inductance
6 Postprocessing Harmonic Force Density in Maxwell 2D/3D Transient
•Automatic FFT creates 2D reports: vector or amplitude at specified frequency – phase angle
•Harmonic force density reports and plots in Transient time-domain solver
BETA Capabilities
1 Maxwell 3D Transient - A-Phi formulation [Beta]
•Formulated using the A and electric scalar potential φ
•The first order edge elements for magnetic vector potential
A and the second order nodal elements for electric scalar potential φ
•Multi-terminal conductors support sources of various types on a single conduction path
•Partial inductance calculated (not loop)
•J and E fields calculated directly because it is the first order approximation Applicable for bus bar thermal problems where multiple terminals can be excited with arbitrary waveforms and the power loss can be
B=∇×A
B=μH
J=σ(-dA/dt- ∇ φ)
∇×μ^(-1) ∇×A=-σ dA/dt- σ∇ φ+∇×H_c
∇⋅(-σ dA/dt- σ∇ φ)= 0
Planned for future releases:
•External Circuit
2 Auto Partial Simulation for Full Rotational Machine [Beta]
•Full-model
Pros: easy to setup; better field visualization to understand physics
Cons: very large computation time
•Manually created reduced-model by applying planar master/slave boundary
Pros: much less computation time
Cons: not easy to setup; less intuitive from reduced-model visualization
•Auto partial model creation, meshing, simulation, post-processing with non-planar matching boundary
Preserve and combine all pros eliminating all cons from both full model and reduced model
•Applicable to non-skewed machine model with/without clone mesh [Beta]
3 Mechanical Design Type in Electronics Desktop [Beta]
•Mechanical Solvers: Modal and Thermal
•Supports 2-way coupling with electromagnetics
•Integrated UI: Modeler, Scripting, Optimetrics, Post Processing •Mesh: AEDT Classic/TAU mesher or mesh linking from Maxwell
•Installation and licensing (Icepak solver) in Electronics Desktop
Modal
NG
Thermal
4 Thermal Simulation for Electric Motor Design in AEDT [Beta]
•Mechanical Solvers: Modal and Thermal
•Supports 2-way coupling with
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