low freq simulation 2013
DESCRIPTION
CST Microwave Studio Low frequency Simulation Manual v 2013Low Frequency Simulation TheoryTRANSCRIPT
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Low Frequency Simulation
New Features in 2013 Adrian Scott, Low Frequency Market Development Manager
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Start default view: new and recent
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Choose the appropriate module
and workflow
Set the main project settings
Configuration wizard helps to
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Configuration wizard helps to
Choose the appropriate module
and workflow
Set the main project settings
For particular applications
multiple solvers can be applied
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New modeling interface
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Ribbon based user interface - Home
Most often used
functions like prob-
lem type, solver
choice, mesh view…
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Simulation ribbon
All simulation re-
levant functions.
In particular, all
possible sources.
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Mesh ribbon
Contains all meshing
tools.
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Selecting a result
from the navigation
tree switches
automatically to
2D/3D plot ribbon.
2D/3D Plot ribbon
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A nice new feature
is smart scaling
which adjusts the
range of the plot
automatically and
uses logarithmical
scaling if
appropriate.
2D/3D Plot ribbon – smart scaling
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Help page, ribbon search and video
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CST EM STUDIO® Solvers Overview
Electrostatics
Stationary
Currents
Magnetostatics
Low Frequency
Time Domain
Low Frequency
Frequency Domain
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Electrostatic simulation of a 24 kV SF6 gas-
insulated ring-main unit load break switch
Load Breaker model used
with permission from ABB
Plot of Instantaneous electric scalar potential
Corresponding plot of electric field strength
19.6 kV
-9.8 kV
-9.8 kV
Pro/Engineer Import
Dielectric and PEC materials
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Visualization and ASCII export of
electric field along streamlines
Curved Elements
Up to 3rd order elements
Electric field strength in bolt
= 2.62 kV/mm (field at cursor
function)
Electrostatic simulation of a 24 kV SF6 gas
insulated ring-main unit load break switch
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6/4 Switched reluctance motor (SRM)
Automatic conversion of 3D model to 2D
at user-defined plane.
No discrepancies between 2D and 3D!
2D of several orders faster than 3D!
Asymmetric bridge converter
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4-Pole surface permanent magnet motor:
Optimization of cogging torque
The torque is extracted as a function of mechanical angle over a
limited range. Geometrical features such as slot width, magnet pole-
arc pitch can be optimized with integrated optimization module.
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Stator – Non-Linear BH
Rotor Spacers [8]- Non-Linear BH
Stator Coils [3]
Permanent magnets [9] with alternating axial magnetizations
3-Phase tubular permanent magnet linear
generator (TPM-LiG) for marine applications
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3-Phase tubular permanent magnet linear
generator (TPM-LiG) for marine applications
2D Axisymmetric Magnetostatic Solver
Induced Voltage for each phase as a function of time
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New generation solvers • All solvers now support higher order and curved elements:
• Element Order up to 3 (2nd order default)
• Curvature order: fixed or automatic
• Direct and iterative solver (automatic default or user selected )
magnetostatic simulation of a
solenoid Transient eddy current simulation of
a sensor for deep flaw detection Electrostatic breakdown analysis
In a load breaker
Non-linear current flow in
A HVDC Insulator
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• New current coil & coil segment definition
• Transformation also available
Source definitions
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• Simplified current coil & coil segment definition
Coil segments:
Select face +
use pick point
Current coils & coil segments:
Select face + curve
Coil segments:
Select face +
define height
Improved source definition
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Electrostatics – Open boundary
bounded (tangential condition) open boundary (infinite element)
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Insulator with open boundaries Field strengths along line: Model with open BC
gives same result as with tangential BC and large
box. Tangential BC and small box shows
significant deviation.
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Define potentials on multiple electrodes.
Electrodes 2 & 3 on same potential.
C-Matrix
3x3
2x2
C-Matrix reduction for multiple bodies
Electrode 1
Electrode 3
Electrode 2
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Nonlinear material properties E=f(J)
Stationary current solver
σ=f(E)
E=f(J)
Electric
Field
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Sensors – Non-destructive testing – TEAM 27
Adrian Scott, CST AG
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Extensions to LT signal database
Useful for known trapezoidal current
waveforms commonly found in power
electronic components.
Transient flux density variation in inductor core
Current and voltage waveforms
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Additional BH material data
• New material defintions
• From curved fitted measurement data**
• 3C90 Ferrite for power electronic components
• Other materials available – M19, M36, M43, M47, MN08 etc.
**
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Non-linear inductance calculation Choice of inductance extraction to suit purpose e.g. third party co-simulation. Operating point of multiple coils applied to inductance calculation. Automatic flux linkage also available.
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EM/Circuit Simulation: dynamics of a simple solenoid
Using the analogy between
voltages/ current and
position/force
Integrated circuit
simulation solution
CST DESIGN STUDIOTM
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Using the analogy between
voltages/ current and
position/force
EM/Circuit Simulation: dynamics of a simple solenoid
Integrated circuit
simulation solution
CST DESIGN STUDIOTM
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Electromechanical and power electronic
devices — state space modeling
CST – COMPUTER SIMULATION TECHNOLOGY | www.cst.com | Apr-13
Look-up table tools for import of EM
data (force, current, flux linkage)
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Non-linear inductance • Apparent and Incremental
• Remanent flux linkage matrix entries