Low Freq Simulation 2013

CST – COMPUTER SIMULATION TECHNOLOGY | www.cst.com CST – COMPUTER SIMULATION TECHNOLOGY | www.cst.com

Low Frequency Simulation

New Features in 2013 Adrian Scott, Low Frequency Market Development Manager

CST – COMPUTER SIMULATION TECHNOLOGY | www.cst.com

Start default view: new and recent


Choose the appropriate module

and workflow

Set the main project settings

Configuration wizard helps to


Configuration wizard helps to

Choose the appropriate module

and workflow

Set the main project settings

For particular applications

multiple solvers can be applied


New modeling interface


Ribbon based user interface - Home

Most often used

functions like prob-

lem type, solver

choice, mesh view…


Simulation ribbon

All simulation re-

levant functions.

In particular, all

possible sources.


Mesh ribbon

Contains all meshing

tools.


Selecting a result

from the navigation

tree switches

automatically to

2D/3D plot ribbon.

2D/3D Plot ribbon


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


Help page, ribbon search and video


CST EM STUDIO® Solvers Overview

Electrostatics

Stationary

Currents

Magnetostatics

Low Frequency

Time Domain

Low Frequency

Frequency Domain


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


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


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


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.


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


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


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


• New current coil & coil segment definition

• Transformation also available

Source definitions


• 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


Electrostatics – Open boundary

bounded (tangential condition) open boundary (infinite element)


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.


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


Nonlinear material properties E=f(J)

Stationary current solver

σ=f(E)

E=f(J)

Electric

Field


Sensors – Non-destructive testing – TEAM 27

Adrian Scott, CST AG


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


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.

**


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.


EM/Circuit Simulation: dynamics of a simple solenoid

Using the analogy between

voltages/ current and

position/force

Integrated circuit

simulation solution

CST DESIGN STUDIOTM


Using the analogy between

voltages/ current and

position/force

EM/Circuit Simulation: dynamics of a simple solenoid

Integrated circuit

simulation solution

CST DESIGN STUDIOTM


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)


Non-linear inductance • Apparent and Incremental

• Remanent flux linkage matrix entries

Low Freq Simulation 2013

Documents