Calculation capabilities

in the field of electrical

rotating machines

Models that include

• Precise geometry

• Features of production materials

• Dynamic effects

• Motion

Finite Element Models (FEM)

Electromagnetic calculations

• Voltage waveform calculations

o Stator teeth skew factor

o FFT analyses

o Harmonic distortion; THD, THF, Fd

o Effects of damper winding

FEM Electromagnetic calculations

FEM Electromagnetic calculations

• Machines for transformer testing

(special purpose machines)

• Design differences

• Filter effects

• Effects of transformer connection

FEM Electromagnetic calculations

• Coupling of machine with power converter

• Effects of trapezoidal currents

• Voltage waveform distortions

• Damper winding currents

• Electromagnetic forces

• Radial and tangential force component

• Forces on stator tooth

• Forces on stator core

• Torque calculation

FEM Electromagnetic calculations

FEM Electromagnetic calculations

• 3D Problems

• Detailed 3D machine models

o End region of stator and rotor winding

o End region of rotor pol shoe and stator core segments

o Slot wedges, core end plate, tooth support

• Analyses of different design solutions

Asynchronous motor starting

• Currents, speed, electromagnetic torque

• Torque characteristic determination

FEM Electromagnetic calculations

FEM Electromagnetic calculations

Stator winding fault simulation:

• Voltage waveform for faulty and regular condition

• Stator winding currents waveform for faulty and regular

condition

• Damper winding currents

• Forces

2

1

4

3

5

FEM Electromagnetic calculations

• Simulation of sensor output

in regular and faulty condition

• Faults of squirl cage bars

• Faults of stator winding

• Eccentricity detection

Analyitical ventilation and heat transfer calculations

• More then 45 years of experience in heat transfer and windage calculations for various rotating electrical machines

• Lumped parameters models

• Fast and accurate

• Empirical parameters based on experiments

• Continuous development

CFD calculations

• Modern, up to date approach for detailed calculations

• Calculation of windage losses

• Optimization of generator ventilation circuit

• Modelling of complete or just specific parts of the hydro generator

• Heat transfer analysis and determination of hot spots

• Good agreement with experiments

Mechanical FEM calculations

• Natural frequencies (eigen values) of different construction parts

• Ventilation blades

• Generator shaft

Generator casing

Windgenerator construction elements

Mechanical FEM calculations

• Stress calculations

• Stress distribution

• Material fatigue

• Damage of rotor shafts

0

0 p/3

Mechanical FEM calculations

• Kinematics and dynamic

• Switchgear motor - mechanism

Need great and reliable R&D?

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www.koncarmonitoring.com