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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
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Mechanical FEM calculations
• Kinematics and dynamic
• Switchgear motor - mechanism
Need great and reliable R&D?
Contact us today
www.koncarmonitoring.com
