Electromechanical

This article is concerned with the application of CST EMS to the design and analysis of a tubular permanent magnet linear generator. Demonstrated is the proposal of a possible application of tubular generator, the analysis of a system definition in order to define a first optimization criteria and 3D electromagnetic simulation based on finite inegration method to carry out a parametric analysis of the machine behavior. This is a summary of the work carried out by Andrea Pirisi, G. Gruosso, Riccardo E. Zich of the Politecnico di Milano, Italy. Read full article..

A Switched Reluctance Motor (SRM) can be optimized on two fronts; the magnet design itself and the dynamic performance. Such a motor can be easily simulated with parametric magnetostatic solutions which can be solved using either the CST EM STUDIO® (CST EMS) 2D or 3D magnetostatic solvers. Only a single 3D model is required for both types of simulation ensuring that the geometry, excitation, materials and boundary conditions are consistent between the 2D and 3D models. Read full article..

CST EM STUDIO® is used to calculate the cogging torque in a 4-pole Surface Permanent Magnet Motor (PMSM). For such a calculation a parametric sweep is performed to determine the torque on the rotor at angular intervals. Only the permanent magnets are required in the model. The stator winding excitation is not necessary for this calculation and is hence omitted in this model. Read full article..

This article is concerned with the 3D electromagnetic modelling and equivalent circuit parameter extraction of a Resistance Spot Welding (RSW) gun. The parameters for the gun are not as easily established for the gun as for other RSW system components. The current transformer and electronic converter electrical parameters are either known or can be obtained by standard test procedures. This is not the case for the gun where the electrical parameters are unknown and difficult to measure. A 3D EM simulation using CST EM STUDIO® can be used to establish these parameters and complete the system characterisation. Read full article..

Automotive suppliers were among the first to incorporate numerical simulation in the product development process to reduce development cycles and minimize the production costs. Electromagnetic field simulation such as provided by CST EM STUDIO® (CST EMS) helps the engineers to accelerate product development. This article shows the application of CST EMS to the simulation of a stepper motor found in speedometer applications. Read full article..

This article shows a common approach to the simulation of electromechanical problems. A set of 3D electromagnetic field simulations using CST EM STUDIO® (CST EMS) are carried out on a linear actuator in order to obtain its electromagnetic characteristics for use in Simulink® where both the electrical and mechanical behaviour can be simulated. Read full article..

The combination of non-linear materials and eddy currents leads to a problem which cannot be solved with a steady-state eddy current solver. A transient solver is required and and inherently includes the feature that arbitrary time signals can be used for the excitation. The CST EM STUDIO® (CST EMS) transient solver allows such a simulation to be carried out. In this case, a Gas insulated Bus under short circuit conditions is investigated. The forces and losses on the bus bars can be calculated as a function of time. Read full article..

The simulation of a gas insulated switch at 50 Hz is simulated with the low frequency solver in CST EM STUDIO™ (CST EMS). A Pro/E® model is imported, appropriate three-phased sources defined and a simulation performed to obtain the current distributions in the three phase conductors. Read full article..

CST EM STUDIO™ (CST EMS) is applied to the simulation of a magnetic injection valve by use of its non-linear magnetostatic solver. The aim of the simulation is to obtain the force on the valve armature as a function of the air gap between the armature and the main valve housing. Using the powerful and easy-to-use parameterisation features in CST EMS, a familly of force curves as functions of gap and excitation current can be easily generated. Read full article..

Guillermo Vietti, Politecnico di Torino A VBA script has been developed, controlling all CST STUDIO SUITE™ tools to represent all mechanical elements in the space around the tire in a vehicle, incorporating this complex geometry in a parametric way. One of the applications of this script is for the study of EM field propagation inside and outside the tire. The same script is capable of choosing the appropriate mesh parameters to optimize the simulation time, with the radiating element inside the tire. It is capable also to set field monitors at all frequencies and to run the simulation automatically. The tire geometry is mainly designed with azimuthally variable tire sections, taking in account the deformation of the tire. The main advantages of designing a parametric geometry controlled by a VBA script are the possibility of: -> adapting the model to different vehicles and tires. -> studying the EM propagation in the whole 3D space for different orientations of the tire and angular positions of the radiating element, without the need of re-designing the structure. -> changing the deformation of the tire near the ground surface due to the load of the vehicle, taking into account the asymmetries of the model. The EM effect of this deformation on the propagation depends on the position of antenna. -> running many iterative simulations, changing iteration variables simply introducing the VBA script inside a cycle “for … next”. Read full article..

CST EM STUDIO™ can be used to obtain the force-current characteristics of a magnetic brake. The Magnetostatic Solver is ideal for such an application. Read full article..

This article summarises the setup and simulation of a small DC machine (50 W; 6000 rpm; 14 V) with ferromagnetic material, a double-layer wave rotor winding (Cu) and ceramic magnets on the stator side. CST EM STUDIO™ (CST EMS) features such as tetrahedral meshing, non-linear materials, easy-to-use parameterisation of geometry, rotor angles and armature currents are all applied to the simulation of the motor. Read full article..

The article describes the simulation of a MEMS comb sensor using CST EM STUDIO™. First different shapes of the combs are discussed. Using CST EMS's efficient mesh scheme, the full structure was also simulated. Read full article..