Modelling, investigation, simulation, and PID current control of Active Magnetic Levitation FEM model

Abstract

This elaboration presents the numerical model of the Active Magnetic Levitation (AML). The model is developed in the 2D axis symmetry mode. The Finite Element Method is used to calculate the magnetic field. The Ordinary Differential Equation is solved simultaneously to simulate the levitated object motion. The model is solved in the time domain, together with the levitated object motion being simulated. A few investigation simulations are realized to diagnose the basic properties of the model. The PID current mode controller is used to drive the coil and keep the object levitated in the desired position. The electromagnetic force and magnetic flux density are investigated to analyze the AML non-linearities. Finally, the conclusions towards the experimental research are given.

Modelling of the Glass Melting Process for Real-Time Implementation

“…They allow for the building of complex models and perform the identification stage [19] to expanding knowledge about system functioning, dynamics and cross coupling. Moreover, it is possible to apply such a tool to develop a completely functional virtual prototype, which consists of physical phenomena, motion dynamics and control methods.…”

Two Models for Time-Domain Simulation of Hybrid Magnetic Bearing’s Characteristics

“…Magnetic field distribution inside the electric machine has been calculated by 2D [7,8] and 3D FEM [9]. An external electric circuit can include an inverter supply system [10], distorted voltage-excited sources [9] and even control loops [11]. Commercially available software such as Ansys Maxwell or Comsol allows for simulating transient states based on FC-FEM [11,12].…”

“…An external electric circuit can include an inverter supply system [10], distorted voltage-excited sources [9] and even control loops [11]. Commercially available software such as Ansys Maxwell or Comsol allows for simulating transient states based on FC-FEM [11,12]. Unfortunately, the calculation of transient states using FC-FEM takes a lot of CPU time, because magnetic field equations need to be solved at every simulation step of the circuit equations and torque/force balance equations.…”

Magnetic Levitation – Modelling, Identification and Open Loop Verification

“…Modelling and identification problematics of the magnetic levitation process can be found e.g. in [9,10,[13][14][15][16][17][18][19][20][21]. Usually first principle model is derived, and the unknown parameters are estimated from experimental data.…”