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1 Maszyny Elektryczne : zeszyty problemowe

1 2010

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Konstrukcja reluktancyjnego wzbudnika drgań skrętnych: elementy mechaniczne, uzwojenia i rdzeń magnetyczny

Burlikowski W., Pilch Z.

Maszyny Elektryczne : zeszyty problemowe

2010

Nr 87

113-118

In the paper the main mechanical, electrical and magnetic components used in torsional vibration exciter design are described. The exciter is a special actuator enabling fatigue test for blocked-rotor conditions and evaluation of properties of complex drive systems in steady state conditions (e.g. eigenfrequencies). The main goal of the design process is decrease of angle harmonics in electromagnetic torque, in particular slot harmonics. Analysis is based on analytical approach using Fourier series method applied to results obtained with the help of 2D Finite Element Method. The most important design alteration resulting from obtained results is the step skew of the rotor core, which enables compensation of chosen torque harmonics. The other result of research is introduction of sinusoidally distributed stator windings. Resulting torque – angle characteristic is very smooth, thus enabling easier control of instantaneous torque (constant and pulsating components) which is the basic requirement for the designed vibration exciter. In order to verify mechanical properties of the design a 3D Finite Element Model was created. It enabled calculation of eigenfrequencies of the rotor, which are much higher than expected maximum operation frequency of the exciter equal to 1 kHz.