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This paper investigates two methods of self-sensing rotor position estimation based on signal injection for a homopolar synchronous motor. The magnetic anisotropy of the machine can be utilized for rotor position estimation, which can exclude a position encoder from the system in order to increase reliability of the drive. The stator response observer was tested and the field response observer was...
This paper deals with the control strategy for synchronous homopolar machine adapted for traction applications. Advantages and disadvantages of homopolar motors are first discussed. Mathematical models and variations of its design are given. The structure of the proposed control strategy is based on field oriented control but it was modified in order to achieve maximum performance according to experimentally...
This paper considers the problem of self-sensing control capability for synchronous homopolar machine. The advantages and disadvantages of the homopolar motor for traction application are discussed. The magnetic anisotropy of this machine allows to implement encoderless control systems which operates in the whole speed range. This feature is very important for traction applications to reduce the cost...
This paper deals with the derivation of commutation angles for maximum torque for switched reluctance motors operated over their entire speed range. A linearised model of the motor was used for this purpose, and the definition of the rated speed was derived. It is shown that the switched reluctance motor provides constant power in the field-weakening mode in case of continuous current operation. Then,...
In this paper an adaptive rotor flux observer is developed. This observer performs a real-time correction of the mutual inductance and rotor resistance of the motor using data from the DC-link voltage sensor, the inverter state and the phase current and position sensors. The observer compares the behavior of two independent observers (sensorless and sensored observers) in order to correct the parameters...
This paper deals with the variable structure control system which implements sensorless control for two-phase switched reluctance drive. The sensorless control method based on flux linkage estimation is considered. The method of the automatic angle adjustment was proposed for the optimization of the motor efficiency on various speeds and loads. Finally the sensorless control strategy for zero and...
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