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In this paper, a high energy efficiency control strategy for electric power generation with synchronous reluctance machine (SynRM) is proposed. This kind of machine is gaining attraction in various fields of application due to its high efficiency, compactness and the capability of operating over a wide speed range. These features are highly desirable for generators especially those that operate from...
In order to control the speed and/or position of permanent magnet (PM) motors, they require position sensors. Basically, the auto-commutation needs 3 sensors for a 3-phase motor. In micro-motors, as there is no space for the sensors, self-sensing must be used. In any case, suppression of the sensors enhances the overall reliability. The motor becomes a sensor itself and electromagnetic phenomena are...
Performance investigations and drive designs of an interior permanent magnet (PM) machine, in both the constant torque and the flux-weakening operating regions, are generally conducted based on the machine parameters that are calculated from finite element analysis (FEA). To properly select the optimal current control angles for maximum torque generations at various speeds, this paper presents thorough...
This paper deals with the identification of a synchronous machine parameter usefull for the purpose of sensorless and current control. Deviations from the steady-state voltage are generated by the current controller in order to drive the current to its desired value. In sensorless drives, voltage deviations from steady state are used in the case the back-EMF is too low to obtain an accurate rotor...
This paper proposes a new robust position sensorless control of Interior Permanent Magnet Synchronous Motors(IPMSMs) to inductance variation using the un-known input observer. In position sensorless control of IPMSMs, accurate motor parameters are required for position estimation. However, inductance variation due to magnetic saturation is known to heavily deteriorate performance of sensorless control...
Numerical methodology identifying the d-q axis parameters for Interior Buried PM Synchronous Motor (IPMSM) with multi-layered PM has been proposed. In addition, cross-magnetization between d-q axis in IPMSM with the magnetic saturation is investigated via the newly adopted synthetic flux linkage, which can be identified numerically and experimentally. Numerically identified synthetic flux linkages...
A sensorless control scheme of synchronous reluctance motor (SynRM) drives is presented using the balanced 3-phase carrier frequency component of a PWM inverter. SynRM has inherent rotor saliency and its position is estimated from alpha and beta carrier current component and the appropriate signal demodulation. The improved method of restraining d-axis current is proposed to reduce estimation error...
This paper analyzes effects of magnetic saturation, including cross-saturation and secondary saliencies, on saliency- based sensorless control of interior PM synchronous machines. These effects are mitigated by adaptively decoupling saturation induced-saliencies via a structured neural network. The paper includes identification of the dominant, saturation-induced components of the carrier signal current...
This paper proposes an on-line compensation strategy of the unwanted disturbance voltage due to the zero current clamping effect for high-frequency-signal-injection based sensorless control schemes. An analytical model is derived which reveals intrinsic characteristics of the zero clamping effect for the high frequency signal injection. The model in this form is subsequently incorporated into the...
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