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Advance in high-tech industries is due to evolution, respectively performance of electrical machines. Worldwide, designers are concerned to find answers to current questions such as: performance growth of asynchronous motors, reduce manufacturing and operating costs by adopting solution in line with global optimization approaches. Condition imposed to asynchronous motor design is limited startup current...
The most critical part of the induction machines which determines on their life time operation are rolling element bearings. To ensure reliable drive with an induction machine requires deep insight in electro-mechanical dynamics during its operation. The flexible multibody modeling technique enables the simulation of dynamic loads on all drive components. This paper focuses on complex dynamic modeling...
In this paper there are presented a series of dynamic regimes obtained for the case when some disturbances occur during the operation of a reluctance synchronous motor operation: the decrease of the sinusoidal supply voltage value and the supply by a non-sinusoidal source of voltage (indirect voltage and frequency converter voltage source with PWM command and voltage inverter with pre-computed moments...
In this paper, the authors present the analysis by Finite Element Method software packages of optimization of a permanent magnet synchronous motor with low speed, used to drive a bicycle. Advanced licensed software CAD/CAM/CAE were used for modelling and simulation of electromagnetic field, ANSYS Electromagnetics Low Frequency (Maxwell 2D/3D, RMxprt) - products of ANSYS Inc. There are presented some...
For sensorless position detection of permanent magnet synchronous machines at very low speed and standstill, signal injection methods are commonly used. As a prerequisite these so called saliency-tracking methods require a differential magnetic anisotropy of the machine, which is both position and load dependent and thus varying during operation. So the performance of sensorless operation strongly...
The control of active and reactive power of a doubly-fed machine (DFM) can be—due to the application of power electronics—very rapid, comparable to the control of FACTS devices. Besides DFMs in pumping-storage plants will become an important part of Slovenian electric-power system and it is important to know how these machines are working. This paper presents how to model a control of a DFM in a pumping-storage...
The electric power generation using hydro potential is increasing around the globe due to many reasons like increasing power demand, deregulated markets, and environmental concerns etc. At the same time, extended transmission networks, higher degrees of interconnection between different networks, and fast connection and disconnection of the heavy loads demand flexible, fast power generation and consumption...
The paper presents the bond graphs approach to modelling electrical machines for controlled electromechanical systems applications. The bond graph models of electrical machines are based on the models of ideal couplings: transformer and electromechanical couplings, respectively. Using the couplings models as building blocks the models of electrical machines (brushed and brushless DC machines with...
Electrical machines diagnosis needs a modelling approach reliable and as close to the reality as possible. It is shown that by proper modelling of the induction machine it is possible to detect the effect of the different faults on the machine current and vibrations. This paper proposes a model based on permeance network method (PNM) for the simulation of faulty induction machines. The PNM allows...
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