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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...
A new fault detection method for induction machines (IM) is analyzed with respect to transient magnetic material behavior by means of finite element (FE) modeling. The detection method uses the machines inverter to excite the IM with transient voltage pulses and measures the corresponding phase current responses. To account for the material behavior transient BH curves are identified from measurements...
In this paper, a computer simulation of the Salient Pole Synchronous Machine (SPSM) is presented. This simulation employs a modeling based on the machine self and mutual inductance curves, determined from a methodology, not presented here. These methodology applies the experimental volt-ampere method to obtaining the inductances curves. From these inductance data, using a mathematical methodology,...
The windup phenomenon caused by the current limitation and PWM voltage regulation in the brushless DC motor (BLDCM) double PI loop speed regulating system has been investigated. And the anti-windup controller has been applied to suppress the relevant windup phenomenon. The simulation illustrates that the anti-windup controller make the BLDCM speed regulating less overshoot and quickly dynamic response...
The use of voltage source inverter (VSI) in high performance drives removes the restriction of the number of motor phases. Due to the reported advantages of multi-phase machines they have become of increasing interest to the industry. This paper provides a Matlab/Simulink built n-phase machine model in terms of physical variables along with the VSI and V/f control scheme that a user can easily set...
This paper presents a compensation method of matrix converter drive system in case of commutation voltage error and unbalanced input voltage with disturbance observer. There are two compensation disturbances. One is commutation voltage error. This is caused by the dead-time between the turn-on and turn-off of the IGBT mode switches. The other is unbalanced input voltage. As the matrix converter has...
Through the increasing use of electric actuators, the induction motor is now major in industrial applications and takes a particular interest for applications requiring high power and variable speed robustness and for its simplicity and its low cost. The early detection for motor deterioration can increase plant availability and safety in an economical way. To improve the reliability as a whole, a...
This work considers the seldomly treated case of rotor turn-to-turn fault of a doubly-fed induction generator. This fault can take place where the doubly-fed induction generator is a standard solution in wind power stations. For investigations an error-adoptable three phase machine model is derived and simulated. Furthermore the model is integrated in a wind energy plant model and simulated for a...
This paper presents a new induction motor model specifically developed for simulating self-sensored variable speed drives which employ signal injection based sensorless control techniques. The model is to be used to investigate improved filtering algorithms and closed loop speed controllers. The model employs a simple state space equivalent circuit based model of the induction machine, which is enhanced...
An electromagnetic model for Lundell alternator switched-mode rectifier system including the main parameters is presented. The purpose of the study that underlies this paper was to create a simple model, capable of providing a satisfactory description of the machine??s magnetic properties by considering of the saturation and the saliency. The paper deals with an approach using both analytic and experimental...
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