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This paper proposes two different low-cost ferrite solutions: first a V permanent magnet assisted synchronous reluctance rotor (VPMSynRM) and the second a permanent magnet synchronous rotor with flux concentrator (PMSM-FC) as an alternative solution to the rare earth inserted tangential permanent magnet synchronous motor (PMSM). Finite element (FEM) approach has been utilized to show the performance...
This paper proposes two low-cost ferrite V permanent magnet assisted synchronous reluctance rotors (VPMSynRM) as an alternative solution to the rare earth inserted tangential permanent magnet synchronous motor (PMSM). Finite element (FEM) approach has been utilized to show the performance of the proposed rotors. The purpose of the proposed solution is to replace only the rotor of such a PMSM that...
In this paper we propose three mathematical models for photovoltaic solar panels. The mathematical modeling of photovoltaic solar panels (PVSP) is essential in the analysis of solar power systems operation. The simulations can predict the performance of different configurations of solar energy conversion systems in power, and allow the choice of the technically and economically optimal variants. Mathematical...
Everyday events demonstrate (if there is still a need for demo) the need for security. One cause is the occurrence of antisocial events which seem to be once again on the rise. Another cause (increasingly important) is represented by terrorist threats. As events in New York, London and Madrid have demonstrated, this threat is very much alive. Video surveillance is an alternative attempting to prevent...
This paper proposes an original method of determining the maximum power function point of a wind turbine at variable wind speeds. There are presented the non-linear equations which model the wind turbine (WT), the diesel engine (DE) and the asynchronous generator (AG). The advantages of using the asynchronous versus synchronous generators are also outlined.
PMSM (permanent magnet synchronous motor with sinusoidal excitation) drive systems for low power applications are standard equipped with PWM inverter which employ a diode rectifier frond-end (has not a regenerative unit) to supply the ac power from the mains to the dc link. This paper proposes an algorithm to generate the optimum reference current for four quadrant operation of PMSM drive system,...
As the society evolves and the population grows, the demand for electrical energy increases. Search for new energy resources, increase the efficiency of the existing power plants, and cost minimization are actions to be taken. One way to reduce the cost is predicting the need for electricity. This problem is not new. This paper presents a low-cost method for short-term electric load prediction. After...
Based on the mathematical model of the wind turbine at a wind speed modeled as a sin wave in time, this paper analyses the behavior of the system with P, PI and PID regulators. We determine the speed at which the system must work in order to obtain a maximum amount of electricity in a time interval of hours and days. For this purpose, we measure the wind speed and knowing the mechanical characteristic...
This paper proposes an algorithm to generate the optimum d- and q-axes current references for PMSMS (permanent magnet synchronous motor with sinusoidal excitation) drive system for wide speed range that is fed by frequency converter that has no regenerative unit. The algorithm offers optimum torque capability for PMSMS despite significant changes in the dc link voltage and machine parameters and it...
Low-power PMSMS (permanent magnet synchronous motor with sinusoidal excitation) drive systems are standard equipped with PWM inverter which employ a diode rectifier front-end (has not a regenerative unit) to supply the ac power from the mains to the dc link. This paper proposes an algorithm to generate the optimum d- and q-axis reference currents for four quadrant operation of PMSMS drive system,...
This paper proposes an algorithm to generate the optimum d- and q-axes current references for PMSMS (permanent magnet synchronous motor with sinusoidal excitation) drive system for wide speed range that is fed by frequency converter that has not regenerative unit. The algorithm offers optimum torque capability for PMSMS despite significant changes in the dc link voltage and machine parameters and...
In this paper, the authors propose the embracing of a solution regarding the implementation of the direct vector control in torque and flux on the induction motor with squirrel cage rotor for the electrical drive systems of the naval mechanisms. Through this is desired the replacement of the actual technical solution, at which for the drive of the loading equipments are used induction motors with...
This paper proposes a field oriented control of PMSMS (permanent magnet synchronous motor with sinusoidal excitation) for wide speed range without current measurement sensors and using two Hall-effect sensors for position and speed estimation. The current sensors are eliminated, but the d- and q-axes armature currents are estimated using a Luenberger state observer with OC-link power input. The estimated...
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