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In this paper the effects of saliency and cross-coupling in a cylindrical wound-rotor synchronous motor are evaluated within the operating region of the direct-axis, quadrature-axis and field excitations. In the calculation of the wound-rotor synchronous motor parameters, a finite element based approach (principle of frozen permeability) is followed to evaluate the inductances and flux linkages of...
This paper proposes a novel type of watt-range permanent-magnet energy harvester, which harvests energy from a moving conductive body or surface without mechanical contact, as its operation is purely based on eddy-current coupling. The harvester's main advantage over existing solutions is that it allows energy transfer over atypically large (2 … 15 mm) air gaps, which are unavoidable in certain industrial...
This paper describes a generalized method to develop steady state model (SSM) of different electric motors comprising electric equivalent circuit (EEC) and the torque equation. In most of the books on electric motors, EEC is used to explain operation and performance characteristics of motors, but the development of these EECs is not explained convincingly. This work overcomes this shortcoming by specifically...
In this paper there are researched and compared three types of cylindrical magnetic couplers (MC): active MC, reactive MC with yoke and reactive MC without yoke. The comparison is made by the couplers' maximal mechanical torque, which is their main characteristic. The torque is calculated applying software QuickField by designing the magnetic field. The QuickField is based on the finite elements method...
Dual mechanical ports machine (DMPM) is used in hybrid electric vehicle to perform the same functions as Toyota Hybrid System. A DMPM is a new structure machine with two rotors those can run in different speed [1]. In this paper, both the equivalent magnetic circuit and FEA method are employed to analyze the electromagnetic coupling of DMPM. The analysis results indicate that the electromagnetic coupling...
In the development process of electrical drive trains, consisting of a motor, the power electronics and the control scheme, it is difficult to predict the exact machine and control behavior in combination with the converter. Therefore, system simulations with analytical machine models embedded in a circuit simulation environment are performed. In order to increase accuracy by paying attention to parasitic...
The paper presents comparison of two control techniques (a) sliding mode and (b) forced dynamics for control of electric drives employing permanent magnet synchronous motors with flexible coupling. The designed controllers are of the cascade structure, comprising an inner speed control loop and an outer position control loop. The inner speed control loop for both controllers is based on forced dynamics...
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