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The purpose of this paper is to present a brief comparison between a conventional hexacopter and a cant angle hexacopter. A conventional hexacopter has got all its 6 rotors fixed and thrusted upwards in the body frame which gives it a decoupled 4 DOF motion or a coupled 6 DOF motion. But a cant angle hexacopter has all its six rotors canted at an angle tangentially to the radius of the frame. It provides...
The subject of the paper is focused on the analysis of a 30kW switched reluctance machine for propulsion of electrical vehicle propulsion (EV). The paper details the fundamental steps when developing such an electrical machine, and validates the structure using co-simulation procedures, coupling finite element analysis software (Cedrat Flux2D) with software used to implement the controller (Matlab/Simulink)...
The present investigation is aimed at exploring the feasibility of using vertical axis turbine which, otherwise, is ideally suited for wind energy conversion system (WECS), for hydropower generation. River water currents are potentially significant and reliable source of power generation and currently no significant work has been carried out to tap this source of energy. Electrical energy can be efficiently...
The history of faults of induction motors is nearly the same age as the history of induction motors. In the past, induction motors were used in limited places and the faults were solved by taking various measures such as grounding, using over-current protectors, or using voltage-regulators. Nowadays the induction motors are used in a wide area of applications. Therefore the diagnosis and repair of...
Wind power, as an important and promising renewable resource, is widely studied. Because the wind is highly variable, it is very desirable to operate a wind turbine at variable speeds. In this respect, doubly fed induction generator (DFIG) has become popular in wind power generation system. The steady state simulation analysis of a DFIG is essential to understand the behavior of DFIG such that it...
Dual-rotor permanent-magnet synchronous motor has two rotors (outer rotor and inner rotor), one of them is the stator in the traditional motor. So it has a wide application range such as in electric vehicles, hydroelectric generator, and wind power and so on. This paper proposes DRPMSM, introduces its principle, structure, mathematical model and gives its simulation model based on MATLAB. The simulation...
The control scheme is presented to aim at the speed control of single phase induction motor. It consists of fuzzy controller, two tracking differentiators, and speed estimator. At first, The design of rotor speed estimator is carried on, which the rotor speed can be obtained according to the general mathematic model of single phase induction motor and rotor estimating speed be used instead of rotor...
At motor start-up process, the motor speed is constantly changing, the input voltage adjustments should follow the changes of motor speed timely, or it is difficult to achieve the desired objectives, but the traditional way increased the cost of maintaining, complexity, and made the reliability lower, which would certainly affects the usage and scope of the controller. This paper presents a new method...
The previous methods on broken rotor bars fault diagnosis of squirrel cage induction motor (SCIM) were just for motors fed with industry frequency power supply. In this paper, a simulation modeling of SCIM supplied with variable frequency power is introduced, which respectively in normal condition and in broken rotor bars conditions. Through the comparison and analysis of the one-phase stator current...
The vibration originated from the rotor's unbalance mass impacts on the current oscillation. As the rotor rotating at high speed, Power amplifier circuit will be burned down by excessive control current. While vibrating force transfers to frame, which causes the system vibration and influence the dynamic properties and safe operation. So unbalance compensation on the rotating machine is necessary,...
The new vehicle electric system comes up with new requirements for economical, efficient alternator design. A single-phase two-half-wave permanent-magnet (PM) synchronous generator for vehicle applications is designed. Its rotor is made up of a rotor core and several pieces of Nd-Fe-B permanent-magnet steel on the core. The simulation models of the permanent magnet generator and its regulator is presented...
The mathematical model of linear induction motor (LIM) based on slip frequency type vector control system is established. A self-adjusting fuzzy controller (SAFC) is designed as magnetic thrust adjuster of the motor. The speed of the motor is adjusted by control magnetic thrust of the motor. The scheme of the slip frequency type vector control system of the LIM is obtained by observing the magnetic...
Models of non-standard induction machines with number of phases higher than 3 are not commonly available and require special effort to implement. This paper presents a model of induction machine with arbitrary number of phases on the stator and rotor, which has been implemented in Matlab-Simulink. It is shown that machines with number of phases higher than 3 have less severe torque pulsation and the...
In order to measure accurately rotor flux, easily and simply estimate rotor speed for induction motor, this paper proposed a rotor flux observer based on a novel voltage model, and an original sensorless control method based on the phase difference between the stator current vector and the stator voltage vector. A novel voltage model was constructed, and then the rotor flux observer was established...
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