Design and Implementation of Magnetic Bearings for Vertical-Axis Wind Turbine with Permanent Magnetic Synchronous Generator

2013 ◽  
Vol 634-638 ◽  
pp. 3748-3756
Author(s):  
Meng Jen Chen ◽  
Yu Chi Wu ◽  
Jie Lu Liao ◽  
Jin Yuan Lin ◽  
Hsien Yin Chiang ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Electric Power ◽  
Synchronous Generator ◽  
Vertical Axis ◽  
Magnetic Bearing ◽  
Magnetic Bearings ◽  
Physical Contact ◽  
Vertical Axis Wind Turbine ◽  
Analysis Software ◽  
Design And Implementation

In this paper, the design and implementation of a passive magnetic bearing for a vertical-axis wind turbine with a permanent magnetic synchronous generator (PMSG) is presented. By applying a commercial analysis software for electromagnetics, the design of the magnetic bearing is discussed first, then the design of the structure of the wind generator is proposed. The proposed design successfully lifts a PMSG, and the wind turbine generates electric power, decreasing the physical contact largely and the noise and increasing the longevity of the rotating components.

Research on combination of passive magnetic bearing and mechanical bearing for vertical axis wind turbine

2021 ◽  
pp. 1-16
Author(s):  
Zhu Jun ◽  
Zhang Zhenyi ◽  
Cao Di ◽  
Du Shaotong ◽  
Guo Xiangwei ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Wind Turbine ◽  
Stable State ◽  
Vertical Axis ◽  
Magnetic Bearing ◽  
Suspension System ◽  
Vertical Axis Wind Turbine ◽  
Radial Bearing ◽  
Stable Suspension ◽  
Light Wind

Aiming at the “light wind start, light wind power generation” of vertical axis wind turbine, a new T-shaped radial passive magnetic bearing with high suspension characteristics is proposed. Passive magnetic bearings used in vertical axis wind turbines usually have small bearing capacity and difficult magnetization. The new T-shaped radial PMB can improve the radial bearing capacity, and the three magnetic rings all adopt simple axial magnetization. The new T-shaped radial PMB is combined with mechanical auxiliary bearing to form the suspension system of wind turbine. In the stable state, the suspension system can realize radial and axial stable suspension. The structure and working principle of the suspension system are briefly described. Through the finite element simulation, the characteristics of the new T-shaped radial PMB, the traditional double-ring PMB and the T-shaped PMBs are compared. Taking the high bearing capacity and high stiffness of the new T-shaped radial PMB as the optimization objective, the multi-objective optimization of the new T-shaped radial PMB was carried out by changing its geometric parameters (inner diameter, magnetization length and air gap). The research results show that: Under the same bearing capacity, the volume of the new T-shaped radial PMB is reduced by about 78.64%. Under the same volume, its bearing capacity increased by about 30.7%, and its stiffness increased by about 96.1%. After optimization, its radial bearing capacity increased to 101.38 N, and its stiffness increased to 202.76 N/mm.

A Comparative Analysis of Three-Phase, Multi-Phase and Dual Stator Axial Flux Permanent Magnet Synchronous Generator for Vertical Axis Wind Turbine

2013 ◽  
Vol 446-447 ◽  
pp. 709-715 ◽  
Author(s):  
M. Shahrukh Adnan Khan ◽  
Rajprasad K. Rajkumar ◽  
Rajparthiban K. Rajkumar ◽  
C.V. Aravind
Keyword(s):  
Wind Turbine ◽  
Permanent Magnet ◽  
Synchronous Generator ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Synchronous Generators ◽  
Permanent Magnet Synchronous Generators ◽  
Wind Turbine System ◽  
Three Phase ◽  
Multi Phase

In this paper, the performances of all the three kinds of Axial type Multi-Pole Permanent Magnet Synchronous Generators (PMSG) namely Three-phase, Multi-phase or Five Phase and Double Stator fixed in Vertical Axis Wind Turbine (VAWT) were investigated and compared in order to get an optimal system. MATLAB/Simulink had been used to model and simulate the wind turbine system together with all the three types Permanent Magnet Generators. It was observed from the result that with the increasing number of pole in both low and high wind speed, the five phase generator produced more power than the other two generators. In general, it was observed that the responses of the Multi-phase generator at both high and low speed wind showed promising aspect towards the system followed by Dual Stator. But with the change of the variables such as wind velocity, turbine height, radius, area together with the generator pole pairs and stator resistance, the optimum system should be chosen by considering the trade-off between different configurations which were firmly analyzed and described in this paper.

Design and Performance Evaluation of an Economical Vertical Axis Wind Turbine

2016 ◽  
Author(s):  
Abdelghani Himri ◽  
Emil Göttlich
Keyword(s):  
Developing Countries ◽  
Wind Turbine ◽  
Global Financial Crisis ◽  
Synchronous Generator ◽  
Vertical Axis ◽  
Good Alternative ◽  
Energy Prices ◽  
Energy Access ◽  
Vertical Axis Wind Turbine ◽  
The World

Nowadays, ensuring access to energy is one of the serious challenges the world confronts. For those who live in poverty, a shortage of access to energy services desperately influences and undermines health, affects education and development. The problem of energy access for the poor countries has become even more intense because of the impacts of climate change, the global financial crisis and volatile energy prices. Then a use of another sources of energy such as wind power could be a good alternative in these countries. This paper represents a design of a vertical axis wind turbine that will produce an output power of 883 W for 9 m/s wind speed from a synchronous generator. The project involves the design and the sizing of all the components of this wind turbine. Oil barrels will be used as blades, Filippini was one of the first ones who developed a wind turbine architecture with half cylinders. Later, some modifications were introduced which leads to Thiès rotor and C-rotor. A simple design was established to facilitate its implementation and reduce its cost. This wind turbine was designed to be used in developing countries. These facts had led to think about an uncomplicated conception and use accessible and cheap equipment which could be available all over the world. Afterwards, a scaled prototype was realized to make some tests in order to examine its efficiency, some modifications were done to observe the feedback. The procedure of the design of the wind turbine was accomplished from the beginning to the end, no step has been skipped. Later, an estimation of cost was completed. The initial cost remains lower than the cost of a wind turbine in the market. Finally, this wind turbine could be constructed easily with accessible materials. An implementation of this machine in developing countries could help people in their lives. An economical model applied to an African country shows that using one turbine could save about 1400 € per year.

scholarly journals Parking Strategies for Vertical Axis Wind Turbines

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
F. Ottermo ◽  
S. Eriksson ◽  
H. Bernhoff
Keyword(s):  
Wind Turbine ◽  
Permanent Magnet ◽  
Thrust Force ◽  
Short Circuit ◽  
Synchronous Generator ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Permanent Magnet Synchronous Generator ◽  
Torsional Oscillations ◽  
Vertical Axis Wind Turbines

Strategies for parking a vertical axis wind turbine at storm load are considered. It is proposed that if a directly driven permanent magnet synchronous generator is used, an elegant choice is to short-circuit the generator at storm, since this makes the turbine efficiently damped. Nondamped braking is found to be especially problematic for the case of two blades where torsional oscillations may imply thrust force oscillations within a range of frequencies.

scholarly journals Smart Variable Rotor of Vertical Axis Wind Turbine with Faster Cut-in Speed and Wide Range Extract Power Using Artificial Intelligent

2020 ◽  
Vol 13 (6) ◽  
pp. 500-511
Author(s):  
Jazuli Fadil ◽  
◽  
Soedibyo Soedibyo ◽  
Mochamad Ashari ◽  
◽  
...  
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Fuzzy Logic Controller ◽  
Synchronous Generator ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Wind Speed Data ◽  
Fuzzy Input ◽  
Wide Range ◽  
Speed Estimator

This paper presents the standalone type vertical axis wind turbine (VAWT) smart rotor using variable diameter rotor (VDR) in order to tap constant power and maintain cut-in wind speed. VDR is a smart variable rotor capable of operating at a low wind speed, in which the width of diameter rotor is adjustable using actuators. The VDR rotor is connected to the permanent magnet synchronous generator (PMSG) and a DC-DC boost converter. The controller of VDR rotors uses fuzzy logic controller (FLC). The FLC variable inputs are wind speed data and power output, broken down into cluster groups to determine the diameter rotor position. The wind speed data as fuzzy input are produced by wind speed estimator using artificial neural network (ANN) to maintain cut-in speed to be faster. The velocity movement of VDR is limited from 75 cm to 150 cm. The VDR extension increases by 25% when the wind speed decreases from 8 to 6 m/s to obtain consistent power at 150 Watt. The experimental of VDR system is tested at low wind speeds ranging from 1 to 8 m/s as a verification of the control system. The result showed that the VDR produced five times increase in efficiency with faster cut-in wind speed at 2.0 m/s.

Optimization of Multi-Pole Permanent Magnet Synchronous Generator Based 8 Blade Magnetically Levitated Variable Pitch Low Speed Vertical Axis Wind Turbine

2014 ◽  
Vol 492 ◽  
pp. 113-117 ◽  
Author(s):  
M. Shahrukh Adnan Khan ◽  
Rajprasad K. Rajkumar ◽  
Rajparthiban K. Rajkumar ◽  
C.V. Aravind
Keyword(s):  
Wind Turbine ◽  
Permanent Magnet ◽  
Magnetic Levitation ◽  
Synchronous Generator ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Permanent Magnet Synchronous Generator ◽  
Low Wind Speed ◽  
Trial And Error Method ◽  
Error Method

The paper presents a new Vertical Axis Wind Turbine (VAWT) design by using magnetic levitation (Maglev) and Permanent Magnet Synchronous Generator (PMSG). A lab prototype of VAWT was built which was run at low wind speed of around 3 to 5 meter per second. The bearing was replaced by Neodymium Magnet to avoid the friction which in turns reduces the losses and increase the efficiency. A Prototype version of PMSG was built which could generate voltage from the turbine even in low rotational speed. Suitable turbine blade angle was also determined using trial and error method.

scholarly journals A 225 kW Direct Driven PM Generator Adapted to a Vertical Axis Wind Turbine

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
S. Eriksson ◽  
H. Bernhoff ◽  
M. Leijon
Keyword(s):  
Wind Turbine ◽  
High Efficiency ◽  
Synchronous Generator ◽  
Experimental Tests ◽  
Vertical Axis ◽  
Magnetic Flux Density ◽  
Vertical Axis Wind Turbine ◽  
Electromagnetic Model ◽  
Electromagnetic Simulations ◽  
Application Requirements

A unique direct driven permanent magnet synchronous generator has been designed and constructed. Results from simulations as well as from the first experimental tests are presented. The generator has been specifically designed to be directly driven by a vertical axis wind turbine and has an unusually low reactance. Generators for wind turbines with full variable speed should maintain a high efficiency for the whole operational regime. Furthermore, for this application, requirements are placed on high generator torque capability for the whole operational regime. These issues are elaborated in the paper and studied through simulations. It is shown that the generator fulfils the expectations. An electrical control can effectively substitute a mechanical pitch control. Furthermore, results from measurements of magnetic flux density in the airgap and no load voltage coincide with simulations. The electromagnetic simulations of the generator are performed by using an electromagnetic model solved in a finite element environment.

scholarly journals Skewing angle magnet and coil reduced starting torque in a permanent magnet synchronous generator for a small vertical axis wind turbine

2020 ◽  
Author(s):  
Priwan Pongwan ◽  
Kusumal Chalermnayanont ◽  
Mintra Trongtorkarn ◽  
Suppachai Jina ◽  
Montri Luengchavanon
Keyword(s):  
Wind Turbine ◽  
Permanent Magnet ◽  
Synchronous Generator ◽  
Vertical Axis ◽  
Vertical Wind ◽  
Vertical Axis Wind Turbine ◽  
Skew Angle ◽  
Low Speed ◽  
Magnet Coil ◽  
Starting Torque

Abstract. This work investigated the effects of changing the skewing angle of a magnet coil on starting torque in a permanent magnet generator (PMSG) fitted in a low speed vertical wind turbine. The optimal skew angle of the magnet-coil was found to be 15–0 (degrees), generating 1.22 (N-m) starting torque and 295.40 (W) compared with a skew angle of 0–0 (degrees). This skew angle reduced starting torque and power by 5.43 % and 1.96 %, respectively. A Savonius and H-Darrieus stacked turbine blade operated at a wind speed of 1.90 m/s and 1.31 N-m torque. This blade was used in a fully operational vertical wind turbine, was connected to the PMSG that can cut-in speed of 2.1 m/s. It was concluded that a 15–0 (degree) skewing angle magnet-coil can be applied to a low speed vertical wind turbine.

Sign in / Sign up

Export Citation Format

Share Document