1 Implementation of Permanent-Magnet Wind Generator for Battery Charging Dr. Zar Ni Aung #1 , Dr.Thi Thi Soe *2 # Metallurgical Research and Development Centre Ela, Nay Pyi Taw, Myanmar 1 znaung579@gmail.com * Metallurgical Research and Development Centre Ela, Nay Pyi Taw, Myanmar 2 thithisoe81@gmail.com Abstract—Due to recent development in permanent magnet materials, especially Nd-Fe-B, high efficiency PM generators can be manufactured for wind applications. This paper deals in particular with the study of battery charging for 3kW permanent magnet wind generator. The generator that is being used will be a 16-pole permanent magnet generator rated at 3 kW and using NdFeB for the field excitation. The generator will be directly coupled to the wooden blades. In this paper, detailed design, optimization, construction and tested of radial-flux low speed rare-earth high energy permanent- magnet electrical machines are investigated. The major goal of this paper is to study the characteristics of the wind turbine and 3kW permanent magnet generator design and analyze the charging system by changing the 3Φ winding connection of permanent magnet generator to be charged such as star connection, delta connection and three series connection (4 parallel, 4 series, 2 series-2 parallel) respectively. Keywords— 3kW permanent magnet generator, 3Φ winding connection (Y, ∆ , 3 series), 4 nons-12 V battery (4parallel, 4 series, 2 series- 2 parallel battery) Introduction During the last decades, great attention has been to the pollution-free renewable energy to be an alternative source for oil, natural gas, Uranium and coal sources that will last no longer than another 100 years. Wind energy sources that have been widely used in electricity generation. The fact is that the cost of energy supplied by wind turbines is continuously decreasing. Nowadays, electrical energy produced by a wind turbine has many uses. This paper analyses the properties of the system components of wind generation. The effects of parameter variation and the system configuration on the system performance are investigated. One type of wind powered battery charging will be explored in this paper. It consists of 3 kW wind turbine driving a permanent magnet generator and operates at variable speed connected to a battery via a rectifier. The characteristic of the system depends on the wind turbine, the generator, and system configuration. By understanding the basic characteristic of the components, many of the performance limitations of the system can be remedied and the optimization of the system can be explored. The approach considered is to insert a load controller between the generator and the load. The physical diagram of the system under investigation can be shown in Fig.1. The permanent magnet generator is directly connected to the wind turbine and its output varies in frequency and voltage. The output is rectified to form a DC link and an inverter converts the power to AC for the load.