Design and Development of a Low-Speed Horizontal Permanent-Magnet Synchronous Generator

Siriporn Testhong; Yamonporn Dechaboon; Sudarat Theerapisit; Chainuson Kasetphongsarn; Supphawut Benjakul

Siriporn Testhong Nakhon Si Thammarat Rajabhat University
Yamonporn Dechaboon Nakhon Si Thammarat Rajabhat University
Sudarat Theerapisit Nakhon Si Thammarat Rajabhat University
Chainuson Kasetphongsarn Suratthani Rajabhat University
Supphawut Benjakul Nakhon Si Thammarat Rajabhat University

Keywords: low-speed generator, synchronous speed, horizontal permanent-magnet type, voltage, current

Abstract

This research aims to design, construct, and test a low-speed, horizontally mounted permanent-magnet synchro-nous generator. The prototype was fully fabricated from newly manufactured components and evaluated at operating speeds ranging from 100 to 500 rpm. The test results show that the generator can produce a maximum electrical power output of 1 kW, with the three-phase output voltage increasing proportionally with the rotational speed. Under practical test conditions, the generator delivered an electrical power of approximately 250 W. In addition, the voltage and current exhibited a phase angle of 120 electrical degrees, confirming proper three-phase operation. These findings indicate that the developed generator operates effectively and is well suited for low-speed applications.