Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title ANN Sensorless Control of Induction Motor with AFLC Controller
Authors Jung-Sik Choi ; Jae-Sub Ko ; Dong-Hwa Chung
Page pp.224-232
ISSN 1229-2214
Keywords Induction Motor Drive; AFLC; ANN; BPA; Speed Estimation
Abstract In this paper, in order to develop a simple and high efficient ballast without an external ignitor, a half-bridge type ballast with a coupled inductor and a frequency controlled synchronous rectifier is proposed. The internal LC resonance of the buck converter is used to generate a high voltage pulse for the ignition, and the coupled inductor filter is used for steady state ripple cancellation. Also, a synchronous buck converter is applied for the DC/DC converter stage. In order to improve the efficiency of the ballast, a frequency control method is proposed. This scheme reduces a circulation current and turn off loss of the MOSFET switch on the constant power operation, which results in increase of the efficiency of the ballast system about 4 %, compared to a fixed frequency control. It consists a 2-stage version ballast with a PFC circuit. The results are verified with hardware experiments.