Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Sensorless Drive of Brushless DC Motors Using an Unknown Input Observer
Authors Tae-Sung Kim ; Ji-Su Ryu ; Dong-Seok Hyun
Page pp.65-71
ISSN 1229-2214
Keywords BLDC Motor; Sensorless; Unknown Input Observer
Abstract In this paper, a DC and small-signal AC modeling for the active-clamp, full-bridge boost converter is described. Based on the operation principle, the ac part of the converter can be replaced by a dc counterpart. Then, a conceptual equivalent circuit is derived by rearranging the switches. The equivalent circuit for this converter consists of CCM(Continuous conduction mode) boost and DCM(Discontinuous conduction mode) buck converter. The analyses for the equivalent CCM boost and DCM buck converter are done using the model of PWM switch. The theoretical modeling results are confirmed through experiment or SIMPLIS simulation.