Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Inverter Losses Reduction for Rectangular Drive BLDCM using Synchronous Rectification
Authors Myung-Joon Nam ; Hag-Wone Kim ; Kwan-Yuhl Cho
DOI 10.6113/TKPE/2016.21.2.117
Page pp.117-125
ISSN 1229-2214
Keywords BLDCM; Synchronous rectification; Unified PWM; Losses analysis
Abstract In this paper, the inverter switch losses of BLDC motor for three types of PWM methods and power devices were analyzed. When the BLDC motor is driven at low currents, the inverter switch losses for MOSFET are low because MOSFET operates like resistance. However, the inverter switch losses for IGBT are higher than MOSFET due to its large turn-off losses. Moreover, synchronous rectification switching method is adaptable because MOSFET has 2-channel. So, MOSFET can be driven with more low impedance and losses. For low power inverter with MOSFET, the power losses of unified PWM are lower than that of unipolar and bipolar PWM. Proposed method and losses analysis results are verified by examination and simulation using Matlab/Simulink.