Open AccessSensorless Sine‐Wave Controller IC for PM Brushless Motor Employing Automatic Lead‐Angle Compensation
Author(s) -
Kim Minki,
Heo Sewan,
Oh Jimin,
Suk JungHee,
Yang Yil Suk,
Park KiTae,
Kim Jinsung
Publication year - 2015
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.15.0115.0329
Subject(s) - control theory (sociology) , sine wave , controller (irrigation) , dc motor , motor controller , compensation (psychology) , computer science , power (physics) , engineering , voltage , electrical engineering , physics , control (management) , psychology , agronomy , quantum mechanics , artificial intelligence , psychoanalysis , biology
This paper presents an advanced sensorless permanent magnet (PM) brushless motor controller integrated circuit (IC) employing an automatic lead‐angle compensator. The proposed IC is composed of not only a sensorless sine‐wave motor controller but also an isolated gate‐driver and current self‐sensing circuit. The fabricated IC operates in sensorless mode using a position estimator based on a sliding mode observer and an open‐loop start‐up. For high efficiency PM brushless motor driving, an automatic lead‐angle control algorithm is employed, which improves the efficiency of a PM brushless motor system by tracking the minimum copper loss under various load and speed conditions. The fabricated IC is evaluated experimentally using a commercial 200 W PM brushless motor and power switches. The proposed IC is successfully operated without any additional sensors, and the proposed algorithm maintains the minimum current and maximum system efficiency under 0 N·m to 0.8 N·m load conditions. The proposed IC is a feasible sensorless speed controller for various applications with a wide range of load and speed conditions.