Open AccessEliminating starting hesitation for reliable operation of switched reluctance motor without machine parameters for light electric vehicle applications
Author(s) -
Jamil Muhammad Usman,
Kongprawech Waree,
Chayopitak Nattapon
Publication year - 2019
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2018.5938
Subject(s) - control theory (sociology) , switched reluctance motor , rotor (electric) , electromagnetic coil , stator , position (finance) , torque , computer science , position sensor , voltage , electric motor , interpolation (computer graphics) , engineering , physics , electrical engineering , artificial intelligence , motion (physics) , control (management) , finance , economics , thermodynamics
In this study, an initial rotor position estimation at standstill condition is presented for reliable operation of switched reluctance motor (SRM) without initialising machine parameters for light electric vehicle (LEV) applications. The prime objective of this method is to startup an SRM without using the mechanical position sensor, and eliminate the starting hesitation and starting jerk issues from standstill condition. In the proposed method, the initial rotor position at standstill is determined by injecting a single pulse dc voltage simultaneously into all stator phase windings for a very short period (microsecond). The obtained current envelope data is then used to calculate the initial rotor position with the quadratic polynomial interpolation technique without any prior knowledge of other motor parameters. The experimental results for a 3.5 kW, 6/4 SRM are provided to substantiate the overall good performance. The developed system can be considered as a strong candidate for high precision LEV applications.