A Sensorless Drive with Inductance Estimation for Switched Reluctance Motors

• Main Authors: Hsin-Chang Tu, 杜信璋
• Other Authors: 蘇武昌
• Format: Others
• Language: en_US
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/11269689093095242588

碩士 === 國立中興大學 === 電機工程學系所 === 96 === The purpose of this thesis is to develop a sensorless positioning method for a four-phase switched reluctance motor so as to fully replace the optical encoder in the driving mechanism. We install two current sensors in the dual-forward converter. By substituting the current information into the flux linkage dynamics, we obtain the instantaneous inductance value, so that the rotor position can be virtually estimated. We use a digital signal processor for computing the system parameters, which are then fed into the inductance computing algorithm. It is found that the inductance information alone is sufficient for driving purpose. The idea is confirmed by computer simulations as well as experimental data.