Novel Electromagnetic Rotor Position Sensor for Aerospace Brushless DC Machine
In order to implement aerospace brushless DC machine servo control system in a high-temperature hostile environment, a novel electromagnetic rotor position sensing device was put forward. Concentrated excitation windings and detection ones were alternately mounted on the stator teeth. The rotor cylinder outer surface was notched at the corresponding positions of the magnetic S poles on the machine rotor. With the magnetic field excited by a high frequency sinusoidal current, the detected signals were modulated by machine rotor position, as the total mutual inductance between one detection winding and all the excitation ones varied as a function of the sensor rotor position. With all magnetic iron cores laminated from new soft magnetic alloy ultra-thin sheet, the excitation current frequency may be increase to 100 KHz. Moreover a linear model and a magnetic-equivalent-circuit model were set up and the sensor geometry parameters were optimized based on the later. A finite element analysis was done in ANSYS software program and an experiment system was also built up. Both the simulation and the experiment results revealed the validity and reliability of the whole scheme.
brushless DC Machine rotor position aerosapce magnetic-equivalent-circuit finite element simulated annealing algorithm
Qiang Fu Bo He
School of Aeronautics Northwestern Polytechnical University Xian Shannxi, China The State Key Laboratory of Electrical Insulation and Power Equipment, Xian Jiaotong University Xi
国际会议
太原
英文
52-57
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）