Abstract：In rotor flux oriented speed sensorless vector control system, the steady state equations based synchronous angular speed deduction method is both simple and cost saving to obtain the magnetic field position. For the disadvantage of inaccuracy in transient state, a method of angle error acquisition between practical and estimated magnetic field is proposed by means of current injection in this paper. Inserting sine current of some frequency and amplitude in the direction of the estimated magnetic field, when the estimated angle deviates from the actual one, the electromotive force of motor will contain a component related with the angle error according to the mechanical characteristics and electromagnetic relation of motor. The angle error can be effectively compensated by extracting the component and designing a magnetic field tracking controller so that estimated magnetic field position can fast track the practical one. Applied in speed sensorless low speed drive system simulation, the method makes satisfactory results and has some application prospects.
邓歆, 赵金. 异步电机无速度传感器控制系统中磁场跟踪控制器设计[J]. 电工技术学报, 2010, 25(5): 82-87.
Deng Xin, Zhao Jin. Magnetic Field Tracking Controller in Speed Sensorless Induction Motor Drive. Transactions of China Electrotechnical Society, 2010, 25(5): 82-87.
[1] 刘军锋. 定子磁场定向无速度传感器系统研究与开发[D]. 武汉：华中科技大学, 2006. [2] 徐静, 阮毅, 陈伯时. 异步电机按定子磁场定向的转差频率控制[J]. 电机与控制学报, 2003, 7(1): 1-4. [3] Kubota H, Matuse K, Nakano T. DSP based speed adaptive flux observer of induction motor[J]. IEEE Transactions on Industry Applications, 1993, 29(2): 344-348. [4] Hinkkanen M. Analysis and design of full order flux observers for sensorless induction motors[J]. IEEE Transactions on Industrial Electronics, 2004, 51(5): 1033-1040. [5] Parasilti F, Petrella R, Tursini M. Adaptive sliding mode observer for speed sensorless control of induction motors[C]. Thirty-Fourth IAS Annual Meeting, 1999: 2277-2283. [6] Zhang Y, Chang X J, Utkin V. Sensorless sliding mode control of induction motors[J]. IEEE Transactions on Industrial Electronics, 2000, 47(6): 1286-1297. [7] Leppanen V M, Luomi J. Speed sensorless induction machine control for zero speed and frequency[J]. IEEE Transactions on Industrial Electronics, 2004, 51(5): 1041-1047. [8] Leppanen V M, Luomi J. Rotor flux angle tracking controller for sensorless induction motor drives[C]. IEMDC, 2002: 856-863. [9] Leppanen V M, Luomi J. Effect of equation of motion on low frequency impedance of induction motors-an approach for rotor flux angle estimation[C]. EPE-PEMC 2002. CD-ROM. [10] Leggate D, Kerkman R J. Pulse based dead time compensator for PWM voltage inverters[J]. IEEE Transactions on Industrial Electronics, 1997, 44(2): 191-197.
2010, Vol. 25 
