tailieunhanh - Recent Developments of Electrical Drives - Part 18

Recent Developments of Electrical Drives - Part 18. The book stating the recent developments of electrical drives, can be useful for engineers and researchers investigating and designing electrical and electronic devices as well as for students and young researchers dealing with electrical and electronic engineering, computer sciences (advanced computer modelling, sophisticated control systems with artificial intelligence tools applied, optimal design bye use of classical and genetic algorithms employed), applied mathematics and all the topics where electromagnetic, thermal, mechanical phenomena occur | 162 Hanamoto et al. Table 1. Specifications of the tested motor Items Value Rated power W rated maximum Rated torque Nm rated maximum Rated current Arms rated maximum Inverter voltage V Armature resistance Q d-axis armature inductance mH q-axis armature inductance mH Number of pole pairs 86 355 200 93 36 2 Figure 6. Experimental results using speed sensor. speed sensor. Fig. 7 shows the results using the proposed modified flux linkage observer when the same condition. From this figure the modified flux linkage observer gives almost the same results as them measured by a sensor. As a result our proposed methods are effective to the sensorless control of . Fig. 8 illustrates the performance in the steady state. The measured and estimated rotor position of the middle speed and high-speed operation are shown. From the figure the accuracy estimation results are obtained even if the high-speed region. Fig. 9 show the output of the estimation error correct function Ky. From this figure Ky is decreased when the effective current irms is increased. And Ky is also the function of the motor speed. II-2. Sensorless Control Using Modified Flux Linkage Observer 163 b w 1500 min-1 Figure 8. Measured and estimated rotor positions in the steady state. Conclusion In this paper we proposed the modified flux observer with the estimation error correct function for the sensorless control method of . The validity of the proposed method is verified by experiments. References 1 T. Tamamura Y. Honda S. Morimoto Y. Takeda Synchronous Reluctance Motor When Used Air-Condition Compressor Motor A Comparative Study IPEC-Tokyo 2000 2000 pp. 654-659. 2 T. Senju T. Shingaki K. Uezato Sensorless vector control of synchronous reluctance motor with disturbance torque observer IEEE Trans. Ind. Electron. Vol. 48 No. 2 pp. 402-407 2001. 3 S. Shinnaka Mirror-phase characteristics of synchronous reluctance motor and salient-pole orientation methods for sensorless .