This paper presents a permanent magnet synchronous motor (PMSM) servo drive system for high speed flat industrial sewing machine. In order to satisfy the special function of sewing machine, several approaches are applied in this servo system: Using
The Dictionary of Pure and Applied Physics (DPAP) is one of three physics dictionaries being published by CRC Press LLC, the other two being the Dictionary of Material Science and High En- ergy Physics and Dictionary of Geophysics, Astrophysics and
Chapter 1 Introduction to Amateur Radio 1 Who Can Become a Ham Radio Operator? 1 New Avenues into Amateur Radio 2 About Amateur Radio 2 A History of Amateur Radio 3 Early pioneers 3 Beginning of amateur radio 5 First licenses for amateur radio opera
相控阵天线讲的深入浅出，很有参考价值 1 Radiation 1 1.1 The Early History of Electricity and Magnetism 1 1.2 James Clerk Maxwell, The Union of Electricity and Magnetism 8 1.3 Radiation by Accelerated Charge 10 1.4 Reactive and Radiating Electromagnetic Fields 18 Refer
AK09915 is 3-axis electronic compass IC with high sensitive Hall sensor technology. Small package of AK09915 incorporates magnetic sensors for detecting terrestrial magnetism in the X-axis, Y-axis, and Z-axis, a sensor driving circuit, signal amplif
The magnetic and resistances of slightly Dy doped LaMnO3 solid solutions，LIU Hao，ZHANG Hongguang，The magnetism of Dy-doped LaMnO3 solid solutions synthesized using sol-gel method was measured and explained by the analysis of local structure. The satu
纳米固体磁性，孙长庆，，Incorporating the recent bond order-length-strength correlation mechanism [Sun et al., Acta Mater 2004;52:501] into the Ising convention and the Brillouin function has enabled the
