2024年3月15日 · As an essential part of high-temperature superconducting (HTS) magnetic levitation, the irregularity of the permanent magnetic guideway (PMG) affects the safe and stable operation of the vehicle. However, measuring the geometric irregularity and the joint size is difficult because of the existing PMG surface covering protection and iron filings.

2023年10月31日 · This paper presents a dual-winding permanent magnet generator (PMG) system with integrated dual-channel controller to meet the requirements of high power density, high reliability, and high output pe...

2023年12月1日 · Through integrating the validated analytical magnetic force model into the multi-objective particle swarm optimization algorithm, the Halbach-type permanent magnetic guideway (PMG) configurations are optimized in terms of high levitation force and low lateral force.

In this Letter, we demonstrate a four-channel -λ∕4 shifted Bragg grating array with highly uniform channel spacing, using the equivalent phase-shift method and state-of-the-art 300 mm CMOS fabrication processes.

2020年4月27日 · Based on the vector control theory and double closed-loop control, the sliding mode control (SMC) method with the improved exponential rate reaching law (IERRL) is proposed in the voltage loop of the PMG system. The switching surface is designed with an integral term of state variable to suppress chattering and increase response speed.

*Abstract -- This paper introduces a new analytical method for performing the output torque calculations of an interior permanent magnet synchronous motor (IPMSM) including both permanent magnet and reluctance torque components.

Abstract—Through rigorous process, electrical, and optical sim-ulations, we develop a new silicon depletion-mode vertical p-n junction phase-modulator implemented in Mach–Zehnder mod-ulator configuration, enabling an ultralow measured VπL of only ∼1 V ·cm.

电磁波的波长与频率之间存在反比关系，即波长越长，频率越低；波长越短，频率越高。这种关系可以用公式表示为v=fλ，其中v是波速，f是频率，λ是波长。在电磁波的传播过程中，波速是不变的，所以波长和频率的乘积是一个常数。

2020年11月5日 · 本文介绍Pollaczek-Khintchine (P-K)公式，并探讨其在定长服务时间M/D/1模型及爱尔朗服务时间M/Ek/1模型中的应用。

2019年5月14日 · 逸出功，是指使一个电子立即从固体表面逸出，所需提供的最小能量。 黄金分区率，约等于 0.618…… 表示体积分数，符号为φ，是指分散质的体积/分散剂的体积。 例如白酒标注的度数所谓的"°"其实就是指的白酒中酒精的体积分数。 这些重要的参数可以帮助喜欢学习的人更好的去学习知识。 文章浏览阅读1.9w次，点赞9次，收藏21次。