Magnetic pole position detection is the core of closed-loop control system permanent magnet linear synchronous motor (PMLSM), and its estimation accuracy directly affects performance dynamic response speed. In order to solve problem increased error magnetic caused by field distortion at end PMLSM while also considering cost hardware, paper uses four Hall sensors as components adopts an optimize...

Flexible electronic printing technology is a scientific that uses an “ink” material with conductive, dielectric, or semiconductor properties printed on flexible web substrate to achieve precise preparation of devices, which are widely used in information, energy, medical, and military fields. In the process electron webs under complex working conditions, moving will experience substantial unsta...

Abstract Recently, graphene-patch antennas have been widely used in communication technology, especially THz applications due to the extraordinary properties of graphene material. Herein, a graphene-based rectangular microstrip patch antenna is designed on an FR4 substrate material (ɛ r = 4.3). A single and double-faced superstrate MTM placed upon radiating for di erent purposes, such as enhanc...

RF breakdown is one of the major factors determining performance of high power rf components and rf sources. RF breakdown limits working power and produces irreversible surface damage. The breakdown limit depends on the rf circuit, structure geometry, and rf frequency. It is also a function of the input power, pulse width, and surface electric and magnetic fields. In this paper we discuss multi...

In this paper, we have modeled and simulated the magnetic field of conductor by using finite element method, which is incorporated in Ansoft Maxwell software. Modeling simulation are done for a two conductors located at small distance between them. Our study based on method elements Biot-Savart law calculating depending from conductor. We observed that calculated values good accordance with [1]...

An equivalent circuit model for predicting the frequency response of a square ring slot frequency selective surface (SRS-FSS) for normal incidence is described. The proposed FSS consists of an array of square patches centered within a wire grid. The presented circuit model is formed by the impedance of the wire grid that is parallel with the impedance of the patch array, also the mutual couplin...

In this paper, a compact, flexible Vivaldi antenna is designed, and an array of nine identical antennas type used as microwave breast imaging model to detect cancerous tumors in the multilayers phantom presented paper. The nine-antenna measure backscattering signal phantom, where one acts transmitter other eight act receivers scattered signals. Then, second receivers, so on till we have gone th...

permanent magnet synchronous generators (pmsgs) are novel generators which can be used in high-performance wind farms. high efficiency and flexibility in producing electricity from variable rotation make them good candidate for wind power applications. furthermore, because these kinds of generators have no excitation winding, there is no copper loss on rotor; hence, they can operate at high pow...

Aiming at the impact of heat generation and temperature rise on driving performance a permanent magnet (PM) motor, taking PM in-wheel motor (IWM) for electric vehicles as an object, research is conducted into distribution electromagnetic–thermal effect cooling structure optimization. Firstly, coupling model considering electromagnetic harmonics established using subdomain Bertotti’s iron loss s...

Surface acoustic wave (SAW) technology has been featured in numerous publications for more than a decade because of the performance advantages and design flexibility. With the increasing of the frequency, the electrical effects become more important. The accurate prediction of the frequency response relies on a combination of good acoustic modeling techniques, rigorous die and package parasitic...