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Recently a novel electric hammer driven by tubular permanent magnet linear synchronous motor (TPMLSM) has arouse great interest among researchers in the field of deep drilling for its distinctive advantages compared with hydraulic and pneumatic hammers. The working temperature in deep down-hole is relatively high, so the research of the influence of high temperature in deep hole on the electromagnetic...
Application of Permanent Magnet Synchronous Motor (PMSM) has been increasingly popular in Electric Vehicle (EV) area since cost-effective magnetic materials were recently discovered. This paper mainly presents numerical calculation and experimental measurement of core loss of PMSM at various frequencies among 50Hz, 100Hz, 200Hz and 400Hz. A novel design strategy of PMSM will be described. The motor...
The position and speed detection of maglev train is critical to train control system. The common methods of speed measurement include speed sensor measurement and speed sensorless measurement. The use of sensorless method can significantly reduce costs and it's not influenced by various environmental factors. In this paper, a high frequency pulsating voltage injection method is proposed for the PMLSM,...
This paper proposes a model predictive torque-vector control (MPTVC) scheme for four-switch three-phase inverter (FSTPI)-fed permanent magnet synchronous motor (PMSM). A cost function consist of a new constructed reference torque-vector is designed. Thus, the control of the FSTPI-fed motor drive with the capacitor voltages dc offset suppression can be ensured by only tracking the reference torque-vector...
With the high power density and the simple structure, complementary and modular linear flux-switching permanent magnet (CMLFSPM) motor is especially suitable for urban rail transit application. A high dynamic performance of the system is significant in transportation system. Compared to the flux-oriented control, the Direct Thrust Control (DTC) method has fast torque response and is scarcely influenced...
This paper presents a new speed control system for a flux-modulated permanent-magnet (FMPM) in-wheel motor. It is based on deadbeat-direct torque and flux control (DB-DTFC) to reduce the torque ripple and improve the steady performance compared with conventional SVPWM-DTC system. DB-DTFC calculates the control input of next control period so that a new stator current observer is proposed to predict...
This paper provides a solution for design of permanent magnet (PM) assisted synchronous reluctance machine (PMa-SynRM). Unlike interior PM machines, the PMa-SynRM is substantially a SynRM with a dominant reluctance torque. PMa-SynRMs are often designed by direct embedding magnets in a SynRM rotor to improve the performance over the original SynRM. However, the PM arrangements being more effective...
This paper presents a rotor position estimated method of a five-phase IPM motor based on high-frequency sinusoidal voltage injection to improve the sensorless control system performance at low speed for electric vehicles. The high-frequency sinusoidal voltage is injected into the estimated rotor reference frame. The estimated rotor position and speed are obtained by detecting and processing high-frequency...
This paper introduces a submerged LNG (liquefied natural gas) pump cryogenic permanent magnet synchronous motor (PMSM). A 22kW/6000rpm prototype is designed for low temperature operation at −161°C. The influence of temperature on magnetic and electric parameters of materials is analyzed, and a coupled simulation model of electromagnetic-fluid-thermal-stress field is established. On this basis, the...
A Flywheel Energy Storage System (FESS) can solve the problem of randomness and fluctuation of new energy power generation. The flywheel energy storage as a DC power supply, the primary guarantee is to maintain the stability of output voltage in discharge mode, which will cause the variation of motor internal magnetic field. In this paper, taking a flywheel energy storage permanent magnet motor as...
Linear permanent magnet (LPM) machines are used in various fields. In order to generate high thrust force, the size of LPM machine becomes large. Then, magnetic geared linear motor (MGLM) has been proposed. MGLM realizes a high thrust force and downsizing. This paper proposes a new design of MGLM. In addition, two designs of magnetization direction, axial direction and radial direction, are compared...
When designing a very-high-speed (VHS) machine, it is crucial to evaluate the windage losses accurately, because they are an important part of the total losses. It is therefore important to validate a reliable model, further used for the design and optimization of the motor. In this paper, an empirical windage loss model has been compared to measurements on a motor running up to 155 krpm in a pressure...
A novel tubular transverse-flux flux-reversal permanent magnet linear motor (TTFFRPMLM) for long stroke applications is designed and analyzed in this paper, which not only has the low cost advantage of the existing flux-reversal motor (FRM) by combining both PMs and armature coils in short primary, but also can address the problem of complicated structure of the existing transverse-flux motor (TFM)...
In this paper, a method of deep learning is built to reduce the needed time on performance analyze and optimization of permanent magnet synchronous motor (PMSM). The analysis of the electromagnetic speed, torque and efficiency of PMSM is carried on with Finite Element Method (FEM), which is 8 pole-pairs, 48 stator slots and 195mm of stator external diameter. FEM model of PMSM is established, and the...
In this paper, a novel DC-link voltage variation method using a high-efficiency dc-dc converter for the three-phase-inverter of IPMSM(Interior Permanent Magnet Synchronous Motor) is proposed. The proper variation method of DC-link voltage is needed to reduce the torque ripple of IPMSM and, switching loss of the inverter. Also, to meet the high-efficiency requirement of the DC-DC converter with the...
In-wheel motor system is recognized as the ideal drive system for electric vehicles. To reduce mechanical shock and electromagnetic impulsion brought by rigid connection between hubs and motor, our group proposed a novel permanent bistable electromagnetic clutch which flexibly connecting the motor and hubs. In this paper, several power supply schemes for the clutch are proposed and compared, then,...
The mathematical models of the permanent magnet synchronous motor (PMSM) are complex systems, characterized by high coupling, nonlinearity, parameter variation and they are highly influenced by disturbances. Conventional PID control method cannot make the system set value tracking and interference suppression both in optimal. In this paper, a two-degree-of-freedom (2DOF) PID controller with a set-valued...
This paper considers the minimizing of eddy current losses of PM motor through the proper choice of the magnet material, rotor magnet design and the comparison analysis between with and without rotor segmentation. Through 3D analysis and the experiment, it is shown that the magnet segmentation has the effectiveness of eddy current loss reduction especially for the variation of load condition.
Interior permanent magnet synchronous motor (IPMSM) has stronger reluctance torque and mechanical strength and better dynamic performance, being highly suitable for high-speed operation. Practically, the performance of IPMSM is dramatically influenced by various rotor structures. This paper studies a fractional-slot IPMSM and it is analyzed that how those parameters, such as the number of permanent...
With the development of technology, The power density of permanent magnet synchronous motor application in aerospace is increasing rapidly. The integration of the machine with the power electronic converter and control system has many advantages such as high power density, high reliability and small size, etc. However the cooling design of it is challenging [1]. In this paper, the optimal design of...
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