Permanent-magnet synchronous motors (PMSMs) can be used in the applications with high requirements to energy saving and performance due to its high power density, high efficiency, high reliability, and easily implemented field-weakening operations [1-9]. The high-performance control of PMSM requires accurate rotor position information.

Abstract—A nonlinear observer for surface-mount permanent-magnet synchronous motors (SPMSMs) was recently proposed by Ortega et al. (LSS, Gif-sur-Yvette Cedex, France, LSS Internal Rep., Jan. 2009). The nonlinear observer generates the position estimate θˆ via the estimates of sinθ and cosθ. In contrast to

the design of surface permanent magnet synchronous mo-tor (SPMSM), and two designed models are analyzed by the finite element method (FEM). The effectiveness of the pro-posed system is discussed by evaluating the results of the analyses. 2. Design Assist System for PMSM A flowchart for the proposed design assist system is shown in Fig.1.

Permanent magnet Vernier motors (PMVMs) possess the advantage of high torque density for high-performance applications. However, the low power factor challenge makes it unacceptable for direct-drive applications. A lack of accurate modeling method based on the motor sizing law, i.e., air-gap flux density, linear current density, …

magnetic field. A rotor has permanent magnets, which produce their own magnetic field. The motor rotates due to torque produced when these two fields interact. PMSMs are classified into two categories depending on the rotor construction: 1. Surface Mount: The magnets are mounted on the surface of the rotor. They need special profiling to get

This paper develops and analyzes a parametric model for simulating healthy and faulty surface-mounted permanent magnet synchronous motors. It allows studying the effects of stator winding interturn short-circuit faults. A relevant feature of the developed model is that it deals with spatial harmonics due to a nonsinusoidal rotor permanent ...

The prototype machine is an axial-flux permanent-magnet machine with a two-rotor–one-stator configuration. The nominal power of the machine is 300 W and the nominal rotational speed is 500 rpm. The magnets are neodymium iron boron magnets. Twelve magnets are mounted on the rotor surface and 12 magnets buried on the rotor …

Abstract: This paper proposes an improved method for the estimation of position, velocity, and disturbance torque in a surface permanent-magnet (SPM) machine self-sensing (position sensorless) drive that uses high-frequency (HF) voltage injection. SPM machines traditionally do not have enough position-dependent signals …

The appositeness of permanent magnet synchronous motors (PMSMs) has been boosting in traction applications due to their high energy density, compact size and high torque to weight ratio. A novel and step-by-step design of medium power, high speed, surface PMSM, suitable for e-bus or e-truck applications, with suppressed torque …

An analytical method for calculation of no-load magnetic field distribution in the slotted airgap of a surface permanent magnet synchronous motor has been presented. The method involves the solution of the governing field equations in polar coordinates in the annular airgap region of a slotless motor in which the magnets are assumed to have ...

In this paper, the external rotor SPM machines are optimized for electromagnetic and thermal performance under the space limitation. By improving the …

The permanent magnet of order 3 starting from the right side in Fig. 1 is selected with the magnetization direction from bottom to top along the paper surface. Obviously, the permanent magnet only undergoes reversible demagnetization as the velocity is less than 9 m/s. Download : Download high-res image (704KB) Download : …

Improving the uniformity of shape and length, and minimize surface oxidation, could allow to reach 200 kJ/m 3 (Vazquez, 2015, chap. 21, Soft chemistry nanowires for permanent magnet fabrication). While it is clear that the performance of sintered NdFeB magnets cannot be beaten by nanowires, applications may exist for moderate performance and ...

This paper provides a thorough, parametric comparison of axial and radial flux coaxial magnetic gears with surface-mounted permanent magnets. While both topologies share similar operating principles and can achieve comparable shear stresses, they exhibit different scaling trends with respect to key design parameters. Both topologies' …

Magnet Structure of Radial Flux Permanent Magnet Generator for Cogging Torque Reduction And Low Torque Ripple", Kyungnam University, pp. 1– 9, Korea. [6] Alfredo R. Munoz, Feng Liang, Michael W Degner, "Evaluation of Interior PM and Surface PM Synchronous Machines with Distributed and

Design and Magnetic Noise Reduction of the Surface Permanent Magnet Synchronous Machine Using Complex Air-Gap Permeance. Abstract: Nowadays, developing electric …

The type of motor in which permanent magnets are attached to the circumference of the rotor is called the SPM (surface permanent magnetic) type. STU Other terms. Separate-Field Motor; Single-phase Motor; SPM (Surface Permanent Magnetic) Stator; Squirrel-cage Rotor Type Induction Motor; Shaft; Switched Reluctance Motor; Skew; Stepping Motor

Permanent magnet synchronous motors (PMSMs) have found widespread use in industrial production, electric vehicles, aerospace, and other industries thanks to the development of high-quality rare-earth permanent magnetic materials [1,2] and power electronics technology [3,4].Generally, the use of PMs in electrical machines has some …

Keywords: permanent magnet synchronous motors (PMSM); sensorless control; review 1. Introduction In recent decades, the use of the permanent magnet synchronous motor (PMSM) has become increasingly widespread, both for medium-power industrial applications and for electric traction drives. This type of motor is characterized …

MAGNET ROTOR CORE Fig. 1. Structure of the permanent magnet synchronous machine [3] The stator carries a three-phase winding, which produces a near sinusoidal distribution of magneto motive force based on the value of the stator current. The magnets are mounted on the surface of the motor core. They have the same role as the I

1 Introduction. Recently, permanent-magnet (PM) machines have been widely used in commercial, industrial, agricultural and military products because of their higher power density, torque density, efficiency, lower vibration and noise [1-4].Air gap magnetic field has an important influence on the performance of PM machines, such as …

Types. Depending on how magnets are attached to the rotor and the design of the rotor, permanent magnet synchronous motor can be classified into two types: Surface permanent magnet synchronous motor (SPMSM) Interior permanent magnet synchronous motor (IPMSM). SPMSM mounts all magnet pieces on the surface, and …

The purpose of this Insight is to explain permanent magnets in a way that is in agreement with advanced textbooks on the subject, and that emphasizes the results in these textbooks without requiring nearly the mathematics that these textbooks use. The magnetic fields from a permanent magnet can readily be und…

Abstract: This paper introduces a topology optimization method for a surface permanent magnet (SPM) motor with high torque density suitable for air mobility. The …

Permanent Magnet Synchronous Motors (PMSM) are widely applied in industrial and robotic applications due to their high efficiency, low inertia and high torque – to - volume ratio. So, this paper proposes two simulation dynamic models for ac Interior Permanent Magnet Synchronous Motor (IPMSM), and ac Surface Permanent Magnet

1 Introduction. Permanent magnet synchronous motor (PMSM) drives are used on large scale for industrial applications having the following advantages: high efficiency, high power density and high dynamic response [].Vector control, direct torque and flux control and scalar control are the main control methods applied to PMSMs with and …

The magnitude of the magnetic field (B) is more a function of the shape of the magnet than its size. For example, a 1/4" cube has a Surface Field of 5754 Gauss.So does a bigger cube, such as a 1/2" cube (), 1" cube …

The system comprises a direct-drive PMM that provides the driving force for a PCP; a control system that enables starting, stopping, and full forward and backward management of the motor; a clamp to transmit the power from the motor shaft to the polished rod, sucker rod, and rotor of the PCP; and a braking resistor cabinet that dissipates the ...

Differently from the surface-mounted permanent magnet (PM) synchronous motors, there is an asymmetry of the reluctance between the d-axis and the q-axis, in which saliency can be used to produce reluctance torque in addition to the magnet torque, thus improving the efficiency. In addition, the IPMSMs provide more rotor robustness as …

N2 - The purpose of this work is the development of an estimation method of initial rotor position for surface permanent magnet (PM) synchronous motor without a position sensor. The principle of the estimation is based on the variation of the current response caused by the magnetic saturation of the stator core when the voltage vector is ...