permanent magnet synchronous machine drives

... of Interior Permanent Magnet Synchronous Machine 118 4.3 The Phasor Diagram of a Permanent Magnet Synchronous Machine 122 4.4 Cross Section of Line-Start Permanent Magnet Synchronous Machine 124 ... Permanent Magnet Machines 1.2 Permanent Magnet Materials 1.3 Line-Start Permanent Magnet Synchronous Machines 1.4 Computational Analysis of Permanent ... excitation and permanent magnet excitation The former method is used in conventional DC and synchronous machines, and the latter one is used in permanent magnet( PM) machines Permanent magnet machines...

Ngày tải lên: 15/09/2015, 22:17

... magnitude and/or frequency The operation is then similar to operating the motor as a permanent magnet synchronous machine At low frequencies, the rotor field interacts with the stator field to provide ... several unique features The rotor has got surface-mounted permanent magnet constructing a smooth and big air-gap machine Therefore, electromagnetic (EM) torque contributed by reluctance torque can ... Figure 5.1 Motor positional inductance profile without saturation 88 Figure 5.2 Magnetic field produced by permanent magnet on rotor 89 Figure 5.3 Influence of armature winding current to stator...

Ngày tải lên: 11/09/2015, 09:07

... 0): 13.14O) le = p.Wrq(0) iq DYNAMIC BEHAVIOUR OF NON-SINUSOIDAL PERMANENT- MAGNETSYNCHRONOUS DRIVES I * A four poles pmanent -magnet synchronous motor has been modelled through a finite element code ... written under the form: We can also write the dynamic model of a star connected nonsinusoidal permanent magnet synchronous motor with constant air gap (figure 1) 34 The Variations of these fluxes give ... of the Park's transfonnation permits us to have a best knowledge of the non sinusoidal permanent magnet synchronous motor We are so able as well to analyse the classical control laws such as...

Ngày tải lên: 03/01/2014, 19:50

... excited permanent- magnet motor - design and performance Third International Conference on Electrical Machines and Drives, IEE, London, UK, Nov 16th-18th 1987, pp 246249 LOW, T.S Permanent- magnet ... motor drives IEEE, 1987, PE-2, (l), pp 55-6‘1 11 CHAMPENOIS, G., MOLLARD, PH., and ROGNON, J.P ’ ‘ T w o digital torque control structures for permanent magnets converter fed sinusoidal synchronous ... summarised in a motor dynamic equation: T, = Ja + Dw + 7; (1) The electromagnetic behaviour of a three-phase synchronous machine is modelled as consisting of a field winding f and three stator...

Ngày tải lên: 03/01/2014, 19:52

... 542 PERMANENT- MAGNET AC MOTOR DRIVES Electrical System Power Converter PM AM Command Signal Control Sensors Mechanical System Figure 14.1-1 Permanent- magnet ac motor drive The ... the type of permanent- magnet ac motor drive, of which there are two main classes, voltage-source-based drives and current-regulated drives Both voltage-source and current-regulated drives may ... space-vector-modulated inverter to an idealized source is established 544 PERMANENT- MAGNET AC MOTOR DRIVES The six-stepped inverter-based permanent- magnet ac motor drive is the simplest of all the strategies...

Ngày tải lên: 16/02/2014, 18:54

... Method GA Genetic Algorithms MMF Magneto-motive Force xvii xviii MTPA Maximum Torque Per Ampere PI Proportional Integral PM Permanent Magnet PMSM Permanent Magnet Synchronous Motor PWM Pulse Width ... 1.2 Characteristics of Permanent Magnet Materials 1.3 Structures for exterior permanent magnet motors 1.4 Structures for interior permanent magnet motors 1.5 ... and Interior Permanent Magnet (IPM) motors in which the permanent magnets are hidden inside the rotor, Fig 1.4 The surface-mounted PMSM (Fig 1.3 a) in EPM motors can have magnets magnetized radially...

Ngày tải lên: 15/09/2015, 22:06

... materials, power electronics and electrical machine design, the permanent magnet synchronous motor (PMSM) has been used widely in different areas e.g hard disk drives (HDDs) As its high efficiency and ... 4.2 Unbalanced Magnetic Pulls 41 2.1 Static Unbalanced Magnetic Pull 41 2.2 Dynamical Unbalanced Magnetic Pull 46 2.3 Incline Unbalanced Magnetic Pull 49 2.4 54 4.3 Axial Unbalanced Magnetic Pull ... FAULT DIAGNOSIS OF PERMANENT MAGNET SYNCHRONOUS MOTOR BASED ON MECHANICAL AND MAGNETIC CHARACTERISTIC ANALYSES YU YINQUAN A THESIS SUBMITTED FOR...

Ngày tải lên: 16/09/2015, 12:06

... use of permanent magnet machines Figure 1.2: Evolution of the magnetic material during the 20th century [2] 1.1.2 Features of permanent magnet motors The use of permanent magnet material in machine ... 1.1.1 The development of Permanent Magnet Machines 1.1.2 Features of permanent magnet motors Permanent magnet synchronous motors iii 1.2.1 ... Figures 1.1 Magnetic characteristics of the main class of permanent magnets [2] 1.2 Evolution of the magnetic material during the 20th century [2] 1.3 Partial demagnetization of a permanent magnet...

Ngày tải lên: 04/10/2015, 15:45

... line-starting permanentmagnet synchronous motor,” in Proc Int Conf Electrical Machines, Portugal, Sept 2008, pp 1–6 [30] C Lee and B Know, “Design of post-assembly magnetization system of line start permanent ... Electrical Machines (ICEM’08), Algarve, Portugal, Sept 2009, pp 259–264 [12] Siemens, “SD100 TEFC NEMA motors,” Product Tech Catalogue, 2009 [13] Leroy-Somer, Synchronous permanent magnet motor,” ... in Proc Int Conf Electrical Machines and Systems, Korea, Oct 2007, pp 1629–1634 [25] J Soulard and H Nee, “Study of the synchronization of line-start permanent magnet synchronous motors,” in Proc...

Ngày tải lên: 26/11/2015, 09:42

... CAUTION: During field weakening of a Surface Permanent Magnet (SPM) type of PMSM, mechanical damage of the rotor and the demagnetization of the permanent magnets is possible if careful measures are ... Graph ΨPM d Intrinsic characteristic of permanent magnet Normal characteristic of permanent magnet Where: H = Field intensity B = Field induction BR = Permanent induction value HC = Coercivity ... interior permanent magnet Each type has its own advantages and disadvantages with respect to the application needs The proposed control scheme has been developed around a surface-mounted permanent magnet...

Ngày tải lên: 11/01/2016, 17:05

... can be kept at an extremely low level Permanent magnet (PM) brushless dc motors are adopted in hard disk drives Modern permanent magnets possess high residual magnetization and high coercivity Thus, ... of the magnet, Rr the inner radius of the rotor yoke, Mn and Nn are the Fourier coefficients of the magnetization of the permanent magnets, r is the relative permeability of the permanent magnet, ... working region of the magnet It can be observed that such type of magnet shows very good linearity in the working region Figure 1.4 A typical demagnetization curve of NdFeB permanent magnet There are...

Ngày tải lên: 15/09/2015, 22:03

... of another up coming magnet placed right next to #1 magnet 4th Stage Resistance of the attraction #2 #3 #1 Place the third magnet as so and that 3rd magnet will pull the #2 magnet out of the resistance ... source for larger ceramic permanent magnets Note: you will not need to stack the angled carriage magnets they will work just fine just using one N S magnet stack Permenant magnet motors are very ... motor to run the car a to hp motor can run your home Page Permanent Magnet Motor Files #376 When building your magnet array if you use magnets as seen on page you will get a dead spot on #7 and...

Ngày tải lên: 19/01/2014, 20:20

... Chapter 14 4.2 VOLTAGE AND TORQUE EQUATIONS IN MACHINE VARIABLES A two-pole, permanent- magnet ac machine, which is also called a permanent- magnet synchronous machine, is depicted in Figure 4.2-1 It ... Conditioner— Machine Interaction for Electronically Commutated DC Permanent Magnet Machines,” IEEE Trans Magn., Vol 17, November 1981, pp 3284–3286 [3] T.M Jahns, “Torque Production in Permanent- Magnet Synchronous ... is noted that Ea for the permanent- magnet ac machine, (4.4-9), is along the reference (real) axis 129 BRUSHLESS DC MOTOR 4.5 BRUSHLESS DC MOTOR The permanent- magnet ac machine is often referred...

Ngày tải lên: 16/02/2014, 18:46

... to the permanent magnet flux linkage [6]; If E is large and the coercivity of the magnet is not enough, then the permanent magnet demagnetization may create a serious problem and the magnet torque ... values of the demagnetizing coefficient are about 0.8 In some cases, the permanent magnet is demagnetized irreversibly by the flux-weakening control VI DEMAGNETIZATION OF PERMANENT MAGNET If the ... FOR PERMANENT MA(;NET MOTORS 4) The control method considering the demagnetizationlimit is analyzed If the permanent magnet has a straight demagnetization curve, as does a rare-earth permanent magnet, ...

Ngày tải lên: 08/03/2014, 22:01

... 15 SYNCHRONOUS MACHINES Rotor Details 06/29/14 360 Topic Synchr • 16 SYNCHRONOUS MACHINES Round rotor Steel ring Shaft Wedges DC current terminals 06/29/14 360 Topic Synchr • 17 SYNCHRONOUS MACHINES ... leakage is called synchronous reactance X syn • The value of the synchronous reactance is more than 100% 06/29/14 360 Topic Synchr • 29 SYNCHRONOUS MACHINES Operation concept • The synchronous reactance ... Topic Synchr • 35 SYNCHRONOUS MACHINES Rotor generated Flux and Induced Voltage, Round rotor machine • Θm= 00 For the calculation of the induced voltage, the machine is simplified • Magnetic axis...

Ngày tải lên: 29/06/2014, 01:20

... Concepts Basic relationships Magnetic field sources Air gap modeling Slot modeling Example Magnetic Materials Permeability Ferromagnetic materials Core loss Permanent magnets PM magnetic circuit model ... increasing use of brushless permanent- magnet motors in applications ranging from hard disk drives to a variety of x Preface industrial and military uses Brushless permanent- magnet motors have become ... analysis and design of rotational brushless permanent- magnet (PM) motors Brushless dc, PM synchronous, and PM step motors are all brushless permanent- magnet motors These specific motor types evolved...

Ngày tải lên: 02/07/2014, 08:20

... of magnetic material, air gaps, and slotted magnetic structures were developed The properties of ferromagnetic and permanent- magnet materials were discussed A magnetic circuit model of a permanent ... Chapter T sumes that the physical magnet is uniformly magnetized over its cross section and is magnetized in its preferred direction of magnetization When the magnet shape differs from the rectangular ... of a permanent magnet Because of its importance in brushless PM motors, it is important to consider the coenergy stored in the magnetic field of magnetic circuit containing a PM For the magnetic...

Ngày tải lên: 02/07/2014, 08:20

... force component adds a small thrust load to the rotor bearings Magnet shaping Though not apparent from (5.12), magnet shape and magnet- to -magnet leakage flux has a significant effect on cogging torque ... the magnets narrower in width, i.e., decreasing r m , or by decreasing the magnet length l m as one approaches the magnet edges In either case, the desired mutual torque decreases because less magnet ... magnetic circuit shown in Fig 6.5 This magnetic circuit is similar to that shown in Fig 4.2, except for the additional air gap, magnet leakage, and stator Steps in the simplification of the magnetic...

Ngày tải lên: 02/07/2014, 08:20

... a,< = Wtbi + wsb RÎ) Distribution factor Pitch factor Skew factor Magnet fraction Flux concentration factor Permeance coefficient Magnet leakage factor Effective air gap for Carter coefficient Air ... called a synchronous motor Operation of this motor follows (7.2) also However, in this case it is easier to illustrate torque production analytically The key to understanding the two-phase synchronous ... three-phase motor 172 Chapter Seven not difficult Simply making the magnet arc narrower works, which results in the use of less magnet material To ease the explanation of the A connection, the rising...

Ngày tải lên: 02/07/2014, 08:20

... on Magnetics, vol 26, no 5, pp 1653-1655 Slemon, G R (1991), "Chapter 3: Design of Permanent Magnet AC Motors for Variable Speed Drives, " Performance and Design of Permanent Magnet AC Motor Drives, ... magnet) Magnet aspect ratio, 67, 68 Magnetic circuit concepts, 14 Magnet fraction, 66, 141 Magnet leakage factor, 67, 142 Magnet leakage flux, 66 Magnet shaping, 120 Magnetomotive force (mmf), definition ... electric and magnetic, 99 Lorentz force equation, 56, 63 Loss: core, 28-30, 96 eddy current, 28, 29 hysteresis, 28, 29 ohmic, resistive, or I2R, 76 Magnet (See Permanent magnet) Magnet aspect...

Ngày tải lên: 02/07/2014, 08:20