scholarly journals Design of permanent magnets to chaoize doubly salient permanent magnet motors for electric compaction

2006 ◽  
Vol 99 (8) ◽  
pp. 08R306 ◽  
Author(s):  
K. T. Chau ◽  
Zheng Wang
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
Permanent Magnet Motors ◽  
Doubly Salient

Analysis of a Tubular Linear Permanent Magnet Motor for Reciprocating Compressor Applications

2013 ◽  
Vol 448-453 ◽  
pp. 2114-2119 ◽  
Author(s):  
Izzeldin Idris Abdalla ◽  
Taib Ibrahim ◽  
Nursyarizal Mohd Nor
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
Outer Radius ◽  
Design Parameters ◽  
Reciprocating Compressor ◽  
Permanent Magnet Motors ◽  
Permanent Magnet Motor ◽  
Element Analysis ◽  
Split Ratio ◽  
Single Coil

This paper describes a design optimization to achieve optimal performance of a two novel single-phase short-stroke tubular linear permanent magnet motors (TLPMMs) with rectangular and trapezoidal permanent magnets (PMs) structures. The motors equipped with a quasi-Halbach magnetized moving-magnet armature and slotted stator with a single-slot carrying a single coil. The motors have been developed for reciprocating compressor applications such as household refrigerators. It is observed that the TLPMM efficiency can be optimized with respect to the leading design parameters (dimensional ratios). Furthermore, the influence of mover back iron is investigated and the loss of the motor is computed. Finite element analysis (FEA) is employed for the optimization, and the optimal values of the ratio of the axial length of the radially magnetized magnets to the pole pitch as well as the ratio of the PMs outer radius-to-stator outer radius (split ratio), are identified.

The Origin of Permanent Magnet Induced Vibration in Electric Machines

1991 ◽  
Vol 113 (4) ◽  
pp. 476-481 ◽  
Author(s):  
B. S. Rahman ◽  
D. K. Lieu
Keyword(s):  
Permanent Magnet ◽  
Motor Performance ◽  
Permanent Magnets ◽  
Electric Machines ◽  
Permanent Magnet Motors ◽  
Forcing Function ◽  
Surrounding Structure ◽  
Resonant Modes ◽  
Principal Source ◽  
The Magnetic Field

A principal source of vibration in permanent magnet motors and generators is the induced travelling forces from the rotating permanent magnets acting on the stator. The form of the magnetic field and resulting forcing function in the airgap of such machines is critical. The stator is modelled as a solid ring, with no teeth. Various motor parameters were investigated, including the effects of radial versus parallel magnetization, magnetization tolerances, and radial offset. The results were determined with analytical and FEM models. It was concluded that radial magnetization of the permanent magnets was preferable for both vibration and motor performance. Magnetization tolerances and radial offsets yielded a relatively more populated frequency spectrum for the forcing function and thus could lead to a greater probability of resonant modes being excited in the surrounding structure.

scholarly journals Nonlinear varying-network magnetic circuit analysis for doubly salient permanent-magnet motors

2000 ◽  
Vol 36 (1) ◽  
pp. 339-348 ◽  
Author(s):  
Ming Cheng ◽  
K.T. Chau ◽  
C.C. Chan ◽  
E. Zhou ◽  
X. Huang
Keyword(s):  
Permanent Magnet ◽  
Magnetic Circuit ◽  
Circuit Analysis ◽  
Permanent Magnet Motors ◽  
Doubly Salient

Effect of skewing the rotor teeth on the performance of doubly salient permanent magnet motors

2006 ◽  
Vol 99 (8) ◽  
pp. 08R320 ◽  
Author(s):  
N. K. Sheth ◽  
A. R. C. Sekharbabu ◽  
K. R. Rajagopal
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Motors ◽  
Doubly Salient
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