Development of High-Force-Density Iron-Core Linear Synchronous Motor

The ropeless elevator driven by linear motor is expected to be a new solution to vertical transportation of skyscrapers and the deep underground mines. Due to high thrust force density, low force ripple and low cost etc., a double-sided permanent magnet linear synchronous motor (DPMLSM) with slotted iron core and multi-segment primary is proposed and designed. Based on the erected 2D finite element model, the structure is optimized in order to reduce the detent force. Moreover, the influence of manufacture error on force performance is also investigated. It is shown the proposed DPMLSM is suitable for the ropeless elevator.

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Detent Force Modeling and Analysis for Vertical Permanent-Magnet Linear Synchronous Motor Using Equivalent Magnetic Network Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.143-144.148 ◽

2011 ◽

Vol 143-144 ◽

pp. 148-153 ◽

Cited By ~ 1

Author(s):

Xiao Zhuo Xu ◽

Xu Dong Wang ◽

Hai Chao Feng ◽

Ji Kai Si

Keyword(s):

Permanent Magnet ◽

Equivalent Circuit Model ◽

Synchronous Motor ◽

Iron Core ◽

Modeling And Analysis ◽

Force Modeling ◽

Detent Force ◽

Linear Synchronous Motor ◽

Calculation Results ◽

Magnetic Network

This paper investigates the detent force modeling of a slotted iron core type vertical permanent magnet linear synchronous motor (PMLSM) for ropeless elevator applications. Variable network non-linear magnetic equivalent circuit model is established to predict the detent force of PMLSM. The topology structure of equivalent magnetic circuit is developed and the permeances are derived and calculated. The end effect of two end teeth is essential for analysis of detent force and it is focused in the modeling. Magnetic saturation of primary iron-core also be taken into account. In final some 3-D finite-element numerical calculation results are used to validate the feasibility of the proposed method.

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Design and Electromagnetic Analysis of a Double-Sided Permanent Magnet Linear Synchronous Motor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.416-417.270 ◽

2013 ◽

Vol 416-417 ◽

pp. 270-275

Author(s):

Xin Min Zhang ◽

Chuan Ying Cheng ◽

Qin Fen Lu ◽

Yun Yue Ye ◽

Xiao Sheng Tao

Keyword(s):

Permanent Magnet ◽

High Speed ◽

Normal Force ◽

Thrust Force ◽

Cooling System ◽

Element Model ◽

Basic Structure ◽

Synchronous Motor ◽

Force Density ◽

Linear Synchronous Motor

The permanent magnet linear synchronous motor (PMLSM) has a good application prospect due to many significant advantages such as high speed, high precision, high thrust force density, simple structure, energy saving and reliable operation etc., so the research and development are of great importance. This paper mainly focuses on the key design points of a double-sided water-cooled PMLSM. According to the required thrust force, the design is given out including the basic structure parameters, winding connection methods and water cooling system. Based on the erected finite-element model, the performances such as back-EMF, thrust force, normal force, power factor and efficiency are predicted. By comparing with a single-sided PMLSM with the same specifications, it is proved that this double-sided PMLSM has lower thrust force ripple and higher thrust force density. Moreover, the net normal force of its mover is almost zero. Finally, the predicted back-EMF is verified by measurement.

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