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Circular-shaped linear synchronous motor, electromagnetic suspension and motor-driven steering device using the same

A linear motor, cylinder-type technology, applied in the direction of power steering mechanism, electric steering mechanism, device for lateral relative movement between the chassis and the bogie, etc., can solve problems such as thrust and damping reduction

Inactive Publication Date: 2010-01-27
HITACHI AUTOMOTIVE SYST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the structure described in Patent Document 2, the U-phase, V-phase, and W-phase each independently constitute a magnetic circuit, therefore, spacers are inserted between the phases, and a space irrelevant to performance is provided. Thrust, damping reduction problem

Method used

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  • Circular-shaped linear synchronous motor, electromagnetic suspension and motor-driven steering device using the same
  • Circular-shaped linear synchronous motor, electromagnetic suspension and motor-driven steering device using the same
  • Circular-shaped linear synchronous motor, electromagnetic suspension and motor-driven steering device using the same

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Embodiment Construction

[0040] Below, use Figure 1 to Figure 13 The configuration of the cylindrical linear motor according to the first embodiment of the present invention will be described.

[0041] First, use figure 1 and figure 2 The overall structure of the cylindrical linear motor of this embodiment will be described.

[0042] figure 1 It is a cross-sectional view showing the overall structure of the cylindrical linear motor according to the first embodiment of the present invention. figure 2 yes figure 1 a-a sectional view. in addition, figure 1 yes figure 2 The b-b sectional view of .

[0043] Such as figure 1 As shown, the permanent magnet type three-phase cylindrical linear motor 1 of this embodiment includes: a cylindrical stator 2;

[0044] The stator 2 includes: a stator box 4 ; a stator core 5 ; a stator winding 7 ; and a stator inner box 14 . In addition, a concavo-convex portion (not shown) for heat dissipation is formed on the outer periphery of the stator case 4 . A ...

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Abstract

The invention provides a high-damping and high-thrust cylindrical linear motor and an electromagnetic suspension and a metor-driven steering device using the same. A stator includes a stator winding and a stator core. A slider includes a slider core and a plurality of permanent magnets. The stator core includes a plurality of stator core magnets comprising a plurality of small magnets on surface of the slider side; two auxiliary poles deployed at both ends of the stator-core salient poles; a yoke units configured to compose a magnetic circuit with the auxiliary pole. The magnetic circuit composed by using the stator core is shared among the three phases. Polarities of magnets of the slider become an identical polarity, each of the plurality of permanent magnets being positioned at a position which is opposed to each of the plurality of small poles included in one stator-core salient pole out of the plurality of stator-core salient poles.

Description

technical field [0001] The present invention relates to a cylindrical linear motor, an electromagnetic suspension (Electromagnetics suspension) and an electric power steering device using the same. Background technique [0002] For the permanent magnet type cylindrical linear motor, try to use an inverter to limit the vibration of Shinkansen vehicles and automobiles. In this case, even if the inverter fails, it is only necessary to short-circuit the terminals between the three phases of the cylindrical linear motor to ensure a large attenuation (damping) force, and the problem with the inverter can be eliminated. The hydraulic damper installed in parallel with the linear motor or reduced in size makes it possible to form the entire suspension system in a compact and low-cost manner. [0003] Conventionally, among these, a three-phase synchronous cylindrical linear motor using a permanent magnet is known as a linear motor used as a motor of an electromagnetic suspension (for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K41/03H02K11/00B60G17/015B62D5/04B60G17/00B61F5/12
CPCB60G17/0157B61F5/245B62D5/04B60G2202/422B62D5/0427H02K41/03
Inventor 田岛文男北村正司赤见裕介内海典之李友行
Owner HITACHI AUTOMOTIVE SYST LTD
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