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Electrical linear machine

A linear motor and armature technology, applied in electrical components, electromechanical devices, electric components, etc., can solve problems such as decline and lasting damage to efficiency, and achieve the effects of low cost, guaranteed oscillating operation, and simple structure

Active Publication Date: 2017-08-29
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the disadvantage to be overcome is that the efficiency of linear motors excited by permanent magnets drops rapidly at high operating temperatures due to reversible demagnetization, or the efficiency can be permanently impaired in the case of irreversible demagnetization

Method used

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  • Electrical linear machine
  • Electrical linear machine
  • Electrical linear machine

Examples

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Embodiment Construction

[0023] figure 1 A linear motor 1 is shown schematically with a stator 2 fastened to a housing and an armature 3 that is linearly, precisely axially displaceable. For this purpose, the stator 2 is arranged fixedly in a housing which is not shown in detail here. The armature 3 has an armature shaft 4 which is held in the housing of the linear motor 1 via two linear bearings 5 ​​(shown only schematically here).

[0024] Furthermore, a permanent magnet 6 is arranged on the armature shaft 4 in a fixed connection to the armature shaft 4 . A permanent magnet has a magnetic north pole N and a magnetic south pole S. In this case, the magnetic axis passing through the north and south poles is oriented perpendicular to the movement axis or armature axis 7 of the armature 3 . Also arranged between the permanent magnet 6 and one of the linear bearings 5 ​​is a spring element 8 , here in the form of a helical spring, which is charged with a spring pretension, in particular in opposition ...

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Abstract

The invention relates to an electrical linear machine (1) having a stator (2) which is fixed to the housing and having an armature (3) which can be axially displaced and supports a permanent magnet (6), wherein the stator (2) has a first and a second stator yoke (9, 10), which stator yolks each form a stator pole (11-14), wherein the stator poles (11-14) are arranged in a manner distributed radially and uniformly around the armature (3), and wherein at least one coil (17), to which current can be applied, is associated with the first stator yoke (9) for the purpose of generating a first magnetic flux through the first stator yoke (9) and the permanent magnet (6), and wherein a magnetic north pole (N) of the permanent magnet (6) is associated with a stator pole (13) of the second stator yoke (10) and a magnetic south pole (S) of the permanent magnet (6) is associated with the other stator pole (14) of the second stator yoke (10) in order to generate a second magnetic flux through the second stator yoke (10).

Description

technical field [0001] The invention relates to a linear motor with a stator fastened to a housing and an axially displaceable armature carrying permanent magnets. Background technique [0002] Linear motors are known per se. Laid-open document DE 100 55 078 C1 discloses, for example, a linear motor which operates as a reluctance motor according to the transverse flux principle, ie in which the magnetic flux runs transversely to the direction of motion of the oscillating armature (oscillator). The disadvantages of linear motors, which generate a magnetic flux by the provision of permanent magnets, are to be overcome by means of the electrical excitation of the linear motor. In particular, the disadvantage should therefore be overcome that the efficiency of linear motors excited by permanent magnets drops rapidly at high operating temperatures due to reversible demagnetization, or that the efficiency can be permanently impaired in the case of irreversible demagnetization. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K33/02H02K33/16
CPCH02K33/02H02K33/16H02K11/20H02K11/33H02K41/03
Inventor A·帕维勒茨李响
Owner ROBERT BOSCH GMBH