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Yoke, electromagnetic actuator, and stirling engine

A technology of electromagnetic actuators and yokes, applied in the directions of machines/engines, engine components, electric components, etc., can solve the problems of complex structure, low durability, increased manufacturing cost, etc., and achieve high efficiency.

Inactive Publication Date: 2006-11-08
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Since it is difficult to laminate the sheets radially with respect to the center axis and also needs to be changed after they are manufactured, this results in an increase in manufacturing time and also in an increase in manufacturing cost
Moreover, due to the complicated structure, there arises the problem of low durability and low shock resistance

Method used

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  • Yoke, electromagnetic actuator, and stirling engine
  • Yoke, electromagnetic actuator, and stirling engine
  • Yoke, electromagnetic actuator, and stirling engine

Examples

Experimental program
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Embodiment Construction

[0064] Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1A It is a sectional view of an example of the linear actuator of the present invention. Figure 1B for Figure 1A Plan view of the linear actuator shown in .

[0065] Figure 1A and Figure 1B The linear actuator A shown in has: a cylindrical inner yoke 1, a cylinder 2 inserted into an inner peripheral surface 100 of a cylinder portion 10 of the cylindrical inner yoke 1, provided on the inner yoke 1 The reciprocating motion member 3 outside but not in contact with the reciprocating motion member 3, the outer yoke 4 disposed on the outer side of the reciprocating motion member 3 but not in contact with the inner yoke 1 and the reciprocating motion member 3, and the outer yoke 4 disposed on the outer yoke 4 The coil 5 on the groove portion 41 on the inner peripheral surface. The inner yoke 1 , the cylinder block 2 , the reciprocating motion 3 ...

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PUM

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Abstract

A yoke used for electromagnetic actuators is disclosed which is formed by compacting a soft magnetic iron powder. The yoke is provided with a notch portion for preventing eddy current loss. By having such a notch portion, eddy current loss is prevented in the yoke, thereby enabling to operate an actuator highly efficiently.

Description

technical field [0001] The present invention relates to a magnetic yoke forming a magnetic circuit, an electromagnetic actuator including the foregoing magnetic yoke, and a Stirling engine including the foregoing electromagnetic actuator. Background technique [0002] Conventionally, in order to prevent the generation of eddy currents, a laminated yoke with thin laminated plates is used as a yoke for an electromagnetic (linear) actuator. Such a laminated yoke is formed by laminating a predetermined number of yoke blank plates by means of caulking, gluing, etc., and the yoke blank plates are molded into a predetermined shape by punching technology or the like. The laminated yoke is formed with top and bottom surfaces that are parallel to each other and with sides that are orthogonal to the top and bottom surfaces. [0003] In motors that generate electromagnetic power by wrapping a coil around a laminated yoke, the coil rotates in a cross-section orthogonal to the direction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/12H01F1/22H01F3/08H02K1/02H02K33/16
CPCF02G2280/20H01F1/22H01F3/08H02K33/16H02K1/02H02K1/12H02K1/141H02K1/145H02K1/18
Inventor 田中章三
Owner SHARP KK
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