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Production method for producing an electromechanical actuator, and an electromechanical actuator

A manufacturing method and actuator technology, applied to piezoelectric devices/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc., can solve problems such as insufficient edge coverage and undesirable atmospheric sealing

Active Publication Date: 2018-03-27
CONTINENTAL AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, it has been found that a complete coating of the stack with an insulating layer is not optimal since, for example, the end faces of the stack should remain bare due to the desired force transmission, and an atmospheric sealing of the stack is also undesirable.
In addition, it has been found that the edge coverage is often not sufficient when the stack is fully coated

Method used

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  • Production method for producing an electromechanical actuator, and an electromechanical actuator
  • Production method for producing an electromechanical actuator, and an electromechanical actuator
  • Production method for producing an electromechanical actuator, and an electromechanical actuator

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Embodiment Construction

[0054] figure 1 An electromechanical actuator 10 is shown, which has an electric device 12 configured as a stack 14 in which a plurality of piezoelectric ceramic layers 16 and a plurality of electrode layers 18 that respond to the application of an electric field are alternately along The longitudinal axis 20 is stacked overlappingly so that each electrode layer 18 is arranged between two piezoelectric ceramic layers 16. At least one external contact in the form of an external electrode 24 is applied to the side 22 of the stack 14, said external contact being electrically connected to the contact pin 26. Through the contact pins 26, the potential can be forwarded to the corresponding contacted electrode layer 18. The electrode layers 18 adjacent to each other can be loaded with different potentials in order to generate an electric field in the stack 14 in this way. In order that the piezoelectric ceramic layer 16 can be changed in its length along the longitudinal axis 20, the...

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Abstract

The invention relates to a production method for producing an electromechanical actuator (10) and to an electromechanical actuator (10), an insulation material (30) being applied to an electrical component (12) designed as a stack (14), to predefined subsections (32) of the surface (28), and the layer thickness (D) of said insulation material continuously tapering to edges (38) of the subsection (32) in question.

Description

Technical field [0001] The present invention relates to a manufacturing method for manufacturing an electromechanical actuator and an electromechanical actuator, the electromechanical actuator being manufactured especially by such a manufacturing method. Background technique [0002] Electromechanical actuators are often used as operating elements, for example in the form of piezoelectric stacks, for example in fuel injection valves of very different engine types in motor vehicles. [0003] Such electromechanical actuators usually have a plurality of piezoelectric ceramic layers that respond to the application of an electric field and a plurality of electrode layers, and the piezoelectric ceramic layers and the electrode layers are alternately stacked and arranged along the longitudinal axis. Such stacks are mostly electrically contacted on two opposite sides so that the electrode layers in the stack can be manipulated so that an electric field is generated within the stack, and t...

Claims

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Application Information

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IPC IPC(8): H01L41/047H01L41/293
CPCH10N30/872H10N30/063H10N30/50H10N30/20
Inventor U.克赖西希A.伦克C.弗兰茨-英霍夫
Owner CONTINENTAL AUTOMOTIVE GMBH