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Title: Single coil bistable, bidirectional micromechanical actuator

Abstract

Micromechanical actuators capable of bidirectional and bistable operation can be formed on substrates using lithographic processing techniques. Bistable operation of the microactuator is obtained using a single coil and a magnetic core with a gap. A plunger having two magnetic heads is supported for back and forth linear movement with respect to the gap in the magnetic core, and is spring biased to a neutral position in which the two heads are on each side of the gap in the core. The single electrical coil is coupled to the core and is provided with electrical current to attract one of the heads toward the core by reluctance action to drive the plunger to a limit of travel in one direction. The current is then cut off and the plunger returns by spring action toward the gap, whereafter the current is reapplied to the coil to attract the other head of the plunger by reluctance action to drive the plunger to its other limit of travel. This process can be repeated at a time when switching of the actuator is required.

Inventors:
 [1];  [1]
  1. Madison, WI
Publication Date:
OSTI Identifier:
871846
Patent Number(s):
US 5808384
Application Number:
08/869,789
Assignee:
Wisconsin Alumni Research Foundation (Madison, WI)
DOE Contract Number:  
AL5799
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
single; coil; bistable; bidirectional; micromechanical; actuator; actuators; capable; operation; formed; substrates; lithographic; processing; techniques; microactuator; obtained; magnetic; core; gap; plunger; heads; supported; forth; linear; movement; respect; spring; biased; neutral; position; electrical; coupled; provided; current; attract; reluctance; action; drive; limit; travel; direction; cut; returns; whereafter; reapplied; head; process; repeated; time; switching; required; electrical current; magnetic core; processing techniques; single electrical; micromechanical actuators; bistable operation; spring biased; stable operation; micromechanical actuator; processing technique; electrical coil; linear movement; lithographic processing; /310/

Citation Formats

Tabat, Ned, and Guckel, Henry. Single coil bistable, bidirectional micromechanical actuator. United States: N. p., 1998. Web.
Tabat, Ned, & Guckel, Henry. Single coil bistable, bidirectional micromechanical actuator. United States.
Tabat, Ned, and Guckel, Henry. Tue . "Single coil bistable, bidirectional micromechanical actuator". United States. https://www.osti.gov/servlets/purl/871846.
@article{osti_871846,
title = {Single coil bistable, bidirectional micromechanical actuator},
author = {Tabat, Ned and Guckel, Henry},
abstractNote = {Micromechanical actuators capable of bidirectional and bistable operation can be formed on substrates using lithographic processing techniques. Bistable operation of the microactuator is obtained using a single coil and a magnetic core with a gap. A plunger having two magnetic heads is supported for back and forth linear movement with respect to the gap in the magnetic core, and is spring biased to a neutral position in which the two heads are on each side of the gap in the core. The single electrical coil is coupled to the core and is provided with electrical current to attract one of the heads toward the core by reluctance action to drive the plunger to a limit of travel in one direction. The current is then cut off and the plunger returns by spring action toward the gap, whereafter the current is reapplied to the coil to attract the other head of the plunger by reluctance action to drive the plunger to its other limit of travel. This process can be repeated at a time when switching of the actuator is required.},
doi = {},
url = {https://www.osti.gov/biblio/871846}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {9}
}

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