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Low power valve actuation using tran...

Duval, Luis Denit.

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Low power valve actuation using trans-permanent magnetics.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Low power valve actuation using trans-permanent magnetics./
作者:	Duval, Luis Denit.
面頁冊數:	100 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 5171.
Contained By:	Dissertation Abstracts International64-10B.
標題:	Engineering, Mechanical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3107758
ISBN:	0496553062

Low power valve actuation using trans-permanent magnetics.
Duval, Luis Denit.

Low power valve actuation using trans-permanent magnetics. - 100 p.

Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 5171.

Thesis (Ph.D.)--North Carolina State University, 2003.

The subject of magnetic actuators is very broad, and encompasses a wide range of technologies, magnetic circuit topologies, and performance characteristics for an ever-increasing spectrum of applications. As a consequence of recent advances in soft and hard magnetic materials and developments in power electronics, microprocessors and digital control strategies, and the continuing demand for higher performance motion control systems, there appears to be more research and development activity in magnetic actuators for applications spanning all market sectors than at any time.

ISBN: 0496553062Subjects--Topical Terms:

783786
Engineering, Mechanical.

Low power valve actuation using trans-permanent magnetics.
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245 1 0 $a Low power valve actuation using trans-permanent magnetics.
300 $a 100 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 5171.
500 $a Chair: Lawrence M. Silverberg.
502 $a Thesis (Ph.D.)--North Carolina State University, 2003.
520 $a The subject of magnetic actuators is very broad, and encompasses a wide range of technologies, magnetic circuit topologies, and performance characteristics for an ever-increasing spectrum of applications. As a consequence of recent advances in soft and hard magnetic materials and developments in power electronics, microprocessors and digital control strategies, and the continuing demand for higher performance motion control systems, there appears to be more research and development activity in magnetic actuators for applications spanning all market sectors than at any time.
520 $a In this dissertation, a rational approach for switching the states of permanent magnets through an on-board magnetization process is presented. The resulting dynamic systems are referred to as trans-permanent magnetic systems (T-PM). The first part of this research focuses on the governing equations needed for the analysis of T-PM systems. Their feasibility is demonstrated experimentally. In doing so, a method that has the potential of leading to new ultra-low power designs for electromechanical devices is introduced.
520 $a In the second part of this research, the aforementioned developments in T-PM are applied to the problem of low power valves. Whereas alternate approaches to low power valve control may utilize latching mechanisms to maintain valve position during inactive periods, an approach that eliminates latching mechanisms is presented. Instead, the principles of T-PM are employed to switch the states of permanent magnets; the used of permanent magnets instead of electromagnets eliminates power consumption during inactive periods, thereby reducing power consumption to ultra-low levels.
520 $a The magnets in a T-PM actuator are configured in a stack. The relationships between the strength and number of magnets in the stack and the stroke and resolution of the actuator are developed. This dissertation reports on the design and testing of a prototype valve actuator that uses a stack pf T-PM with alternating polarity. It is shown that this stack is well suited for discrete state process valves having a small number of states. It is concluded that the trans-permanent valve represents a promising valve actuation technology.
590 $a School code: 0155.
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Physics, Electricity and Magnetism. $3 1019535
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790 1 0 $a Silverberg, Lawrence M., $e advisor
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791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3107758