Title:
SENSORLESS CONTROL OF A HARMONICALLY DRIVEN ELECTRODYNAMIC MACHINE FOR A THERMOACOUSTIC DEVICE OR VARIABLE LOAD
Document Type and Number:
WIPO Patent Application WO2004045060
Kind Code:
A3
Abstract:
The present invention provides a method of sensorless control of a linear reciprocating electrodynamic machine used for driving a thermoacoustic device, and/or a similar frequency dependent load. Sensorless control is accomplished by estimating the state of predetermined performance parameters at the linear machine through the use of a system model. Thereafter, the method comprises providing a control means operative to obtain the estimated performance parameters and cause manipulation of at least one input parameter to the linear machine such that desired performance parameters are obtained in view of the estimated performance parameters.
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Inventors:
SHEARER TONY L (US)
SMITH ROBERT W M (US)
HOFMANN HEATH F (US)
SMITH ROBERT W M (US)
HOFMANN HEATH F (US)
Application Number:
PCT/US2003/035802
Publication Date:
April 28, 2005
Filing Date:
November 12, 2003
Export Citation:
Assignee:
PENN STATE RES FOUND (US)
SHEARER TONY L (US)
SMITH ROBERT W M (US)
HOFMANN HEATH F (US)
SHEARER TONY L (US)
SMITH ROBERT W M (US)
HOFMANN HEATH F (US)
International Classes:
F25B1/00; F25B9/00; H02P25/02; F25B9/14; H02K33/00; H02P; (IPC1-7): F25B9/00; F25B1/00
Foreign References:
| US5342176A | 1994-08-30 | |||
| US5857340A | 1999-01-12 | |||
| US6289680B1 | 2001-09-18 | |||
| US6307287B1 | 2001-10-23 | |||
| US6351089B1 | 2002-02-26 |
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