Invention Grant
- Patent Title: Self-cooling electromagnetic transducer
- Patent Title (中): 自冷电磁换能器
-
Application No.: US11392984Application Date: 2006-03-28
-
Publication No.: US08014555B2Publication Date: 2011-09-06
- Inventor: Ralph E. Hyde , Douglas J. Button
- Applicant: Ralph E. Hyde , Douglas J. Button
- Applicant Address: US CA Northridge
- Assignee: Harman International Industries, Incorporated
- Current Assignee: Harman International Industries, Incorporated
- Current Assignee Address: US CA Northridge
- Agency: The Eclipse Group LLP
- Main IPC: H04R1/02
- IPC: H04R1/02

Abstract:
An electromagnetic transducer includes a housing, a diaphragm, a conductive coil, and a magnetic assembly having a plurality of air passages. The coil communicates with the diaphragm such that a flexible portion of the diaphragm is movable in response to movement of the coil. The coil includes axially spaced first and second coil portions. The magnetic assembly is disposed in the housing and is axially spaced from the diaphragm by an interior region. The coil portions are at least partially disposed in an annular gap formed in the magnetic assembly. Each air passage communicates with the interior region and with a respective aperture of the housing. The air passages provide respective air flow paths between the diaphragm and the ambient environment. Air flow through the passages is affected by movement of the flexible diaphragm portion for transferring heat from the transducer to the ambient environment.
Public/Granted literature
- US20070237351A1 Self-cooling electromagnetic transducer Public/Granted day:2007-10-11
Information query