Invention Grant
- Patent Title: Vortex cooling of voice coils
- Patent Title (中): 音圈涡流冷却
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Application No.: US13026374Application Date: 2011-02-14
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Publication No.: US08577074B2Publication Date: 2013-11-05
- Inventor: Alan Babb
- Applicant: Alan Babb
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Taft Stettinius & Hollister LLP
- Agent Keith Swedo, Esq.
- Main IPC: H04R1/00
- IPC: H04R1/00 ; H04R9/06 ; H04R11/02

Abstract:
A low frequency transducer arrangement includes at least one substantially annular magnet. A voice coil is disposed within and concentric with the magnet. A pole is disposed within and concentric with the voice coil. An air gap is defined between the magnet and the pole. The pole includes a bottom half having a downwardly facing axial recess. A plurality of first air passages extend laterally from the axial recess and fluidly interconnect the recess and the air gap. A top half has an upwardly facing axial recess. A plurality of second air passages extend laterally from the upwardly facing axial recess and fluidly interconnect the upwardly facing recess and the air gap. The first air passages and/or the second air passages are non-radially oriented.
Public/Granted literature
- US20120207338A1 VORTEX COOLING OF VOICE COILS Public/Granted day:2012-08-16
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