Title:
MICROCHANNEL-COOLED COILS OF ELECTROMAGNETIC ACTUATORS EXHIBITING REDUCED EDDY-CURRENT DRAG
Document Type and Number:
WIPO Patent Application WO/2012/029998
Kind Code:
A3
Abstract:
Linear and planar motors, as exemplary electromagnetic actuators, are disclosed that have at least one actively cooled coil assembly. An exemplary assembly includes a coil having first and second main surfaces. Also included is a respective thermally conductive cooling plate in thermal contact with at least one main surface of the coil. A coolant passageway is defined in or on each cooling plate, and a liquid coolant passes through the coolant passageway. The coolant passageway has a primary pattern that is coextensive with at least part of the main surface of the coil. The primary pattern can include a secondary pattern producing coolant flow through the coolant passageway in a manner that reduces eddy-current losses in the cooling plate. The coolant passageway desirably includes. An exemplary secondary pattern is serpentine. An exemplary primary pattern is radial or has a radial aspect, such as an X-shaped pattern. The devices provide more effective cooling, with better reliability and ease of maintenance, and reduced eddy-current drag than conventional actuators.
Inventors:
BINNARD MICHAEL B (JP)
COAKLEY SCOTT (JP)
POON ALEX (JP)
TOTSU MASAHIRO (JP)
COON DEREK (JP)
KHO LEONARD (JP)
KESWANI GAURAV (JP)
COOPER ALEXANDER (JP)
PHARAND MICHEL (JP)
BJORK MATT (JP)
COAKLEY SCOTT (JP)
POON ALEX (JP)
TOTSU MASAHIRO (JP)
COON DEREK (JP)
KHO LEONARD (JP)
KESWANI GAURAV (JP)
COOPER ALEXANDER (JP)
PHARAND MICHEL (JP)
BJORK MATT (JP)
Application Number:
PCT/JP2011/070669
Publication Date:
June 28, 2012
Filing Date:
September 05, 2011
Export Citation:
Assignee:
NIPPON KOGAKU KK (JP)
BINNARD MICHAEL B (JP)
COAKLEY SCOTT (JP)
POON ALEX (JP)
TOTSU MASAHIRO (JP)
COON DEREK (JP)
KHO LEONARD (JP)
KESWANI GAURAV (JP)
COOPER ALEXANDER (JP)
PHARAND MICHEL (JP)
BJORK MATT (JP)
BINNARD MICHAEL B (JP)
COAKLEY SCOTT (JP)
POON ALEX (JP)
TOTSU MASAHIRO (JP)
COON DEREK (JP)
KHO LEONARD (JP)
KESWANI GAURAV (JP)
COOPER ALEXANDER (JP)
PHARAND MICHEL (JP)
BJORK MATT (JP)
International Classes:
H02K3/24
Foreign References:
| US20090315414A1 | 2009-12-24 | |||
| US20010013580A1 | 2001-08-16 | |||
| US20020163256A1 | 2002-11-07 | |||
| EP1156579A1 | 2001-11-21 |
Attorney, Agent or Firm:
SHIGA Masatake et al. (Marunouchi Chiyoda-k, Tokyo 20, JP)
Download PDF:
Previous Patent: INFLUENZA VIRUS NEUTRALIZING ANTIBODY AND METHOD FOR SCREENING SAME
Next Patent: AIR PUMP FOR A BEDSORE-PREVENTING MATTRESS
Next Patent: AIR PUMP FOR A BEDSORE-PREVENTING MATTRESS