Thermal Management
Passive Thermal Management Options for EMS Devices
Posted in Electronics, Thermal Management, Power Management, Medical, Features, MDB on Monday, 01 April 2013
High-frequency pulsed electromagnetic stimulation (EMS) devices are more powerful and effective than ever before. These devices are finding applications in many areas, including as treatments for stress and depression, osteoporosis, and soft tissue injuries. Electromagnetic therapies stimulate tissue and cell mass to recuperate faster. The base technology for pulsed electromagnetic field (PEMF) is to input electrical energy into copper windings to create a series of electromagnetic waves. The waves offer a non-invasive anti-inflammatory and accelerated healing treatment option. In many cases, these devices have a large metal content and need to dissipate hundreds of watts of heat to effectively generate and deliver pulsed electromagnetic waves.
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High Power LED Chip Array Packaging
Posted in Manufacturing & Prototyping, Custom & Contract Manufacturing, Electronics, Electronic Components, Power Supplies, Thermal Management, Power Management, Medical, Lighting, LEDs, Features, MDB on Thursday, 01 November 2012
The last few years have seen the development of larger, higher power, higher luminescence light-emitting diode (LED) chips. Prior to this, LEDs were typically 0.020" x 0.020", came in various colors and were used primarily as optical indicators. This new breed of LEDs come in various colors, including white and UV, are typically 0.040" x 0.040" and are designed to provide high intensity light for illumination applications. Individually packaged versions of these LEDs are being used in arrays and clusters to replace standard incandescent and compact fluorescent light bulbs and are much more efficient at converting electrical power into usable optical power.
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New Thermal Management Strategies for Medical Devices
Posted in Bio-Medical, Thermal Management, Manufacturing & Prototyping, Medical, Briefs, MDB on Sunday, 01 April 2012

Heat pipes and vapor chambers are being utilized to address challenging thermal management requirements.

In an increasing number of medical device applications, thermal issues limit the overall performance and reliability of the system. Basic thermal management strategies such as liquid cold plates, air cooled heat sinks, and thermal interface materials are becoming insufficient as stand-alone solutions. In many new medical applications, implementation of advanced thermal technologies such as heat pipes and vapor chambers are becoming an integral part of the thermal management solution. These technologies offer excellent heat transfer and heat spreading performance. Furthermore, they are passive (no energy, no moving parts), quiet, and reliable. Several medical devices, such as powered surgical forceps, skin/tissue contacting devices, and polymerase chain reaction (PCR)/thermocyclers already use these technologies, and more applications are emerging. A discussion of heat pipe and vapor chamber operation and selected medical device applications follows.
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