Design Article
Tell us What You Think
We want to know what you thought about this Design. Let us know by adding a comment.
Wirelessly charging your medical devices
Nick Schade, Vishay Intertechnology, Inc.
8/29/2012 5:32 PM EDT
IWAS
Advantages of the IWAS coil
The IWAS receiver coil is constructed based on the patented IHLP technology. It utilizes a magnetic wire coil placed on top of a composite material core/shield. This provides the IWAS receiver coil with certain advantages over competing technologies:
1. Permeability: to 24
2. Resistivity: > 10 MΩ at 100 V
3. Core loss: 4000 mW/cc at 500 gauss, 250 kHz
4. Magnetic saturation: 50 % at 4000 gauss (to 350 Oe)
The IWAS style receiver coil is manufactured starting with a very thin, pressed powdered iron wafer. A special, flat, magnet wire coil designed to minimize copper losses and maximize flux transfer is assembled onto the wafer. Leads from the coil are stripped and tinned for easy connection into the customer’s circuit. The completed IWAS receiver coil is then integrated into the back cover of a portable medical electronic device and connected to the communication/charging circuitry. The device is now ready to be placed on any Qi compliant charging station.
Testing
Wirelessly charged medical devices will require independent laboratory verification for electromagnetic compatibility. Some of the standards that are applicable are:
Conclusion
Wireless charging is no longer at our doorstep, it has a foot in the door. It started with smaller devices, like cell phones, and is now expanding to medical and other portable devices – even electric vehicles. The IWAS receiver coil will open the door to efficient and reliable charging of your mobile medical devices.
About the author
Nick Schade is Senior Product/Process Engineer at Vishay Intertechnology, Inc., Inductors Division. He can be reached at Nick.Schade@Vishay.com.
Advantages of the IWAS coil
The IWAS receiver coil is constructed based on the patented IHLP technology. It utilizes a magnetic wire coil placed on top of a composite material core/shield. This provides the IWAS receiver coil with certain advantages over competing technologies:
- High permeability shielding for wireless charging receiving coils
1. Permeability: to 24
2. Resistivity: > 10 MΩ at 100 V
3. Core loss: 4000 mW/cc at 500 gauss, 250 kHz
4. Magnetic saturation: 50 % at 4000 gauss (to 350 Oe)
- High saturation powered iron - not affected by permanent locating magnets
- Durable construction
- Elimination of charging interface connectors that can corrode or leak when cleaning/disinfecting
- A single charging location for multiple devices regardless of manufacturer
- The ability to make custom sizes and shapes to fit almost any WPC compliant device.
- Compliant to RoHS Directive 2002/95/EC
IWAS-4832FF-50 - 1€ WAS-3827EC-50
The IWAS style receiver coil is manufactured starting with a very thin, pressed powdered iron wafer. A special, flat, magnet wire coil designed to minimize copper losses and maximize flux transfer is assembled onto the wafer. Leads from the coil are stripped and tinned for easy connection into the customer’s circuit. The completed IWAS receiver coil is then integrated into the back cover of a portable medical electronic device and connected to the communication/charging circuitry. The device is now ready to be placed on any Qi compliant charging station.
Testing
Wirelessly charged medical devices will require independent laboratory verification for electromagnetic compatibility. Some of the standards that are applicable are:
- FFC parts 15 and 18
- IC ICES-001
- IC Radio Standards Specification (RSS)
- EU EMC Directive
- R&TTE Directive
Conclusion
Wireless charging is no longer at our doorstep, it has a foot in the door. It started with smaller devices, like cell phones, and is now expanding to medical and other portable devices – even electric vehicles. The IWAS receiver coil will open the door to efficient and reliable charging of your mobile medical devices.
About the author
Nick Schade is Senior Product/Process Engineer at Vishay Intertechnology, Inc., Inductors Division. He can be reached at Nick.Schade@Vishay.com.
|
|
|
|
|
Navigate to related information