Power Management
From the Editor: April 2015
Posted in Features, Products, Power Management, Power Supplies, Motors & Drives on Wednesday, 01 April 2015
Products of the Year Named and Your Chance to Create the Future   In December, we asked Medical Design Briefs readers to select the one product from our 12 Products of the Month that you thought was the most significant new introduction to the design engineering community in 2014. Thank you to all of our readers who voted and chose two winners for the 2014 Medical Design Briefs’ Readers’ Choice Product of the Year:
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0T Series – Watertight Connector
Posted in Products, Electronic Components, Electronics, Power Management, Power Supplies on Wednesday, 01 April 2015
LEMO USA, Inc., Rohnert Park, CA, introduces the 0T Series Connector, a small sized watertight connector using the same original LEMO Push-Pull technology. Based on the LEMO B Series, the 0T Series Connector includes a special construction with an inner sleeve and extra sealing to enable IP68 water protection. The 0T Series is available in 2- to 9-contact configurations. Contacts can be terminated by soldering to the wire, crimping onto the wire, or directly to a PCB. For Free Info, Visit http://info.hotims.com/55588-175
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International Power Cords and Cord Sets
Posted in Products, Electronic Components, Electronics, Power Management, Power Supplies on Wednesday, 01 April 2015
Qualtek, Mentor, OH, announces that it now fully stocks a comprehensive selection of 2- and 3-conductor North American power cords, international power cords, and hospital-grade power cords in various configurations. A wide selection of plugs and connectors are available with various cable jackets including outdoor rated, colors, temperature rating, lengths, and shielding. Custom configurations, value added termination, and strain reliefs are available upon request. For Free Info, Visit http://info.hotims.com/55588-176
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Reducing Power-On/Off Glitches in Precision DACs
Posted in Briefs, Power Management, Motors & Drives on Wednesday, 01 April 2015
Voltage glitches are common in a signal chain path, especially when the system is being powered up or down. Depending on the peak amplitude and glitch duration, the end result in the system output can be catastrophic. One example is an industrial motor control system where a digital-to-analog converter (DAC) drives the motor drivers to control motor spin. If the glitch amplitude is higher than the motor driver’s sensitivity threshold, the motor could be spinning without control in any direction when the system is powered up/down.
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Servo Drive
Posted in Products, Power Management, Power Transmission on Wednesday, 01 April 2015
Elmo Motion Control (Nashua, NH) offers the NANO Gold Twitter servo drive that delivers up to 4000 Watts of qualitative power, current up to 50A at 100VDC, and up to 15A/200V with advanced servo capabilities and support for EtherCAT or CANopen networking communication. It weighs 18 grams, is less than 13 cm3 in volume, and complies to safety, EMC, and environmental standards. For Free Info Visit http://info.hotims.com/55588-315
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Isotope Beta-Battery Approaches for Long-Lived Sensors
Posted in Briefs, Power Management, Sensors on Wednesday, 01 April 2015
The energy density of isotopes enables long-life electronics in sensor network applications. Army Research Laboratory, Adelphi, Maryland The energy density of isotopes exceeds that of chemical energy storage by six orders of magnitude. Isotopes are used in many commercial applications, and are produced and available at modest prices. The power requirements of many sensors and communications equipment can greatly reduce the power requirements of many devices such as sensors, light sources, and transmitters. Chemical batteries are the mainstay of power for these devices. However, chemical batteries have limited lifetimes. This makes remote use and replacement difficult for applications extending the lifetime use.
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Using Surge Testers for Design Verification and Production Testing
Posted in Features, Electronic Components, Power Management, Power Supplies, FDA Compliance/Regulatory Affairs, Measuring Instruments, Monitoring on Sunday, 01 March 2015
Not only are medical devices expected to function as intended, they must meet ergonomic, safety, FDA and functional requirements. They must be designed to function in adverse environments; sometimes in the operating room; sometimes in an emergency vehicle for example. If a device is patient connected, it is also expected to function within proscribed parameters in the presence of a defibrillation pulse. These parameters differ depending on the type of device. All devices must pass an isolation test designed to ensure that the pulse will not affect the device’s signal input part/signal output part (SIP/SOP) ports; and effective with the Third Edition of IEC 60601-1, they must demonstrate that they absorb less than 10 percent of the defibrillation pulse. ECG monitoring equipment either for hospital (IEC 60601-2-27) or emergency use (IEC 60601-2-25) is additionally subject to performance requirements after a defibrillation pulse is applied.
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