Power Management
Reducing Power-On/Off Glitches in Precision DACs
Posted in Briefs, Power Management, Motors & Drives on Tuesday, 31 March 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 Tuesday, 31 March 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 Tuesday, 31 March 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 Saturday, 28 February 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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Power Entry Modules for V-Lock Cord Retaining
Posted in Products, Electronic Components, Power Management on Saturday, 28 February 2015
SCHURTER Inc., Santa Rosa, CA, announces its compact KFA and DA22 series power entry modules, with mating V-Lock cord sets, which are ideal for use in medical devices. The V-Lock compatible feature prevents unintended disconnection of the power from the equipment. The cord set safely latches into a notch in the plastic housing of the modules.
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Self-Powered Intelligent Keyboard Could Provide Additional Security
Posted in News, Board-Level Electronics, Computers, Electronic Components, Electronics, Power Management, Energy Harvesting on Tuesday, 17 February 2015
By analyzing such parameters as the force applied by key presses and the time interval between them, a new self-powered, non-mechanical, intelligent keyboard could provide a stronger layer of security for computer users. The self-powered device generates electricity when a user’s fingertips contact the multi-layer plastic materials that make up the device.
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Automotive Circuit Protection Using High-Reliability TVS Diodes
Posted in Briefs, Power Management on Saturday, 31 January 2015
Diode technology eliminates transient surges and enhances vehicle safety. Littelfuse, Chicago, Illinois Designing automotive electronics presents numerous technical challenges, including the need to protect against electrical hazards. The three major sources of electrical hazards in automotive systems are electrostatic discharge (ESD), switching loads in power electronics circuits, and lightning. Overcoming these transient surges that can harm the vehicle’s electronics, whether under the hood or in the cabin, is one of the biggest obstacles of system design.
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