The motor was originally designed to power submarine thrusters, and has subsequently gone into production in a range of sizes from a 50mm bore 15W model up to a 15kW 300mm design
Power
Samsung uses National technology to cut mobile power by 25%
National Semiconductor has announced that Samsung has licensed the power management technology it developed in partnership with ARM for optimising processor power efficiency in mobile phones
Digital control of power supplies cuts cost
For low-power applications - those that require 4W or less - linear-regulated power supplies have historically been a popular choice thanks to their simplicity and low cost
UK firm powers wireless terminal with vibrations
Perpetuum, the Southampton-based developer of energy-scavenging technology, has released an improved version of its vibration powered micro-generator
Economy class is best for power supply design
High efficiency power supplies provide a long term cost saving for customers, argues Brendan Daly from Analog Devices
Mosfets benefit from bottom side cooling
The need to carefully manage the heat energy dissipated in Mosfets has led to a study of cooling techniques by Philips Semiconductors
TDK-Lambda power supplies go digital
TDK-Lambda is moving to all-digital control in prototype DC-DC converters including a 0-25A quarter brick and a 1.7kW design for electric and hybrid vehicles
Enecsys seeks business expertise for power products
Cambridge start-up Enecsys, which is developing low-cost power conditioning technology, is looking to add business expertise to its existing staff of engineers as it moves forward with its products
Fuel cell bike lights pass road tests
Vancouver-based Angstrom Power has completed 5,000km of testing for its fuel cell bicycle light
Philips makes synchronous gains for notebooks
Philips is claiming a three to five per cent efficiency gain in notebook computer adapter designs using its GreenChip SR family of secondary-side synchronous rectifier controllers