Trident Energy has developed multi-kW linear electromagnetic generators for wave power. Electronics Weekly spoke to Trident CEO Steve Packard to find out how these monsters of the sea work, and what they can do. In principle, they are simple: the movement of a long cylindrical multi-pole magnet through a wound armature generates power every time one moves with respect to ...
Linear Tech has introduced a dual input power prioritiser for 1.8V to 18V systems which preserves rails during brown-outs and prompts graceful shut-down on power loss. Designed to work in battery, capacitor and adaptor-powered circuits, LTC4420 is monolithic and included two 500mA 2Ω rail-switching p-channel mosfets. Crucially, there is no requirement for the back-up supply voltage to be lower than the main supply voltage. ...
Heliatek has installed the second phased of organic photovoltaic solar cells on its Singapore pilot project. The opaque organic solar film was installed on the west façade of a building called Cleantech I on steel panels with 56 2m-long films and 45 films of 3.25m-long laminated into 15 glass sheets. Prior to this, 87 soar films were mounted on glass ...
An MIT spin-out is preparing to commercialise a novel re-chargable lithium metal battery that it claims will double capacity.
According to Wolfspeed, its C2M0045170D is the industry’s first 1,700V, 45mΩ silicon carbide mosfet.
Moisture is the key to a mysterious improvement experienced in perovskite solar cells after manufacture, according to scientists at the Okinawa Institute of Science and Technology Graduate University. The change, noticed when cell are left out in air, is due to improved doping distribution in the hole transport layer – spiro-MeOTAD doped with lithium TFSI – which increases its conductivity. ...
Klaus Neuenhueskes looks at brushless DC motor control in cars and discovers that H-bridge controllers have specific advantages for designers. According to a recent report by research firm IHS, around three billion electric motors will be shipped into automotive applications in the last year. The majority (70%) were DC brushed motors while brushless DC (BLDC) and stepper motors accounted for ...
Researchers in the US have shown that 3D printed heatsinks could be lighter, smaller or better than conventional heatsinks. False-colour image of a heatsink genetically designed to cool a module dissipating 2kW The conclusion comes from two linked projects at Oak Ridge National Laboratory and the University of Tennessee Knoxville: One proves printed aluminium can at least equal and sometimes ...
Wolfspeed has cut switch resistance to 3.6mΩ in its 1,200V all-silicon carbide half-bridge. Called CAS325M12HM2, it has seven 1.2kV 25mΩ mosfets and six 1.2kV 50A Schottky diodes from Cree in each per switch position. A companion gate driver, CGD15HB62LP, is designed specifically to work with the module, including fitting within a 62mm mounting footprint. Power package inductance is 5nH, and the combination of mosfets ...
Powerbox has announced PSU that generates 110Vdc from a train traction-voltage line (700-1,500Vdc) to start traction electronics when a rail vehicle’s own battery is below minimum operating voltage. The ‘Low battery voltage start’ (LBVS) is designed for high safety isolation, will come in different versions for different power requirements and will provide a stable voltage from two seconds up to 60 ...
