PRODUCTS POWER ELECTRONICS 25 TO 30W MEDICAL WALL MOUNT POWER SUPPLIES
((EU) 2019/1782) and DoE Level VI efficiency standards. The series is suited for home healthcare, hospital, clinical, dental and life sciences applications for monitoring, imaging and diagnostic equipment. Six output voltages are available;
T
DK Corporation has introduced its WMM30 series of 25 to 30W
medical wall mount power supplies. Certified to the medical safety standards IEC 60601-1 and EN 60601-1-11 and compliant to EN 60601-1-2 Edition 4 for EMC, the products have a Class II input requiring no earth ground. The devices also meet the EU Tier 2
5V, 9V, 12V, 15V, 18V and 24V and the WMM has a wide 80 to 264Vac input. The units have four interchangeable AC input plugs suitable for Europe, North America, the UK and Australia, which are sold separately. The output cable is terminated with a straight 5.5 x 2.1 x 12mm (OD x ID x L) connector, with other types of connectors and cable assemblies available. To meet the EU and US efficiency
standards, the series has an average efficiency level of >85% to >87.7% (model dependant) and an off-load power consumption of <75mW. The rugged plastic enclosure is vent- free (IP22) and measures 96.7mm in length, 58mm in width and 43.25mm in depth. The WMM30 operates in ambient temperatures of -25 to 70°C, derating linearly to 50% load from 40 to 70°C. The WMM30 is certified to
IEC/ES/EN 60601-1, meets IEC 60335-1 (Household Appliances) and carries the CE mark for the Low Voltage, EMC and RoHS Directives. The input to output isolation is 4,000Vac (2 x MOPP) and the leakage current less than 50µA.
www.jp.lambda.tdk.com/en/
LOW-INDUCTANCE SILICON CARBIDE (SIC) POWER MODULE
SILICON CARBIDE POWER MODULE AND PROGRAMMABLE GATE DRIVER KIT
As advances in the electrification of transportation continue, Microchip Technology Inc. has responded with its AgileSwitch digital programmable gate driver and SP6LI SiC power module kit, to help designers adopt Silicon Carbide (SiC) power devices. The AgileSwitch digital programmable gate driver and SP6LI SiC
power module kit speeds development from evaluation through production, eliminating the need to procure power modules and gate drivers separately – including gate drivers that are qualified for end- product production. Microchip’s portfolio of 700, 1200 and 1700V SiC Schottky Barrier
Diode (SBD)-based power modules utilises its newest generation of SiC die. In addition, its dsPIC Digital Signal Controllers deliver performance, low power consumption and flexible peripherals. The AgileSwitch family of digital programmable gate drivers further accelerates the process of moving from the design stage to production. This combination of SiC power module and software-configurable gate driver features augmented
switching technology that enables designers to influence dynamic issues including voltage overshoot, switching losses and electromagnetic interference. Using a Windows-based computer interface, this “configure-at-a-click” method may be used throughout the design process.
www.microchip.com
Laird Thermal Systems has developed a thermoelectric module series that is rated for high temperature in emerging optoelectronic applications. The HiTemp ETX Series thermoelectric cooler can sustain temperatures up to 150°C, exceeding most outdoor applications. It is assembled with thermoelectric materials that boosts cooling capacity by up to 10% compared to traditional thermoelectric coolers. These solid-state heat pumps feature a higher thermal insulating barrier when compared to standard thermoelectric materials creating a maximum temperature differential (Delta T) of up to 83°C. The enhanced thermoelectric materials are
designed to prevent performance degradation in high temperature environments, a common problem with standard grade thermoelectric coolers. This series maintains a high coefficient of performance (COP) to minimise the amount of input power required to operate and reduces the heat rejection requirement to the hot side, critical in poor heat sinking applications. Many temperature sensitive optoelectronic
devices require active cooling to keep below their maximum operating temperature in outdoor environments. Common applications include LiDAR and CMOS sensors for autonomous systems in vehicles and drones, digital light processors (DLP) used in 3D machine vision and advanced lighting systems, and optical transceivers.
lairdthermal.com/hitemp-etx-series
GROWTH IN HYDROGEN FUEL CELLS DRIVES DEMAND FOR GENERATION RESOLVED BY TWO RANGES
Rapid growth in the demand for hydrogen is expected over the coming years as new mass markets emerge for passenger cars and industrial vehicles powered by hydrogen fuel cells. Hydrogen is also expected to be utilised in the mass transport sector for trains and bus fleets and, potentially HGV fleets, where they are based
out of one depot which can have an H2 plant servicing all vehicles. Renewable energy is likely to be converted directly into H2 and stored at source to support the power grid during high demand periods. Generating H2 is a very power-hungry
process, sometimes requiring megawatts of power. Powerstax achieves this by combining multiple power units which adds flexibility as this can be configured for separate cells, e.g. 4 x 250kW units for a 1MW system. Two product ranges from Powerstax for
hydrogen gas production systems include its own Drake brand of high-power transformer rectifiers. These systems may be specified with ramp,
current, voltage and time control using a PLC or analogue controls and power ratings from 10kW
28
to 500kW for individual units are available. Drake power systems are available with high IP ratings and may be fitted with heat exchangers or water cooling. All products are designed in the UK and supplied and manufactured in its own facility. For smaller, scalable, higher efficiency
systems Powerstax can also supply the KraftPowercon range of switched mode modular power solutions. The compact units are installed and serviced from the front and may be mounted side by side or stacked on top of each other, making them easy to fit into the end system design and optimising floor space. Each rectifier consists of up to ten modules and two or more stacks can be connected together to allow higher output currents, up to 24kA, and voltages, up to 120V DC.
www.powerstax.com
SEPTEMBER 2020 | ELECTRONICS / ELECTRONICS
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