How to reduce the sound noise from an electronic rack?
Will using composite enclosure reduce noise?
CAn we use any sound absorbing pads?
What is the most irritating noise?
Will fans create lot of noise?
What is the effect electronic IC on sound leves?
Friday, June 27, 2008
Wednesday, June 11, 2008
Military DC DC power supplies
Aerospace and Military power supplies have always been subjected to stringent requirements including transients, spikes, EMI, hold-up, monitoring specifications. As a result majority of power supplies have been designed specifically with discrete components.
Since the beginning of the 90’s with the introduction of the COTS (Commercial Off-The-Shelf) philosophy in US and modular power architecture the use of standard modules has become of more importance to design complex power supplies.
The standard input voltages in Aerospace and Military applications are 24, 28 VDC or 115 VAC within a permanent variation of 16-40 VDC or 70-180 VAC to meet worldwide standards. Drop out down to 0VDC and transients have also to be covered. EMI compliance is of primarly importance and are described in the widely used MIL-STD-461 or DO-160 standard.
To cope with these particular requirements, DC DC Converter proposes typical Off-The-Shelf modular power architecture :
• Qualified front filters to allow compliance with the MIL-STD-461D or DO-160D, ..., EMI requirements
• Essential functions such as drop-out voltage recovery, transient and spike protections as per MIL STD-704A, MIL-STD-1275 or DO-160D are handled by standard "Pre-Regulator" front-end product :
• Power factor corrected 115VAC to 28VDC converters allow easy board intermediate bus configurations.
• Monitoring and hold-up functions are provided by DC DC Converter hold-up module to sustain bus losses together with fault and advisory signals :
• For the heart of the power system, DC DC Converter proposes a complete series of low profile, cost-effective and high performance DC/DC modules that come in multiple combinations of input voltages, output possibilities and power ratings :
Whatever your power system´s need, DC DC Converter has a modular architecture using standard products to provide an instant solution to a wide range of applicationsfrom on-board computers, man-machine interface, communication systems, ...
Since the beginning of the 90’s with the introduction of the COTS (Commercial Off-The-Shelf) philosophy in US and modular power architecture the use of standard modules has become of more importance to design complex power supplies.
The standard input voltages in Aerospace and Military applications are 24, 28 VDC or 115 VAC within a permanent variation of 16-40 VDC or 70-180 VAC to meet worldwide standards. Drop out down to 0VDC and transients have also to be covered. EMI compliance is of primarly importance and are described in the widely used MIL-STD-461 or DO-160 standard.
To cope with these particular requirements, DC DC Converter proposes typical Off-The-Shelf modular power architecture :
• Qualified front filters to allow compliance with the MIL-STD-461D or DO-160D, ..., EMI requirements
• Essential functions such as drop-out voltage recovery, transient and spike protections as per MIL STD-704A, MIL-STD-1275 or DO-160D are handled by standard "Pre-Regulator" front-end product :
• Power factor corrected 115VAC to 28VDC converters allow easy board intermediate bus configurations.
• Monitoring and hold-up functions are provided by DC DC Converter hold-up module to sustain bus losses together with fault and advisory signals :
• For the heart of the power system, DC DC Converter proposes a complete series of low profile, cost-effective and high performance DC/DC modules that come in multiple combinations of input voltages, output possibilities and power ratings :
Whatever your power system´s need, DC DC Converter has a modular architecture using standard products to provide an instant solution to a wide range of applicationsfrom on-board computers, man-machine interface, communication systems, ...
Wednesday, June 4, 2008
Display for Military applications
We touch up on the display requirement for the Military vehicles.
Since these are rugged vehicles we need a rugged flat panel display.
The operating and storage temperature, IP rating,Shock and vibration, EMI,humidity and other issues are more important than the display features.
Ther may be requirement for video mixing also.
All these are very much different requirement from the generally available LCD panels.
Baytek,Barco and IRTS are the main manufactureres of flat panel displays for the military field.
Since these are rugged vehicles we need a rugged flat panel display.
The operating and storage temperature, IP rating,Shock and vibration, EMI,humidity and other issues are more important than the display features.
Ther may be requirement for video mixing also.
All these are very much different requirement from the generally available LCD panels.
Baytek,Barco and IRTS are the main manufactureres of flat panel displays for the military field.
Tuesday, June 3, 2008
C4I - Command Console Designs
C4I consoles for command,communication,control,intellegence plays an important role in the military applications.
There are typically 3 to 4 types of consoles, namely twin displays or single displays. MIL hand book 1472 F gives a good picture of the design features for the console design. Generally consoles will have some 19" rack space at the bottom of the console for the display compute nodes.
The selectio of view angle,accesibilty and easy to operate are the main design criteria we need to take care in a console design.
There are typically 3 to 4 types of consoles, namely twin displays or single displays. MIL hand book 1472 F gives a good picture of the design features for the console design. Generally consoles will have some 19" rack space at the bottom of the console for the display compute nodes.
The selectio of view angle,accesibilty and easy to operate are the main design criteria we need to take care in a console design.
Subscribe to:
Posts (Atom)
