PHILIPS FIGHTING TOO NOISY ...
With increasing computing power of digital equipment (PCs, laptops, rack modules, telecommunications systems, or devices slozhnobytovyh) more acutely raises questions related to the diversion of excess heat. And if the heat itself is relatively easy to take, you can do it effectively and seamlessly as possible for the user is much more difficult. So we have to work with you under-aloud audible rustling of the air flow from the rotating blades coolers inhabit our system units or blocks of flats server racks. In the latter case, the number of simultaneously rotating the CPU cooler can be tens or hundreds of units.
So it is no surprise that the producers of such equipment is constantly preoccupied with the development of more efficient systems that control heat dissipation.
Philips has announced a controller P82CF201, who with the help of built-in monitoring system of flexible working temperatures can control the speed of the two coolers, depending on the heating blown node (block). Basic chip is a new development that uses a conventional two-wire Philips cooler and not three wire (with a tachometer). Such an approach to the manufacturer, can save up to 30% of the cooler.
The controller detects the connected cooler, measuring the resistance of the stator winding it up. If one of the cooler fails (burns winding, for example), the second, automatically increases the speed. The fan speed is changed by a pulse width modulation voltage which allows the speed of the blades increase linearly, thereby reducing the maximum air flow noise (in any case, the noise does not reach the threshold of audibility discrete abruptly, but gradually and only when the temperature reaches a predetermined mark.)
