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Recommended Book
Switching Power Supplies A to Z
Switching Power Supplies A to Z
By Sanjaya Maniktala
Newnes
Price: $45.00

Home » Power
Enermax Galaxy 1000 W Power Supply
Author: Gabriel Torres
Type: First Look Last Updated: August 21, 2006
Page: 3 of 9
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A Look Inside Galaxy 1000 W

We decided to disassemble this power supply to see what makes it different from other high-end power supplies. Please read our Anatomy of Switching Power Supplies tutorial to understand how a power supply works inside and to compare this power supply to others.

In this page we will have an overall look, while on the next page we will discuss in details the quality and rating of the components used.

We can point out several differences between this power supply and a low-end (a.k.a. “generic”) one: the construction quality of the printed circuit board (PCB); the use of more components on the transient filtering stage; the active PFC circuitry; the use of a thermal sensor on the power diodes heatsink for controlling the fan speed and for shutting down the power supply in case of overheating; the power rating of all components; the design; etcetera.

On Figure 7 you can have an overall look from inside this power supply.

Enermax Galaxy 1000 W
click to enlarge
Figure 7: Inside Enermax Galaxy 1000 W.

What immediately caught our eye was the use of two transformers, meaning that this power supply has two separated secondary circuits for the main positive voltages (we will discuss this deeply later). This was expected, as it makes more sense to use two transformers than building a power supply with just one big transformer – all other high-end power supplies we’ve seen to date use just one transformer. On Figure 7 you can also see a smaller transformer on the right (under a transparent plastic protection), which is used by the +5VSB circuit – on all power supplies this output is produced by an independent circuitry, so this isn’t something exclusive from Enermax.

Enermax Galaxy 1000 W
click to enlarge
Figure 8: The two main transformers. On regular power supplies only one is used.

Pages (9): « 1 2 [3] 4 5 6 7 8 9 »
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