9|SANYO DENKI Technical Report No.13 May 2002
1. Introduction
Recently information and telecommunications equip-
ment, ex. server and telecom switches, have become
smaller in size, higher in density, greater in function and
faster in speed, all leading to an increase in heating
output.
Fans used to cool this equipment require high reliabil-
ity, compact size as well as large air volume and high
static pressure.
In order to meet these demands, we have developed
“DYNA ACE” 25mm Thickness Fan (φ172×147×25.4mm
thick), which is a thin fan with a large air volume, high
static pressure, low noise and high reliability. This is an
expansion to the lineup of “DYNA ACE”.
This document introduces the outline of the product
and features.
2. Background of the Development
We already have a φ172×150×51mm thick fan (here-
after, conventional 51mm thickness) in the market as one
of the “DYNA ACE” fan series. However, now that the
applications are diversified, there is a need for a thin and
high air volume fan which is able to mount on a 1U type
(about 44mm high) fan tray, and also for effectively cool-
ing high density mounted electric circuits by filling fans
on a 19-inch rack.
To meet this need, we achieved substantial thinning
and space-saving by making the thickness half (25.4mm)
of the conventional 51mm thickness fan, and with a 147
mm width, one can arranged three “DYNA ACE” units
laterally in a 19-inch rack. To meet this need, we suc-
cessfully developed “DYNA ACE” 25mm Thickness Fan
series with the performance equivalent to or better than
that of the conventional 51mm thickness units.
3. Features of “DYNA ACE” 25mm
Thickness Fan
Fig.1 shows the “DYNA ACE” 25mm Thickness Fan.
Fig.1 “DYNA ACE” 25mm Thickness Fan
Followings are the features of this product.
(1) Thin-type
(2) Large air volume – High static pressure
(3) High reliability
(4) Optimum for cooling a 19-inch rack (EIA stan-
dard)
The “DYNA ACE” 25mm Thickness Fan (hereafter, the
developed product) is thinner than the conventional
51mm thickness, and realizes high air volume, high
static pressure and high reliability via a newly designed
wing, frame, and motor. Moreover, the modular
rack-style devices that are popular today, especially the
19-inch rack, are now able to use three developed prod-
ucts in a 19-inch rack by changing the width of the fan
from 150mm to 147mm.
3.1 Dimensions
Fig.2 shows a dimensional overview of the developed
fan.
3.2 Specifications
3.2.1 General Specifications
Table 1 shows the general specifications of the develop-
ment fan.
Rated voltages available are 12V, 24V and 48V, and
rated Rotating Speeds available are H speed (3300 min
-1
),
F speed (3000 min
-1
), M speed (2700 min
-1
) and L speed
(2400 min
-1
), in addition to the high air volume specifica-
tion of S speed (3500 min
-1
).
3.2.2 Air Volume vs. Static Pressure Performance
Fig.3 shows the characteristic curve of air volume vs.
static pressure property for the development fan.
3.2.3 Comparison with the Conventional 51mm
Thickness Fan
Fig.4 shows the comparison of air volume vs. static
pressure between the developed product and the conven-
tional 51mm thickness product.
The standard performance of the conventional 51mm
thickness fan is the maximum air volume of 6.4 m
3
/min
and maximum static pressure of 138 Pa (rotating speed
at 3050 min
-1
). The developed product achieved maxi-
mum air volume of 6.8 m
3
/min and maximum static
pressure of 146 Pa (rotating speed at 3500 min
-1
). There-
fore, it has achieved better performance than the stan-
dard performance of the conventional 51mm thickness
though it has half the thickness of the conventional
51mm thickness.
“DYNA ACE” 25mm Thickness Fan
Shigekazu Mitomo Kikuo Miyahara Akiyoshi Kuroda
Toshiya Nishizawa
Feature
