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Application Notes

Application Notes

Introductions

 

Every model undergoes rigorous aerodynamic analysis and anechoic chamber test to achieve minimum noise under high airflow and air pressure conditions.

High precision maintenance-free ball bearing system provides superb reliability.

Frame and fan blade meet UL 94V-0 flammability rating.

Every model features locked rotor protection and polarity protection, and offers optional frequency generator or rotation detector function.

All DC fans are 100% balanced to guarantee low vibration and excellent durability.

Automatic multi-axes winding, surface-mount machine and highly automated assembly lines enable mass production and consistent quality.

UL, CSA, VDE approved.

Part Number Definition

AFB 12 12 H E   -   B F 00
 1   2   3   4   5       6   7   8 

1. SERIES CODE :

AFB, AFC, AFL, ASB, AUB, AUC, BCB, BFB, BFM, BFN, BSB, BUB, EFB, EFC, EUB, FA, FC, FFB, FFC, GFB, GFC, GFM, KDB, KFB, KSB, MR, ND, PFB, PFC, PFM, QFR, SFB, TCA, TFA, TFC, TFD, THA, THB, and THD.

2. FRAME DIMENSION:

02 : 125 x 38 x 45 mm
03 : 30 mm SQUARE or 180 x 38 x 45 mm
032 : ø32 x 9 mm
035 : 35 mm SQUARE
04 : 40 mm SQUARE or 42 x 45 x 19 mm
045 : 45 mm SQUARE
05 : 50 mm SQUARE or 51 x 51 x 15 mm
06 : 60 mm SQUARE
07 : 70 mm SQUARE or 75 x 75 x 30 mm
08 : 80 mm SQUARE
09 : 92 mm SQUARE
10 : 97 x 94 x 33 or ø100 x 46.8 mm
12 : 120 mm SQUARE or 125 x 126 x 34 mm
or 120 x 120 x 32 mm
13 : 127 mm SQUARE or ø133 x 61.5 mm
14 : 140 mm SQUARE
15 : 172 x 150 mm
16 : 159 x 165 x 40 mm
17 : ø172 mm or ø175 x 69.0 mm

3. OPERATION VOLTAGE :

03 : DC 3V
05 : DC 5V
12 : DC 12V
18 : DC 18V
24 : DC 24V
48 : DC 48V
50 : DC 50V
54 : DC 54V
60 : DC 60V

4. SPEED (RPM) :

L : LOW,   M : MEDIUM,    H : HIGH,
HH : EXTRA HIGH,    VH : VERY HIGH,
SH : SUPER HIGH,    EH : EXTERNAL HIGH

5. FRAME THICKNESS:

A : 10 mm
C : 13 mm
B : 15 mm
D : 20 mm
(BLANK) : 25.4 mm
N : 28 mm
F : 32 mm
E : 38 mm or RIGHT SIDE EXHAUST (INTAKE VIEW FOR BFB SERIES)
G : 50.8 mm or 48mm
S : 55 mm
T : 69.0 mm
W : 76.2 mm
GH : GRAND HIGH SPEED
UH : ULTRA HIGH SPEED
DH : DRASTIC HIGH SPEED
XH : EXTREME HIGH SPEED

6. FRAME TYPE:

(BLANK) : FLANGE TYPE
B : RIB TYPE (10mm, 13mm, 15mm, 20mm THICKNESS)
M : METAL FRAME

7. SIGNAL OUTPUT :

F : FREQUENCY GENERATOR OUTPUT
(SPEED SENSOR) OR TACH OUTPUT
R : ROTATION DETECTOR OUTPUT
(FAILURE DETECTOR)

8. SIGNAL OUTPUT VOLTAGE :

00 : VCC (OPEN COLLECTOR)

 

Noise Measurement

noise measurement

NOISE IS MEASURED AT RATED VOLTAGE IN ANECHOIC CHAMBER IN FREE AIR WITH LARSON DAVIS AND WITH MICROPHONE AT A DISTANCE OF ONE METER FROM THE FAN INTAKE. REFER TO ANSI-S12.10 AS SHOWN BELOW:

SEMI ANECHOIC CHAMBER LEVEL
Semi Anechoic Chamber for ISO 7779
Residual Background Noise Level: 15.0 dB (A)
Lowest Cutoff Frequency (Fco): 100 Hz

Performance Measurement

THE PERFORMANCE INCLUDING AIR FLOW AND AIR PRESSURE MEASURED AT RATED VOLTAGE IN DOUBLE CHAMBER IS MEASURED ACCORDING TO AMCA 210 STANDARD AS SHOWN BELOW:

Frequency Generator O/P: (F00)

Frequency generator function is activated by an internal IC for customer's application.
Electrical schematic:

 

• CUSTOMER'S CIRCUIT
Vcc = From +5 To +28 VDC (Generally using +12 or +24 VDC)
Ic = 5 mAmax.
R = V/I (Output "R" value calculation)
• SUPPLY A WAVEFORM:

 
 

N=R.P.M. (Rotation speed will be different for various models
L/M/H/HH/VH/SH)
TS=60/N (Sec)
* Voltage level after blade locked
* 4 POLES OR 8 POLES

• OUTPUT LEVEL:
High = Vcc 10%
Low = 0~0.5V
Ic = 5 mAmax.

• APPLICATION:

 

• FUNCTIONS:

By means of waveform & customer's design, schematic can reach alarm function, either in the form of buzzing or LED flashing.

Adjust rotation speed.

When power supply output voltage level decreases, it will result in the lowering of fan rotation speed. The irregular situation will be controlled by using F.G. O/P through P/S circuit to increase the output voltage and result in a stable rotation speed.

 

Rotation Detector O/P (R00)

Rotation detector function is activated by an internal IC for customer's application.
• Electrical schematic:

 

CUSTOMER'S CIRCUIT
Vcc = From +5 To +28 VDC (Generally use +12 or +24 VDC)
Ic = 5 mAmax.
R = V/I (Output "R" value calculation)
• SUPPLY A WAVEFORM:

 
 

OUTPUT LEVEL:
High = Vcc 10%
Low = 0~0.5V
Ic = 5 mAmax.

• APPLICATION:

 

• FUNCTIONS:

By means of waveform & customer's design, schematic can reach alarm function: either in the form of buzzing or LED flashing.

 

Frame Type

Temperature Control: "Senseflow"

With temperature controlled fan, the RPM can be controlled by on board or off board thermistor. The RPM and temperature range is subject to custom request.

PWM Control

In Pulse Width Modulated speed control (PWM), a fixed frequency square wave is applied to the speed control lead wire of the fan. The ratio of the on time vs. the PWM period is proportional to the RPM.

PWM INPUT VOLTAGE RANGE:

High level= 2.8 to 20 VDC

Low level= 0 to 0.4 VDC

PWM INPUT CURRENT (IPWM) RANGE:

40uA to 20mA

To control signal line of the fan shall be able to accept a 30Hz to 30kHz.

The preferred operating point for the fan is 0%~100% of duty cycle.

Bearing Type

Sleeve Bearings - also known as journal bearings or rifle bearings are very common type of bearing system. The system is dependent upon the lubricants used to keep friction from degrading the performance. The bearing works by having a post rotate within a can filled with lubricant.

Ball Bearing - also known as a rolling element bearing is dependent upon a shaft rolling over rotating balls mounted in an assemblage.

Photo is linked from Wikipedia, the free encyclopedia.

Harsh Environments

There are may types of harsh environments. These test conditions for these environments is defined by IEC 69529 and the International Protection Rating Scale . The classifications are stated as IP NN. Delta manufacturers a wide range of fan and blowers which comply to the standards. Most common are IP55 and IP56.

For more information, click here

 

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