參數(shù)資料
型號: AMC8500DE16
廠商: Electronic Theatre Controls, Inc.
英文描述: TWO PHASE VARIABLE SPEED FAN MOTOR CONTROLLER
中文描述: 兩相流變速風扇電機控制器
文件頁數(shù): 24/27頁
文件大?。?/td> 648K
代理商: AMC8500DE16
P
P
Preliminary Specification
Andigilog, Inc. 2006
www.andigilog.com
August 2006 - 70A04018
aMC8500
In applications that require increased system reliability, multiple cooling fans can be employed for redundancy. In this example two
aMC8500s are cross coupled so that each device drives a fan while monitoring operation of the other. Resistors R2 and R3 program the
Speed Control inputs to operate each fan at a 50% speed. During normal operation, the Frequency Generator / Rotor Lock outputs,
Pin 15, continuously discharges their respective C1 capacitors. In the event that one fan should fail, Pin 15 will allow R1 to charge C1
above 2.0 V. This causes the Op Amp output to drive the Minimum Speed Set input above 3.0 V for maximum speed on the remaining
fan. The values for resistors R2 and R3 are chosen so that each Reference Output is loaded in excess of 2.0 mA in order to disable the
automatic power down feature.
Figure 43- Dual Fan Redundancy
R2
590
R1
1.0 M
R2
590
- 24 -
Timers
Power Down
Ref
Hall Amp
Commutation
H
Drives
12 V
Current Limit
Op Amp
Osc
Min Spd
PWM
Digital
Detector
TSD
UVLO
Latch
R
Q
S
16
1
15
14
10
6
9
8
7
5
11
13
2
PWM
Logic
10
μ
A
3
4
12
Timers
Power Down
Ref
Hall Amp
Commutation
H
Current Limit
Drives
12 V
Op Amp
Osc
Min Spd
PWM
Digital
Detector
TSD
UVLO
Latch
Q
R
S
16
1
15
14
10
6
9
8
7
5
11
13
2
PWM
Logic
10
μ
A
3
4
12
787
C1
1.0
R3
787
C1
1.0
R1
1.0 M
M
M
10 nF
10 nF
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