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參數(shù)資料
| 型號(hào)： | PWR-82521-140 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 18 A, DMA41 |
| 封裝： | DIP-41 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 150K |
| 代理商： | PWR-82521-140 |
6
June 1, 2000; Data Device Corp.
EXTERNAL PI REGULATOR
10.0 K
R1
4700 pF
C1
1 MEG
ERROR
AMP INPUT
COMMAND
OUT
CURRENT
MONITOR OUT
R2A
10.0 K
R2B
10.0 K
-
+
O
ERROR
AMP OUT
32
35
33
34
470 pf
R7
FIGURE 6A. STANDARD PI CURRENT LOOP
200
A, dB
100
0
-100
180
θ, degree
90
10Hz
100Hz
1.0KHz
10KHz
100KHz
1.0MHz
10MHz
100MHz
FREQUENCY
0
FIGURE 6B. PI REGULATOR FREQUENCY RESPONSE
HALL-EFFECT SENSOR PHASING vs.
MOTOR BACK EMF FOR CW ROTATION (120
° Commutations)
300
°
0
°
60
°
120
°
180
°
240
°
300
° 360°/0°
60
°
V
AB
V
BC
V
CA
BACK EMF
OF MOTOR
ROTATING
CW
HA
HB
HC
In Phase
with V
AB
In Phase
with V
BC
In Phase
with V
CA
In Phase
with V
AC
(60)
FIGURE 4. HALL PHASING
S
HC
HA
120
°
N
HB
120
°
N
HC
120
°
REMOTE POSITION SENSOR (HALL) SPACING FOR
120 DEGREE COMMUTATION
60
°
60
°
REMOTE POSITION SENSOR (HALL) SPACING FOR
60 DEGREE COMMUTATION
S
HA
HB
HC
FIGURE 5. HALL SENSOR SPACING
HC must be inverted as shown in FIGURES 4 and 5. In FIGURE 4,
the Hall sensor outputs are shown with the corresponding volt-
age they are in phase with.
Hall Input Signal Conditioning: When the motor is located
more than two feet away from the PWR-82520 controller the Hall
inputs require filtering from noise. It is recommended to use a
1k
resistor in series with the Hall signal and a 2000 pF capac-
itor from the Hall input pin to the Hall supply ground pin as shown
in FIGURE 12 and 13.
COMPENSATION
The PI regulator in the PWR-82521 can be tuned to a specific
load for optimum performance. FIGURE 6A shows the standard
current loop configuration and tuning components, and FIGURE
6B shows the frequency response for the PI regulator. By adjust-
ing R1, R2 and C1, the amplififer can be tuned. The value of R1,
C1 will vary, depending on the loop bandwidth requirement.
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