參數(shù)資料
型號(hào)： PWR-82520R3-11O
廠商： DATA DEVICE CORP
元件分類(lèi)： 運(yùn)動(dòng)控制電子
英文描述： BRUSHLESS DC MOTOR CONTROLLER, 4 A, DMA41
封裝： DIP-41
文件頁(yè)數(shù)： 11/13頁(yè)
文件大?。?/td> 163K
代理商： PWR-82520R3-11O
7
December 6, 1999 Data Device Corporation
P
PR
RE
EL
LIIM
MIIN
NA
AR
RY
Y
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
470 pf
R7
ENABLE
The Enable input enables or disables the internal PWM. In the
disable mode, the PWM is shut down and the outputs, Phase A,
Phase B and Phase C, are in an "off" state and no voltage is
applied to the motor.
VBUS+
The VBUS+ supply is the power source for the motor phases. For
100V-rated device, the normal operating voltage is 28Vdc and
may vary from +18 to +70Vdc with respect to VBUS-. The power
stage MOSFETS in the hybrid have an absolute maximum
VBUS+ supply voltage rating of 100V. The user must supply suf-
ficient external capacitance or circuitry to prevent the bus supply
from exceeding the maximum recommended voltages at the
hybrid power terminals under any conditions.
The VBUS should be applied at least 50ms after VDD and VEE to
allow the internal analog circuitry to stabilize. If this is not possi-
ble, the hybrid must be powered up in the "disabled" mode.
VBUS-
This is the high current ground return for VBUS+.This point must
be closely connected to
SUPPLY GND for proper operation of
the current loop.
CURRENT MONITOR OUT
This is a bipolar analog output voltage representative of motor
current. The CURRENT MONITOR OUTPUT will have the same
scaling as the COMMAND IN input.
COMPENSATION
The PI regulator in the PWR-82520X can be tuned to a specific
load for optimum performance. FIGURE 6 shows the standard
current loop configuration and tuning components. By adjusting
R1, R2 and C1, the amplifier can be tuned. The value of R1, C1
will vary, depending on the loop bandwidth requirement.
FIGURE 6. STANDARD PI CURRENT LOOP
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
GROUNDS
SUPPLY GND: SUPPLY GND is the return for the VDR,VEE, VDD
supplies. The phase current sensing technique of the PWR-
82520X requires that VBUS- and SUPPLY GND be connected
together externally (see VBUS- supply).
COMMAND GND: COMMAND GND is used when the command
buffer is used single-ended and the COMMAND IN- or COM-
MAND IN+ are tied to COMMAND GND.
CASE GND: This pin is internally connected to the hybrid case.
In some applications the user may want to tie this to Ground for
EMI considerations.
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