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參數資料
| 型號： | PWR-82520R3-100 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 8 A, PDMA41 |
| 封裝： | HYBRID, DIP-41 |
| 文件頁數： | 19/20頁 |
| 文件大小： | 187K |
| 代理商： | PWR-82520R3-100 |
8
Data Device Corporation
www.ddc-web.com
PWR-82520R
MAJOR ADVANTAGES
The advantage of a complementary 4 quadrant drive over a stan-
dard 4-quadrant drive is during a zero current command, zero
average current in the motor, that provides positive holding
torque to maintain position. The motor current at 50% duty cycle
is simply the magnetizing current of the motor winding. Using the
complimentary 4-quadrant technique allows the motor direction
to be defined by the duty cycle.
Relative to a given switch pair, i.e. Phase A upper and Phase B
lower, a duty cycle greater than 50% will result in a clockwise
rotation whereas a duty cycle less than 50% will result in a
counter clockwise rotation. Therefore, with the use of average
current mode control, direction can be controlled without the use
of a direction bit and the current can be controlled through zero
in a very precise and linear fashion.
The PW-82520R contains all the circuitry required to close an
average current mode control loop around a complimentary 4-
quadrant drive. The PWR-82520R use of average current mode
control simplifies the control loop by eliminating the need for
slope compensation and eliminating the pole created by the
motor inductance. Slope compensation and the pole created by
the motor inductance are two limitations normally associated
with implementing standard 4 quadrant current mode controls.
FUNCTIONAL PIN DESCRIPTIONS
VBUS+A, VBUS+B, VBUS+C
The VBUS+ supply is the power source for the motor phases.
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 sufficient external capaci-
tance 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.
VCC (+5V SUPPLY) AND VCC RTN
These inputs are used to power the digital circuitry of the hybrid.
VDR (+15V SUPPLY)
This input is used to power the gate driver circuitry for the output
MOSFETs. There is no power consumption from VDR when the
hybrid is disabled.
VDD (+5V TO +15V SUPPLY), AND
VEE (-5V TO -15V SUPPLY)
These inputs can vary from ±5V to ±15V as long as they are
symmetrical. VDD and VEE are used to power the small signal
analog circuitry of the hybrid. Please note that using ±5V supply
will reduce the quiescent power consumption by approximately
60% when compared to ±15V operation.
SUPPLY GND
SUPPLY GND is the return for the VDR,VEE, VDD supplies. The
phase current sensing technique of the PWR-82520R requires
that VBUS- and SUPPLY GND (see FIGURES 6 and 7) be con-
nected together externally (see VBUS- supply).
CASE GND
This pin is internally connected to the hybrid case. In some appli-
cations the user may want to tie this to Ground for EMI consid-
erations.
HALL A, B, C SIGNALS
These are logic signals from the motor Hall-effect sensors. They
use a phasing convention referred to as 120 degree spacing; that
is, the output of HA is in phase with motor back EMF voltage
VAB, HB is in phase VBC, and HC is in phase with VCA. Logic
“1” (or HIGH ) is defined by an input greater than 2.4Vdc or an
open circuit to the controller; Logic “0”(or LOW) is defined as any
Hall voltage input less than 0.8Vdc. Internal to the PWR-82520R
are 10K pull-up resistors tied to +5Vdc on each Hall input.
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
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| PWR-82520R3-110 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
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| PWR-82520R3-310 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
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