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參數(shù)資料
| 型號(hào)： | PW-82520R0-101L |
| 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, 10 A, DFP43 |
| 封裝： | HYBRID, FP-43 |
| 文件頁(yè)數(shù)： | 15/16頁(yè) |
| 文件大?。?/td> | 219K |
| 代理商： | PW-82520R0-101L |
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Data Device Corporation
www.ddc-web.com
PW-82520R
F-03/06-0
SUPPLY GND
SUPPLY GND is the return for the VDR,VEE, VDD supplies. The
phase current sensing technique of the PW-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 with 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 PW-
82520R are 10K pull-up resistors tied to +5Vdc on each Hall
input.
The PW-82520R will alternately operate with Hall phasing of 60°
electrical spacing. If 60° commutation is used, then the output of
HC must be inverted as shown in FIGURES 4 and 5.
FIGURE 4 illustrates the Hall sensor outputs along with the cor-
responding back emf voltage they are in phase with.
HALL INPUT SIGNAL CONDITIONING
When the motor is located more than two feet away from the PW-
82520R controller or is in a noisy electrical environment the Hall
inputs require filtering from noise. It is recommended to use a
100
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 FIGURES 6 and 7.
PHASE A, B, C
These are the power drive outputs to the motor and switch
between VBUS+ Input and VBUS- Input or become high imped-
ance (see TABLE 3).
ENABLE
The ENABLE input is an active low (L) logic signal that enables
or disables the internal PWM. In the disable mode (H), 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.
TACH OUT
The TACH OUT provides a tachometer signal that is a square
wave with a frequency relative to motor speed and is derived
from the three Hall inputs HA, HB, HC. The tachometer circuitry
combines these three signals into a single pulse train as a 50%-
duty-cycle pulse. There are three pulses that occur every 360
electrical degree. The number of pulses per motor revolution is
formulated below:
DIR OUT
The DIR OUT indicates the direction the motor is rotating, clock-
wise (CW) for a LO, or counterclockwise (CCW), indicated as a
logic HI.
CURRENT MONITOR OUT
This is a bipolar analog output voltage representative of motor
current. The CURRENT MONITOR OUT will have the same scal-
ing (± 4V for ± full scale current) as the COMMAND IN inputs.
SYNC IN
This input, as shown in FIGURE 9, is used to synchronize the
PWM switching frequency with an external clocking device. The
PWM switching frequency can be pulled to up-to 20% faster than
its free running frequency.
PWM IN
The PWM comparator inputs are used to control the PWM pulse
width. PWM OUT or an external triangular waveform is connect-
ed to this pin.
Tf x 60
Pr
Pr =
x 3 (e.g., 6 pulses/revolution for a 4 pole motor)
P
2
RPM =
P = number of motor poles
Pr = number of pulses per revolution
Tf = Tach output frequency cycles/second
The motor RPM is:
where:
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
WARNING: Never apply power to the hybrid without connect-
ing either PWM OUT or an external triangular waveform to
PWM IN! Failure to do so may result in one or more outputs
latching on.
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