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參數(shù)資料
| 型號(hào)： | PW-83075P6-900 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | UNIVERSAL MOTOR CONTROLLER, 200 A, XMA |
| 文件頁數(shù)： | 24/24頁 |
| 文件大?。?/td> | 578K |
| 代理商： | PW-83075P6-900 |
9
Data Device Corporation
www.ddc-web.com
PW-8X075P6
C-05/02-250
and LOWER logic inputs must be active while entering sleep
mode then DISABLE / RESET must be held active while coming
out of sleep mode.
Note: SLEEP_MODE has an internal pull-up resistor. If the input
is not connected, it will default to logic high, turning the power
supply and the motor drive off.
VCC,VCC-RTN (INPUTS)
The VCC and VCC-RTN are power connections that supply input power
to the internal power supply, the gate drive and fault control circuits.
VBUS+, VBUS- (INPUTS)
VBUS+ and VBUS- are the high voltage power connections to the
output stage. The high voltage can be either unipolar (+V and
ground) or bipolar (+/- V). Care must be taken to ensure that the
transient bus voltage VBUS at the module terminals never
exceeds the absolute maximum supply ratings during switching
excursions.
External capacitor filtering will be required (See
DDC’s Applications Note AN/H-7).
OUTPUT (OUTPUT)
Output is the power switch output that is connected to one input
of the motor and applies VBUS+, VBUS-, or high impedance to the
motor based on the state of the control inputs. It is capable of
sourcing or sinking up to the rated output current, and can with-
stand a short circuit to VBUS+ or VBUS- without any damage by
automatically turning itself off (high impedance state).
SHORT CIRCUIT PROTECTION
The PW-8X075P6 modules have provisions for complete short cir-
cuit protection from either a hard or soft short to the VBUS+ or
VBUS- lines. Each output transistor on all PW-8X075P6 modules is
protected from a hard (direct, low impedance) short to the VBUS+
or VBUS- lines by circuitry that detects the de-saturation voltage for
that transistor during a short condition. Once a hard short circuit
condition is detected, the affected output transistor is shut down
and SC FAULT output is set active (logic low (L)). The SC FAULT
signal can be used by a controller as a signal to initiate a fault rou-
tine to reset or shut down the system. The DISABLE / RESET
input can be used to shut down the gate drivers if a short persists.
If the AUTO RESET is tied to SC FAULT, the circuit will automati-
cally reset when a fault occurs. This inactivates SC FAULT and
reactivates the output transistor within the tcycle.auto time period.
If the short is still present, the circuit will repeat the shut down and
automatically reset until the short is clear.
Protecting against a soft-short requires the addition of current
sensing PW-84075P6 modules and external circuitry. When a
soft short occurs, the external circuit can set DISABLE / RESET
low (L) to shut down the gate drivers.
PW-84075 I/O AND OPERATION
PW-84075P6 modules can be added to a motor drive to provide
current monitoring and overcurrent protection capability. The fol-
lowing section describes the PW-84075P6 module and its features.
VDD, VDD-RTN
VDD and VDD-RTN supplies input power to the current amplifier.
VIRSENSE (OUTPUT)
VIRSENSE is an output that provides a voltage proportional to the
current passing through RSENSE. The voltage is scaled by a ref-
erence voltage VREF and is equal to VREF/2 to represent zero
current. A voltage greater than VIREF/2 indicates a positive cur-
rent flow (positive voltage from RSENSE + to RSENSE -) through
RSENSE. See FIGURE 1B.
This VIRSENSE voltage is scaled by the input voltage at VIREF, where:
VIRSENSE = (VIREF/2) + (VIREF/168) * (IRSENSE)
Note: IRSENSE is current flowing through RSENSE. Zero amps in
RSENSE is indicated when VIRSENSE = VIREF/2. A voltage greater
(less) than VIREF/2 indicates a positive (negative) current flow
through RSENSE with a value defined by the VIRSENSE equation.
VIRSENSE is electrically isolated from the output stage. A positive
(negative) current flow from RSENSE + to RSENSE - produces a
positive (negative) voltage measurement (See FIGURE 1B).
When the power supply is shut down (SLEEP_MODE input
high), the voltage at VIRSENSE will indicate 0V.
Note: During normal operation 0 Volts at VIRSENSE represents
maximum negative current.
VIREF (INPUT)
A precision voltage reference from an external source is con-
nected to the VIREF pin to set the output voltage scale for
VIRSENSE and VIRSENSE_ABS. Note: The accuracy of the VIRSENSE
and VIRSENSE_ABS outputs are subject to the accuracy and tem-
perature coefficient of VIREF. These must be taken into account
in calculating the overall accuracy of VIRSENSE.
RSENSE+, RSENSE- (INPUTS)
The RSENSE+ and RSENSE- pins are connected to an internal
shunt resistor and monitoring circuitry. These pins can be con-
nected anywhere within the isolation restrictions on the pins
(600V to power pins, 2500V to logic pins). These pins are typi-
cally connected in series with the OUTPUT, VBUS+ or VBUS-, to
measure motor drive current.
VIRSENSE_ABS (OUTPUT)
VIRSENSE_ABS output voltage is the absolute value of the
VIRSENSE voltage signal. VIRSENSE_ABS is zero volts when there
is no current flowing through the RSENSE resistor. It will increase
towards the value of VIREF as the current in RSENSE approaches
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