1 digital grounds, 2 gate drivers, 3 motor current feedback – Rockwell Automation SA3100 Power Module Interface (PMI) Regulator User Manual
Page 29
PMI Regulator Motherboard
2-13
2.2.3.1 Digital Grounds
2.2.3.2 Gate Drivers
The power technology circuit provides the gate firing signals to control the six IGBTs
in the Power Module. Gate firing is controlled by two complimentary signals (e.g.,
U_POS+ and U_POS–), which are the inverse of each other. The positive and
negative sets of signals fire the gates for the upper and lower IGBTs, respectively.
If any drive faults are detected (register 202/1202), the gate signals are turned off. The
+5V gate power is switched so that if the power technology circuit malfunctions or the
watchdog times out, the power to the gates is removed. Gate power is also removed
0.5 seconds after the RPI signal on the Resolver & Drive I/O board is removed.
2.2.3.3 Motor Current Feedback
Motor current feedback is used for the following purposes:
•
Torque loop feedback
•
Id and Iq current minor loops
•
IET fault input
•
Current limit detection
Pin 1:
DGND
Pin 2:
DGND
Pin 3:
DGND
Pin 4:
DGND
Pin 24:
DGND
Pin 47:
DGND
Pin 48:
DGND
Pin 5:
U_POS+
Phase U positive gate firing signal
Pin 6:
U_NEG+
Phase U negative gate firing signal
Pin 7:
V_POS+
Phase V positive gate firing signal
Pin 8:
V_NEG+
Phase V negative gate firing signal
Pin 9:
W_POS+
Phase W positive gate firing signal
Pin 10:
W_NEG+
Phase W negative gate firing signal
Pin 11:
U_POS–
Phase U inverse positive gate firing signal
Pin 12:
U_NEG–
Phase U inverse negative gate firing signal
Pin 13:
V_POS–
Phase V inverse positive gate firing signal
Pin 14:
V_NEG–
Phase V inverse negative gate firing signal
Pin 15:
W_POS–
Phase W inverse positive gate firing signal
Pin 16:
W_NEG–
Phase W inverse negative gate firing signal
Pin 17:
U_AMPS+
AC output current - Phase U
Pin 18:
U_AMPS–
AC output current - Phase U Common
Pin 19:
W_AMPS+
AC output current - Phase W
Pin 20:
W_AMPS–
AC output current - Phase W Common