Inverter System Control - Mitsubishi Electric MSC-GE-VB Service Manual

2-8. INVERTER SYSTEM CONTROL

2-8-1. Inverter main power supply circuit
MUZ-GC, HC, FD25/35, GE25/35/42/50
NOISE
POWER
FILTER
SUPPLY
CIRCUIT
Function of main parts
NAME
INTELLIGENT POWER MODULE
SMOOTHING CAPACITOR
CURRENT TRANSFORMER
DIODE MODULE 1
RESISTOR
RELAY
DIODE MODULE 2
BOOSTER
CHOPPER SWITCHING POWER TRANSISTOR
CIRCUIT
REACTOR
MUZ- EF
RELAY1 RESISTOR
POWER RELAY2
SUPPLY
Function of main parts
NAME
INTELLIGENT POWER MODULE
SMOOTHING CAPACITOR
DIODE MODULE 1
RESISTOR
RELAY1
RELAY2
BOOSTER
POWER FACTOR CORRECTION MODULE It improves power factor.
CHOPPER
REACTOR
CIRCUIT
DIODE
REACTOR
MODULE1
RESISTOR
~
RELAY
+
~
DIODE
-
MODULE2
BOOSTER CHOPPER CIRCUIT
DIODE
REACTOR
MODULE1
NOISE
~
FILTER
CIRCUIT
POWER
FACTOR
CORRECTION
MODULE
BOOSTER CHOPPER CIRCUIT
P
+
+
~
SMOOTHING
CAPACITOR
-
N
INTELLIGENT
POWER
MODULE
~
SWITCHING
POWER
TRANSISTOR
It supplies 3-phase AC power to compressor.
It stabilizes the DC voltage and supply it to INTELLIGENT POWER MOD-
ULE.
It measures the current of the compressor motor.
It converts the AC voltage to DC voltage.
It absorbs the rush current not to run into the main power supply circuit
when the power is turned ON.
It keeps the RESISTOR, which restricts rush current, short-circuit while
the compressor is operating.
It improves power factor.
It controls the bus-bar voltage.
P
+
+
~
SMOOTHING
CAPACITOR
-
N
INTELLIGENT
POWER
MODULE
It supplies 3-phase AC power to compressor.
It stabilizes the DC voltage and supply it to INTELLIGENT POWER MOD-
ULE.
It converts the AC voltage to DC voltage.
It absorbs the rush current not to run into the main power supply circuit
when the power is turned ON.
It passes the rush current to RESISTOR when the power is turned ON.
It keeps the RESISTOR, which restricts rush current, short-circuit while
the compressor is operating.
It controls the bus-bar voltage.
17
CURRENT
TRANSFORMER
U
U
MS
V
3~
V
W
W
COMPRESSOR
FUNCTION
U
U
MS
V
3~
V
W
W
COMPRESSOR
FUNCTION