Inverter System Control - Mitsubishi Electric MSC-GE-VB – E Service Technical Manual

2-8. INVERTER SYSTEM CONTROL

2-8-1. Inverter main power supply circuit
MUZ-GC, HC, FD25/35, GE
NOISE
POWER
FILTER
SUPPLY
CIRCUIT
Function of main parts
NAME
INTELLIGENT POWER MODULE (IPM)
SMOOTHING CAPACITOR
CURRENT TRANSFORMER
DIODE MODULE 1
RESISTOR
RELAY
DIODE MODULE 2
BOOSTER
CHOPPER SWITCHING POWER TRANSISTOR
CIRCUIT
REACTOR
MUZ-FD50
NOISE
POWER
FILTER
SUPPLY
CIRCUIT
Function of main parts
NAME
INTELLIGENT POWER MODULE (IPM)
SMOOTHING CAPACITOR
CURRENT TRANSFORMER
REACTOR
POWER FACTOR CORRECTION MODULE (PFC)
RESISTOR
RELAY
DIODE
REACTOR
MODULE1
RESISTOR
~
RELAY
+
~
DIODE
-
MODULE2
BOOSTER CHOPPER CIRCUIT
REACTOR
RESISTOR
RELAY
It supplies 3-phase AC power to compressor.
It stabilizes the DC voltage and supplies it to IPM.
It measures the current of the compressor motor.
It measures the current of the main power supply circuit.
It rectifi es AC, controls its voltage and improves the power factor of power
supply.
It restricts rush current with the resistance.
It short-circuits the resistance which restricts rush current during the compres-
sor operates.
+
+
~
SMOOTHING
CAPACITOR
-
~
SWITCHING
POWER
TRANSISTOR
It supplies three-phase AC power to compressor.
It stabilizes the DC voltage and supply it to IPM.
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 electricity turns ON.
It short-circuits the resistance which restricts rush current during the nor-
mal operation after the compressor startup.
It improves power factor.
It controls the bus-bar voltage.
+
SMOOTHING
PFC
CAPACITOR
17
CURRENT
TRANSFORMER
U
U
P
MS
V
3~
V
N W
W
IPM COMPRESSOR
FUNCTION
CURRENT
TRANSFORMER
U
U
P
MS
V
3~
V
N W
W
IPM
COMPRESSOR
FUNCTION