Mxz Microprocessor Control; Inverter System Control - Mitsubishi Electric MSC-GE-VB Service Manual

3

MXZ MICROPROCESSOR CONTROL

3-1. INVERTER SYSTEM CONTROL

3-1-1. Inverter main power supply circuit
MXZ-2B30VA MXZ-2B40VA MXZ-2B52VA
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
MXZ-3B54VA MXZ-3B68VA MXZ-4B71VA MXZ-4B80VA MXZ-5B100VA
MXZ-3C54VA MXZ-3C68VA MXZ-4C71VA MXZ-4C80VA MXZ-5C100VA
NOISE
POWER
FILTER
SUPPLY
CIRCUIT
Function of main parts
NAME
INTELLIGENT POWER MODULE
SMOOTHING CAPACITOR
CURRENT TRANSFORMER
REACTOR
POWER FACTOR CORRECTION MODULE
RESISTOR
RELAY
DIODE
REACTOR
MODULE1
RESISTOR
RELAY
+
~
DIODE
-
MODULE2
BOOSTER CHOPPER CIRCUIT
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 the
power is turned ON.
It keeps the RESISTOR, which restricts rush current, short-circuited while
the compressor is operating
It improves power factor.
It controls the bus-bar voltage.
REACTOR
POWER
RESISTOR
FACTOR
CORRE-
CTION
MODULE
RELAY
It supplies 3-phase AC power to compressor.
It stabilizes the DC voltage and supplies it to INTELLIGENT POWER MOD-
ULE.
It measures the current of the compressor motor.
It rectifi es AC, controls its voltage and improves the power factor of power
supply.
It absorbs the rush current not to run into the main power supply circuit the
power is turned ON.
It keeps the RESISTOR, which restricts rush current, short-circuited while
the compressor is operating.
+
+
~ ~
SMOOTHING
CAPACITOR
-
~
SWITCHING
POWER
TRANSISTOR
FUNCTION
+
SMOOTHING
CAPACITOR
FUNCTION
24
CURRENT
TRANSFORMER
U
U
P
MS
V
3~
V
N
W
W
INTELLIGENT
COMPRESSOR
POWER MODULE
CURRENT
TRANSFORMER
U
U
P
MS
V
3~
V
N
W
W
INTELLIGENT
COMPRESSOR
POWER
MODULE