Hitachi EUB-5500 Technical Manual page 79

FILTER BＯＡＲＤ
LINE INPUT
LINE FILTER
PFC CIRCUIT
CIRCUIT_
MAIN CONVERTER
BREAKER
CIRCUIT(DC)
PFC CIRCUIT
CONVERTER
CIRCUIT(AC)
TRANS
Analog HV Unit
Analog LV Unit
AC OUTPUT
MAIN CONVERTOR DC BOARD
HM－ － － － 071C HM HM HM 071C 071C 071C
MAIN CONVERTOR AC BOARD
MAIN
US-UNIT US-UNIT
US-UNIT US-UNIT
US-UNIT US-UNIT US-UNIT US-UNIT
Fig5.1 Fig5.1 Fig5.1 POWER UNIT Block Diagram Fig5.1 POWER UNIT Block Diagram POWER UNIT Block Diagram POWER UNIT Block Diagram
HM HM HM－ － － － 071K HM 071K 071K 071K
FILTER
CHOPPER
CIRCUIT
OVER
CURRENT
PROTECTION
CIRCUIT
OVER VOLTAGE
PROTECTION
CIRCUIT
DC OUTPUT
Analog HV Unit /
Analog LV Unit
RECTIFICATION
AND
SMOOTHING
CIRCUIT
REGULATOR
CIRCUIT
OVER
CURRENT
PROTECTION
CIRCUIT
OVER VOLTAGE
PROTECTION
CIRCUIT
DC OUTPUT