SPH 4-10K tL3 BH UP introduction
Model definition
BH means Battery High voltage
TL3 means 3 phase
UP means new version
SPH 4-10K tL3 BH UP Appearance
SPH 4-10K tL3 BH UP System Principle Diagram
Board type
Mainboard
Control board
M3 Board
Capacitor Board
UPS Board
MOV Board
Mainboard Circuit Analysis
- Anti reverse Circuit
- PV Boost Circuit
- INV Circuit
Every group of T-type three-level contains 4 IGBT, the principle is BUCK-BOOST Circuit, 3 groups in total
- BUCK-BOOST Circuit
Function: The circuit is used to convert battery voltage into bus voltage. The circuit contains 4 IGBT, like T-type 3 level
- Driving Circuit of PV BOOST and T-type 3 level
- SPS Circuit
AC or DC source can supply power for the inverter seperately
AC SPS Circuit principle: AC voltage is converted into BUS voltage ( almost 500V) via AC SPS circuit on UPS board, the voltage should be greater than battery voltage. Then go into main SPS circuit
DC SPS Circuit principle: DC SPS uses bus voltage to supply power for main SPS circuit
Main SPS Circuit principle:
LCD power supply
