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
![](https://www.amosplanet.org/wp-content/uploads/2022/05/16536624171.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/07/企业微信截图_16571788471469.png)
![](https://www.amosplanet.org/wp-content/uploads/2023/05/image-1-1024x246.png)
SPH 4-10K tL3 BH UP System Principle Diagram
![](https://www.amosplanet.org/wp-content/uploads/2022/05/16536625211.png)
Board type
Mainboard
![](https://www.amosplanet.org/wp-content/uploads/2022/05/b4dec9edc1ef99df9a08d4b934f7c27.png)
Control board
![](https://www.amosplanet.org/wp-content/uploads/2022/05/a0c7a43555f1431b51c9b542ad1d7e1.png)
M3 Board
![](https://www.amosplanet.org/wp-content/uploads/2022/05/1653660308.png)
Capacitor Board
![](https://www.amosplanet.org/wp-content/uploads/2022/05/16536604681.png)
UPS Board
![](https://www.amosplanet.org/wp-content/uploads/2022/05/16536608751.png)
MOV Board
![](https://www.amosplanet.org/wp-content/uploads/2022/05/16536610031.png)
Mainboard Circuit Analysis
- Anti reverse Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/05/image-38-767x1024.png)
- PV Boost Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/05/16539206351.png)
- INV Circuit
![](https://www.amosplanet.org/wp-content/uploads/2022/05/16539212321.png)
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
![](https://www.amosplanet.org/wp-content/uploads/2022/05/02bb2e895cfd3d953b3f8cc13a99365.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/05/b2df96899583ef2dae3738998025b10-1024x767.jpg)
- Driving Circuit of PV BOOST and T-type 3 level
![](https://www.amosplanet.org/wp-content/uploads/2022/05/16539221391.png)
- 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
![](https://www.amosplanet.org/wp-content/uploads/2022/05/16539231761-767x1024.png)
DC SPS Circuit principle: DC SPS uses bus voltage to supply power for main SPS circuit
Main SPS Circuit principle:
![](https://www.amosplanet.org/wp-content/uploads/2022/05/企业微信截图_16539235743567.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/05/image-39-767x1024.png)
LCD power supply
![](https://www.amosplanet.org/wp-content/uploads/2022/05/企业微信截图_16539251722468.png)
![](https://www.amosplanet.org/wp-content/uploads/2022/05/2aa99a07-4a34-4d30-bd8c-a1c45b3e8448-1024x767.jpg)