Inverter Design Rationale and Specification

Specifications

• Input – 12-120V DC using IGBTs that can handle that
• Output - 12-480V AC
• Plug-in transformer modules allow from 1 to 10 amplitude modification
• Use turnkey, plug-in IGBT module of 2.5 kW continuous, 5 kW peak
  • Proper heat sinking
• Use turnkey, plug-in gate driver
• Use pure sine wave signal generator
• Stackable up to 10 units for up to 25kW
  • Phase cable connects units so power is in phase

Particulars

• Continuous output power: 2500 Watts
• Surge power capability (peak power): 5000 Watts
• dc input / operating voltage: 10 to 120 DC
• Output voltage: 120-480 Volts ac
• Output frequency: 60 Hz +/- 0.5 Hz
• Battery low voltage shutdown: 9.5 +/- 0.5 V
• No load minimum operating temperature: 25 degrees F
• Full load maximum operating temperature: 140 degrees F
• Efficiency: >90%
• No load draw: .6 amps
• AC Output Socket Type: 3 bolt down connectors
• High input voltage protection: 15V
• Low input voltage shutdown: 10V
• Internal fuse protection

Modularity

• Plug-in transformers

Scalability and Modularity Analysis

• Basic unit above provides up to 25kW continuous power with a stack of 10 inverters
• Plug in IGBT module may be scaled for higher power, up to 250 kW for a stack of 10 inverters.
• Modular design retains allowance for different gate drivers, such as high frequency power for induction furnace power supplies and other applications

Links

IGBT Sources

• http://www.shaoguang.com.cn/data/sgkj09005.pdf

Deployment Strategy

• Ask a vendor for a ready design
• Post on GrabCAD