The SKHI22AH4 is a driver board manufactured by Semikron, designed to control IGBT modules in various power electronic applications. It is a crucial component for ensuring the reliable and efficient operation of high-power inverters and converters.

Applications

• Industrial motor drives
• Uninterruptible power supplies (UPS)
• Welding equipment
• Renewable energy systems (wind turbines, solar inverters)
• Traction applications (electric vehicles, trains)

Features

• Drive and protection functions for IGBT modules
• Short-circuit protection
• Under-voltage lockout
• Over-current protection
• Fibre optic interface for control signals
• Desaturation detection
• Supply voltage monitoring
• Adjustable dead-time
• Error indication output

Benefits

• Enhanced system reliability due to built-in protection features
• Improved efficiency through optimized IGBT control
• Simplified system design with integrated driver functions
• Reduced downtime due to fault diagnostics
• Safe operation with galvanic isolation provided by the fibre optic interface
• Precise control of switching behavior

Additional Details

The SKHI22AH4 typically requires a DC power supply for its operation. The input control signals are usually transmitted via a fibre optic link to provide galvanic isolation between the control circuitry and the high-power section. The board monitors several parameters of the IGBT module, such as collector-emitter voltage, gate voltage, and current, and takes appropriate action in case of a fault condition. It is designed to be compatible with a range of Semikron IGBT modules. The specific voltage and current ratings depend on the IGBT module being driven.

The driver board includes built-in protection mechanisms such as short-circuit protection which shuts down the IGBT in case of a rapid current rise. Under-voltage lockout prevents the IGBT from switching when the supply voltage is too low, ensuring reliable gate drive. Desaturation detection monitors the collector-emitter voltage of the IGBT to detect overcurrent or short-circuit conditions. Adjustable dead-time prevents shoot-through, which can occur if both IGBTs in a half-bridge configuration are switched on simultaneously.