Siemens provides a recommended PCB layout and thermal management guide in their application note AN2015-03. It's essential to follow these guidelines to ensure proper heat dissipation and minimize thermal resistance.
Siemens recommends using a gate driver with a minimum output current of 2A and a voltage rating that matches the IGBT's gate-emitter voltage. The driver should also have a propagation delay of less than 100ns to ensure proper switching.
Siemens recommends maintaining a voltage imbalance of less than 10% between the DC-link capacitors to ensure proper operation and prevent damage to the IGBTs.
Siemens recommends using a fast-acting fuse or an electronic overcurrent protection circuit that can detect and respond to overcurrent conditions within 10μs. The protection circuit should be designed to disconnect the IGBT from the DC-link within 20μs.
Siemens recommends using a desaturation detection method that monitors the IGBT's collector-emitter voltage and turns off the gate signal within 1μs of detecting desaturation. This helps prevent damage to the IGBT and ensures reliable operation.
