Yaskawa G7 3-Level Inverter Motor Bearing Current Application Note

This application note examines the common-mode voltage in inverter-driven AC motors and compares its effects in 2-level versus 3-level inverters, specifically regarding motor shaft voltages and bearing currents. It presents test results demonstrating that Yaskawa's G7 3-level inverter technology significantly reduces bearing damage compared to conventional 2-level inverters.