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Real-time adjustable gate current control IC solves dv/dt problems in electric drives

The tuning of commutation speed of currents between freewheeling diodes and IGBT plays an important role in respect of the EMI behavior of power electronics. High dv/dt means a large stress for the motor winding insulation and motor bearings as well as it causes conducted and radiated interferences with the supply in general. Many works for speed control of IGBT turn-on are known and solutions result in large and complex control units. This paper presents the benefits of a novel gate drive IC, which offers an online adjustment feature for collector emitter voltage transient dvc/dt in respect of the switching waveforms. The paper also shows, that the IC allows targeting new design tradeoffs in the application.

• 869.04 KB
• 31/05/2014