Oskari Leppäaho

Title: Oskari Leppäaho: Innovator in Voltage Balancing Circuits

Introduction

Oskari Leppäaho is a notable inventor based in Krusaa, Denmark. He has made significant contributions to the field of electrical engineering, particularly in the development of voltage balancing circuits. His innovative work has led to the creation of a patent that addresses critical challenges in capacitor banks and variable frequency drives.

Latest Patents

Oskari Leppäaho holds a patent for a "Voltage balancing circuit for series connected capacitor banks or voltage cells and variable frequency drive for driving an electric motor or power converter for supplying a load with a voltage balancing circuit." This invention focuses on a voltage balancing circuit designed for capacitor banks or voltage cells connected in series. The circuit features a DC-link with at least two capacitors or voltage cells connected in series, along with at least two emitter follower balancing circuits connected in parallel. Each emitter follower balancing circuit includes an emitter resistor positioned between its emitter and the mid-point of the DC-link. The gate emitter voltage applied to each circuit may be adjusted based on the common gate voltage minus the voltage drop across the corresponding emitter resistor. This invention also encompasses a variable frequency drive for electric motors or power converters that incorporates the voltage balancing circuit.

Career Highlights

Oskari Leppäaho is currently employed at Danfoss Power Electronics A/S, where he continues to innovate and contribute to advancements in power electronics. His work at Danfoss has allowed him to apply his expertise in developing solutions that enhance the efficiency and reliability of electrical systems.

Collaborations

Oskari collaborates with Orges Gjini, a fellow innovator at Danfoss Power Electronics A/S. Their partnership fosters a creative environment that encourages the development of cutting-edge technologies in the field of power electronics.

Conclusion

Oskari Leppäaho's contributions to voltage balancing circuits and his work at Danfoss Power Electronics A/S highlight his role as a significant innovator in electrical engineering. His patent reflects a commitment to advancing technology and improving the performance of electrical systems.