Uno Lamm: The Father of HVdc Transmission [History]

In the early 1920s, August Uno Lamm had a vision that would ultimately take decades to come to fruition and change the world forever. Lamm, who is widely referred to as the father of high-voltage (HV) dc transmission, invented the first economical way to convert ac to dc and then back again. His discovery and development of the HV mercury-arc ionic valve paved the way for efficient and practical HV transmission.