At high frequencies, the NBT transformer will deliver no load to the power lines. When the control winding is used to deliver energy to an extra secondary load, more efficient use of copper is ...

The iW1700 zero-power ac/dc digital PWM controller enables low-cost, energy-efficient 120/230V-ac offline adapters and chargers requiring as much as 5W, which consume zero no-load power for cell ...

Hitachi Energy has supplied two 110 kilovolt, 63 megavolt ampere EconiQ™ power transformers to China's largest grid operator the State Grid Corporation of China (SGCC) for a visionary substation ...