EMC (Electromagnetic Compatibility) testing for an Active Harmonic Filter AHF is critical and non-negotiable. An AHF(APF) is a power electronics device (like a high-frequency inverter) that injects canceling currents into a noisy electrical system. If poorly designed, it can become a significant source of electromagnetic interference (EMI) itself, disrupting other equipment. Conversely, it mu...
The Problem: Variable Speed Drives Generate Harmonics What is a Variable Speed Drive (VSD/VFD)?A Variable Speed Drive (VSD), also commonly called a Variable Frequency Drive (VFD) or Adjustable Speed Drive (ASD), is an electronic device that controls the speed and torque of an AC electric motor by varying the motor's input frequency and voltage. How Do They Cause Harmonics?The internal design of a ...
Introduction As global energy demand continues to rise, distributed photovoltaic (PV) generation has emerged as a key solution for achieving sustainable and decentralized power. In Latin America, Colombia has been steadily expanding its renewable energy capacity, with the city of Medellín—a vibrant urban hub surrounded by the Andes Mountains—leading the way in solar adoption. Th...
The Role of Energy Storage Systems in Off-Grid Power Systems As the need for reliable and sustainable electricity increases worldwide, off-grid power systems are becoming vital. They are important for remote areas, islands, industrial sites, and places with limited access to the grid. Off-grid systems let communities and businesses work without support from national grids. This reduces the ne...
Active Harmonic Filters (AHF): A Simple Guide to Cleaner Electricity Electricity is part of our daily life. It powers factories, schools, hospitals, shopping centers, and homes. Today, many devices such as computers, chargers, elevators, solar systems, and electric vehicles use advanced electronics. While these devices are useful, they can also make electricity “messy” and harder to co...
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