The high prices of energy are leading to renewed interest in the more efficient motors driven by Variable Frequency Drives or VFDs. Many types of motors such as brushless DC motors, switched ...

A novel approach to power factor correction in switching power supplies that works by controlling both on and off time of the switcher, based on inductor current. Fig 1.The disadvantage of the CCM ...

An international research team has tested a hybrid control technique combining adapted perturb and observe (APO) with model-predictive control to address complex partial shading in solar arrays. The ...

Electronic ballasts for fluorescent lighting deliver high efficiency and long lamp lifetimes. A new and simplified control circuit demonstrates complete control of the ballast, including all necessary ...

Among all power factor correction (PFC) topologies, totem-pole bridgeless PFC provides the best efficiency; therefore, it is widely used in servers and data centers. However, closing the current ...