Pulsating quantity is a term in the field of electrical engineering, referring to a physical quantity with periodic fluctuation characteristics. This term was officially announced as an electrical engineering term in 1998 and was included in the first edition of “Electrical Engineering Terms” [1]. It was also classified as a term in the category of air conditioning, heating, ventilation, and refrigeration technology in the “Newly Compiled English-Chinese Dictionary of Air Conditioning, Heating, Ventilation, and Refrigeration Technology” [3].
Pulsating quantity is commonly found in the field of power electronic circuits, such as in the Cuk buck converter circuit, where it is used to describe the fluctuation characteristics of the input and output currents. The topology of this circuit consists of a Boost converter and a Buck converter connected in series. By adjusting the inductor parameters, the amplitude of current pulsation can be effectively reduced. The output voltage of this circuit has an opposite characteristic to the input voltage, and it has a wide range of voltage regulation capability.