PQ magnetic cores are made of magnetic materials such as ferrite, silicon steel sheets, soft magnetic powder alloys, or nanocrystalline strips. They have a typical structure of a "flat bottomed square base with a central column and a peripheral magnetic yoke", and are symmetrically closed as a whole. They are often assembled together to form a complete closed magnetic circuit and are suitable for power or inductor designs that require high magnetic integration and compact layout. During the production process, differentiated processes are adopted based on material characteristics: ferrite PQ magnetic cores are mixed with ingredients, molded into molds, and then sintered at high temperatures; The PQ magnetic core of silicon steel sheet is precision stamped into the corresponding shape and then laminated and fastened; The PQ magnetic core made of soft magnetic powder alloy is solidified by low-temperature heat treatment after being pressed by magnetic powder. Some products will have a uniform air gap set at the center column or yoke to optimize inductance stability and DC bias capability.

The design of PQ structure combines the characteristics of short magnetic circuit and low magnetic leakage, which can significantly improve energy conversion efficiency; The enclosed magnetic yoke can effectively shield electromagnetic interference and is suitable for scenarios such as high-frequency switching power supplies that require high electromagnetic compatibility; The flat bottom structure is easy to install and fix, and the proportion design of the central column and the peripheral magnetic yoke can flexibly adjust the winding space and magnetic performance to meet the application requirements of different power levels.

The PQ magnetic cores produced by Wanli New Materials cover a variety of material types: PQF - ferrite PQ magnetic cores, PQSS - silicon steel sheet PQ magnetic cores, PQPM - soft magnetic powder alloy PQ magnetic cores, PQNC - nanocrystalline PQ magnetic cores. The following describes the size and magnetic permeability range of each material, as well as the characteristics and applications of these materials.