How does the PQ series high-frequency transformer empower efficient power supply design with its compact structure and low-loss characteristics?
Publish Time: 2026-04-27
In the wave of miniaturization and high efficiency evolution of electronic devices, the high-frequency transformer, as a core component of switching power supplies, directly determines the power density and conversion efficiency of the power supply. The PQ series high-frequency transformer, with its unique magnetic core structure and vertical mounting design, stands out in high-end fields such as server power supplies, new energy vehicles, and photovoltaic inverters. With its core advantages of "small size, high power, and low loss," it solves the bottlenecks of traditional magnetic cores in terms of space utilization and heat dissipation performance, becoming an indispensable key component in modern high-efficiency power supply design.The compact structure and vertical mounting method of the PQ magnetic core achieve a dual breakthrough in power density and space utilization. The name PQ magnetic core comes from its shape; this near-pancake design optimizes the ratio of magnetic circuit cross-sectional area to winding window. Compared with traditional magnetic cores such as E-type and ETD-type, it can accommodate more winding turns in the same volume while reducing leakage flux. The vertical mounting method further reduces the transformer's footprint on the PCB board, making it suitable for space-sensitive scenarios such as data center server power supplies. In the OBC (On-Board Circuit) module of new energy vehicles, the PQ series transformers, through vertical layout, increase power density several times that of traditional designs. This saves valuable installation space within the vehicle and provides ample room for peripheral components such as the battery management system, achieving the design goal of "small size, big energy."The synergistic design of low-loss magnetic materials and flat wire windings lays the foundation for efficient conversion and low-temperature operation. The losses in high-frequency transformers mainly originate from iron losses in the magnetic core and copper losses in the windings. The PQ series, through its independently developed wide-frequency, wide-temperature, low-loss magnetic materials, significantly reduces hysteresis and eddy current losses at high frequencies. Combined with flat wire winding technology, using rectangular cross-section copper wire instead of traditional round wire not only increases the conductor cross-sectional area to reduce DC resistance but also reduces the skin effect and proximity effect at high frequencies through close arrangement, resulting in a more uniform current distribution. In the MPPT (Multi-Level Transformer) boost circuit of photovoltaic inverters, this combination of "low-loss magnetic materials + flat wires" allows the overall transformer conversion efficiency to break through bottlenecks, keeping temperature rise within a safe range. Even under prolonged full-load operation, it maintains stable performance output, effectively extending the lifespan of the power system.The enclosed magnetic circuit and excellent heat dissipation performance ensure reliability and electromagnetic compatibility in complex environments. The PQ core employs a closed-structure design, with magnetic flux primarily circulating within the core, significantly reducing electromagnetic interference from leakage flux to surrounding circuits and lowering EMI filtering costs for the power supply system. The vertical mounting method directly exposes the transformer's heat dissipation surface to the airflow channel, allowing for rapid heat transfer from the windings and core to the external environment using thermally conductive adhesive or heat sinks. In industrial control power supplies, this design enables the PQ series transformers to operate stably under harsh conditions of high temperature, high humidity, and strong electromagnetic interference. Their vibration and shock resistance are also enhanced through automated winding processes, avoiding reliability issues caused by turns deviations or poor welding in traditional windings, meeting the stringent requirements of automotive and industrial applications.From compact structure to high efficiency and low loss, from electromagnetic compatibility to environmental adaptability, the PQ series high-frequency transformer, with technological innovation at its core, deeply integrates core design, winding technology, and mounting methods. While improving power supply efficiency, it provides crucial support for the miniaturization and lightweighting of electronic equipment. It is not only an "energy transfer station" in the power system, but also a core driving force for technological upgrades in fields such as new energy, communications, and industrial control. In the process of increasing efficiency in the modern electronics industry, it continues to write a technological chapter of "precise voltage transformation and efficient power empowerment".
