ProMagTech manufactures custom flat wire inductors, planar transformers, PFC inductors and EMI filter magnetics for EV chargers, energy storage PCS, solar inverters and industrial power converters.
Engineering pages for buyers comparing flat wire inductors, PFC inductors, integrated magnetics and high-current sample-stage design cases.
Review saturation margin, DCR, core loss, thermal structure and validation checkpoints for high-current inductors.
Compare flat wire and round wire winding for DCR, thermal path, saturation behavior and power density.
Selection and calculation notes for charging-station and industrial three-phase PFC inductors.
Review transformer and resonant inductor integration for compact high-frequency power converters.
An anonymized high-current design case covering DC bias, compact envelope and sample-stage checks.
Public evidence for engineers and sourcing teams reviewing ProMagTech's manufacturing process, sample-stage design work and inspection scope.
Open workshop photos, flat wire process images, testing photos, product files and redacted quality records.
Review public OQC fields for inductance, DC bias, leakage inductance, DCR, hi-pot and insulation resistance checks.
Use the anonymized case skeleton for ripple control, magnetic loss, thermal path, insulation and mounting review.
Read the anonymized sample-stage case with DC bias roll-off, compact envelope and validation checkpoints.
Why industry leaders choose ProMagTech
Flat copper wire winding is reviewed against DCR, AC loss, thermal path and DC bias requirements. Final loss and temperature rise must be confirmed by sample test data.
Engineering review starts from converter topology, current waveform, insulation requirements, thermal path and mechanical envelope. Custom design support is documented through project-specific drawings, samples and test records.
Public evidence now includes factory process photos, production equipment photos, finished-product inspection images, product files and redacted inspection records.
Project communication supports overseas buyers in Southeast Asia and other export markets. Published evidence now focuses on process records, inspection scope, product files and engineering review materials.
Custom design review starts from inductance, current waveform, frequency, cooling method and mechanical envelope. Sample timing is confirmed after engineering review.
Inspection scope can cover inductance, DCR, DC bias, leakage inductance, turns ratio, hi-pot and insulation resistance according to the approved sample record.
Zhang Yong
+86 13537658938
zyong@promagtech.cn
No. 22 Dongkeng Road, Fenghuang Street, Guangming District, Shenzhen, China
www.promagtech.com
ProMagTech
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📍 Shenzhen, China
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Full range of high-performance power magnetic components for various power levels and applications
Featuring flat copper wire winding for ultra-low DCR and excellent thermal performance. Designed for EV, energy storage and other high-current applications.
Nanocrystalline core designed for three-phase power systems. Excellent common mode impedance for PV inverters and energy storage converters.
Flat wire winding with nanocrystalline core for ultra-high power density. Suitable for LLC, CLLC resonant topologies up to 200kHz.
Designed for EV motor drive and inverter EMC filtering. for automotive applications.
Designed for EV DC charging station PFC circuits with flat wire winding supporting high power output.
Amorphous core with PCB-mounted winding structure, ultra-thin design for SiC/GaN high-frequency applications.
Designed for single-phase/three-phase PFC circuits with low DCR and low temperature rise.
Designed for energy storage converters and bidirectional DC-DC modules. available.
Ultra-thin SMD flat wire inductor for consumer electronics and compact industrial power modules.
Deep dive into magnetic component design principles, selection guides, and application cases

Comprehensive comparison of two winding technologies from DC resistance, saturation current, thermal performance, and cost.
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Detailed explanation of inductor selection steps, calculation formulas, and design considerations for three-phase PFC circuits.
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Systematic explanation of common mode choke optimization methods from core material selection to winding structure and grounding.
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Key points on insulation distance, partial discharge, and thermal management design for 800V architecture requirements.
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Analysis of magnetic component reliability design strategies for harsh environments including high temperature, humidity, and salt spray.
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Comprehensive analysis of magnetic component technical requirements and selection recommendations for energy storage PCS and PV inverters.
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Review transformer and PFC module design points for outdoor energy storage PCS systems.
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Review the 3kW / 800V LLC transformer frequency-knee trade-off between 400kHz and 1MHz.
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Review magnetic-loss dominated design in the 48V to 12V intermediate-bus DCX transformer stage.
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Compare 11kW totem-pole and 22kW Vienna PFC inductor design boundaries for 800V-platform OBC systems.
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Review EQ flat core design, copper busbar output, thermal path and automated assembly boundaries for 48V AI server PSU flat transformers.
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Map magnetic component positions from 10kV grid input to 800V and 48V conversion stages and CPU/GPU core VRM rails.
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Review high-efficiency, high-reliability, low-loss and customized magnetic component design points for PCS systems.
Download PDFSHENZHEN PROMAGTECH CO.,LTD was founded in 2013, specializing in R&D, manufacturing, and sales of power magnetic components. Located in Guangming District, Shenzhen, we have modern production facilities and comprehensive quality testing systems.
Our main products include flat wire inductors, planar transformers, common mode chokes, PFC boost inductors, energy storage inductors, and high-frequency amorphous reactors. Our core products feature flat copper wire winding technology and nanocrystalline core materials, offering low DCR, high saturation current density, excellent thermal performance, and high reliability.
Products are widely used in EV OBC (On-Board Chargers), DC-DC converters, EV DC charging stations (20kW-60kW), solar inverters, energy storage converters (PCS), industrial power supplies, and 5G communication power supplies. Product evidence, material declarations, and reliability test scope should be confirmed for each project before qualification.
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Covering EV, energy storage, solar, medical devices and more, providing one-stop magnetic component solutions





