Project at a Glance

1. Supply-Chain Context

According to the supplied project information,  Velinda supports this vehicle program as a Tier-2 ferrite-core supplier. The cores are supplied to transformer and power-electronics manufacturers, including Delta Electronics, AcBel Polytech and Click Technology, before integration into power assemblies for Model 3 and Model Y vehicle platforms.

The described supply chain requires original Velinda powder-sintered ferrite cores and does not permit unapproved substitution with other material brands.

2. Material and Core Specification

· Core model: PQ50/50.

· Material system: high-frequency, low-loss MnZn soft ferrite.

· Target switching range: 130 kHz to 250 kHz.

· Power-stage architecture: silicon-carbide (SiC) switching solution.

· Quality-system requirement: automotive-grade production controls aligned with IATF 16949 requirements.

3. Operating Conditions and Magnetic Integration

The transformer core is designed for continuous operation across a wide automotive temperature range from -40°C to 135°C. This places demanding requirements on core-loss stability, dimensional consistency and thermal performance.

· Wide-temperature under-hood operating environment.

· Center-leg air gap used to establish the required magnetic characteristics.

· Leakage inductance is intentionally utilized as part of the resonant inductance.

· Integrated magnetics help reduce component count and overall charger volume.

· The PQ geometry provides a compact magnetic path and a winding window suitable for high-power-density transformer construction.

4. Key Performance Targets

5. Why PQ50/50 MnZn Ferrite Is Suitable for This OBC Platform

· Low-loss MnZn ferrite supports efficient high-frequency power conversion in the LLC stage.

· PQ geometry supports a favorable relationship between core cross-section, winding area and compact assembly.

· Controlled air-gap processing enables repeatable magnetic performance and resonant design integration.

· Wide-temperature stability is essential for automotive under-hood reliability.

· Consistent material and dimensional control help reduce thermal and efficiency variation across production batches.

6. Manufacturing and Quality-Control Considerations

Automotive ferrite cores require controlled forming, sintering, grinding, cleaning, sorting, inspection and packaging. For a gapped PQ core, the grinding process and dimensional inspection are especially important because the air gap directly affects inductance, leakage inductance and resonant behavior.

· Controlled powder preparation and sintering for stable magnetic properties.

· Precision center-leg grinding for repeatable air-gap dimensions.

· Visual and dimensional inspection before packaging.

· Batch traceability and automotive-grade quality documentation.

· Protective packaging to reduce chipping and damage during transport.

7. Mandatory Supply Requirement

8. Velinda Technology Project Support

Velinda Technology supports professional buyers with verified ferrite-core sourcing, material documentation, sample coordination and project-based supply communication. For OBC, transformer and power-electronics inquiries, customers may submit drawings, part numbers, material requirements, operating frequency, temperature range, air-gap specifications and annual demand for review.

Website Upload Information

Recommended H1: PQ50/50 MnZn Ferrite Core for a 6.6 kW EV OBC LLC Resonant Transformer

SEO Title: PQ50/50 MnZn Ferrite Core for 6.6 kW EV OBC LLC Transformer | Velinda Technology

Meta Description: Explore a PQ50/50 high-frequency low-loss MnZn ferrite core case for a 6.6 kW EV on-board charger LLC resonant transformer operating at 130-250 kHz in a -40°C to 135°C environment.

URL Slug: /cases/pq50-50-mnzn-ferrite-core-6-6kw-ev-obc-llc-transformer

Primary Keyword: PQ50/50 MnZn ferrite core

Secondary Keywords: EV OBC ferrite core; LLC resonant transformer core; 6.6 kW on-board charger transformer; automotive ferrite core; SiC OBC magnetic core

Case Category: EV Charging / Automotive Power Electronics / Transformer Ferrite Cores

Featured Image Alt Text: PQ50/50 MnZn ferrite core application case for a 6.6 kW EV on-board charger LLC resonant transformer

Image Caption: PQ50/50 high-frequency low-loss MnZn ferrite core for an automotive 6.6 kW LLC resonant OBC transformer platform.

Recommended Excerpt

A mass-production PQ50/50 MnZn ferrite core application for the main LLC resonant transformer in a 6.6 kW EV on-board charger, designed for 130-250 kHz SiC operation, -40°C to 135°C temperatures and integrated resonant magnetics.

Pre-Publication Verification Note

Before publishing, confirm that the use of customer names, vehicle-platform names, supply-chain status, performance data and IATF 16949 references is authorized and supported by current documentation. Where authorization is unavailable, replace named-company references with neutral wording such as “a global EV manufacturer” and “qualified Tier-1 transformer suppliers.”