A Transformer Core is the engineered magnetic circuit that guides flux, sets efficiency, and shapes thermal and acoustic behavior in transformers, reactors, and current sensing devices. For OEMs, utilities, EPC teams,and industrial users, core design is where performance targets become measurable outcomes: lower no-load loss, reduced noise, stable temperature rise, and consistent long-term reliability.
SHJISCO provides a practical range of core solutions designed to match real-world operating environments—indoor resin-cast systems, outdoor oil-immersed networks, compact power electronics, and precision metering.
Designed for resin-cast and dry-type systems where compactness, low noise, and safety are critical.
Optimized lamination stacking and joint design help reduce no-load loss, no-load current, and vibration.
Commonly paired with high-grade insulation materials and stable clamping structures for long service life.
Built for high-voltage and high-capacity applications requiring strong overload capability and stable thermal performance.
Core design supports efficient heat transfer in oil and supports robust mechanical stability under energization cycles.
Suitable for grid, industrial substations, and large power conversion systems.
Focused on high efficiency and reliability for voltage step-down in distribution networks.
Supports multiple material choices—from silicon steel laminations to advanced low-loss alloys—based on energy targets and budget.
Built with attention to sealing, insulation coordination, and long-term environmental stability.
Angle or stepped joint design helps reduce flux leakage, noise, and vibration.
Improves electromagnetic compatibility (EMC) by lowering stray magnetic fields and external interference.
Often selected where quiet operation and compact layouts matter.
Continuous wound magnetic path minimizes air gaps and reduces flux leakage.
Ideal for compact inductors, power electronics filters, and precision sensing.
A strong choice when designing a current transformer core for accurate metering and protection.
A transformer is a system, not a single part. The core works with other components to deliver a safe, efficient, and durable electrical machine. Key transformer components include:
Magnetic core (limbs & yokes): the flux path that determines no-load loss, noise, and efficiency.
Windings (HV/LV): copper or aluminum conductors that transfer energy; their layout affects losses and insulation design.
Insulation system: paper/pressboard/oil systems in oil-filled units, or solid insulation and resin systems in dry types.
Clamping & fastening parts: core frames, yoke clamps, and structural parts controlling vibration and short-circuit strength.
Tank & cooling (for oil-filled): oil, radiators, conservator/sealed tank options, and accessories that manage temperature rise.
Terminals & protection: bushings, tap changers (where applicable), monitoring and protection devices.
When these parts are engineered as a complete system, the core can operate at its designed magnetic induction with stable temperature rise—without excessive hum, hot spots, or long-term degradation.
Core performance is largely determined by material selection and structural design. SHJISCO’s design approach focuses on:
Reduced hysteresis and eddy-current losses through appropriate steel selection and insulation coating strategies.
High permeability options to improve flux density management and efficiency under rated conditions.
Advanced joint concepts (e.g., stepped or inclined joints) to improve magnetic circuit closure and reduce leakage.
Stable clamping and optimized joint geometry help reduce magnetostriction-driven vibration.
Design choices can lower acoustic noise while maintaining compact size and thermal performance.
Oil-filled designs: oil provides cooling, dielectric insulation, and helps protect internal insulation from moisture and contaminants.
Dry type designs: insulation class and airflow/heat dissipation paths become central to safe operation.
Unicore: reduced leakage, improved EMC, compact layouts.
Wound core: near-closed magnetic field lines, excellent for precision sensing and compact inductors.
Laminated stacked core: scalable for distribution and power transformers with standardized manufacturing.
