A toroidal inductor is a coil wound around a donut-shaped magnetic core, widely used in power supplies, EMI filters, and renewable energy systems. Its symmetrical geometry delivers lower electromagnetic interference (EMI) and higher efficiency compared to solenoid inductors.
How Toroidal Inductors Work
The toroidal shape confines magnetic flux within the core, minimizing stray fields. This self-shielding property makes toroidal inductors ideal for sensitive electronics where EMI must be kept below strict limits.
Key Advantages
- High efficiency with low core loss
- Compact form factor
- Low radiated EMI
- Wide current range from mA to hundreds of amps
Common Applications
Toroidal inductors are found in switch-mode power supplies (SMPS), solar inverters, EV on-board chargers, audio equipment, and LED drivers. Custom designs allow optimization for specific frequency, current, and inductance requirements.
Choosing the Right Core Material
Core selection depends on operating frequency and flux density: ferrite for high-frequency, powdered iron for high-current, and nanocrystalline for low-loss, high-efficiency designs.
Contact SIRUI-Tech for custom toroidal inductor design and manufacturing. We provide free samples and engineering support.
About Shaanxi SiRui Technology Co., Ltd
Shaanxi SiRui Technology Co., Ltd (Sirui-Tech) is a professional magnetic components manufacturer specializing in electrical transformers, power inductors, current sensors and magnetic cores. We offer OEM & ODM services with free samples, fast lead times and 100% pre-shipment inspection. Browse our products or contact us for a quote.