Applications of Bifilar Air-Core Inductors in New Energy Sectors

I. New Energy Vehicles (NEV)

Main Drive Inverters

• Role: Acts as an AC-side output filter inductor.

• Function: Filters high-frequency harmonics from motor drive pulse voltage to generate smooth sine wave currents. This reduces motor loss and noise while suppressing voltage spikes and electromagnetic interference (EMI).

  
  

On-Board Chargers (OBC)

• Role: Serves as a boost inductor in PFC (Power Factor Correction) circuits.

• Function: Stores and releases energy in Critical Conduction Mode (CrM) or Continuous Conduction Mode (CCM) PFC circuits. It aligns the input current phase with the voltage to enhance the power factor.

  
  

DC-DC Converters

• Role: Functions as a filtering or energy-storage inductor in high-to-low voltage step-down converters.

• Function: Provides a stable, clean 12V or 48V power supply for low-voltage electrical components such as lights, audio systems, and controllers.

II. Renewable Energy & Energy Storage

Photovoltaic (PV) Inverters

• Role: Serves as a filter inductor on the inverter output side of string or micro-inverters.

• Function: Similar to NEV inverters, it converts DC power into pure sine wave AC power that meets grid requirements.

  
  

Energy Storage Systems (ESS) / Power Conversion Systems (PCS)

• Role: Acts as a bidirectional conversion inductor in battery charge/discharge management circuits.

• Function: Facilitates bidirectional energy conversion between the battery (DC) and the grid (AC), providing energy storage, filtering, and ripple suppression.

  
  

III. Industrial & Communication Power Supplies

High-Power Server/Communication Power Supplies

• Role: Serves as a PFC or power inductor in AC-DC or DC-DC power factor correction and conversion stages.

• Function: Ensures high efficiency and high power density even under heavy loads.

  
  

Industrial Inverters & Servo Drives

• Role: Output filter inductor.

• Function: Similar to NEV drives, it is used to drive industrial motors, improving control precision and operational efficiency while reducing interference to the grid and motor.

IV. Specialized Power Supplies & Other Fields

• Welding Equipment: High-frequency, high-current filtering in inverter welders.

• Uninterruptible Power Supplies (UPS): Inverter output filtering in high-frequency online UPS.

• Medical Equipment Power: High-end devices with stringent requirements for noise reduction and reliability.

About Guangdong Zongheng Technology Co., Ltd.

With 19 years of expertise, Guangdong Zongheng Technology Co., Ltd. focuses on the R&D and intelligent manufacturing of forming winding machines for Air-Core Coils, Alpha Coils, and Voice Coils. Our equipment is widely utilized in smartphones, 3C electronics, New Energy Vehicles, home appliances, aerospace, military, and nuclear power industries.

Contact Us:+86 139-2581-0131 (Mr. Feng)