Within the Battery Management System (BMS) of new energy vehicles, common-mode chokes are used to suppress high-frequency noise and harmonics generated during battery charging and discharging processes. This ensures the integrity and accuracy of signal acquisition, prevents erroneous battery state estimation caused by electromagnetic interference, and enhances the overall reliability and stability of energy management functions.

During regenerative braking, transformers are used in the energy recovery system to convert kinetic energy into electrical energy, which is then fed back into the battery. This process improves overall energy utilization efficiency and extends vehicle driving range. For new energy vehicles equipped with auxiliary energy storage systems, such as supercapacitors, high-frequency transformers enable efficient electrical coupling and power conversion between the energy storage modules, the main battery system, and other onboard electrical systems. This supports optimized energy distribution, fast transient response, and flexible energy management strategies.

In motor drive systems, power conversion stages utilize transformers within inverters to convert direct current (DC) into alternating current (AC), supplying the motor with controlled drive signals. The adoption of high-frequency transformers supports higher switching frequencies, enabling more compact and efficient inverter designs and improving overall system power density.

Amorphous magnetic cores, characterized by high permeability and low core losses, are well suited for high-frequency motor drive applications. Their use effectively reduces iron losses and contributes to improved motor efficiency and thermal performance.

High-frequency transformers play a critical role in onboard and offboard charging systems by enabling efficient voltage transformation at elevated switching frequencies. This allows for reduced system size and weight while improving charging efficiency and supporting shorter charging times.

Additionally, high-frequency transformer-based designs enable charging equipment to accommodate a wide range of input voltages and output current requirements, enhancing compatibility, flexibility, and user convenience.

In new energy vehicles, high-voltage direct current from the traction battery must be converted into low-voltage direct current suitable for onboard electronic loads. High-frequency transformers are key components in DC/DC converters, enabling efficient voltage step-down and electrical isolation.

These converters provide stable and reliable power to vehicle lighting, infotainment, control units, and auxiliary systems. Continued advancements in transformer efficiency and power density will support the increasing power demands of advanced electronic and intelligent vehicle architectures.