A variable frequency drive is an industrial device with extremely widespread application. It controls the rotational speed and torque of an electric motor by altering the frequency and voltage of the power supply. Typically, a variable frequency drive incorporates a transformer internally, which converts the voltage and frequency of the input power supply to the required voltage and frequency for the output.

Many instruments require precise voltage and current inputs to obtain accurate test results. Transformers can be employed to stabilise the power supply, providing instruments with an exact power source.

Numerous industrial installations require a stable power supply, and transformers provide the steady voltage these systems demand. For instance, within metallurgical, chemical, and power industries, transformers are extensively employed in various industrial power supply equipment.

Within industrial control systems, common-mode chokes are frequently utilised for power line filtering, suppressing common-mode interference conducted onto power cables to ensure a stable power supply.

In industrial production, amorphous and nanocrystalline transformers play a vital role in power distribution systems.

In industrial motor control, transformers are commonly employed to alter the supply voltage to meet the operational requirements of the motor. For instance, by utilising transformers, the motor's rotational speed and torque can be regulated, thereby achieving precise motor control.

Common-mode inductors are employed for motor starting, operation, and control, enhancing motor efficiency while reducing losses. Leveraging the inductor's capacity to store and gradually release energy, these components limit inrush currents, thereby preventing excessive grid impact during motor start-up.