High and Low Frequency Transformers

Transformers, whether high or low frequency, are designed to handle volts accurately and safely, converting voltage and current between coils via magnetic induction.The taotal transmitted energy is related to the material, structure, size and operating frequency of the transformer. If the transmitted energy is a fixed value, the working frequency is high, the number of times of energy transmission in a certain period of time is large. The two kind of transformers can not be mixly used for different frequencies.

There are two distinct types of industrial grade power inverters distinguished by the size of their transformers, and the switching speed of their transistors. The ability of an inverter to absorb the electrical surges inherent in certain loads like motors, pumps, and torque-related tools is directly proportional to the physical amount of iron present in the transformer. Size and tolerances of the transistors used in the inversion process, and the speed at which they operate determines the classification of high or low frequency.

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Difference between high and low frequency transformers

High Frequency Transformers

The large majority of inverters available in the retail market are high frequency. They are typically less expensive, have smaller footprints, and have a lower tolerance for industrial loads. HF inverters have over twice the number of components and use multiple, smaller transformers. Their application is appropriate for a wide variety of uses like tool battery chargers, small appliances, A/V and computers, but have a decreased capacity for long term exposure to high surge loads like pumps, motors, and some high-torque tools.

The high-frequency transformer is applied in high-frequency circuits for operating frequency about 10KHz ~ 200KHz. They use ferrite cores. The most common high-frequency transformers are the magnetic antenna of the radio and the high-frequency switching power supply transformer.

Compared to low-frequency transformer, they have small size, cost saving, high transmission power, low leakage inductance, wide frequency range, low temperature rise and stable performancethe, perfect for switch power supply, inverter power supply, power meters, Telecom, and inverter welding machine etc.

Low Frequency Transformers

Our UL-listed, low frequency inverters and inverter/chargers are the pinnacle of electrical durability. The massive iron core transformer is aptly capable of absorbing surge loads because of the “Flywheel Effect” inherent in the physical amount of a transformer’s iron. LF inverters have larger and more robust Field Effect Transistors (FET’s) that can operate cooler, in part due to the slower frequency of switching required to produce AC power. These inverters are feature rich to include the optional ability to hardwire additional external GFCI outlets, input of multiple DC voltages, provide regulated dual output voltages (120/240VAC), and integrate chemistry appropriate battery chargers and transfer relays for shore power.The low-frequency transformer are used in the low-frequency circuit, and the operating frequency is about 0~400Hz. Commonly used step-down transformers, power frequency transformers belong to this category. Made from high permeability silicon steel sheet for the iron cores, the cores can be E-shaped, C-shaped and annular.

They have the advantages of mall flux leakage, no noise, high reliability, low no-load loss, stable and durable performance, high work efficiency, low temperature rise, and high output power which is ideal for some electrical equipment that are sensitive to high-frequency interference, such as external power supply for mobile phone charger and small recorders.