Inverter Competition: Comparison of High Frequency and Power Frequency Technology

Comparison of load capacity between high frequency inverter and power frequency inverter

Inverter, as a key device for converting DC power into AC power, exhibits different characteristics at different operating frequencies. High frequency inverters and power frequency inverters are the two main types, and they have obvious differences in load capacity.

Comparing the core concepts
The complex high-frequency circuit design of the high-frequency inverter is composed of the IGBT module high-frequency rectifier, battery converter, inverter, and bypass circuit.On the other hand, the power frequency inverter comprises a bypass, power frequency boost isolation transformer, IGBT module inverter, thyristor (SCR) rectifier, and is developed using conventional analog circuit principles.

Comparison of conversion efficiency

Because complicated hardware simulation circuits are burnt into the computer and the inverter's operation is controlled through programs, power frequency inverters have a relatively low conversion efficiency. High-frequency inverters provide a greater conversion efficiency and are smaller in size.

different frequencies

The frequency of power frequency inverter is usually around 50Hz, while the frequency of high-frequency inverter is between several thousand Hz to tens of kilohertz. This characteristic determines that they play different roles in different application scenarios and power requirements.

efficiency difference

Under the same power, the efficiency of high-frequency inverters is significantly higher than that of power frequency inverters. This is mainly because the high-frequency inverter uses high-efficiency electronic devices for switching control, thereby achieving more efficient energy conversion.

Cost and scope

The production cost of high-frequency inverters is higher because the electronic components they use are expensive and the production process is more complex. Therefore, relatively speaking, the cost of power frequency inverter is cheaper. Power frequency inverters are mainly used in traditional power electronics fields, while high-frequency inverters are more suitable for high-frequency power electronics applications.

Usage environment

Due to the high switching frequency of high-frequency inverters, high-performance radiators or fans are required for heat dissipation, while power frequency inverters do not need to consider these issues.

The above is a comparison of the load capacity of high-frequency inverters and power frequency inverters. They have significant differences in principles, efficiency, frequency, cost, scope of application and use environment. To guarantee optimum performance and efficiency, you must select an inverter appropriately based on unique application circumstances and needs.