IGBT switching frequency
The switching frequency of IGBT refers to the frequency at which it is turned on and off, usually expressed in Hertz (Hz). The frequency of switching directly affects the switching loss, efficiency, volume, weight, and heat dissipation design of power electronic systems.
Switching loss refers to the energy loss generated by IGBT during the opening and closing processes. As the switching frequency increases, the switching loss will also increase accordingly. Therefore, when selecting the switching frequency of IGBT, it is necessary to balance the efficiency and losses of the system.
Meanwhile, as the switching frequency increases, the volume and weight of the system will also decrease. This is because high switching frequency can reduce the size and weight of components such as filters and cables. However, high switching frequencies can also lead to higher temperatures and greater thermal stress, making heat dissipation design more important.
Interleaved parallel connection
Interleaved parallel connection is a method to reduce harmonic distortion and improve system efficiency. By connecting multiple IGBT modules in parallel and offsetting the on and off times of each module, harmonic distortion in the current waveform can be reduced.
Interleaving in parallel can reduce current peaks and current spikes, thereby reducing stress on cables, filters, and other components. In addition, interleaved parallel connection can also improve the reliability of the system, because when one IGBT module fails, other modules can still continue to work.
The key to achieving interleaved parallel connection is to precisely control the triggering time of each IGBT module. By using control units such as microcontrollers or digital signal processors, the current and voltage of the system can be monitored in real time, and the triggering time of each module can be adjusted as needed.
In summary, the switching frequency and interleaved parallel connection of IGBTs are important concepts in power electronic systems, which have a significant impact on the performance and efficiency of the system. In practical applications, it is necessary to choose the appropriate switching frequency based on actual needs and system limitations.
Yingtong SVG/AHF selects the most reasonable switching frequency to achieve low loss and high efficiency. If any questions about AHF and SVG, welcome to contact us: [email protected]
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