Conventional frequency converters often use rectifier full-wave rectification, thyristor half-control bridge full-wave rectification and thyristor full-control bridge full-wave rectification and other rectifier circuits, and some inverters use PWM-type rectifier circuits. Rectifiers using these circuits are unable to achieve a control effect with a rectifier power factor of 1.0. The Tanggang Hot Rolled Sheet Plant under construction is introducing the newly launched MLEVEC-3000 series high-power inverter from Mitsubishi Electric Corporation of Japan as the main motor drive system. It adopts advanced technologies based on GCT components, neutral point clamp, and three-level PWM vector control, and has made new breakthroughs in the working principle layer, thus realizing the technical dream of rectifier power factor 1.0. This paper starts with a new rectification working principle, and analyzes and introduces this high efficiency rectifier from theory and application. Analysis of the structure of the inverter. Capacitor C and its associated DC bus are considered to be DC powered. It can be found that the entire frequency converter has a symmetrical structure centered on the capacitor C. Appropriately select the impedance value of the ACL to be approximately equal to the impedance value of the AC motor. Then, the rectifier main circuit ACL and the inverter main circuit AC motor can apply symmetric equal vector control methods to form a dual PWM AC drive system. The dual PWM AC drive system makes it possible to vector control the secondary side reactance of the transformer. It should be noted that, like the inverter requires the use of variable frequency dedicated motor, the PWM vector control rectifier also puts forward the corresponding technical performance requirements for the transformer. This paper only analyzes the principle of the rectifier, and does not discuss the corresponding technical changes of the transformer. Customized Solar Panel, 100watt solar panel,200watt solar panel, big solar panel, high efficiency high quality solar modules
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