Flying capacitor five-level inverter device
By designing the voltage conversion circuit of the flying capacitor five-level inverter, the harmonic distortion and control coarseness problems of the flying capacitor three-level inverter were solved, and the output waveform was optimized and the device was miniaturized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN LIGOO NEW ENERGY TECH CO LTD
- Filing Date
- 2026-04-22
- Publication Date
- 2026-07-17
AI Technical Summary
The square wave current waveform output by the flying capacitor type three-level inverter has problems such as harmonic distortion, coarse control and poor scalability.
A five-level inverter with a flying capacitor is adopted. The voltage conversion of the positive and negative half-cycles of the sine wave is realized by the first voltage conversion circuit and the second voltage conversion circuit respectively, so that the voltage to ground of the switching node changes in a stepwise manner, thereby reducing the output voltage change rate of the switching node.
The output waveform quality has been optimized, the inductor ripple current has been reduced, and the design of filter inductors with smaller inductance has been supported, which is beneficial for the miniaturization of the device.
Smart Images
Figure CN122419243A_ABST