Three-level inverter driving device

Abstract

The invention discloses a three-level inverter driving device. The device comprises a main control unit which is used for obtaining the information of a three-phase AC power grid, and obtaining threecontrol signal groups corresponding to three phases according to the information of the three-phase AC power grid, wherein each control signal group comprises a first control signal and a second control signal; and a drive unit which is used for simultaneously acquiring three control signal groups and generating three corresponding driving signal groups according to the three control signal groups, and applying a first driving signal, a second driving signal, a third driving signal and a fourth driving signal in each driving signal group respectively to four switching tubes in the topologicalstructure of the corresponding phase, so that the actual state of the topological structure is a corresponding target state. According to the invention, in the main control unit, only six PWM peripheral ports are required to be connected with the driving unit, so the problem that the three-level inverter occupies a large number of PWM peripheral resources of the main control chip is solved, and the design difficulty and hardware cost of the three-level inverter are reduced.

Description

Technical field [0001] The invention relates to the field of power electronic equipment, in particular to a three-level inverter drive device. Background technique [0002] With the rapid development of distributed photovoltaic power generation technology, photovoltaic inverters are developing from two-level technology to multi-level technology, and three-level technology inverters have been widely used. In the traditional two-level inverter application, in order to complete the inverter function of the three-phase inverter, it is usually necessary to use the 6 PWM peripheral ports of the control chip to realize the driving of the power device, and in the three-level inverter It needs to use the 12 PWM peripheral ports of the control chip to achieve. When the project design requires high PWM peripheral resources, the design difficulty and hardware design cost are high. [0003] Therefore, how to provide a solution to the above technical problems is a problem that needs to be solve...

AI Technical Summary

Problems solved by technology

In the traditional two-level inverter application, in order to complete the inversion function of the three-phase inverter, it is usually necessary to use the six PWM peripheral ports of the control chip to drive the power device, while in the three-level inverter It is necessary to use 12 PWM peripheral ports of the control chip to realize. When the project design has high requirements on PWM peripheral resources, the design difficulty and hardware design cost are high

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