Three-level inverter and zero-crossing switching logic control method thereof
A three-level inverter and switching logic technology, applied in the direction of converting AC power input to DC power output, electrical components, output power conversion devices, etc., can solve the problem of dead zone reduction, circuit failure, and inverter Bridge arm short circuit and other problems, to ensure the effect of normal and stable work
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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0040] An embodiment of the present invention provides a logic control method for zero-crossing switching of a three-level inverter. The three-level inverter is a single-phase diode-clamped three-level inverter, such as figure 2 As shown, in one switching period of the four main switching tubes, it is divided into the first area (I area), the second area (II area), the third area (III area) and the fourth area (IV area) , the first region and the third region are the off states of the main switching transistors Q1, Q2, Q3, and Q4 (indicated as: low level in all drawings), and the second region is ...
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