Three-level inverter dead time compensation control method
A three-level inverter and dead zone compensation technology, which is applied to electrical components, AC power input to DC power output, output power conversion devices, etc. Problems such as pressure drop
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[0113] A dead zone compensation control method for a three-level inverter, such as figure 1 As shown, the specific steps are:
[0114] ① According to the topology structure of the three-phase three-level PWM inverter, considering the delay time for the switch device to be completely turned off, this embodiment sets the corresponding dead time T d = 10μs;
[0115] ② According to the power device of the three-phase three-level PWM inverter, determine its turn-on delay T on = 7μs and turn-off delay T off = 7μs;
[0116] ③Considering the power tube voltage drop of the three-phase three-level PWM inverter and the tube voltage drop of the clamping diode, calculate the general expression of the output midpoint voltage of the three-phase three-level PWM inverter;
[0117] Such as figure 2 As shown, taking phase A as an example, when i as When >0, the voltage of the actual output point a to the midpoint O is
[0118] V ao = ...
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