Separate symmetrical half-wave circuit based current control method
A current-controlled, symmetrical technology, applied in the direction of irreversible AC power input conversion to DC power output, etc., can solve the problems of cumbersome symbol operation, complex zero-crossing point, accuracy affecting system control results and performance indicators, etc., to simplify the complexity. , The effect of simplifying the harmonic compensation algorithm and saving operation time
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[0023] In this embodiment, an uninterruptible power supply (UPS) using a VIENNA-like rectifier circuit is taken as an example for illustration. refer to figure 2 As shown, UPS mainly includes VIENNA-like main circuit, IGBT drive circuit, detection board (or detection circuit) and digital signal processor (DSP). The voltage loop and current loop PI regulator used for control are implemented by DSP through executing programs. The VIENNA-like main circuit converts the input AC power into DC power under the control of the power drive signal output by the IGBT drive circuit and outputs it through the DC bus. The detection board obtains the voltage and current signals from the DC bus in the main circuit and feeds them back to the DSP, and the DSP performs the relevant PI regulator operation and outputs the pulse width modulation signal (PWM), which is used to control the IGBT circuit to generate power drive signal.
[0024] Because the positive and negative bridge arms of the VI...
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