Optimal state trajectory control method for LLC converter adapting to rapid load mutation
An optimal state and trajectory control technology, which is applied in the direction of control/regulation system, output power conversion device, DC power input conversion to DC power output, etc.
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Embodiment 1
[0093] Embodiment 1: Pulse-type load LLC resonant converter based on optimal state trajectory control of the present invention:
[0094] figure 1 Shown is the full-bridge LLC resonant converter as the controlled object, including the first switching tube Q 1 , the second switching tube Q 2 , the third switching tube Q 3 , the fourth switching tube Q 4 , Resonant inductance L r , Resonant capacitance C r , Transformer excitation inductance L m , a transformer with a turn ratio of n:1:1, the first diode D1, the second diode D2, and the input capacitor C in , output capacitance C o , input voltage V in and the output voltage V o , the first switching tube Q 1 and the third switching tube Q 3 The first bridge arm is formed in series, and the second switching tube Q 2 with the fourth switch Q 4 connected in series to form the second bridge arm, where the switching tube Q 1 -Q 4 Both are MOS tubes; resonant inductance L r , Resonant capacitance C r And a transformer...
Embodiment 2
[0101] Embodiment 2: Dynamic load matrix transformer LLC resonant converter based on optimal state trajectory control of the present invention:
[0102] Based on the circuit in Embodiment 1, this example provides an LLC resonant converter with a matrix transformer, such as Figure 9 shown. Compared with Embodiment 1, this embodiment mainly changes the transformer. The transformer is composed of a matrix transformer. The primary side windings of four separate transformers are connected in series to form the primary side of the matrix transformer. The secondary windings of the four transformers are respectively connected to form two rectifier diodes. The full-wave rectifier circuits are connected in parallel. Same as the first embodiment, the present embodiment enables the LLC resonant converter to have a good dynamic response to high di / dt transient loads such as pulse loads by using optimal state trajectory control, and can work stably under sudden load conditions. The desig...
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