LLC resonance type three-port DC-DC converter and control method thereof
A DC-DC, three-port technology, applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve problems such as unfavorable converter high-efficiency operation, converter difficult to achieve ZVS soft switching, etc. Achieve the effect of facilitating energy management and control, reducing quantity and improving power density
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[0025] The present invention will be further described below in conjunction with the drawings.
[0026] Aiming at applications such as renewable energy power generation, electric vehicles and energy storage systems, the present invention proposes an LLC resonant three-port DC-DC converter and its control method. Its circuit structure is as follows figure 1 Shown. The converter is composed of three parts: primary circuit, secondary circuit, transformer plus LLC resonant network. The primary circuit is composed of a full bridge unit integrating two interleaved parallel bidirectional buck-boost circuits, and the secondary circuit is composed of a rectifier circuit. , Transformer plus LLC resonant network consists of high frequency transformer, resonant inductor L r , Magnetizing inductance L m And resonant capacitor C r constitute. By adjusting the duty cycle and frequency of the primary side circuit switch tube, the bidirectional energy transmission between the two ports of the pri...
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