Three-port DC-DC (direct current) converter topology circuit

Abstract

The invention provides a three-port DC-DC (direct current) converter topology circuit which comprises a control module, a solar array input end, a bus end and a storage battery end, wherein the input end of the control module is connected with the solar array input end, the bus end and the storage battery end respectively. The three-port DC-DC converter topology circuit also comprises a Buck-Boost circuit connected between the solar array input end and the bus end and a double-direction SuperBuck circuit connected between the bus end and the storage battery end, wherein the control end of the Buck-Boost circuit and the control end of the double-direction SuperBuck circuit are respectively connected with the output end of the control module. The three-port topology structure exchanges a bus port of a three-port topology and a port of a storage battery, primary energy transformation is only needed from a solar battery array to a bus, thus efficiency can be greatly improved, the heat consumption of the integral machine is reduced, heat dissipation measures are reduced, and cost is reduced.

Description

technical field [0001] The invention relates to a non-isolated three-port DC-DC converter topology circuit, which can be applied to aerospace power systems, aviation power systems and marine power systems. Background technique [0002] Aerospace power systems, aviation power systems and marine power systems usually use solar arrays as the main power supply, and batteries as the backup power supply. When it is in the illuminated area, the load on the bus is powered by the solar cell array; when it is in the shaded area, the battery is used to supply power to the load on the bus; Battery charging. [0003] The existing three-port converter can realize that the solar battery array can charge the battery and provide energy for the busbar in the illuminated area, and the battery can provide energy for the busbar in the shaded area, as shown in Figure 1. However, this three-port converter has inherent disadvantages: the power conversion from the solar array to the bus needs to g...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of low efficiency of the existing three-port DC-DC converter topological circuit, the present invention provides a three-port DC-DC converter topological circuit, including a control module and solar arrays respectively connected to the input ends of the control module Input terminal, bus terminal and storage battery terminal; also includes a Buck-Boost circuit connected between the solar array input terminal and the bus terminal, and a bidirectional SuperBuck circuit connected between the bus terminal and the storage battery terminal , the control end of the Buck-Boost circuit and the control end of the bidirectional SuperBuck circuit are respectively connected to the output end of the control module

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