Novel active temperature control strategy for fully-controlled H-bridge topological structure

Abstract

The invention discloses an active temperature control strategy for a fully-controlled H-bridge topological structure, and belongs to the field of power electronics. The invention aims to solve the problems that the system performance is influenced and passive heat dissipation is limited in the temperature control strategy of the existing power electronic converter power switching device, and discloses the novel active temperature control strategy for the fully-controlled H-bridge topological structure. The strategy comprises the fully-controlled H-bridge topological structure, an active temperature controller and a PWM signal generator. By detecting the dynamic relationship between the temperature of each fully-controlled switch tube and the set threshold temperature, the structure configures different driving signals for all fully-controlled switch tubes, and controls the converter to switch between an H-bridge mode and a bridgeless mode, so that the temperature of the switch tubes is actively controlled by reducing the loss of the specific fully-controlled switch tubes. In the implementation period of the active temperature control strategy, the full-control H-bridge topology can continue to operate normally, thereby improving the initiative for a traditional passive heat dissipation mode, and solving the problem that the performance is reduced through an existing method.

Description

technical field [0001] The invention relates to an active temperature control strategy of a fully-controlled H-bridge topology in the field of reliability research of power electronic converters, in particular to an active temperature control strategy realized by changing the topology modulation mode. Background technique [0002] The fully controlled H-bridge topology is widely used in power electronic converters, such as PWM rectifiers, DC / DC converters, cascaded multilevel converters, and modular multilevel converters. The power electronic converter with a fully controlled H-bridge structure can achieve a higher degree of modularization, which greatly improves the redundancy, scalability and fault tolerance of the entire system. In recent years, with the increase in the number and power density of power switching devices, the reliability of power electronic converters has gradually become a research hotspot. For power switching devices, high-frequency voltage shocks and ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the defects of existing active temperature control methods, and propose an active temperature control strategy based on an improved modulation mode, which is suitable for power electronic converters based on fully controlled H-bridge topology energy unidirectional transmission applications

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