Full-bridge bidirectional inversion module

Abstract

The present invention belongs to the power source field and provides a full-bridge bidirectional inversion module. The full-bridge bidirectional inversion module comprises a full-bridge inversion main circuit which is connected with a direct current source and an alternating current source; the full-bridge bidirectional inversion module further comprises a sampling logic control circuit which provides control signals for the full-bridge inversion main circuit and an auxiliary power source circuit which provides a power source for the sampling logic control circuit; the full-bridge inversion main circuit comprises four main power tubes; the four power tubes form a full-bridge circuit unit; the gates of the four main power tubes are all connected with the sampling logic control circuit; the full-bridge inversion main circuit further comprises a signal feedback output end; the signal feedback output end is connected with the sampling logic control circuit; and the sampling logic control circuit is connected with the auxiliary power source circuit. With the full-bridge bidirectional inversion module provided by the invention adopted, sudden change of current in a loop can effectively suppressed, burnout caused by the direct connection of two power tubes can be avoided, and energy stored in the primary sides of two coupled inductors can be released in time.

Description

technical field [0001] The invention relates to the field of power supplies, in particular to a full-bridge bidirectional inverter module. Background technique [0002] At present, most of the high-power inverters and UPS power supplies on the market adopt a full-bridge architecture. During normal operation, the four power transistors are turned on alternately to complete the conversion of voltage input to output. Such a full-bridge circuit has a big defect in application: when it is subjected to an external electromagnetic disturbance signal or a component of the circuit itself fails, it will cause the upper and lower power transistors to be turned on at the same time. In this case, the full-bridge power tube in the circuit will directly short-circuit the DC source and cause irreversible damage, so that the power supply cannot work; in addition, it must be equipped with a large reactor to connect to the AC source or the mains, and it must be connected with the AC source. O...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, and provide a full-bridge bidirectional inverter module, which can effectively avoid the burning problem caused by the direct connection of two power tubes, and the switching frequency can be made very high, and the power density is greatly improved

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