Isolated High Speed ​​Dual Power Switching Device

Abstract

The invention relates to an isolated type high-speed double-power-supply switching device. The isolated type high-speed double-power-supply switching device comprises a first transformer, a second transformer, a third transformer, a fourth transformer, a first switching circuit, a second switching circuit and a control device; a primary winding of the first transformer is connected to a working power supply, and a second winding thereof is connected to a primary winding of the second transformer through the first switching circuit; a primary winding of the third transformer is connected to a reserve power supply, and a second winding thereof is connected with a primary winding of the fourth transformer through the second switching circuit; and the control device is respectively connected to the first switching circuit and the second switching circuit. As the two paths of the input power supplies are switched rapidly through the switching circuits, demands of industrial production on switching time are satisfied; and as the transformers completely isolate the two paths of the input power supplies, the problem of mutual interference of the power supplies is overcome. The isolated type high-speed double-power-supply switching device efficiently increases switching efficiency and reliability of the double power supplies, is suitable for long-term work and has a significant value in the industrial production field.

Description

technical field

[0001] The invention relates to the technical field of power supply switching, in particular to an isolated high-speed dual power supply switching device. Background technique

[0002] In the field of industrial production, a short-term interruption or disturbance of the power supply will cause malfunction, failure or restart of the equipment, which will have a serious impact on industrial production. Therefore, in order to ensure the power supply reliability of important equipment, a dual power supply scheme is usually adopted. Dual power supply needs to solve the following two problems: one is to ensure the effective isolation of the two power supplies, and the short circuit and coupling of the two power supplies cannot be caused; the other is the requirement for the switching time of the two power supplies. The switching time requirement is less than 200 milliseconds, and for control systems and computer equipment, the general switching time requirement i...

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