Surge suppression circuit with double independent closed loops

Abstract

The invention discloses a surge suppression circuit with double independent closed loops and aims at solving the problems that an existing circuit is high in production cost and large in occupied volume and is adverse to precision management of an airborne circuit. According to the technical key points, the surge suppression circuit comprises a DC power supply, an inductor, a capacitor, a field effect transistor, an error amplifier, a single-pole double-throw analogue switch and a hysteresis comparator, wherein an output end of the error amplifier is connected with a gate of the field effect transistor and is input into an input end of the hysteresis comparator at the same time; control reference voltage is input into a positive input end of the error amplifier; a negative input end of theerror amplifier is connected with a common terminal of the single-pole double-throw analogue switch; a contact 1 and a contact 2 of the single-pole double-throw analogue switch are connected with sampling current and sampling voltage separately; and the output end of the hysteresis comparator selects conduction of one contact of the single-pole double-throw analogue switch according to the magnitude of the voltage output from the error amplifier.

Description

technical field [0001] The invention belongs to the technical field of aviation power electronic control, and relates to a surge suppression circuit, in particular to a double independent closed-loop surge suppression circuit. Background technique [0002] The power supply equipment of existing airborne high-power transmitters usually adopts a DC power supply circuit, wherein the DC power supply can be provided by the airborne AC power after rectification and transformation, and an inductor, a capacitor and a field effect transistor are connected in series in the power supply circuit. The inductance and capacitor form a filter, which is connected to the DC power supply through the FET, and the rear stage of the filter is connected to the load, and the power supply of the load can be switched by controlling the on-off. [0003] In order to adapt to the large power fluctuation of the transmitter during pulse transmission, the capacitance of the capacitor is usually very large,...

AI Technical Summary

Problems solved by technology

The design of such dual independent closed-loop control circuits, due to the inability to share components, has high production costs and takes up a large volume, which is not conducive to the refinement of airborne circuits.

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