A generalized device and control method for whole-process surge current suppression based on PWM closed-loop control

Abstract

Disclosed are a novel whole-process surge current suppression generalization device based on PWM closed-loop control, and a control method. The device comprises a DSP controller, a MOSFET, an ADC sampling circuit and a sampling resistor; the sampling resistor can collect currents of a source and a drain of the MOSFET; the ADC sampling circuit can collects a voltage across the sampling resistor inreal time; the DSP controller periodically reads a collected result, and achieves real-time monitoring of the currents of the source and the drain of the MOSFET according to the collected result; and,when a surge current occurs, control for a voltage difference between a gate and the source of the MOSFET can be achieved through an adjustment for a duty ratio of a PWM output signal generated by the DSP controller itself. The device is used to suppress a surge current generated during initial power-on and subsequent step-by--step power-up of complex equipment used in a spacecraft. And the device has the same protection effect when a short circuit occurs due to latching or other faults of equipment.

Description

technical field [0001] The present invention relates to a novel whole-process surge current suppression generalized device and control method based on PWM closed-loop control, that is, a generalized surge current suppression device, which can be used in aerospace vehicles, satellite equipment, etc., which have relatively high requirements for primary busbar protection. It belongs to the field of aerospace electrical, precision instrument and control technology. Background technique [0002] At present, in order to increase the output power of the primary power supply, in aerospace vehicles with relatively high power density such as space stations, cargo spacecraft, and satellites, the primary busbars use a higher voltage level (100V). Under the guidance of this trend, how to safely and reliably use the primary bus to supply power to each stand-alone device on the star, and at the same time how to protect the primary power from being affected when the load device has a latch ...

AI Technical Summary

Problems solved by technology

In the actual engineering application process of this kind of circuit, it is found that the RC parameters are not easy to choose, and it is not easy to change after the design is completed.

Moreover, for complex stand-alone equipment that requires partial power-on, the MOSFET is fully turned on after the initial power-on, and the surge current generated when a large load is turned on later will cause damage to the primary bus. The MOSFET has been fully turned on and cannot suppress the surge current, and the traditional surge suppression circuit has failed at this time

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