Starting surge current suppression circuit suitable for super-large energy storage capacitor

Abstract

The invention provides a starting surge current suppression circuit suitable for a super-large energy storage capacitor. The circuit comprises an MCU control circuit, a surge suppression circuit and a laser driving circuit which are connected in sequence, wherein the surge suppression circuit is prominently innovated, is internally provided with a plurality of independently arranged current limiting channels controlled by the MCU control circuit, and is used for charging the super-large energy storage capacitor; and the MCU control circuit is the core of the whole circuit and is used for collecting the voltage information fed back by the voltage feedback circuit and controlling the surge suppression circuit to act according to the voltage information so as to reduce the surge suppression current. When the super-large energy storage capacitor is started, the peak power requirement for the power supply devices is greatly reduced through the circuit, the power supply current is stable when the capacitor is charged, and instantaneous interference on other module circuits is avoided; and in addition, the average power consumption of the capacitor can be reduced under the condition that the high-frequency driving is met.

Description

technical field [0001] The invention belongs to the technical field of laser photometry, and in particular relates to a startup surge current suppression circuit suitable for super large energy storage capacitors. Background technique [0002] The working principle of laser photometry driving is: the laser used in photogrammetry often needs hundreds of amps of current at the moment of light emission, and the general power supply or battery can only provide a few amps or more than ten amps of current, so it completely depends on the instantaneous power provided by the power supply It is not feasible to drive the laser. The more mature technology now is to use a large-capacity capacitor to store energy. At the moment of light emission, the energy stored in the large capacitor is used to discharge and drive the laser. The power supply is only used as an auxiliary current to reduce the impact on the power supply equipment. requirements. When charging a large energy storage capa...

AI Technical Summary

Problems solved by technology

When charging a large energy storage capacitor, a huge surge current will be generated at the first startup, which will cause certain interference to the power supply equipment and power module

[0003] The reason for the above phenomenon is: under normal circumstances, before the circuit is started, the capacitor does not store energy, that is, the positive and negative voltage difference is zero.

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