High-voltage pulse power ignition circuit and method based on off-peak charging mechanism

Abstract

The invention relates to the working field of full-electronic safety devices of solid rocket engines, in particular to a high-voltage pulse power ignition circuit based on an off-peak charging mechanism. The high-voltage pulse power ignition circuit comprises an MCU processor, a boosting transformer, a main capacitor, an auxiliary capacitor, a pulse transformer, a voltage detection unit and an igniter, wherein the boosting transformer charges the main capacitor under the high-frequency actuation of the MCU processor; the voltage detection unit is directly connected with the MCU processor through an interface so as to read converted readable voltage values; a cold cathode tube is connected in series with the igniter and the main capacitor; the MCU processor directly charges the low-voltageauxiliary capacitor under the required working condition; the pulse transformer generates peak voltage and discharges electricity under the action of the MCU processor; and the voltage detection unitis directly connected with the MCU processor through the interface so as to read the voltage values. Through the adoption of the design scheme, the problems that the respective voltages of the main and auxiliary capacitors of a full-electronic safety device cannot be controlled in real time in the synchronous charging process, and the risk of accidental ignition exists are solved.

Description

technical field [0001] The invention relates to the working field of all-electronic safety devices for solid rocket motors, in particular to a high-voltage pulse power ignition circuit and method based on a peak shift charging mechanism. Background technique [0002] The safety of the traditional solid rocket motor safety device is realized through the method of mechanical flameproofing. Because the mechanical safety device has problems such as large volume, heavy quality, and large movable parts. With the high integration of electronic technology, ignition technology based on high-voltage pulse power has gradually entered the application stage, and all-electronic safety ignition devices have emerged on this basis. [0003] Such as figure 1 As shown, the working principle of the all-electronic safety ignition device is as follows: After the processor MCU receives the release command, it charges the energy storage capacitor (main capacitor) and the trigger capacitor (second...

AI Technical Summary

Problems solved by technology

[0004] The current all-electronic safety ignition device cannot realize precise control of the main and auxiliary capacitors at the same time during the charging process, and only detects the voltage state of the main capacitor to map the auxiliary capacitors and make fuzzy judgments

However, when the auxiliary capacitor is short-circuited or open-circuited, the mapping will cause MCU to misjudge

Moreover, the main and auxiliary capacitors of the current technology basically reach the rated voltage synchronously, and then wait for the ignition command of the host computer system

During this period, there may be a risk that the auxiliary capacitor accidentally breaks down the cathode tube, causing the main capacitor to discharge in an abnormal sequence, and then ignites the igniter

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