Limit condition adaptive protection design method suitable for deep space sampling high-power direct current motor

Abstract

The invention discloses a self-adaptive protection design method suitable for a deep space sampling high-power direct current motor under an extreme working condition, and aims at a deep space extreme environment sampling task. On the other hand, the reliability and the safety of the high-power direct-current motor driving circuit and the direct-current motor in the working process under the limiting working condition are ensured; in addition, voltage and current impacts on power devices in the inverter circuit are reduced, so that model selection of the power devices is facilitated, the cost of a protection circuit is reduced, the overcurrent protection function of a driving circuit is achieved, meanwhile, the longest reliable working time and locked-rotor rotating speed value judgment conditions are provided, the locked-rotor protection function of the motor is achieved, and the service life of the motor is prolonged. The continuity of the sampling process is guaranteed to the maximum extent, meanwhile, the reliability and safety of a high-power direct-current motor driving circuit and a direct-current motor body are guaranteed, and good application value is achieved.

Description

technical field [0001] The invention belongs to the technical field of motor drive control, in particular to an adaptive protection design method suitable for deep-space sampling high-power DC motor limit working conditions. Background technique [0002] The lunar soil drilling and sampling device is one of the important tools for lunar exploration, and plays a key role in realizing lunar soil sampling. Lunar soil drilling is a drilling problem under extreme conditions, and it is one of the most technically difficult problems in the field of drilling. The sampling device uses a high-power three-phase permanent magnet brushless DC motor to drive a drill pipe to drill into the lunar soil to collect lunar soil. Due to the extreme environment of the moon, such as low gravity, no water and no air, and the special mechanical properties of the lunar soil with high internal friction angle and low cohesion, During the drilling process, the peak value of the phase current when the DC ...

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Problems solved by technology

[0005] Existing technologies cannot be directly applied to deep space sampling tasks. The main reason is that the extreme environment of extraterrestrial celestial body sampling and deep space exploration impose multiple constraints on volume, weight, power consumption, etc., and the driving capability and overcurrent of aerospace-grade power components. Protection, integration, derating and other technical indicators put forward extremely high requirements, limited by foreign embargoes, high costs and other factors, there are very few components that meet the use requirements, and the use of downgrading will affect the voltage and current of power devices in the inverter circuit Shock and other risks, and the cost is high

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