Comprehensive control method for alternating-current electric pump

Abstract

The invention discloses a comprehensive control method for an alternating-current electric pump. The method comprises the following steps: arranging an alternating-current electric pump control box (1) in a system, wherein when the alternating-current electric pump is started, the control box (1) automatically converts the wire connection mode of the three-phase winding of an induction motor (2) in the alternating-current electric pump from delta connection into star connection, thereby realizing reduced voltage starting and reducing the starting current; arranging an electromagnetic unloading valve (3), thereby enhancing the probability of starting success of the alternating-current electric pump and shortening the starting time; and arranging a pump overtemperature switch (5) and a motor overtemperature switch (6), wherein when the pump or a motor is too hot, the overtemperature switches (5, 6) automatically transmit a message to an aircraft control system, thereby realizing automatic fault detection. Compared with the prior art, the method has the advantages of high available power, low starting impulse current, quick starting, high probability of starting success, and capability of realizing automatic fault diagnosis and the like.

Description

technical field [0001] The invention belongs to the design technology of a hydraulic energy system, in particular to a novel comprehensive control method for an AC electric pump. Background technique [0002] When the aircraft AC electric pump source is started, it is generally directly controlled by a contactor. This method is simple in configuration and light in weight, but has the disadvantages of large inrush current amplitude and long duration. When the power of the AC electric pump is large It is easy to cause power failure, which endangers the safety of the aircraft. Therefore, the power of the AC electric pump using this control method is limited; the probability of successful starting is low when starting with load, which will easily cause the pump to burn out and pollute the entire system; when the power supply capacity is limited, The above problems result in the low available power of the AC electric pump, which cannot meet the power demand of the hydraulic syste...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of the existing AC electric pumps, such as large starting impact current, long duration, low probability of successful starting, easy overheating and burning, small available power, and lack of fault detection means.

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