An electronic control unit capable of supplying adjustable forward and reverse direct current

Abstract

An electric control unit device capable of supplying adjustable positive and negative DC current comprises the components of a double-pole double-throw switch which is provided with a first input end, a second input end, a third input end, a fourth input end, a first output end and a second output end; two sets of adjusting lines, wherein after a first fixed-resistance resistor is serially connected with a first light emitting diode, the first fixed-resistance resistor is parallelly connected with two ends of a first rheostat; after a second fixed-resistance resistor is serially connected with a second light emitting diode, the second fixed-resistor resistor is parallelly connected with two ends of a second rheostat. The output ends of the two sets of the adjusting lines are connected with the first input end, the second input end, the third input end and the fourth input end of the double-pole double-throw switch. The input ''+ '' end of the electric control unit device is connected with the input ends of the two sets of the adjusting lines. The input ''- '' end of the electric control unit device is connected with the second input end and the third input end of the double-pole double-throw switch. The output end of the double-pole double-throw switch is the output end of the electric control unit device. The electric control unit device can realize reverse supplying of current with different magnitudes through one DC power supply and furthermore has a light emitting diode indicating function. High response speed is realized. Furthermore the electric control unit device can be used for calculating actuation time of an electro hydraulic servo valve.

Description

technical field [0001] The invention relates to an electric control unit device, in particular to an electric control unit device capable of supplying adjustable positive and negative direct current. Background technique [0002] When testing civil aviation aircraft components, it is necessary to supply positive and negative DC currents of different sizes to the electro-hydraulic servo valve coil to control the yaw motion of the armature of the electro-hydraulic servo valve. The amplitude of the yaw depends on the magnitude and direction of the current, and the function of electro-hydraulic servo valve control can be realized by controlling the yaw amplitude. [0003] Since the coil input end of the electro-hydraulic servo valve has only two pins, one positive and one negative, the current common practice is to use two DC power supplies to control the electro-hydraulic servo valve respectively. The two DC power supplies first adjust the size of the output DC current. When t...

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Problems solved by technology

[0004] However, there are the following defects in the above test process: when using manual switching of the reverse DC source, the electro-hydraulic servo valve will have an intermediate void period, and the current is not reversely supplied in time, which includes manual disconnection and connection of DC The time of the source cannot be used to calculate the actuation time of the electro-hydraulic servo valve, and its sensitivity cannot be determined; and when the reverse current is manually switched, it is a live operation, and there may be a moment of disconnection and connection. The phenomenon of discharge occurs, which will have a bad influence on the electrical components of the test piece

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