Regulated power supply used for hydraulic servo controller

Abstract

The invention relates to a regulated power supply used for a hydraulic servo controller. The technical proposal is as follows: the input terminals VIN of integrated voltage regulating chips 7815U1 and7915U5 are respectively connected with corresponding output terminals with the voltage of plus or minus 27V of a rectification filter circuit, the output terminals VOUT respectively output plus or minus 15V voltage; the input terminals VIN of the integrated voltage regulating chips 7810U2 and 7910U6 are respectively connected with corresponding 15V voltage, and the output terminals VOUT respectively output plus or minus 10V voltage; the input terminals VIN of the integrated voltage regulating chips 7805U3 and 7905U7 are respectively connected with corresponding 10 V voltage, the output terminals VOUT respectively output plus or minus 5V voltage; and the input terminal VIN of the integrated voltage regulating chips LM317U4 and LM33U8 are respectively connected with corresponding output terminals of a rectification filter circuit with the voltage of plus or minus 27 V. The power supply can simultaneously provide regulated power sources of plus or minus 15V, plus or minus 10V, plus or minus 5V and 0 to plus or minus 4V, and has the advantages of high signal accuracy, simple structure and high reliability.

Description

technical field [0001] The invention belongs to the technical field of voltage stabilized power supplies. In particular, it relates to a stabilized voltage power supply for a hydraulic servo controller. Background technique [0002] The hydraulic servo controller is used to process the given signal to drive the servo valve or proportional valve in the hydraulic servo system, and to condition and convert the sensor signal. It is a key component of the hydraulic servo system. Since the hydraulic servo controller is a high-precision signal processing instrument, it contains different components such as operational amplifiers, power amplifiers, and waveform generators. These electronic components require that the power supply must provide different voltage sources of ±15V, ±10V, ±5V and 0-±24V at the same time, and have extremely high requirements for the accuracy, stability and reliability of the power supply signal. The existing regulated power supply has the following probl...

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Problems solved by technology

[0003] (1) It can only provide +5V, +10V, -5V and 0~+15V voltage sources, and cannot provide ±15V, ±10V, ±5V and 0~±24V voltage sources at the same time;

[0004] (2) The switching power supply is generally used as the servo controller power supply. Although the switching power supply is small in size, its ripple coefficient is large and the signal accuracy is low, which is easy to interfere with the servo controller signal;

[0005] (3) The power supply voltage stabilization function is generally realized by discrete devices, the structure is complex, the stability of the output signal is poor, and the requirements of the hydraulic servo controller cannot be met;

[0006] (4) When the external load is short-circuited, the internal components of the power supply are easily burned

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