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A high power high-precision power supply device

A power supply device, high-precision technology, applied in the direction of output power conversion device, negative feedback circuit layout, AC power input conversion to DC power output, etc., can solve the problems of large power supply current output and difficult technology implementation

Inactive Publication Date: 2007-10-17
XINFENGGUANG ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] It is difficult to use ordinary technology in power supply devices that require large power supply current output, high output stability, high precision (up to 1 / 10,000), and large capacity.

Method used

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  • A high power high-precision power supply device
  • A high power high-precision power supply device
  • A high power high-precision power supply device

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Embodiment Construction

[0016] The present invention will be specifically described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Shown in accompanying drawing 1, is the general circuit structure diagram of high-power high-precision power supply device, is made up of main amplifier (1), compensation amplifier (4), load (5), error amplifier (2) and current sensor (3). The main amplifier is composed of multiple power units connected in parallel. By inputting a given signal Vi, the main amplifier outputs current i1, which is sampled by a standard current sensor and compared with the given signal to obtain an error. After being amplified by the error amplifier, it is used as the compensation amplifier. Input, compensate the amplifier output current i2, so the sum of i1 and i2 is the actual load current.

[0018] Attached Figure 2 is the circuit diagram of the unit in the main amplifier. The rectifier is composed of two sets of three-phase uncontrolled full bridges...

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Abstract

The present invention relates to a big-power high-precision power supply device consisting of a main amplifier and a compensating amplifier that are connected in parallel, a load, an error amplifier connected between the main amplifier and a compensating amplifier, and a current sensor; said main amplifier consists of a rectification circuit formed by a two-group three-phase not-controlled full bridges connected in series, a voltage-limited circuit consisting of two capacitors connected in series and a modulation circuit consisting of four IGBT connected in phase series and two clamping diodes. In the present invention, the main amplifier and the compensating amplifier work together, and big current output with high-precision and high degree of stability can be obtained on the load, and a high target of the precision of the output current and the degree of linearity is achieved.

Description

(1) Technical field [0001] The invention relates to a high-precision power supply device, in particular to a high-power high-precision power supply device. (2) Background technology [0002] It is difficult to use ordinary technology in power supply devices that require large power supply current output, high output stability, high precision (up to 1 / 10,000), and large capacity. (3) Contents of the invention [0003] The technical problem to be solved by the present invention is that in order to achieve the above indicators, the circuit has multiple units in the main amplifier using technologies such as module parallel connection, carrier phase shift modulation, and current double closed-loop control, so that the accuracy and linearity of the amplifier output current reach a certain target. The external compensation amplifier adopts a linear amplifier, which has good dynamic characteristics, linearity and stability, and can track the output error of the main amplifier ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/162H03F1/34
Inventor 何洪臣李瑞来方汉学尹彭飞胡顺全
Owner XINFENGGUANG ELECTRONICS TECH CO LTD
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