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Rapid dynamic compensation control apparatus and control method of voltage control type DC/DC converter

A voltage control type, voltage controller technology, which is applied in the direction of conversion equipment with intermediate conversion to AC, can solve the problem of no overcurrent situation handling method, does not involve overcurrent protection malfunction avoidance and current limiting output, and has no idea. The same problems, to achieve the effect of improving the load adaptability and avoiding the malfunction of the current protection

Active Publication Date: 2014-12-03
HARBIN ENG UNIV
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Problems solved by technology

This technical solution is different from the application of the present invention in terms of design ideas, but there is no treatment method for the overcurrent situation involved in the application of the present invention
[0005] In addition, there are also researches such as adopting single-cycle control method and charge balance control algorithm to obtain the fast dynamic response of DC / DC converter, but they are all different from the ideas of the easy-to-implement engineering design method proposed by the application of the present invention. None of them relate to the handling of problems such as capacitive load instantaneous overcurrent protection misoperation avoidance and current limiting output involved in the application of the present invention

Method used

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  • Rapid dynamic compensation control apparatus and control method of voltage control type DC/DC converter
  • Rapid dynamic compensation control apparatus and control method of voltage control type DC/DC converter
  • Rapid dynamic compensation control apparatus and control method of voltage control type DC/DC converter

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Embodiment Construction

[0026] The present invention will be described in more detail below with examples in conjunction with the accompanying drawings.

[0027] combine first figure 1 The fast dynamic compensation control device of the voltage control type DC / DC converter of the present invention is introduced.

[0028] attached figure 1 Middle ① is marked as v for DC power supply dc , which can be in the form of rectified DC power supply or battery power supply. ②The HALL current sensor marked as CS1 is used to detect the flow through the inductance L f The current, ③ is the HALL voltage sensor marked as VS1 for detecting the capacitance C f the terminal voltage. The DC / DC converter adopts a high-frequency transformer isolation form, and the high-frequency transformer is shown as T in the figure. The main circuit of the DC / DC converter on the primary side of the high-frequency transformer is an H-bridge structure, which consists of a switch tube Q containing an anti-parallel diode 1 and Q 3...

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Abstract

The invention provides a rapid dynamic compensation control apparatus and control method of a voltage control type DC / DC converter. The rapid dynamic compensation control apparatus comprises a voltage controller (Gv), a voltage compensation module (VCM), a current limiting module (CLM) and a PWM modulator. Due to the restriction of the switching frequency of a power switch device, the bandwidth of the control loop of a medium and large-power converter is quite low, under general voltage closed loop control, and in case of a load abrupt change, quite large fluctuations are caused to output voltages. Direct correction is carried out on a digit control amount which adjusts a duty ratio in a control system according to the inherent open loop characteristic of a tested converter itself, such that the purpose of rapid compensation is achieved.

Description

technical field [0001] The invention relates to a dynamic compensation control technology of a DC / DC converter. Background technique [0002] For medium and high-power DC / DC converters, when the load current changes suddenly, due to the limitation of the switching frequency of power electronic devices, the bandwidth of the voltage control loop and the filter circuit, etc., because the control system as a whole presents a low-pass characteristic, different systems have a low-pass characteristic. Frequency signals have different attenuation and delay responses, so the linear adjustment ratio of the duty cycle is relatively slow, resulting in a lag in the control effect, making the system unable to quickly track changes in the load current demand, resulting in significant voltage fluctuations, serious Sensitive electronic loads with narrow input voltage ranges may be powered down. [0003] In order to improve the response speed of the DC power supply when the load changes and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28
Inventor 游江闻婷孟繁荣张敬南巩冰
Owner HARBIN ENG UNIV
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