A kind of hysteresis compensation control method and digital control system using it
A digital control system and hysteresis compensation technology, applied in the field of power electronics, can solve problems such as limited duty cycle
Active Publication Date: 2016-05-25
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology
[0003] Although the above-mentioned hysteresis-one-beat control method solves the problem of limited duty cycle, the hysteresis characteristic it introduces brings new problems to the design of the control system.
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[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0059] The embodiment of the present application discloses a hysteresis compensation control method and a digital control system using it, so as to eliminate the hysteresis characteristics of the control system on the premise of ensuring the stability margin and dynamic characteristics of the control system.
[0060] The lag compensation control method provided in Embodiment 1 of the present application is based on a digital control system. The digital co...
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The invention discloses a lag compensation control method and a digital control system with the same. The lag compensation control method comprises the steps of correcting an output modulating wave of an existing digital control system controlled by the one-beat lag through a compensation coefficient, determining a modulating wave numerical value of a current beat, storing the modulating wave numerical value of the current beat to a control register, conducting one-beat lag processing by the control register according to the adjusted modulating wave numerical value of the current beat, and forming a duty ratio to control a switching circuit of a corresponding driving system. Therefore, compared with the prior art in which an output signal of a discrete control link is directly used as the modulating wave numerical value of the current beat to conduct the one-beat lag control, the lag compensation control method solves the problem that the system output duty ratio is limited through a one-beat lag link, the one-beat lag characteristics are compensated through a compensation link, the system control bandwidth is not required to be changed, the stability margin and the dynamic characteristics of the system are ensured, the new sampling quantity is not required to be led in, and the lag compensation control method is simple and easy to achieve, and effectively solves the problems in the prior art.
Description
technical field [0001] The present application relates to the technical field of power electronics, in particular to a hysteresis compensation control method and a digital control system applying it. Background technique [0002] Compared with analog control, digital control has many advantages such as strong anti-interference, flexible control strategy, and easy maintenance. However, the digital control process also has the disadvantage of limited system output duty cycle. Therefore, the existing digital controllers mostly use hysteresis One tap control. Such as figure 1 As shown in the existing digital control block diagram, the system control parameter given value X r The difference between the control parameter feedback value X obtained by sampling is used as the input signal of the discrete controller G(z), and the output signal of the discrete controller G(z) is used as the modulation wave value Vr[0] of the current beat, which is input to the digital control system ...
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IPC IPC(8): G05B19/042
Inventor 刘宝其张彦虎胡兵薛丽英柳萌宗艳玲
Owner SUNGROW POWER SUPPLY CO LTD