Control method for improving load dynamic response of LLC resonance circuit, and terminal equipment
A resonant circuit and dynamic response technology, which is applied in the control/regulation system, electrical components, and adjustment of electrical variables, can solve the problems of poor dynamic response ability of LLC resonant circuit, so as to avoid primary side overcurrent and suppress output frequency overshoot , Improve the effect of dynamic response
Active Publication Date: 2021-04-13
ZHANGZHOU KEHUA TECH CO LTD +1
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[0004] In view of this, an embodiment of the present invention provides a control method and terminal equipment for improving the dynamic response of an LLC resonant circuit load, so as to solve the problem of poor dynamic response capability of the LLC resonant circuit in the prior art
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[0018] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0019] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.
[0020] In one embodiment, such as figure 1 as shown, figure 1 It shows the implementation process of a control method for improving the load dynamic response of the LLC resonant circuit, and the process is described in detail as follows:
[0021] S101: Obtain an outp...
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The invention is suitable for the technical field of circuit control, and provides a control method for improving the load dynamic response of an LLC resonance circuit, and terminal equipment. The method comprises the steps: obtaining an output electric signal and a given electric signal of a LLC resonance circuit; calculating the switching period control quantity of the LLC resonance circuit according to the output electric signal and the given electric signal; determining a switching period limit value according to the output electric signal; and performing amplitude limiting on the switching period control quantity by adopting the switching period limit value to obtain a target control quantity for controlling the LLC resonant circuit. By limiting the amplitude of the switching period control quantity, the over-modulation of the output frequency can be effectively suppressed, so that the over-current of the primary side of the transformer is avoided, and the dynamic response capability of the LLC resonant circuit is improved.
Description
technical field [0001] The invention belongs to the technical field of circuit control, and in particular relates to a control method and terminal equipment for improving the load dynamic response of an LLC resonant circuit. Background technique [0002] With the development of switching power supply technology, high efficiency and high power density have become the development trend. Under such circumstances, LLC resonant circuits are more and more widely used in the industry, and at the same time, the industry's requirements for the quality of LLC resonant circuits are also getting higher and higher. [0003] At present, when the LLC resonant circuit is fully loaded or a voltage-type control source load is suddenly applied, the LLC loop response is likely to cause overcurrent on the primary side of the transformer and trigger protection, so the dynamic response capability is poor. Contents of the invention [0004] In view of this, embodiments of the present invention p...
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IPC IPC(8): H02M3/156H02M1/32
CPCH02M3/156H02M1/32Y02B70/10
Inventor 邱雄王志东张晓明牛兴卓王强
Owner ZHANGZHOU KEHUA TECH CO LTD