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A control method and control device of a conversion circuit

A technology for converting circuits and control methods, which is applied to output power conversion devices, control/regulation systems, DC power input conversion to DC power output, etc., which can solve the problem of overvoltage of output voltage, inability to stabilize the operating point, and inability to reduce the voltage value and other problems to achieve the effect of preventing output voltage overvoltage, preventing sudden changes in current or voltage, and ensuring stability

Active Publication Date: 2022-08-09
KEHUA DATA CO LTD +1
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Problems solved by technology

[0003] However, in the case of light load or high input voltage, since the minimum duty cycle has been limited to more than 0.5, the output voltage can only be reduced to the minimum value corresponding to the duty cycle of 0.5, which cannot be reduced to meet the control requirements. The voltage value is continuously raised due to uncontrolled, unable to stabilize at the required operating point, which eventually leads to overvoltage of the output voltage

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  • A control method and control device of a conversion circuit
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  • A control method and control device of a conversion circuit

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Embodiment Construction

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be construed to exclude other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] In the claims, description and the above drawings of the present invention, unless otherwise clearly defined, the terms "first", "second" or "third" are used to distinguish different objects, rather than used for Describe a specific order.

[0034] In the claims, description and the above drawings of the present invention, if the terms "including", "having" and their modifications are used, the intention is to "inclu...

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Abstract

The present invention discloses a control method and control device for transform circuits.First control volume; regulate the proportion of the first control volume and the limit processing to obtain the second control volume, the first control volume is processed to obtain the third control volume, and the second control volume and / or the third control areThe quantity follows the linear changes of the first control; the second control volume and the third control volume control the antihypertensive module and the boost module, respectively.The control device is corresponding to the control method.The control method and control device of the present invention is suitable for preventing the output voltage of the transformation circuit, simplifying the control complexity and improving the work stability of the circuit.

Description

technical field [0001] The invention relates to the technical field of conversion circuit control, and in particular, to a control method and a control device of a conversion circuit. Background technique [0002] Existing dual-inductor current mode push-pull circuits such as figure 1 As shown, the characteristic of this topology is: in order to provide a freewheeling path for the inductor current, the duty cycles of the switches S1 and S2 need to have an overlapping area, so the duty cycles of the switches S1 and S2 are greater than 0.5. Generally speaking, closed-loop control of the input current can be used to make the above push-pull circuit work stably. The current closed-loop control loop is such as figure 2 As shown, when the load is sufficient, the push-pull circuit can work stably through the current closed loop. [0003] However, in the case of light load or high input voltage, since the minimum duty cycle has been limited to more than 0.5, the output voltage ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33569Y02B70/10
Inventor 陈文佳吴庆彬陈钦鸿罗春李
Owner KEHUA DATA CO LTD
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