Inductive current prediction independent convergence control method used in bidirectional DC/DC converter

A technology of inductive current and control method, which is applied in the direction of DC power input conversion to DC power output, control/regulation system, instrument, etc., and can solve the problems of slow dynamic response speed and large static difference

Active Publication Date: 2015-07-01
GUANGZHOU JIANTE ELECTRONICS
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Problems solved by technology

[0004] The purpose of the present invention is to provide an independent convergence control method for inductive current prediction

Method used

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  • Inductive current prediction independent convergence control method used in bidirectional DC/DC converter
  • Inductive current prediction independent convergence control method used in bidirectional DC/DC converter
  • Inductive current prediction independent convergence control method used in bidirectional DC/DC converter

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Embodiment Construction

[0133] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0134] Such as figure 1 Shown is the circuit diagram of the bidirectional DC / DC converter in the present invention, including the low-voltage voltage source v l , low voltage source v l The negative pole of the high voltage voltage source v h The cathode of the first switching tube S1 is connected to the emitter, and the high-voltage voltage source v h The anode of the anode is connected to the collector of the second switching tube S2, and the emitter of the second switching tube S2 is respectively connected to the collector of the first switching tube S1 and the inductor L. The first body diode D a1 and the second body diode D a2 Respectively, the first switching tube S 1 , the second switch tube S 2 body diode.

[0135] Wherein, both the first switching tube S1 and the second switching tube S2 are turn-off power switching devices c...

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Abstract

The invention discloses an inductive current prediction independent convergence control method used in a bidirectional DC/DC converter. The method includes that inductive current independent prediction control is adopted to be combined with a steady-state prediction value to perform convergence operation processing on a predication result to enable the predication value to converge towards the steady-state prediction result; control duty ratios of corresponding power tubes are directly calculated through the prediction value and the steady-state prediction value, so that good current control effect is realized. By the method, quick and stable control on inductive current value of a main circuit can be realized, the problem of interruption and continuation of inductive current of the bidirectional DC/DC converter in the process of mode switching can be solved, and duty ratio of a switch tube can be acquired by directly inputting circuit parameters.

Description

technical field [0001] The invention belongs to the technical field of power electronic circuit control, and in particular relates to an independent convergence control method for inductive current prediction in a bidirectional DC / DC converter. Background technique [0002] In recent years, bidirectional DC / DC converters have been widely used in electric vehicles, UPS, microgrids and other occasions. It can realize the bidirectional flow of energy, can greatly reduce the volume weight and cost of the system, and has important research value. With the development of power electronics and the continuous maturity of control technology, the control method for bidirectional DC / DC converter has gradually become a research hotspot. [0003] At present, the control methods for bidirectional DC / DC converters mainly include PI control and fuzzy control. Fuzzy control has the advantages of not needing to establish a mathematical model of the control object, and has strong robustness....

Claims

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Application Information

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IPC IPC(8): H02M3/155
Inventor 张琦何园孙向东安少亮杨惠任碧莹赵双双
Owner GUANGZHOU JIANTE ELECTRONICS
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