Inductive current prediction and complementation convergent control method used for bidirectional DC/DC converter
A technology of inductive current and control method, which is applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc., and can solve problems such as large static difference and slow dynamic response speed
Inactive Publication Date: 2015-08-12
东莞市和发电器配件有限公司
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[0004] The purpose of the present invention is to provide a method for predictive complementary convergence control of inductance current in a bidirectional DC / DC converter, which solves the problems of slow dynamic response and large static difference in the prior art
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[0052] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0053] Such as figure 1 Shown is the circuit diagram of the bidirectional DC / DC converter of 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 positive electrode of the second switching tube S2 is connected to the collector, the emitter of the second switching tube S2 is respectively connected to the collector of the first switching tube S1 and the inductor L, and the driving signals of the first switching tube S1 and the second switching tube S2 are complementary mode, ignoring the influence of the dead zone, the converter always works in CCM mode.
[0054]Wherein, the first switching tube S1 and the second switching tube S2 ...
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The invention discloses an inductive current prediction and complementation convergent control method used for a bidirectional DC / DC converter. According to the invention, inductive current prediction and complementation control is employed, a stable state predicted value is combined, the prediction result is subjected to convergence operation processing, and therefore the predicted value converges towards the stable state predicted result, the control duty ratio of a corresponding switch tube is directly calculated by means of the predicted value and the stable state predicted value, PWM waves in the corresponding duty ratio are generated to control the corresponding switch tube, and therefore a good current control effect is achieved. By employing the inductive current prediction and complementation convergent control method, the value of the inductive current through the circuit of the DC / DC converter can be controlled quickly and stably, and the dynamic response speed is fast. The duty ratio of the switch tube can be directly calculated through the input of circuit parameters, and the static difference is small.
Description
technical field [0001] The invention belongs to the technical field of power electronic circuit control, and in particular relates to a method for predicting and complementary convergence control of inductance current 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 ro...
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Login to View More IPC IPC(8): H02M3/156
CPCH02M3/1563H02M3/1566
Inventor 张琦高建何园孙向东安少亮杨惠任碧莹张波
Owner 东莞市和发电器配件有限公司