An integrated control system and method for voltage stabilization of an inductive power transmission system

A technology of inductive power transmission and comprehensive control, applied in circuit devices, electrical components, etc., can solve problems such as the decrease of transmission power and efficiency, the increase of strong electromagnetic interference, and the impact on the quality of power transmission, and achieve stable energy transmission and constant voltage output. Effects of improving transmission power and efficiency and improving dynamic tracking performance

Active Publication Date: 2021-06-01
CHINA UNIV OF MINING & TECH
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  • Description
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  • Application Information

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Problems solved by technology

System parameters such as coupling coefficient, system frequency, and resonance parameters sometimes fluctuate greatly with the random relative position movement of the magnetic circuit mechanism. At the same time, the switching of loads will also greatly affect the quality of power transmission, causing transmission power and efficiency to decline. , voltage and current stress fluctuations of components, increase of strong electromagnetic interference, etc.

Method used

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  • An integrated control system and method for voltage stabilization of an inductive power transmission system
  • An integrated control system and method for voltage stabilization of an inductive power transmission system
  • An integrated control system and method for voltage stabilization of an inductive power transmission system

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Embodiment 1

[0084] Embodiment 1: as figure 1 As shown, the inductive power transmission device of the present invention includes: DC voltage source 1, high frequency inverter 2, primary side LCL resonant network 3, secondary side LCL resonant network 4, rectifier circuit 5, filter capacitor 6 and BUCK-BOOST The converter 7 and the load 12; the DC voltage source 1 is connected to the input terminal of the high frequency inverter 2 to provide power for the high frequency inverter 2; the output terminal of the high frequency inverter 2 is input to the primary side LCL resonant network 3 The primary side LCL resonant network 3 is coupled with the secondary LCL resonant network 4, the output terminal of the secondary resonant network 4 is connected with the input terminal of the rectifier circuit 5, and the output terminal of the rectifier circuit 5 is connected with a filter capacitor 6 and BUCK-BOOST converter 7, the output end of BUCK-BOOST converter 7 is connected with load 12;

[0085] T...

Embodiment 2

[0110] Embodiment 2: as figure 1 As an inductive power transfer system with a working frequency of 85kHz, the input DC voltage E dc is 100V, the primary coil self-inductance L p and primary side resonant self-inductance L r The values ​​are the same, both are 35.059μH, the primary resonance capacitance is 0.1μF, the secondary coil inductance and secondary resonance inductance are both 35.059μH, the secondary resonance capacitance is 0.1μF, and the mutual inductance M is 12.271μH. Capacitance C f is 22μF, the inductor L in the DC-DC converter is 50μH, and the capacitor C L 50μF, coil internal resistance R p and R s Both are 0.2Ω, and the load is 30Ω. The process of its high-efficiency constant voltage comprehensive control is as follows:

[0111] According to the efficiency model of the circuit, the optimal load value under the optimal efficiency of the system can be obtained by differentiating the efficiency expression to the equivalent resistance:

[0112]

[0113] ...

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Abstract

The invention relates to a comprehensive control method for high-efficiency voltage stabilization of an inductive power transmission system, which belongs to the technical field of wireless power transmission. The system includes two closed-loop loops, which are the optimal efficiency tracking control loop and the robust constant voltage control loop respectively. The optimal efficiency tracking control loop calculates the efficiency expression by establishing an AC impedance model for the system circuit, and obtains the optimal To optimize the equivalent load, an impedance matching network is added to the secondary side to adjust the duty cycle of the converter so that the equivalent resistance of the rectified output reaches the optimal load value to achieve optimal efficiency tracking. The robust constant voltage control loop, by establishing a parameter perturbation model of the system, sends the difference between the load collection voltage and the input reference voltage to the robust controller, and obtains the high-frequency full-bridge inverter that controls the primary side of the phase shift angle to realize Constant pressure. The optimal efficiency tracking control and closed-loop robust control of the active impedance matching network can better meet the multi-performance requirements of the system's optimal efficiency and output constant voltage.

Description

technical field [0001] The invention relates to the technical field of wireless power transmission, in particular to an integrated voltage stabilization control system and method for an inductive power transmission system. Background technique [0002] The inductive power transfer technology uses the principle of electromagnetic coupling. The high-frequency inverter generates a high-frequency alternating magnetic field in space through the high-frequency alternating current generated by the primary coil, and the pickup coil induces a high-frequency alternating voltage in the high-frequency alternating magnetic field. In this way, the non-contact transmission of energy is realized by utilizing the spatial transfer of energy in the magnetic field. Compared with the traditional wire contact power supply mode, ICPT technology has the characteristics of safety, convenience, easy maintenance, and strong environmental adaptability, which can meet the needs of some special environme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12
CPCH02J50/12
Inventor 夏晨阳孙琪琪李欣宇吴镇贾仁海吴远航路强
Owner CHINA UNIV OF MINING & TECH
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