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Self-adapting resonance control method for transmitting non-contact electric energy

A technology of electric energy transmission and resonance control, applied in the direction of automatic power control, automatic frequency control components, control/regulation systems, etc., can solve the problems of transmission power and transmission efficiency reduction, natural resonance frequency shift of resonance circuit, etc., to achieve The effect of guaranteeing separability

Inactive Publication Date: 2009-10-14
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an adaptive resonance control method for non-contact power transmission, which solves the problem that the natural resonance frequency of the resonance circuit is shifted due to the difference in compensation capacitance and the change of the load, resulting in transmission power and Problems such as rapid reduction in transmission efficiency

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  • Self-adapting resonance control method for transmitting non-contact electric energy
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  • Self-adapting resonance control method for transmitting non-contact electric energy

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Embodiment Construction

[0015] Specific embodiments of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

[0016] Such as figure 1 As shown, the picture shows the principle diagram of the adaptive resonance control of the non-contact power transmission system based on the phase-locked loop. The detection circuit detects the current signal of the primary coil and converts it into an input signal that meets the control circuit standard; the phase compensation link is used to compensate the time delay caused by the detection circuit; the phase detector compares the phase of the detected current signal with the voltage-controlled oscillator The phase of the output signal is compared to generate an error voltage U corresponding to the phase difference between the two signals d (t); the loop filter, on the one hand, uses its own low-pass characteristics to filter out the error voltage U d The high-frequency components and noise in (...

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Abstract

The invention discloses a self-adapting resonance control method for transmitting non-contact electric energy, which is characterized by obtaining a phase difference by detecting and calculating the voltage and current outputted by a non-contact electric energy transmitting system contravariant mechanism, and adjusting the driving frequency of the inverter by outputting the electric energy to a PI adjustor and an oscillating element. After a transient state process, the phase difference of the voltage and current outputted by the inverter is zero, thus achieving self-adapting resonance control of circuits. The method guarantees separability between the receiving mechanism and the transmitting mechanism of the system only by detecting the voltage and current outputted by the contravariant mechanism, with the self-adapting resonance control function completely achieved by hardware circuits, while complicated control algorithm is not required. The method not only has self-adapting control capability on load change, but also has adjustment actions to the parameter variations of all the components after the output of the contravariant mechanism; besides, the method has the advantages of guaranteeing the system always works under a resonance condition, ensuring the output power and transmission efficiency reach the maximum value, and promoting the practicability process of the transmission technology of the non-contact electric energy.

Description

technical field [0001] The invention belongs to the technical field of power electronics and relates to a non-contact power transmission system, in particular to an adaptive resonance control method for non-contact power transmission. Background technique [0002] Within the scope of the literature searched by the science and technology novelty search, there are only two domestic literatures that discuss the problem of resonance control in the non-contact power transmission system. The document "Constant Current Control Strategy for Non-Contact Power Transmission System" proposes to use the segmented control method to adjust the phase shift angle of the control pulse to solve the current change problem of the primary side loop during the multi-load switching process. The experimental analysis was given, but it failed to solve the problem of how to obtain the maximum transmission power and maximum transmission efficiency of the system; the document "Research on Frequency Stab...

Claims

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Application Information

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IPC IPC(8): H03L7/00H03J7/02G05F1/10H02M3/24
Inventor 赵彪陈希有
Owner DALIAN UNIV OF TECH
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