DYNAMIC SYSTEM RESONANT FREQUENCY DETECTION AND COMPENSATION METHODS FOR WPT AND RELEVANT TECHNOLOGIES

Title:

DYNAMIC SYSTEM RESONANT FREQUENCY DETECTION AND COMPENSATION METHODS FOR WPT AND RELEVANT TECHNOLOGIES

Document Type and Number:

WIPO Patent Application WO/2017/173998

Kind Code:

A1

Abstract:

A method for switch mode DC-AC converter driven oscillation system control, which can make the system always work on "square wave driving, soft-switching and resonant"conditions at the same time so that the system efficiency and power transfer ability can be greatly increased. The proposed method composes of four major techniques: (1) the technique to dynamically monitoring the innate system resonant frequency by detecting the phase difference between the system gate driving signal and the ZVC (Zero Voltage Crossing) or ZCC (Zero Current Crossing) signal of the main oscillation of the system; (2) the technique to realize a kind of Voltage Controlled Soft-switching Capacitor (VCSC); (3) the technique to avoid frequency bifurcation problem of variable frequency systems and (4) the technique to adjust the output pulse width of mono-stable flip flops (or multivabritors) dynamically with a DC voltage.

Inventors:

TIAN JIANLONG (CN)

Application Number:

PCT/CN2017/079538

Publication Date:

October 12, 2017

Filing Date:

April 06, 2017

Export Citation:

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Assignee:

TIAN JIANLONG (CN)

International Classes:

G01R25/00

Foreign References:

CN103607799A	2014-02-26
CN104682712A	2015-06-03
US20110080053A1	2011-04-07
CN103560050A	2014-02-05

Other References: