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Efficiency optimization control method for wireless power transmission system

A technology for wireless power transmission and efficiency optimization, which is applied in power management, output power conversion devices, and conversion of AC power input to DC power output. Achieve zero-voltage turn-on and avoid system failure problems

Pending Publication Date: 2022-02-15
XIAN UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an efficiency optimization control method for a wireless power transmission system, which solves the problems of complex control and easy loss of soft switches in the prior art

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  • Efficiency optimization control method for wireless power transmission system
  • Efficiency optimization control method for wireless power transmission system
  • Efficiency optimization control method for wireless power transmission system

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] An efficiency optimization control method for a wireless power transfer system, a wireless power transfer system based on a bilateral LCC compensation network, such as figure 2 As shown, the wireless power transfer system based on the bilateral LCC compensation network includes sequentially connected PFC modules, high-frequency inverters, resonant networks, and high-frequency rectifiers:

[0043]The high-frequency inverter consists of four power tubes, each bridge arm is formed by two power tubes in series, and the midpoint of the bridge arm is connected to the resonant network.

[0044] The resonant network is divided into two sides, the primary and the secondary, which are respectively composed of a resonant capacitor, a compensation inductance, and a main coil. The output of the resonant network is connected to the midpoint of the...

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Abstract

The invention discloses an efficiency optimization control method for a wireless power transmission system. The efficiency optimization control method comprises the following steps: step 1, a control system is accessed to the wireless power transmission system based on a bilateral LCC compensation network; 2, according to the detected voltage and current values of the secondary side direct current side and a duty ratio value beta s obtained by sampling an input voltage vcd duty ratio detection circuit, a phase update value in a main control PWM module is obtained, and phase locking and output voltage and current control are achieved; the input current irs is ahead of the input voltage vcd through a phase-locked link, so that the input impedance of the rectifier is capacitive, and zero-voltage switching-on of the secondary side rectifier is realized; and the duty ratio beta s of the input voltage vcd is controlled through the voltage loop controlled rectifier, so that the output voltage V2 and the current I2 are controlled; and step 3, the working mode of an inverter is adjusted according to the adjustable range of the input voltage of the inverter. According to the invention, the output voltage and current control of the system is simplified without depending on communication and control.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission, and relates to an efficiency optimization control method for a wireless power transmission system. Background technique [0002] With the gradual popularization of electric vehicles, the wireless charging of electric vehicles has become a very advantageous charging method. Compared with the traditional wired charging method, it is flexible and convenient to use, less maintenance, adaptable to harsh environments, and easy to realize unmanned automatic power supply. And the advantages of mobile power supply. A wireless charging system for electric vehicles needs to achieve high transmission efficiency throughout the charging process, while having constant voltage (CV) and constant current (CC) charging capabilities. [0003] In order to improve the efficiency of the system, soft switching and load impedance matching techniques are often used. In order to achieve soft switching...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/12B60L53/12H02M7/5387
CPCH02J50/12B60L53/12H02M7/5387Y02T10/70Y02T10/72Y02T10/7072Y02T90/14Y02T90/16
Inventor 高青青伍敏张嘉伟徐藩张泽磊
Owner XIAN UNIV OF TECH
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