Combined control method for obtaining optimal efficiency of electric automobile wireless charging system

An electric vehicle, optimal efficiency technology, applied in the direction of electric vehicle charging technology, electric vehicles, battery/fuel cell control devices, etc., can solve problems such as multi-objective control methods that have not yet appeared, and achieve the goal of improving reliability and improving transmission efficiency Effect

Active Publication Date: 2020-01-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no multi-objective control method that can meet the above five requirements

Method used

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  • Combined control method for obtaining optimal efficiency of electric automobile wireless charging system
  • Combined control method for obtaining optimal efficiency of electric automobile wireless charging system
  • Combined control method for obtaining optimal efficiency of electric automobile wireless charging system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] See figure 1 Taking a 500W low-power wireless charging platform as an example, the DC side voltage of the primary-side inverter is 80V, and the inverter adopts phase shift control to invert the DC voltage into a high-frequency AC square wave voltage to drive the transmitter-side resonance network, thus Generate a high-frequency electromagnetic field, the receiving side coil induces a high-frequency electromagnetic field and generates a high-frequency AC voltage, and then after the secondary-side rectifier and capacitor filtering, the electric vehicle battery is charged and used Figure 2 to Figure 4 The control method is described.

[0080] according to image 3 In order to determine the current working condition of the system, the specific operation is: the controller of the primary side inverter and the controller of the secondary side rectifier according to the DC side input voltage V of the primary side inverter 1 And the secondary side rectifier DC side output voltage...

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PUM

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Abstract

The invention discloses a combined control method for obtaining optimal efficiency of an electric automobile wireless charging system. The method comprises the following steps of adjusting the phase shift angle of a secondary side rectifier by using a charging voltage control loop and a charging current control loop so as to control the charging voltage and the charging current of a battery; adjusting the power angle of the secondary side rectifier by using a secondary side ZVS phase angle control loop so as to control the ZVS phase angle of the secondary side rectifier; adjusting the phase shift angle of a primary side inverter by using a primary side ZVS phase angle control loop so as to control the ZVS phase angle of the primary side inverter; and determining the current working condition of the system, and adjusting the ZVS phase angle of the primary side inverter and the ZVS phase angle of the secondary side rectifier through the perturbation and observation method so as to automatically search for a working point of optimal charging efficiency. According to the method, ZVS of the inverter and ZVS of the rectifier are realized on the premise of keeping stable charging voltageand charging current, and the method is capable of automatically searching for the working point of optimal transmission efficiency according to the current working condition.

Description

Technical field [0001] The invention belongs to the field of wireless charging, and relates to a joint control method for the optimal efficiency of an electric vehicle wireless charging system. Background technique [0002] Wireless charging technology is a safe and convenient way of power transmission. It has the advantages of flexible and convenient use, adaptability to harsh environments, and easy realization of unmanned automatic power supply and mobile power supply. Wireless charging technology based on near-field coupling can better meet the requirements of distance, efficiency, power and safety, and has broad application prospects in the fields of electric vehicles, consumer electronics, sensors and implanted devices. With the gradual popularity of electric vehicles, wireless charging technology for electric vehicles has become a current research focus. However, when controlling the wireless charging of electric vehicles, there are several requirements: [0003] 1) Stable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/12B60L53/122B60L58/10B60L53/20H02J50/12
CPCB60L53/12B60L53/122B60L58/10B60L53/20H02J50/12Y02T10/70Y02T90/14Y02T10/7072B60L53/62B60L2240/547B60L2240/549Y02T90/12H02J2310/48H02J7/02H02M3/01H02M3/33573H02M3/33584H02M1/0058H02J50/70H03K17/133
Inventor 王来利蒋勇斌赵晨旭李瑞邦伍敏王跃杨旭
Owner XI AN JIAOTONG UNIV
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