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A wireless power transfer adaptive frequency tracking method and system based on switching control

A technology of wireless power transmission and frequency tracking, applied in power management, charging stations, collectors, etc., can solve problems such as poor stability and safety of converters, reduce production and maintenance costs, reduce product failure rates, and improve The effect of system efficiency

Active Publication Date: 2020-10-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of poor stability and safety in the control of existing converters, the present invention proposes an adaptive frequency tracking method and system for wireless power transmission based on switching control

Method used

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  • A wireless power transfer adaptive frequency tracking method and system based on switching control
  • A wireless power transfer adaptive frequency tracking method and system based on switching control
  • A wireless power transfer adaptive frequency tracking method and system based on switching control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An adaptive frequency tracking method for wireless power transfer based on handoff control, such as image 3 as shown,

[0036] The method comprises the steps of:

[0037]Step 1: Controlling the soft start of the wireless power transmission inverter power supply system, and preset the control initial value;

[0038] Step 2: The output frequency sampling mechanism 6 performs time domain and frequency domain data preprocessing on the frequency characteristic parameters of the output electric energy of the inverter 2 and the electrical parameters of other auxiliary state switching units 7, such as multi-point Data processing and feature extraction algorithms such as averaging, digital filtering, and discrete Fourier transform.

[0039] Step 3: The state switching unit 7 effectively identifies the output load characteristics by extracting the electrical parameter characteristics described in step 2 and matching with the pre-stored state equation, and divides the power lev...

Embodiment 2

[0043] A wireless power transfer adaptive frequency tracking system implementing the tracking method described in Embodiment 1, such as figure 1 with figure 2 As shown, the system includes: the system includes a DC-DC converter 1, an inverter 2, a transmitting end coupling mechanism 3, a receiving end coupling mechanism 4, a rectifier circuit 5, an output frequency sampling mechanism 6, and a state switching unit 7 and a pulse modulation module 8; the power signal input end of the DC-DC converter 1 is connected to the DC power input; the power signal output end of the DC-DC converter 1 is connected to the power signal input end of the inverter 2 Connected; the coupling end of the transmitting end coupling mechanism 3 is connected to the coupling end of the receiving end coupling mechanism 4 through inductive coupling; the power signal output end of the receiving end coupling mechanism 4 is connected to the power signal input end of the rectification circuit 5 connected; the ...

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Abstract

The invention provides a wireless power transmission adaptive frequency tracking method and system based on switching control, and belongs to the technical field of wireless power transmission of electric vehicles. The system comprises a DC-DC converter, an inverter, a transmitting end coupling mechanism, a receiving end coupling mechanism, a rectifying circuit, an output frequency sampling mechanism, a state switching unit and a pulse modulation module. The system has the characteristics of high stability and high safety.

Description

technical field [0001] The invention relates to a wireless power transmission adaptive frequency tracking method and system based on switching control, and belongs to the technical field of electric vehicle wireless power transmission. Background technique [0002] At present, there are two bottlenecks in the development of electric vehicles: one is the battery problem on the car-from the perspective of recent technology, there are many problems such as volume, weight, price, material, safety, charging speed, and lifespan. The cyclic process of production and use is a process of high pollution, resource consumption, and damage to the ecological environment. These characteristics bring difficulties to the industrialization of electric vehicles; [0003] On the other hand, there is the problem of charging infrastructure on the ground—due to the limitation of battery material characteristics (electric energy density, power density, etc.), the battery charging time is long and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L53/10H02J7/02H02J50/10
CPCH02J50/10Y02T10/70Y02T10/7072Y02T10/72Y02T90/14
Inventor 朱春波周星健
Owner HARBIN INST OF TECH
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