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Adaptive transmitting end position adjusting method for improving interoperability of electric vehicle wireless charging coils

An adaptive adjustment and wireless charging technology, applied in electric vehicle charging technology, electric vehicles, charging stations, etc., can solve the problems of inconvenient interoperability between rectangular and DD coils, reduce the difficulty of production, reduce the amount of wire used, The effect of increasing the calculation speed

Active Publication Date: 2019-05-21
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantages are: 1. The proposed adaptive position adjustment algorithm is not simple enough to improve the interoperability of rectangular and DD coils, and needs to be optimized; 2. It is necessary to obtain the system output power in real time through wireless communication, and an additional communication loop must be added

Method used

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  • Adaptive transmitting end position adjusting method for improving interoperability of electric vehicle wireless charging coils
  • Adaptive transmitting end position adjusting method for improving interoperability of electric vehicle wireless charging coils
  • Adaptive transmitting end position adjusting method for improving interoperability of electric vehicle wireless charging coils

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specific Embodiment 1

[0048] Such as figure 1 with figure 2 As shown, the present invention provides a method for adaptively adjusting the position of the transmitter to improve the interoperability of electric vehicle wireless charging coils. The method is based on an adaptive system for wireless charging, and the system includes a transmitter, a receiver, and a controller. The method comprises the steps of:

[0049] Step 1: Obtain the coupling coefficient k that meets the charging requirements when the rectangular and DD coils interoperate max ;

[0050] Step 2: Initialize the system before charging, establish the position adjustment mechanism of the transmitter, and obtain the parameters of the transmitter, the receiver coil and the compensation network;

[0051] Step 3: Measure the primary coil current I 1 , The voltage at both ends of the parallel compensation capacitor on the primary side U c1 and I 1 with U c1 Phase difference, calculate the output power P of the inverter, and furthe...

specific Embodiment 2

[0058] Step 1: Establish the circuit required by the system, such as figure 1 shown. The voltage across the capacitor U c1 It can be measured by a voltage sensor, the primary coil current I 1 It can be measured by a current sensor, and the phase difference between the two can be measured by a phase-locked loop function implemented by a controller such as DSP, FPGA or a single-chip microcomputer, and the coupling coefficient k est The calculation of (i) is also realized through the operation function of the controller;

[0059] Step 2: Establish a transmitter position adjustment mechanism. The transmitter position adjustment mechanism proposed by the present invention has position adjustment functions in the X and Y directions, and the position adjustment is performed according to the displacement command issued by the controller;

[0060] Step 3: Perform system initialization. In the process of system initialization, the acquisition of parameters is mainly completed. The ...

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Abstract

The invention discloses an adaptive transmitting end position adjusting method for improving the interoperability of electric vehicle wireless charging coils. In the method, a controller, a transmitting end and a receiving end are adopted to establish a system circuit model, a coupling coefficient meeting charging requirements in interoperation of a rectangular coil and a DD coil and a coupling coefficient obtained by calculation are acquired to adjust the position of the transmitting end, and then the coupling coefficient in the XY direction infinitely approaches the coupling coefficient meeting the charging requirements in interoperation of the rectangular coil and the DD coil. Based on a variable-step-size 'disturbance-observation' algorithm, no complicated mathematical calculation is needed, no extra communication circuit is needed, the coupling coefficient can be predicted simply by measuring transmitting end or ground equipment parameters and serves as a basis for position adjustment, the system structure is simplified, and the disturbance of a strong magnetic field to wireless communication is avoided.

Description

technical field [0001] The invention relates to the technical field of electric vehicle wireless charging, and relates to a method for self-adaptive adjustment of the position of a transmitter for improving the interoperability of electric vehicle wireless charging coils. Background technique [0002] In recent years, due to its convenience, safety, and aesthetics, wireless charging technology has been widely used in the field of electric vehicle charging. The structure and working process of the electric vehicle wireless charging system are as follows: Transmitter - the inverter converts direct current into high-frequency alternating current through DC-AC conversion, and the alternating current output by the inverter is connected to the transmitter installed on the ground or underground. In the coil, a high-frequency electromagnetic field is generated in the charging area; at the receiving end—the receiving coil installed on the chassis of the car induces the high-frequency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/35H02J50/10H02J50/90
CPCY02T10/70Y02T10/7072Y02T10/72Y02T90/12Y02T90/16
Inventor 宋凯杨光郭雨朱春波魏睿智张航
Owner HARBIN INST OF TECH
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