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Phase synchronization detection method and device based on IPT parallel multiple inverters

A multi-inverter and detection method technology, which is applied in the direction of measuring device, phase sequence/synchronous indication, output power conversion device, etc., can solve the problem of high operating frequency, difficulty in correct measurement of output voltage phase, and inconsistency of measured signal propagation delay and other issues to achieve the effect of phase synchronization

Active Publication Date: 2020-12-11
WUHAN UNIV
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Problems solved by technology

Although the phase deviation between the various output voltages of the inverter directly reflects the state of phase synchronization, due to the high operating frequency and the inconsistency of the propagation delay of the measured signal, it is difficult to measure the output voltage phase correctly

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  • Phase synchronization detection method and device based on IPT parallel multiple inverters
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  • Phase synchronization detection method and device based on IPT parallel multiple inverters

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Embodiment Construction

[0051] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0052] In order to provide a stable power supply for the IPT system, all the inverters that make up the parallel multi-inverter system should operate in the same phase; the phase synchronization of the parallel multi-inverter system can be realized by using the master-slave scheme, by using one of the inverters as The leader makes the frequency and phase of other inverters follow the leader. Although the phase deviation between each output voltage directly reflects the state of phase synchronization, it is difficult to measure the output voltage phase correctly due to the high operating frequency and the inconsistency of the propagation delay of the measured signal; on the contrary, since all signal paths are in the same A PCB board, so the measurement of the inverter output phase is more accurate.

[0053] see Figure 4 , a phase s...

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Abstract

The invention provides a phase synchronization detection method and device based on IPT parallel multiple inverters. The device comprises: n inverter modules, wherein one inverter module is a main inverter module, and the other n-1 inverter modules are slave inverter modules; and n driving circuits which are respectively connected with n external coupling inductors ICTi in parallel, wherein i is greater than or equal to 1 and less than or equal to n, each drive circuit comprises four half-bridge switch arms, the four half-bridge switch arms are connected with four coupling inductors ICTij in parallel respectively, and j is larger than or equal to 1 and smaller than or equal to 4. The synchronization state of the inverter voltage phase is reflected according to the error between the inverter output phase and the average value of all the output phases, the output voltage phase is adjusted, phase synchronization of the multiple parallel inverters is achieved, and the function of correctlymeasuring the voltage phase of the multiple parallel inverters is achieved.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission, and in particular relates to a phase synchronization detection method and device based on IPT parallel multi-inverters. Background technique [0002] Currently, IPT (inductive power transfer, wireless power transfer technology) is more and more widely used in modern society. Parallel multi-inverter topology is an effective way to achieve high power wireless power transfer, but for parallel multi-inverter, current balance is a major issue. Parallel multi-inverter topologies share the total current among the individual inverters, while current imbalances are suppressed by properly designed loop suppression controllers or circuit topologies. [0003] In parallel operation of multiple inverters, voltage phase synchronization is also a key issue. Although the phase deviation between the various output voltages of the inverter directly reflects the state of phase synchronization, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/493G01R29/18G01R25/00
CPCG01R25/00G01R29/18H02M7/493
Inventor 邓其军董帅良周洪胡文山
Owner WUHAN UNIV
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