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Interleaving control method for nine-switch converter

A technology of a nine-switch converter and a control method, which is applied in the direction of converting AC power input to DC power output, high-efficiency power electronic conversion, and output power conversion devices, etc., can solve the problems of large loss and high switching frequency.

Inactive Publication Date: 2016-09-14
FOSHAN UNIVERSITY
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Problems solved by technology

[0005] In view of the shortcomings of the prior art above, the purpose of the present invention is to provide an interleaved control method for a nine-switch converter, aiming to solve the problem of high switching frequency and large loss in the existing nine-switch converter control strategy

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  • Interleaving control method for nine-switch converter

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Embodiment Construction

[0057] The invention provides a method for interleaving control of a nine-switch converter. In order to make the object, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0058] Such as figure 1 Shown is the circuit diagram of the nine-switching converter. It includes 9 switching tubes, forming an upper inverter and a lower inverter respectively, and there are 14 possible working combinations of the switching tubes (that is, 14 working modes).

[0059] Such as figure 2 Shown is the interleaving control method of nine switching converters according to the specific embodiment of the present invention. The method comprises the steps of:

[0060]S100. According to the prede...

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Abstract

The invention discloses an interleaving control method for a nine-switch converter. The nine-switch converter comprises an upper inverter and a lower inverter. The method comprises the following steps: A, according to a scheduled output voltage vector of the nine-switch converter, selecting seven voltage space vectors required for synthesizing the output voltage vector from a plurality of voltage space vectors of the nine-switch converter as control vectors; B, calculating to obtain the working time of the selected control vectors; and C, determining the working sequence of the control vectors so as to output the scheduled output voltage vector, wherein the control vector of the upper inverter and the control vector of the lower inverter work alternately. Under the condition of outputting same sine line voltage, the number of adopted circuit modes and the number of power switch tube switching times are reduced, so that the switching frequency and loss of the nine-switch converter are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of control of nine-switch converters, in particular to an interleaving control method of nine-switch converters. Background technique [0002] figure 1 The nine-switching converter shown, as an indispensable power electronic device in industrial applications, is widely used in power systems, high-speed trains, electric vehicles, large uninterruptible power supplies (UPS), new energy power generation and other fields. However, as the power of the nine-switch converter increases and the switching frequency of the power switch tube increases, the switching loss of the power switch tube increases, which has become a key issue restricting the development of high power density inverters. [0003] In terms of three-phase converter control, compared with the SPWM strategy, the Space Vector Pulse Width Modulation (SVPWM) technology has a smaller harmonic component of the output current waveform, and a higher utiliza...

Claims

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Application Information

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IPC IPC(8): H02M7/5387
CPCH02M7/5387H02M1/0054Y02B70/10
Inventor 李湘峰屈莉莉
Owner FOSHAN UNIVERSITY
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