Method and device for modulating space vector pulse

A technology of space vector and pulse modulation, applied in the field of control, can solve the problems of slow calculation speed and low precision, and achieve the effect of improving accuracy, precision and calculation speed

Inactive Publication Date: 2015-06-03
CRRC DALIAN R & D CO LTD
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  • Abstract
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Problems solved by technology

[0005] The invention provides a space vector pulse modulation method and device, which are used to solve the problems of low accuracy and slow calculation speed of the space vector pulse modulation method in the prior art

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  • Method and device for modulating space vector pulse
  • Method and device for modulating space vector pulse

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] figure 2 A flowchart of an embodiment of the space vector pulse modulation method provided by the present invention, such as figure 2 shown, including:

[0028] 201. Obtain the output voltage of each bridge arm in each switching state in the three-level traction inverter.

[0029] The space vector pulse modulation method provided ...

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Abstract

The invention provides a method and a device for modulating space vector pulse. The method comprises the following steps: obtaining output voltage of each bridge arm in each on-off state in a three-level traction inverter; converting the output voltage of each bridge arm in each on-off state into an m-n coordinate system to obtain a corresponding vector of each on-off state in the m-n coordinate system, wherein an included angle between an m axis and an n axis is 60 degrees; obtaining a reference vector of the three-level traction inverter and the action time of the reference vector; according to the reference vector and the corresponding vectors of every on-off states in the m-n coordinate system, determining the corresponding vectors of at least three on-off states in the m-n coordinate system needed for synthesizing the reference vector; separately determining the action time of each of the at least three on-off states in the action time of the reference vector according to the reference vector, the action time of the reference vector and the corresponding vectors of the at least three on-off states in the m-n coordinate system.

Description

technical field [0001] The invention relates to the field of control technology, in particular to a space vector pulse modulation method and device. Background technique [0002] At present, the traction inverters of electric locomotives in my country mainly use three-level traction inverters. The topological structure diagram is as follows: figure 1 As shown, there are 4 switching tubes, anti-parallel diodes and two clamping diodes on each bridge arm. The output voltages of the three bridge arms are V AO , V BO , V CO , with a phase difference of 120°. [0003] In the prior art, the three-level traction inverter adopts the traditional three-level space vector pulse modulation (Space Vector Pulse Width Modulation, SVPWM) SVPWM debugging algorithm in terms of modulation algorithm, and the traditional three-level SVPWM modulation algorithm obtains the three-level The vector corresponding to each switch state in the 27 switch states of the flat traction inverter (V AO , V...

Claims

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Application Information

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IPC IPC(8): H02M7/487
CPCH02M7/487H02M1/0025
Inventor 王乃福徐从谦张林周鹏
Owner CRRC DALIAN R & D CO LTD
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