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Five-level SVPWM controller

A five-level, controller technology, applied in the direction of converting irreversible DC power input to AC power output, can solve problems such as difficulty in implementing space vector modulation, and achieve the goal of reducing computational burden, flexible and convenient interface, and improving rapidity. Effect

Inactive Publication Date: 2010-06-02
JIANGNAN UNIV
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Problems solved by technology

Two-level and three-level space vector modulation controllers are relatively convenient to implement, but with the increase of the number of levels, the geometric progression of space vectors increases, which brings great difficulties to the realization of space vector modulation
At present, most of the space vector implementation algorithms for multi-level inverters are based on two-level and three-level space vector modulation techniques, and general algorithms for multi-level inverters are generally given. The specific algorithm of the space vector of the flat inverter and how to use each specific switch vector, switch state and other issues to conduct detailed research

Method used

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  • Five-level SVPWM controller
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Embodiment Construction

[0023] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown: the present invention mainly includes: a sector discrimination module, a sector normalization module, a new coordinate calculation module, an area discrimination module, an action time calculation module, a pulse time segment selection module, a switch state generation module, and a trigger pulse generation module.

[0025] Such as figure 2 Shown: Using the neural network NN1, according to the reference voltage u in the two-phase static coordinate system α * , u β * It is judged which of the 6 sectors the synthetic reference voltage space vector is located in. The structure of the NN1 is 2-3-4-1 (2-3-4-1 represents the layer structure of the neural network, which is used below), wherein the activation function of the first hidden layer is the hard limit Amplitude function, the upper limit is 1, the lo...

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Abstract

The invention relates to a five-level SVPWM controller, mainly comprising a sector judging module, a sector unity module, a new coordinate calculating module, an area judging module, an acting time calculating module, a pulse period selecting module, an on-off state generating module and a trigger pulse generating module. Each module of the five-level SVPWM controller adopts different neural network structures to complete the function thereof, and is realized by integrating on an FPGA chip EP1C6T144C. The five-level SVPWM controller has the advantages of applying a new coordinate system to judge the area of the reference voltage vector, simplifying the area judging method for the convenience of expanding to the SVPWM modulation of more multilevel inverters, integrating the five-level SVPWM controller on one FPGA chip to realize for offering a high-powered special SVPWM controller to high-voltage and high-capacity electrical energy conversion and speed regulation of an AC motor.

Description

technical field [0001] The invention relates to a SVPWM controller, in particular to a five-level SVPWM controller. Background technique [0002] In recent years, diode-clamped multilevel inverters have been widely used in high-voltage and large-capacity power conversion and AC motor speed regulation. Space voltage vector modulation (SVPWM) is one of the control technologies for diode-clamped multilevel inverters. It has become the most researched technology due to its small output harmonic content, high voltage utilization and easy digital realization. , The most widely used control technology. Two-level and three-level space vector modulation controllers are more convenient to implement, but with the increase of the number of levels, the geometric progression of space vector increases, which brings great difficulties to the realization of space vector modulation. At present, most of the space vector implementation algorithms for multi-level inverters are based on two-lev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48
Inventor 潘庭龙纪志成吴定会沈艳霞赵芝璞高春能
Owner JIANGNAN UNIV