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Novel topological structure of sparse two-stage matrix converter

A technology of matrix converter and topological structure, which is applied in the direction of conversion equipment for intermediate conversion to DC, conversion device for converting AC power input into AC power output, output power, etc., which can solve the problem of affecting the reactive power adjustment function of the converter and other problems, to achieve the effect of convenient control, improved reliability, and simple calculation of duty cycle

Active Publication Date: 2015-05-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Therefore, the above defects also limit the input power factor angle of the traditional sparse matrix converter to [-30°, 30°], which affects the reactive power adjustment function of the converter

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  • Novel topological structure of sparse two-stage matrix converter
  • Novel topological structure of sparse two-stage matrix converter
  • Novel topological structure of sparse two-stage matrix converter

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Embodiment Construction

[0026] The present invention provides a novel sparse dual-stage matrix converter topology. In order to make the object, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0027] The system structure that the present invention proposes is as attached figure 2 shown. Three-phase input voltage (u A , u B , u C ) are respectively connected to the input terminals of the rectification stage through three bidirectional switches (S1, S2, S3). The rectification stage is composed of six diodes. Composed of ordinary three-phase inverters, the three-phase output voltage (u U , u V , u W ) is connected to the three-phase AC terminal of the inverter stage. attached figure 2 Among them,...

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Abstract

The invention discloses a novel spare topological structure of a sparse two-stage matrix converter. The structure comprises three two-way controllable switches, a three-phase diode rectifier bridge and a three-phase inverter. With the adoption of the novel topological structure of the sparse two-stage matrix converter, the shortage that the rectifier stage of other two-stage matrix converter easily generates negative pressure which leads to short circuit fault can be overcome, and the system reliability can be effectively improved; in addition, the input reactive power angle adjusting range is expanded to be [-90 degrees, 90 degrees], and therefore, the problem that the input side power factor angle of the traditional two-stage matrix converter can be adjusted within the range of [-30 degrees, 30 degrees]; the topological structure is simple and reliable to control, and relatively high in practical value.

Description

technical field [0001] The invention relates to an electric energy conversion device, in particular to a novel sparse dual-stage matrix converter topology. Background technique [0002] Matrix converter is a new type of AC-AC converter, which has the characteristics of small size, light weight and long working life. It is regarded as one of the alternative topologies of dual PWM converters that are widely used at present, and has been widely studied at home and abroad. . The two-stage matrix converter is a subclass of the matrix converter, including two parts of the rectification stage and the inverter stage. The two parts are connected through the DC intermediate DC bus, but there is no DC energy storage element. Compared with the traditional matrix converter, the two-stage matrix converter has the advantages of simple clamping circuit and easy implementation of commutation control strategy, which has attracted extensive attention of researchers. [0003] When the system...

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Application Information

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IPC IPC(8): H02M5/44
CPCH02M5/458
Inventor 雷家兴周波秦显慧卞金梁石宝平梁莹韩娜
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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