A single-phase rectifier and its control method

A single-phase rectification, single-phase bridge technology, applied in the conversion equipment for intermediate conversion to DC conversion, irreversible AC power input to DC power output, output power conversion devices, etc., can solve the problem of low-order harmonic suppression. limited capacity, etc., to achieve the effects of good current control performance, simple circuit structure, and good harmonic suppression control performance

Active Publication Date: 2020-08-04
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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Problems solved by technology

[0003] The inventor believes that the traditional rectifier control method usually has limited ability to suppress low-order harmonics

Method used

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  • A single-phase rectifier and its control method
  • A single-phase rectifier and its control method
  • A single-phase rectifier and its control method

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.

[0030] The invention proposes a single-phase rectifier and its control method, which is used for the single-phase rectifier of the auxiliary converter in the rail transit vehicle, realizes the sinusoidal AC input current waveform, and is consistent with the phase of the secondary side winding port voltage of the traction transformer, and realizes the transformer The unit power factor of the auxiliary winding output is 1, that is, the single-phase ...

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Abstract

The invention discloses a single-phase rectifier and a control method thereof. The single-phase rectifier comprises a diode single-phase bridge which is used for rectifying an input alternating current into a direct current and of which the output is connected to the midpoint of a bridge arm of a boost half-bridge, the boost half-bridge which comprises a fast recovery diode and a full-controlled device connected in series and is used for controlling the waveform of the input alternating current to be sinusoidal, a direct-current capacitor which is connected with the boost half-bridge in parallel, and a controller which is used for converting the input alternating current into multi-phase currents with different frequencies, carrying out harmonic control on the multi-phase currents, obtaining a given voltage value through multi-phase coordinate transformation, converting the given voltage value into a control pulse and sending the control pulse to the boost half-bridge. By adopting thescheme provided by the invention, independent suppression of each harmonic wave is realized in a virtual multi-phase mode.

Description

technical field [0001] The invention relates to the field of rail transit vehicle equipment, in particular to a single-phase rectifier and a control method thereof. Background technique [0002] Auxiliary converters are important on-board equipment for rail vehicles (locomotives, bullet trains), which provide three-phase AC power for auxiliary loads other than train traction. figure 1 A schematic diagram of the auxiliary converter in a vehicle is shown. Traditionally, a traction transformer with an integrated auxiliary winding has been used to power the auxiliary converter. The auxiliary converter consists of a rectifier and a three-phase inverter. figure 2 A schematic diagram of a rectifier employed in the prior art is shown. The auxiliary load in this way usually does not have the working condition of power feedback, so the rectifier does not need the feedback function. [0003] The inventor believes that the traditional rectifier control method usually has a limited ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/12H02M5/42H02M1/12H02M1/42
CPCH02M1/12H02M1/4208H02M5/42H02M7/12Y02B70/10
Inventor 王方张军窦蕴萍宋春雨李欣
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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