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
CN110768546BActive Publication Date: 2020-08-04BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
8 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
Publication Date
2020-08-04

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More