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Novel three-phase equilibrium reversible PWM rectifying device

A rectifier, three-phase balance technology, applied in the irreversible AC power input into DC power output, output power conversion device, AC power input into DC power output and other directions, can solve the dynamic response is not fast enough, control structure and complex algorithms, etc., to achieve good dynamic control response, ensure unity power factor, and insensitivity to changes in inductance parameters.

Active Publication Date: 2013-09-25
LIVESINE ELECTRIC SHANGHAI CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

Indirect current control technology is mainly represented by phase-amplitude control (PAC). Its advantage is that the control is relatively simple, but the dynamic response is not fast enough, and it is too sensitive to some parameters. Although direct current control can obtain higher-quality current response, but The control structure and algorithm are more complex

Method used

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  • Novel three-phase equilibrium reversible PWM rectifying device
  • Novel three-phase equilibrium reversible PWM rectifying device
  • Novel three-phase equilibrium reversible PWM rectifying device

Examples

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Embodiment

[0035] Such as Figure 2-3 As shown, a new three-phase balanced reversible PWM rectifier device, the rectifier device is connected to the three-phase AC power supply, including the power switch tube bridge 6 and the control circuit, the power switch tube bridge 6 is respectively connected to the control circuit and the three-phase AC power supply, the input end of the control loop is connected to the three-phase AC power supply, and the output end is connected to the power switch tube bridge.

[0036]The control loop includes a measurement filter loop 1, a software phase-locked loop 2, a phase adjustment unit 3, a DC voltage feedback unit 4, and a hysteresis comparison control unit 5. The input end of the measurement filter loop 1 is connected to a three-phase AC power supply, and the output end is connected to a software lock. The phase loop 2, the software phase-locked loop 2, the phase adjustment unit 3, the DC voltage feedback unit 4 and the hysteresis comparison control u...

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Abstract

The invention relates to a novel three-phase equilibrium reversible PWM rectifying device. The novel three-phase equilibrium reversible PWM rectifying device is connected to a three-phase alternating-current supply and is comprises a power switch pipe bridge circuit and a control circuit. The power switch pipe bridge circuit is connected with the control circuit and the three-phase alternating-current supply respectively, the input end of the control circuit is connected with the three-phase alternating-current supply, the output end of the control circuit is connected with the power switch pipe bridge circuit, and the control circuit controls the power output of the power switch pipe bridge circuit. Compared with the prior art, the novel three-phase equilibrium reversible PWM rectifying device has the advantages of being capable of guaranteeing the sinusoid and unity power factors output by a network side, good in dynamic control response, small in calculated quantity and the like.

Description

technical field [0001] The invention relates to a PWM rectifier control unit, in particular to a novel three-phase balanced reversible PWM rectifier. Background technique [0002] At present, pulse width modulation technology (PWM) has been widely used in various converter devices. However, most of the power devices in power electronic devices work in the switch state, which injects a large number of harmonics and reactive power into the grid, resulting in Serious pollution, and the total power factor is low, the electromagnetic compatibility problem caused by a large number of applications may cause more serious consequences, so it must be limited. The most fundamental measure to solve the above problems is to require the converter device to realize sinusoidal grid-side current and operate at unity power factor. Introducing PWM technology into the control of the rectifier is an extremely effective measure. When the PWM rectifier operates in the rectification state, the vol...

Claims

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Application Information

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IPC IPC(8): H02M7/12H02M7/217
Inventor 舒观澜
Owner LIVESINE ELECTRIC SHANGHAI CO LTD
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