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Three-phase controllable pulse power supply rectifier topology and rectification method

A pulsed power supply and rectifier technology, applied in the direction of irreversible AC power input conversion to DC power output, DC power input conversion to DC power output, instruments, etc. In high-power scenarios, power quality reduction and other issues, to achieve the effect of improving system reliability, reducing the number of uses, and reducing costs

Pending Publication Date: 2022-01-07
苏州川涌光电科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] Traditional high-power rectifier power supplies usually use diodes or thyristor rectifiers (multi-pulse converters), and the ripple components in the DC output voltage or current are relatively large, resulting in reduced power quality
[0004] Direct use of pulse width modulation (PWM) rectifiers in small and medium power applications can eliminate current ripples from the source, and has a unity power factor, which has attracted widespread attention in the current power supply field, but its output current is small, and its cost is high. There are technical problems such as circulating current in extremely parallel connection, so it cannot be used in high-power scenarios

Method used

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  • Three-phase controllable pulse power supply rectifier topology and rectification method

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Embodiment

[0049] A three-phase controllable pulse power supply rectifier, specifically a high-power, low-ripple, low-cost hybrid rectifier, which includes a parallel multi-pulse uncontrolled rectifier 1 and a two-stage AC-DC converter, the multiple The pulse uncontrolled rectifier is a three-phase bridge rectification structure composed of diodes or thyristors. The two-stage AC-DC converter can output a ripple current that is equal in magnitude and direction to the ripple current generated in the multi-pulse uncontrolled rectifier circuit. Opposite compensation current;

[0050] In this implementation, the multi-pulse uncontrolled rectifier is set as a 6-pulse uncontrolled rectifier as an example for illustration, and the rectifier uses a diode device. It is understandable that it can also be similarly extended and applied to 12, 18, and 24 pulses. A variety of multi-pulse uncontrolled rectifiers can also use thyristor components, and their overall structure and rectification control me...

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PUM

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Abstract

The invention discloses a three-phase controllable pulse power supply rectifier topology and a rectification method. The rectifier comprises a multi-pulse wave uncontrolled rectifier and a two-stage AC-DC converter which are connected in parallel, the multi-pulse wave uncontrolled rectifier is a three-phase bridge type rectification structure formed by diodes or thyristors, and the two-stage AC-DC converter can output a compensation current which is equal to a ripple current generated in a loop of the multi-pulse uncontrolled rectifier in magnitude and opposite to the ripple current in direction. According to the present invention, the multi-pulse wave uncontrolled rectifier is used as a main power loop, the two-stage AC-DC converter is used as an auxiliary power loop, the auxiliary power loop outputs the compensation current to compensate the ripple current generated by the main power loop, so that the low-cost high-power efficient use is achieved.

Description

technical field [0001] The invention belongs to the technical field of power supply control, and in particular relates to a three-phase controllable pulse power supply rectifier topology and a rectification method. Background technique [0002] Energy is the source of power for the development of human society. With the rapid development of society and economy, the demand for energy continues to increase. The rectified power supply output direct current has a wide range of applications in many fields. Features such as high reliability, high efficiency and low current ripple. [0003] Traditional high-power rectified power supplies usually use diodes or thyristor rectifiers (multi-pulse converters), which have large ripple components in the DC output voltage or current, resulting in reduced power quality. [0004] Direct use of pulse width modulation (PWM) rectifiers in small and medium power applications can eliminate current ripples from the source, and has a unity power f...

Claims

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Application Information

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IPC IPC(8): H02M7/08H02M3/155
CPCH02M7/08H02M3/155
Inventor 贺明智刘辉
Owner 苏州川涌光电科技有限公司
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