Direct current driving numerical control device for high-power IGBT (Insulated Gate Bipolar Translator) rectification circuit

Abstract

The invention relates to a direct current driving numerical control device for a high-power IGBT (Insulated Gate Bipolar Translator) rectification circuit, which comprises two sets of three-phase rectifier bridges which are composed of IGBT elements and diodes, wherein buffer reactors which are connected to a power grid are arranged at line going ends of the rectifier bridges; line outgoing ends of the rectifier bridges are connected to a direct current motor through filter reactors; the direct current driving numerical control device is in a four-quadrant energy feedback structure; when the direct current motor is started, the direct current driving numerical control device is at an alternated current to direct current rectifying state; when the direct current motor is stopped, the direct current driving numerical control device is at an inversion state, so as to inversely convert the direct current into the alternated current and feed energy back to the power grid; the direct current driving numerical control device further comprises an excitation power supply; the excitation power supply is in an H-shaped bridge structure which is composed of two IGBT elements and two diodes; and buffer inductors are respectively arranged at an input end and an output end of the excitation power supply. The direct current driving numerical control device for the high-power IGBT rectification circuit has the advantages that the direct current driving numerical control device can be used for realizing the four-quadrant or two-quadrant control of the direct current motor, reducing the harmonic generation, promoting the power factor of a system, reducing investment and promoting the service life of the direct current motor.

Description

technical field [0001] The invention relates to a high-power IGBT rectifier circuit DC drive numerical control device using a full-control device IGBT. Background technique [0002] At present, DC drive systems using thyristors (thyristors) as power devices have been widely used in various fields of industrial enterprises. However, although the DC drive system controlled by the inherently empty thyristor has the advantages of high starting torque, good speed regulation performance, and fast system response, it still has the problems of low power factor of the grid and harmonic pollution of the grid. The method of power factor and suppression of grid harmonics is to configure reactive power compensation devices, which increases investment costs and causes energy waste. Contents of the invention [0003] The purpose of the present invention is to provide a high-power IGBT rectifier circuit DC transmission numerical control device using a full-control device, which can reali...

AI Technical Summary

Problems solved by technology

However, although the DC drive system controlled by the inherently empty thyristor has the advantages of high starting torque, good speed regulation performance, and fast system response, it still has the problems of low power factor of the grid and harmonic pollution of the grid. The method of power factor and suppression of grid harmonics is to configure reactive power compensation device, which increases investment cost and causes energy waste

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