DC voltage stabilizing power source based on three-phase pulse rectifier and control method thereof

Abstract

The invention discloses a DC regulation power supply based on a three-phase pulse rectifier and a control method thereof. The DC regulation power supply comprises a main circuit, a testing circuit and a control circuit; and the control circuit comprises a TMS320LF2407 DSP, a crystal oscillating circuit, a power supply circuit, an AD sampling circuit and a PWM output isolating circuit. The control method of the DC regulated power supply has various forms including sampling, DC voltage control, AC current control and switching logic control. The DSP is added to the DC regulated power supply and the control method thereof, so that the DC regulated power supply is able achieve the digitalized processing. The input three-phase 380V alternative voltage is processed through controllable direct-current, so that stable 600V direct current voltage is obtained. By adopting a predictive current control method, the shape of incoming current is approximate to that of a sine wave, and the incoming current is same as the input network voltage in phase position, thereby leading the AC input power factor to be approximate to 1, and greatly reducing the pollution on an electric network.

Description

technical field [0001] The present invention relates to a DC stabilized power supply based on a three-phase pulse rectifier and its control method, in particular to a DC stabilized power supply based on a three-phase pulse rectifier that rectifies a three-phase 380V AC to obtain a stable 600V DC in an electric locomotive manufacturing plant Power sources and their control methods. Background technique [0002] When the electric locomotive moves in the manufacturing plant or maintenance base, it needs to use the power supply provided by the ground. This ground power supply is called the motor vehicle power supply. With the popularization of electrification of railway electric locomotives in my country, DC drive electric locomotives have been gradually replaced by AC drive electric locomotives. The motor vehicle power requirements of AC drive electric locomotives are DC 600V, which is completely different from the requirements of DC drive electric locomotives for motor vehicle...

AI Technical Summary

Problems solved by technology

At present, many DC power supplies are still controlled by single-chip microcomputers, and the operation speed and control accuracy are difficult to meet the control requirements of the current technology, and the control method is relatively backward, resulting in poor output stability and high harmonic content, which not only causes great pollution to the industrial grid, but also wastes electrical energy

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