DC Permanent Magnet Brushless Motor Converter for Rail Vehicles

Abstract

The invention provides a direct-current permanent magnet brushless motor converter used for a rail vehicle. The direct-current permanent magnet brushless motor converter comprises a direct-current high-voltage circuit, a traction control circuit, an auxiliary converter circuit and a storage battery charger. The direct-current high-voltage circuit comprises a first voltage and current converter, a grounding detection circuit and an input voltage and current detection circuit which are electrically connected in sequence. The first voltage and current converter is electrically connected with an external power grid. The input voltage and current detection circuit is electrically connected with the traction control circuit, the auxiliary converter circuit and the charger. The traction control circuit is used for driving a direct-current permanent magnet brushless motor to pull the vehicle. The auxiliary converter circuit is further electrically connected with alternating-current loads of the rail vehicle and is used for inverting a direct current output by the input voltage and current detection circuit into an alternating current and supplying power to the alternating-current loads. The storage battery charger is further electrically connected with direct-current loads of the rail vehicle and is used for supplying power to the direct-current loads. The converter provided by the invention can be matched with the direct-current permanent magnet brushless motor for usage and also has diversified functions.

Description

technical field [0001] The invention relates to the technical field of rail vehicle electrical equipment, in particular to a DC permanent magnet brushless motor converter for rail vehicles. Background technique [0002] In traditional rail vehicles, the traction motors generally choose DC brushed motors, but DC brushed motors are relatively large. Therefore, the traction motors of rail vehicles are gradually replaced by smaller AC motors, and their converters also require It becomes the corresponding converter for controlling the AC motor. In order to make the traction characteristics of the AC motor equal to the performance of the DC motor, its converter must use complex frequency conversion control technology (especially vector frequency conversion technology) to adjust the speed of the AC motor. This process is more complicated to operate, and the The converter used to control the AC motor has a single function and can only realize the traction control function. [0003...

AI Technical Summary

Problems solved by technology

However, a DC permanent magnet brushless motor converter with multiple functions and supporting DC permanent magnet brushless motors for application on rail vehicles has not yet been proposed.

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