Auxiliary power device of straddle-type monorail train

Abstract

The invention relates to an auxiliary power device of a straddle-type monorail train. The device comprises a main circuit module and a control circuit module, wherein the main circuit module is provided with a filter reactor, a pre-charge circuit, a support capacitor, a three-phase inversion power module and an output transformer; the pre-charge circuit is connected with the support capacitor through an EMI (Electro Magnetic Interference) filter; and the three-phase inversion power module is connected with the output transformer through a three-phase alternating current filter. By the technical scheme of the invention, the main circuit adopts a modular design and has a simple and reliable structure, wherein the power module adopts a heat pipe radiator for heat dissipation, and the heat dissipation power is high, which is beneficial to the improvement of the switching frequency of an IGBT (Insulated Gate Bipolar Translator), thus reducing the harmonic content of the alternating-current output wave shape, improving the power supply quality, and better protecting vehicle-mounted medium voltage equipment; the support capacitor adopts a high voltage film capacitor, thus the service life and the maintenance cycle of the product are long, and the reliability of the product is high; and an auxiliary control unit (ACU) adopts voltage and current double closed-loop control, the control quantity is converted from an alternating current quantity to a direct current quantity and is modulated through SVPWM (Space Vector Pulse Width Modulation), thus the voltage utilization rate is high and the harmonic content is small.

Description

Technical field [0001] The invention relates to an auxiliary power supply device for urban rail trains, in particular, to an auxiliary power supply device for straddle monorail trains. Background technique [0002] Straddle-type monorail trains have many advantages such as small footprint, strong climbing ability, small radius of passing curve, low construction cost, low noise and so on. They have been successfully operated on Chongqing Monorail Line 2. The auxiliary power supply (SIV) provides three-phase AC power for the traction controller, lighting, air conditioning and other equipment of the monorail train. A stable and high-quality auxiliary power supply (SIV) plays an important role in the safe operation of the train. At present, the straddle monorail trains on Chongqing Line 2 still use foreign technology, which is expensive, and once the auxiliary power supply device fails, you need to contact foreign manufacturers for repair or replacement. Repair or replacement takes a...

AI Technical Summary

Problems solved by technology

At present, the straddle-type monorail trains of Chongqing Line 2 still use foreign technology, which is expensive, and once the auxiliary power supply device fails, it is necessary to contact foreign manufacturers for repair or replacement. The maintenance or replacement takes a long time and cannot be repaired or replaced in time, which is time-consuming loss of working time

However, the existing domestic auxiliary power supply devices for trains cannot replace foreign products due to incompatibility in performance parameters, interfaces, stability, etc.

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