Uninterruptible power supply for high-frequency soft switch of locomotive air conditioner and realization method thereof

Abstract

The invention relates to an uninterruptible power supply for a high-frequency soft switch of a locomotive air conditioner, which mainly comprises an access port of a contact network and a three-phase inverter. The uninterruptible power supply is characterized in that after passing a multiple filter network, an input voltage introduced by the access port of the contact network is converted into an output voltage by passing a primary rectification filter circuit, a high-frequency inverter, a high-frequency boost transformer, a secondary rectification filter circuit, a PWM (Pulse-Width Modulation) chopper circuit and the three-phase inverter in sequence; and a battery circuit is connected in parallel between the PWM (Pulse-Width Modulation) chopper circuit and the three-phase inverter. The invention also discloses a realization method of the uninterruptible power supply for a high-frequency soft switch of a locomotive air conditioner. The uninterruptible power supply can inhibit the peak pulse voltage of the contact network, and the PWM (Pulse-Width Modulation) chopper circuit adopts a single-phase bridge inverter booster circuit and is controlled by an analog circuit method, and thus, the uninterruptible power supply has the characteristics of good dynamic quality, high anti-jamming capability, and the like.

Description

technical field [0001] The invention relates to a power supply for a locomotive air conditioner, in particular to a high-frequency soft-switch uninterrupted power supply for a locomotive air conditioner and a realization method thereof. Background technique [0002] With the development of my country's railway construction, the number of locomotive heads in the country has approached 10,000. Due to the high-power power supply in the locomotive head and its driving device and other equipment, the temperature inside the locomotive is as high as 50°C to 70°C. If there is no locomotive air-conditioning device at such a temperature, it will greatly affect the safety of equipment operation and the safety of drivers and operators. Physical and mental health can easily cause operational errors and accidents. [0003] At present, there are more than 20 production units of locomotive air-conditioning units in my country, but the frequency of failure of the locomotive air-conditioning...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the current power electronic variable current power supply is easily affected by the poor quality of the catenary power supply, which causes frequent failures of the air conditioning unit equipment, and to provide a method that can effectively reduce the influence of the pin-shaped peak interference voltage, etc., thereby Significantly reduce the high-frequency soft-switching uninterruptible power supply of locomotive air-conditioners caused by frequent equipment failures of air-conditioning units

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