Control method of railway vehicle air conditioner ventilator

Abstract

The invention discloses a control method of a railway vehicle air conditioner ventilator, and belongs to the technical field of railway vehicle air-conditioning systems. The method comprises the following steps: step A, judging whether a 380V alternating-current power supply and a 110V direct-current power supply on a vehicle side are normal or not; step B, carrying out rectification and voltage reduction on 380V alternating-current voltage at the vehicle side through an AC / DC isolation voltage reduction power supply, converting the 380V alternating-current voltage into 110V direct-current voltage as input voltage of a frequency converter, and carrying out stepless regulation on the rotating speed of the ventilator by the frequency converter according to the required rotating speed; and step C, taking the 110 V direct-current power supply as the input voltage of the frequency converter, and enabling the frequency converter to conduct stepless adjustment on the rotating speed of the ventilator according to the required rotating speed. According to the invention, a ventilator driven by the 110V synchronous motor is adopted, so that expensive devices (such as emergency ventilation inverters) used in actual projects can be reduced, and the cost is reduced; and the synchronous motor and the frequency converter are adopted, the rotating speed of the motor can be controlled according to needs, and the efficiency of the ventilator is improved;.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle air-conditioning systems, and in particular relates to a control method for a rail vehicle air-conditioning ventilator. Background technique [0002] The ventilation function is one of the very important functions in the rail vehicle air conditioner, which is realized by the fan installed in the unit. The train inputs two power supply systems to the rail vehicle air conditioner, one is a normal high-voltage AC power supply, and the other is a low-voltage 110V DC power supply. In order to ensure the continuous operation of the ventilation function of the existing track air conditioner, the track air conditioner fan uses a fixed frequency motor (voltage is AC 380V), and when the AC power supply on the high voltage side is normal, it directly drives the air conditioner fan to run; when the high voltage AC power supply is missing, it uses The inverter boosts and inverts the low-voltage 110V DC p...

AI Technical Summary

Problems solved by technology

[0004] 1. Generally, three-phase asynchronous fixed-frequency motors are used for ventilators, and there are only two gears (low speed and high speed) for the adjustment of wind speed. Stepless speed regulation is not possible, and the matching degree of the actual required air volume is low;

[0005] 2. It is necessary to use an expensive inverter to step up and invert the 110V DC voltage, and the inverter is large in size, which will increase the volume and weight of the air conditioning unit design

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