Auxiliary starter for reducing surge impact of power supply

Abstract

The invention discloses an auxiliary starter for reducing surge impact of a power supply. The auxiliary starter comprises the power supply, a current-limiting charging loop, a delayed charging switchloop, a control loop, a delayed starting switch loop and electric equipment. A capacitor with the appropriate capacitance is added at the front end of the electric equipment, an electric appliance isstarted through the electric quantity of the capacitor, and the impact of the starting of the electric appliance to the power supply is reduced through the delayed access of the power supply, and theauxiliary starter has the characteristics that the electrical lives of the power supply and a switch contact are prolonged, the system interference is reduced, and the system stability and reliabilityare improved.

Description

technical field [0001] The invention belongs to the technical field of starting electric appliances of locomotives, and in particular relates to an auxiliary starting device for reducing the impact of power surges. Background technique [0002] Due to the different working environments, working characteristics, and realized functions of all electrical appliances in the electrical field of locomotives and vehicles, the front end of the electrical appliance has a device that provides electrical energy for the electrical appliance. The front end of the device is equipped with a power conversion element in order to achieve a specific function. This electric energy conversion element presents a capacitive or inductive characteristic to the outside. Therefore, at the moment when the electrical appliance is powered on, the capacitor of the electrical appliance will be charged and the level conversion will be realized at the same time. In this process, the excessive starting current...

AI Technical Summary

Problems solved by technology

Therefore, at the moment when the electrical appliance is powered on, the capacitor of the electrical appliance will be charged and the level conversion will be realized at the same time. In this process, the excessive starting current will cause a relatively large surge impact on the power supply.

This impact may interfere with the normal operation of other electrical appliances, reduce the life of the power supply or other electrical appliances, and lead to substandard electromagnetic compatibility; at the same time, the impact and interference process will cause the system power supply to drop, causing digital system errors, or system restart, burning The contact contacts of the switching devices may also cause the connector to ignite and heat up, causing a fire

At present, the commonly used method is to suppress the impact of large current. This general method is suitable for some occasions, but it is not suitable for most electrical circuits. The reason is that the inrush current is excessively suppressed, resulting in the starting current of some electrical appliances being too small to start.

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