A Method of Relay Zero Point Arc Extinction with Learning Function

Abstract

The invention provides a method of arc extinction at a zero point for a relay with a learning function. According to a relation of a time point of a rising edge zero crossing point of a time point ofan alternating current and an actual actuation of a relay contact, and actual delay time of a relay contact actuating signal sent by a controller is determined; from a theoretical action time point ofthe relay contact and through the actual delay time, the controller sends the relay contact actuating signal, so that the relay contact actuation is carried out at a nearby time point before the timepoint of the rising edge zero crossing point of the alternating current or the time point of the rising edge zero crossing point of the alternating current. According to the method of arc extinctionat the zero point for the relay with the learning function, the controller sends the actuating signal to the relay through the delay time, the delay time is adjusted, so that the relay contact actuation is carried out at the nearby time point before the time point of the rising edge zero crossing point of the alternating current or the time point of the rising edge zero crossing point of the alternating current, and the electric arcs generated in the relay actuation are reduced.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to a zero-point arc extinguishing method of a relay with a learning function. Background technique [0002] In the prior art, for products that use relays to control high-power loads, the service life of the relay directly affects the service life of the product, so prolonging the service life of the relay is a problem that every product manufacturer needs to consider. The size and magnitude of the arc generated when the relay pulls in will directly affect the life of the relay, which may cause an open circuit, or lead to a loss of control of the load, and may even cause a fire. The traditional zero-point arc extinguishing uses software to collect zero-point delay for a fixed time to extinguish the arc, but there is a difference between the collected zero point and the actual zero point, which leads to arc-extinguishing failure, and it is only because of the difference in MCU timing ...

AI Technical Summary

Problems solved by technology

The size and magnitude of the arc generated when the relay pulls in will directly affect the life of the relay. It can open the circuit if it is light, and cause the load out of control if it is heavy, and may even cause a fire.

The traditional zero-point arc extinguishing uses software to collect zero-point delay for a fixed time to extinguish the arc, but there is a difference between the collected zero point and the actual zero point, which leads to arc-extinguishing failure, and it is only because of the difference in MCU timing itself and the change of the MCU clock caused by the ambient temperature that the arc is extinguished Failure, also due to the difference in the mechanical release time of the relay itself and the change in the mechanical release time caused by the ambient temperature will also cause arc extinguishing failure

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