Magnetothermal actuator

Abstract

The invention relates to a magnetothermal actuator, comprising: a magnetic actuator including a coil (1) connected in series in a circuit, surrounding a moving iron core (2) and adapted to drive the moving iron core between two positions (2), the two positions constitute two states of the actuator, namely the operating state and the non-operating state respectively; the first device (4) is used to return the moving iron core (2) to the non-operating state of the actuator. a corresponding position; and a thermal actuator comprising a permanent magnet (10) magnetically engaged with a component (8) made of a heat-sensitive material with a low Curie point, the purpose of which is that when the component (8) ) is lower than the Curie temperature, the magnetocaloric actuator is kept in an inoperative state. It is characterized in that a component (8) made of heat-sensitive material is attached to the part (7, 15), the temperature of the part increases with the increase of the current, the second return device (9) is inserted into the permanent magnet (10) and Between the components (8), one of the permanent magnet (10) and the component (8) is fastened to the stationary part, and the other is fastened to the movable part relative to the coil. The purpose is that when the temperature of the heat-sensitive component (8) When their Curie temperature is exceeded, the permanent magnet and the component are separated from each other, and the second return device (9) moves the permanent magnet and the component from a first relative position to a second relative position, the first relative position corresponding to the different positions of the actuator. Operating state, the second relevant position corresponds to the operating state of the actuator.

Description

technical field [0001] The present invention relates to a general magnetothermal actuator (Magnetothermactuator), more specifically relates to a magnetothermal actuator designed for electrical equipment, especially a circuit breaker type electrical equipment, used for a rapid increase in current due to a fault ( such as a short circuit) or a slow increase in current (in the event of a circuit overload), cut off at least one circuit. The invention also relates to electrical equipment with such a magnetocaloric actuator. Background technique [0002] In such devices, the opening of the circuit in the event of the above-mentioned fault is due to the presence of separable fixed and moving contacts, in such a way that the The action of the mechanical trigger lock separates the static and moving contacts. The two contacts are positioned between the two connection terminals, enabling the devices to be inserted in series into the associated lines. [0003] The two types of faults...

AI Technical Summary

Problems solved by technology

[0009] This structure involves the same kind of operation for the two types of faults that the product is intended to detect, making it impossible to optimize the size of the actuator

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