Hybrid DC electromagnetic contactor

#1. Field of the Invention

#The present invention relates to a hybrid DC electromagnetic contactor, and in particular to a hybrid DC electromagnetic contactor capable of preventing arc occurrence in opening/closing of a hybrid-structured contactor and minimizing a leakage current by connecting a semiconductor switch to a mechanical contact switch in parallel.

#2. Description of the Prior Art

#The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

#In the drawings:

#FIG. 1 is a circuit diagram illustrating a construction of the conventional AC hybrid switch;

#Hereinafter, the preferred embodiment of the present invention will be described in detail with reference to accompanying drawings.

#FIG. 3 is a circuit diagram illustrating a construction of a DC hybrid contactor in accordance with the present invention.

#As depicted in FIG. 3, the DC hybrid contactor in accordance with the present invention includes a power unit 20 for supplying a certain power voltage; a main contact point 24 for providing a supply path of the power voltage by being switched according to the voltage apply to an operational coil 26; a first semiconductor switch 25 for providing a supply path of the power voltage according to a gate signal; a snubber circuit 21A for charging the both ends voltage of the first semiconductor switch 25 in the turn-off of the first semiconductor switch 25, being applied current and discharged when the charged voltage is not less than a certain voltage; and a discharge current removing unit 21B for removing the discharge current by providing a discharge current path to a load block 22 in turn-on of the switch 25.