189results about "Electromagnet terminals/connectors" patented technology

The present invention relates to a field coil assembly of an electromagnetic clutch for a compressor and a method for manufacturing the same. A field coil assembly 20 of the present invention includes a coil installed to a core 22 and made by winding a wire W to generate a magnetic flux, and a connector 30 coupled thereto. At this time, the connector 30 is provided at one side of the core 22 and has a terminal 50 therein, thereby being electrically connected to one end of the wire W. In addition, a protective coating portion 80 is formed at a connecting portion between the terminal 50 and the end of the wire W to thereby prevent the connecting portion of the wire W and the terminal 50 from being exposed to the outside. According to the present invention, the connecting portion between the terminal 50 and the coil is not exposed to moisture or air, thereby preventing electric short circuit from occurring by galvanic corrosion between the terminal 50 and the coil. As a result, there is an advantage in that the operation reliability and durability of the field coil assembly are improved.

The invention provides a coil unit of electromagnetic contactor and assembling method thereof. In a coil unit of an electromagnetic contactor in which a coil having a coil strand as a conductor wire wound around a flanged bobbin is mounted on a leg of a stationary core of an operating electromagnet, into one flange of the bobbin are press fitted a pair of terminal metal pieces respectively corresponding to an initial side lead wire as an initial side conductor wire and a final side lead wire as a final side conductor wire of the coil, and each of the terminal metal pieces is formed with a press fitting base for making the terminal metal piece press fitted into the one flange, a coil connecting arm around which the lead wire as the conductor wire of corresponding side of the coil is wound and a tab terminal made to have a plug-in connection with a corresponding connector of an extension lead. The initial side conductor wire is wound on a coil connection arm 19b of a terminal metal piece19 and the coil strand is wound on the coil on the bobbin to form the coil. The final side connector wire is wound on the coil connection arm 19b of another terminal metal piece 19. Subsequently thelead wound on each coil connection arm is welded. In addition, the tab terminal is in plug-in connection with connector of the extension lead for external connection and serial connection, therefore the coil unit is assembled into double-coil unit.

According to the invention, the coil of a magnet coil arrangement has a coil body which comprises a winding (14) and is extruded with plastic (17). A plug-in base with contact connectors is formed on the coil, wherein one of the connectors is used for connection of the grounding conductor (18). A metallic housing is placed over the coil. Connection of said metallic housing to the contact connector associated to the grounding conductor is achieved by means of a connection element which is guided through a recess of the plug-in base. A sealing element (42) disposed between the connection element and the recess prevents penetration of a fluid from a region between the metallic housing and the coil, into the region where a connector is connected to the contact connectors. In order to improve the electrical connection between the contact connector associated to the grounding conductor and the metallic housing, for a connection element (31) which is threaded in the metallic housing, a cylindrical metallic part is placed between the contact connector and the metallic housing. A respective sealing element (41, 42) is placed between the connection element and the metallic cylindrical part as well as between said part and the recess of the plug-in base. Such magnet coil arrangements are used in electromechanically-controlled hydraulic valves in which metallic parts accessible from outside must be connected to a grounding conductor.