A MAGNETIC BEARING HAVING PERMANENT MAGNET AND ELECTROMAGNET

摘要

PURPOSE: A magnetic bearing using a permanent magnet and an electromagnet is provided to minimize the magnetic flux by an electromagnet from being missed due to a permanent magnet by forming a connecting hole on an iron core in order for the magnetic flux by a magnet not to pass through the permanent magnet. CONSTITUTION: A magnetic bearing using a permanent magnet and an electromagnet comprises a magnet section(200). The magnet section surrounds a rotary shaft(110) and lifts a lifting object(120) of a plate shape which is projected in the traverse direction of the rotary shaft. The magnet section comprises an iron core(210), a permanent magnet(220) and a coil(230). A permanent-magnet mounting groove of a ring shape is formed on a first surface of the iron core. A coil mounting groove of a ring shape is formed on a second surface facing the first surface. A connecting hole(216) of a ring shape is formed, which connects the coil mounting groove to the permanent-magnet mounting groove. The permanent magnet is mounted so that the inner surface and the outer surface make contact with the permanent-magnet mounting groove. The coil is wound in a ring shape on the coil mounting groove.