| 摘要 |
PURPOSE: A contactless magnetic lifter is provided to minimize the generation of counter electromotive force from an electromagnet by switching a full bridge inverter part to flow or break current. CONSTITUTION: A contactless magnetic lifter comprises a DC(Direct Current) conversion part(100), a full bridge inverter part(200), and a MICOM(300). The DC conversion part commutes and smooth input AC(Alternating Current) power source to convert the input AC power source to DC power source. The full bridge inverter part applies the DC power source to an electromagnet or blocks the DC power source to magnetize or demagnetize the electromagnet. The MICOM controls the switching of the full bridge inverter part. In the blackout, the MICOM supplies emergency power source to the full bridge inverter part. [Reference numerals] (100) DC conversion part; (200) Full bridge inverter part; (210) Gate driving part; (300) MICOM; (400) Protective circuit part; (500) Electromagnet part; (600) Momentary blackout compensating part; (700) Battery |
