Demagnetizer for rotary magnetic field of ferromagnetic steel pipe


Application Number: 00108100
Application Date: 2000.06.15
Publication Number: 1271947
Publication Date: 2000.11.01
Priority Information:
International: H01F13/00
Applicant(s) Name: General Inst. of Iron and Steel
Address:
Inventor(s) Name: Fan Hong;Yue Dongping
Patent Agency Code: 11207
Patent Agent: liu bei
Abstract A demagnetizer with rotary magnetic field for ferromagnetic steel pipe is composed of demagnetizing coil and power supply. Said demagnetizing coil consists of frame, windings and casing. Said winding is divided into three parts arranged on the frame at intervals. Its three-phase AC power supply can provide AC current to the coil under the control of logic "OR" circuit consisting of relay, AC contector and proximity switch. Its advantages is high demagnetizing effect (the remanence is less than 8 Gs).