Analysis of eddy current damping for short-stroke DC linear motor

Author

Liyi, Li ; Donghua, Pan ; Baoquan, Kou

Author_Institution

Dept. of Electr. Eng., Harbin Inst. of Technol., Harbin, China

fYear

2010

fDate

9-12 May 2010

Firstpage

1

Lastpage

1

Abstract

Eddy currents induced in a conductor in a changing magnetic field produce a damping force proportional to the heat generated in the conductive material. In the DC linear motor system, the conductive plate is added under coils for damping force to improve motor´s dynamic response. In the preliminary work, the formula of magnetic field distribution is obtained by the method of images, so the eddy current inducted in the conductor is calculated. Then the damping force is obtained after the equivalent resistance and inductance of conductance place are calculated. The design of eddy current damping for short-stroke DC linear motor is optimized by the formula of damping force, and obtains the speed of mover when maximal damping force is induced.

Keywords

DC motors; dynamic response; eddy currents; linear motors; conductor; eddy current damping analysis; magnetic field distribution; maximal damping force; motor dynamic response; short-stroke DC linear motor system; Coils; Conducting materials; DC motors; Damping; Design optimization; Eddy currents; Inductance; Magnetic analysis; Magnetic fields; Magnetic materials;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Field Computation (CEFC), 2010 14th Biennial IEEE Conference on

Conference_Location

Chicago, IL

Print_ISBN

978-1-4244-7059-4

Type

conf

DOI

10.1109/CEFC.2010.5481809

Filename

5481809