Title page for ETD etd-07082004-115326

Type of Document

Thesis

Author

Wang, Huazhong

Author's Email Address

hwang@eng.fsu.edu

URN

etd-07082004-115326

Title

Study of Polyamide Coating on Aluminum Substrate by Different Methods

Degree

Master of Science

Department

Electrical and Computer Engineering, Department of

Advisory Committee

Advisor Name	Title
Jim P. Zheng	Committee Chair
Hui Li	Committee Member
Thomas L. Baldwin	Committee Member

Keywords

High Temperature Superconductor
Dielectric Strength
Dissipation Factor
Dielectric Constant
Coating
Polyamide

Date of Defense

2004-06-18

Availability

unrestricted

Abstract

ABSTRACT

A 3.5MVA High Temperature Superconductor (HTS) transformer has been in design at FAMU-FSU College of Engineering since 2002. The coils of the HTS transformer use stainless steel sheathed Bi2223 HTS wire. In order to make insulation around the HTS transformer coils, research has been conducted. The results of this research are the main contents of this thesis.

Since Siemens constructed the first HTS transformer in 1997, several HTS transformer projects have been developed around the world. In these HTS transformers, coils generally were wrapped by insulation materials. This insulation method is not ideal since wrapped insulation has disadvantages: displacement of insulation materials, low efficiency and variable insulation effect. In order to find a better approach, we wanted to investigate polymer coatings around HTS transformer coils.

Polyamide 6 coatings were made on aluminum substrate utilizing dipping, brush and spray methods. After which, their properties were studied, including density, breakdown strength, dielectric constant and dissipation factor. Through comparison of properties, spray coatings show the best insulating effect. Our research also included influence of heat treatment and vacuum treatment on spray coatings. Heat and vacuum treatments effect on breakdown strength is insignificant. Vacuum treatment can greatly increase the density of the coating. Heat treatment influences the dielectric constant and dissipation factor. But the breakdown strength of spray coatings is only one fifth of that of commercial polyamide film. And the density of spray coatings is about 60% of that of commercial polyamide film. All studies about polymer coating were conducted at room temperature.

Files

Filename		Size	Approximate Download Time (Hours:Minutes:Seconds)
Filename		Size	28.8 Modem	56K Modem	ISDN (64 Kb)	ISDN (128 Kb)	Higher-speed Access
	Thesis2(6).pdf	902.48 Kb	00:04:10	00:02:08	00:01:52	00:00:56	00:00:04