Investigations into the use of dielectric coatings in magnetic switches

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6705892

Harjes, H C; Sharp, D J; Mann, G A; Morgan, F A; Yelton, W G

High reliability, high efficiency, long lifetime magnetic switches (saturable reactors) will be required in the high power pulse compression systems which are now being considered for use in several applications. One of the most critical components in a magnetic switch is its inter lamina insulation. In high speed (high magnetization rate) magnetic switches, the insulation requirements are severe and the thermal management of core losses is a serious design issue. In such a switch, the inter lamina voltage can approach 1000 V and, at present, dielectric films (such as Mylar, Polycarbonate, Kapton, etc.) are the only insulation options. These insulations, however, make the thermal management problem more difficult because they have low thermal conductivities and because substantial margins are required on the sides of the core. In addition, it is difficult to realize the normal holdoff strengths of thin films when they are wound with Metglas (the magnetic material of choice in most high speed switches) because the films can be degraded during the winding process by the rough Metglas surface. This paper reports the results of our investigations into the possibility of using conformal dielectric coatings as a viable insulation option in high speed magnetic switches. 10 refs., 8 figs., 1 tab.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6705892
• Report Number(s): SAND-90-0415C; CONF-9006176--10; ON: DE90014331
• Country of Publication: United States
• Language: English

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Energy Storage
BREAKDOWN
CHEMISTRY
COATINGS
DIELECTRIC MATERIALS
ECONOMICS
EFFICIENCY
ELASTICITY
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ELECTROCHEMISTRY
ELECTROPHORESIS
ENERGY EFFICIENCY
EQUIPMENT
FAILURE MODE ANALYSIS
LOSSES
MAGNETIC CORES
MAGNETIC PROPERTIES
MAGNETIC STORAGE DEVICES
MANUFACTURING
MATERIALS
MEASURING METHODS
MECHANICAL PROPERTIES
MEMORY DEVICES
PERFORMANCE
PHOTOSENSITIVITY
PHYSICAL PROPERTIES
PULSES
RELIABILITY
SENSITIVITY
SERVICE LIFE
SWITCHES
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TECHNOLOGY ASSESSMENT
TENSILE PROPERTIES
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES