Abstract
Although the development of fluorescent fiber optic temperature measurement technology have overcome the difficulty of the surface temperature distribution measurement of a rotor of electric machine. The temperature of the conductor (or magnetic) strips which are buried under the surface of the rotor yet not be resolved. A new measuring scheme of fluorescent optical fiber is presented in this paper. It is fully suitable for the above measuring demands. Several fiber probes are assembled with the rotor. The sensor heads are buried under the rotor surface to touch the measuring points. The other ends of the fiber probes are terminated on an optical rotational coupling disc. The induced temperature signals then are sequentially transmitted out to the external of the rotor by another fix fiber. Finally the temperature of the strips is obtained. In this paper we will discuss the selection of light source, the design of light path and derive the theory analysis of dynamic coupling.
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