Prof. Y. Ueda, DEng

H. Ohta, DEng

Prof. C. Uenosono, DEng

The authors are with the Department of Electrical Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606, Japan

The behaviour of airgap flux of synchronous generators was studied and a measurement method for airgap flux density distribution was established. Based on these results, a microprocessor-based instrument for the measurement of airgap flux density distribution has been developed. The authors describe this instrument, by the use of which it is possible to measure exact airgap flux distribution of on-load synchronous generators in real time.1 Introduction

2 The measuring principle and method

2.1 Airgap flux density distribution

2.2 Calculation of Fourier coefficients

2.3 Extraction of fundamental stationary components

3 Outline of measuring instrument

4 Examples of measurements

5 Conclusions

Related paper

- Ueda, Ohta, and Uenosono : "A microprocessor-based instrument for measurements of stationary component on the rotor of air-gap flux distribution of on-load synchronous generators,"

Proc. ISCAS 85, pp. 1263-1264 (1985)