抄録
The ambient temperature influences the thyristor's firing characteristics considerably. In this paper, the theoretical analysis and technical applications of this phenomenon are described. It is shown theoretically and experimentally that the breakover voltage influenced by the ambient temperature depends on the leakage current of the thyristor, and the breakover voltage influenced by the gate current depends on the current amplification factor α. In addition, the technical applications of this characteristic to the thyristor relaxation oscillator and the temperature controller are developed. In such an oscillator, the frequency depends on the ambient temperature, and therefore the ambient temperature can be measured by the frequency. Moreover, the temperature characteristic of a pair of back-to-back thyristors is useful also as a temperature switch, and such a switch can be used as a fan controller.
