A Constant Turn-Off Time Control for Variable Frequency Thyristor Inverters
- 1 September 1977
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industry Applications
- Vol. IA-13 (5) , 418-422
- https://doi.org/10.1109/tia.1977.4503432
Abstract
A new type of control system is described for thyristor inverters that are used to supply high-frequency power loads where the exact value of the frequency is not critical, such as for induction beating. Commutation is provided by a parallel LC tank circuit which is operated above its resonant frequency. The amount of reactive power is controlled by adjusting the actual operating frequency of the inverter. The control system is designed to maintain a constant turn-off time for each commutation every half-cycle, independent of the frequency. Also, it has a very rapid response to changes in the load conditions, thereby decreasing the chance of a commutation failure and reducing the need for additional safety margin.Keywords
This publication has 2 references indexed in Scilit:
- Latest Developments in Static High Frequency Power Sources for Induction HeatingIEEE Transactions on Industrial Electronics and Control Instrumentation, 1970
- New Developments in High-Frequency Power SourcesIEEE Transactions on Industry and General Applications, 1970