Title:
CONTROLLER OF THYRISTOR CONVERTER
Document Type and Number:
Japanese Patent JPS5932018
Kind Code:
A
Abstract:
PURPOSE:To realize an answer control of the shortest time without generating a steady error, by calculating the resistance of a load from the current and terminal voltage of the load and changing the gain constant to a constant which does not generate the steady error. CONSTITUTION:The resistance of a load is calculated from the current and the terminal voltage of the load, and the gain constant is changed to a constant which produces no steady error. For instance, the load current command value is supplied to a current control circuit 6, and the control signal is supplied to an automatic pulse phase shifter 5 via a sample holding circuit 9 and a limiter 8. Then the control signal which controls the phase of a thyristor of a thyristor converter 1 from the shifter 5. A DC current is supplied to a load 3 via a DC reactor 2, and the current and terminal voltage of the load 3 are detected by a current detector 4 and a voltage detector 11 and then supplied to a load resistance calculating part 12 to calculate the load resistance. This calculated load resistance is reflected on the load resistance of a gain constant 10 for each sampling period.
Inventors:
SUZUKI SHIYOUJI
Application Number:
JP14115982A
Publication Date:
February 21, 1984
Filing Date:
August 16, 1982
Export Citation:
Assignee:
HITACHI LTD
HITACHI ENG CO LTD
HITACHI ENG CO LTD
International Classes:
G05F1/455; (IPC1-7): G05F1/455
Attorney, Agent or Firm:
Akio Takahashi