Title:
CONSTANT SWITCHING METHOD OF SPEED CONTROLLER
Document Type and Number:
Japanese Patent JPS60220404
Kind Code:
A
Abstract:
PURPOSE:To always ensure the stable control by switching the control constant of a PI controller before and after a turbine peforms the biaxial synchronization. CONSTITUTION:A biaxial synchronization state is detected by the actuation of a relay 28, and relay contacts 38 and 39 short circuit impedances 31 and 34 or insert them. If the impedance 31 has a short circuit by the actuation of the relay 28, the linear amplifier OP-1 increases its amplification factor. While the integration constant is shortened when the impedance 34 has a short circuit. Thus it is possible to detect the biaxial synchronization and to switch properly the proportional gain and the integration time of a PI controller.
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Inventors:
ISHIKAWA TOSHIYOSHI
Application Number:
JP7650184A
Publication Date:
November 05, 1985
Filing Date:
April 18, 1984
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G02B7/08; F01D19/00; G05B7/02; G05B13/00; G05B13/02; (IPC1-7): F01D19/00; G02B7/02; G05B13/02
Attorney, Agent or Firm:
Akio Takahashi