Title:
CURRENT CONTROLLING DEVICE FOR ELECTRIC POWER CONVERTER
Document Type and Number:
Japanese Patent JPS5860326
Kind Code:
A
Abstract:
PURPOSE:To stably control load current with high response by connecting a current variation controlling circuit to a current controlling circuit controlling the average value of load current in parallel. CONSTITUTION:When a current command value IMC is increased, a current controlling circuit 5 outputs a current rate command value IRC. A current rate controlling circuit 7 outputs an arc angle command alpha based upon the difference between the current rate command value IRC and a current variation value IRF during an arc pulse period. A gate pulse generating circuit 9 applies arc pulses to thyristors S1-S6 in an electric power converter 1 at an arc angle in accordance with the command alpha, so that current I is increased while pulsating and mean current value IM outputted from a filter 6 is also increased. Since a current variation detecting circuit 8 detects the current variation value IRF instantly in every generation of an arc pulse, current control can respond at a high speed. A current rate controlling system speeding up the changing direction of current I is connected as a minor loop, so that stable control is made possible even if the gain of the circuit 5 is increased.
Inventors:
OOMAE TSUTOMU
MATSUDA TOSHIHIKO
TACHIKAWA MAKOTO
MATSUDA TOSHIHIKO
TACHIKAWA MAKOTO
Application Number:
JP15929481A
Publication Date:
April 09, 1983
Filing Date:
October 05, 1981
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H02M1/08; G05F1/10; G05F1/46; H02M3/135; H02M7/525; H02P1/18; H02P7/292; (IPC1-7): G05F1/64; H02P13/16
Attorney, Agent or Firm:
Katsuo Ogawa