Title:
AC/DC CONVERTER CONTROLLER
Document Type and Number:
Japanese Patent JP2798595
Kind Code:
B2
Abstract:
PURPOSE: To improve the response of the control of a control angle to the occurrence of a transmission failure by a method wherein measured values of a voltage or a current are directly inputted and a running average is observed to detect the fluctuation of a system caused by the occurrence of the failure, etc.
CONSTITUTION: In order to calculate the running average of a phase voltage Ea, sampled values V(n), V(n-1) and V(n-2) of Ea are stored successively in a memory. Then the sampled values V(n-1) and V(n-2) which are stored immediately twice before the sampled value V(n) is obtained are read out of the memory and the average value of V(n) and those two values is calculated. The obtained average value is defined as a phase voltage V(N) at the newest time of obtaining the sampled value V(n). In the same way, phase voltages Eb and Ec are individually inputted and their running averages are independently calculated to obtain phase voltages V(N). As a result, the response of the control of a control angle to the occurrence of a transmission failure, etc., can be improved.
Inventors:
Naofumi Nishikawa
Application Number:
JP33453493A
Publication Date:
September 17, 1998
Filing Date:
December 28, 1993
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02J3/38; G05F1/10; H02M7/155; H02M7/48; (IPC1-7): H02J3/38
Domestic Patent References:
JP5103482A | ||||
JP5953038A | ||||
JP61236328A |
Attorney, Agent or Firm:
Hiroaki Tazawa (1 person outside)
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