| 摘要 |
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. |
