| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a feeder failure due to overvoltage and charge an electric double-layer capacitor up to the maximum possible level. <P>SOLUTION: In the method of charge control, a current command value obtained by inputting a current command value output from a PI amplifier 23 to a limiter 24 to be controlled is compared with a new current command value refined by a filter 34 for refining a current command value in consideration of internal resistance of an electric double-layer capacitor using a comparator 32, and outputs a smaller current command value as a charging current command value. A deviation output between the charging current command value output from the comparator 32 and a detected value of the charging current value of the electric double-layer capacitor is obtained. The output is input to an amplifier 28 for controlling a duty ratio through a PI amplifier 26 after obtaining a PI control output for determining a duty of a bidirectional chopper means. A PWM signal corresponding to the duty ratio is created in a CMP creation part 29 from the amplifier 28. From the PWM signal and a condition signal when regenerative electric power is generated, a gate signal is obtained. <P>COPYRIGHT: (C)2011,JPO&INPIT |
