| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an elevator controller which is reduced in size while having a high frequency suppression filter requiring no damping resistor. <P>SOLUTION: The elevator controller comprises a high frequency suppression filter 2 consisting only of a reactor and a capacitor connected with a commercial power supply 1, a converter 4 for converting an input AC into DC, AC current detectors 3a and 3b for detecting a current flowing on the AC side of the converter, PI controllers 82a and 82b for obtaining a voltage command by PI control operation on the basis of current detection signals from the AC current detectors, filters 83a and 83b passing the components of a resonance frequency and higher frequencies from the current detection signals, and a PWM controller 86 for performing PWM control of the converter on the basis of a final voltage command obtained by performing addition for the voltage command output from the PI controller such that the resonance frequency components output from the resonance frequency passing filter are offset. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
