| CPC H02P 27/085 (2013.01) [H02P 6/08 (2013.01); H02P 7/28 (2013.01)] | 7 Claims |
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1. A processing apparatus for reducing voltage fluctuations on a power feeding path for feeding power from a direct current power supply to at least one motor controller, the apparatus comprising:
a filter circuit including a plurality of predetermined units each including a circuit element and a semiconductor switch, the circuit element including at least one predetermined passive element, the semiconductor switch being configured to control a current to be fed to the circuit element, the filter circuit being connected to the power feeding path; and
a controller configured to control switching of the semiconductor switch included in each of the plurality of predetermined units in the filter circuit to reduce voltage fluctuations or current fluctuations of direct current on the power feeding path, wherein
the filter circuit adjusts a resonance characteristic across the filter circuit by switching the semiconductor switch included in each of the plurality of predetermined units,
the controller controls the switching of the semiconductor switch based on a rotation speed of a motor receiving a drive current fed from the at least one motor controller or a pulse-width modulation frequency of the at least one motor controller to reduce voltage fluctuations or current fluctuations of the direct current on the power feeding path, and
the controller controls the switching of the semiconductor switch in each of the plurality of predetermined units to cause a resonance frequency on the power feeding path connected to the filter circuit to be out of a predetermined frequency range having a center frequency being a frequency of the drive current based on the rotation speed of the motor or the pulse-width modulation frequency in the at least one motor controller.
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