Title:
ACTIVE FILTER
Document Type and Number:
Japanese Patent JP2784134
Kind Code:
B2
Abstract:
PURPOSE: To allow stabilized control for as a capacitive load to be compensated having an antiresonant point, as well as for the high order harmonics, determining a compensation current reference for an arbitrary harmonic including the basic wave.
CONSTITUTION: Basic wave processing circuits 10p1, 10p2 convert the three-phase current IL into two-phase currents id1, iq1-idn-iqn for an arbitrary harmonic component of load current. The two-phase currents are filtered through low-pass filters 10c1-10cn and then the two-phase currents id1, iq1-dn, iqn are converted into three-phase currents IL1-ILn which are subjected to phase compensation or gain compensation with respect to the three-phase currents IL1-ILn. An adder 21 combines the outputs from the basic wave processing circuits 10p1-10pn. This constitution allows phase compensation or gain compensation for each order and realizes stabilized control while ensuring the phase margin.
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Inventors:
FURUTA MICHIHIRO
Application Number:
JP22241593A
Publication Date:
August 06, 1998
Filing Date:
September 07, 1993
Export Citation:
Assignee:
MITSUBISHI DENKI KK
International Classes:
H02J3/01; H02J3/18; H03H21/00; (IPC1-7): H02J3/01
Domestic Patent References:
| JP549172A |
Attorney, Agent or Firm:
Soga Doteru (6 people outside)