POWER EQUIPMENT AND HARMONIC SUPPRESSION METHOD IN POWER EQUIPMENT

• Main Author: SHIGA Seiki
• Format: Patent
• Language: English
• Published: 02.02.2017
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

Provided is a power equipment which obtains a power saving effect according to the operation of an electric motor by providing a harmonic suppression function on the side of a power trunk line for supplying power to the electric motor without changing the electric motor side. The power equipment includes an electric motor (14) which is supplied with power from a power trunk line (12) connected to a power source transformer (11) to be operated. A harmonic generation unit (13) is provided in the power trunk line (12) and generates a harmonic voltage having a phase opposed to but the same degree as that of a harmonic voltage of a degree acting as a braking force on a rotor (14-2) in a rotational magnetic flux of harmonics generated between a stator (14-1) and the rotor when the electric motor (14) is operated.