H - Electricity – 02 – M
Patent
H - Electricity
02
M
H02M 1/12 (2006.01) H02J 3/18 (2006.01) H02K 47/22 (2006.01) H02P 7/62 (2000.01)
Patent
CA 2257794
The present invention relates to a method and an apparatus for filtering an electric current supplied to a motor (M). A current supplied from a frequency transformer means (4) provided with a voltage source circuit to the motor (M) is conducted through a coil means (L) between the frequency transformer means (4) and the motor (M) for preventing any essential rapid increases of the current. The reactive current portion of the motor (M) is compensated by a condenser means (C) arranged between the frequency transformer means (4) provided with the voltage source circuit and the motor (M). By means of the inventive filter the reactive current of the motor (M) is essentially compensated and the power ratio thereof is increased.
La présente invention concerne un procédé et un appareil de filtrage d'un courant électrique fourni à un moteur (M). Un courant, fourni à partir d'un transformateur de fréquence (4) comprenant un circuit source de tension, est dirigé vers le moteur (M) en passant par des bobines (L) situées entre le transformateur de fréquence (4) et le moteur (M), afin d'empêcher toute augmentation rapide et importante de l'intensité. La portion de courant réactif du moteur (M) est compensée par un condensateur (C) placé entre le transformateur (4), comprenant le circuit source de tension, et le moteur (M). Au moyen du filtre de l'invention, le courant réactif du moteur (M) est tout à fait compensé et le rapport de puissance du moteur est augmenté.
Alamaki Jarmo
Borden Ladner Gervais Llp
The Switch Electrical Machines Oy
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