Patent · US Active

Connection of an electric motor to a supply network

US8242719B2 · kind B2 · utility

5Cited by

3References

20Claims

0Family size

Assignee

VACON OYJ · FI

Inventors

Shekhar Kubal · Vaasa, FI
Stefan Strandberg · Auweg, FI
Ahti Rauma · Sundom, FI

Key dates

Filing date	Feb 27, 2009
Grant date	Aug 14, 2012
Priority date	—
Expiry date	Apr 16, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH02P1/26
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Method and arrangement for connecting an AC electric motor (M1, M2, . . . MN) to an AC electricity network (L) in a system which comprises a frequency converter (FC), with which the motor is started, and contactors (S11, S12, S21, S22, SN1, SN2), in which method the supply source is changed by means of the contactors from the frequency converter to a direct network supply, in which method the frequency converter is stopped before changing the supply source, and in which method in connection with changing the supply source the control of the contactors is started before stopping the frequency converter.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.