The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2001
Filed:
May. 19, 1999
Heikki Rasimus, Savonlinna, FI;
ABB Industry Oy, Helsinki, FI;
Abstract
A method and arrangement for adaptively compensating for load changes, particularly in connection with an electric motor drive which comprises a motor, the shaft of the motor being connected to a load (,) having a known moment of inertia; a device (,), such as an inverter, to control the motor, a torque controller being arranged in connection with the device; and a speed controller (,) arranged to control the speed of the motor. The method comprises steps of determining, during the load change, an estimate (M,) for an external torque disturbance which causes load changes, and employing the torque disturbance estimate (M,) determined during the previous load change for compensating for the external torque disturbance in controlling the torque of the motor.