Method and apparatus for the digital determination of the field angle of a rotating-field machine
CA 1304775 C · Owner: Siemens Aktiengesellschaft · Inventors: Schlegel, Thomas; Reng, Leonhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An angle is calculated with high time resolution for the field angle of a rotating-field machine in order to control the rotating-field machine. Due to the inertia of the system the speed of rotation of the field vector changes slowly. A microprocessor reads the measured values of current and voltage only at a slow rate (tµ). The values are processed into the components of an EMF vector which is converted as to magnitude (?) and a discontinuously changing value (.omega.) for the frequency of a flux vector or the EMF vector. A hardware integrator (INT1) is coupled to the microcomputer and furnishes a quasicontinuously changing signal (?) for the field angle at a high computing rate under the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.