Rectifier control system
CA 2174684 C · Owner: Yamamoto, Yuushin · Inventors: Yamamoto, Yuushin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rectifier control system which allows a plurality of rectifiers to operate constantly in parallel by ensuring balance between the rectifiers in respect to the output voltage and current thereof. The system includes a plurality of rectifiers (11 21) arranged to operate in parallel while applying a DC voltage to a single DC bus current detectors (15, 25) provided each in association with each of the rectifiers (11 21) for detecting a bus current (ID1, ID2) flowing through the DC bus (6) voltage control circuits (13, 23) provided each in association with each of the rectifiers (11 21) for controlling the DC voltage so as to make it coincide with a voltage command value and command value …
Read the whole patent
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
- Filed April 22, 1996 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 22, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2018.
- 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
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.