Control system for a power converter driving a synchronous motor
CA 1259654 A · Owner: Toshiba Mitsubishi-Electric Industrial Systems Corporation · Inventors: Kuroiwa, Akihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a control system for a power converter driving a synchronous motor, comprising a controllable rectifier and an inverter of a load commutation type a speed, target is passed through a variation rate limiter for limiting the variation rate to produce a speed reference varied to follow the speed target but within a limited rate. A speed controller is responsive to the speed reference and the detected speed of the motor for producing a current reference. A current control circuit is responsive to the current reference and the detected current of the rectifier for adjusting the average current through the rectifier thereby to reduce the deviation of the detected speed from the speed …
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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 September 19, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 19, 2006.
- 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.