Control circuit for variable reluctance motor
CA 1063167 A · Owner: Ford Motor Company Of Canada · Inventors: Piatkowski, Philip (Jr.)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control circuit for a variable reluctance motor comprises a solid state switching device having its output circuit connected in series with the electrical winding of the motor. A circuit is coupled to the motor winding and to the control electrode of the solid state switching device and senses the EMF induced in the motor winding resulting from residual magnetism while the motor is rotating and the switching device output is nonconductive. The switching device output circuit is rendered conductive when the EMF attains a predetermined level. The motor acts as its own position sensor.
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
- Granted September 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 25, 1996.
- 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.