Stepping motor drive method and apparatus
CA 1111904 A · Owner: Fluke (John) Mfg. Co. Inc. · Inventors: Drabing, Richard B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A driver circuit for controlling the excitation of a multi-phase stepping motor is described which includes a switching power supply providing two average power output levels. The switching power supply provides a high voltage at the initiation of each excitation of a motor winding and a modulated voltage having an average at the normal operating level. The driver according to the invention eliminates need for dual power supplies and damper resistors.
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 November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 1998.
- 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.