Autosynchronous motor comprising a device for determining the position of the rotor relative to the stator, and method of starting such motor
US4740733A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1986 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Feb 19, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An autosynchronous motor comprises a control and power circuit for the windings of a stator generating a rotating field the angular direction of which is a function of the magnetizing direction of the permanent magnet of the rotor, and to a positioning device producing a signal representing the angular position of the rotor relative to the stator windings. This positioning device emits one pulse per rotation; it comprises a moveable member integral with the rotor and a steady or fixed member integral with the stator. The stator member of the positioning device and the stator comprise complementary means so that this stator member can, by manual operation, be rotated around the axis of the motor. Marking references are provided for predetermined angular positions of the stator member. These complementary means are, for example, on the stator constituted by a ball repelled by a spring and on the stator member by a number of notches equal to the number of pairs of the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.