Electric motor drive equipped with a permanently magnetized rotor
US4684860A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1986 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Jan 23, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The motor (9) comprises a motor winding with two phases (2, 3). Sensor c detects the orientation of the permanently magnetized rotor. Selector (S) controlled by line (s) which can be connected to a memory (M) selects the sending to circuit (C) of clock pulses (H) or signals (G) coming from circuits (F) which receives the pulses emitted by sensor (c). In circuit (C) the signals received from the selector are processed and shaped into control signals which act in the power stage of circuit (P) upon each of the two phases (2, 3) by triggering and releasing them alternately in such a way as to ensure that the operation of the rotor occurs either in step mode, under the influence of the clock signals (H), or in direct current mode, i.e., as a function of the momentary position of the rotor as it is detected by sensor (c).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.