Motor/generator with multiple rotors
US6376955B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2000 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Sep 27, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P5/74
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A first rotor (9) is disposed on an inner side of a first stator (7) provided with a plurality of coils (19). A second rotor (15) is disposed on an inner side of a second stator (13) provided with a plurality of coils (21). The first rotor (9) is provided with a plurality of protruding poles made of a magnetic material not magnetized. The second rotor (15) comprises a magnet provided with a plurality of magnetic poles. The number of the poles of the second rotor (15) is different from the protruding poles of the first rotor (9). The coils (19) of the first stator (7) and the coils (21) of the second stator (13) are connected in series to an inverter (27). The microprocessor (27) calculates a first AC current with which the coils (19) of the first stator (7) generate a rotating magnetic field rotating in synchronism with the first rotor (9), and a second AC current with which the coils (21) of the second stator (13) generate a rotating magnetic field rotating in synchronism with the second rotor (15). The microprocessor (27) controls the inverter (29) to supply a composite current of the first and second alternating currents to the coils (19, 21).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.