Control device and method for motor/generator
US6335606B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2000 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Sep 25, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor/generator has a stator provided with a plurality of coils (6), a first rotor (3) provided with a fixed number of magnetic poles, and a second rotor (4) provided with fewer magnetic poles than the first rotor (3). A current of the composite wave form is supplied from an inverter (12) to the coils (6) in response to a signal generated by a control unit (15). The control unit (15) is programmed to calculate a wave form of a first current flowing through the coils (6) which generates a rotating magnetic field which is synchronous with a magnetic field produced by the first rotor (3), and calculate a wave form of a second current flowing through the coils (6) which generates a rotating magnetic field which is synchronous with a magnetic field produced by the second rotor (4). The microprocessor (15) is further programmed to calculate a wave form of a correcting current which, at a position where a specific magnetic pole in the first rotor (3) and a pole of the second rotor (4)with the same polarity face each other, increases the density of the magnetic flux passing through the specific magnetic pole and generate the signal which realizes a composite wave form comprising wave for…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.