Pole change induction motor and control apparatus and method for the same
US6008616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1995 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Dec 12, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/16
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An apparatus for a pole change induction motor and control method for the same which are applicable to, for example, a driving source of an electric vehicle without power transmission are disclosed. In the control apparatus and method for the pole change motor is electrically changed between an n number of poles and a 2n number of the poles (n=2, 4, - - - ) so as to secure an output torque of the pole change induction motor in a constant driving mode with a high rotation speed of the induction motor without increase in a dimension of either of the induction motor or an inverter associated with the pole change induction motor and without occurrence in a torque variation. In a preferred embodiment, two channels of exciting and torque instructions and slip frequency generators (current instruction calculating blocks and current control systems) are provided for the n number of pole driving and 2n number of pole driving.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.