Pole change induction motor and control apparatus and method for

Details Pole change induction motor and control apparatus and method for Pole change induction motor and control apparatus and method for

1995-12-12

1999-12-28

Martin, David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318775, 318801, H02P 138

Patent

active

060086165

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.

REFERENCES:
patent: 3673477 (1972-06-01), Broadway et al.
patent: 4489265 (1984-12-01), Kuznetsov
patent: 5107435 (1992-04-01), Yamada
patent: 5136228 (1992-08-01), Yamada et al.
patent: 5204607 (1993-04-01), Hugel et al.
patent: 5444351 (1995-08-01), Tamamura et al.
Mizuno et al., "Analysis of a change in Number of Poles in a Pole Change Induction Motor Applicable for an Electric Vehicle by Means of a Six-Phase Absolute Transformation Rotating d-g axes", Oct. 3, 1994.

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