Method and control apparatus for controlling an AC-machine
US5708346A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jun 11, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Jun 11, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2380/26
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for the control of an AC-machine is set forth with a special winding for the combined generation of a torque and of a transverse force in the machine. In this arrangement, the magnitude and direction of a transverse force acting on the rotor of an AC-machine is controlled via the current of a control winding of the machine. For this purpose, the magnitude and direction of a flux of the machine generated by a drive winding and also the torque-forming component of the drive current is detected. From these parameters, the desired value of the control current vector can be precisely calculated via a decoupling equation in a coordinate system which is rotating with the machine flux. Through vector rotation, through the flux angle and a constant angle, which takes into account of the position of the winding axes of the drive and control windings, the desired value of the control current vector can be transformed into the stator coordinate system of the control winding. The desired currents for the individual winding trains are determined as a result of this control current vector. These currents are impressed into the winding by a current feed apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.