Title:
【発明の名称】非同期機の固定子磁束の見積りを決定する方法
Document Type and Number:
Japanese Patent JPH08508155
Kind Code:
A
Abstract:
PCT No. PCT/FI94/00071 Sec. 371 Date Aug. 24, 1995 Sec. 102(e) Date Aug. 24, 1995 PCT Filed Feb. 24, 1994 PCT Pub. No. WO94/22213 PCT Pub. Date Sep. 29, 1994Apparatus for determining an estimate for the stator flux of an asynchronous machine when the supply frequency omega s, stator inductance Ls, at least one of stator resistance Rs and an estimate Rse therefor, and short-circuit inductance sigma Ls are known, is carried out by structure for measuring the stator current +E,ovs 1+EE s and stator voltage +E,ovs u+EE s, calculating a difference voltage by subtracting at least one of the product of the stator resistance and the estimate thereof and the stator current from the stator voltage, integrating the difference voltage in relation to time to give a stator flux estimate +E,ovs psi +EE se, subtracting, prior to integrating a correction term based on the feedback stator flux estimate +E,ovs psi +EE se and being proportional to the product of the difference variable and the direction vector +E,ovs C+EE given therefor, from the difference voltage, determining the difference variable from the equation: (+E,ovs psi +EE se-Ls+E,ovs 1+EE s)x(+E,ovs psi +EE se- sigma Ls+E,ovs 1+EE s)= epsilon and forming the direction vector +E,ovs C+EE from the feedback stator flux estimate +E,ovs psi +EE se by turning it for the angle theta which is dependent on the operational mode of the machine.
Inventors:
Heikkiler, Samuri
Application Number:
JP52068094A
Publication Date:
August 27, 1996
Filing Date:
February 24, 1994
Export Citation:
Assignee:
AB Industry Osaka salmon yukichu
International Classes:
G01R31/34; H02P21/12; H02P21/14; (IPC1-7): H02P7/36
Attorney, Agent or Firm:
Akira Asamura (3 outside)