Variable-speed drive for control of induction generators,申请号US19800220865-传众专利搜索

Variable-speed drive for control of induction generators

申请公布号：US4401938(A)

申请号：US19800220865

申请日期：1980.12.29

申请公布日期：1983.08.30

申请人：

LOCKHEED CORPORATION

发明人：CRONIN, MICHAEL J.

分类号：F02N11/04;H02P9/42;(IPC1-7):F02N11/00;H02P9/06;H02P9/46;H02P15/00

主分类号：F02N11/04

摘要：The invention is an aircraft power generation system which utilizes an induction-machine (G1) as a primary generator of variable-voltage/variable-frequency power. The induction-machine (G1) is directly driven by the engine (14) and is excited by an excitation-generator (G2) such that the induction-machine (G1) operates in a generating mode. A variable-speed drive (20), shown as a toroidal drive (30), controls the excitation frequency of the induction-machine (G1) such that the negative slip-frequency is controlled as a function of the input speeds (N1), (N2) and the electric load on the generator. Control of the toroidal drive (30) and thus speed (N2) is accomplished by a negative-slip control circuit which includes a drive control logic circuit (36), a proportional actuator (34), a control-start panel (48), and a steering mechanism (32). In another aspect of the invention, the induction-machine (G1) operates in a start-mode to start the engine (14). In this mode of operation, after engine starting is initiated from control-start panel (48), a start-logic circuit (52) establishes a programmed voltage/frequency output from a start-power electronics source (46). The voltage/frequency output, programmed from a low value, against time, up to a predetermined high value is applied to the induction-machine (G1) field to bring the engine (14) up to speed.