Method and apparatus for reconstructing motor current from...

Details Method and apparatus for reconstructing motor current from... Method and apparatus for reconstructing motor current from...

2006-01-10

2006-01-10

Duda, Rina (Department: 2837)

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

C318S254100, C318S434000, C318S132000, C318S811000, C363S037000, C363S039000, C363S074000

Reexamination Certificate

active

06984953

ABSTRACT:
In a PWM space vector modulation inverter motor drive system, PWM cycles are modified to permit motor phase currents to be reconstructed as observable on the DC bus link. The PWM cycles are modified near sector boundaries so that measurements taken at the DC bus link correspond to actual motor phase currents. With this technique, a single DC bus current measure can be used to reconstruct all motor phase currents, while also providing fault protection.

REFERENCES:
patent: 4757435 (1988-07-01), Wood et al.
patent: 5483140 (1996-01-01), Hess et al.
patent: 5642273 (1997-06-01), Lai et al.
patent: 5949664 (1999-09-01), Bernet et al.
patent: 5959431 (1999-09-01), Xiang
patent: 6462974 (2002-10-01), Jadric
patent: 6839249 (2005-01-01), Kalman et al.

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