Method and system for improved thermal management of a...

Details Method and system for improved thermal management of a... Method and system for improved thermal management of a...

2006-06-13

2006-06-13

Patel, Rajnikant B. (Department: 2838)

Prime-mover dynamo plants

Electric control

Fluid-current motors

C318S801000, C363S041000

Reexamination Certificate

active

07061134

ABSTRACT:
The present invention includes a method for thermal management in a voltage source inverter. The method includes sensing a low output frequency condition, determining a zero vector modulation responsive to the sensed low output frequency condition, and applying the determined zero vector modulation to reduce thermal stress in the voltage source inverter. The step of determining the zero vector modulation responsive to the sensed low output frequency condition includes mapping an output voltage requirement to a space vector structure and determining state switching space vectors based on the mapped output voltage requirement. The step of determining the state switching space vector includes determining active state switching space vectors associated with the state switching space vectors, determining duty cycles for the active state switching space vectors based on the active state switching space vectors, and determining a duty cycle for at least one zero state switching space vector based on the determined duty cycles of the active state switching space vectors and a switching period.

REFERENCES:
patent: 4833584 (1989-05-01), Divan
patent: 6313602 (2001-11-01), Arefeen et al.
patent: 6337804 (2002-01-01), Kea et al.
patent: 6643149 (2003-11-01), Arnet et al.
patent: 6856038 (2005-02-01), Rebsdorf et al.

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