Method and apparatus for PWM control of voltage source inverter

Details Method and apparatus for PWM control of voltage source inverter Method and apparatus for PWM control of voltage source inverter

2007-12-11

2007-12-11

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S432000, C318S284000, C318S132000, C318S434000, C318S254100, C318S811000

Reexamination Certificate

active

11376915

ABSTRACT:
PWM methods and apparatus are provided for loss minimized control of AC motors taking into consideration inverter non-linear limitations. The method comprises providing a voltage to the AC motor based on a switching cycle, adding a duty cycle of a zero vector to each phase leg of the switching cycle when a duty cycle of a first phase leg of the switching cycle is less than a minimum duty cycle, and subtracting the duty cycle of the zero vector from each phase leg of the switching cycle when a second duty cycle of a second phase leg is greater than a maximum duty cycle. The minimum duty cycle and maximum duty cycle indicate distortion regions.

REFERENCES:
patent: 5486747 (1996-01-01), Welch
patent: 6005783 (1999-12-01), Xue et al.
patent: 6426602 (2002-07-01), McCann et al.
patent: 6643149 (2003-11-01), Arnet et al.
patent: 2005/0024902 (2005-02-01), Hiti et al.

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